Toshiba Fax Machine GD 1220 User Manual

SERVICE MANUAL

FACSIMILE

GD-1220/1221

File No. SME060017B0

R060121B2200-TTEC

Ver02_2008-08

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GENERAL PRECAUTIONS REGARDING THE SERVICE FOR

e-STUDIO165/167/205/207/237 AND GD-1220/1221

The installation and service should be done by a qualified service

technician.

1) Transportation/Installation

When transporting/installing the equipment, remove the drawer, employ two persons and be sure

to hold the positions as shown in the figure.

The equipment is quite heavy and weighs approximately 32.5 kg (71.65 lb), therefore pay full

attention when handling it.

Be sure not to hold the movable parts or units when transporting the equipment.

Be sure to use a dedicated outlet with AC 110 V / 13.2 A, 115 V or 127 V / 12 A, 220-240 V or 240

V / 8 A for its power source.

The equipment must be grounded for safety.

Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration and

direct sunlight.

Provide proper ventilation since the equipment emits a slight amount of ozone.

To insure adequate working space for the copying operation, keep a minimum clearance of 80

cm (32”) on the left, 80 cm (32”) on the right and 10 cm (4”) on the rear.

The equipment shall be installed near the socket outlet and shall be easily accessible.

Be sure to fix and plug in the power cable securely after the installation so that no one trips over

it.

2) General Precautions at Service

Be sure to turn the power OFF and unplug the power cable during service (except for the service

should be done with the power turned ON).

Unplug the power cable and clean the area around the prongs of the plug and socket outlet once

a year or more. A fire may occur when dust lies on this area.

When the parts are disassembled, reassembly is the reverse of disassembly unless otherwise

noted in this manual or other related documents. Be careful not to install small parts such as

screws, washers, pins, E-rings, star washers in the wrong places.

Basically, the equipment should not be operated with any parts removed or disassembled.

The PC board must be stored in an anti-electrostatic bag and handled carefully using a wristband

since the ICs on it may be damaged due to static electricity.

Caution: Before using the wristband, unplug the power cable of the equipment and

make sure that there are no charged objects which are not insulated in the

vicinity.

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Avoid expose to laser beam during service. This equipment uses a laser diode. Be sure not to

expose your eyes to the laser beam. Do not insert reflecting parts or tools such as a screwdriver

on the laser beam path. Remove all reflecting metals such as watches, rings, etc. before starting

service.

Be sure not to touch high-temperature sections such as the exposure lamp, fuser unit, damp

heater and areas around them.

Be sure not to touch high-voltage sections such as the chargers, developer, high-voltage trans-

former and power supply unit. Especially, the board of these components should not be touched

since the electric charge may remain in the capacitors, etc. on them even after the power is

turned OFF.

Make sure that the equipment will not operate before touching potentially dangerous places (e.g.

rotating/operating sections such as gears, belts pulleys, fans and laser beam exit of the laser

optical unit).

Be careful when removing the covers since there might be the parts with very sharp edges

underneath.

When servicing the equipment with the power turned ON, be sure not to touch live sections and

rotating/operating sections. Avoid exposing your eyes to laser beam.

Use designated jigs and tools.

Use recommended measuring instruments or equivalents.

Return the equipment to the original state and check the operation when the service is finished.

3) Important Service Parts for Safety

The breaker, door switch, fuse, thermostat, thermofuse, thermistor, batteries, IC-RAMs including

lithium batteries, etc. are particularly important for safety. Be sure to handle/install them properly.

If these parts are short-circuited and their functions become ineffective, they may result in fatal

accidents such as burnout. Do not allow a short-circuit or do not use the parts not recommended

by Toshiba TEC Corporation.

4) Cautionary Labels

During servicing, be sure to check the rating plate and cautionary labels such as “Unplug the

power cable during service”, “CAUTION. HOT”, “CAUTION. HIGH VOLTAGE”, “CAUTION.

LASER BEAM”, etc. to see if there is any dirt on their surface and if they are properly stuck to the

equipment.

5) Disposal of the Equipment, Supplies, Packing Materials, Used Batteries and IC-RAMs

Regarding the recovery and disposal of the equipment, supplies, packing materials, used batter-

ies and IC-RAMs including lithium batteries, follow the relevant local regulations or rules.

Caution:

Dispose of used batteries and IC-RAMs including lithium batteries according to this manual.

Attention:

Se débarrasser de batteries et IC-RAMs usés y compris les batteries en lithium selon ce manuel.

Vorsicht:

Entsorgung der gebrauchten Batterien und IC-RAMs (inclusive der Lithium-Batterie) nach diesem Handbuch.

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CONTENTS

GD-1220/1221

1. SPECIFICATIONS AND OUTLINE OF SYSTEM ......................................................... 1-1

1.1 FAX Options ........................................................................................................................1 -1

1.2 Specifications.......................................................................................................................1 -2

1.3 Features ..............................................................................................................................1 -5

1.4 Accessories and Part s .........................................................................................................1 -8

1.5 Options ................................................................................................................................1 -9

1.6 System List ........................................................................................................................1 -10

1.7 Units and Components ......................................................................................................1 -11

1.8 Layout of PC Boards..........................................................................................................1 -12

2.1 Recording paper size...........................................................................................................2 -1

2.2 Effective recording area.......................................................................................................2 -2

2.3 Print mode ...........................................................................................................................2 -4

2.4 Recording paper selection algorithm and print algorithm ....................................................2 -5

2.4.1 Recording paper selection algorith m ........................................................................2 -5

2.4.2 Print algorithm ..........................................................................................................2 -5

2.5 Error processing ................................................................................................................2 -14

2.6 Limitations on reception print.............................................................................................2 -15

3. DIALING/COMMUNICATION CONTRO L ..................................................................... 3-1

3.1 Circuit Connection and Procedure to Change Mode ...........................................................3 -1

3.1.1 Dial call-up transmission to a telephone circuit ........................................................3 -1

3.1.2 Selection of the communication mode .....................................................................3 -2

3.1.3 Procedure to select the transmission mode .............................................................3 -2

3.2 Signaling System Diagram and Signal Forms .....................................................................3 -3

3.2.1 Circuit control signals ...............................................................................................3 -3

3.2.2 Communication with the binary signal s ....................................................................3 -4

3.2.3 V.8/V.34 communication sequenc e ........................................................................3 -12

3.3 FAX Automatic Switching ..................................................................................................3 -25

3.3.1 General functions ...................................................................................................3 -25

3.3.2 TEL mod e ...............................................................................................................3 -25

3.3.3 FAX mode ..............................................................................................................3 -25

4. ELECTRICAL CIRCUIT S .............................................................................................. 4-1

4.1 Configuration .......................................................................................................................4 -1

4.2 Description of Circuits..........................................................................................................4 -2

4.2.1 Configuratio n ............................................................................................................4 -2

4.2.2 Line path switching control circuit.............................................................................4 -4

4.2.3 Dial pulse generation circuit .....................................................................................4 -6

4.2.4 Line current detection circuit ....................................................................................4 -8

4.2.5 CI detection circui t ..................................................................................................4 -10

4.2.6 Line monitor circuit .................................................................................................4 -12

4.3 PC Boards .........................................................................................................................4 -15

5. INSTALLATION ............................................................................................................ 5-1

5.1 Explanation to the Users......................................................................................................5 -1

GD-1220/1221

CONTENTS

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GD-1220/1221

CONTENTS

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1. SPECIFICATIONS AND OUTLINE OF SYSTEM

1.1 FAX Options

e-STUDIO165/167/205/207/237 can be used as a FAX by installing the FAX unit (GD-1220/1221).

Some options can be added when the FAX unit is installed or to extend the FAX functions ( P . 1 -9

"1.5 Options"). The external keyboard (GJ-1040) is necessary for the installation of the FAX unit (GD-

1220/1221).

Be sure to use the FAX unit and the equipment only in the following combinations.

GD-1220

Available

GD-1221

Remarks

e-STUDIO165/205

N/A

e-STUDIO167/207/237

Available *

The system firmware version of the

equipment is T286SY*210 or later.

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

1 - 1

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1.2 Specifications

1) Main system

Type

Desktop type transceiver

Operation

Transmission Manual/Automatic

Reception

Manual/Automatic

2) Scanner

<Scanning density> [ ]: at rotation transmission

Horizontal direction

16 lines/mm, 8 lines/mm

[15.4 lines/mm, 7.7 lines/mm, 3.85 lines/mm]

Vertical direction

15.4 lines/mm, 7.7 lines/mm, 3.85 lines/mm

[16 lines/mm, 8 lines/mm]

Combination

U-Fine:

Fine:

Normal:

16 x 15.4 lines/mm [15.4 x 16 lines/mm]

8 x 7.7 lines/mm [7.7 x 8 lines/mm]

8 x 3.85 lines/mm [3.85 x 8 lines/mm]

Effective scanning area

Standard mode

(For NAD model)

Horizontal scanning: Max. 280 mm (Ledger width)

Vertical scanning:

Max. 432 mm (Ledger length)

(For MJD, AUD, ASD, SAD, TWD, and CND models)

Horizontal scanning: Max. 297 mm (A3 width)

Vertical scanning:

Long original mode

(For NAD model)

Max. 420 mm (A3 length)

Horizontal scanning: Max. 280 mm (Ledger width)

Vertical scanning: Max. 1000 mm

(For MJD, AUD, ASD, SAD, TWD, and CND models)

Horizontal scanning: Max. 297 mm (A3 width)

Vertical scanning:

Max. 1000 mm

Note:

The maximum vertical scanning length is 700 mm when transmission is performed satisfying all

of the following conditions. The equipment is in the long original mode. Direct transmission is

performed. The original has the same width as of A3 or ledger. The receiving facsimile machine

is capable of receiving originals with A4 only.

