ML-1640/ML-2240
Model : ML-1645/XEV
Basic Model : ML-1640
SERVICE
LASER PRINTER
Manual
The keynote of Product
- Speed
ML-1640 : 16 ppm (A4), 17 ppm( Ltr)
ML-2240 : 22ppm (A4), 23 ppm (Ltr)
- Emulation : GDI
- Processor : 150 Mhz Jupiter4e CPU
- Memory : 8 MB
- Toner cartridge : Initial (0.7K), Sales (1.5K)
- MP tray : Only ML-2240
- Interface : Full Speed USB 2.0
- Machine life : 50K (pages)
ELECTRONICS
GSPN (Global Service Partner Network)
North America : service.samsungportal.com
Latin America : latin.samsungportal.com
CIS : cis.samsungportal.com
Europe : europe.samsungportal.com
China : china.samsungportal.com
Asia : asia.samsungportal.com
Mideast & Africa : mea.samsungportal.com
Samsung Electronics Co.,Ltd. January 2008
Printed in Korea.
VERSION NO. : 1.00
CODE : 1645-D00XEV
Contents
1. Precautions
1.1 Safety Warning
1.2 Caution for safety
1.3 ESD Precautions
1-1
1-2
1-4
2. Product spec and feature
2.1 Product Specifications
2.1.1 Product Overview
2.1.2 Specifications
2.1.3 Model Comparison Table
2.1.4 Accessory List
2.2 System Overview
2.2.1 System Outline
2.2.2 H/W Structure and Descriptions
2.2.3 S/W Structure and Descriptions
2.2.4 Initial Product Installation
2-1
2-1
2-1
2-5
2-5
2-6
2-6
2-12
2-25
2-29
3. Disassembly and Reassembly
3.1 General Precautions on Disassembly
3.2 Disassembly and Reassembly
3.2.1 Front Cover
3.2.2 Main Cover
3.2.3 Fuser unit
3.2.4 SMPS board
3.2.5 Main PBA
3.2.6 Drive unit
3.2.7 LSU
3-1
3-2
3-2
3-3
3-4
3-5
3-5
3-6
3-7
Continued
3.2.8 HVPS board
3.2.9 Transfer roller
3.2.10 Pick up roller
3-7
3-8
3-8
4. Alignment & Troubleshooting
4.1 Alignment and Adjustments
4.1.1 Sample Pattern
4.1.2 Control Panel
4.1.3 Consumables and Replacement Parts
4.1.4 Periodic Defective Image
4.1.5 How to use DCU
4.1.6 Paper Path
4.2 Troubleshooting
4.2.1 Checking Symptoms
4.2.2 Bad discharge
4.2.3 Malfunction
4.2.4 Bad Software Environment
4.2.5 Bad image
4-1
4-1
4-3
4-6
4-7
4-8
4-13
4-18
4-18
4-21
4-28
4-37
4-42
5. Exploded Views & Parts List
5.1
5.2
5.3
5.4
5.5
5.6
Main Assembly
Frame Assembly(ML-2240)
Frame Assembly(ML-1640)
Fuser Unit
Paper Path Unit
MP Tray Assembly (Only ML-2240)
5-2
5-5
5-7
5-9
5-11
5-13
Continued
6. System Diagram
7
Reference Information
7.1 Troubleshooting Tools
7.2 Acronyms and Abbreviations
7.3 Selecting printer locations
7.4 Sample Tests Patterns
7.5 Parts Life Cycle Maintenance Table
7.5.1 Parts Life Cycle Maintenance Table
7.5.2 Toner Cartridge Criterion
7.6 Model Information
7.6.1 Understanding for Model Code
7.6.2 Understanding Material Code & Name
7.6.3 F/W Upgrade Method
7-1
7-2
7-4
7-5
7-6
7-6
7-6
7-7
7-7
7-8
7-8
Precautions
1. Precautions
The cautions below are items needed to keep in mind when maintaining and servicing.
Please read carefully and keep the contents in mind to prevent accidents while servicing and to prevent the
machine from getting damaged.
1.1 Safety Warning
(1) Request service by qualified service person.
Service for this machine must be performed by a Qualified service person. It is dangerous if unqualified service personnel or users try to fix the machine.
(2) Do not rebuild.
Do not attach or change parts discretionary. Do not dissemble, fix of rebuilt it. If so, printer will abnormally
work and electric shock or fire may occur.
(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, 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 precautions should
always be followed to reduce risk of fire, electric shock, and injury to persons.
Service Manual
1-1
Samsung Electronics
Precautions
1.2 Safety Caution
1.2.1 Noxious Material Precaution
The toner in a printer cartridge contains a chemical material, which may harm human body if it is swallowed.
Please keep children out of reach of the toner cartridge.
1.2.2 Electric Shock or fire Precaution
It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.
(1) Use exact voltage. Please use an exact voltage and wall socket. If not, a fire or an electric leakage can be
caused.
(2) Use authorized power cord. Do use the power cord supplied with PRINTER. A fire can happen when over current flows in the power cord.
(3) Do not insert many cords in an outlet. A fire can be occurred due to flow over current in an outlet.
(4) Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc. It
can cause a fire, electric shock, or malfunction. If this occurs, turn off the power and remove the power plug
from outlet immediately.
(5) Do not touch the power plug with wet hand. When servicing, remove the power plug from outlet. Do not insert
or take off it with wet hand. Electric shock can be occurr.
(6) Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not, a fire
can be caused due to poor contact. When taking off the power plug, grip the plug and take it off. If grip the line
and pull over, it could be damaged. A fire or electric shock could happen.
(7) Management of power cord. Do not bend, twist, or bind it and place other materials on it. Do not fix with staples. If the power cord gets damaged, a fire or electric shock can happen. A damaged power cord must be
replaced immediately. Do not repair the damaged part and reuse it. A repaired part with plastic tape can be
cause a fire or electric shock. Do not spread chemicals on the power cord. Do not spread insecticide on the
power cord. A fire or electric shock can be happen due to thinner(weak) cover of the power cord.
(8) Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or not.
When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when moving the
machine.
(9) Caution when there is thundering or lightning, and being flash of lightening. It causes a fire or electric shock.
Take the power plug off there is thunder. Do not touch cable and device when thundering and flash of lightening.
(10) Avoid the place where is moisture or has dust. Do not install the printer where lots of dust or around humidifier. A fire can occurred. A plug part need to clean well with dried fabric to remove dust. If water drops are
dripped on the place covered with dust, a fire can occurred.
(11) Avoid direct sunlight. Do not install the printer near window where direct contacts to the sunlight. If the
machine contacts sunlight long time, the machine cannot work properly because inner temperature of the
machine is getting hotter. A fire can occur.
(12) Turn off the power and take off the plug when smoke, strange smell, or sound from the machine. If you keep
using it, a fire can be occurred.
(13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a ventilator. An electric shock could happened.
Service Manual
1-2
Samsung Electronics
Precautions
1.2.3 Handling Precautions
If you ignore this information, you could harm machine and could be damaged.
(1) Do not install it on different levels, or slanted floor.
Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be happened due to the machine falling over.
(2) Be careful not to insert a finger or hair in the rotating unit.
Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the
machine is operating. Once it happens, you could be harmed.
(3) Do not place a pot containing water/chemical or small metals. If they got caught into the inner side of
machine, a fire or electric shock can be occurred.
(4) Do not install it where lots of moisture or dust exists or where raindrop reaches. A fire or electric shock
can be caused.
(5) Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A
fire can be occurred.
1.2.4 Assembly/Disassembly precaution
When replacing parts, do it very carefully. Memorize the location of each cable before replace parts for reconnecting it afterwards. Do memorize. Please perform the steps below before replace or disassembly the parts.
(1) Check the contents stored in the memory. All the information will be erased after replacing main board.
The information needed to keep has to be written down.
(2) Before servicing or replacing electric parts, take off a plug.
(3) Take off printer cables and power cord connected to printer.
(4) Do use formal parts and same standardized goods when replacing parts.Must check the product name,
part cord, rated voltage, rated current, operating temperature, etc.
(5) Do not give an over-force when release or tighten up the plastic parts.
(6) Be careful not to drop the small parts such as screws in the printer.
(7) Be careful not to change the location of small parts such as screws when assembling and disassembling.
(8) Do remove dust or foreign matters completely to prevent fire of tracking, short, or etc.
(9) After finished repair, check the assembling state whether it is same as before the repair or not.
Service Manual
1-3
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 available 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
assembly.
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 damage 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 comparable conductive material.
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the
protective 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
completely 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.
Service Manual
1-4
Samsung Electronics
Product spec and feature
2. Product specification and feature
2.1 Product Specifications
2.1.1 Product Overview
Item
Descriptions
Model name
ML-1640/ML-2240
Marketing target
Personal use
Main Specification
* speed
ML-1640 : 17 ppm (Ltr) / 16 ppm (A4)
ML-2240 : 23 ppm (Ltr) / 22 ppm (A4),
* 150MHz Jupiter4e CPU/ 8M memory
* Toner Cartridge : Initial (0.7K), Sales (1.5K)
* Machine Life : 50K
2.1.2 Specifications
Product Specifications are subject to change without notice. See below for product specifications.
2.1.2.1 General Specifications
Item
Major Features
ML-1640
Print
ML-2240
Print
Size (W*D*H)
353mmx298mmx213mm
353mmx298mmx213mm
(13.9"x11.7"x8.4")
(13.9"x11.7"x8.4")
Net Weight (Inc. Toner Cartridge)
5.7kg
5.9kg
Net Weight (exc. Toner Cartridge)
4.95kg
5.05kg
Gross Weight (with package)
7.1Kg
7.5Kg
LCD
N/A (one button, 2 LED)
N/A (one button, 2 LED)
I/O Interface
USB2.0 Full-Speed
USB2.0 Full-Speed
MPU
Power Consumption
Power Supply
Noise
Jupiter4e / 150MHz
Jupiter4e / 150MHz
Printing Operation
300W
350W
Sleep Mode
6 Wh Energy Star Compliant
6Wh Energy Star Compliant
Power Switch
Yes
Yes
Input Voltage
Low Voltage : 110 ~ 127VAC
Low Voltage : 110 ~ 127VAC
High Voltage : 220 ~ 240VAC
High Voltage : 220 ~ 240VAC
Input Frequency
50 / 60Hz(+/- 3Hz)
50 / 60Hz(+/- 3Hz)
Printing
50dBA
51dBA
Standby
26dBA
32dBA
5000pages
10,000pages
Max. Monthly Volume Print
(Duty Cycle)
Service Manual
2-1
Samsung Electronics
Product spec and feature
Item
Average Monthly Print Volume
ML-1640
140pages
ML-2240
170pages
Machine Life
50,000pages
50,000pages
Operating
10~32
10~32
Non Operating
-20~40
-20~40
Operating
20~80%
20~80%
Non Operating
10~90%
10~90%
Max 8,200ft
Max 8,200ft
Item
Print Speed
ML-1640
17ppm/Ltr, 16ppm/A4 (600 dpi)
ML-2240
23ppm/Ltr, 22ppm/A4 (600 dpi)
Print Emulation
GDI,
GDI,
Auto Emulation Sensing
YES
YES
Temperature
Humidity
Altitude
2.1.2.2 Print Engine
Font
Type
N/A
N/A
Number
N/A
N/A
Power Save
Yes(5/10/15/20/30/45/60/120min.)
Yes(5/10/15/20/30/45/60/120min.)
Resolution
600x600dpi
600x600dpi
Toner Save
FPOT
Yes (No dedicated button on CP)
Yes (No dedicated button on CP)
From Stand by
Approx. 10 seconds (From LSU 'ON', A4)
Approx. 10 seconds (From LSU 'ON', A4)
From Sleep mode
Less than 40 seconds
Less than 19 seconds
Duplex Print
N.A
N.A
Printable Area
208 x 273 mm (Letter)
208 x 273 mm (Letter)
Halftone(Gray Scale)
128levels
128levels
Standard / Max.
