Color Laser Printer
CLP-300 Series
CLP-300/XSG
:
Basic Model CLP-300
Manual
SERVICE
Samsung Color Laser Printer
The keynote of Product
[The keynote of Product]
[Series Model]
.CLP-300: B/W 16 ppm, Color 4 ppm, SPL-C
.CLP-300N: CLP-300 + Network
[Resolution]
. 2400 x 600 dpi
[CPU]
.Samsung CorrusM 170MHz
[Interface]
.CLP-300 : USB 2.0
.CLP-300N : USB 2.0, Ethernet 10/100 Base TX
[Consumables]
.2K black toner cartridge
.1K color toner cartridge
.Waste toner box
[Paper Handling]
.150 sheets Semi-cassette
.1 sheet manual slot
.150 sheet Face-Down
CLP-300
Contents
1. Precautions
1.1 Safety Warning
1-1
1-2
1-5
1-5
1.2 Caution for safety
1.3 ESD Precautions
1.4 Super Capacitor or Lithium Battery Precautions
2. Product Specification
2.1 Product Overview
2.2 Specifications
2-1
2-2
2-7
2.3 Model Comparison Table
3. System Overview
3.1 System Structure
3.2 Main PBA Description
3.3 CRUM
3-1
3-7
3-17
3-19
3.4 General Description
4. S/W Structure and Descriptions
4.1 Architecture
4-1
4-1
4-1
4-2
4-2
4-3
4-4
4-4
4.2 Language Monitor
4.3 Status Monitor
4.4 Network Interface
4.5 Printer Driver <-> Status Monitor
4.6 System F/W Flow
4.7 Alarm Shortage
4.8 Error status
Continued
4.9 CRUM Overview
4-5
4-5
4-6
4.10 FW Upgrade
4.11 Initailize Flow
5. Disassembly and Reassembly
5.1 Precautions When Replacing Parts
5.2 Parts for Maintenance and Repair
5.3 Information Related in Disassembly and Assembly
5.4 Disassembly Procedure
5-2
5-3
5-5
5-10
6. Alignment and Adjustments
6.1 Control Panel
6-1
6-2
6.2 Function
6.3 Jam Removal
6-6
6.4 Sample Pattern
6-9
6.5 Periodic Defective Image
6.6 How to use EDC (Engine Diagnostic Control) Mode
6.7 Error Message
6-10
6-11
6-17
7. Troubleshooting
7.1 Procedure of Checking the Symptoms
7.2 Troubleshooting Checklist
7-1
7-2
7.3 Solving General Printing Problems
7.4 Solving Print Quality Problems
7.5 Common Windows Problems
7.6 Common Macintosh Problems
7.7 Common Linux Problems
7-3
7-7
7-11
7-11
7-12
7-15
7.8 Major Problems Trouble shooting
Continued
8. Exploded Views & Parts List
8.1 Main
8-2
8-3
8.2 Top Cover
8.3 Rear Cover
8.4 Front Cover
8.5 Main Driver
8.6 Main Frame
8.7 LSU Cover
8.8 Fuser Unit
8.9 ELA-UNIT OPC DEV
8.10 ITB Unit
8-4
8-5
8-6
8-8
8-10
8-11
8-12
8-13
8-14
8.11 Casstte Unit
9. Block diagram
9.1 Block Diagram
9-1
10. Connection Diagram
10.1 Connection Diagram
10-1
11. Schematic Diagram
11.1 Main Board
11.2 Panel
11-1
11-16
11-17
11-18
11-19
11-20
11-21
11.3 DEVE INF
11.4 ITB INF
11.5 SMPS-110V
11.6 SMPS-220V
11.7 HVPS
Continued
12. Reference Information
12.1 Tools for Troubleshooting
12-1
12-2
12-4
12-5
12.2 Acronyms and Abbreviations
12.3 Select a location for the printer
12.4 A4 ISO 19752 Standard Pattern
Precautions
1. Precautions
In order to prevent accidents and to prevent damage to the equipment please read the precautions listed
below carefully before servicing the printer and follow them closely.
