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CRADEN
P E R I P H E R A L S
C O R P O R A T I O N
DP8 & DP9
DOCUMENT PRINTERS
TECHNICAL MANUAL
P/N 99090
REVISION 7
7/2007
7860 AIRPORT HIGHWAY, PENNSAUKEN, NJ 08109
(856) 488-0700 (856) 488-0925 FAX
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DP8 & DP9 Technical Manual Table of Contents
1.0
2.0
DP8 & DP9 DOCUMENT PRINTERS - FUNCTIONAL SPECIFICATIONS
INSTALLATION
1
2.1
2.2
INSTALLATION PROCEDURE
RESHIPMENT
2
3
3.0
OPERATION
3.1
3.2
3.3
3.4
3.5
RIBBON CARTRIDGE LOADING
3
4
4
5
5
6
7
7
8
KEYPAD OPERATION
DISPLAY OPERATION
DOCUMENT INSERTION
CONFIGURATION
3.5.1
3.5.2
3.5.3
3.5.4
Printer Parameters
Communication Parameters
Override Parameters
Service Parameters
3.6
DIAGNOSTICS
3.6.1
3.6.2
SELF TEST
LOCAL PRINTING
ERROR CONDITIONS
Power Up Diagnostics
Enhanced Diagnostics
8
9
9
9
3.7
3.8
3.9
3.9.1
3.9.2
3.9.3
3.9.4
3.9.5
3.9.6
Document Jam
Cover Open
Page Overflow
Carriage Fault
Clear Eject Jam
Narrow Document
9
9
9
9
9
9
3.10 PROGRAMMING
3.10.1 Command Summary
10
10
11
12
14
14
14
15
15
16
16
17
17
17
18
18
18
18
19
19
19
19
20
20
20
20
3.10.2 Document Movement Commands
3.10.3 Print Commands
3.10.4 Low Density Graphics Commands
3.10.5 High Density Graphics Commands
3.10.6 Display Commands
3.10.7 Configuration Commands
3.10.8 Status and Keypad Commands
3.11 Drivers
3.11.1 Installing Craden Drivers on WINDOWS 95 OR 98
3.11.2 Installing Craden Drivers on WINDOWS NT, 2000 OR XP
3.11.3 Installing Craden USB Drivers on WINDOWS NT, 2000 OR XP
3.11.4 Using Printer Resident Device Fonts
3.11.5 Writing to the Printer LCD Display
3.12 INTERFACING
3.12.1 Input Buffer Operation
3.12.2 Interface Protocols
3.12.3 Interface Signals & Cables
3.13 PROBLEM SOLVING
3.13.1 No Display or Blocks Displayed
3.13.2 Unchangeable Configuration Parameters
3.13.3 No Document Motion
3.13.4 Carriage Fault or No Carriage Motion
3.13.5 No Printing or Light Printing
3.13.6 Ribbon Smear
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3.13.7 Erratic Document Feed, Mispositioning or Overprinting
3.13.8 Rollers Run at Power-Up or After Document Ejected
3.13.9 Erratic Character Spacing or Carriage Hitting End Stops
3.13.10 Interface Inoperative
20
20
20
20
4.0
THEORY OF OPERATION
4.1
OVERVIEW
21
21
21
21
22
22
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
Carriage Drive Assembly
Document Drive Assembly
Switching Power Supply
Main Printed Circuit Board
Keypad/Display Assembly
4.2
ELECTRONICS IN DETAIL
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
Low Voltage Supplies
Microprocessor System
Stepper Motor Drivers
Printhead Drivers
Keypad and Display
Sensors
22
22
22
25
25
25
25
Character Printing
5.0
MAINTENANCE
5.1
LUBRICATION AND CLEANING
5.1.1
5.1.2
5.1.3
5.1.4
5.1.5
5.1.6
Lubrication
Document Feed Roller Cleaning
Sensor Cleaning
Printhead Cleaning
Document Print Area Cleaning
Cabinet Exterior Cleaning
27
27
27
28
28
28
29
29
5.2
5.3
5.4
SERVICE PARAMETER SET-UP PROCEDURE
ELECTRICAL ADJUSTMENTS
MECHANICAL ADJUSTMENTS
5.4.1
Printhead Gap
30
31
32
33
33
33
33
34
34
35
35
5.4.1.1 Ribbon Shield Removal/Replacement
5.4.1.1.1 Ribbon Shield Face Inspection
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
5.4.7
5.4.8
5.4.9
Carriage Drive Belt Tension
Document Drive Belt Tension
Carriage Shaft Cam and Shaft Rack
Rear Document Roller Spring Force
Auto Alignment Gate Ramp
Auto Alignment Gate Height
Front Document Roller Spring Force
Auto Alignment Skew Sensor Calibration
5.5
REPLACEMENT PROCEDURES
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.5.8
5.5.9
Cabinet
Main PCB
Sensor PCB
Keypad
Display
Power Supply PCB
Carriage Motor
Document Motor
Printhead
35
35
36
36
36
36
36
37
37
37
37
5.5.10 Carriage Drive Belt
5.5.11 Document Drive Belt
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5.6
TROUBLESHOOTING
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5
5.6.6
5.6.7
5.6.8
5.6.9
Basic Troubleshooting Procedure
No Display
38
38
38
39
39
40
40
40
41
41
41
41
42
Defective Keypad
Defective Sensor
No Document Motion
No Carriage Motion
No Print or Light Print
Print Quality
Missing Dots
5.6.10 Erratic Document Feed or Mispositioning
5.6.11 Erratic Character Spacing or False Document Jams
5.6.12 Interface Inoperative
5.6.13 Diagnostic Flowchart
5.7
5.8
RECOMMENDED SPARE PARTS
RECOMMENDED SERVICE TOOLS
43
43
6.0
MAJOR ASSEMBLY ILLUSTRATIONS & PARTS LISTS
Printer Diagram
44
45
46
47
49
50
51
52
53
54
55
Major Assembly Tree
73802 Carriage
73804 Box
73806 Carriage Drive
73809 Lower Drive
73810 Document Drive
73815 Keypad/Display
73816 Electromechanical
73819 Printer
72135 Main PCB (including 72133 keypad and schematics)
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DP8 & DP9 DOCUMENT PRINTERS - FUNCTIONAL SPECIFICATIONS
1.1 Print Characteristics
Print Method
Print Spacing
Fonts
24-wire dot matrix impact, automatic thickness compensation
5, 6, 8.5, 10, 12, 17, 20 and 24 chars/inch
96 char. ASCII, international character set
Windows True Type & graphics
Print Speed
(chars/second)
Characters/inch
Correspondence
Normal
150
180
Draft
225
270
10
12
75
90
Dot Graphics
(dots/inch)
60,120,180, 360 horizontal; 72, 180 vertical
Feed Speed
50 mSec. single line feed at 5 or 6 lines/inch
12 inches/second (305 mm/sec) slew speed
Feed Accuracy
Ribbon
+/- 0.6%
Cartridge life DP8: 3 million characters, DP9: 5 million characters
1.2 Document Characteristics
Media
Single sheets, multipart forms (up to 6 parts), passbooks & envelopes
Print Line Width
Form Width
DP8: 5.6” (142mm), DP9: 8.2” (208mm)
2.5” (64 mm) to 6.5” (165mm) in DP8 or 9.7” (246mm) in DP9
DP8: wider forms printable in landscape mode
Form Height
2.5” (64 mm) minimum, no maximum
0.0035” (0.09 mm) to 0.062” (1.57 mm)
Form Thickness
Non-printable areas Top of form
Above horiz. fold
0.16” (4.1mm)
0.38” (9.7mm)
0.30” (7.6mm)
0.45” (11.4mm)
0.25” (6.4mm)
Below horiz. fold
Bottom of form
Vertical fold/edge
1.3 Interface
Standard Serial
RS-232, 1200-38400 baud, 11KB buffer, dual ports on DP9
IBM Proprinter/4722, Unisys and Craden
DTR, Xon/Xof
Command Sets
Protocols
Optional
USB port, Parallel port
Power Input
100-240 VAC, 43-63 Hz, 80 W max.
1.4 Physical Characteristics
Dimensions
DP8: 10.6” (269mm) wide, 7.2” (183 mm) deep, 7” (178 mm) high
DP9: 13.8” (351mm) wide, 9.8” (249mm) deep, 7.2” (184mm) high
Weight
DP8: 11 pounds (5 kg) + 1.3 pounds (0.6kg) packing
DP9: 14.4 pounds (6.5 kg) + 3.4 pounds (1.5 kg) packing
1.5 Environment & Standards
Operating
Storage
10 to 40° C, 10 to 90% humidity
-30 to 70°C, 5 to 95% humidity
Standards
UL 1950 & Canadian UL Listed
FCC 20780 Class A certified
IEC 950 & CE certified
1
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2.0 INSTALLATION
2.1 Installation Procedure
1. Read 3.1 to 3.5.2 on Operation and Configuration.
2. Press the cabinet latches on the lower front cabinet sides and rotate the cabinet upwards.
3. Remove the foam blocks on each side of the carriage.
4. Install the ribbon cartridge (See 3.1)
5. Connect the interface cable. (See 3.11.3 for cabling information).
6. Check that the power switch on the printer rear is off (“0” side depressed). Connect the line
cord between the printer and an electrical outlet. The printer accepts 110 to 240VAC
nominal input. If a line cord was not supplied with the printer procure an IEC HAR line cord
that has an IEC 320-C13 style connector and the appropriate HAR plug for your country.
7. Turn on the power switch. READY should appear on the display. If the display is not legible
adjust the contrast knob located on top of the mechanism beneath the cabinet.
8. Configure printer and interface parameters (See 3.5-3.5.2) using 92 and 93 FUNCT.
Common variations to the default settings are a higher baud rate for better throughput,
EMULATION MODE I for Proprinter emulation and PROTOCOL = XON/XOF for software
that does not use DTR hardware handshaking. Function 94 settings are factory set for a
specific printer and should not be changed.
9. Perform a local print test (See 3.8) with 95 FUNCT.
10. If host printing is incorrect, check that 93 FUNCT Communication Parameters match the
host parameters and review all 92 FUNCT Printer Parameters.
1
3
Push in on cabinet latches
Rotate cabinet up and back.
Rotate lift ring forward to lift
and lock carriage.
Remove foam shipping blocks.
RUBBER
WHEEL
RIBBON
PATH
4
5
6
RIBBON
SHIELD
TABS
Push ribbon guide plate tabs
down.
Slip ribbon over and behind
guide plate tabs.
Rotate cartridge into place and snap in.
Rotate cartridge drive gear clockwise to
align and take up ribbon slack. Push
shield up. Lower carriage into operating
position. Close cabinet.
2
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2.2 Reshipment
If possible, retain the original packing material for reshipment. If the original packing material is
not used, insure that printer and the printer carriage will not move during shipment and that the
unit has sufficient protective padding.
3.0 Operation
3.1 Ribbon Cartridge Loading
Generic ribbons may cause printer malfunctions including ribbon stalling, poor print
quality, smearing, and printhead failures. Please use Craden ribbons or carefully qualify
generic ribbons.
To replace a ribbon cartridge, do the following and refer to the drawings on page 2 and
above:
1. Depress the cabinet latches on the lower front cabinet sides and rotate the cabinet
upwards.
2. Pull the lift ring on the right side of the printer forward to lift and lock the carriage.
3. Push down the ribbon guide tabs on each side of the printhead to lower the ribbon shield.
4. Remove the old cartridge by pulling down on the top and rotate the top edge forward.
5. Guide the new ribbon behind the rubber wheel and over ribbon guide tabs. Insure the ribbon
is not twisted.
6. Mount the new ribbon cartridge bottom edge first and rotate the top edge backwards. Turn
the cartridge knob clockwise if necessary to lock the cartridge in place.
7. Turn the cartridge knob clockwise to remove the ribbon slack.
8. Push the ribbon shield up and the lift ring backward to lower the carriage. Push down on the
cartridge to insure that the carriage is fully seated.
9. Rotate the cabinet forward until the latches on both sides engage.
3
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3.2 Keypad Operation
EJECT: ejects an inserted document if the print buffer is empty. Should a document remain
partially in the printer, press eject again to fully eject paper. If ‘CLEAR EJECT
JAM” is displayed, press the CLEAR key and EJECT again.
↑A:
moves a document up 1/60" with each depression. If held depressed, the document
will slowly move into the printer. Also initiates document insertion if the printer is
configured for key rather than automatic insertion. (See 3.5.1)
↓B:
moves a document down 1/60" with each depression. If held depressed, the
document will slowly move out of the printer.
FUNCT: enters previously keyed digits as a function code. All function codes beginning with 9
are reserved for internal printer operations. All other function codes are transmitted
to the host system and their usage is host defined. If no digits have been entered,
FUNCT will override automatic alignment for one document.
CLEAR: erases any previously keyed digits before they are transmitted to the host by the
FUNCT or ENTER keys.
ENTER: transmits previously keyed digits to the host system. All responses are host defined.
This key also initiates document printing if the printer is configured to delay printing
until the ENTER key is pressed (See 3.5.1).
0 to 9:
enter digits to be transmitted to the host by the FUNCT or ENTER keys. Key
depressions appear on the lower display line.
3.3 Display Operation
The display has 2 lines of 16 characters each and is used to display messages both from the
printer and the host system.