8MB/8MB(Std./Max)
8MB/8MB(Std./Max)
Type
SDRAM
SDRAM
Expand Memory Slot
N/A
N/A
Memory
Service Manual
2-2
Samsung Electronics
Product spec and feature
2.1.2.3 Paper Handling
Item
Capacity(20 lbs)
Main Tray
ML-1640
150sheets
ML-2240
150sheets
Bypass
N/A
N/A
Optional Cassette
N/A
N/A
Output Capacity
Face Down: 50Sheets/20lb
Face Down: 100Sheets/20lb
Face down
Face down
Paper Size
Output Control
Auto Feeding
A4, Letter, Legal, Oficio, Folio, Executive,
JIS B5, ISO B5, A5, A6,
Envelop 10 DL C5 C6 73/4
A4, Letter, Legal, Oficio, Folio, Executive,
JIS B5, ISO B5, A5, A6,
Envelop 10 DL C5 C6 73/4
Paper Weight
Auto Feeding
16~24 lb.
16~24 lb.
Manual Feeding
24~43 lb.
24~43 lb.
Paper Path
Standard output
Bottom to Upper Front (FIFO)
Bottom to Upper Front (FIFO)
Straight Through
N/A
N/A
Max
216 x 356mm(8.5"x14")
216 x 356mm(8.5"x14")
Min
76 x 127mm(3"x5")
76 x 127mm(3"x5")
Top
2.5/177.8mm
2.5/177.8mm
Side
3.5/241.3mm
3.5/241.3mm
DOS
ML-1640
No
ML-2240
No
Win 3.x
No
No
Win 95
Yes (except Status Monitor)
Yes (except Status Monitor)
Win 98
Yes
Yes
Win ME
Yes
Yes
Win NT 4.0
Yes
Yes
Win 2000
Yes
Yes
Win XP
Yes
Yes
Mac
No
Yes
Linux
No
Yes
WHQL
Printer
Yes for 2000 & XP
Yes for 2000 & XP
Driver
Printer
GDI
GDI
TWAIN
No
No
WIA
No
No
RCP
No
None
Paper Size
Printing Skew
2.1.2.4 Software
Item
Compatibility
Service Manual
2-3
Samsung Electronics
Product spec and feature
2.1.2.5 Consumables
Item
FRU
CRU
Service Manual
Pickup Roller
ML-1640
50 K
ML-2240
50 K
Pad Unit
50 K
50 K
Transfer Roller
50 K
50 K
Fuser Unit
50 K
50 K
Toner Life
Initial : 0.7K pages
Initial : 0.7K pages
Sales : 1.5K pages
Sales : 1.5K pages
( ISO / IEC 19752 Standard pattern)
( ISO / IEC 19752 Standard pattern)
2-4
Samsung Electronics
Product spec and feature
2.1.3 Model Comparison Table
ML-1640
ML-2240
Remark
CPU
Jupiter 4e
Jupiter 4e
Code
Legacy
Platform
PPM
A4 : 16ppm / Letter : 17ppm
A4 : 22ppm / Letter : 23ppm
Memory
8MB
8MB
Dev. Fuse
No. (New Drum Detection : By CRUM)
No. (New Drum Detection : By CRUM)
Resolution
300 / 600dpi
600 / 1200dpi
SPL Driver
Unified UI
Unified UI
Manual Duplex
No.
Yes.
Fan
No.
Yes.
Mech
same
same
Manual Feeder Guide : Yes
2.1.4 Accessory List
Item
ML-1640
ML-2240
INA-ACCESSORY
JC99-02162C
JC99-02161C
CBF-POWER CORD
3903-000042
3903-000042
BAG PE
6902-000809
6902-000809
S/W APPLICATION-CD
JC46-00403A
JC46-00402A
MANUAL-(CARD)WARRANTY CARD
JC68-00690A
JC68-00690A
LABEL(P)-BLANK 90*25
JC68-01584A
JC68-01584A
COVER-PAPER
Service Manual
JC63-01891A
2-5
Samsung Electronics
Product spec and feature
2.2 System Overview
2.2.1 System Outline
Paper Path Layout
Service Manual
2-6
Samsung Electronics
Product spec and feature
Unit Layout
LSU
Panel
HVPS
Motor
SMPS
Main PBA
Service Manual
2-7
Samsung Electronics
Product spec and feature
2.2.1.1 Feeding
There are the C-path type, which loads papers, and the manual feeder, which supplies paper one by one.The
cassette has the function pad which separates paper one by one, and it has the sensor function to check the
existence of the loading paper.
1) Feeding Type : MPF Type
2) Feeding Standard : Center Loading
3) Feeding Qty : Cassette 150 sheets (75g/ , 20lb paper standard)
4) Manual 1 sheet (Paper, OHP, Envelope etc.)
5) Separating Type : Cassette - Friction Pad Type
6) Driver Type : Driving by Gearing from Main Motor
7) Pick_up Roller Driver : Solenoid
8) Paper detecting Sensor : Photo Sensor
9) Paper Size Sensor : None
10) Paper Exit Type : Face Down
11) MP Tray : MP Cassette Type (Cener Loading)
2.2.1.2 Transfer Ass’y
The transfer roller delivers the toner of the OPC drum to the paper.
- The life span : Print over 50,000 sheets (in 16 ~30 )
2.2.1.3 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.(Motor drive IC : A3977)
- It is a power delivery unit by gearing : Feeder/Developer
Motor
Fuser/Exit
2.2.1.4 FUSER
The fuser is consisted of the Heat Lamp,Heat Roller,Pressure Roller,Thermister and Thermostat.
It adheres the toner on the paper with pressure and heat to complete the printing job.
- Life Cycle : 50K(pages)
Service Manual
2-8
Samsung Electronics
Product spec and feature
1) Heat Lamp
. Heat Lamp Terminal Shape : Terminal Single Type
. Voltage 120 V : 115 +/- 5 %
220 V : 230 +/- 5 %
. Capacity : 600 Watt (ML-1640), 750 Watt (ML-2240) +/- 5 %
. Life : 3000 Hr
2) Thermostat
. Thermostat Type : Non-Contact type THERMOSTAT
. Control Temperature : 150
5
3) Thermistor
. Thermistor Type : HF-K7006
. Temperature Resistance : 7 (180 )
. SYSTEM Temperature SETTING
- Stand by : 155 / 145 / 140 +/- 5 (~30page / 31 ~ 60page / 60page~ ) (NN. Plain)
- Printing : 175 / 170 +/- 5 (~30page / 30page ~) (NN. Plain)
- Overshoot : 200 or less
- Overheat : 220 or less
4) Heat roller
. Length : 247.5 mm
. Valid length : 222 mm
. GND Type : H/R Bearing Grounding type By SECC Fuser frame
5) Pressure roller
. Shaft
- Length : 237.5 mm
. Rubber
- Length : 222 mm
6) Paper separation method
Teflon sintered Claw System
7) Safety Relevant Facts
. Protecting device when overheating
- 1st protecting device : H/W cuts off when detecting an overheating
- 2st protecting device : S/W cuts off when detecting overheating
- 3st protecting device : Thermostat cuts off the power
. Safety device
- The power of Fuser is cut-off after front cover is open.
- The overheating safety device for customer
- The surface temperature of the Fuser Cover is under 80
Service Manual
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Samsung Electronics
Product spec and feature
2.2.1.5 LSU (Laser Scanner Unit)
The LSU unit is controlled by video controller. It scans the video data received from video controller with laser beam
by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. It is the core part of
LBP.
The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HSYNC signal and sends it
to the engine when the laser beam of the LSU reaches the end of the polygon mirror, and the engine detects the
/HSYNC signal to arrange the vertical line of the image on the paper. After detecting the /HSYNC signal, the image
data is sent to the LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for
scanning..
OPC Drum
Photo Diode
Polygon Mirror
Polygon Motor
Motor Driver
LD Driver circit
Protector panel
Service Manual
LD(Laser Diode)
2-10
Samsung Electronics
Product spec and feature
2.2.1.6 Toner Cartridge
By using the electronic photo process, it creates a visual image. In the toner cartridge, the OPC unit and the
developer unit are in a body. The OPC unit has OPC drum and charging roller, and the developer unit has toner,
toner cartridge, supply roller, developing roller, and blade (Doctor blade)
- Developing Method: Non magnetic 1 element contacting method
- Toner: Non magnetic 1 element shatter type toner
- The life span of toner: Initial (700 sheets) / Sales (1500 sheets) (ISO 19752 Pattern/A4 standard)
- Toner remaining amount detecting sensor: None
- OPC Cleaning: Collect the toner by using Cleaning Blade
- Management of disusable toner: Collect the toner by waste bottle
- OPC Drum protecting Shutter: None
- Classifying device for toner cartridge: ID is classified by CRUM (Toner sales)
Max -1.4KV
8 Cleaning Blade
-100V
2 Cleaning Roller
1
0.20mW
-720V
-150V¡Ø
6
7
-350V
+5KV
3
4
5
-550V
Service Manual
2-11
Samsung Electronics
Product spec and feature
2.2.2 H/W Structure and Descriptions
2.2.2.1 H/W Overview
ML-1640/2240 is roughly made up Main Control part and SMPS/HVPS part.
Main Controller uses Jupiter4E for its ASIC, which is on chip micro controller and developed for Low-end Laser
Beam Printer.
Jupter4E provides the integrated printing functions such as Printer video controller, Laser Scan Unit controller,
PWM controller and Bi-polar Stepper Motor Controller and has USB interface and built-in Flash memory with 4Mbits
capacity.
SMPS
OPE B'D
(Build-in HVPS)
LSU
HVPS
Main Controller
Jupiter IV ASIC
V1.1 USB
DRAM 8M Byte
Printer
Engine
B'D
Flash Memory
0.5M Byte
Motor
2.2.2.1(a) Main Control
ML-1640/2240 of Main Control are composed of CPU and Print and operate follows function by CPU
- Bus Control, I/o
- Handling, each Driver and PC Interface
Main Control operate its full function on the Main B'd and CPU control Controller ASIC and build-in
Memory.
2.2.2.1(b) CPU
Use 32Bit RISC Processor of Jupiter4e, and control system by operating Operation Block of the System
Program inside Flash Memory.
Service Manual
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Samsung Electronics
Product spec and feature
- Main Function Block:
Completely Integrated System for Embedded Applications,
32 Bit Risc Architecture, Efficient and Powerful ARM9 CPU
LSU Interface Module for Interfacing PVC with LSU
2 Channel General Purpose DMA Controller for High Speed I/O
Dual Memory Bus Architecture
- Operation Frequency : 150MHz
- Operation Voltage : 3.3V
- POWER ON RESET TIME : 6.6ms below
2.2.2.1(c) Flash Memory
Store System Program and can be down load System Program through PC Interface
- Capacity : 0.5M Byte
- Access Time : 70 nsec
2.2.2.1(d) DRAM
When Printing, use Band Buffer, System Working Memory Area .
- 8M capa : 8M Byte basic.
- Access Time : 60 nsec
2.2.2.1(e) ENGINE
This recording method is electrophography method using LSU, which toner is composed of 1 component
and non magnetic.
1) Recording Method : LSU(Laser Scanning Unit)
2) Printing Speed : 22ppm
(In continuing printing base A4, printing pages from 2nd to last during 1min)
3) Recording Density : 600 dpi
1200 dpi
4) Cassette Capa. : Cassette ; 150sheets(75g Base),
Manual : 1 sheet (Paper, OHP, Envelop, etc )
5) Paper Size : Cassette ,Manual; Width = 76 ~ 216mm, Length = 125mm ~ 356mm
6) Effective recording size
- A4 : 202 x 291 mm
- Letter : 208 x 273 mm
- Legal : 208 x 350 mm
- Folio : 208 x 325 mm
- Top Margin : 4.23
3 mm
- Left, Right Margin : 4.23 3 mm
7) CRU(Toner Cartridge)Life : 1,500pages Printing(A4, 5% Pattern Printing)
8) First Print Out Time : 10sec( Standby )
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Samsung Electronics
Product spec and feature
2.2.2.2 Main Board
Main Board are composed of Engine and Controller on the one-Board.