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

1 - 2

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3) Transmission system

Circuits to be used: Subscriber line/FAX communication network (G3)

Calling automatic transmission (including the sequential multi-address transmission)

Calling automatic reception (polling reception)

Called automatic transmission (polling transmission)

Called automatic reception

Calling manual transmission

Calling manual reception

Called manual transmission

Called manual reception

Communication mode

High-speed mode (Toshiba original procedure mode)

G3 mode

ECM (Error Correction Mode)

Circuit carrier link equalization function

Embedded

Output level

–16 dBm to –8 dBm (The setting can be changed by “1 dB”.)

Input level

–43 dBm to 0 dBm

(Level –55 dBm or lower cannot be detected)

Specifications of the communication mode

High-speed mode

(Toshiba original procedure mode)

G3 mode

ECM

Horizontal scanning den-

sity

8 dots/mm

16 dots/mm

Same as on the left

Vertical scanning density

3.85 lines/mm

7.7 lines/mm

15.4 lines/mm

Same as on the left

Encoding system

MH/MR/MMR/JBIG

MH/MR

MH/MR/MMR/JBIG

Transmission speed

(image signal) and modu-

lation method

14.4 k/12 k/9600

7200/4800/2400 bps

Conformance to V.17/V.29/V.27 ter

Same as on the left

33.6 k/31.2 k/28.8 k/

26.4 k/24 k/21.6 k/

19.2 k/16.8 k/14.4 k/

12 k/9600/7200/

4800/2400 bps

Control signal

300 bps

(V.21)

Same as on the left

T.30 conformance

1200 bps (V.34)

300 bps (V.21)

Procedure to control the

transmission

Toshiba original procedure

Same as on the left

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

1 - 3

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4) Recording system

Recording method

Electrophotographic recording method by LSU (Laser Scanning Unit)

Resolution

Horizontal density 16 dots/mm

Vertical density 15.4 lines/mm

Recording paper size and the effective printing area

Unit: mm (inch)

Paper size

A5-R

B5-R

Dimension (width x length)

148 x 210

Printing area

143 x 204.5

177 x 251.5

252 x 176.5

205 x 291.5

292 x 204.5

252 x 358.5

292 x 414.5

205 x 324.5

134.7 x 210.5

211 x 273.9

274.4 x 210.5

211 x 350.1

274.4 x 426.3

252 x 350.5

182 x 257

257 x 182

A4-R

210 x 297

297 x 210

257 x 364

297 x 420

FOLIO

ST-R

LT-R

210 x 330

139.7 x 216 (5.5 x 8.5)

216 x 279.4 (8.5 x 11)

279.4 x 216 (11 x 8.5)

216 x 355.6 (8.5 x 14)

279.4 x 431.8 (11 x 17)

257 x 356 (10.125 x 14)

COMP

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

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1.3 Features

•

High-speed scanning

The GD-1220/1221 scan one Letter (A4) size Original page in 1.4 seconds (line density 8 dots/mm x

3.85 lines/mm) and stores it into memory.

•

High-speed transmission

The GD-1220/1221 uses a V.34 modem designed for 33,600 bps communications.

Multi-access

Using the multi-access facility, multiple processes can be performed in parallel. Functions, such as

transmission reservation during reception, copying during memory transmission/ reception, etc.

Maximizing the GD-1220/1221’s high-speed scanning and multi-access capabilities provides maxi-

mum office productivity and efficiency. Patterns of the multi-access are as follows:

Scan to Memory during Memory Transmission

Scan to Memory during Reception

Scan to Memory during Substitute Reception

Copying during Memory Transmission

Reception during Copying

Reception during Memory printing

Reception during List printing

Scan to Memory during Memory printing

Scan to Memory during List printing

•

Laser recording on plain paper

Recording is performed on fixed sizes of paper - Ledger, Legal, Letter, Letter-R, Statement, State-

ment-R, Computer, A4, A4-R (to NAD model) or A3, A4, A4-R, A5-R, B4, FOLIO, Letter, Letter-R (to

MJD/AUD/ASD/SAD/TWD/CND models) - using a laser beam printer.

•

Halftone system

Photographic images are clearly recorded by the 256 grayscales using the error diffusion method.

High resolution mode

The GD-1220/1221 can transmit in ultra-fine mode (406 x 392).

Image memory communication function

Picture data can be stored in the image memory. For a delayed transmission, the picture data cre-

ated by scanning Originals is stored in the image memory and to be transmitted at the designated

time.

Other memory functions include multi-address transmission, substitute reception, ECM communica-

tion, etc.

The memory contents will be retained by a backup battery for up to 2 hours if a power failure occurs.

The memory size is 5.7 MB.

•

75 one touch keys

The remote party’s address data can be registered to a one touch key. Communication options can

be registered for each address. Some one touch keys also operate as direct function access keys.

300 abbreviated dial numbers

300 abbreviated dial numbers can be assigned in the range from No. 001 to 999.

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

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•

Alternate number dialing

It is possible to assign two facsimile telephone numbers to one abbreviated dial number or one

touch dial key (one as the primary telephone number and the other as an alternate telephone num-

ber). The facsimile first dials the primary telephone number, then redials if the line is busy until the

redialing limit count is reached. It will then begin to dial the alternate number. (Except for Relay/Mail-

box/Confidential/Polling)

•

Multi-address transmission function

Transmissions of the same original to multiple addresses (up to 375 addresses) are possible using

one operation sequence, in which preset abbreviated dial numbers (300), and one touch dial keys

(75) can be used. When the multi-key is specified, key pad dialing of up to 100 locations, is also pos-

sible.

Multi-polling reception

Polling receptions from multiple remote parties (up to 375 parties) are possible using one operation

sequence, in which preset abbreviated dial numbers (300), and one touch dial keys (75) can be

used. When the multi-key is specified, key pad dialing of up to 100 locations, is also possible.

•

Relay transmission request function

The GD-1220/1221 can originate a relay transmission or serve as a relay station in relay transmis-

sion transactions.

Secure RX

Secure RX allows reception to memory to secure Originals during unattended periods. The user can

select a specific time period and all day (24-hour) operation on selected days. The feature can be

activated and deactivated by using a 4-digit security code.

•

Memory transmission

Allows you to dial the remote party while scanning the original in memory. The original page data is

cleared as the sending of each page is completed. Therefore, the memory is utilized effectively for

transmissions. A maximum of 100 jobs of memory transmission are possible.

Public fax box

An original can be reserved in image memory to be polled by remote stations multiple times. One of

its merits is that any remote station (even one with a non-TOSHIBA facsimile) can poll such originals

without a password.

•

Program continuous polling

By designating the starting interval, time, and day-of-week, an endless polling can be set. Once set,

polling receptions are repeated at the same time on the designated day-of-week.

Sub-address communication

The GD-1220/1221 support communication applications using sub-address (SUB/SEP/PWD) com-

mands conforming to ITU-T. Sub-address communication is possible by keypad dialing, one touch

key dialing, and abbreviated dialing using the sub-address settings in Comm. Options.

•

Security communication

For transmissions, the facsimile checks if the telephone number of the remote party’s facsimile CSI

matches the number dialed on the unit itself. If it matches, the transmission will start. For receptions,

the facsimile checks if the telephone number of the remote party’s TSI matches any number

assigned to an abbreviated dial number or one touch key. If it matches, the reception will start. Thus

transmissions or receptions with any authorized party will be prevented at the earliest stage.

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

1 - 6

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•

Substitute reception into memory

When there is no paper remaining in the drawer(s), when a recording paper jam occurs, the toner is

empty, or printing is already in progress, the received data is stored into memory instead of being

output to recording paper. When the trouble is corrected, or the active printing job is completed, the

received data in memory will then be printed.

•

Communication options

If necessary, the function may be changed and options can be selected for page number, line moni-

toring, turnaround polling, ECM communication and security transmission, etc.

Automatic dialing functions

Dialing with a time designated

Transmitting a original to a designated party at a designated time.

Redialing

When an automatic dialing has been performed and the destination party is busy, redialing will be

repeated as many times as programmed with a certain time interval also programmed.

•

Cover sheet function

This facsimile has a facsimile cover sheet preparation feature built in, allowing the operator to enter

the destination name, sender name at the time of the original transmission. This cover sheet also

allows image data, such as a company logo, to be included.

•

Account code

By entering a different account code for each destination at the time of transmission, account codes

will identify when, for whom, and to whom a particular facsimile message was sent.

Department code

Permits assigning 99 department codes to control access and track activity. These codes are set up

beforehand, and must be used to access machine functions.

Separator page function

GD-1220/1221 have the feature which divide print jobs (received original) using separator page.