There is a contrast knob to the left of the ribbon
instruction/configuration label that should be adjusted for maximum legibility depending on the
display viewing angle. See the printer diagram on page 43. When the printer is turned on,
"READY" will be displayed.
DP9 printers have green lamps to identify which port is active when DUAL PORT is set to Y
(see 3.5.2). The lamp labeled “A” indicates the port closest to the printer’s left side is active
and the lamp labeled “B” indicates the port closest to the printer’s right side is active.
Keypad & Display Panel
If one of the green lights is on and there is no paper in the printer, there is more print pending.
Insert paper and the printer will finish printing.
4
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3.4 Document Insertion
Document edge
guide
Insertion procedures may be customized to satisfy varied applications and user preferences.
(See the Printer Parameters in 3.5.1).
If auto alignment is enabled, gently insert the document upper left corner toward the point
where the left edge guide and the feed rollers meet. Release the document when the rollers
grip it and it will be automatically aligned and inserted to the first print line.
Auto alignment may be disabled for an individual document by pressing the FUNCT key before
insertion or for all documents by changing the SKEW CORRECT printer parameter. When
auto alignment is disabled, the left document edge should be aligned to the left edge guide
and then slid forward into the feed rollers which will insert it to the first print line.
The PAUSE printer parameter may be set to delay when the rollers activate for a few seconds
or until the A↑ key is pressed. This allows more time to insert cumbersome documents or to
train new users. With auto alignment enabled the printer should be configured for no delay.
The DOCUMENT INSERT printer parameter may be set to move the document to the last
(bottommost) rather than the first printable line.
The BEGIN PRINTING printer parameter may be set to delay printing until ENTER is pressed.
This allows the operator to insure that the document has inserted correctly. If not, it may be
EJECTed and reinserted.
3.5 Configuration
The printer may be configured from the keypad with all parameters saved in a non-volatile
memory. There are 4 configuration categories:
Configuration Category
Press
Printer Parameters
9 2 then FUNCT
9 3 then FUNCT
9 9 then FUNCT
9 4 then FUNCT
Communication Parameters
Override Parameters
Service Parameters
After accessing a category, each parameter will be displayed. Press A↑ to display the next
choice for the parameter or press ENTER to display the next parameter. If the display does not
change when A↑ is pressed, the keypad is locked. See 3.5.3 to unlock the keypad.
5
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3.5.1
Printer Parameters
Press 9 2 FUNCT to display the following parameters or press 9 0 0 FUNCT to print them on a
previously inserted document. Changes may be made as described above. Before
proceeding, see 3.4 and select the insertion sequence which best fits your application. Default
settings are indicated in bold print.
DISPLAY
REMARKS
LINES/INCH = 5 or 6
Select 5 or 6 lines per inch vertical spacing
Select 10, 12 or 17 characters per inch horizontal spacing.
CHARS/INCH = 10, 12
or 17
PRINT = DRAFT,
NORMAL or CQ
Select faster DRAFT, NORMAL, or slower but higher quality
CQ print. DRAFT should not be used on passbooks and may
degrade DP8 print quality in the rightmost printable column.
QUIET MODE = Y or N
Select Y for reduced noise on thin documents. Select N for
darker print on thick documents.
DOCUMENT INSERT =
TOP or BOTTOM EDGE
Select insertion to the TOP EDGE or BOTTOM EDGE of the
document.
DOCUMENT INSERT =
WITH X SEC PAUSE or
WITH A↑ KEY
Select automatic insertion 0, 1 or 2 seconds after placing a
document in the input tray or delay insertion until A↑ is pressed
to allow more time for aligning documents.
BEGIN PRINTING =
IMMEDIATELY or
AFTER ENTER KEY
Select to begin printing IMMEDIATELY after the document
insertion or delay printing until ENTER is pressed to verify
proper alignment.
LINE # 1 = .XXX
Select the distance, between -0.80” and 0.80”, from the
document top edge to the center of the first print line. Select
0.25” unless needing software compatibility with another
printer.
SKEW DETECTION =
CORRECT SKEW,
DETECT SKEW, or
IGNORE
Select CORRECT SKEW to automatically align skewed
documents, DETECT SKEW to detect but not align skewed
documents, or IGNORE to disable both skew detection and
correction.
SKEW DETECTION
ALLOWED = .030, .050,
.080, .110 or .130
Select the maximum skew per 4 inches of document width.
Treatment of documents with excess skew is set by the next
parameter.
IF FORM SKEWED =
ENTER/EJECT KEYS or
AUTOMATIC EJECT
If a document has excess skew, ENTER / EJECT KEYS will
continue printing if ENTER is pressed or eject the document if
EJECT is pressed. AUTOMATIC EJECT will always eject a
document with excess skew
NOTE: Many Printer Parameters may be host configured with the HT or other commands.
This allows for dynamic reconfiguration on a document by document or line by line
basis.
6
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3.5.2 Communication Parameters
Press 9 3 FUNCT to display the following Communication Parameters or press 9 0 0 FUNCT
to print them on a previously inserted document. Changes may be made as described in 3.5.
Default settings are indicated in bold.
DISPLAY
REMARKS
Select the protocol to match your system configuration (See
3.11.2). Select PARALLEL if the parallel interface option is
installed and skip the next four items.
PROTOCOL = DTR,
XON/XOF or PARALLEL
INTRF.
BAUD RATE = XXXX
WORD LENGTH = 7 or 8
PARITY = XXXX
Select 1200, 2400, 4800, 9600, 19200 or 38400 baud.
Select 7 or 8 bits/word.
Select EVEN, ODD or NO parity bit.
Select 1 or 2 stop bits.
STOP BITS = 1 or 2
INPUT BUFFER SINGLE
LINE or MULTIPLE LINE
Select a SINGLE LINE or a MULTIPLE LINE buffer of
11Kbytes.
EMULATION MODE = C, I ,
EF4565 or EF4600/EFP95
(EF emulation on DP9 only)
Select C to enable commands used with previous versions of
this printer. Other selections enable commands compatible with
popular PC based financial printers.
AUTO CARRIAGE RETURN
ON FEED = Y or N
Select Y unless compatibility with software written for another
printer is needed.
DUAL PORT = Y or N
DP9 Only. Select Y unless software cannot accept ports
alternating between enabled and disabled. If N is selected,
connect to either port but not both.
PAPER OUT = NO DOC or
NEVER
Select NO DOC for the parallel interface to indicate paper empty
whenever no document is in the printer or NEVER to never
indicate paper empty.
SELECT = DOC PRES or
ALWAYS
Select DOC PRES for the parallel interface to indicate off-line
whenever no document is in the printer or ALWAYS to always
indicate on-line.
3.5.3 Override Parameters
Press 9 9 FUNCT to display the following Override Parameters. Only trained personnel should
make changes.
DISPLAY
REMARKS
LOCKED or UNLOCKED
LOCKED allows parameters to be displayed but not changed.
UNLOCKED allows parameters to be changed with the A↑
key.
COVER OVERRIDE OFF
or ON
OFF requires the cabinet to be closed for printing to occur. ON
allows trained personnel to print with the cabinet open.
Closing the cabinet automatically sets the override OFF.
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3.5.4 Service Parameters
Press 9 4 FUNCT to display the following Service Parameters. These parameters are
factory set specifically for each printer and recorded on the configuration label behind the
display inside the printer. They do not usually need to be modified by the user.
If changes are made to these settings write the new setting on the configuration label.
CAUTION: CHANGE OF THESE PARAMETERS BY UNTRAINED PERSONNEL MAY
RESULT IN INCORRECT PRINTER OPERATION.
DISPLAY
REMARKS
TOP OFFSET = XX
Adjusts the uppermost print line location. Smaller values print
closer to the top edge.
LEFT OFFSET = XX
LEFT MARGIN = XX
Adjusts the carriage home location during document insertion.
Larger values move the carriage to the left.
Adjusts the first column print position if edge sensing is not
installed (EDGE SENSOR parameter will not appear below).
Larger values move printing to the right.
CAR. ALIGN = XX
Aligns lines printed right to left with lines printed left to right.
Larger values move right to left printed lines to the left.
FORWARD
COMPENSATION = XX
Adjusts distances moved down the document. Larger values
increase the distance moved.
REVERSE
COMPENSATION = XX
Adjusts distances moved up the document. Larger values
increase the distance moved.
EJECT HOLD OFFSET =
XX
Adjusts how much of the document is held in the feed rollers
after it is ejected. Lower values hold less of the document.
CONFIGURATION = XX
GATE OFFSET = XX
EDGE SENSOR = XX
Selects custom options. Select 00 unless indicated otherwise on
the configuration label or incorrect operation may occur.
Sets the height of the alignment gate. Larger values raise the
gate higher.
Adjusts the first column print position from the left paper edge.
Larger values move printing to the right.
NORMAL DARKNESS =
-10 to 10
Adjusts darkness at normal print speed. Lower values reduce
darkness and increase ribbon life. Select the lowest value that
provides suitable legibility on thick forms.
CQ DARKNESS = -10 to 10
PRINTHEAD TYPE
Adjusts CQ print darkness.
Only displayed in early version DP8’s with later firmware
installed. Set to match the printhead body color. Warning: A
BLACK head can be damaged if set to SILVER.
3.6 Diagnostics
3.6.1 Power Up Diagnostics
Diagnostics run automatically during power-up. If a fault is detected, ROM or RAM TEST BAD
may be displayed. If a fault occurs, press A↑ to advance to the next test. However, the printer
should not be operated.
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3.6.2 Enhanced Diagnostics
Diagnostics execute after pressing 9 0 FUNCT. If no faults exist, PROM REVISION XX, ROM
TEST OK and RAM TEST OK will display. If a fault exists, "BAD" will display until A↑ is
pressed to advance to the next test. Then SENSORS LFBMRCE will display. L is the left home
carriage sensor; F and B are the front and back document sensors, M and R are the middle
and right skew sensors, C is the cabinet open sensor and E is the document edge sensor. Any
sensor that is covered will have its corresponding indicator extinguished. Each sensor may be
activated to check for proper operation. Both operator indicator lights will turn on (DP9). Press
A↑ to conclude this test.
3.7 Self Test
Insert paper and press 9 0 0 FUNCT to print model, firmware ID and configuration settings.
3.8 Local Printing
To print several variable length lines without host commands. Proceed as follows:
1. Insert a form and then press 9 5 FUNCT.
2. In response to CHAR LENGTH = 30, key in a two digit number of characters per line and
then press ENTER. Do not print occur across a vertical fold or document edge.
3. In response to LINE COUNT = 01, key in a 2 digit number of lines.
4. Each time ENTER is pressed, that number of lines will be printed.
5. Press EJECT to eject the document and CLEAR to clear the display.
3.9 Error Conditions
3.9.1 Document Jam
In the unlikely event that a document becomes jammed in the printer, printing will stop and
"DOCUMENT JAM" will be displayed. The operator must clear the jam condition by moving
the printhead left as far as possible and removing the document from the printer.
3.9.2 Cover Open
If the cabinet is opened to replace a ribbon cartridge or clear a document jam, COVER OPEN
is displayed and printing is disabled. Printing will resume 3 seconds after the cabinet is closed.
3.9.3 Page Overflow
If the printer is commanded to move past the last printable line on a document it will eject the
document and display PAGE OVERFLOW INSERT NEXT PAGE. Printing will resume when
another document is inserted.
3.9.4 Carriage Fault
The carriage could not move to the left margin and is probably caused by a jammed carriage
or a bad left home sensor.
3.9.5 Clear Eject Jam
At power up or when an eject command is executed and all document sensors do not uncover,
“CLEAR EJECT JAM” will be displayed. Assure no document is covering the sensors and the
sensors are clean. Turn power off before manually removing a jammed document. If no
document is in the printer, this condition may be cleared by pressing the ENTER key while
powering the printer on. If the condition will not clear there may be a sensor failure.
3.9.6 Narrow Document
When a document less than 2.4” wide is inserted the middle sensor does not “see” it.
NARROW DOCUMENT” is displayed. Press ENTER to proceed or EJECT to abort.
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3.10 Programming
CAUTION: DURING PROGRAM DEVELOPMENT ALL PRINTING SHOULD BE DONE ON
SINGLE SHEET PAPER UNTIL PRINT IS CORRECTLY FORMATTED. PRINTING ACROSS
THICK FOLDS AND DOCUMENT EDGES CAN DAMAGE THE PRINTHEAD.
Two separate command sets, C and I, are selectable either from the keypad using 9 3 FUNCT
(see 3.5.2) or the interface. Mode C is compatible with previous versions of this printer while
mode I is compatible with popular PC based printers. Many commands are identical in both C
and I modes. Unique mode C commands are indicated by (C) and unique mode I commands
are indicated by (I) in the command summary table. Mode C keypad, display and status and
key buffer request commands can still be accessed in Mode I by preceding the Mode C
command with a ESC character. A Windows printer driver for an IBM Proprinter X24 may be
used but the Craden driver is preferred as it defines common transaction document widths,
provides faster throughput in landscape mode, and facilitates writing messages to the display.