Main Board control to send Current Imagedml Video Data to LSU to print and have motor Driving and Circuit for the
current driving and also include Paper Exit Sensor, Cover Open s/w, panel s/w.
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Samsung Electronics
Product spec and feature
U6(Jupiter 4E)
- It is a main CPU and an Asic of Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 75MHz.
- It use 3.3V for operation voltage and I/O, It uses 75MHz for system bus CLK, Built in Flash Memory.
SDRAM
- Main memory. SDCLK is 75Mhz.
Regulator
- It Supplies the core voltage to CPU by converting 3.3V to 1.8V.
EEPROM(U8 : 93C66)
- It is an EEPROM with 12C method.
SMPS connector(CN7)
- It connects SMPS, supplies the power, and delivers the high voltage contol signal, etc. If a harness is not normally
connected to this connector, power cannot be supplied.
LSU connector(CN14)
- It connects a LSU.
BLDC Motor connector(CN9)
- It connects an main motor and drive a BLDC Motor.
HVPS connector(CN13)
- It connects a HVPS.
DCU connector(CN8)
- It interface a DCU-JIG
USB connector(CN10)
- It interface a the printer.
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Samsung Electronics
Product spec and feature
2.2.2.3 Asic(SPGPm) Specification
2.2.2.3(a) Introduction
Jupiter4E is One-Chip micro-Controller for Low cust Laser beam Printer.
1. One Chip Laser Beam Printer Controller
- GDI only
- AMBA AHB used for high speed bus transactions between masters and slaves
- AMBA APB used for low speed bus transactions between ARM core and peripherals
- 3 PLLs ( 2 Dithered PLL and 1 General PLL)
first for CPU(150MHz), AHB(75MHz), APB(75MHz),
second for USB(48MHz)
third for PVC(59MHz)
- 75MHz system operation
- 1.8V power operation
- 3.3V tolerant input and bi-directional I/Os
- SDRAM and IO Address / Data signals multiplexing
2. Integrated ARM940T 32-bit RISC embedded processor core
- 150MHz core frequency operation
- Harvard Architecture Cache : 4KByte Instruction cache, 4KByte Data cache
- Single memory bus architecture
3. Built in Flash Memory
- 4MBits (128Kx32bits)
- Serial programming mode using flash programmer tool
- Internally flash memory read / write operation support
- Programmable access timing control
4. 32MB Special function Register Area
5. Directly connected to 3 external IO banks (IOC)
- 32 MB size in each IO bank
- Programmable setup, access, hold timing
- Programmable recovery time for slow devices
- Allows to access peripheral devices such as GPIO control logic
6. Directly connected to 1 external ROM bank (ROMC)
- 32 MB size for one ROM bank
- One external flash memory attachable.
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Samsung Electronics
Product spec and feature
7. Directly connected to two SDRAM banks (SDRAMC)
- Extensible architecture
- Two external SDRAM attachable.
- SDRAM controller supports PC-100 and PC-133 SDRAM running at 75MHz
- Up to 32MB per bank.
- Support for SDRAM configurations including programmable column address
- Programmable refresh interval
8. Interrupt Controller (INTC)
- FIQ or IRQ mode operation selectable
- Programmable Interrupt Enable/Disable
9. USB interface
- Version 1.1
- Four 128x8 FIFOs for Data transmission.
- Interrupt based input / output interface, no DMA based interface support
- USB wrapper for AHB interface
- AHB Bus interface
10. Serial port interface (UART)
- Programmable Baud Rate
- 2 channel Independent Full Duplex UART
- Polling, Interrupt based operation support
- Max 16 byte FIFO to handle SIR Bit Rate Speed
11. Printer video controller for LBP engines (PVC)
- 80MHz video rate (Hummingbird 2 : letter - 21 ppm, A4 : 20ppm)
- video data transmitted through LSU Controller
12. Laser Scan Unit (LSU) Controller
- Laser Scan Unit (LSU) Interface for Laser Diode turn on/off timing control
- Sample & hold period generation.
- Auto Power Control for Laser Diode with PID control method using internal 10 bits DAC.
- LSU clock generation
- Brushless DC motor control clock generation
13. ADC Interface
- 4 channels ADC interface for analog devices such as temperature sensor.
- Programmable ADC Clock Cycle.
- Automatic or Manual AD Conversion support.
- 4 Special Function Registers for monitoring the ADC results for 4 channels.
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Product spec and feature
14. PWM Controller
- 4 PWM output ports - THV, BIAS, FAN control and AC ELECTRIFICATION
15. Bi-polar Stepper Motor controller (MOTORC)
- Phase generation for the purpose of paper feeding
- fixed hardware phase and current table
- programmable phase and interval time
- Interrupt based phase change operation
16. Timer
- 3 Independent Programmable Timers
- Watch Dog Timer for S/W Trap
17. Miscellaneous
- Mux controlled 24 GPI, 28 GPO & 5 GPIO ports .
- Mutual exclusive GPO/GPIO ports control by the port control enable register
- Programmable Bus Master Priority.
- Project code added.
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Samsung Electronics
Product spec and feature
2.2.2.4 Sensor Controller
2.2.2.4(a) Paper Feeding/Width
When a paper passes an actuator of a feed sensor unit after feeding a paper into a set,it detects a signal of
the photo interrupter and informs the paper feeding status to CPU. After sensing the signal and certain time
later, it strews an image data.(Related in Paper Front Edge Adjustment)
If it could not detect the feed sensor within 1 second after feeding a paper, a paper jam0 (CPU#_) occurs.
2.2.2.4(b) Paper Empty Sensing
The paper empty is detected by the empty sensor mounted to an engine board and the actuator mounted
to a frame. Paper senses the on/off time of the empty sensor by using CPU and informs the normal
operation status and the jam occurrence status to CPU.
2.2.2.4(c) Jam Cover/Cover Open Sensing
ML-1640/2240 uses two M/S:one senses the cover open and the other senses the jam cover open.
The cover open sensor is located on the left bottom of HVPS.When the front cover is open, +24V supplied
to each unit (DC fan, Solenoid, Main Motor, Polygon Motor Unit of LSU in Fusing Unit, and HVPS) is
interrupted.
The jam cover open sensor is located on the centeral top of HVPS. When the jam cover is open, +24V
supplied to each unit (DC fan, Solenoid, Main Motor, Polygon Motor Unit of LSU in Fusing Unit, and HVPS)
is interrupted.
D0 bit of CPU detects the jam cover open/cover open, and D7 bit of CPU detects the existence of OPC.
In this case, it informs the status to user by turning on the red LED among OP panel LEDs.
2.2.2.4(d) Solenoid Driving Circuit
The solenoid consists of two used for paper pick-up and MP signal. D4 bit of CPU turns it on/off, and its
driving time is 300ms. The diode protects the drive TR from the pulse (noise)generated by de-energizing
operation of solenoid.
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Samsung Electronics
Product spec and feature
2.2.2.5 SMPS board (Switching Module Power Supply)
The SMPS supplies DC Power to the System.
It takes 110V/220V and outputs the +5V, +24V to supply the power to the main board and other board. It is
consisted of the AMPS part, which supplies the DC power for driving the system, and the AC heater control part,
which supplies the power to fuser. SMPS has two output channels. Which are 5V and +24V
Micro Switch
CON1(Inlet)
F1(Fuse/250V, 5A)
Power Switch
CON2
(Output)
Exit Sensor
Pin Signal
<CON2>
Service Manual
Pin No
Pin Name
1
2
3
4
5
6
7
8
9
+24VS2
+24V
+24VS1
+24VS1
+5V
DGND
DGND
P_REGI
FUSER ON
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Samsung Electronics
Product spec and feature
1) SMPS Specification
- AC Input
Input Rated Voltage : AC 220V ~ 240V, AC 120V / AC 220V(110V version)
Input Voltage fluctuating range : AC 90V ~ 135V / AC 180V ~ 270V(220V version)
Rated Frequency : 50/60 Hz
Frequency Fluctuating range : 47 ~ 63 Hz
Input Current : Under 4.0Arms / 2.5Arms
(But, the status when lamp is off or rated voltage is inputted/outputted )
- Rated Output Power
No
Items
1
2
Channel
Connector pin
3
Rated Output
4
5
6
7
8
9
Max. Output current
Peak Loading current
RIPPLE NOISE Voltage
Maximum output
Peak output
Protecttion for loading
shorage and overflowing
current
CH1
+5V
CON 3
5V PIN : 11, 12
GND PIN : 8, 9
+5V 5%
(4.75 ~ 5.25V)
0.8A
1.0A
100mVp-p or less
4W
5W
CH2
+24.0V
CON 3
24V PIN : 2, 3, 4
GND PIN : 6, 7
+24V
5%
(20.4 ~ 27.6V)
2.0A
2.5A
500mVp-p or less
24W
48W
Remarks
1ms
1ms
- Consumption Power
No
1
2
3
Items
Stand-by
PRINTING
Sleep-Mode
CH1(+5V)
1.0 A
1.0 A
0.8 A
CH2(+24V)
0.4 A
2.0 A
0.4 A
System
AVG : 55 Wh
AVG : 250 Wh
AVG : 10 Wh
- Power Cord Length : 1830° 50mm
- Power Cord Switch : Use
- Feature
. Insulating Resistance : 100 or more (at DC 500V)
. Insulating revisiting pressure : Must be no problem within 1 min. (at 1000Vac,10mA)
. Leaking Current : under 3.5mA
. Running Current : under 40A PEAK (AT 25 , COLD START)
under 50A PEAK (In other conditions)
. Rising Time : within 2Sec
. Falling Time : over 20ms
. Surge : Ring Wave 6KV-500A (Normal, Common)
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Samsung Electronics
Product spec and feature
- Environment Condition
. Operating temperature range : 0
40
. Maintaining temperature range : -20
40
. Preserving Humidity Condition : 10% ~ 90% RH
. Operating atmospheric pressure range : 1atm
- EMI Requirement : CISPR ,FCC, CE, MIC,
- Safty Requrement : IEC950 UL1950, CSA950, C-UL,Semko, EK,CB,
CCC(CCIB),GOST, EPA, Power Save
2.2.2.6 HVPS board (High Voltage Power Supply)
The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making
best condition to display the image. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS,
and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.
1) Transfer High Voltage (THV+)
- Input Voltage : 24 V DC ° 15%
- Out Voltage : Max. +1.3KV ° 15% (Cleaning,200 )
- Out Voltage Trigger : 6.5
- Input Voltage Variation : 5 % below(Variation 21.6V°≠26.4V)
Load Variation : % below
- Out Voltage Rising Time : 100 ms Max
- Out Voltage Falling Time : 100 ms Max
- Transfer Variation Voltage on Environment Variation : +650 V(Duty 10%) ~ 5KV (Duty 90%)
- Control Method on environment : THV-PWM ACTIVE,transfer Active signal, of environment sensing
voltage is input and get feed back current, and recalculate it to resistence .
- Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal as
follows. 10% Duty : +650V, 90% Duty : +5KV
5%
2) Charge Voltage (MHV)
- Input Voltage : 24 V DC 15%
- Out Voltage : -1.3KV ~ 3.2%
- Out Voltage Rising Time : 50 ms Max
- Out Voltage Falling Time : 50 ms Max
- Out Voltage Range : 30 ~ 1000
- Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low
3) Developing Voltage (DEV)
- IInput Voltage : 24 V DC 15%
- Output Voltage: -350V 4.6%
- Output Voltage Fluctuation range: PWM Control
- Input contrast of the output stability degree : 5 % or less
- Loading contrast : 5 % or less
- Output Voltage Rising Time : 50 ms Max
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Product spec and feature
- Output Voltage Falling Time : 50 ms Max
- Output Loading range : 10Mߟ ~ 1000
- Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low.