Also the customer can program the specified paper drawer for this function.

List output

This allows the operator to print data stored in the memory (reservation list, preset dial number lists,

function list, communication journal, transmission report, etc.).

Power saver mode

This feature turns off virtually all power to minimize power consumption. Only the sub-MPU remains

operation sensing for ringing signals, original insertion, or activation of the [ENERGY SAVER] key.

Sleep mode

Reduces power consumption by cutting off power for the fuser during periods when printing is not

expected. The fast warm up time ensures the printer section will be ready before a full page of

image data can be received.

•

Recovery transmission

Originals that have gone through the redial count limit will not be cleared, but stored for a pro-

grammed period of time. Such originals can be recovered to be transmitted again.

F-code mailbox/relay box communication

Bulletin board F-code mailbox transmissions using ITU-T standard protocol is possible. Permitting

confidential communications with any other similarity equipped facsimile made by TOSHIBA or

some other company.

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

1 - 7

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1.4 Accessories and Parts

The following accessories and parts come with the FAX unit:

Accessory

Qty

1 pc.

1 set

Operator’s manual (for facsimile function): except TW, EU

Modular cord (2 m)

Unpacking instruction

Parts

Qty

1 pc.

2 pcs.

Fax unit

SG3 label

FCC Part 68 label (U.S.A.): NA only

IC label (Canada): NA only

DTS label (EU): EU only

Teleprompt label (New Zealand): AU only

Notice to users label (New Zealand): AU only

Screw

Apply the each label to the specified positions following the Unpacking/Setup Instruction.

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

1 - 8

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1.5 Options

Extends the FAX functions when the FAX unit is installed.

Option

Function

Model

KA-1640PC

MR-2017

MR-3019

GJ-1040

Platen Cover

Automatic Document Feeder (ADF)

Holds originals

Feeds originals

Reversing Automatic Document Feeder (RADF) Feeds originals

External Keyboard Various dialings

The external keyboard (GJ-1040) is necessary for the installation of the FAX unit (GD-1220/1221).

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

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1.6 System List

Automatic

Document Feeder

Reversing Automatic

Document Feeder

Platen Cover

KA-1640PC

(

)

(

)

ADF

MR-2017

RADF

MR-3019

External Keyboard

GJ-1040

Fax Kit

GD-1220/1221

NA/EU/AU/TW

Fig. 1-1

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

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1.7 Units and Components

Original glass

Original scale

Scanning area

Control panel

External keyboard

Toner cartridge

Power switch

Fig. 1-2

Fig. 1-3

Fig. 1-4

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

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1.8 Layout of PC Boards

FAX

NCU

Fig. 1-5

Symbol

Name

Function

FAX

PWA-F-FAX-635 (GD-1220)

PWA-F-FAX-678 (GD-1221)

FAX board

Controls the FAX function

NCU

PWA-F-NCU-631

NCU board

Control the line of telephone

GD-1220/1221

SPECIFICATIONS AND OUTLINE OF SYSTEM

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2. LSU-RELATED FUNCTIONS

2.1 Recording paper size

The following recording paper sizes can be used:

(For NAD model) : LD, LG, LT, LT-R, ST-R, COMP, A4, A4-R

(For MJD, AUD, ASD, SAD, TWD, CND models): A3, A4, A4-R, A5-R, B4, FOLIO, LT, LT-R

GD-1220/1221

LSU-RELATED FUNCTIONS

2 - 1

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2.2 Effective recording area

1) Head : 4 mm (0.16 inch)

2) Foot : 4 mm (0.16 inch)

3) Effective Recording Limits:

For NAD model

[Unit: mm (inch)]

Effective recording area

Paper size

Size (Horizontal x Vertical)

279 x 432

(11 x 17)

275 x 424

(10.8 x 16.7)

216 x 356

(8.5 x 14)

212 x 348

(8.3 x 13.7)

279 x 216

(11 x 8.5)

275 x 208

(10.8 x 8.2)

LT-R

ST-R

COMP

216 x 279

(8.5 x 11)

212 x 271

(8.3 x 10.7)

140 x 216

(5.5 x 8.5)

136 x 208

(5.4 x 8.2)

257 x 356

(10.125 x 14)

253.2 x 348

(9.97 x 13.7)

297 x 210

210 x 297

293 x 202

206 x 289

A4-R

GD-1220/1221

LSU-RELATED FUNCTIONS

2 - 2

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For MJD, AUD, ASD, SAD, TWD, and CND models

[Unit: mm (inch)]

Effective recording range

Paper size

Size (Horizontal x Vertical)

297 x 420

293 x 412

293 x 202

206 x 289

144 x 202

253 x 356

206 x 322

297 x 210

A4-R

A5-R

210 x 297

148 x 210

257 x 364

FOLIO

210 x 330

279 x 216

(11 x 8.5)

275 x 208

(10.8 x 8.2)

LT-R

216 x 279

(8.5 x 11)

212 x 271

(8.3 x 10.7)

2 mm 2 mm

(0.08 inch) (0.08 inch)

4 mm (0.16 inch)

Effective recording area

Feed direction

4 mm (0.16 inch)

Fig. 2-1

GD-1220/1221

LSU-RELATED FUNCTIONS

2 - 3

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2.3 Print mode

The machine provides various print modes to meet various requests from users, such as applicable

recording paper types, recording methods, etc.

GD-1220/1221

LSU-RELATED FUNCTIONS

2 - 4

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2.4 Recording paper selection algorithm and print algorithm

2.4.1

Recording paper selection algorithm

Capable of identifying the above-mentioned recording paper size of a received image, this machine

prints on the recording paper of the same size as when sent, as a rule. If no recording paper of the iden-

tified size is not available, it selects recording paper for printing according to the set mode. The mode is

set by using Func. 15 bit 3.

1) Automatic reduction mode (Func. 15 bit 3 = 0, Default)

Selects recording paper on which the received document can be printed and prints on it.

2) Reduction OFF mode (Func. 15 bit 3 = 1)

Selects recording paper on which the received document can be printed in a full size.

2.4.2

Print algorithm

A reception print image is basically printed on one page. Consequently, the algorithm of reception print

is in the order of same size print, discard extra, vertical reduction print, and divided print. (Refer to the

reception print flowchart.)

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Reception print flowchart

Start

Receive FAX

YES

Within effective

recording area ?

Full-size print

Fraction discard

ON ?

YES

Within

fraction discard length

range ?

Fraction discard print

Vertical reduction

ON ?

Divided print

YES

Calculate reduce ratio

γ from actual image data

γ within max.

reduce ratio ?

YES

Vertical reduction print

Judgment parameter

Effective recording area

Discard

Area excluding 4 mm from the top of recording paper and 4 mm from the bottom.

Function setting by user

Func. 15 bit 6, 7

Vertical reduction

Discard parameter

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[ 1 ] Discard printing

Func. 15 bit 2 permits selecting between ON and OFF of the option for discard extra.

Func. 15 bit 2 = 0 : OFF

Func. 15 bit 2 = 1 : ON (Default)

Func. 15 bits 6 and 7 allow the discard parameter to be set.

Func. 15 (Default Setting bit 2 = 0, bit 6 = 1, bit 7 = 0)

bit 2

bit 6

bit 7

Discard parameter

Discard OFF

0 mm (Discard OFF)

10 mm

17 mm

34 mm

•

When the option for discard extra is ON:

When the length of the received document in the feed direction exceeds the effective recording area

and the part exceeding one page is within the discard parameter, printing takes place with the

exceeding part discarded. When the length of the received document in the feed direction exceeds

the discard parameter range and is within the reduction range of the maximum reduce ratio, vertical

reduction print takes place. When it is not within the reduction range of the maximum reduce ratio,

divided print takes place. The discard extra takes preference over the vertical reduction print.

Rcv. doc.

Rcd. paper

A: Effective recording area

B: Record data length outside

effective recording area

Fig. 2-2

If the length of B is less than the set discard parameter, B is discarded.

•

When the option for discard extra is OFF:

The vertical reduction takes preference without performing discard extra print.

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[ 2 ] Vertical reduction print

Func. 15 bit 5 permits selecting between ON and OFF of the option for Vertical reduction print.

Func. 15 bit 5 = 0 : OFF

Func. 15 bit 5 = 1 : ON (Default)

•

When the option for Vertical reduction print is ON:

When the length of the received document in the feed direction exceeds the effective recording

area, the feed length is reduced in an appropriate reduce ratio and then the received document is

printed on one sheet of recording paper.

The following two patterns of maximum reduce ratio are available according to the setting of Func.

15 bit 1.

Func. 15 bit 1 = 0 : Max. reduce ratio 90 % → The reduce ratio settings of 95% and 90 % are valid.

Func. 15 bit 1 = 1 : Max. reduce ratio 73 % →The reduce ratio settings of 95 %, 90 %, 86 %, 80%,

83 % and 73 % are valid.

•

When the option for vertical reduction print is OFF:

When the length of the received document in the feed direction exceeds the effective recording

area, divided print takes place.

[ 3 ] Divided print

When received data cannot be recorded on one sheet, even if reception reduction and reception dis-

card are carried out, the recorded data is divided in the vertical direction and printed on two or more

sheets with maximum length set up in the equipment, without reduction.