3.10.1 Command Summary
ASCII
Hex
Command
ENQ
BEL
BS
HT n
05
07
08
09
Status request (use ESC ENQ in mode I)
Load upper display immediate (use ESC BEL in mode I)
Reverse line feed (C) or Backspace one character (I)
Configuration download (C) or Horizontal Tab (I)
Line feed
LF
0A
VT n
FF
0B
0C
Vertical feed (C) or Vertical Tab (I)
Eject document
CR
0D
Print buffer
SO
0E
Begin expanded characters
SI
0F
11/10
12
13/17
14
18
End expanded characters (C) or Begin 17 characters/inch print (I)
Key buffer request (use ESC DC1 or ESC DLEin mode I)
Line count request (C) or Begin 10 characters/inch print (I)
Load upper display delayed (use ESC DC3 or ESC ETB in mode I)
Master reset (C) or End expanded characters (I)
Clear the print buffer (I)
DC1/DLE
DC2
DC3/ETB
DC4
CAN
EM
19
Document length request (C)
SUB
1A
Status request delayed (use ESC SUB in mode I)
Print sideways in landscape mode
Begin double height characters (C)
End double height characters (C)
Begin (n=1) or end (n=0) underscore (I)
Feed document up #/120 inches (C)
Set 1/8 inch line spacing (I)
Set 7/72 inch line spacing (I)
Set line spacing stored by prior ESC A (I)
Set n/216 inch line spacing (I)
ESC STX
ESC SO
ESC SI
ESC - n
ESC n
ESC 0
ESC 1
ESC 2
ESC 3 n
ESC 4
ESC 5 n
ESC :
ESC A
ESC B
ESC D
ESC E
ESC F
ESC G
1B 02
1B 0E
1B 0F
1B 2D n
1B 3#
1B 30
1B 31
1B 32
1B 33 n
1B 34
1B 35 n
1B 3A
1B 41
1B 42
1B 44
1B 45
1B 46
1B 47
Eject the document (I)
Begin (n=1) or end (n=0) automatic LF after CR (I)
Begin 12 character/inch printing (I)
Begin 60 dot/inch graphics (C) or Store n/72 inch line spacing (I)
Begin 120 dot/inch graphics (C) or Set vertical tabs (I)
Set horizontal tabs (I)
Begin bold print
End bold print
Begin correspondence quality (CQ) print
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ESC H
ESC I n
ESC J n
ESC K
ESC L
ESC R
ESC S 1
ESC T
ESC W n
ESC X mn
ESC Y
ESC Z
ESC [ @
ESC [ F
ESC [ I
ESC [ J
ESC [ d
ESC [ g
ESC ]
1B 48
End correspondence quality print
Begin CQ (n=2) or normal (n=0) print
Feed document up n/216 inches
Begin 60 dot/inch graphics
Begin 120 dot/inch graphics
Set all tabs to default values (I)
Begin subscript print
1B 49 n
1B 4A n
1B 4B
1B 4C
1B 52
1B 53 01
1B 54
1B 57 n
1B 58
1B 59
1B 5A
1B 5B 40
1B 5B 46
1B 5B 49
1B 5B 4A
1B 5B 64
1B 5B 67
1B 5D
End subscript print
Begin (n=1) or end (n=0) expanded chars
Set left and right margins at columns m and n
Begin 120 dot/inch full speed graphics
Begin 240 dot/inch graphics
Begin or end double high or wide
Set skew allowance
Set character pitch
Set 1/5 inch line spacing
Set print quality
Set graphics mode
Reverse line feed
ESC d
ESC ~ C
ESC ~ I
FS
GS
RS n
1B 64
Move print position
Select Mode C
Select Mode I
Load lower display immediate (use ESC FS in mode I)
Load lower display delayed (use ESC GS in mode I)
Skip n blank spaces in print line (C)
Begin/End underscore (C)
1B 7E 43
1B 7E 49
1C
1D
1E n
US
1F
3.10.2 Document Movement Commands
Commands common to both C and I modes:
LF
moves the document up one line, with line spacing keypad selected (see 3.5.1) or
set by an HT (C mode) ESC 0,1,2 or 3 (I mode) command.
ESC J n moves the document up n/216 inches with n being a single binary coded byte.
FF or ESC 4 (I mode only) ejects the document.
ESC [ J followed by the 4 byte hex sequence 02 00 20 01 sets line spacing to 1/5 inch.
ESC ]
moves the document down one line, with spacing keypad selected (see 3.5.1) or
set by an HT (C mode) or ESC 0,1,2 or 3 (I mode) command.
ESC [ F followed by 00 02 n1
n
2
allows skew as follows: n1
n
2
= 03 00 no skew control
If n1 = 01 then n2 = 00 allows 0.05 in., 01 allows 0.08 in. 02 allows 0.11 in. and 03
allows 0.13 in. of skew
Commands unique to C mode:
VT n
moves the document a variable number of lines or steps with n being a single byte,
bit coded as 01ULCCCC (C mode only) where:
U = 1 = Up feed
U = 0 = Down feed
L = 1 = Line feed (1/6” or 1/5”)
CCCC = Line count or step count
L = 0 = Step feed (1/60”)
ESC n
BS
moves the document up (CCCC)/120 inches where n is a single byte bit coded as
0011CCCC (C mode only).
moves the document down one line, with spacing keypad selected (see 3.5.1) or
set by an HT (C mode) or ESC 0,1,2 or 3 (I mode) command.
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Commands unique to I mode:
ESC 0
ESC 1
ESC 2
sets line spacing to 1/8 inch.
sets line spacing to 7/72 inch.
sets line spacing stored by a prior ESC A n.
ESC 3 n sets line spacing to n/216 inch where n is a single binary coded byte.
ESC 5 n sets auto LF if n=1 and resets it if n=0. A line feed is automatically performed when
a CR is received if auto LF is set.
ESC A n stores lines spacing of n/72 inch with n being a single binary coded byte but the
stored line spacing will not begin until it is set by an ESC 2.
VT
moves to the next vertical tab stop or does a LF if no tabs are set.
ESC B
nnnnn0 sets up to 64 vertical tabs at each line n with each n being a single binary
coded byte and terminating with a 0 byte. ESC B 0 clears all vertical tabs.
ESC R
clears all vertical tabs and sets horizontal tabs to default values of column 9 and
every eighth column to the right.
If any document movement command (BS, LF, VT, FF, ESC n, ESC 4, ESC J n or ESC ]) has
been preceded by any printable ASCII characters, they will be printed before the movement
command is executed.
3.10.3 Print Commands
Commands common to both C and I modes:
CR
prints all preceding printable ASCII characters. There is no document feed due to
the CR unless auto LF has been set by a ESC 5 01 command and then a LF will be
performed.
SO
starts double width print. All characters received after an SO and before a SI, CR,
DC4, CAN, ESC W or feed command will be printed double width.
ESC STX Starts landscape (sideways) print for documents inserted rotated 90° clockwise.
Documents must be fed to the first printable column and 10 or 12 cpi selected
before ESC STX is issued. Following the STX is a single byte specifying the
document height in tenths of an inch. Printing will begin 0.25 inch below that
document height unless optional LF or ESC J feeds follow the document height
byte. Following the optional feeds are rows of printable characters each terminated
by a LF or ESC J. The last printable row must be terminated by an ETX (03 hex).
No commands other than LF or ESC J are allowed prior to the ETX. No more than
24 lines, each of no more than126 characters, may be printed.
ESC E
ESC F
ESC G
ESC H
starts bold, double strike print in 10 or 12 character/inch.
stops bold print.
starts correspondence quality print.
stops correspondence quality print.
ESC I n starts correspondence quality print if n=2, normal print if n=0 and draft if n=5. Draft
should not be used on passbooks. DP8 draft print quality may be degraded in the
rightmost column (column 56 @ 10 cpi or column 67 @ 12 cpi).
ESC S 1 starts half-high subscript print
ESC T
stops subscript print
ESC W n starts double width print if n=1 and stops it if n=0.
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ESC X mn sets left and right margins at columns m and n. Printing begins at column m and
must stop at column n. The document may be no wider than (n+5)/10 in. as the n
value limits carriage motion. This can increase throughput on narrow documents.
ESC [ @ followed by 04 00 00 00 m n hex selects double high and wide print. Double high
print is set if the low order nibble of m is 2 and single high is set if it is 1. Double
line feeding is set if the upper nibble of m is 2 and single line feeding is set if it is 1.
Doublewide print is set if n is 2 and single wide is set if it is 1.
ESC [ I
followed by 02 00 m n hex selects print pitches as follows:
10 cpi if m n = 00 0B, 12 cpi if m n = 01 EB, 17 cpi if m n = 01 ED
20 cpi if m n = 01 EE, 24 cpi if m n = 01 1E
Followed by 08 00 xx xx 00 m 01 00 xx xx hex selects print pitches as follows:
10 cpi if m = 90, 12 cpi if m = 78, 17 cpi if m = 54
ESC [ d followed by 01 00 n hex sets print quality to draft if 0<n<64, to normal if 63<n<128,
to CQ if 127<n<255, or to default if n=255. No change occurs if n=0. Draft should
not be used on passbooks. DP8 draft print quality may be degraded in the
rightmost column (column 56 @ 10 cpi or column 67 @ 12 cpi).
ESC d
followed by mn moves the next print position right by (256 X n + m)/120".
Commands unique to C mode:
SI
stops double width character print.
ESC SO starts double height print. All characters received before an ESC SI, CR or feed
command will be printed double height. Single height characters will be printed in
line with the top of double height characters if they are mixed in a print line.
ESC SI
RS n
stops double height print.
inserts n blank spaces into the print line and can be used to reduce the
characters transmitted when large blank spaces are to be printed. n is of the form
01NNNNNN where NNNNNN is the number of blanks to be inserted.
US
enables or disables underscoring of printable characters. All characters received
after a US and before another US, CR or feed command will be underscored.
DC4
clears all previously received data out of the buffer.
ESC ~ I
clears all previously received data and switches the interface to Mode I.
Commands unique to I mode:
BS
prints all preceding printable ASCII characters and positions the print pointer so the
next character will be printed over the last character.
moves the print pointer to the next horizontal tab to the right if one is set.
starts 17.1 character/inch printing.
HT
SI
DC2
DC4
CAN
ESC :
ESC D
stops 12 or 17.1 character/inch printing and returns to 10 cpi.
stops double width character print.
clears all previously received data out of the buffer.
starts 12 character/inch print.
nnnnn0 sets up to 28 horizontal tabs at each column n with each n being a single
binary coded byte and terminating with a 0 byte. ESC D 0 clears all horizontal tabs.
ESC R
sets all horizontal tabs to default values of column 9 and every eighth column to the
right and clears all vertical tabs.
ESC - n starts continuous underscoring if n=1 and stops it if n=0.
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ESC~C
clears all data out of the buffer and switches the interface to Mode C.
3.10.4 Low Density Graphics Commands
These commands emulate low-density graphics printed by a 9-dot printhead. New applications
should use the high-density graphics commands intended for a 24-dot printhead.
Low-density graphics may be printed at 60, 120 or 240 dots/inch (dpi) horizontally by 72 dpi
vertically. ESC K sets 60 dpi, ESC L or ESC Y set 120 dpi and ESC Z sets 240 dpi. ESC Y
prints at full speed but adjacent horizontal dots are prohibited. ESC L prints slower without this
restriction. Each command is immediately followed by m and n, a 2 byte data count indicating
that the number of following graphic data bytes is m + 256 X n. The maximum data count is
336 for ESC K, 672 for ESC L or ESC Y and 1344 for ESC Z. The high order bit of each
graphics data byte is the highest and the low order bit is the lowest of 8 vertical dots printed in
a single dot column. Each bit must be set to a 1 for the corresponding dot to be printed.
Low-density graphics may also be printed in C mode only at 60 or 120 dots/inch (dpi)
horizontally by 72 or 144 dpi vertically. ESC A must precede each line of 60 dpi data with a
maximum of 336 data bytes. ESC B must precede each line of 120 dpi data with a maximum of
672 bytes. Each line of data must be terminated by a feed command, usually a VT e. Each
data byte is of the form 1ABCDEF where A is the lowest and F is the highest of 6 vertical dots
printed in a single dot column. Each bit must be set to a 1 for the corresponding dot to be
printed.
3.10.5 High Density Graphics Commands
High density 24 dot graphics are selected by ESC [ g m n P where m + 256 X n is the
following graphics data byte count plus one and P selects graphics densities as follows:
P value:
0
1
2
8
9
10 or 11
12
Density: 60x72 120x72 120x72 60x180 120x180 180x180 360x180
P= 0, 1 and 2 are equivalent to low density ESC K, L and Y commands. P=10 prints at high
speed but adjacent horizontal dots are prohibited. P=11 prints slower without this restriction. In
the 180 dpi vertical modes, each group of 3 following graphics data bytes will be printed as one
24 dot vertical stroke where the first byte’s high order bit is the highest and the third byte’s low
order bit is the lowest of the 24 vertical dots printed.
3.10.6 Display Commands
These C mode commands may be used in I mode by preceding them with an ESC.
BEL
immediately displays the following 16 characters on the upper line of the
alphanumeric display. The characters must not be control characters and there
must be exactly 16 displayable characters
FS
loads the lower display line just like BEL loads the upper line.
DC3
or ETB operate identically to a BEL command but all previously received print and
document movement commands are executed before the upper line of the display
is loaded.