4) Supply
- Output Voltage : -550 V 8.6%(ZENER using, DEV )
- Input contrast of the output stability degree : under 5 %
- Loading contrast : 5 % or less
- Output Voltage Rising Time : 50 ms Max
- Output Voltage Falling Time : 50 ms Max
- Output Loading range : 10 ~ 1000
- Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low.
LED2
(Toner Save LED)
CN3
LED1
(Error LED)
Switch
MHV
OPC
DEV
THV
Supply
Micro Switch
CN1
Input
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Samsung Electronics
Product spec and feature
2.2.2.7 FUSER AC POWER CONTROL
Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a semiconductor
switch. The 'ON/OFF control' is operated when the gate of the Triac is turned on/off by Phototriac (insulting part).
In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from engine
control part.
When the 'HEATER ON' signal is turned on at engine, the LED of PC1 (Photo Triac) takes the voltage and flashes.
From the flashing light, the Triac part (light receiving part) takes the voltage, and the voltage is supplied to the gate
of Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred.
On the other hand, when the signal is off, the PC1 is off, the voltage is cut off at the gate of Triac, the Triac
becomes off, and then the heat lamp is turned off.
1) Triac (THY1) feature :16A, 600V SWITCHING
2) Phototriac Coupler (PC3)
. Turn On If Current : 16mA
. High Repetive Peak Off State Voltage : Min 600V
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Samsung Electronics
Product spec and feature
2.2.3 S/W Structure and Descriptions
The purpose of this document is to describe the design specification of the Engine Control F/W for the
ML-1640/2240.
2.2.3.1 Introduction
This Engine Control Firmware is a program that controls LBP Engine of the ML-1640/2240.
This firmware is executed every 10msec as an interrupt routine of the main system. At stand-by state, this firmware
monitors the enable print command from the main system. If the enable print command is detected, this firmware
controls the Engine Mechanism according to the printing process and paper feeding state. And with the Sleep
command or Wake-Up command, this firmware controls the Engine state.
2.2.3.2 Engine Control F/W Overview
Engine Control F/W is executed every 10msec by timer interrupt of main system. And it consists of 3 control
modules.
- Engine Main Control, Interface Control and Sensing & Unit Control Module.
Major operations of the Engine Control F/W are following.
- Control the Pick-Up, Feeding and Discharging of Paper
- Control the LSU
- Control the HVPS for the Developer Process
- Control the Temperature of Fixing unit
Controlling selection to here is added.
- Second Cassette Feeder(SCF) : N/A
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Samsung Electronics
Product spec and feature
- Architecture of Engine Control F/W
Power On
Main F/W of the printer controller
Initial
Engine F/W
Device Units
Fixing Unit
Interface Control Module
LSU
HVPS
Engine Main Control Module
Fan Unit
Motors
Solenold &
Sensing & Unit Control Module
Clutch
Hardware Devices
& Mechanical Device
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Product spec and feature
2.2.3.3 F/W Architecture of Engine Control Firmware
- The Engine Control Module is executed every 10msec as interrupt job of main system. There are three
control modules, i.e., Engine Main Control Module, Engine Interface Module and Sensing & Unit Control
Module.
- Probably from usual state it will be able to rehabilitated a prior to entry error state in error condition it is to
confirm. When the if rehabilitation is possible then after rehabilitating it goes back in usual state, else with
an error condition it goes in error state. Currently the rehabilitation function of the low heat error , the over
heat error and the LSU error is embodied.
- Low Heat Error
When the error occurrs, it does not indicate an error. It stores the present temperature and supplies the
heat to the fixing unit during the scheduled time. If the temperature goes up after scheduled time, it goes
back to a normal state. However, if not, it is formed that an error occurrs.
- Over Heat Error
When the error occurs, it informs an error first. It stores the present temperature as well and waits a
scheduled time. If the temperature goes down after scheduled time, then it goes back to a normal state.
However, if not, it is formed that an error occurrs.
- Lsu Error
When the error occurrs, it does not indicate an error. It accomplishes printing only again. If even time
when it judges an error, it informs an error. Concretely speaking, if the LReady or Hsync error happens,
the paper exits out beforehand. And then the engine mode is changed to recovery mode and the engine
informs the main system of the engine mode. And the engine checks the LSU error in itself. If the error
doesn’t happen, the printing job will be proceeding.
2.2.3.4 Engine Interface Module Design
Engine Interface Module communicates with the main system in order to receive the command from main system
and to transmit the present engine status for the requested status. There are two sub functions. One is a function to
receive the command from the main system. The other is a function that informs the main system of the current
engine status for the requested item.
2.2.3.5 Engine Sensing & Unit Control Module Design
Engine Sensing & Unit Control Module consists of 4 sub-functions. The first function is an ADC function that reads
the ADC values of the temperature of the fixing unit. The second one is a fixing unit control function. This function
regulates the temperature of the fixing unit within a fixed range to be set by the paper type and the number of pages
to print out. The third one is a fan control function that controls the fan unit. And the last one sets the flag that
describes the present status of each sensor.
Service Manual
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Samsung Electronics
Product spec and feature
- F/W Architecture
START
Global Timer Increment
Get A DC Value
(Tempe rature, .. )
Control the fixing unit
&
Check error condition for the fixing unit
Control the fan unit
Get status value of each sensor
&
Set present status flag of each sensor
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Samsung Electronics
Product spec and feature
2.2.4 Initial Product Installation
2.2.4.1 Accessory List
Remove the printer and all accessories from the packing carton. Make sure that the printer has been packed with
the following items:
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Samsung Electronics
Product spec and feature
2.2.4.2 Replacing Toner
When the status LED lights red, it means the machine cartidge is totally exhausted. Your machine stops printing.
Also, the Smart Panel program window appears on the computer telling you to replace the cartridge.
At this stage, the toner cartridge needs to be replaced. Check the type of toner cartridge for your machine.
1. Turn the machine off, then wait a few minutes for
the machine to cool.
4. Holding both handles on the toner cartridge,
thoroughly rock it from side to side to evenly
distribute the toner.
2. Grasp the front cover and pull it toward you to
open.
5. Locate the cartridge slots inside the machine, one
on each side.
3. Remove the toner cartridge from its bag and
remove the cap protecting the cartridge by pulling
the packing tape.
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Samsung Electronics
Product spec and feature
6. Unfold the toner cartridge handle and grasp it.
Insert the cartridge in the machine until it snaps into
place.
Service Manual
7. Close the front cover. Make sure that the cover is
securely closed. If the cover is not firmly closed,
printing errors may occur when you print.
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Samsung Electronics
Product spec and feature
2.2.4.3 Loading Paper
Load the print media you use for the majority of your print jobs in the tray.
The tray can hold a maximum of 150 sheets of 75 g/ (20 lb bond) plain paper.
1. Grasp the paper input tray and pull it toward you to
open. Pinch the rear guide and pull it out to extend
the tray.
4. Pinch the rear guide to adjust for the paper length
and pinch the side guide and slide it to the left flush
against the paper.
5. If necessary, close the paper cover to keep the
paper loaded in the tray from dust.
2. Prepare a stack of paper for loading by flexing or
fanning them back and forth. Straighten the edges
on a level surface.
3. Load paper with the print side facing up. Make sure
that all four corners are flat in the tray.
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Samsung Electronics
Product spec and feature
2.2.4.7 Installing Printer Software
The supplied CD-ROM contains Windows printing software, Linux printing software, on-line User’s Guide and
Acrobat Reader to view the User’s Guide.
1. If you are printing from Windows
- You can install the following printer software using the CD-ROM.
• Printer driver for Windows. Use this driver to take full
- advantage of your printer’s features. For details, see Software User Guide.
• Status Monitor allows you to see the printing status of the printer. For details, see Software User Guide.
2. If you are printing in Linux
- Go to Software User Guide for information about installing the Linux driver.
3. System Requirements
Your machine supports following operating system.
• Windows 98/Me/2000/XP - The following table shows Windows requirements.
Item
Requirements
Operating System
Window 98/Me/2000/XP/Vista
CPU
Window 98/Me/2000/XP
Pentium II 400 or higher
Window XP
Pentium II 933 Ghz or higher
Window 98/Me/2000
64 MB or higher
Window XP
128 MB or higher
Window 98/Me/2000
300 MB or higher
Window XP
1 GB or higher
RAM
Free Disk Space
Internet Explorer
Service Manual
5.0 of higher
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Samsung Electronics
Disassembly and Reassembly
3. Disassembly and Reassembly
3.1 General Precautions on Disassembly
When you disassemble and reassemble components, you must use extreme caution. The close proximity of cables to moving parts makes proper routing a must.
If components are removed, any cables disturbed by the procedure must be restored as close as possible to their original
positions. Before removing any component from the machine, note the cable routing that will be affected.
Whenever servicing the machine, you
must perform as follows:
Releasing Plastic Latches
Many of the parts are held in place with plastic latches.
The latches break easily; release them carefully.
To remove such parts, press the hook end of the latch
away from the part to which it is latched.
1. Check to verify that documents are not stored in memory.
2. Be sure to remove the toner cartridge before you disassemble parts.
3. Unplug the power cord.
4. Use a flat and clean surface.
5. Replace only with authorized components.
6. Do not force plastic-material components.
7. Make sure all components are in their proper position.
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Samsung Electronics
Disassembly and Reassembly
3.2 Disassembly and Reassembly
3.2.1 Front Cover
1. Open the front cover. Separate the front cover from
the lock the frame by pulling the left bottom.
force
3. If necessary, remove the extension tray by pulling to
the direction of arrow.
Hook
2. If necessary, remove the cassette cover as the same
way.
Service Manual
4. Take out the MP tray after remove the toner cartridge.
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Samsung Electronics
Disassembly and Reassembly
3.2.2 Main Cover
1. Remove the SMPS cover after remove the 2 screws.
And remove the 2 screws from the rear bottom of
SET.
2. Release the SMPS cover after unplug the 1 connector
from Main PBA.
3. Lift the Main Cover after remove the 2 screw.
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Samsung Electronics
Disassembly and Reassembly
3.2.3 Fuser unit
1. Unplug the 2 connector from Main PBA and SMPS board.
2. Release the Fuser unit after remove the 4 screws.
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Samsung Electronics
Disassembly and Reassembly
3.2.4 SMPS board
• Before Disassembling, Separate the SMPS cover.
(Refer to 3.3 )
• Remove the SMPS board after remove the 7 screws
and 2 harness.
3.2.5 Main PBA
• Before Disassembling, Separate the SMPS cover.
(Refer to 3.3 )
• Remove the Main PBA after remove the 3 screws and
all harness.
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Samsung Electronics
Disassembly and Reassembly
3.2.6 Drive unit
1. To remove the Drive assy, first remove the Main cover
(refer to 3.3 ). And remove the 2 screws as shown
below.
3. Unplug the one harness.
2. Remove the 6 screws and then release the Drive unit.
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Samsung Electronics
Disassembly and Reassembly
3.2.7 LSU
• Before disassembling, Separate the Main cover. (Refer to 3.3)
• Release the LSU after remove the 3 screws and 2 harness.
3.2.8 HVPS board
1. Remove the 5 screws.
Service Manual
2. Remove the 2 connector as shown below.
3-7
Samsung Electronics
Disassembly and Reassembly
3.2.9 Transfer roller
• Before disassembling, Separate the Main cover (refer to 3..3 ) and Fuser unit (refer to .3.4 )
• Remove the transfer roller by lift up the edge with any tool.