If a long original with length of 216 mm which cannot be recorded on one B4 sheet with the maximum

reduction is received, when A4, B4, and A5 paper is loaded in the first, second, and third drawers,

respectively, for example, the maximum recording paper (B4) is selected and received data is divided

and printed on two or more sheets without reduction. (Refer to

ing paper (Long original)".)

P. 2 -13 " T a ble 3 Selection of record-

Ex.1 Divided into two sheets

Ex.2 Divided into three sheets

Fig. 2-3

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[ 4 ] Similar reduction print

When recording paper of the same size as that of the received document is not available due to running

out of paper or no paper is available to cover the received document, the received document is similarly

reduced and printed on recording paper smaller than the received document.

Ex.1 To print A3-size received document on an A4-R sheet because of running out of paper.

Similar reduction

AA-R

Fig. 2-4

[ 5 ] Rotation print

When recording paper of the same size as that of the received document exists but the orientations are

different on those sheets, the received document is rotated by 270 degrees before being printed. The

rotation function is performed after discard extra, reduction or dividing processing.

The rotation function is valid for received documents of A4, LT, A5, and ST-R sizes.

[ 6 ] Printing with no recording paper

When recording paper has run out during printing, printing takes place on another printable recording

paper starting from the next page, if available. However, if recording paper has run out in the middle of

divided print, reprinting takes place on another recording paper starting from the first one of the divided

pages. (The same operation is done when recording paper of the same size is set in a different paper

drawer.)

For the selection order of recording paper, refer to

P. 2 -12 " T a ble 2 Selection of recording paper".

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[ 7 ] RTI

When printing a received document with the RTI setting ON, RTI is printed on each page but RTI is

printed on the first page only in the case of divided print.

(ON or OFF of RTI is possible by means of the user setting. Default: OFF) RTI is created for the LT or

A4-R width. When printing RTI on A5, B5 and ST-R smaller than those sheets, the information to be

printed is reduced to a printable length.

•

LT size or up

Fig. 2-5

•

A5, B5, ST-R

Fig. 2-6

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[ 8 ] Received document and selection of recording paper

The procedure for selecting recording paper handled by this machine is briefly described below.

Recording paper for reception print is selected according to the print recording paper range and priority

as listed in Table 2. A printable print recording paper range is selected according to the scanning width

and feed length of the received document. A print recording paper range is selected by taking the dis-

card length and feed reduce ratio into consideration.

Shown is an example where an EU model is used, the discard parameter is 10 mm, the feed reduce

ratio is max. 75 %, the scanning width of the received image is A4, the number of lines received is STD

or 2000 lines. Since the scanning width is A4, the recording paper range to be selected is one of A5-R,

A4-R, FOLIO, B4 and A3.

Since 2000 lines are converted to 519 mm, a feed length to allow 390 mm to be printed on one page

with a max. reduce ratio of 75 % is selected. The recording paper length of A4 is 297 mm, the recording

paper length of B4 is 364 mm, and the recording paper length of A3 is 420 mm.

Therefore, an A3 paper range covering 390 mm is selected. After an A3 range is selected, recording

paper is selected according to the priority in Table 2, followed by printing.

Table 1 Selection of recording paper range

For NAD model

Scanning

216 mm

ST-R

LT-R

256 mm

COMP

303 mm

Feed length

ST (140 mm)

LT (216 mm)

COMP

LT-R (279 mm)

LT-R

COMP

LG/COMP (356 mm)

LD (432 mm)

COMP

Long original (over 432 mm)

LT (long)

COMP (long)

LD (long)

For MJD, AUD, ASD, SAD, TWD, CND models

Scanning width

216 mm

A5-R

A4-R

FOLIO

256 mm

303 mm

Feed length

A5 (148.5 mm)

B5 (182 mm)

A4 (210 mm)

A4-R (297 mm)

FOLIO (330 mm)

B4 (364 mm)

A3 (420 mm)

Long original (over 421 mm)

A4 (long)

B4 (long)

A3 (long)

When there is no recording paper which received data can be printed on one sheet of, the maximum

paper loaded in the equipment is selected and data is divided and printed on two or more sheets

without reduction. (Refer to

P. 2 -13 " T a ble 3 Selection of recording paper (Long original)".)

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Table 2 Selection of recording paper

For NAD model

Recording paper range

LT-R

COMP

Priority of

recording

paper

LT-R

COMP

ST-R

LT-R

LT *3

LT-R

COMP

LT-R *1

*2*3

*1*3

A4-R

LT-R

A4-R

COMP

A4-R

*2*3

*1*3

COMP

*1*3

ST-R

For MJD, AUD, ASD, SAD, TWD, and CND models

Recording paper range

A4-R

FOLIO

Priority of

recording

paper

A4-R

FOLIO

A5-R

A4-R

*2*3

FOLIO

LT-R

A4-R

*1*3

*2*3

FOLIO

LT-R

A4-R

FOLIO

*2*3

LT-R

A5-R

*1*3

*2*3

*1*3

LT-R

A5-R

*1*3

A5-R

1 : Similar reduction possible.

2 : Center printing when printing out to a size larger in the scanning direction.

3 : Rotation processing.

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Table 3 Selection of recording paper (Long original)

For NAD model

Recording paper range

LT (long)

COMP (long)

LD (long)

Priority of

recording

paper

COMP

LT-R

*1*3

A4-R

*1*3

ST-R

For MJD, AUD, ASD, SAD, TWD, and CND models

Recording paper range

A4 (long)

B4 (long)

A3 (long)

Priority of

recording

paper

A4-R

*1*3

FOLIO

LT-R

FOLIO

LT-R

*1*3

A5-R

1 : Similar reduction possible.

2 : Center printing when printing out to a size larger in the scanning direction.

3 : Rotation processing.

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2.5 Error processing

If paper has run out or a drawer has been pulled out, follow the procedure described below.

1) If recording paper of a larger size has run out during communication:

For DIS redeclaration in the mode change procedure, declare the first recording paper size

declared, as it is.

2) If a document has been received with recording paper of a larger size empty:

Declare the maximum value of the remaining recording paper or the attached drawer. Conform to

the setting of Func. 8 bit 4.

3) If the drawer has been pulled out:

Assume A4 if none of the drawers is left.

4) If all paper has run out:

When the recording paper width capacity is recording paper and all paper has run out, assume A4.

(Same processing is done when only the recording paper of scan width less than 216 mm is set.)

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2.6 Limitations on reception print

The following limitations are imposed on reception print.

1) Reception print is not performed from the SFB.

2) Even if the ADU is installed, it cannot be used.

3) When illegal paper is selected and printed on due to an operator mistake, the completion of printout

is assumed and no printout is performed again.

4) The feed length of a received document is not limited. That is, printing is performed even if the

received document has several lines for printing. However, if the top lines are less than 5 lines, no

printing takes place. This also applies to multiple pages in divided print.

5) Paper of the same size is present in multiple drawers, printing takes place according to the following

drawer priority.

Order

Drawer

Drawer selected by code 480 in system mode

1st drawer

2nd drawer

3rd drawer

4th drawer

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3. DIALING/COMMUNICATION CONTROL

3.1 Circuit Connection and Procedure to Change Mode

3.1.1

Dial call-up transmission to a telephone circuit

START

YES

Detecting a calling signal?

YES

Detecting an off-hook signal?

DC circuit closed

After detecting the dial tone,

or 3.3 seconds elapsed

Selection signal sent out

END

Standby state

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3.1.2

Selection of the communication mode

This machine has three types of communication mode. The mode to be used is determined according

to the combination of the types of the circuits and communication and available function of the other

side’s machine.

Communication mode

Toshiba original procedure

ECM

Telephone circuit

{

3.1.3

Procedure to select the transmission mode

START

Other side machine has the

Toshiba original

procedure mode?

YES

Communication using the

Toshiba original procedure

YES

Other side machine has

ECM mode?

ECM communication

YES

Other side machine has G3 mode?

G3 communication

*1 This step is only checked when the other side machine has CRP2 (+ CRP1) or when the trans-

mission is started by the CRP calling. (The first transmission to the other side with CRP1 only

is performed in the ECM mode.)

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3.2 Signaling System Diagram and Signal Forms

3.2.1

Circuit control signals

The following circuit control signals are used in the binary and tonal procedures.

• Circuit control signals

CED

CNG

Called station identification

Indicates that the sender is a FAX machine in the automatic called

mode. (*1)

Calling tone

Indicates that the sender is a FAX machine in the automatic calling

mode. (*1)

*1: This signal can be sent manually.

•

Signal form

Signal name

Signal form

f: 2100 ±15 Hz

CED

t: 2.6 - 4.0 sec

CNG

f: 1100 ±38 Hz

t: 0.5 sec ±15%

(L: 3 sec)

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3.2.2

Communication with the binary signals

In the Toshiba original procedure/G3 modes, communication is performed with the binary procedure as

follows.

1) Binary procedure

Transmission and reception in the Toshiba original procedure/G3 modes

Transmtter Receiver

Mode change possible*

Informing that there is

the next page

Mode change is possible only for the original set manually.

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Transmission and reception in the ECM mode

ECM (Error Correction Mode) conforms to T.30.