GS
loads the lower display line just like DC3 loads the upper line.
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3.10.7 Configuration Commands
HT changes the machine configuration and must be followed by 2 characters of the
form 01PVHFCS and 01LEIBDQ where:
P = 1: Permanent configuration change.
0: Change just for one document
V = 1: 5 lines/inch vertical spacing
0: 6 lines/inch vertical spacing
H = 1: 12 characters/inch horizontal spacing if S=0
0: 10 characters/inch horizontal spacing if S=0
F = not used, set to 0
C = 1: Correspondence quality print if S=0 and D=0
0: Normal print if D=0
S = 1: 17 characters/inch horizontal spacing
0: Horizontal spacing determined by H bit
L = 1: Lock keypad from modifying set up parameters
0: Unlock keypad for modifying set up parameters
E = 1: Document present set by ENTER key after insertion
0: Document present set automatically after insertion
I = 1: Insertion initiated by DOWN key
0: Start insert _ seconds after document sensed in tray
B = 1: Insertion to bottom edge
0: Insertion to top edge
D = 1: Fast Draft printing
0: Print speed determined by C bit
Q = 1: Quieter print on thin documents
0: Darker print on thick documents
All parameters configurable by an HT are also programmable from the keypad. See 3.5.1. The
HT command is unique to C mode.
3.10.8 Status and Keypad Commands
Status, key buffer contents, line count or document length data are transmitted when
requested by the host. These C mode commands except for document length and line count
requests may be used in I mode by preceding them with an ESC.
ENQ requests printer status and is executed when it is received.
SUB also requests printer status but it is only executed after all previously received
commands have been executed. SUB may be used to interrupt the host and notify it
that the printer is now idle.
Printer status is a single byte that is bit significant as follows:
0 1 DP XE DJ KB BZ BA
DP = Document present. Set whenever a document is in the feed path.
XE = Transmission error. The character associated with the error will be printed as a
“@” for parity errors or a “~” for framing errors.
DJ = Document jam. The printhead has not returned to the document edge correctly
and operator attention is required.
KB = Key buffer. The key buffer contains keystroke information that will be transmitted
upon receipt of a DC1.
BZ = Busy. Either printing or document movement is now occurring.
BA = Input buffer available. At least 1000 characters of space are available in the input
buffer or the buffer is empty. Buffer operation is detailed in 3.12.1.
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DC1 or DLE request keypad data. Upon receipt of either, all keypad input that has been
pressed since the previous DC1 or DLE will be transmitted. A maximum of 16 strokes
can be buffered. Transmitted characters will be one of the following:
ASCII
Meaning
ASCII
Meaning
0-9
:
;
Numeric keys 0-9
FUNCTion key
ENTER key
<
=
?
Either A↑ or B↓ key
EJECT key
End of buffer
The last character transmitted is always a ?. If a DC1 or DLE is received and no keys
have been pressed only a ? will be transmitted.
As numeric keys are pressed, their values are displayed on the lower display line.
Pressing ENTER or FUNCT transfers the key strokes to the key buffer. Pressing
CLEAR deletes numeric keystrokes before they are transferred to the key buffer.
Functions beginning with 9 are reserved for internal printer operation and are not
transferred to the key buffer. See 3.5 to 3.8 for the internal printer function details.
DC2 requests line count information. Upon receipt, 2 bytes are transmitted. The first byte
indicates the number of lines and the second indicates the number of additional 1/60”
steps moved since the document was initially registered at top edge or bottom edge.
EM requests document length information. Upon receipt, 2 bytes representing the document
length (if the document was automatically inserted to the bottom edge) are transmitted.
The first byte indicates the number of lines and the second byte indicates the number of
additional 1/60 inch steps.
3.11 Drivers
CRADEN SUPPLIED DRIVERS ARE THE INTELLECTUAL PROPERTY OF CRADEN
PERIPHERALS CORPORATION AND ARE PROTECTED BY COPYRIGHT LAW. THEY
MAY ONLY BE USED WITH A PRINTER MANUFACTURED BEFORE APRIL 2000 IF
ALLOWED BY A LICENSE AGREEMENT BETWEEN CRADEN AND THE USER OR THE
USER'S SUPPLIER. DUPLICATION OF ANY PART OF THE DRIVERS IS ILLEGAL
UNLESS ALLOWED BY A LICENSE AGREEMENT WITH CRADEN.
3.11.1 Installing Craden Drivers on WINDOWS 95 OR 98:
If the printer is connecting via a USB interface, first install the USB drivers.
1. Click START, Settings, Printers. Double click Add Printer
2. Select local unless the printer is not connected to this PC and click Next.
3. Click Have Disk.
4. In "Copy manufacturer's files from:" box, enter A:\w9x and click OK.
5. Select "Craden DP8" or "Craden DP9"and click Next.
6. Select the port where the printer is connected. Click Configure Port and insure that
configuration matches the printer's 9 3 FUNCT parameters. Recommended port settings are
38400-baud, 8 data bits, no parity, 1 stop bit, and hardware flow control. Corresponding 9 3
FUNCT values are DTR, 38400, 8, NONE, 1, MULT, emulation I and auto CR on feed. Click
Next.
7. Select Yes if you want the Craden printer to print all Windows output. Click Next.
8. Insert a page at least 5.8" wide and 6" high in a DP8 or 8.5 x 11” in a DP9. Click Finish to
install the driver and print a test page.
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3.11.2 Installing Craden Drivers on WINDOWS NT, 2000 OR XP:
If the printer is connecting via a USB interface, first install the USB drivers.
1. Click START, Settings, Printers. Double click Add Printer and click Next.
2. Select local or network printer (local unless the printer is not connected to this PC) and click
Next.
3. Select the port where the printer is connected. Click Next.
4. Click Have Disk.
5. In "Copy manufacturer's files from:" box, enter A:\wnt and click OK.
6. Select "Craden DP8" or "Craden DP9" and click Next.
7. Select Yes if you want the Craden printer to print all Windows output. Click Next.
8. Select Shared if the printer is to be shared over your network. Click Next.
9. Select No to not print a test page and click Finish to install the driver. On Windows 2000 and
XP a message warns that the files do not have a Microsoft digital signature. All Craden
specific files are data files that will be used by a standard Microsoft universal printer driver
and will not affect system integrity. Click Yes to continue loading.
10. Insert an 8.5" by 11" page in a DP9 or at least a 5.8" wide by 6" high in a DP8.
11. Right click on the printer icon just installed and then left click on Properties, Ports and
Configure Port. Insure that the configuration matches the printer's 9 3 FUNCT parameters.
Recommended port settings are 38400-baud, 8 data bits, no parity, 1 stop bit, and hardware
flow control. Corresponding 9 3 FUNCT values are DTR, 38400, 8, NONE, 1, MULT,
emulation I and auto CR on feed. Click OK, General and Print Test Page to print on the
installed printer.
3.11.3 Installing Craden USB Drivers on WINDOWS NT, 2000 OR XP:
1. Connect the printer to a PC USB port with a USB A-B cable. Turn on printer power. The
New Hardware Found Wizard screen will then display.
2. Click Next to display Install Hardware Device Drivers and click next to display Locate Driver
Files. Select Floppy Disk Drive and click next.
3. Click Next when Get Driver Files Search Results displays and click Finish when Completing
the Found New Hardware Wizard displays.
4. Steps 2 and 3 will now repeat and install additional drivers.
5. Click Start > Settings > Control Panel. Double click System > Hardware > Device Manager.
Double click Ports > USB Serial Port
6. Click Port Settings and select 38400 baud for DP8 or 19200 baud for DP7, 8 data bits, no
parity, 1 stop bit and hardware flow control.
7. Click Advanced to display which unused COM port will be used for all communication with
the USB interface by any program or driver capable of driving a COM port. This port number
may be changed to any other unused COM port if desired.
8. Click OK, OK, and close all open Control Panel windows.
9. To use the Craden Printer Driver, install it now per the preceding installation section and
connect it to the COM port selected in step 7.
3.11.4 Using Printer Resident Device Fonts
Printer resident device fonts should be used whenever possible because they print faster than
TrueType fonts that Windows prints as raster graphics. Device fonts include letter quality
Courier 10 and 12cpi, lower quality but faster printing Courier 5, 6, 17, 20cpi, NLQII 10cpi and
12cpi, and lowest quality, fastest printing draft 10 and 12cpi. Draft should not be used on
passbooks.
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These fonts can be selected like any other font after loading the driver and selecting the printer
as the default printer. They will print and display correctly in WYSIWIG programs like MS Word
only if a font size is selected that displays characters at their correct spacing. A font size
selection that displays characters at a smaller spacing will print slowly as the printhead
repositions to print each character closer than its nominal spacing. MS Word curiously
decreases character spacing as larger font sizes are selected. FONTTEST.DOC on the driver
disk can be opened in MS Word or Wordpad and printed to demonstrate the resident fonts.
Insure that the left margin is set to 0.2" for the fonts and display to read correctly.
3.11.5 Writing to the Printer LCD Display
The driver includes 4 pseudo-fonts that write to the printer LCD display rather than print. The
action that selects one of these fonts must be immediately followed by EXACTLY 16
characters to be displayed, without any intervening page positioning commands. All data
following the 16 characters will be printed in the font that was selected before the pseudo-font
selection. FONTTEST.DOC on the driver disk includes display writes using all 4 pseudo-fonts.
Pseudo-fonts LCD TOP DLY and LCD BOT DLY write to the top and bottom display lines only
after all previous data has printed. Pseudo-fonts LCD TOP IMM and LCD BOT IMM write to the
top and bottom display lines as soon as they are sent to the printer, even if all previous data
has not yet printed. Standard Craden display commands, ESC BEL, ESC FS, ESC DC3 and
ESC GS, can still be used by applications able to write control characters to the printer.
3.12 Interfacing
The standard interface provides RS-232 communications at 1200, 2400, 4800, 9600, 19200 or
38400 baud and has an 11 Kbyte input buffer. Characters may contain 7 or 8 data bits, even,
odd or no parity and 1 stop bit. These parameters are all keypad programmable by 9 3
FUNCT.
3.12.1 Input Buffer Operation
All data received except immediate status, display and reset commands are placed in an 11
Kbyte first-in, first-out buffer. Characters with parity errors are replaced by a "@" and framing
errors are replaced by a “~”.
The buffer may be used to receive all commands for printing an entire document. This reduces
host attention to the printer but caution must be used to determine correct recovery from
document jams and operator intervention during printing.
If a document jams in the printer, printing stops and "DOCUMENT JAM" is displayed. The next
status word transmitted will have the document jam bit set. Once notified, the host may write
recovery instructions to the display. If the transaction is to be restarted, previously transmitted
data can be destroyed by transmitting a DC4 in mode C or a CAN in mode I. The host should
request status and check the document jam bit in the status word before re-transmitting data.
The operator may also destroy the buffer contents by pressing CLEAR after removing the
document and moving the printhead to the left wall. The host must then be notified by the
operator that the transaction data may be re-transmitted.
3.12.2 Interface Protocols
Either DTR or XON/XOF protocols may be selected from the keypad. In these modes the DTR
signal will go false or a DC3 (Xmit off) will be transmitted if less than 1000 characters of space
are available in the buffer when a CR or document movement command is received.
Transmission from the host must then pause. DTR will later go true or a DC1 (Xmit on) will be
transmitted when space becomes available and host transmission may resume. DTR is
equivalent to most systems’ hardware protocol.
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3.12.3 Interface Signals & Cables
The interface provides for RS-232 communication. All signals are available on a 9 pin male
connector equivalent to Cinch DB-9P. All connectors have 4-40 threaded inserts for positive
mating. Pin assignments are as follows:
Pin Signal
Description
2
Transmit Data (TD)
Receive Data (RD)
Request to Send (RTS)
Signal Ground
Data Set Ready (DSR)
Clear To Send (CTS)
From printer, transmits printer status.
To printer, receives data & commands.
Connected to pin 6 for looping PC DTR to DSR
Attached to printer logic ground.
Connected to pin 4.
3
4
5
6
7
8
To printer, enables status transmissions.
Data Terminal Ready(DTR) From printer, indicates printer ready (and buffer available if
DTR protocol is selected).
The following cable connection will work correctly in most applications using PC type 25 or 9
pin serial ports. A shielded cable with ONLY one end of the shield connected to a metal
connector cover or pin 1 of a 25 pin connector is recommended to increase immunity to static
discharges and other electrical noise.
Printer Pin
PC-25 Pin
PC-9 Pin
Signal
3
2
6,8
5
2
3
5,6
7
3
2
6,8
5
Data to Printer
Data from Printer
DTR to PC CTS & DSR
Signal Ground
Some applications do not allow DSR to be removed when the printer is busy. Use the
following cabling with such software.
Printer Pin
PC-25 Pin
PC-9 Pin
Signal
3
2
8
-
2
3
5
3
2
8
4,6
5
Data to Printer
Data from Printer
DTR to PC CTS
PC DTR to PC DSR
Signal Ground
6,20
7
5
3.13 Problem Solving
These are the most common printer problems that can be solved by an operator. If multiple
printers are at one site, it can be useful to swap printers and cables to isolate a problem to a
printer, cable or host. Printer (92 FUNCT) and Communication (93 FUNCT) parameters should
be set the same for all printers. Service (94 FUNCT) parameters should be set per the label
inside each printer.