3.2.10 Pick up roller
1. Remove the hook of both side. And pull the pick-up
roller to the direction of arrow.
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Samsung Electronics
Alignment & Troubleshooting
4. Adjustment and Troubleshooting
4.1 Alignment and Adjustments
4.1.1 Sample Pattern
This product has the several sample patterns for maintenance. With the sample patterns, check the
existence of the abnormality. The patterns help to regularly maintain the product.
4.1.1.1 Printing a Demo Page
Print a demo page or a configuration sheet to make sure that the printer is operating correctly.
1) Hold down the Cancel button for about 2 seconds to print a demo page.
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Samsung Electronics
Alignment & Troubleshooting
2) The Demo page or the configuration sheet shows the printer’s current configuration.
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Samsung Electronics
Alignment & Troubleshooting
4.1.2 Control Panel
4.1.2.1 OP Panel
Status LED
Shows the status of your machine.
Toner LED
Shows the status of the toner cartridge.
Cancel
Stops an operation at any time and there are more functions.
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Samsung Electronics
Alignment & Troubleshooting
4.1.2.2 Understanding The Control Panel
The color of the status and toner LED indicates the machine's current status.
On-Line/Error LED
STATUS
Green
Red
DESCRIPTION
On
The machine is warming up or ready to receive the data.
Blinking
The machine is printing data.
On
• The machine is experiencing an error, such as open cover, paper
empty, installer error, or invalid error.
• The machine is experiencing a service required error, such as LSU
error, or fuser error.
Orange
On
The machine is experiencing an error such as jammed paper.
Toner LED
STATUS
Red
Service Manual
DESCRIPTION
On
The toner is exhausted, machine will stop printing. Replace the toner
cartridge.
Blinking
The toner is low, replace the toner soon.
Rapidly blinking
The toner is empty, replace the toner.
4-4
Samsung Electronics
Alignment & Troubleshooting
LED on error status
LED
LED Display
Smart
Panel
Paper Empty
On-Line/Error LED
Red LED On
O
Paper Jam0
On-Line/Error LED
Orange LED On
O
Paper Jam1
On-Line/Error LED
Orange LED On
O
Paper Jam2
On-Line/Error LED
Orange LED On
O
CoverOpen
On-Line/Error LED
Red LED On
O
MotorError
On-Line/Error LED
Red LED On
O
LSU Hsync Error
On-Line/Error LED
Red LED On
O
LSU Motor Error
On-Line/Error LED
Red LED On
O
Thermistor OpenError
On-Line/Error LED
Red LED On
O
Fuser High Error
On-Line/Error LED
Red LED On
O
Fuser Low Error
On-Line/Error LED
Red LED On
O
Toner Low
Toner LED
Red LED Blinking : 2.5sec On / Off
O
Replace Toner
(Toner Empty)
Toner LED
Red LED Blinking : 1.0sec On / Off
O
Replace Toner
(Toner Exhausted)
Toner LED
Red LED On
O
H/Stop
Installer Error
On-Line/Error LED
RED LED On
O
H/Stop
Invalid Error
On-Line/Error LED
Red On
O
H/Stop
Genuine Error
On-Line/Error LED
Red On
O
Machine Status
Cancel button
STATUS
DESCRIPTION
Printing demo page
In ready mode, press and hold this button until the status LED blinks,
and release.
Canceling print job
Press this button during printing. The red LED blinks while the print job
is cleared from both the machine and the computer, and then the
machine returns to ready mode. This may take some time depending
on the size of the print job.
Manual print
Press this button during printing. The On Line/Error LED blinks while
the print job is cleared from both the machine and the computer, and
then return to ready mode. This may take some time depending on the
size of the print job. In Manual Feed mode, you can't cancel the print job
by pressing this button.
Service Manual
4-5
Samsung Electronics
Alignment & Troubleshooting
4.1.3 Consumables and Replacement Parts
The cycle period outlined below is a general guideline for maintenance.
A printer can’t transmit or receive documents this line is for fax machines.
Environmental conditions and actual use will vary these factors.
The cycle period given below is for reference only.
Service Manual
COMPONENT
REPLACEMENT CYCLE
Pick-up Roller
50,000 Pages
Transfer Roller
50,000 Pages
Fuser
50,000 Pages
Toner Cartridge
1,500 Pages(Sales), 700 Pages(Initial)
4-6
Samsung Electronics
Alignment & Troubleshooting
4.1.4 Periodic Defective Image
If the delinquent image regularly occurs in the printed-paper, it is due to delinquent or damaged roller.
Refer to the table in below and check the condition of the roller.
No
Roller
Defective image
Typical defect
1
OPC Drum
75.5mm
white spot on black image or black spot
2
Charge Roller
37.7mm
black spot
3
Supply Roller
47.5mm
light or dark horizontal image band
4
Developing Roller
35.2mm
horizontal image band
5
Transfer Roller
46.2mm
image ghost
6
Heat Roller
63.9mm
Black spot and image ghost
7
Pressure Roller
75.4mm
black spot on the backside
BIN PATH
1
2
3
4
Service Manual
5
6
7
OPC Drum
Charge Roller
Supply Roller
Transfer Roller
Heat Roller
Pressure Roller
Developing Roller
4-7
Samsung Electronics
Alignment & Troubleshooting
4.1.5 How to use DCU
4.1.5.1 DCU Setup
You can examine the malfunction of the printer. To perform DCU, open the front discharge cover and leave the
connect the harness wire(10 pin/4 pin) to the CN1(ML-1640/2240) of the Main control board.
ML SERIES DIAGNOSTIC CONTROL UNIT
04 DEV 300
DEV 350
DEV 350
05 LSU READY
LSU MT & LD
LSU MOTOR
07 PAPER EMPTY
PAPER WIDTH
NEW CRU
08
EXIT SENSOR
FEED SENSOR
SELF
TEST
09 COVER OPEN
STATUS
10 COER HEATING PRINTING TEMP READY HEAT
DIAGNOSTIC
OFF
ON
DIAGNOSTIC CODE
00
01
02
03
04
05
06
07
08
09
10
11
MAIN MOTOR OPERATING SYSTEM
MAIN HIGH-VOLTAGE ON
TRNSFER HIGH-VOLTAGE (-)ON
THV(+) REFERANCE VOLTAGE
DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON
LSU OPERATING SYSTEM
PICKUP CLUTCH ON
PEEMPTY/PWITH/NEW CRU TEST
FEED & EXIT SENSOR TEST
COVER OPEN SENSOR TEST
FUSER TEST
HOT BURN TEST
12
CLEAN MODE PRINT
13
THV(+)TRIGGER, ALL HV & FAN ON
14
THV(+) REFERENCE ON
STATUS CODE
61
WARM UP
00
01
02
03
04
READY
READY
READY
READY
READY
20
30
40
50
PRINT START
FEED SENSOR ON
FEED SENSOR OFF
PAPER OUT
69
SLEEP MODE
(REGAL)
(LETTER)
(A4)
(EXECUTIVE)
(B5)
ERROR STATUS CODE
60
62
68
64
70
71
72
73
95
DIAGNOSTIC
MODE
DOWN
UP
OPEN FUSER ERROR
LOW TEMPERATURE ERROR
OVER HEATING ERROR
COVER OPEN ERROR
NO PAPERR
PAPER JAM 0
PAPER JAM 1
PAPER JAM 2
LSU NOT READY
SHIFT
STOP
ENTER
TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL
AND TURN THE PRINTER POWER ON.
Service Manual
4-8
Samsung Electronics
Alignment & Troubleshooting
4.1.5.2 Code
Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code tells the
function of the printer.
1) Normal Code
While printing or warming up, it indicate the position of the paper
Code
State
61
00~05
Warm up
Ready(kind of paper)
20, 21, 22
Print Start
30
40
50
69
Feed Sensor On
Feed Sensor off
Paper Out
Sleep Mode
Description
The printer is on, the cover is open or close.
The printer is ready, the paper is detected when the first paper is printed.
00: Legal ,01: Letter ,02: A4 ,03: EXEC ,04: B5 ,05: Folio, 06: A5/A6
The engine controller received the print order from the video controller.
20: 1st, 21: MP, 22: SCF
The paper is passing out of the Feed Sensor.
The paper has passed out of the Feed Sensor.
The paper has passed out of Exit Sensor.
The fuser power turned off to minimize the power consumption.
2) Error Code
When detecting the malfunction, the printing is stopped to indicate error code.
Code
State
60, 62, 68
Fuser Error
64
65
70
71
72
Cover Open
CRU Error
No Paper
Paper Jam 0
Paper Jam 1
73
Paper Jam 2
76
95
Out Bin Full
LSU Not Ready
Service Manual
Description
The error in the fuser occurred. There is a short circuit in the thermistor
and the thermostat while printing, Low Temperature Error occurs.
• 60: Open Fuser Error
• 62: Low Heat Error
• 68: Over Heat Error
The Printer Cover is open.
The Toner Cartridge not installed,
No paper in the paper cassette.
The front part of paper is jammed between pickup unit and Feed sensor.
The front part of paper is jammed between the Discharge sensor and Feed
sensor.
The front part of paper is jammed just after passing through the discharge
sensor.
The Out bin is filled with paper.
LSU Scanner Motor not ready or Hsync signal not output.
4-9
Samsung Electronics
Alignment & Troubleshooting
4.1.5.3 Self Diagnostic Mode
If Error code occurs due to malfunction of the printer, perform Self Diagnostic Mode to solve the problem.
The printer works only in the self-test mode to solve the malfunction problem.
To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same time.
Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button [Up] or
[Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of [shift] and
[Enter] together.
Code
Description
00
Main Motor Operating System
Only the main motor is in operation.
01
Main High Voltage On(THV-)
-1400 voltage output by MHV terminal.
Caution : High voltage probe should be used.
02
Transfer High Voltage(-)On(THV-)
-1000 voltage output by MHV terminal.
Caution : High voltage probe should be used.
03
Transfer High Voltage (+)Reference on (THV +)
+1300 voltage output by MHV terminal.
Caution : High voltage probe should be used.
04
DEV/supply High Voltage : DEV/Supply High Voltage Test.
The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply
high voltage output by each HV terminal. Press the [Up] button to switch the voltage. The
middle and right one of the three LEDs are on and -350 voltage output by DEV HV
terminal.
Caution : High voltage probe should be used.
05
LSU Operating System
The scanning motor of LSU is in operation, the right LED of the three buttons on. Press
the [Up] button to Check LD. LD is functioning and the middle button is on. If the LD is
normal, all LEDs are on.
06
Pickup clutch on
The Solenoid in the printer is in operation. To stop the operation, Press the button [shift]
and [Enter] together.
Service Manual
4-10
Samsung Electronics
Alignment & Troubleshooting
Code
Description
07
Paper Empty Sensor Test :
If activate the Actuator of the PEMPTY Sensor, the left and right of the three LEDs are
on.
Paper Empty Sensor ON/OFF
1st LED ON/OFF
08
Feed & Exit Sensor Test
Test the Feed sensor and Discharge sensor in the same way as '07'.
Feed Sensor ON/OFF
2nd LED ON/OFF
Exit Sensor ON/OFF
3rd LED ON/OFF
09
Cover Open Sensor Test
Test the Cover Open Sensor in th same way as code '07’
Cover Open Sensor ON/OFF1st LED ON/OFF
10
Fuser Test
If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to
READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the
fuser is up to Printing Mode.
If you press the button once more, the left LED is on and temperature of the fuser is up to
overheat Mode.
11
Hot Burn Test
If the [enter] button pressed, the printer is continuously printing without detection.
Turn the power off to stop operation.
12
Cleaning Mode Print Mode
Print the paper to clean the OPC Drum in the Cartridge.
13
THV(+) TRIGGER. ALL HV :
All high voltage output by each HV terminal and LSU and the fan is in operation. In this
mode, electronic resistance of transfer roller and high voltage is detected.