When an error has occurred to the received image data, the receiving station informs the sending

station of the occurrence of the error, and the sending station sends the image data again.

Transmtter

Receiver

256 frames received

Error occurred

Only error frame retransmitted

Page 1 completed

Page 2 completed

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Cancellation during the transmission

If the [CLEAR/STOP] button is pressed during the direct transmission or memory input, the dis-

play to confirm the cancellation appears. The communication is finished normally regardless of

the presence/absence of the next page or mode changes by pressing the [CLEAR/STOP] button.

If the [CLEAR/STOP] button is pressed anytime except during the transmission of the image

data, DCN is forcibly sent to terminate the communication.

To cancel the job during the memory transmission or the polling transmission job, press the [JOB

STATUS] button on the External Keyboard, select the transmission job to cancel, and then press

the [ ] button on the LCD display.

Transmtter

Receiver

[

]

JOB STATUS button

[

]

CANCEL button

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2) Binary signals

NSF

Non-Standard Facility

Informs that the receiving station (machine) has a non-standard facility.

NSC

Non-Standard Facility Command

Command to transmit using the non-standard facility which is selected corresponding to NSF (i.e.,

Polling etc.).

NSS

CSI

CIG

TSI

Non-Standard Facility Setup

Command to transmit using the non-standard facility which is selected corresponding to NSF or

NSC.

Called Subscriber Identification

Provides the telephone number of the called station. Used to check the identity of the called sta-

tion.

Calling Subscriber Identification

Provides the telephone number of the calling station. Used to check the identity of the calling sta-

tion (Polling, etc.).

Transmitting Station Identification

Provides the telephone number of transmitting station. Used to check the identity of the transmit-

ting station.

DIS

Digital Identification Signal

Informs that the receiving station (machine) has a standard facility (G3/G2).

DTC

Digital Transmit Command

Command to transmit using the standard facility which is selected corresponding to DIS (i.e., Poll-

ing, etc.).

DCS

SUB

SEP

PWD

Digital Command Signal

Commands to transmit using the standard facility which is selected corresponding to DIS or DTC.

Sub-address

Indicates that the FIF information is a sub-address in the domain on the call-in side.

Select Polling

Indicates that the FIF information is a sub-address for the polling mode.

Password

Indicates that the FIF information is a password for the polling mode in a reception.

Indicates that the FIF information is a password for transmission in a transmission.

CFR

FTT

Confirmation of Reception

Informs that the FAX is ready to receive data.

Failure to Train

Informs that the TCF signal has not received correctly and requests the re-training.

EOM

End of Message

Informs that the the 1st page has been transmitted and there is the next page; command to return

to the beginning of the phase B.

MPS

Multi-page Signal

Informs that the 1st page has been transmitted and there is the next page; command to return to

the beginning of the phase C.

EOP

MCF

End of Procedure

Informs that a document has been transmitted and there is no more pages.

Message Confirmation

A reply to MPS, EOM or EOP; informing that image signals have been received correctly and the

FAX is ready to receive data.

RTN

Retrain Negative

Informs that a document has not been received correctly; requests for the retraining or phase syn-

chronization to receive the next page.

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PIP

Procedure Interrupt Positive

Informs that the image signals have been received correctly and requests the operator’s reply by

telephone or to return to the beginning of the phase B to continue the communication (i.e., CALL

Request, etc.).

Procedure Interrupt Negative

Informs that the image signals have not been received correctly and requests for operator’s reply

by telephone or to return to the beginning of the phase B to continue the communication.

PRI-EOM Procedure Interrupt EOM

Command similar to EOM. Operation by operator is necessary.

PRI-MPS

PRI-EOP

DCN

Procedure Interrupt MPS

Command similar to MPS. Operation by operator is necessary.

Procedure Interrupt EOP

Command similar to EOP. Operation by operator is necessary.

Disconnect

Command to disconnect the FAX line and to connect the telephone line. Reply from the other side

is not necessary.

Receive Ready

Informs that the FAX is ready to receive documents and requests for data to set the reception

mode. (ECM mode)

RNR

PPR

Receive Not Ready

Informs that the FAX is not in the receivable state. (ECM mode)

Partial Page Request

Informs that a part of page (ECM block) has not been received correctly. The number of the frame

needs to be corrected is informed by the FIF. (EC mode)

PPS

CTC

Partial Page Signal

Informs that a part of page (ECM block) or one page has been transmitted. (EC mode)

Continue to Correct

Replies to the 4th PPR which requests to correct the image signal; informs that the transmitting

station will continue to correct the frame data. (ECM mode)

CTR

EOR

Response for Continue to Correct

Replies to CTC and informs that the receiving station has received and accepted the CTC. (EC

mode)

End of Retransmission

Informs that the transmitting station has completed the correction of the error frame data (binary

signal) of the previous ECM block. (ECM mode)

ERR

RTP

Response for End Retransmission

Replies to EOR and requests to transmit the image signal of the next ECM block. (ECM mode)

Retrain Positive

Informs that the message has been received completely and that the subsequent message can be

continued after receiving the synchronization signal and CFR signal.

CRP

Command Repeat

Requests to resend all the commands including optional frames because the preceding command

has been received incorrectly.

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3) Frame structure of binary signals

Each binary signal frame is comprised of the following sequence and fields. However, some binary

signals do not have the FIF field inserted.

FCF

FIF

FCS

Preample

F : Flag sequence

Indicates the start or end of a frame. Also establishes the frame synchronization.

A : Address field

Informs the address.

C : Control field

Informs if this frame is the last one in this procedure.

FCF: FAX control field

Informs the type of the binary signal.

FIF: FAX information field

Informs FAX information such as the functions.

FCS: Frame check sequence

Checks if there was any error in the transmission from A to FIF.

Format of F, A and C

Format

When this frame is the last frame, X = 1.

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FCF format of each binary signal

Format

Binary signal

NSF

NSC

NSS

CSI

CIG

TSI

DIS

DTC

DCS

SUB

SEP

PWD(Rx)

PWD(Tx)

CFR

FTT

EOM

MPS

EOP

MCF

RTN

PIP

PRI-EOM

PRI-MPS

PRI-EOP

DCN

RNR

PPR

PPS

CTC

CTR

EOR

ERR

RTP

CRP

X = 1 for the station which received DIS.

X = 0 for the station which received a response signal to DIS.

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4) Training

The training is performed in the binary procedure to surely transmit the image signals.

Training signal

The training signal is transmitted following the DCS signal at the modem speed specified by the

DCS signal. Responding to this training signal, the receiving side adjusts the auto-equalizer.

Format of the training signal

14.4 Kbps, 12 Kbps

Segment 1

Segment 2

Segment 3

Chain-store

Segment 4

Equalizer

adjustment

pattern

Alternation

of ABAB

information Scrambled binary data “1”

sequence

TCF

106 msec

1240 msec

27 msec

20 msec

1393 msec

9600 bps, 7200 bps

Segment 1 Segment 2 / Segment 3

Segment 4

Repeating 2-state

signal

Scrambled data “1”

TCF

V.29 No signal

(

)

(

)

Binary

Hexa or octal

20 msec

53 msec+160 msec

253 msec

4800 bps, 2400 bps

Segment 1Segment 2

Segment 3

Segment 4

Segment 5

Continuous

180° phase

inversion

Non-

modulated No signal

carrier

0° to 180°

2-phase pattern

Scrambled data “1”

TCF

V.27ter

(

)

(

)

(

Hexa or octal)

Binary

4,800 bps: 923 msec,

2,400 bps: 1158 msec

TCF signal

An error may occur in the image data if the training is not performed correctly. The transmitting

side sends a TCF signal and checks if any error occurs in image data before the image data

communication to follow. When the receiving side detects an error in the TCF signal, it transmits

an FTT signal to the transmitting side to request the retraining. When there is no error, the receiv-

ing side transmits a CFR signal.

The TCF signal transmits all zeros for 1.5 seconds at the same modem speed as that for the

training signal.

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3.2.3

V.8/V.34 communication sequence

1) Outline

V.8 is performed as a startup procedure to switch to V.34. V.8 can connect an existing facsimile

machine to the equipment using a data modem or other V-series modems. The V.34 modem has

a modem circuit previously recommended, allowing it to be also connected to the existing

modems while they are upper compatible.

New technologies such as the pre-emphasis technology *1 and the probing technology *2 are

fully used. The pre-emphasis technology *1 not only speeds up the modulation, but also gains

the S/N ratio. The probing technology examines the line characteristics and optimizes the

modem for the line condition. Therefore, not only do these technologies speed up the transmis-

sion momentarily, but also the average speed of the process during the data transmission is

increased.

For V.8 and the pre/post-FAX transmission for V.34, the procedure is speeded up by the full

duplex communication.

Following 14 types of the image transmission speed are available: *3

33.6 kbps/31.2 kbps/28.8 kbps/26.4 kbps/24.0 kbps/21.6 kbps/19.2 kbps/16.8 kbps/14.4 kbps/

12.0 kbps/9.6 kbps/7.2 kbps/4.8 kbps/2.4 kbps

The modulating speed (baud rate) *4 can be selected from 2,400, 3,000, 3,200 symbol/sec (man-

datory), or 2,743, 2,800, 3,429 symbol/sec (option). The data rate can be set more accurately

than the conventional modem.