3.13.1 No Display or Blocks Displayed
If nothing appears on the display on power up, check that:
1. The power switch on the rear of the printer is ON.
2. The input power cord is plugged into both printer and supply outlet.
3. The contrast knob is adjusted for proper contrast.
4. The input power cord is plugged into a live supply outlet
3.13.2 Unchangeable Configuration Parameters
If configuration parameters cannot be changed with the A↑ key, the keypad is probably locked.
See 3.5.3 to unlock the keypad.
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3.13.3 No Document Motion
If a document will not advance upon insertion:
1. Press EJECT if a previous document had been manually removed without an eject
command.
2. Press A↑ if configured for DOCUMENT INSERT WITH A↑ KEY (see 3.5.1).
3. Use 9 0 FUNCT to check the front document sensor (see 3.6.2).
3.13.4 Carriage Fault or No Carriage Motion
If the carriage will not move after a document is inserted:
1. Remove the foam packing blocks from both sides of the carriage.
2. Press ENTER if configured for PRINT AFTER ENTER KEY (see 3.5.1).
3.13.5 No Printing or Light Printing
If no print noise occurs when the carriage traverses a document, check that the printhead is
plugged into the carriage flex cable. If printhead noise is present, but no or light printing
occurs:
1. Correctly install the ribbon cartridge (see 3.1).
2. Remove the cartridge and check for jammed ribbon.
3. Check that the cartridge knob rotates as the carriage traverses.
4. Check that QUIET MODE is off (see 3.5.1).
3.13.6 Ribbon Smear
If there is ribbon smear on the document and it is not very wrinkled:
1. Check for too thick a document or printing too close to a fold or edge (see 1.2).
2. Check for a displaced or missing ribbon shield.
3. Ribbon life may be increased by reducing the print darkness (see 3.5.4).
4. A generic ribbon is being used. Change to a Craden ribbon.
3.13.7 Erratic Document Feed, Mispositioning or Overprinting
If feeding is erratic or preprinted forms are not correctly positioned:
1. Check for correct LINES/INCH (see 3.5.1).
2. Check that LINE #1 is NOT set to a negative “-” number (see 3.5.1).
3. Check that all service parameters are correctly set (see 3.5.4).
3.13.8 Rollers Run at Power-Up or After Document Ejected
If the feed rollers continue to rotate when power is turned on or after a document is ejected,
blow the document sensors (near the left end of the front rollers) free of dust and debris.
3.13.9 Erratic Character Spacing or Carriage Hitting End Stops
If horizontal character spacing is erratic or forms are not correctly printed:
1. Check for correct CHARACTERS/INCH settings (see 3.5.1).
2. Check that the ribbon cartridge is seated.
3. Check that all service parameters are correctly set (see 3.5.4).
4. If the carriage shaft has any residue build-up, clean it with a soft, dry cloth.
5. With power off, check that the carriage moves freely by hand.
3.13.10 Interface Inoperative
If the printer works in self test, but won't run from the interface:
1. Check for firm mounting of the interface cable to the rear panel.
2. Check for communication parameters set identically to the host system.
3. Check for correct interface wiring (see 3.11.3).
20
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4.0 THEORY OF OPERATION
4.1 OVERVIEW
The DP8 and DP9 Printers handle a large variety of documents. The two printers are identical
except that the DP9 is 3.2” wider. The mechanism consists of a printhead, a carriage drive
assembly and a document drive assembly. The electronics consist of a switching power
supply, a Main PCB, a sensor PCB and a keypad/display assembly.
4.1.1 Carriage Drive Assembly
The carriage drive assembly positions the printhead as it prints each line of characters. The
printhead is mounted on a moveable carriage that is supported by a carriage shaft. The
carriage shaft is mounted to two pivot arms that allow the carriage to lift away from the platen
and accommodate different thickness documents. The printhead is held against the document
by the carriage shaft weight and springs. The carriage is lifted by a roller that rides across the
document surface and maintains a constant printhead to document gap, thereby maintaining
print quality across a wide document thickness range. An upper shaft stops the carriage from
rotating around the carriage shaft.
A toothed belt clamped to the carriage is driven by a pulley mounted on the carriage stepper
motor located on the left side of the metal box. The stepper motor moves the printhead in
1/120th of an inch increments along the print line. Position information is updated when the
carriage is detected by an optical sensor on the Sensor PCB.
The ribbon cartridge is driven by a shaft which is in turn driven from the carriage motor shaft
through a gear train which pivots so that the ribbon drive shaft rotates clockwise regardless of
the direction of carriage motor rotation. The entire carriage drive assembly lifts away from the
document drive and the ribbon shield and ribbon guides mounted to the carriage lower away
from the printhead for easy access to the ribbon path when replacing cartridges.
4.1.2 Document Drive Assembly
The document drive assembly positions inserted documents. The document drive stepper
motor mounted on the right side of the document drive is connected to the two drive rollers
through toothed belts. A pinch roller is spring loaded against each drive roller providing friction
feed for documents of varying thickness. Documents are fed between the drive and pinch
rollers, with the spring-loaded pinch roller automatically adjusting to the document thickness.
The stepper motor positions in 1/120th of an inch increments.
The presence of a document in the input tray is sensed by the frontmost of four optical sensors
located above the document path. When auto alignment is active a gate is raised across the
document path during document insertion. At that time the printhead moves past its normal left
home position, activating an arm that raises the gate. The rising gate reduces the spring
loading force on the front document drive rollers, allowing documents to rotate and align
against the gate. Three optical sensors in line behind the front rollers check the leading
document edge to insure that it is sensed within a programmable alignment tolerance. These
sensors are also used to position the top or bottom edge of the document relative to the
printhead. After alignment is verified, the printhead moves to the right, lowering the gate out of
the document path and restoring normal loading force to the document drive rollers.
4.1.3 Switching Power Supply
The switching power supply is mounted to the inner front surface of the metal box. AC line
voltage is wired through a power switch to the power supply. The power supply provides
regulated +38VDC to the Main Printed Circuit Board.
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4.1.4 Main Printed Circuit Board
The Main PCB is located in the rear of the printer and contains power supply, control and
driver electronics. The regulated +38VDC is converted to +5VDC, +12VDC and –12VDC by a
switching regulator on the main PCB. The +38VDC drives the printhead and stepper motors.
The control electronics are based on a 68HC12 microcontroller, a 128 Kbyte flash memory and
32Kbyte RAM. The microcontroller contains a 16-bit microprocessor, non-volatile EEPROM,
timers, serial I/O communication ports and baud rate generator, multiple parallel ports and an
A/D converter driven by the optical sensors. The main PCB also contains circuitry for
interfacing to the keyboard/display assembly, driving the printhead and stepper motors and
providing signal level conversion for the serial interface signals. The driver electronics include
switching transistors that drive the printhead and 4 H-Bridge switching regulators that drive the
carriage and document drive stepper motors. An optical sensor mounted on the main PCB
detects opening of the cabinet.
4.1.5 Keypad/Display Assembly
The keyboard/display assembly consists of a 16 key keypad arranged in a 8 x 2 scanning
matrix and a 2 line by 16 character dot matrix LCD display module. The display buffers 32
characters of data and generates the dot patterns and timing to drive the LCD.
4.2 ELECTRONICS IN DETAIL - Refer to #72135 Schematic
4.2.1 Low Voltage Supplies
The +38VDC supplied from the switching power supply is converted to +5VDC, +12VDC and –
12VDC by switching regulator V1 (or alternate V2) using Schottky diode D31 and a small cube
switching transformer. The 100KHz switching frequency is set by C19 & R38. The +5VDC is
monitored by Q3 so that the electronics are held reset if the +5VDC is not stable.
4.2.2 Microprocessor System
The 68HC12 microcontroller U10 has a 250 nanosecond cycle time that it generates from
16Mhz crystal Y1. Each cycle the 68HC12 provides a timing pulse on TP1 for synchronizing
the devices on the data bus and updates the address on pins A0-A18. The high order address
lines are decoded by the 68HC12 to generate chip selects to the RAM and flash memory.
The 32 KByte RAM U9 is selected by U9 pin 20. The RAM provides workspace and buffer
memory for the 68HC12. All printer, communication and service configuration parameters are
stored in EEPROM internal to the 68HC12. The128 KByte flash memory U8 is selected by U8
pin 22. This memory contains the dot patterns for all printable characters and all programs that
the 68HC12 executes to control the printer.
4.2.3 Stepper Motor Drivers
Each stepper motor has 2 stator coils, each driven by a 3718 driver U1, 2, 6 and 7. Each 3718
contains 4 transistors arranged in a H-Bridge that can apply +38 VDC to either end of the coil,
a 25KHz switching oscillator and comparators that limit the coil current by sensing the voltage
on an external resistor R4, 6, 29 or 32. Each 3718 is controlled by 3 signals driven from the
68HC12: a phase signal which indicates which direction current is to flow through the coil and
two signals which limit the current to 0, 20, 60 or 100% of a maximum value determined by the
external resistor. 0% is used to turn off a winding, 20% is used when the motor is holding a
fixed position and 60 or 100% is used when the motor is rotating. See Figure 4-1 for typical
voltage waveforms on both ends of a motor coil and the external resistor. The ground plane
under the 4 3718's is connected to the rear panel heat sink to reduce the temperature rise.
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Motor rotation occurs by sequentially changing the phase and current signals to the two motor
coils. Motor speed is controlled by how rapidly the signals are changed. Following is a state
table where each state change rotates the document motor rotor 1/400 of a revolution (1/120"
of document motion) and there are 8 distinct states before the pattern repeats. Direction of
motor rotation can be reversed by moving up rather than down through the state table. The 2
motor windings are labeled Phase A and Phase B and the phase and 2 current level signals for
each winding are shown. The state table for the carriage motor is similar but the states with 0%
current are skipped so each state change rotates the carriage motor rotor 1/200 of a revolution
(1/120" of carriage motion).
Phase A I0A I1A Phase B I0B I1B
A Current
B Current
1
1
1
0
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
0
1
1
0
0
0
0
1
1
1
0
1
0
0
0
1
0
0
0
1
0
0
0
1
0
0
100% Forward 100% Forward <--
100% Forward
0% Reverse
|
|
|
|
|
|
100% Forward 100% Reverse
0% Reverse 100% Reverse
100% Reverse 100% Reverse
100% Reverse
100% Reverse 100% Forward
0% Forward
0% Forward 100% Forward ---
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+38V
A
Phase
3718
I
0
current
current
Phase
Control
Current
Control
I
1
D
C
VREF
One
Shot
Comp.
B
R4 Typ
0
≈ 2.7 mSec
≈ 5.5 mSec
5v
0v
U20 - 15
A
0.4v
0.0v
B
R4
38v
0v
J2 - 1
C
D
38v
0v
J2 – 3
Fig. 4.1 Stepper Motor Drive Circuit
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4.2.4 Printhead Drivers
During printing, 24 bits of print dot data are serially shifted into U3 to U5. A FIRE pulse at U5
pin 12 then transfers the 24 bits to the U3 to U5 outputs. Each high bit turns on a printwire by
turning on power MOSFETS Q10 to 33. Timer U13 applies +38VDC to the other side of all
printwire coils via Q5 and power MOSFET Q7.
After about 100 usec. the NO CHOP signal at D35 cathode goes high and timer U13 pin 3
begins to oscillate as an open-loop switching regulator to keep the current level in the
printhead coils relatively constant. 100 to 200 usec. later the FIRE signal at D34 anode goes
high which turns off U13 and Q7. On pre-revision F boards, FIRE also cleared the printwire bits
from U3 to U5, turning off all transistors and discharging the coil current through D6, the coils,
and diodes D7 to 30. The FIRE-EXT signal at the base of Q4 enabled a discharge path
through Q8 back to +38VDC for about 40 usec. Then Q8 turned off and the remaining coil
current dissipated through Q10 to 33. On revision F and later boards, the printwire bits remain
set until 320 usec after FIRE began and Q8 has been jumpered to provide a direct connection
between diodes D7 to 30 and +38VDC. See Figure 4-2 for typical waveforms.
4.2.5 Keypad and Display (Refer to Schematic #72135)
The keypad switches are arranged in a 8 by 2 X-Y grid. KEYSCAN0 and KEYSCAN1 at J11
pins 12 & 11 drive the grid rows and the grid columns are read into the 68HC12 on KEYBD0
through KEYBD7 at J11 pins 3 through 10.
The display is a 2 line by 16-character liquid crystal display (LCD) with integral electronics.
When the 68HC12 is ready to display data, it reads status from the LCD and if the LCD is
ready to accept data, the 68HC12 writes ASCII characters to the LCD. The LCD then
generates and displays the corresponding character patterns.
4.2.6 Sensors
Seven optical reflective sensors are used: the left home sensor for carriage position, four
document sensors for document presence, alignment and position, one document edge sensor
located on the carriage, and the cabinet open sensor on the main PCB. All sensors operate in
the same way: a constant current is provided to the sensor’s light emitting diode (LED) through
a resistor to +5 volts. If an object (carriage, document or cover) reflects the LED light onto the
corresponding phototransistor, the transistor turns on, raising its emitter voltage to 2 to 4 VDC.
The 68HC12 reads and digitizes the phototransistor emitter outputs via an internal A/D
converter.