1
1.1 Safety Warning
(1) Only to be serviced by appropriately qualified service engineers.
High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably
trained and qualified service engineer.
(2) Use only Samsung replacement parts
There are no user serviceable parts inside the printer. Do not make any unauthorized changes or
additions to the printer, these could cause the printer to malfunction and create electric shock or fire hazards.
(3) Laser Safety Statement
The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for
Class 1(1) laser products, and elsewhere, it is certified as a Class I laser product
conforming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The
laser system and printer are designed so there is never any human access to laser radiation above a Class I
level during normal operation, user maintenance, or prescribed service condition.
Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The
reflected beam, although invisible, can damage your eyes. When using this product, these basic safety
pre-cautions should always be followed to reduce risk of fire, electric shock, and injury to persons.
CAUTION - INVISIBLE LASER RADIATION
WHEN THIS COVER OPEN.
DO NOT OPEN THIS COVER.
VORSICHT - UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GE FFNET.
NICHT DEM STRAHL AUSSETZEN.
ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS
D OUVERTURE. EXPOSITION DANGEREUSE
AU FAISCEAU.
ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI
APERTURA. EVITARE L ESPOSIZIONE AL
FASCIO.
PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.
EVITAR EXPONERSE AL RAYO.
ADVARSEL. - USYNLIG LASERSTR LNING VED BNING, N R
SIKKERHEDSBRYDERE ER UDE AF FUNKTION.
UNDG UDSAETTELSE FOR STR LNING.
ADVARSEL. - USYNLIG LASERSTR LNING N R DEKSEL
PNES. STIRR IKKE INN I STR LEN.
UNNG EKSPONERING FOR STR LEN.
VARNING - OSYNLIG LASERSTR LNING N R DENNA DEL
R PPNAD OCH SP RREN R URKOPPLAD.
BETRAKTA EJ STR LEN. STR LEN R FARLIG.
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLET ALTTIINA N KYM TT M LLE LASER-
S TEILYLLE L KATSO S TEESEEN.
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Samsung Electronics
Precautions
1.2 Caution for safety
1.2.1 Toxic material
This product contains toxic materials that could cause illness if ingested.
(1) If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the skin
should be avoided, wash any splashes from eyes or skin immediately and contact your doctor. If the liquid gets into
the mouth or is swallowed see a doctor immediately.
(2) Please keep toner cartridges away from children. The toner powder contained in the toner cartridge may be harmful
and if swallowed you should contact a doctor.
1.2.2 Electric Shock and Fire Safety Precautions
Failure to follow the following instructions could cause electric shock or potentially cause a fire.
(1) Use only the correct voltage, failure to do so could damage the printer and potentially cause a fire or electric
shock.
(2) Use only the power cable supplied with the printer. Use of an incorrectly specified cable could cause the cable
to overheat and potentially cause a fire.
(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could lead to
a fire.
(4) Do not allow water or other liquids to spill into the printer, this can cause electric shock. Do not allow paper
clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric
shock or fire hazard..
(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When
servicing the printer remove the power plug from the wall socket.
(6) Use caution when inserting or removing the power connector. The power connector must be inserted com-
pletely otherwise a poor contact could cause overheating possibly leading to a fire. When removing the power
connector grip it firmly and pull.
(7) Take care of the power cable. Do not allow it to become twisted, bent sharply round corners or otherwise
damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and
cause a fire or exposed cables could cause an electric shock. Replace a damaged power cable immediately,
do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable,
weakening the cover or exposing cables causing fire and shock risks.
(8) Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should be
repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.
(9) Use caution during thunder or lightening storms. Samsung recommend that this machine be disconnected from
the power source when such weather conditions are expected. Do not touch the machine or the power cord if it
is still connected to the wall socket in these weather conditions.
(10) Avoid damp or dusty areas, install the printer in a clean well ventilated location. Do not position the machine
near a humidifier. Damp and dust build up inside the machine can lead to overheating and cause a fire.