*1 A signal is sent while raising the output level in the high-frequency band in which the noise

is relatively loud.

*2 Tone signal called “Probing Tone” is sent for the receiver to examine the line characteris-

tics of the line.

*3 In the ITU-T Recommendation, it is described as “data rate”. “Image transmission speed”

is the same as “data rate”.

*4 In the ITU-T Recommendation, it is described as “symbol speed”. The “Symbol rate”,

“Modulating speed”, and “Baud rate” are the same thing. This machine cannot realize the

speed of 2,743 symbol/sec.

Notes:

1. ECM is used in the V.34 procedure. If the setting for the ECM transmission/reception of the

user data is set to “Not performed”, the V.8 procedure is not performed and the procedure is

not switched to V.34. V.17 or lower is selected in this case.

2. When the transmission/reception speed is set to 14.4 kbps or slower, the V.8 procedure is not

performed, and V.17 or lower is selected.

3. See “Late start (P3-20)” to move to the V. 8/V.34 procedure after starting with the V.21 proce-

dure.

4. After the V.34 procedure is started, the fallback for the V.34 procedure is performed.

However, the fallback for the V.17 mode or lower mode is not performed.

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2) Standard procedure

Transmitter

Receiver

Line closed

The available modulation mode is in formed.

Each declares that it has V.34 capability. The

procedure moves to V.34 in the phase 2.

Network interaction

(

)

Phase 1

P3-14)

(

After the information about the modem capa-

bility is exchanged, the receiver determines

the modulation speed based on the result of

reception of the probing signal which was sent

by the transmitter.

Probing/Ranging

(

)

Phase 2

P3-15)

(

Equalizer/Echo

canceller training

To determine the image transmission speed,

the transmitter sends a training signal.

(

)

Phase 3

P3-16)

(

Final training

(

The optimum image transmission speed is

determined according to the training signal

received.

)

Phase 4

P3-16)

(

The pre-FAX transmission which is the same

as that for the normal T.30 is performed at

1,200 bps.

Control channel

P3-17)

(

The training signal is sent with the determined

parameter, then the image data are sent.

Primary channel

P3-18)

(

Image data

P3-18)

(

The post-FAX transmission which is the same

as that for the normal T.30 is performed at

1,200 bps.

Communication

end procedure

(

P3-19)

Line opened

GD-1220/1221

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Network interaction (Phase 1)

The V.8 procedure is performed as the startup procedure for the V.34 high-speed modem.

In the V.8 procedure, mainly the optimum modulation method (V series modem mode) that can

be operated between the transmitter and receiver is determined.

Transmitter

Signal name

Abbreviation

Function

Remarks

Calling tone

CNG

1100 Hz tone signal specified

by T.30 indicating the sender

is a FAX machine in the auto-

matic calling mode.

Call Menu signal

Mainly indicates an available Modulated by V.21 (L) *1.

modulation method such as

V.21, V.27ter, V.29, V.17,

V.34, etc.

Transmission rate: 300 bps

CM terminator

Indicates the detection of the Modulated by V.21 (L) *1.

JM signal or the termination of Transmission rate: 300 bps

CM signal.

Call Indicator signal

Indicates the general commu- For the late start only.

nication functions. It is sent

when the V.8 procedure is

restarted.

(P3-20)

Modulated by V.21 (L) *1.

Transmission rate: 300 bps

Receiver

Signal name

Abbreviation

Function

Remarks

Answer amplitude tone

ANSam

2100 Hz tone signal ampli-

tude-modulated to 15 Hz.

Tone equivalent to CED of the

conventional machine.

Joint Menu signal

Indicates the terminal type

such as a FAX machine.

Modulated by V.21 (H) *1.

Transmission rate: 300 bps

Response to a CM sent from

the transmitter and informs

available modulation method.

*1 V.21 (L) ..........Low frequency channel defined by the V.21 recommendation 1,080±100 Hz

(980 Hz: 1, 1,180 Hz: 0)

V.21 (H)..........High frequency channel defined by the V.21 recommendation 1,750±100 Hz

(1,650 Hz: 1, 1,850 Hz: 0)

GD-1220/1221

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Probing/Ranging (Phase 2)

Examines the line characteristics and sets the parameters for the modulation related items such

as the modulating speed.

Transmitter

Signal name

Abbreviation

Function

Remarks

INFO sequence

INFO0c

Informs the modem capability Transmission rate: 600 bps

such as modulating speed

and frequency transmission

capability (two frequency

bands (high and low) used to

examine the line characteris-

tics), and requests for adjust-

ing.

Tone B

Synchronization between the B is a signal that shifts the

modems by 1200 Hz tone sig- phase B 180°.

nal

Line probing signal L1

Line probing signal L2

Tone signal to analyze the line Probing is to examine the line

characteristics by probing

characteristics.

Tone signal between 150

Hz and 3,750 Hz in units of

150 Hz

Receiver

Signal name

Abbreviation

Function

Remarks

INFO sequence

INFO0a

Informs the modem capability Transmission rate: 600 bps

such as the modulating speed

and frequency transmission

capability.

Tone A

Synchronization between the A is a signal that shifts the

modems by 2,400 Hz tone

phase A 180°.

signal

INFO sequence

INFO0h

Based on the analysis of the

line probing signal sent from

the transmitter, it informs the

pre-emphasis filter and modu-

lating speed to be used for the

data transmission.

Transmission rate: 600 bps

GD-1220/1221

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Equalizer and echo canceller training (Phase 3)

Training (adjustment) is performed according to the parameters set in the phase 2 to optimize the

filters such as an equalizer.

Transmitter

Signal name

Abbreviation

Function

Short training

Remarks

S signal

S is a signal made as the

result of phase transition of S.

S signal

PP signal

Used by the modem of the

receiver to train the equalizer.

TRN signal

TRN

Used by the receiver to deter-

mine the transmission rate.

Final training (Phase 4)

The settings such as the maximum value for the data rate, selection of the trellis encoder, and

data rate which can be supported are made in this phase.

Transmitter/receiver

Signal name

Abbreviation

Function

Remarks

PPh signal

PPh

Used by the modem of the

other side to train the equal-

izer.

ALT signal

ALT

Modulation parameter

E sequence

MPh

Informs the parameters used

for the image transmission

such as maximum data signal

rate and type of the trellis cod-

ing/pre-coding.

20 bit sequence of “1”s in

binary

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Control channel

The conventional T.30 procedure is performed. The transmission rate is 1200 bps.

Transmitter

Signal name

Abbreviation

Function

Remarks

Flag

flags

Maintains the synchroniza-

tion.

7E (H)

Non-standard facilities

setting

NSS

Receives an NSF sent from

the receiver. It selects the

available mode from the

received NSF, and specifies

the mode for the reception.

Transmitting Subscriber

TSI

Informs the telephone number

of the transmitter.

Digital Command Signal

DCS

Specifies the mode that can

be used for the communica-

tion.

Declares to switch to the high- “1” is sent continuously.

speed procedure.

Receiver

Signal name

Abbreviation

Function

Remarks

Non-Standard Facilities

NSF

Informs the presence of the

facilities other than those rec-

ommended by ITU-T, abbrevi-

ated user names, and

manufacturer codes, etc.

Called Subscriber ID

Digital Identification Signal

Flag

CSI

DIS

Informs the telephone number

of the receiver.

Informs the standard facilities

recommended by ITU-T.

flags

CFR

Maintains the synchroniza-

tion.

7E (H)

Confirmation for Recep-

tion

Informs that the training of the

modem is completed, and the

receiver is ready to receive

the image signal.

Reference:

In the control channel, the frequency of the signals to be sent is different

between the transmission and reception. The signal echoed back has never

been misidentified as a signal sent from the other side. Therefore, this channel is

not influenced by signals echoed back.

GD-1220/1221

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Primary channel

The training is performed according to the parameters set in the phase 4. The transmission rate

is 1,200 bps.

Transmitter

Signal name

Abbreviation

Function

Short training

Remarks

S signal

S is a signal that makes a

transition from phase S.

S signal

PP signal

Used by the modem of the

receiver to train the equalizer.

B1 sequence

Scrambled data frame to be

sent when the startup process

is completed

Image data

Image data are sent.

Transmitter

Signal name

Abbreviation

Image data

Turn off

Function

Remarks

Image data

Encoded image data

Scrambled 1 is sent for 35

ms.

GD-1220/1221

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Communication end procedure

This procedure is to terminate the communication. The transmission rate is 1,200 bps.

Transmitter

Signal name

Abbreviation

Function

Short training

Remarks

Sh signal

ALT signal

E sequence

ALT

End of procedure signal

PPS-EOP

The transmission of one page

is completed.

Flag

flags

DCN

Maintains the synchroniza-

tion.

7E (H)

Disconnection signal

Informs to disconnect the line.

Receiver

Signal name

Abbreviation

Function

Remarks

Sh signal

ALT signal

E sequence

Flag

Short training

ALT

flags

Maintains the synchroniza-

tion.

7E (H)

Message confirmation

MCF

Indicates that the image sig-

nal is received normally, and

the receiver is ready to

receive the next page.

GD-1220/1221

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3) Example of protocol

The signals shaded in the following figure are the most important signals in the procedure.