14
PTL Test : (ML-1610 : not design)
Indicates the function of the PTL, same method of the code ‘07’.
15
Fan Test :
Indicates the function of the Fan, same method of the code ‘07’.
16
Manual Pickup Test :
Indicates the function of th Manual Pickup, same method of the code ‘07’.
17
Manual Sensor Test :
Indicates the function of the Manual Sensor, same method of the code ‘07’.
Service Manual
4-11
Samsung Electronics
Alignment & Troubleshooting
No.
Function
Enter
Up/Down
00
M otor
M otor R un
M otor S top
01
M HV
M hv O n
M hv O ff
-1300V
02
TH V(-)
Thv N egative O n
Thv N egative O ff
-1000V
03
TH V(+)
Thv O n
Thv O ff
+1300V
04
D EV
D ev O n
Dev O ff
-350V
LSU Stop
020mV
Supply
On
06
PickU p
07
P Em pty
0 : -350V
LSU R un
LS U
Remar k
DEV
0 : -550V
05
Stop
O ff
R eady
P ickup O n
Pickup O ff
Paper Em pty
08
Sensor
Exit
09
Feed
C over
C over O pen
10
Fuser
Fuser O n
11
H otB urn
HotB urn O n
12
C lean P rint
Clean Printing
13
Thv
low
R eference
14
15
16
Fuser O ff
adequate
high
PTL
PTL O n
P TL O ff
PTL
FA N
Fan O n
Fan O ff
M anual Pickup O n
M anual Pickup O ff
ł ‰
M anual
PickU p
M anual
17
Sensor
M anual Sensor
4.1.5.4 Self Test Button
If the Self-Test button pressed, vertical lines are printed.
Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After warmingup the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection, the printer begins
printing(trial printing and data from the PC). It is convenient to use this mode when the engine malfunction is
detected in the control board.
Service Manual
4-12
Samsung Electronics
Alignment & Troubleshooting
4.1.6 Paper Path
1) After taking order, the printer feeds the printing paper from the cassette or manual feeder.
2) The fad paper passes the paper feeding sensor. (Jam 0 occurs if the sensor is not operated after certain time
passes)
3) The paper passed the paper feeding sensor moves to the paper exit sensor via printing process. (Jam 1 occurs
if the sensor is not operated after certain time passes)
4) The paper passed the paper exit sensor moves out from the set. (Jam 2 occurs sometime after if the tailing edge
of the paper is not coming out from the set after the leading edge of paper passes the paper exit sensor.)
BIN PATH
Service Manual
BIN PATH
4-13
BIN PATH
Samsung Electronics
Alignment & Troubleshooting
4.1.6.1 Clearing Paper Jams
Occasionally, paper can be jammed during a print job. Some of causes include:
• The tray is overfilled.
• The front cover has been opened during a print job.
• Paper that does not meet paper specifications has been used.
• Paper that is outside of the supported size range has been
If a paper jam occurs, the On Line/Error LED on the control panel lights orange. Find and remove the jammed paper.
If it is invisible, look inside the printer.
4.1.6.2 In the Paper Exit Area
1. If the paper jams as it exits to the output tray and a
long portion of the paper is visible, pull the paper
straight out.
2. Open the top cover and the inner cover.
When you pull the jammed paper, if there is
resistance and the paper does not move
immediately, stop pulling. Continue with the next
step.
Service Manual
4-14
Samsung Electronics
Alignment & Troubleshooting
3. Loosen the paper if it is caught in the heat rollers.
Then pull the paper gently out.
4. Close the inner cover and the top cover. Printing
resumes automatically.
4.1.6.3 In the Paper Feed Area
1. Remove any misfeed paper by pulling it out by the
visible edge from the tray. Make sure that all of the
paper is properly aligned in the tray.
Service Manual
2. Open and close the front or top cover to resume
printing the document from failed pages.
4-15
Samsung Electronics
Alignment & Troubleshooting
4.1.6.4 Around the Toner Cartridge
1. Open the front cover.
3. Gently pull the paper toward you.
2. Pull the toner cartridge out and remove it from the
machine.
4. Check that there is no other paper in the printer.
5. Reinstall the toner cartridge, and then close the
cover. Printing can be resumed.
Service Manual
4-16
Samsung Electronics
Alignment & Troubleshooting
4.1.6.5 Tips for Avoiding Paper Jams
By selecting the correct paper types, most paper jams can be avoided.
• Ensure that the adjustable guides are positioned correctly.
• Do not overload the tray.
• Do not remove the paper from the tray while printing.
• Flex, fan and straighten the paper before loading.
• Do not use creased, damp or highly curled paper.
• Do not mix paper types in the input tray.
• Use only recommended print media.
• Ensure that the recommended print side is facing up when loading paper into the input tray.
4.1.6.6 Solving Print Quality Problems
Print Quality Checklist
Print quality problems can be resolved by following the checklist below.
• Redistribute toner in the toner cartridge
• Clean the inside of the printer
• Adjust the print resolution from the printer properties
• Ensure that the Toner Save mode is off
• Clear general printing problems
• Install a new toner cartridge, and check the print quality
Service Manual
4-17
Samsung Electronics
Alignment & Troubleshooting
4.2 Troubleshooting
4.2.1 Checking Symptoms
Before attempting to repair the printer first obtain a detailed description of the problem from the customer.
Power On
On-Line LED
ON?
- No Power
- Power Module error
- Main PBA
On-Line LED
Green OK?
Indicate
"Lamp toggle"
Refer to
"Chapter 4.1.4"
Print(test pattern)
printing
Quality is
Nomal?
Refer to "Solution
of Image Problem"
END
Service Manual
4-18
Samsung Electronics
Alignment & Troubleshooting
4.2.1.1 Basic Check List
1. Check the Power.
• Does "Warming Up" appear on the display?
--> If not check power cable, switch or SMPS.
--> Does the wall socket work?
• Do the Motors or other components initialize (listen for main motor, fan and LSU sounds)?
--> If not or there are none of the normal startup sounds check cable, switch or SMPS.
--> Does the wall socket work?
2. Check the LED of Panel.
• Is there On-Line LED ON?
--> If not check power cable, switch SMPS or Main board.
--> Does the wall socket work?
• Is the abnormal Lamp?
--> Check the main PBA and cable harness.
3. Check the Paper Path
• Is there a Paper Jam?
--> Remove any paper fragments caught in the paper path.
• Paper Jam occurs repeatedly at a specific point in the Paper Path
--> Open the fuser cover, Jam clear.
--> Dismantle the machine and carefully inspect the region where the jam occurs.
(Especially, check if paper fragments are caught in the Fuser
4. Print the Information Page (Configuration).
• Try printing a test page from a computer.
--> If there is an error check cables and driver installation.
5. Check the Print Quality.
•Is there are a Print Quality Problem?
--> Refer to section 4.2.5 (Page 6-17).
6. Check consumables (toner etc.).
•Using the keys print the Test Pattern.
--> Expected life of various consumable parts, compare this with the figures printed and replace as required
Service Manual
4-19
Samsung Electronics
Alignment & Troubleshooting
4.2.1.2 Initial Inspection
1. Check Power part
1. The printer does not work no matter how long you wait.
A. Is the Power Switch (printer and wall socket) turned on ?
B. Is the Power Cord connected to the printer correctly ?
C. Is the Power cord connected to the wall socket correctly ?
D. Is wall socket working ?
E. Is the unit rated at the same voltage as the supply ?
2. Does the Fan work when power is turned on?
A. Check the connectors on the SMPS.
B. Check the fuses in the SMPS.(F1)
2. Check the Installation Environment.
1. Ensure the installation surface is flat, level and free from vibration.
If necessary move the printer.
2. Ensure that the temperature and humidity of the surroundings are within specification
If necessary move the printer.
3. Ensure that the printer is position away from any air conditioning or other heating or cooling equipment. Also ensure
that is not positioned in a direct draft from any air conditioning, fan or open window.
If necessary move the printer.
4. Ensure the printer is not positioned in direct sunlight.
If it is unavoidable use a curtain to shade the printer.
5. Ensure the printer is installed in a clean dust free environment.
Move the printer to clean area if necessary.
6. Some industrial or cleaning processes give of fumes which can affect the printer.
Move the printer away from this type of air pollution
3. Check paper type.
1. Use only paper which is of a suitable quality, weight and size?
See the user guide.
4. Check the overall condition of the printer
1. Is the printer properly maintained ?
Clean the Paper Transport Passages.
Any rollers with dirt surfaces should be cleaned or replaced.
Service Manual
4-20
Samsung Electronics
Alignment & Troubleshooting
4.2.2 Bad discharge
1) Wrong Print Position
• Description
Printing begins at wrong position on the paper.
Wrong sense time caused by
defective feed sensor actuator.
Service Manual
Replace the defective actuator
4-21
Samsung Electronics
Alignment & Troubleshooting
2) JAM 0
• Description
1. Paper is not exited from the cassette.
2. Jam-0 occurs if the paper feeds into the printer.
1. Check the Solenoid by using
DCU diagnostic mode 06.
Replace the solenoid.
2. Check if the pad is loose due
to bad sealing of the side-pad.
Replace the side-pad Assembly L
or R, if necessary.
Clean with soft cloth dampened
with IPA(Isopropyl Alcohol) or
water.
3. Check the surface of the
roller-pickup for foreign matter.
4. If the paper
feeds into the printer rand
Jam 0 occurs, perform DCU to check
feed-sensor of the
engine board.
Replace the SMPS, HVPS or
Sensor.
BIN PATH
Service Manual
4-22
Samsung Electronics
Alignment & Troubleshooting
3) JAM 1
• Description
1. Recording paper is jammed in front of or inside the fuser.
2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the
Actuator-Feed.
1. If the recording paper is
jammed in front of or inside the fuser.
(Perform DCU diagnostic
code 08)
Replace the SMPS.
2. If the recording
paper is stuck in the discharge
roller and the fuser just after passing
through the Actuator-Feed, Feed
Actuator may be
defective.
Reassemble the Actuator-Feed
and Spring-Actuator if the returning
is bad.
BIN PATH
Service Manual
4-23
Samsung Electronics
Alignment & Troubleshooting
4) JAM 2
• Description
1. Recording paper is jammed in front of or inside the fuser.
2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the
Actuator-Feed.
2. If the paper is
rolled in the Fuser Roller:
• This occurs when a Guide claw is
broken away or transformed.
• It occurs when the Spring of a Guide claw
is broken away or transformed.
• It occurs when the Heat-Roller or
Pressure-Roller is seriously
contaminated
with the toner.
3. Paper is accordion in the fuser.
If the paper is stuck in the fuser :
disassemble the fuser and remove
the jammed paper, and clean the
surface of the pressure roller with
dry gauze.
Remove the jammed paper after
disassembling the fuser : Clean the
surface of the pressure roller with
dry gauze.
• Remove the toner particles
stained on the rib.
• Check the assemblage and
performance of the exit.
BIN PATH
Service Manual
4-24
Samsung Electronics
Alignment & Troubleshooting
5) Multi-Feeding
• Description
Multiple sheets of paper are fed at once.
1. Solenoid malfunction
(the solenoid does not work properly):
Perform DCU Diagnostic
Code 06.
Replace the solenoid if necessary.
Clean the pad friction with soft
clothe dampened with IPA
(Isopropyl Alcohol).
2. Pad-Friction is
contaminated with foreign
matter.(oil...)
Use the smooth paper.
3. The face of paper is blended.
Service Manual
4-25
Samsung Electronics
Alignment & Troubleshooting
6) Paper rolled in the Fuser
• Description
If contaminated at intervals of 57mm on the back of a paper.
After disassembling the fuser, clean
contamination between the heat
roller and the thermostor and
remove the contamination of the
pressure roller.
1. Contamination of the
pressure roller or heat roller
(Background, Hot off set).