4.2.7 Character Printing
The carriage motor steps the carriage in 1/120" increments but dots can be printed three times
per increment. Printing at 10 characters per inch (cpi) uses a 13 wide X 23 high character
matrix. 13 dots are used for printing a character and 5 dots for the intercharacter space.
Printing at 12 cpi uses a 11 X 23 matrix with 11 dots used for printing and 4 for spacing.
Printing at 17.1 cpi uses a 7 X 23 matrix with 7 dots used for printing and 3.5 for spacing. At
correspondence quality (CQ) speed half increment printing is used to double the horizontal
resolution and the matrix doubles to 25 X 23 for 10 cpi and 19 X 23 for 12 cpi.
At all print speeds only every other dot position can be printed so the maximum number of
horizontal dots printed is 4 for a 7 wide matrix, 6 for an 11 wide, 7 for a 13 wide, 10 for a 19
wide and 13 for a 25 wide matrix. In all print modes the upper 19 printwires are used for
printing normal characters, the 20th through 23rd wires for lower case descenders and the 24th
wire for underlining. Printing occurs at a maximum frequency of 1,350 Hz.
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12
Q26 TYP.
FIRE
RCLK
D
S
U5
D23 TYP.
10
15
SRCLR Q
NO CHOP
C
O
I
Q8
+38VDC
D
S
L
Q4
Q7
FIRE EXT
D
S
D34
D35
Q5
U13
Timer
3
6
U12
D6
FIRE
NO CHOP
FIRE EXT
U5 PIN 15
U13 PIN 3
-- 38V
Q7 SOURCE
Q26 DRAIN
-- 70V
50V --
COIL
CURRENT
Fig. 4.2 Printhead Drive Circuit
(dashed lines are for revision F and later boards)
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5.0 MAINTENANCE
5.1 LUBRICATION AND CLEANING
5.1.1 Lubrication
There are no lubrication points in the printer. All parts are either permanently lubricated or are
designed to operate dry. No lubricants should be used. They may adversely affect operation.
5.1.2 Document Feed Roller Cleaning
1. Open the cabinet.
2. Moisten a lint-free cloth with isopropyl alcohol and wipe the front rollers while rotating the
gear on the end of the roller shaft. Do not use any strong solvents in place of alcohol.
3. In similar fashion, clean the rear rollers. Make sure all rollers are dry and free of residue.
5.1.3 Sensor Cleaning
Clear sensor light paths of paper, paper dust and other obstructions if rollers continue to run
when no document is present or other sensor problems occur.
L - Left (Home) Sensor – synchronizes carriage motion
Input Guide
B -
Back
Sensor
M -
Middle
Sensor
R -
Right
Sensor
MultiSensor
Cable
F -
Front
Sensor
Must be
seated in
connector
properly
Senses
document
top edge
Detects
skew
Detects
skew
Senses
document
insertion
1. Insert the flexible nozzle tube of a compressed air can under the input guide and near each
of the document sensors. Clear each sensor area with a 5-second burst of air.
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5.1.4 Printhead Cleaning
Perform if printwires stick when printing begins or print quality becomes intermittent. Be sure to
check the ribbon first! The 73297-8 Printer Cleaning Kit contains all necessary tools.
1. Open the cabinet and remove the ribbon cartridge.
2. Remove the printhead attachment screw.
3. Disconnect the printhead from the printhead flex cables.
4. Clean the tip of the printhead nose where the printwires extend from the printhead with an
alcohol wetted napkin. Remove all ink and bits of ribbon fabric lint.
5. Use the blunt end of a printhead cleaning brush to remove the bulk of the grease packed
around the printwires. Then wet the brush end with alcohol to remove the rest of the grease
from the printwires. Wipe the grease, ink and ribbon fabric “lint” from the brush onto the
napkin provided. Remove all residual alcohol
6. Reconnect the printhead to the flex cables and remount the printhead. Insure that the flex
cables don’t touch the carriage belt drive pulley or idler pulley bracket when the carriage
approaches the left and right box flanges.
7. Reinstall the ribbon cartridge. Perform a test print.
Printhead attachment screw
5.1.5 Document Print Area Cleaning
Accumulated paper dust should occasionally be removed from the platen, printhead, carriage
shaft, feed rollers, document sensors and other document path areas with brush, vacuum or
compressed air.
5.1.6 Cabinet Exterior Cleaning
The cabinet can be cleaned with a damp cloth and a mild, liquid soap or detergent. Do not use
harsh, abrasive cleaners.
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5.2 SERVICE PARAMETER SET-UP PROCEDURE
It may be necessary to change service parameters that compensate for certain mechanical
tolerances. These parameters are listed on a label inside the printer and may be changed if
necessary by 94 FUNCT(see 3.5.4). If mechanical parts are replaced some parameters may
have to be reset. New parameter values should be marked on the configuration label.
The service parameters are determined by using 95 FUNCT local print and either 955 and 944
FUNCT or just 943 FUNCT as described below. Parameter values are changed with the A↑
and B↓ keys. After changing a parameter, use 95, and either 955 and 944 or just 943, to obtain
new print samples. Re-measure all distances and re-adjust if necessary.
TOP OFFSET is set so the distance from the top document edge to the center of the first line
printed by 95 FUNCT is located as specified by LINE #1 = .XXX (.250 is the default factory
setting) under 92 FUNCT.
LEFT OFFSET is set so the carriage can still move leftward from its home position 0.01" to
0.02" (0.3 to 0.5mm) before it contacts the gate arm that raises the alignment gate.
LEFT MARGIN is set so the distance from the left document edge to the left edge of the first
character printed by 95 FUNCT is 0.20" (5.1mm) if edge sensing is not installed (EDGE
SENSOR parameter will not appear below).
CAR ALIGN is set so either the vertical strokes of H’s printed by 955 FUNCT (firmware E9 and
earlier) from right to left align with those printed left to right or the zeros printed by 943 FUNCT
(firmware EA and later) align. See 5.4.2 for precise adjustment but do not change the belt
tension unless necessary.
FORWARD and REVERSE COMPENSATION are set using either 943 or 944 FUNCT:
a. Procedure for firmware E9 and earlier (see 3.7)
944 FUNCT prints lines of overlapping X's and O’s 10" apart.
Set FORWARD COMPENSATION so that the distance between lines of X's is 10.00"
(254mm) +/- 0.02” (0.5mm)
Set REVERSE COMPENSATION so that the line of O's printed at the top of the page
overlaps the line of X's within 0.02” (0.5mm).
b. Procedure for firmware EA and later (see 3.7)
943 FUNCT prints line pairs with values of –4 through +4.
Set both FORWARD and REVERSE COMPENSATION with the value whose line pair is
closest to 10.00" (254mm) +/- 0.02” (0.5mm)
EJECT HOLD OFFSET is set so that an ejected document is still held in the drive rollers but
can be removed by pulling gently on it.
CONFIGURATION selects certain custom operating features and should not be set to a value
other than shown on the configuration label without contacting the factory.
GATE OFFSET is set by the Auto Alignment Gate Height procedure (see 5.4.7)
EDGE SENSOR is set so the distance from the left document edge to the left edge of the first
character printed by 95 FUNCT is 0.20" (5.1mm). This parameter is available on DP8 serial
number 182057 and higher and DP9 serial number 293501 and higher.
NORMAL DARKNESS Lower values reduce darkness and increase ribbon life at normal print
speed. Select the lowest value that provides suitable legibility on thick forms.
CQ DARKNESS similarly controls darkness at correspondence quality print speed.
PRINTHEAD TYPE (early DP8 only) adjusts print pulse timing for two different printheads that
have different drive characteristics. Select AUTO DETECT unless serial number is below
81000. Then select BLACK or SILVER printhead body color. A BLACK head can be damaged
if set to SILVER.
5.3 ELECTRICAL ADJUSTMENTS
There are no electrical adjustments required.
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5.4 MECHANICAL ADJUSTMENTS
5.4.1 Printhead Gap
Too large a gap causes light print and missing dots. Too small a gap causes ribbon smear.
1. Open the cabinet, raise the carriage with the lift ring and remove the ribbon cartridge.
2. Hold the ribbon shield at its corners between the shield face and shield base. Raise the
ribbon guide plate and push the shield down and slide it to the right side to remove it.
3. Lower the carriage. Insert a narrow .015" (.38 mm) feeler gauge between the platen (printing
surface) and printhead nose from the side of the printhead. Insure that the feeler is flat
against the platen and completely under the printwires (not under the gap wheel or behind
the printwires). The .015" feeler should just fit without raising the printhead but a slight
resistance should be felt as the feeler slides below the printwires.
4. If the gap is incorrect, slightly loosen the two larger head screws on either side of the
printhead that fasten the gap plate to the printhead. (Use a 5/16” wrench to hold the
mounting nuts). The gap changes as these screws are loosened so only loosen them
enough to be able to move the plate.
5. Decrease the gap by pushing the printhead down against the feeler. Increase the gap by
rotating a screwdriver blade in the slot between the gap plate and the printhead Insure that
the gap plate is centered around the printhead nose and tighten the screws. Recheck the
gap per step 4.
6. Replace the ribbon shield by raising the carriage, sliding the shield from the side between
the carriage and the ribbon guide plate until the shield slot is centered. Gently push the
shield up until it snaps into place.
7. Mount the ribbon and use 95 FUNCT to print (See 3.8) and check print quality. Adjust the
NORMAL and CQ DARKNESS parameters (see 5.2).
Insert the feeler gauge from the side of the printhead. Be sure
the feeler gauge passes under the printwires only. (Front roller
and input guide removed for clarity)
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5.4.1.1 Ribbon Shield Removal / Replacement
The ribbon shield prevents ribbon fabric from rubbing on and smearing printed media. It is a
consumable. Replace the shield every four to five ribbon replacements or when it is damaged.
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5.4.1.1.1 Ribbon Shield Face Inspection
A high percentage of printers sent to Craden for repair has a ribbon shield that has reached end of
life and is the primary cause of the printer’s problem. Document jams, damaged documents,
streaking, poor print quality, and document skewing can often be alleviated by replacing ribbon
shields after four to five ribbon replacements. Below is a guide to assist in ribbon shield inspection.
New ribbon shield. Face is smooth, no
defects
Ribbon shield at end of life. Face is
scored. There is no visible damage to
the six-sided opening but a breech is
imminent. This shield may begin to
snag documents.
Damaged ribbon shield. There is a
breech in the six-sided opening. This
ribbon shield will streak and tear
documents.
Damaged ribbon shield. One side of the
six-sided opening is missing. This
ribbon shield will streak and tear every
document and may scratch the platen.
The angle between the face and base
(back) of the ribbon shield must be
perpendicular. Ribbon shields are made
of thin stainless steel and if bent can
cause poor print quality or snag the
ribbon fabric.
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5.4.2 Carriage Drive Belt Tension
The carriage belt connects the carriage drive motor to the carriage. Incorrect carriage belt
tension can cause uneven character width and spacing, poor bi-directional print alignment,
stalling and premature belt wear. Tension is adjusted with the screw fastening the carriage belt
idler pulley bracket to the right box flange.
1. Loosen the adjustment screw until the upper belt run can be pushed down against the lower
belt run at the center of the printer with about 1 lb. (400g) of force.
2.a. Procedure for firmware ‘E9' and earlier (see 3.7)
Use 955 FUNCT to print 4 lines of H’s. Increase the belt tension by turning the adjustment
screw 1/2 turn clockwise and press ENTER to print 4 more lines. Adjust belt tension and
print as required. Select the loosest belt tension that gives good alignment of characters. If
no setting gives good alignment, adjust the CAR ALIGN parameter (see 5.2) and then
repeat this procedure.
b. Procedure for printers with firmware ‘EA’ and later (see 3.7)
Use 943 function to print 6 lines of double-high double-wide zeros and select the best line
of aligned characters. If none are desirable, increase the belt tension by turning the
adjustment screw 1/2 turn clockwise and print using 943 FUNCT again. Select the loosest
belt tension that gives good alignment of zeros. Press 94 FUNCT and ENTER 4 times.
The display will read “CAR. ALIGN =” Use A↑ or B↓ to enter the value printed at the end
of the selected line of printed zeros.
5.4.3 Document Drive Belt Tension
The document drive belt connects the document motor to the rear document roller. Incorrect
document belt tension causes uneven line spacing and document drive stalling.
1. Use a spring gauge to deflect the center of the document drive belt. Adjust only if an 8 oz.
(225 gm.) force deflects the belt less than 0.02” (0.5 mm) or more than 0.04” (1 mm).
2. Loosen the 4 screws that fasten the document drive motor.
3. Move the motor toward or away from the rear document drive roller to adjust the tension and
tighten the screws. Repeat step 1.
5.4.4 Carriage Shaft Cam and Shaft Rack
The carriage shaft cam sets the carriage shaft height so that the gap wheel rises very slightly
when the carriage moves onto the right platen end. Light printing can occur if the carriage shaft
is too high. Document snagging or irregular movement of wide documents can occur if the
shaft is too low.
1. Move the carriage to the printer center and raise the carriage while holding the box down.
2. If both carriage shaft ends don’t touch the top of the slots in the box flanges, reposition the
shaft by pushing the higher shaft end down while raising the lower shaft end.