(11) Do not position the printer in direct sunlight. This will cause the temperature inside the printer to rise possibly
leading to the printer failing to work properly and in extreme conditions could lead to a fire.
(12) Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could
make contact with a high voltage conductor inside the machine and cause an electric shock.
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Precautions
1.2.3 Handling Precautions
The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer
(1) Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause
the printer to tip or fall.
(2) The printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers,
hair or clothing in any of these rotating devices.
(3) Do not place any small metal objects, containers of water, chemicals or other liquids close to the printer which if
spilled could get into the machine and cause damage or a shock or fire hazard.
(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a
humidifier or heater. Damage could be caused to the printer in such areas.
(5) Do not place candles, burning cigarettes, etc. on the printer, these could cause a fire.
1.2.4 Assembly / Disassembly Precautions
Replace parts carefully, always use Samsung parts. Take care to note the exact location of parts and also
cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.
Please carry out the following procedures before dismantling the printer or replacing any parts.
(1) Check the contents of the machine memory and make a note of any user settings. These will be erased if the
mainboard is replaced.
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.
(3) Disconnect printer interface cables and power cables.
(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or temperature
rating are correct.
(5) When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.
(6) Take care not to drop any small parts into the machine.
(7) Handling of the OPC Drum
- The OPC Drum can be irreparably damaged if it exposed to light.
Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room
lighting. Exposure for as little as 5 mins can damage the surface’s photoconductive properties and will result
in print quality degradation. Take extra care when servicing the printer. Remove the OPC Drum and store it in
a black bag or other lightproof container. Take care when working with the covers(especially the top cover)
open as light is admitted to the OPC area and can damage the OPC Drum.
- Take care not to scratch the green surface of OPC Drum Unit.
If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.
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Precautions
1.2.5 Disregarding this warning may cause bodily injury
(1) Be careful with the high temperature part.
The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to cool
down before disassembly.
(2) Do not put finger or hair into the rotating parts.
When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor, fan,
etc.). If do, you can get harm.
(3) When you move the printer.
This printer weighs 13.6kg including Consumables. Use safe lifting and handling techniques. Back injury could
be caused if you do not lift carefully.
(4) Ensure the printer is installed safely.
The printer weighs 13.6Kg, ensure the printer is installed on a level surface, capable of supporting its weight.
Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer.
(5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is stable.
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Samsung Electronics
Precautions
1.3 ESD Precautions
Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called
“Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field
effect transistors, and semiconductor “chip” components.
The techniques outlined below should be followed to help reduce the incidence of component damage caused by
static electricity.
Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially avail-
able wrist strap device, which should be removed for your personal safety reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as
aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assem-
bly.
3. Use only a grounded tip soldering iron to solder or desolder ESDs.
4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can
generate electrical charges sufficient to damage ESDs.
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to dam-
age ESDs.
6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most
replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a compa-
rable conductive material.
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the pro-
tective material to the chassis or circuit assembly into which the device will be installed.
8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until com-
pletely plugged or soldered into the circuit.
9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing
together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to
damage an ESD.
1.4 Super Capacitor or Lithium Battery Precautions
1. Exercise caution when replacing a super capacitor or Lithium battery. There could be a danger of explosion and
subsequent operator injury and/or equipment damage if incorrectly installed.
2. Be sure to replace the battery with the same or equivalent type recommended by the manufacturer.
3. Super capacitor or Lithium batteries contain toxic substances and should not be opened, crushed, or burned for
disposal.
4. Dispose of used batteries according to the manufacture’s instructions.
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Product Specifications
2. Product Specifications
2.1 Product Overview
2
Item(s)
Pages Printed
Part number
Remark
User
Black toner
cartridge
Approx. Initial : 1,500 pages*
CLP-K300A
Sales : 2,000 pages*
Replacement
Color toner
cartridge
Approx. Initial : 700 pages*
CLP-C300A : Cyan
CLP-M300A : Magenta
CLP-Y300A : Yellow
Sales : 1,000 pages*
Imaging unit
Approx. 20,000 black
pages or approx.