1. If there is heavy background,
repair it by the background
troubleshooting method.
2. The surface of the heat roller
with IPA or water
3. Check the warp or separation of
the sprint claw and the holder
plate claw, and then manage it.
2. Check the claw of the fuser
whether it is unfitted.
Service Manual
4-26
Samsung Electronics
Alignment & Troubleshooting
7) Paper rolled in the Toner Cartridge (OPC Drum)
• Description
Service Manual
Paper is rolled up in the OPC.
1. Paper is too much thin.
Recommend to use normal paper.
2. The face of paper is curled.
How to remove the rolled in the
OPC Drum.
• Remove the paper while turning
the OPC Drum against the
ongoing direction.
4-27
Samsung Electronics
Alignment & Troubleshooting
4.2.3 Malfunction
1) Red LED on (On line/Error LED) (Fuser Error)
• Description
1. Red LED on (On line/Error LED)
2. Gear of the fuser does not work and breaks away melt away.
When printing, motor breaks away from its place due to defective fuser gear.
1. Check if the thermostat,
AC wire and Heat Lamp is open.
If the thermostat is open replace
the fuser and check following items.
2. Check if the thermistor
sensor is in place.
If the thermistor sensor device is
located deep in the sponge,
replace the fuser.
3. Check if the heat lamp
works properly.
Check if the circuit of overheat
mode works properly.
4. Check if the overheat
circuit works properly.
Run DCU mode : Perform DCU
diagnostic code 10.
5. The fuser gear is defective
due to melting away.
Service Manual
Replace Fuser.
4-28
Samsung Electronics
Alignment & Troubleshooting
2) Not function of the gear of the fuser due to melting away
• Description
The motor breaks away from its place due to gear melting away.
DCU Mode :
Check if the Error States
'60' '62' '68' occur. Check the operation
of Fuser Erasing Lamp On/Off with
the Error Code
Check -10-.
Service Manual
1. Replace the Fuser.
2. Replace the Main Control board.
4-29
Samsung Electronics
Alignment & Troubleshooting
3) Paper Empty
• Description
The paper lamp on the operator panel is on even when paper is loaded in the cassette.
1. Bending or deformation of
the actuator of the paper sensor.
Replace the defective actuator.
2. The function of the engine
board is defective Perform DCU mode :
Perform DCU diagnostic
code 8.
Service Manual
4-30
Replace the engine board.
Samsung Electronics
Alignment & Troubleshooting
4) Paper Empty without indication
• Description
The paper lamp on the operator panel does not come on when the paper cassette is empty.
1. Bending or deformation of
the actuator of the paper sensor.
Replace the defective actuator.
2. The function of the engine
board is defective Perform. DCU mode :
Perform DCU diagnostic
code 8.
Service Manual
4-31
Replace the engine board.
Samsung Electronics
Alignment & Troubleshooting
5) Cover Open
• Description
The ERROR lamp is on even when the print cover is closed.
1. The Hook Lever in the top
cover may be defective.
Replace the hook lever, if defective.
2. Check the connector
(Engine B’d´HVPS) and circuit of
the cover switch department in the Main
Control board. Perform DCU mode :
If Error state '64' occurs, Check
the related codes of the
Cover Open
Error.
Service Manual
4-32
1. Check the insertion of the Cover
Open S/W Connect.
2. Replace the Main Control board
or Cover Open S/W.
Samsung Electronics
Alignment & Troubleshooting
6) No lamp on when the cover is open
• Description
The ERROR lamp does not come on even when the printer cover is open
1. Check the connector
and circuit of the cover switch
department in the Main Control board.
Perform DCU mode : If Error state
'64' occurs, Check the related
codes of the Cover
Open Error
Service Manual
1. Check the insertion of the Cover
Open S/W Connect.
2. Replace the Main Control board
or Cover Open S/W.
4-33
Samsung Electronics
Alignment & Troubleshooting
7) Defective motor operation
• Description
Main motor is not driving when printing, and paper does not feed into the printer, resulting 'Jam 0'.
Check the motor harness, replace
it, if defective.
1. Motor harness or sub
PCB may be defective.
2. Perform DCU diagnostic
code 00 and Check the motor
operation.
Service Manual
Replace the SMPS, if necessary.
4-34
Samsung Electronics
Alignment & Troubleshooting
8) No Power
• Description
When system power is turned on, all lamps on the operator panel do not come on.
Replace the power supply cord or
SMPS.
1. Check if the power input and
SMPS output are normal.
2. Check the inferiority of
LED-Panel on the front-cover if the
LED of Panel does not appear after
normal warming-up.
Service Manual
1. Replace the control board.
2. Replace the LED-panel.
4-35
Samsung Electronics
Alignment & Troubleshooting
9) Vertical Line Getting Curved
• Description
When printing, vertical line gets curved.
1. If the supply of +24v
is unstable in the Main Control board
linking with LSU, check drive by
DCU Mode : LSU Check -05LSU Motor on.
Service Manual
1. Replace LSU.
2. Replace the Main Control board.
4-36
Samsung Electronics
Alignment & Troubleshooting
4.2.4 Bad Software Environment
1) The printer is not working (1)
• Description
While Power turned on, the printer is not working in the printing mode.
Check the power of the printer and perform the
Self-Test. If the test printing works, that means no
problems in the printer itself. If the test printing
does not work, that means bad functioning of the
printer(not because of software).
1. Run Self-Test Mode :
Turn the power on and pressing
“System Data List” by pressing MenuReports-System Data.
2. Check if the PC
and the printer is properly
connected and the toner cartridge
installed.
Replace the printer cable. If the problems not
solved even after the cable replaced, check the
amount of the remaining toner.
Check if the connection between PC and printer
port is proper. If you use windows, check if the
printer driver in the controller is set up. If the printer
driver is properly set up, check in which program
the printing is not working. The best way to find out
is to open the memo pad to check the function of
printing. If it is not working in a certain program,
adjust the setup the program requires. Sometimes,
the printout is normal within the Windows basic
programs, but it's not working in a particular
program. In such case, install the new driver again.
If not working in the Windows basic program,
Check the setup of the port of CMOS is on ECP.
And check the address of IRQ 7 and 378
3. Printing is not working in the Windows.
4. Check if the printer
cable is directly connected to
peripheral devices
Service Manual
If the scanner needs to be connected to the printer,
first the remove the scanner from the PC to see if
the printer is properly working alone.
4-37
Samsung Electronics
Alignment & Troubleshooting
2) The printer is not working (2)
• Description
After receiving the printing order, no response at all or the low speed of printing
occurs due to wrong setup of the environment rather than malfunction of the printer itself.
1. Secure more space of the hard disk.
Not working with the message 'insufficient printer
memory' means hard disk space problem rather
than the RAM problem. In this case, provide more
space for the hard disk. Secure more space using
the disk utilities program.
2. Printing error occurs even
if there is enough space in
the hard disk.
The connection of the cable and printer port is not
proper. Check if the connection is properly done
and if the parallel port in CMOS is rightly set up.
3. Check the parallel-port-related
items in the CMOS Setup.
As a printer port, Select ECP or SPP among
SPP(Normal), ECP, and EPP modes(increase
printing speed) SPP normal mode support 8-bit
data transfer, while ECP Mode transfer the 12-bit
data.
4. Reboot the system to print.
If the regular font is not printing, the cable or the
printer driver may be defective.
Turn the PC and printer off, and reboot the system
to print again. If not solved, double-click the printer
in my computer If the regular fonts are not printed
this time again. the cable must be defective so
replace the cable with new one.
Service Manual
4-38
Samsung Electronics
Alignment & Troubleshooting
3) Abnormal Printing
• Description
The printing is not working properly even when the cable has no problem.
(even after the cable is replaced)
If the printer won't work at all or the strange fonts are repeated, the printer driver may be
defective or wrong setup in the CMOS Setup.
Select SPP(Normal) or ECP LPT Port the among
ECP, EPP or SPP in the CMOS Setup.
1. Set up the parallel port in
the CMOS SETUP.
Check the printer in My Computer.(to see if the
printer driver is compatible to the present driver
or delete the old driver, if defective and reinstall
the new driver)
2. Printer Driver Error.
3. Error message from
insufficient memory. (The printing
job sometimes stops or due to insufficient
virtual memory, but it actually comes
from the insufficient space of
the hard disk.)
Service Manual
Delete the unnecessary files to secure enough
space of the hard disk and start printing job again.
4-39
Samsung Electronics
Alignment & Troubleshooting
4) SPOOL Error
• Description
To spool which stands for "simultaneous peripheral operations online" a computer document
or task list (or "job") is to read it in and store it, usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time (for example,
when a printer is finished printing its current document).
1. Insufficient space of
the hard disk in the directory assigned
for the basic spool.
Delete the unnecessary files to provide more
space to start printing job.
If there are some files with the extension name
of ****.jnl, Delete them and Reboot the Windows
to restart printing job.
2. If the previous printing error not solved.
Shut down all other programs except the current
one, if possible.
3. When expected to collide with
other program.
4. When an application
program or the printer driver is
damaged.
Delete the printer driver completely and
reinstall it.
After rebooting the computer, check for viruses,
restore the damaged files and reinstall the
program to do the printing job.
5. When some files related
to OS are damaged or virus
infected.
Continue..
Service Manual
4-40
Samsung Electronics
Alignment & Troubleshooting
Continue..
Add up enough memory to the PC.
6. Memory is less than suggested one.
How to delete the data in the spool manager.
In the spool manager, the installed drivers and the list of the documents waiting to be printed are shown.
Select the document to be deleted and check the delete menu.
If you intend to delete the current document being printed, the data being transferred to the printer will be put
out and then the document is removed. Before choosing the document, the menu is still inactive.
Or put the document out of the list and repeat the routine as in the above or finish the spool manager.
Service Manual
4-41
Samsung Electronics
Alignment & Troubleshooting
4.2.5 Bad image
1) Vertical Black Line and Band
• Description
1. Straight thin black vertical lines are shown in the print-out.
2. Dark black vertical bands are shown in the print-out.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Damaged develop roller in
the Toner cartridge. Deformed Doctor-blade
or cleaning-blade.
2. Scratched surface of
the charge roller in the toner cartridge.
If causes 1 and 2 occur in the
toner cartridge, replace the toner
cartridge and try to print out.
Replace the transfer roller if
occurred as No. 3.
3. Partly depression or
deformation on the surface of
the transfer roller.
Service Manual
4-42
Samsung Electronics
Alignment & Troubleshooting
2) Vertical White Line
• Description
White vertical voids in the image.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Foreign matter stuck onto the
window of internal lenses
of LSU mirror.
2. Foreign matter or
toner particles between the toner
cartridge roller and blade. (In case the life of the
toner cartridge has been expired, white
lines or light image occur in
front of the image.)
Replace the toner cartridge.
3. It may occur when Burr and
foreign substances are on the window
of the toner cartridge frame.
No 3. : Remove the foreign matter
and burr of the exposure window.
(toner cartridge)
4. If the fuser is defective,
voids occur periodically at the
top of a black image.
No. 4. : Open the front cover and
check ribs that corresponds to the
position of the voids. Remove if
found.
5. It may occur when foreign
substances are on the OPC Drum.
Service Manual
Foreign matter stuck onto the
window : Clean the LSU window
with recommended cleaner(IPA)
Clean the window with a clean
cotton swab.
4-43
If the problems are not solved,
replace the toner cartridge.
Samsung Electronics
Alignment & Troubleshooting
3) Horizontal Black Band
• Description
Dark or blurry horizontal stripes occur in the printing periodically.
(They may not occur periodically.)
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Service Manual
1. Bad contacts of the voltage
terminals to developer.
Clean each voltage terminal of the
Charge, Supply, Develop and
Transfer roller.(remove the toner
particles and paper particles)
2. The rollers of
developer may be stained.