Late start

The receiver cannot detect CM signal while it is sending the ANSam signal. Therefore, it sends a

DIS signal to inform the availability of V.8 support. The transmitter sends a CI signal that causes

the receiver to send another ANSam signal which makes the receiver move to the V.8 procedure.

Transmitter

Receiver

Line closed

(

DIS cannot

be recognized

)

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Multi-page sequence

In the same manner as the T.30 procedure, the transmitter sends a PPS-MPS signal after send-

ing the image data. The receiver sends an MCF signal and moves to the next page transmission.

Transmitter

Receiver

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Mode change

The transmitter and receiver send a PPS-EOM signal and an MCF signal respectively. Then the

receiver and transmitter send a DIS signal and a DCS signal respectively to change the mode.

Transmitter

Receiver

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Change of the image transmission speed by the receiver

The receiver sends a PPh signal responding to an Sh signal sent from the transmitter. Then, the

image transmission speed is determined according to the MPh sequence sent from the both

modems.

Transmitter

Receiver

GD-1220/1221

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Change of the image transmission speed by the transmitter

The transmitter sends a PPh signal after sending the image data. The receiver returns a PPh sig-

nal. Then, the image transmission speed is determined according to the MPh sequence sent

from the both modems.

Transmitter

Receiver

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3.3 FAX Automatic Switching

3.3.1

General functions

There are two types of setting for the FAX Auto-Switching Mode Selection: TEL Mode and FAX Mode.

3.3.2

TEL mode

This mode is selected to prioritize telephone communication when the frequency of the fax reception is

low. When the TEL mode is selected, the automatic FAX reception function does not work. Therefore,

when a calling signal comes from the exchange, the telephone ringer continues ringing until the opera-

tor picks up the handset. When the operator has learned that the caller is sending a FAX, he has to per-

form the manual reception operation.

3.3.3

FAX mode

This mode is selected when the telephone circuit is used only for FAX communication. When the FAX

mode is selected and a calling signal comes from the exchange, the FAX reception operation starts

automatically without ringing the telephone ringer.

In the FAX mode, a calling number can be set up to 15 calls in the SET FUNCTION (FUNC 14 Bits 7 to

4).

0.5s

CNG

CNG-off

detection T2

CNG-on detection T1

CNG-determined

•

As shown above, after CNG-on detection time T1 (175 ms) and CNG-off detection time T2 (350 ms)

have elapsed, and the T1 period has been turned on and then the T2 period off, CNG is determined

to have occurred once.

GD-1220/1221

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4. ELECTRICAL CIRCUITS

4.1 Configuration

GD-1220/1221

FAX board

Speaker

V.34 MODEM

Analog SW

NCU board

MAIN board

SoC

ASIC

Fig. 4-1

GD-1220/1221

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4.2 Description of Circuits

4.2.1

Configuration

This section describes the function of each circuit.

The NCU board consists of the transformer, relay, analog switch and other peripheral devices. It con-

trols switching of the line path, generates the dial pulses, detects the line current and ring signal, and

monitors the line.

NA/TW models

NCU board

REVA

REVB

IC53

Line current

detection

circuit

TXOUT

Line

IC51

IC53

IC52

Analog

switch

RXIN

DB1

IC52

CNG signal

detection

circuit

ANSDET

Dial pulse

generation

circuit

FAX board

External

telephone

consumption

circuit

ATT3DB

CML

RLY2

CML relay

Ring signal

detection

circuit

Fig. 4-2

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NCU board

REVA

REVB

Line current

detection

circuit

CML

Dial pulse

generation

circuit

IC5

IC6

Line

TXOUT

Analog

switch

ATT3DB

RLY4

Relay

RLY3

CML relay

FAX board

IC3

IC4

External

telephone

RXIN

Analog

switch

IC4

CNG signal

detection

circuit

ANSDET

DB1

RLADJ1

RLADJ2

consumption

circuit

Ring signal

detection

circuit

Fig. 4-3

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4.2.2

Line path switching control circuit

NA/TW models

NCU board

FAX board

MAIN board

CML1

ATT3DB1

27 144

IC23

Q51

RLY2

CML relay

+12V

62 142

ASIC

R67

R71

9,11

IC51

Line

Analog

switch

IC53

1 TXOUT1 28,29

[

]

25,26

IC12

[

IC53

]

IC2

R59

RXIN1

]

IC52

[

MODEM

External

telephone

R66

R68

Ring signal

detection

circuit

Fig. 4-4

The line path switching control circuit consists of the CML relay (RLY2) and analog switch (IC51) on the

NCU board, the ASIC (IC23) on the MAIN board and the other peripheral devices.

The CML relay is switched according to the CML1 signal output from the ASIC on the MAIN board.

When the CML1 signal goes HIGH, Q51 comes on to turn ON the CML relay.

The analog switch is switched according to the CML1 signal and ATT3DB1 signal. When the CML1 sig-

nal or ATT3DB1 signal goes HIGH, the analog switch is turned ON.

Turning ON the CML relay and analog switch allow the MODEM to be connected to the line.

Signal Name

CML1

ATT3DB1

Type

Active

Description

Line 1 CML Relay Control Signal

Line 1 Attenuator Control Signal

Destination

RLY2, IC51

IC51

Values in [ ] are GD-1221 in case that the descriptions vary between GD-1220 and GD-1221.

GD-1220/1221

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NCU board

Line current

detection

circuit

FAX board

MAIN board

CML1

21 144

RLY3

+12V

ATT3DB1

RLADJ11

RLADJ21

22 142

IC23

29 141

CML relay

ASIC

IC5

63 140

Analog switch

R28

R26

R29

C13

IC6

IC3

Line

RLY4

Relay

R31

R36

C12

+12V

11 10

External

telephone

Analog

switch

R32

R30

C14

28,29

]

R11

[

TXOUT1

RXIN1

25,26

IC12

[

]

IC6

IC2

]

IC4

[

MODEM

IC7

Ring signal

detection

circuit

Fig. 4-5

The line path switching control circuit consists of the CML relay (RLY3) and analog switch (IC3, IC5) on

the NCU board, the ASIC (IC23) on the MAIN board, and the other peripheral devices. It changes the

path for the FAX send/receive signals and connects it to each control circuit.

The CML relay is switched according to the CML1 signal output from the ASIC on the MAIN board.

When the CML1 signal goes HIGH, Q4 comes on to turn ON the CML relay.

The analog switch (IC3) is switched according to the CML1 signal and ATT3DB1 signal. When the

CML1 signal or ATT3DB1 signal goes HIGH, the analog switch is turned ON.

The analog switch (IC5) is switched according to the RLADJ11 and RLADJ12 signals.

The analog switch is switched according to the states of the RLADJ11 and RLADJ21 signals.

Turning ON the CML relay and analog switch allow the MODEM to be connected to the line.

Signal Name

CML1

Type

Active

Description

Destination

RLY3, IC3

Line 1 CML Relay Control Signal

Line 1 Attenuator Control Signal

Line 1 Return Loss Adjustment Signal

ATT3DB1

IC3

IC5

RLADJ11, 21

Values in [ ] are GD-1221 in case that the descriptions vary between GD-1220 and GD-1221.

GD-1220/1221

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4.2.3

Dial pulse generation circuit

NA/TW models

NCU board

FAX board

MAIN board

RLY2

+12V

CML relay

CML1 27

27 144

Q51

Line

DB1

IC23

+5V

ASIC

PC1

Q53

External

telephone

LD1

61 143

Ring signal

detection

circuit

Fig. 4-6

The dial pulse generation circuit consists of the diode bridge (DB1), photocoupler (PC1), the ASIC

(IC23) on the MAIN board and the other peripheral devices. It generates the dial pulses in the FAX

transmission and dialing to the outside.

The ASIC makes the CML1 signal become HIGH to connect the line to the MODEM side. To generate

the dial pulse, the ASIC makes the LD1 signal become HIGH to turn ON Q53. This allows the photo-

coupler to come on and the current flows through the DB1 to send the dial pulses to the line.

Signal Name

LD1

Type

Active

Description

Destination

Line 1 Dial Pulse Generation Signal

Q53

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NCU board

FAX board

MAIN board

RLY3

+12V

CML relay

CML1 27

144

+5V

IC23

IC1

Line

ASIC

LD1

143

External

telephone

Line path

switching

circuit

Ring signal

detection

circuit

Fig. 4-7

The dial pulse generation circuit consists of the photocoupler (IC1), the ASIC (IC23) on the MAIN board

and the other peripheral devices. It generates the dial pulses in the FAX transmission and dialing to the

outside.

The ASIC makes the CML1 signal become HIGH to connect the line to the MODEM side. To generate

the dial pulses, the ASIC makes the LD1 signal become HIGH to turn ON Q6. This allows the photocou-

pler to come on and the current flows through the line for sending a dial attempt.

Signal Name

LD1

Type

Active

Description

Destination

Line 1 Dial Pulse Generation Signal

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4.2.4

Line current detection circuit

NA/TW models

NCU board

FAX board

MAIN board

R87

19 REVA1 66

160

IC23

PC3

ASIC

20 REVB1 33

161

R86

Line

Fig. 4-8

The line current detection circuit consists of the photocoupler (PC3), ASIC (IC23) on the MAIN board

and the other peripheral devices. It detects a dial tone and the hook status of the external telephone

from the current flowing through the line.