CLP-R300A
12,500 color pages
Waste toner
container
Approx. 5,000 images**
or Approx. 1,250 pages
(fulll color Standard image)
CLP-W300A
Pick-up roller
Fuser unit
Approx. 50,000 pages
Contact a service
representative
Engineer
Approx. 100,000 black pages
or 50,000 color pages
Replacement
T2 roller
ITB
Approx. 100,000 pages
Approx. 60,000 black pages
or 15,000 color pages
* Average A4-/letter-sized page count based on Standard coverage of individual colors on each page.
Usage conditions and print patterns may cause results to vary.
** Image counts based on one color on each page. If you print documents in full color (Cyan, Magenta,
Yellow, Black), the life of this item will be reduced by 25%.
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Product Specifications
2.2 Specifications
Specifications are correct at the time of printing. Product specifications are subject to change without notice.
See below for product specifications.
2.2.1 General Specifications
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Product Specifications
2.2.2 Controller & S/W
∫∞
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Product Specifications
2.2.3 Paper Handling
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Samsung Electronics
Product Specifications
2.2.4 Consumables
CRU
No. of CRUs
6 (C/M/Y/K toner, Imaging Unit, Waste toner container)
K toner cartridge: CLP-K300A
C toner cartridge: CLP-C300A
M toner cartridge: CLP-M300A
Y toner cartridge: CLP-Y300A
Imaging unit : CLP-R300A
Waste toner container: CLP-W300A
Toner
Black
: Initial : 1,500 (Sales : 2,000) A4/Letter pages,
at ISO 19752 Standard Coverage,Semi glossy
Color
Initial : 700 (Sales : 1,000) A4/Letter pages,
at ISO 19752 Standard Coverage Semi glossy
KeyUnique,
Life detect
Electronic
(CRUM)
key
Sensor (Y)Remain % (90% : warning,100%: empty,
120% : hardstop)
Imaging Kit(OPC+Deve)
Waste Toner Container
Yield
Approx. 20K black pages (or 12.5K color pages)
KeyUnique,
Sensor
Electronic
(CRUM)
key
None, that would be traced via software
Replace method
Yield
6 steps for install/replacing
1,250 sheets (Full Color Std. Image) or 5,000 images, Full Sensor
KeyN/A
FRU
No. of FRUs
ITB
4 (ITB, Fuser, T2 roller, Pick-up roller)
Yield
Approx. 60K black pages (or 15K color pages)
KeyNone
Sensor
Yield
None
Fuser
100,000 sheets B&W or 50,000 sheets Color
KeyNone
Yield
T2 Roller
Pick-up Roller
100,000 sheets, Replacable
KeyNone
Yield
50,000 sheets, Replacable
KeyNone
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Product Specifications
2.2.5 Environment
2.2.6 Options
2.2.7 Accessory
INA-ACCESSORY
JC99-02015A
-
CBF-POWER CORD
3903-000042
6902-000288
JC46-00257A
BAG PE
S/W APPLICATION-CD
S/W APPLICATION-CD
JC46-00313A
JC68-00690A
JC68-01584A
MANUAL-(CARD)WARRANTY CARD
LABEL(P)-BLANK 90*25
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Product Specifications
2.3 Model Comparison Table
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Samsung Electronics
System Overview
3. System Overview
This chapter describes the functions and operating principles of the main components.
3
3.1 System Structure
3.1.1 Main Parts of System
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Samsung Electronics
System Overview
Cassette
Feeding Method : Cassette Type
Feeding Standard : Center Loading
Feeding Capacity : Cassette 150 Sheets(75g/ , 20lb Paper Standard)
No Manual Feeder
Paper Detecting Sensor : Photo Sensor (Empty, Registration, Exit)
Paper Size Sensor : None
LSU(Laser Scan Unit)
Consisted of LD(Laser Diode) and Polygon Motor Control.