3. Check that the rubber wheel is in firm contact with the platen when the carriage is at the left
and right platen ends.
4. Check that the carriage rises about 0.010 (0.25mm) as the carriage moves from its
rightmost position onto the right platen end.
5. If this does not occur, loosen the shaft cam screw on the right box flange and rotate the
cam. Hold the cam with a small screwdriver blade in the rectangular slot when tightening the
screw to stop the cam from rotating.
6. Do a test print to insure that print darkness does not vary between the left and right sides.
5.4.5 Rear Document Roller Spring Force
The rear document roller springs are formed wires that pull the rear upper document rollers
against the lower rollers. The springs are adjusted by raising or lowering the cams mounted on
the front screws fastening the side plates to the platen. Incorrect spring force can cause
document skewing, slipping or stalling.
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1. Use a spring gauge to measure the force required to raise the right end of the rear upper
roller very slightly. It should measure 6 to 8 ounces (170 to 225 gm).
2. If necessary, adjust this force by loosening the roller spring cam screw on the right side
plate and raising or lowering the cam.
3. Repeat steps 2 & 3 on the left end of the rear upper roller.
5.4.6 Auto Alignment Gate Ramp
The gate ramp is properly adjusted if the screws that mount the roller springs to the gate have
about 0.02” (0.5mm) clearance to the bottom of the side plate slots when the gate arm is at
rest against the left side plate stop. Field adjustment is usually unnecessary. If it is necessary:
1. Insert a long 3/32 Allen wrench through the slot in the input tray and loosen the ramp
adjustment screw. The input tray may be removed by removing 3 screws from the baseplate
if you are unable to locate the ramp screw through the input tray slot.
2. Hold the ramp arm against the stop on the left side plate and move the ramp adjustment
screw toward the left until the gate just begins to rise. Tighten the screw in this position
Ramp Adjustment Screw
Ramp Arm
Ramp
Move ramp this way to
raise gate
Move ramp this way to
lower gate
View: Ramp arm from front of printer with input tray removed
5.4.7 Auto Alignment Gate Height
The gate ramp must be properly adjusted (see 5.4.6) before gate height is adjusted.
1. Raise the gate by pressing 9 4 7 FUNCT A↑.
2. Press FUNCT to adjust gate height. The gate fingers should be as close as possible (within
0.02” or 0.5mm) to the input guide without touching it. Each press of A↑ will slightly raise the
gate and each press of B↓ will slightly lower the gate. When the gate is at the correct height,
press ENTER.
3. Press B↓ to lower the gate and then press A↑ to check for correct gate height. Press B↓ to
lower the gate and CLEAR to exit the test.
Roller Segments
Input Guide
Roller Shaft
Gate fingers
Looking into the document drive. Input tray removed for clarity. Gate in “up” position
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5.4.8 Front Document Roller Spring Force
Gate travel must be properly adjusted (see 5.4.7) before roller spring force is adjusted
1. Raise the gate by pressing 9 4 7 FUNCT ↑A.
2. Rotate a lower drive gear to manually feed an ½” wide strip of the thinnest paper used
(usually a receipt copy) under the rightmost front upper roller segment.
3. Adjust the right side roller spring tensioning screw so there is a very light drag from the roller
on the paper while rotating a lower drive gear. Clockwise adjustment increases drag.
4. Repeat steps 2 and 3 for the leftmost roller segment and the roller spring tensioning screw
on the left side plate.
Roller spring tensioning screw (2)
5.4.9 Auto Alignment Skew Sensor Calibration
This procedure calibrates the relative position of the 3 skew sensors with a known square
document
1. Press 9 4 6 FUNCT to display “Skew Calibration”.
2. Insert a document with known square top and left edges. If the document inserts straight
and its top edge is parallel to the input guide edge, press ENTER to calibrate the skew
sensors and exit. If the document did not insert perfectly, press EJECT and insert again.
5.5 REPLACEMENT PROCEDURES
5.5.1 Cabinet
1. Turn off power
2. Insert a small flat screwdriver blade in the slot in the middle of the rear cabinet edge and pull
down to flex and remove the hinge wire that fastens the cabinet to the mechanism.
3. Press the cabinet latches and lift off the cabinet.
4. To install the cabinet, raise the rear panel heatsink and place the cabinet on the baseplate
so that the latches fasten. Insert one end of the hinge wire through the box flange and into
the cabinet hinge plate. Flex the wire and insert the other end through the other box flange
and hinge plate so that the wire snaps straight.
5.5.2 Main PCB
1. Record all FUNCT 92 and 93 parameters so the new PCB can be configured correctly.
2. Disconnect the interface cable and remove the cabinet (See 5.5.1)
3. Disconnect the following cables from the Main PCB:
J1
J2
DC power
document motor
J11 keypad
J12 display
J3&4 printhead
J13 edge sensor (if installed)
J15 home & document sensors
J17 parallel port (if installed)
J5
J9
document motor
DP9 dual port
4. Remove the 5 screws fastening the Main PCB to the rear panel heatsink.
5. To replace the PCB, reverse the procedure in steps 2 to 4. Insure that the spacers remain
on each mounting boss and that the 4 screws are tight. Use the longer screw to fasten the
transistor and finned heatsink.
6. Reconfigure the new PCB with the FUNCT 92 and 93 parameters recorded in step 1 and the
FUNCT 94 parameters listed on the configuration label.
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5.5.3 Sensor PCB
1. Turn off power and disconnect the flex cable from the sensor PCB.
3. Remove the two nuts fastening the PCB to the input guide.
4. Raise the upper front roller and remove the PCB by pushing it to the rear.
5. Install the lower (thick) sensor insulator, the new PCB and the upper (thin) sensor insulator.
6. Push the PCB and insulators forward, fasten the nuts and reconnect the flex cable.
7. Adjust TOP, LEFT OFFSET, LEFT MARGIN and EJECT HOLD parameters so that inserted
documents are correctly positioned (See 5.2). Record new values on the parameter label.
8. Calibrate the skew sensor (See 5.4.9).
5.5.4 Keypad
1. Turn off power and remove the cabinet (See 5.5.1).
2. Place the mechanism upside down so it rests on the box and keypad bracket.
3. Remove the nuts fastening the keypad to the bracket.
4. Disconnect the flex cable and remove the keypad.
5. To install a new keypad reverse the procedure in steps 1 to 4
5.5.5 Display
1. Turn off power and remove the cabinet (See 5.5.1).
2. Place the mechanism upside down so it rests on the box and keypad bracket.
3. Remove the nuts fastening the display to the bracket.
4. Pull the flex cable connector cover away from the connector to disconnect the flex cable.
5. To install a new display reverse the procedure in steps 1 to 4
5.5.6 Power Supply PCB
1. Disconnect the AC power cord and remove the cabinet (see 5.5.1)
2. Raise the insulator flap covering the Power Supply PCB and disconnect the AC and DC
connectors from the PCB.
3. Remove the 4 screws fastening the PCB to the box and remove the PCB.
4. Position the mechanism so that it rests on the keypad bracket and input tray.
5. Put the screws into the new PCB.
6. Insure that the insulator stays located around each mounting boss while mounting the new
PCB and fasten the screws.
7. Reconnect the AC and DC connectors (the AC connector mounts to the end of the header
labeled “L” on the PCB).
8. Insure that the insulator flap separates the power supply from the flex cables.
5.5.7 Carriage Motor
1. Remove the cabinet (see 5.5.1).
2. Disconnect the carriage motor from J5 of the Main PCB.
3. Remove 3 screws from the motor (shaft side) that fasten it to the box. Guide the carriage
belt off the motor pulley (do not loosen the belt tensioner or you will have to readjust it) and
remove the motor.
4. Transfer the motor pulley to the new motor. Leave a .01" (0.2mm) gap between the pulley
hub and the motor flange.
5. Install the new motor in the box, onto the carriage drive belt, and fasten with the 3 screws.
6. Connect the motor to J5 on the Main PCB and replace the cabinet.
7. Set the LEFT HOME, LEFT MARGIN and CAR ALIGN parameters (see 5.2).
8. Tension the carriage belt (see 5.4.2).
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5.5.8 Document Motor
1. Remove the cabinet (see 5.5.1).
2. Disconnect the motor from J2 on the Main PCB.
3. Loosen the 1/16” Allen screw that fastens the document drive pulley to the motor shaft
4. Remove the motor mounting screws. Remove the drive pulley through the motor clearance
hole in the right box wall and remove the motor from the side plate.
5. Install the new motor (leads exiting from the bottom) through the side plate and onto the
drive pulley and belt. It is easiest to replace the motor mounting screws by holding them with
pliers between the side plate and box wall and then fastening them with a screwdriver
inserted through holes in the box wall.
6. Locate the drive pulley so it is in line with the driven pulley and fasten it to the motor shaft.
7. Tension the belt (see 5.4.3).
8. Connect the motor to J2 on the Main PCB and replace the cabinet.
5.5.9 Printhead
1. If a black bodied printhead is to be installed in a DP8, run 9 0 FUNCT to display the firmware
revision which MUST be C1 or greater. A DP8 with A or B series firmware MUST be
upgraded to at least C1 before a black bodied printhead can be used.
2. Open the cabinet, raise the carriage with the lift ring and remove the ribbon cartridge.
3. Hold the ribbon shield at its corners between the shield face and shield base. Raise the
ribbon guide plate and push the shield down and slide it to the right side to remove it. See
picture in 5.4.1
4. Remove the printhead attachment screw. See picture in 5.1.4.
5. Disconnect the printhead from the printhead flex cables.
6. Connect the new printhead to the flex cables and remount it. Insure that the flex cables don’t
touch the carriage belt drive pulley or idler pulley bracket when the carriage approaches the
left and right box flanges.
7. If possible, reset the printhead gap (see 5.4.1).
8. Replace the ribbon shield and cartridge.
9. For DP8’s only, run 9 4 FUNCT. If the PRINTHEAD TYPE parameter appears after CQ
DARKNESS, set it to match the printhead body color. A BLACK head can be damaged if set
to SILVER.
10. Adjust LEFT OFFSET, NORMAL and CQ DARKNESS (see 5.2).
5.5.10 Carriage Drive Belt
1. Loosen the screw fastening the belt clamp to the carriage and remove the belt clamp.
2. Remove the screw fastening the carriage belt idler pulley to the right box flange. The belt
and idler pulley are replaced as an assembly.
3. Install the new belt and clamp it to the carriage.
4. Tension the carriage belt (see 5.4.2).
5. Set the LEFT OFFSET, LEFT MARGIN and CAR ALIGN parameters (see 5.2).
5.5.11 Document Drive Belt
1. Loosen the document motor mounting screws and push the motor toward the drive rollers.
2. Slide the belt off the rear roller pulley and remove the belt.
3. Install the new belt through the motor clearance hole in the right box wall and re-tension the
belt (see 5.4.3).
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5.6 TROUBLESHOOTING
5.6.1 Basic Troubleshooting Procedure
This procedure exercises everything in the printer except the interface to the host system. If any step
is not successfully executed, refer to the corresponding troubleshooting section.
1. Turn on printer power.
A) If nothing appears on the display, see 5.6.2.
B) If <
> BAD is displayed, replace the indicated component on the main PCB or the
complete main PCB.
C) If CARRIAGE FAULT is displayed, see 5.6.6.
2. Press 12345678 and then CLEAR. Each number should appear in the display and then all
should disappear. If this does not occur or if diagnostics don't begin to execute in the next
step, see 5.6.3.
3. Execute 90 FUNCT diagnostics (see 3.6.2) and exercise the 7 sensors. If any sensor does
not operate, see 5.6.4.
4. Execute Local Printing (see 3.8) and use a 6" x 11" document.
A) If a document will not load into the printer, see 5.6.5.
B) If the carriage will not move across the document, see 5.6.6.
C) If no printing occurs, see 5.6.7.
D) If print quality is not acceptable, see 5.6.8.
E) For other possible problems, see 5.6.9. through 5.6.12
5.6.2 No Display
If nothing appears on the display on power up, check that:
1. The power switch on rear of printer is ON.
2. The input power cord is plugged into both printer and supply outlet.
3. The contrast knob to the left of the configuration label is set for good display contrast.
4. Input power is present on the input power cord.
5. The fuse on the Power Supply PCB is good.
6. The display cable is attached to the display and to the main PCB J11.
7. 38 VDC is present between main PCB J1 pins 1 and 5. If not, check for AC line voltage at
the Power Supply PCB input. If AC is present but 38VDC is not, replace the Power Supply.
9. If 38 VDC is present replace either the main PCB or the display module.
5.6.3 Defective Keypad
If keypad depressions are not sensed proceed as follows:
1. If a single key fails but all others are OK, just that key may be replaced after the keypad is
removed (see 5.5.4).
2. If a row or column of keys all fail, a key may be permanently depressed or the problem is in
the cable between the main PCB and the keypad or on the main PCB.
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5.6.4 Defective Sensor
All sensors transmit infrared light and sense light reflected by a document, gap roller or
cabinet. The sensors are automatically re-calibrated each time the printer powers on.
First check that the flex cable is firmly seated in the connector on the Sensor PCB.