When a dial tone is input from the telephone line, current flows through the line and the photocoupler is

repeatedly turned ON/OFF. This allows the REVA1 and REVB1 to be the pulse signals and input to the

ASIC, then the dial tone is detected.

When the handset is lifted from the external telephone, current also flows through the line and the pho-

tocoupler is turned ON/OFF, then the off-hook state is detected.

Signal Name

REVA1

Type

Active

Description

Destination

Line 1 Current Detection Signal

Line 1 Reverse Current Detection Signal

IC23

REVB1

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NCU board

FAX board

MAIN board

19 REVA1 66

160

IC2

IC23

Line current

detection

ASIC

R26

20 REVB1 33

161

Line

Fig. 4-9

The line current detection circuit consists of the line current detection IC (IC2), ASIC (IC23) on the

MAIN board, and the other peripheral devices. It detects a dial tone and the hook status of the external

telephone from the current flowing through the line.

When a dial tone is input from the telephone line, current flows through the line. The line current detec-

tion IC sends REVA1 and REVB1 to the ASIC as pulse signals. This allows a dial tone to be detected.

Signal Name

REVA1

REVB1

Type

Active

Description

Destination

Line 1 Current Detection Signal

IC23

Current Reverse Line 1 Current Detection

Signal

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4.2.5

CI detection circuit

NA/TW models

FAX board

MAIN board

NCU board

+12V

RLY2

CML relay

CML1 27

27 144

Q51

IC23

ASIC

5VPS

ZD1 ZD3 C1

Line

R79

17 CI1

65 162

D52

PC2

Fig. 4-10

The CI detection circuit consists of the photocoupler (PC2), ASIC (IC23) on the MAIN board and the

other peripheral devices to detect a ring signal input from the telephone line.

The ASIC makes the CML1 signal become LOW to connect the CI detection circuit to the telephone

line.

When a ring signal is input from the telephone line, the photocoupler is repeatedly turned ON/OFF. This

allows the CI1 signal to become a pulse signal and input to the ASIC on the MAIN board, thereby

detecting the ring signal.

Signal Name

CI1

Type

Active

Description

Line 1 CI Detect Signal

Destination

IC23

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NCU board

FAX board

MAIN board

RLY3

+12V

CML relay

CML1

27 144

5VPS

IC23

ASIC

ZD2 ZD3

Line

R34

PC1

CI1

65 162

R35

Fig. 4-11

The CI detection circuit consists of the photocoupler (PC1), ASIC (IC23) on the MAIN board and other

peripheral devices to detect a ring signal input from the telephone line.

The ASIC makes the CML1 signal become LOW to connect the CI detection circuit to the line. When a

ring signal is input from the telephone line, the photocoupler is repeatedly turned ON/OFF. This allows

Q5 to be turned ON/OFF and the CI1 signal to become a pulse signal and input to the ASIC on the

MAIN board, thereby detecting the ring signal.

Signal Name

CI1

Type

Active

Description

Destination

Line 1 CI Detection Signal

IC23

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4.2.6

Line monitor circuit

NA/TW models

NCU board

FAX board

28,29

]

[

25,26

IC2

RLY2

IC51

]

[

R67

R71

MODEM

CML relay

Analog

switch

IC53

MAIN board

TXOUT1

RXIN1

Line

IC53

R59

IC52

[

RING

SPKCLK

IC53

SoC

]

[

]

+12V

IC9

R66

R68

Analog

switch

[

]

9,10 TONESEL 59

11 RING/TONE 23

152

153

9,11 10

R273

[

]

R31

]

ATT3DB1

CML1

142

144

IC23

Q51

R272

[

]

R30

ASIC

[

SPVOL0

SPVOL1

SPVOL2

151

150

149

R271

]

[

R29

]

R270

]

[

R32

[

]

IC10

R268

[

Analog

switch

]

R35

R267

[

]

R33

R266

[

Speaker

]

R36

IC10

[

]

R37

SP+

SP-

Fig. 4-12

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NCU board

FAX board

28,29

]

[

25,26

IC2

]

RLY3

[

MODEM

CML relay

IC6

MAIN board

TXOUT1

RXIN1

IC3

Line

IC4

[

RING

SPKCLK

IC53

SoC

Analog

switch

]

[

]

IC6

+12V

R11

IC9

Analog

switch

[

]

9,10 TONESEL 59

11 RING/TONE 23

152

153

R273

[

]

R31

]

ATT3DB1

CML1

142

144

IC23

R272

[

]

R30

ASIC

[

SPVOL0

SPVOL1

SPVOL2

151

150

149

R271

[

]

R29

]

R270

[

]

R32

[

]

IC10

R268

[

Analog

switch

]

R35

R267

]

[

R33

R266

[

Speaker

]

R36

IC10

[

]

R37

]

SP+

SP-

Fig. 4-13

The line monitor circuit consists of the CML relay (NA/TW: RLY2, EU/AU/AS/C: RLY3), analog switch

(NA/TW: IC51, EU/AU/AS/C: IC3), analog switches (IC9, IC10) on the FAX board, ASIC (IC23) and

SoC (IC53) on the MAIN board, and other peripheral devices. It switches the telephone line path using

the analog switch and monitors the line status and ringer signal in the FAX transmission and reception

using the speaker connected to CN503 on the FAX board. It also switches the analog switch to output a

buzzer tone from the speaker.

The signal to be monitored is selected by switching the analog switch (IC9) according to TONESEL sig-

nal and RING/TONE signal which are output from the ASIC.

To monitor the line during the transmission and reception, the ASIC makes the CML1 signal become

HIGH to switch the analog switch and connect the line to the MODEM side.

For the line path switching control, refer to

P. 4 -4 "4.2.2 Line path switching control circuit".

The relation between the signal levels and monitoring signals is as follows.

Monitoring signal

LINE Monitor

Ringer/Alarm

TONESEL

RING/TONE

HIGH

LOW

GD-1220/1221

ELECTRICAL CIRCUITS

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The monitoring signal selected by IC9 is input to the analog switch (IC10) to select the output sound

volume. The sound volume is selected by switching IC10 according to the SPVOL0-2 signals output

from the ASIC and selecting an input resistance for the monitoring signal.

The relation between the signals and sound volume is as follows.

Sound volume

SPVOL2

SPVOL1

SPVOL0

Max. (7)

(6)

LOW

HIGH

LOW

(5)

LOW

HIGH

LOW

(4)

LOW

HIGH

LOW

(3)

HIGH

(2)

LOW

HIGH

LOW

Min. (1)

Silent (0)

HIGH

The monitoring signal whose volume is controlled by IC10 is amplified by the OP amplifier (IC17), then

output to the speaker.

Signal Name

Type

Active

Description

Destination

TONESEL

Line/Tone Selection Signal

IC9

RING/TONE

SPVOL0-2

Ring/Tone Selection Signal

Speaker Volume Control Signals 0-2

IC9

IC10

Values in [ ] are GD-1221 in case that the descriptions vary between GD-1220 and GD-1221.

GD-1220/1221

ELECTRICAL CIRCUITS

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4.3 PC Boards

1) PWA-F-FAX-635 (GD-1220)

Fig. 4-14

GD-1220/1221

ELECTRICAL CIRCUITS

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2) PWA-F-FAX-678 (GD-1221)

Fig. 4-15

3) PWA-F-NCU-631 (NAD, TWD, SAD)

Fig. 4-16

GD-1220/1221

ELECTRICAL CIRCUITS

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4) PWA-F-NCU-631 (MJD, AUD, ASD, CND)

Fig. 4-17

GD-1220/1221

ELECTRICAL CIRCUITS

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GD-1220/1221

ELECTRICAL CIRCUITS

4 - 18

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5. INSTALLATION

5.1 Explanation to the Users

After installing the FAX unit, explain the following items to the user using the Operator’s Manual.

With the underlined items, actually demonstrate the operation.

Items to be explained

•

Switches and control panel

Summary of the control panel (FAX functions)

After power is turned OFF, image data are kept in HDD.

•

How to set originals

Acceptable original size and scanning width

How to insert originals:

Multiple originals placed on the RADF are scanned from the first page.

Unacceptable originals

How to set the mode (image quality) and density (contrast)

•

Transmission method

Manual transmission

Monitor dialing

Direct dialing (with the digital keys)

Phone book dialing

Delayed transmission

Multi transmission

Redialing

•

Recording paper size

How to change the recording paper size

Automatic/manual reception

How to switch the automatic and manual reception

How the machine works and how to operate it when a FAX is received in these modes

Other functions

Memory reception (with the power kept ON)

How to set the power saving mode

Polling

Polling operation

How to operate the polling reception and transmission

How the multi-polling reception works and how to operate it

•

How to register addresses

How to register new addresses in the Phone Book

How to correct or erase the contents of the Phone Book

Group registration in the phone book for the multi-transmission or multi-polling

How to output lists

How to output the TRANSMISSION JOURNAL and RECEPTION JOURNAL

GD-1220/1221

INSTALLATION

5 - 1

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GD-1220/1221

INSTALLATION

5 - 2

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