Error
Phenomenon
Polygon Motor Error
Hsync Error
The Rotation of Polygon Motor can not reach stable
Though the rotation of Polygon Motor reach stable, the sig-
nal of Hsync is not occurred
2nd Transfer Ass y
The life span: Print over 100,000 sheets (in 15~30
Specification: Similar to CLP-500 Series
)
Fuser Ass y
Heat Lamp : New Part - Knuckle Type
Heat Roller : Similar to CLP-500 Series
2 Pressure Roller : One is similar to HummingBird, the Other is a new added part comparing with
other Fuser
Thermistor - Temperature-Measuring Device
Thermostat - Critical Temperature-Detecting Device
&
&
ITB(Intermediate Transfer Belt) & 1st Transfer Roller
The life span: Print over 100,000 Images
The ITB unit includes 1st Transfer Roller
OPC(Organic Photo-Conductor) & Developer
The life span: Print over 44,000 Images (Both)
Imagine Unit consists of 4 kinds of Developer , OPC, and Deve. Main Frame
Toner Kits
The life span: Color -> Initial 700 / Sales 1,000 images (ISO 19752 Standard Coverage Print-Out)
Black -> Initial 1,000 / Sales 2,000images (ISO 19752 Standard Coverage Print-Out)
Driver Ass y
It is a power delivery unit by gearing
By driving the motor, it supplies the power to the feeding unit, the fusing unit, and the distributing unit.
The Main Motor is similar to CLP-500 Series Main Motor.
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System Overview
3.1.2 EP Process
- Structure of EP Process
P1: Image
on OPC
Blade
ITB Unit
P2: Image
on Media
Media Path
OPC
Blade
Eraser
Charger
~
Developer
Laser Scanning Unit
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System Overview
- System Outline
Paper path
Exit
Fuser
Toner
Cartridge
Dev-Y
Dev-M
Dev-C
OPC
ITB
Dev-K
LSU
Cassette
Charging
Conductive Roller charging
Roller resistivity : ~ 10^5 ohm-cm
Applied voltage : -1.1kV
Charge acceptance : -520V
OPC coating thickness : 21um
OPC diameter : 60mm
Non eraser system
1. Organic Photoconductor is charged to uniform voltage by conductive roll charging method
2. No ozone is produced because corona is not used
3. Charger roll is cleaned with cleaning roll
4. Toner remained on OPC after T1 process is cleaned by cleaning blade and retrieved into waste toner
box by auger and belt driving mechanism
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System Overview
Exposing
One polygon motor ( 6 facet )
Single beam LD (1ea)
LD wavelength : 785nm
Polygon motor rpm : 23747.5
LSU energy : 0.25uJ/cm^2
OPC exposed potential : -50V
1. Exposing is implemented by laser striking on to OPC with uniform potential
2. Laser beam is modulated according to image to be printed that is from PC
3. Latent Image is formed on OPC, which is developed with toner
Developing
Non-magnetic, mono component
Non-contact development
Developing bias : DC + AC
AC peak to peak : 1.5 ~ 2.0kV
Mass on developing roller : 550 ~ 600ug/cm^2
Toner coulomb : 15 ~ 20uC/g
Roller diameter : 10mm
Roller resistivity : 10^5 ~ 10^6 ohm-cm
Process speed ratio : 1.2 (OPC=1.0)
Color order : Y -> M -> C -> K
1. Only latent image formed by exposing process is developed with toner
2. AC + DC Voltage is being used to develop toner into latent image on OPC because non-contact
developing method is adopted
3. Y, M, C, and K Images are sequentially developed onto OPC and transferred onto Intermediate
Transfer Belt (hereafter ITB) to form a color image on ITB
4. Toner Bottles are used to supply toner into developer compartment
5. Toner level is being sensed to control toner supply from toner bottle to developer
Transfer 1
Multi-pass transfer
Indirect transfer
Transfer voltage : 0.5 ~ 2.0kV (controllable)
Roller diameter : 14mm
Roller resistivity : ~ 10^7 ohm-cm
Belt resistivity : 10^9 ~ 10^11 ohm-cm
Environment sensing by Y-transfer roller
Transfer unit life : 50K images
1. Developed Image on OPC is transferred onto ITB by T1 Process
2. T1 Voltage is positive which attract toner to ITB
3. 4 times of T1 process is required to make a color image on ITB, which means multi-pass process