Press 9 0 FUNCT to run diagnostics and display “SENSORS” and the letters LFBMRCE. L is
the left home carriage sensor; F and B are the front and back document sensors, M and R are
the middle and right skew sensors, C is the cabinet open sensor and E is the document edge
sensor. The cabinet open sensor is mounted on the main PCB and looks through a slot in the
rear panel heat sink. The document edge sensor is mounted on the carriage and “looks” down
toward the platen. All other sensors are mounted on the multi-sensor PCB (See picture in
5.1.3). Any sensor that is covered will have its corresponding indicator erased. Each sensor
may be activated to check for proper operation. Press A↑ to conclude this test. Place an object
in any sensor’s light path to remove the corresponding sensor letter from the display. Press
ENTER to return to READY status.
Symptom
Condition
Remedy
Rollers run continuously before a
document is inserted and no “F”
on display during 90 FUNCT.
Front sensor light path is blocked
by paper, paper dust, or a bent
input guide. A sensor may be bent with compressed air.
out of position.
Clear front sensor light path of
paper scraps or blow sensor area
Rollers run continuously after a
Back sensor light path is blocked
Clear back sensor light path of
document is ejected and no “B” on by paper, paper dust, or a bent
paper scraps or blow sensor area
with compressed air.
display during 90 FUNCT.
input guide. Sensor may be bent
out of position.
Carriage drives into the left side of 94 FUNCT parameters are
Check 94 FUNCT parameters
against label under the cabinet
behind the alphanumeric display.
Reinsert sensor cable
the printer.
incorrect
Disconnected sensor cable
Defective left “home” sensor.
Replace multi-sensor PCB
Display reads “Cover Open” even
when cabinet is closed
Cover sensor cannot “see”
reflective dot on inside of cabinet.
Override cover sensor using 99
FUNCT (3.5.3) or replace
reflective foil dot
5.6.5 No Document Motion
If a document will not advance upon insertion:
1. Press EJECT if the previous document was manually removed without an eject command.
2. Press A↑ if configured for DOCUMENT INSERT WITH A↑ KEY (see 3.5.1).
3. Check that the drive belts are on their pulleys and the pulleys are tight on their shafts.
4. Check that the motor cable is seated onto J2 of the main PCB.
5. Remove the connector cover and check that the four motor leads are seated in their
individual connector slots.
6. Measure about 6 ohms resistance between pins 1 and 2 and between 3 and 5 of the motor
connector. If not, replace the motor (see 5.5.11).
7. Repair or replace the main PCB with a bad U1 or U2 driver circuit.
5.6.6 No Carriage Motion
If the carriage will not move at power-up (CARRIAGE FAULT) or after a document is inserted:
1. Check that the flex cable is firmly seated in the connector on the Sensor PCB.
2. Check that the shipping blocks fastening the carriage have been removed.
3. Press ENTER if configured for PRINTING AFTER ENTER KEY (see 3.5.1).
4. Check that the motor cable is seated onto J5 of the main PCB.
5. Remove the connector cover and check that the four motor leads are seated in their
individual connector slots.
6. Measure about 6 ohms resistance between pins 1 and 3 and between 4 and 5 of the motor
connector. If not, replace the motor (see 5.5.10).
7. Repair or replace the main PCB with a bad U6 or U7 driver circuit.
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5.6.7 No Print or Light Print
If there is no printhead noise when the carriage traverses a document:
1. Check that the printhead is plugged into the carriage flex cables.
2. Check that the flex cables are plugged into the main PCB J3 and J4.
3. Replace timer U13 or MOSFET Q7 on the main PCB.
4. Repair or replace the main PCB with a bad driver circuit.
If there is printhead noise but there is no print or light print:
1. Correctly install the ribbon cartridge (see 3.1) or replace it if worn out.
2. Remove the cartridge and check for jammed ribbon.
3. Check that the cartridge knob rotates as the carriage traverses.
4. Check that QUIET MODE is turned off under 92 FUNCT.
5. Check the NORMAL and CQ DARKNESS parameters (see 3.5.4)
7. Check the printhead gap at both ends of the platen(see 5.4.1).
8. Clean the printhead (see 5.1.4).
9. Check that the carriage flange that clamps the drive belt is not bent down.
10. Check that the ribbon shield is pushed up until it clicks into place
5.6.8 Print Quality
Symptom
Print not dark enough on
Condition
Ribbon needs replacement
Remedy
Replace ribbon cartridge.
receipts or multipart forms.
Ribbon installed incorrectly
See page 5 for ribbon installation
Increase print darkness setting See “DARKNESS” service
parameters 3.5.4
Streaking or smearing over
printed lines.
Ribbon installed incorrectly
Ribbon shield is
See page 3 for ribbon installation
Replace ribbon shield.
missing/damaged
Ribbon is near end of life.
Ribbon has too much ink.
Generic ribbon installed
Ribbon fabric is folded or
twisted.
Replace ribbon cartridge.
Replace with Craden ribbon
Replace ribbon cartridge.
Large gaps in printing or
sporadic light print occurs.
Ribbon installed incorrectly
Generic ribbon installed
Printhead or printing circuit is
defective (unusual).
See page 3 for ribbon installation
Replace with Craden ribbon
If unusable, initiate a service call
A row of dots is missing
Print is darker on one side
than on the other
Ribbon getting tangled in
printer
Racked carriage shaft or
misadjusted shaft cam
Ribbon installed incorrectly
Ribbon shield is damaged
Generic ribbon installed
Ribbon shield is damaged
If unusable, initiate a service call
See page 3 for ribbon installation
Replace ribbon shield
Replace with Craden ribbon
Documents being torn
Replace ribbon shield
If print is light all across the print line, check as if printhead noise were present in 5.6.7. Print
on a thick document will always be a little lighter than on a thin one.
If there is ribbon smear on the document and it is not very wrinkled:
1. Check that document is not too thick or printing is too close to a fold or edge (see 1.2)
2. Check for a displaced or missing ribbon shield.
3. Check printhead gap (see 5.4.1).
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5.6.9 Missing Dots
If a single row of dots is missing:
1. Refer to the printwire pinouts on the main PCB schematic. Pin 4 prints the uppermost dots of
uppercase characters, pins 20 through 23 print lower case descenders (g,j,p,q and y) and
pin 24 prints underscores. Disconnect the flex cable from the main PCB and measure the
resistance of the bad printwire through the cable. It should be approximately 12 ohms for a
silver body printhead and 6 ohms for a black body printhead. If it is not, remove the
printhead from the carriage and measure resistance at the printhead. If it is OK, replace the
flex cable. If it is not, replace the printhead.
2. Repair or replace the main PCB with bad driver transistor Q11 through Q33.
3. The printhead may be mechanically faulty with a bent or jammed wire. Replace the
printhead.
5.6.10 Erratic Document Feed or Mispositioning
If feeding is erratic or preprinted forms are not correctly positioned:
1. Check for correct LINES/INCH and LINE #1(see 3.5.1).
2. Check that all service parameters are correctly set (see 5.2).
3. Check that the upper feed rollers move freely in the side plate slots.
4. Check that all belt drive pulleys are tight on their shafts.
5. Check the document drive belt tension (see 5.4.3).
6. Check that the roller springs are properly adjusted (See 5.4.5 and 5.4.8).
5.6.11 Erratic Character Spacing or False Document Jams
If horizontal character spacing is erratic or preprinted forms are not correctly printed:
1. Check for correct CHARACTERS/INCH settings (see 3.5.1).
2. Check that the carriage moves freely by hand.
3. If the carriage shaft shows any residue build-up, wipe it clean with a soft, dry cloth.
4. Check the carriage belt tension (see 5.4.2).
5. Tighten the drive pulley set screw on the carriage motor shaft.
5.6.12 Interface Inoperative
If the printer works in self test, but won't run from the interface:
1. Check that the I/O cable is correct for your application (see 3.11.3)
2. Check for firm mounting of the interface cable.
3. Check for communication parameters set to match the host system (see 3.5.2).
4. Check for correct interface wiring (see 3.11.3).
5. Press 9 4 2 then FUNCT to print all previously received data immediately after the
transaction. Control characters print as underlined lower case.
6. Check that CTS on I/O pin 7 is either not connected or is driven above +3V.
7. Replace the interface circuits in main PCB U14 and U15.
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5.6.13 Diagnostic Flowchart
Use this flow chart to assist in troubleshooting.
Is the display on the printer blank?
No
Yes
•
•
•
•
Power switch is ON
Power cord plugged in both ends
Contrast knob adjusted (3.3)
Power outlet is live
Do the keys on the keypad work?
See 3.2 for functions and exercise
keys
Yes
No
•
Is the keypad locked? (3.5.3)
Will the printer take a document
when it is placed into the machine?
•
•
Press EJECT & CLEAR and try again
Insert paper, press A↑ key (see printer parameter, DOCUMENT
INSERT, 3.5.1)
Yes
No
•
Check sensors (5.6.4)
Does the carriage move when printer
should be printing? Open cabinet
and override cover open sensor
using 99 FUNCT (3.5.3)
•
•
Carriage Fault on display? Foam packing removed?
Insert paper, press A↑ key (see printer parameter, BEGIN
PRINTING, 3.5.1)
Yes
No
•
•
•
•
Ribbon correctly installed? (2.1)
Does the printer print? Insert paper
and press 900 FUNCT on the
keypad (3.7)
Ribbon shield installed correctly? (5.4.1.1)
Remove ribbon, check for jammed cartridge
Check that ribbon knob turns as carriage moves
Yes
No
•
•
•
•
Ribbon correctly installed? Ribbon worn out? (2.1)
Ribbon shield installed correctly? (5.4.1.1)
Document too thick? (1.2)
Is the printed output smearing?
No
No
Yes
Printing in non-printable area of a document or passbook? (1.2)
Is the printed output too light?
Yes
•
•
•
•
•
•
Ribbon correctly installed? Ribbon worn out? (2.1)
Remove ribbon, check for jammed cartridge
Ribbon shield installed correctly? (5.4.1.1)
Quiet mode set to Y? Darkness set too low? (3.5.1, 3.5.4)
Does the ribbon knob turn as carriage moves?
Ribbon guide plate pushed up completely? (5.4.1.1)
Do the rollers run continuously, even
when paper is not in the printer?
Yes
No
No
•
•
•
Paper dust or debris inside printer. (5.1.3)
Blow out debris with compressed air.
Multisensor cable seated correctly? (5.1.3)
Is the printed output spaced
correctly?
Yes
•
•
Characters per inch setting OK? (see printer parameter,
LINES/INCH, 3.5.1)
Check all service parameters. (3.5.4)
Does the printer communicate with
the system when you send a
transaction?
•
•
Check interface cable mounting (pg. 44)
Communication parameters match host system? (3.5.2)
End
No
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5.7 RECOMMENDED SPARE PARTS
Machine Population:
1
1
10
25
50
100
250
Class A Spares Qty:
Class B Spares Qty:
Class C Spares Qty:
1
1
2
1
1
3
2
1
5
3
2
10
5
3
DESCRIPTION
Class A: Ribbon Shield
PART#
73813-1
73812-1
72135-1 (-2 if with USB option)
72132-1
73297-8
99090
Printhead Assy
Main PCB Assy
Sensor PCB Assy
Cleaning Kit
Technical Manual
Class B: Alphanumeric Display
DP8 Keypad Assy
53025
72133-1
72133-2
72137-1
72155-1
DP9 Keypad Assy
Power Supply Assy
Edge Sensor Assy
Class C: DP8 Printhead Cable Assy
DP9 Printhead Cable Assy
DP8 Carriage Belt Assy
DP9 Carriage Belt Assy
Document Drive Belt 90T080P
Motor Assy
72142-1 The DP8 and DP9 use the same
72142-2 recommended spares except
73805-1 for the printhead cable, keypad,
73805-2 and carriage belt assys.
67351
73820-1
5.8 RECOMMENDED SERVICE TOOLS
#1 and #2 Phillips Screwdrivers
3/16", 5/16" and 11/32" Open End Wrenches
.050”, 1/16”, 5/64” and 3/32” Allen Wrenches
.010” to .018” feeler gauges and a 1 lb. or 500 gm. Spring Gauge
6” scale calibrated in 1/100”
3/16” and 1/4” nut driver
43
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Printer Diagram
Cabinet
Latch
Cabinet
Display
Contrast Adjust
Configuration
Label
Keypad/Display
Ribbon
Cartridge
Carriage
Printhead
Carriage
Lifter Ring
Multisensor PCB
Roller
Input Guide
Input Tray
Document Edge
Guide
Serial Port B
USB Port
Serial Port A
Power Switch
Power Cord
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PRINTER ASSY
73819-X
CABINET
73817-X
ELECTROMECH
73816-X
SHIPPING KIT
73818-X
MAIN PCB
72135-1 no USB
72135-2 w USB
CARRIAGE DRIVE
73806-X
PRINTHEAD
73812-1
DOCUMENT DRIVE
73810-X
KEYPAD/DISPLAY
73815-X
CARRIAGE
73802-1
BOX
73804-X
CARR IDLER
73805-X
LOWER DRIVE
73809-X
KEYPAD
72133-1
RIBBON GUIDE
73801-1
REVERSER
73803-1
GATE
73807-X
PLATEN
73808-X
DP8 & DP9 ASSEMBLY TREE
DWG. 75017 REV. C
All assemblies not ending in “X” are used both on DP8 and DP9
For all assemblies ending in “X”, X=1 for DP8 and X=2 for DP9
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