4. ITB has a hole as a fiducial mark for timing. Engine control for color image is synchronous with it,
ITB Home Sensing Signal
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System Overview
Transfer 2
Indirect transfer
Transfer voltage : 1 ~ 4.0kV (controllable)
Roller diameter : 18.6mm
Roller resistivity : ~ 10^7 ohm-cm
Belt resistivity : 10^9 ~ 10^11 ohm-cm
Transfer unit life : 50 K images
1. Color image formed on ITB is transferred onto media by T2 process
2. T2 voltage is also positive to get color image moved onto media
3. Toner remained on ITB after T2 process is cleaning by ITB cleaning blade and collected and
4. Transported and retrieved into waste toner box by auger and belt driving system
5. T2 Roll is engaged when color image is being transferred onto media. Otherwise it is disengaged. Clutch is used
for driving T2 Roll engagement and disengagement
Fusing
3 Roll system
-> short warm-up time (45sec)
Post Pressure Roll
1. Color Image on media is melted down and fixed into media by fusing process
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System Overview
3.2 Main PBA Description
3.2.1 Main Controller PBA
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System Overview
3.2.2 Main PBA
RJ45
USB
Connector
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System Overview
3.2.3 Main PBA Description
1) CHORUSm
CHORUSm involves in itself the functions to control ARM Processor Core and various H/W devices. CHORUSm,
therefore, controls Main PBA and all engine mechanism, processing the print job received from host and enabling the
engine to print image.
Function
Process
0.13um Technology
Package
496 PBGA
CPU Core
ARM 920T - 300MHz
Cache : I-Cache 16KB, D-Cache 16KB
System Bus
32-bit width, 100MHz
SDRAM Controller
32-bit width, 100MHz operation
5 Banks, Up to 128MB Address space per Bank
Programmable Timing to Control SDRAM A.C Characteristics
Support Self Refresh for Data Retention
ROM Controller
32-bit width, 4 Banks, Up to 16MB Address space per Bank
Burst Capability
Programmable Timing per Bank
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System Overview
IO Controller
6 Channels, Up to 16MB Address space per Bank
Programmable Timing per Bank
DMA Controller
6 Channels General Purpose DMA
HPVC Controller
Hyper Printer Video Controller
High Performance DMA-based Interface to Printer Engine
Support Dual/Single Beam LSU, LVDS Video Output
Support A3, 1200dpi
UART Controller
5 Channels Indepenent Full Duplex UART
Interrupt Controller
Support 6 External Interrupts
Support 26 Internal Interrupts
Timer Controller
6 System Timers and Watch Dog Timer for S/W Trap
Scanner Controller
300/400/600/1200dpi CIS/CCD Interface
Color/Mono grey image, Binary image scan support
600dpi Color/Mono Copy support
Image Processing for High-End MFP,Digital Copier
MH/MR/MMR CODEC for Fax
Scan image : A4 1200dpi processing
Copy image : A4 600dpi processing
MAC Controller
10/100Mbps
Full IEEE 802.3 compatibility
PPI Controller
IEEE1284 compliant parallel port interface
DMA-Based or Interrupt-Based operation
GEU Controller
Graphic Engine Unit for Banding support of Printer Language
Scan Line Buffer, Polygon Filling
CODEC Controller
2 Channels JBIG Encoding and Decoding
I2C Controller
1 Channel, Operated at max frequency 400kHz
RTC Controller
Engine Controller
LSU Control and Interface Unit
2 Channels STEP Motor Control Unit
8 Channels PWM Control Unit
8 Channels ADC Control Unit
2 Channels DAC Control Unit
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System Overview
CHORUSm (Internal Block Diagram)
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System Overview
2) System Memory Block
Memory saves program and video data and print jobs received from host. Its volume is 64MB with network function
and 32MB without network function. It has no separate device for extension. SDRAM is used, driven at width of 32-bit
and 100MHz, and controlled by memory controller built in CHORUSm.
3) Flash Memory Block
Flash memory is the space used for saving program. Its volume is 4MB with network function and 2MB without net-
work function. It has no separate device for extension. NOR type flash memory is used and accessed at 32-bit width
burst, being controlled by the ROM controller built in CHORUSm.
4) USB2.0 Device Block
This block supports USB2.0 high speed (480Mbps). ISP1582 of Philips company is used and connected to the IO
Bus of CHORUSm at 16-bit, controlled by IO controller built in CHORUSm. Through this I/O port it receives print job
from host.
5) Network Block
This block has 10/100Mbps wired network function and is controlled by MAC controller built in CHORUSm. It is con-
nected to host through physical layer chip outside, and thus receives print job from host. STE100P is used for physi-
cal layer chip.
6) EEPROM Block
System EEPROM is controlled by the I2C controller built in CHORUSm, connected to the other non-volatile memory
on I2C bus. It works at the speed of 400KHz. This system EEPROM contains all drive information and production
information necessary for the operation of printer. Its size is 16k-bit.
7) OPE Control
The panel is driven in the form of PIO by GPIO controller built in CHORUSm. OPE consists of one key and four
monochrome LED, and one dual LED.
8) LSU Control
Laser Scanning Unit is controlled by LSU controller built in CHORUSm. It makes use of all functions such as Polygon
Mirror Motor Control necessary for driving LSU and Synchronized Signal Generation Control, and helps to scan laser
beam on the photosensitive drum to form latent image.
9) BLDC Control
It is controlled by BLDC controller built in CHORUSm. It controls the drive of printer mechanism and helps it to be dri-
ven at an equal speed.
10) Sensors Control
GPIO controller built in CHORUSm collects the status of all sensors. According to this status of sensors, it controls
printer mechanism to help normal printing. There are sensors such as Paper Empty Sensor, Registration Sensor and
Developer Home Sensor, etc.
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11) Clutches Control
GPIO Controller built in CHORUSm controls all clutches, which help printer to do print job normally. There are clutch-
es such as Paper Pick-up Clutch, Registration Clutch, Developer Home Clutch, ITB Clutch, T2 Clutch, Fuser Clutch,
Developer Toner Supply Clutch, etc.
12) PWM Control
PWM Controller built in CHORUSm controls the parts that require PWM for normal printing, such as BLDC drive
speed and HVPS high voltage level, etc.
13) ADC Control
It is controlled by ADC Controller built in CHORUSm, and is used for perception of charged voltage and current, 1st
and 2nd transfer voltage and current, fusing temperature, used-up toner and toner amount, and interior temperature,
etc.
14) DAC Control
It is controlled by DAC Controller built in CHORUSm and used to set standard level of light amount of LSU Laser
Diode.
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System Overview
3.2.4 SMPS(Switching Mode Power Supply) PBA
SMPS is consisted of SMPS part which supplies DC power for driving system and AC Heat Control part which supplies
power to Fuser. Standard TYPE III is used.
1) DC Output
Main Controller PBA, OP Panel, BLDC, Sensors, Clutches, Other PBAs
2) AC Output
Fuser Unit(Heat Lamp, Thermostat)
3) Output Voltage
CHANNEL
V_out
+5.0V
+24V
+24VF
+5.0V +/-5%
+24.0V +15%/-10%
LSU
+24.0V +15%/-10%
Load
MicroController,
CMOS, LOGIC
MOTOR, CLUTCH,
HVPS
CON3 To Main PBA
CON1 AC Input
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