OPC Drum = 75.5mm
Charge Roller = 37.7mm
Supply Roller = 47.5mm
Develop Roller = 35.2mm
Transfer
ransfer Roller = 46.2mm
Heat Roller = 63.9mm
Pressure Roller = 75.4mm
1. Clean the right Gear that has
relatively small gap of the teeth
in the OPC.
2. If the malfunction persists,
replace the developer.
4-44
Samsung Electronics
Alignment & Troubleshooting
4) Black/White Spot
• Description
1. Dark or blurry spots occur periodically in the printing
2. White spots occur periodically in the printing
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. If dark or blurry
black spots occur periodically,
the rollers in the Developer may be contaminated with foreign matte or paper particles.
(Charge roller : 37.7mm interval
OPC drum : 75.5mm interval)
Print several OPC cleaning Mode
Prints and then run the Self-test
2 or 3 times.
2. If faded areas or voids
occur in a black image at intervals
of 75.5 mm, or black spots occur elsewhere,
the OPC drum surface is
damaged.
In case of 75.5 mm interval
unremovable in 1, cleanly remove
foreign substances stuck on the OPC
location equivalent to black spots and
white spots with a dry duster.
1. The transfer roller guarantees
50.000 sheets printing. If the
roller's life is expired, replace it.
2. In case of 37.7 mm interval
unremovable in 1, take measures
as to replace the develop-er
cartridge and try to print out.
5. Clean the inside of the set against
the paper particles and foreign
matter in order not to cause the
trouble.
3. If a black image is
partially broken, the transfer voltage is
abnormal or the transfer roller's
life has expired.
Service Manual
4-45
Samsung Electronics
Alignment & Troubleshooting
5) Light Image
• Description
The printed image is light, with no ghost.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Develop roller is stained when
the toner of toner cartridge is almost
consumed.
2. Ambient temperature is below than 10°C.
Replace the developer cartridge
and try to print out.
3. Bad contact caused by the toner
stains between the high voltage terminal in
the HVPS and the one in the set.
Wait 30 minutes after printer is
powered on before you start printing.
4. Abnormal output from the HVPS.
Service Manual
Check if the Toner Save mode is off.
4-46
1. Clean up the contaminated area
by the toner.
2. Replace the HVPS if the
problems are not solved by the
above four directions.
Samsung Electronics
Alignment & Troubleshooting
6) Dark Image or a Black Page
• Description
The printed image is dark.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. No charge voltage
in the engine board.
( Perform DCU diagnostic code 01)
2. Charge voltage is not
turned on due to the bad
contacts between power supply in the
side of the Developer and charge
terminal of HVPS.
Service Manual
4-47
Clean the high voltage charge
terminal.
1. Check the state of the connector
which connects the engine board
and HVPS.
2. Replace the HVPS if not solved
by the above direction 1 and 2.
Samsung Electronics
Alignment & Troubleshooting
7) Uneven Density
• Description
Print Density is uneven between left and right.
1. The pressure force
on the left and right springs of the
transfer roller is not even, the springs are
damaged, the transfer roller is improperly
installed, or the transfer roller
bushing or holder is
damaged.
2. The toner level is not
even on the developer roller due to
the bad blade.
Service Manual
4-48
Replace both the left and right
Spring Holder.
Occur in the developer cartridge,
replace the developer and try to
print out.
Samsung Electronics
Alignment & Troubleshooting
8) Background
• Description
Light dark background appears in whole area of the printing.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Does character exist less than
2% per a page, and hasn’t it been
used long time?
The toner cartridge is basically
designed to print 2,000 sheets
with 5% image.
The A/S is not guaranteed if using
recycle paper.
2. Does recycle paper be used?
Replace the developer when the
life span of it has been ended.
3. Has the life span of the
developer ended?
4. Is the movement(Up and Down)
of the transfer roller smooth?
If the problem is still not solved,
replace the developer.
5. Is the HVPS normal?
Service Manual
Clean the bushing part of the
transfer roller.
4-49
Samsung Electronics
Alignment & Troubleshooting
9) Ghost (1)
• Description
75.5mm
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.
1. Bad contacts
caused by contamination from
toner particles between high voltage
terminal in the main body and the
electrode of the
Developer.
2. Bad contacts
caused by contamination
from toner particles between high
voltage terminal in the main body and the
one in the HVPS board.
3. The life of developer is expired.
Service Manual
Clean the terminals when
contaminated by toner particles.
Occur in the developer cartridge,
replace the developer and try to
print out.
Replace the engine board if not
solved by the above directions 1-2.
4. Transfer roller lifetime
(50.000 sheets) has expired.
If not solved by the direction 3,
check the transfer roller lifetime
and replace it.
5. Abnormal low temperature
(below 10°C).
Wait about 1 hour after power on
before using printer.
4-50
Samsung Electronics
Alignment & Troubleshooting
10) Ghost (2)
• Description
75.5mm
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing.
(When printing on card stock or transparencies using manual feeder)
When printing on card stock
thicker than normal paper or
transparencies such as OHP, higher
transfer voltage is
required.
Service Manual
4-51
Select 'Thick Mode' on paper type
menu from the software application
and after using returning to the
original mode is recommended.
Samsung Electronics
Alignment & Troubleshooting
11) Ghost (3)
• Description
47.5mm
Digital
Digital Printer
Printer
Digital
Digital Printer
Printer
White ghost occurs in the black image printing at 47.5mm intervals.
Digital
Digital Printer
Printer
Occur in the developer cartridge,
replace the developer and try to
print out.
1. The life of the developer
may be expired.
2. The abnormal voltage and
bad contact of the terminal of the
supply roller
Service Manual
4-52
Check the approved voltage of the
supply roller and contact of the
terminal and adjust if necessary.
Samsung Electronics
Alignment & Troubleshooting
12) Ghost (4)
• Description
47.5 or 63.9mm
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Ghost occurs at 47.5mm(or 63.9mm) intervals.
Disassemble the fuser and
remove the contaminated toner
particles on the roller and clean
the foreign matter between
Thermistor and Heat roller.
( Caution : can be deformed)
The temperature of the fuser
is maintained high.
Service Manual
4-53
Samsung Electronics
Alignment & Troubleshooting
13) Stains on the Face of Page
• Description
The background on the face of the printed page is stained.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
1. Toner leakage due to
improperly sealed developer.
Replace the developer cartridge.
2. If the transfer roller is
contaminated, stains on the face of
page will occur.
Service Manual
4-54
If the transfer roller is contaminated,
run PC Cleaning Mode Print 2 or 3
times.
And perform Self-Test 2 or 3 times
to remove contamination.
Samsung Electronics
Alignment & Troubleshooting
14) Stains on Back of Page
• Description
The back of the page is stained at 47 mm intervals.
Digital
Digital Pri
Digital Printer
Digital Printer
Digital Printer
1. Transfer roller is contaminated.
2. Pressure roller is contaminated.
Service Manual
4-55
Perform the OPC Cleaning Mode
Print 2 or 3 times. Run Self-Test to
remove the contamination of the
transfer roller.
1. Replace the transfer roller if
contaminated severely.
2. Disassemble the fuser and clean
the H/R(Heat Roller) and P/R
(Pressure roller). And check the
area between H/R and
Thermistor. If contaminated,
clean the area not to be deformed.
Samsung Electronics
Alignment & Troubleshooting
15) Blank Page Print out (1)
• Description
Blank page is printed.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Remove contamination of the
terminals of the developer and
the unit.
Bad ground contacts in
OPC and/or developer.
Service Manual
4-56
Samsung Electronics
Alignment & Troubleshooting
16) Blank Page Print out (2)
• Description
1. Blank page is printed.
2. One or several blank pages are printed.
3. When the printer turns on, several blank pages print.
Remove contamination of the
terminals of the developer.
1. Bad ground contacts in
OPC and/or developer.
1. Perform the engine self test using
DCU to check if the Solenoid is
normal.(refer to code 06)
2. If not solved by the above
directions 1-2, Replace the
engine board.
3. Turn the power off, delete the
data of PC and try printing again.
2. Abnormal solenoid.
Service Manual
4-57
Samsung Electronics
ExplodedView and Parts list
5. Exploded Views and Parts List
Contents
5.1
Main Assembly
5-2
5.2
Frame Assembly(ML-2240)
5-5
5.3
Frame Assembly(ML-1640)
5-7
5.4
Fuser Unit
5-9
5.5
Paper Path Unit
5-11
5.6
MP Tray Assembly (Only ML-2240)
5-13
LASER PRINTER
The keynote of Product
- Speed
ML-1640 : 16 ppm (A4), 17 ppm( Ltr)
ML-2240 : 22ppm (A4), 23 ppm (Ltr)
- Emulation : GDI
- Processor : 150 Mhz Jupiter4e CPU
- Memory : 8 MB
- Toner cartridge : Initial (0.7K), Sales (1.5K)
- MP tray : Only ML-2240
- Interface : Full Speed USB 2.0
- Machine life : 50K (pages)
Service Manual
5-1
Samsung Electronics
ExplodedView and Parts list
5.1 Main Assembly
24
2-1
2-2
2-4
2-5
2
2-6
0
2-7
2-8
2-9
2-3
2-10
5
5-1
9
14
4
7
12
11
10
8
1
17
21
15-1
15-2
15
16
13
20
6
3-5
3-3
19
3-4
18
3-2
3
3-1
Service Manual
5-2
Samsung Electronics
ExplodedView and Parts list
Main Parts List
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.1-0
5.1-0
5.1-1
5.1-1
5.1-2
5.1-2
5.1-2-1
5.1-2-1
5.1-2-2
5.1-2-2
5.1-2-3
5.1-2-3
5.1-2-4
5.1-2-4
5.1-2-5
5.1-2-6
5.1-2-7
5.1-2-8
5.1-2-9
5.1-2-10
5.1-3
5.1-3
5.1-3-1
5.1-3-1
5.1-3-2
5.1-3-2
5.1-3-3
5.1-3-3
5.1-3-4
5.1-3-5
5.1-4
5.1-5
5.1-5
5.1-5-1
5.1-6
ML-2240
ML-1640
JC96-05123A
JC96-05120A
JC97-03181A
JC97-03182E
JC61-01460D
JC61-01460E
JC63-01886A
JC63-01886M
JC63-01887A
JC63-01887B
JC63-01888A
JC63-01888B
JC72-01343A
JC64-00406A
6107-001169
JC67-00301A
JC66-02005A
JC61-00049A
JC97-03183A
JC97-03184A
JC63-01883A
JC63-01883B
JC63-01885A
JC63-01885B
JC63-01890A
JC63-01890B
JC63-00628F
JC63-00629F
JC96-04065A
JC63-01892A
JC63-01892B
JC31-00092A
JC96-05045A
SET
SET
ELA UNIT-FRAME
ELA UNIT-FRAME
MEA-COVER MAIN
MEA-COVER MAIN
GUIDE-STACKER COVER
GUIDE-STACKER COVER
COVER-TOP
COVER-TOP
COVER-MAIN
COVER-MAIN
COVER-JAM
COVER-JAM
PMO-SUB_M_STACKER
KEY-ONLINE
SPRING-CS
LENS-LED
ACTUATOR-JAM
SPRING ETC-TR(KOR)
MEA UNIT-COVER FRONT
MEA UNIT-COVER FRONT
COVER-FRONT
COVER-FRONT
COVER-CASSETTE
COVER-CASSETTE
COVER-DUMMY CASSETTE
COVER-DUMMY CASSETTE
TRAY-EXTENSION LARGE
TRAY-EXTENSION SMALL
ELA UNIT-LSU
COVER-SMPS
COVER-SMPS
FAN
CARTRIDGE-TONER
Service Manual
QT’Y
5-3
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
2
2
1
1
1
1
1
1
1
Service Grade
SA
SA
SA
SA
SNA
SNA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SA
SNA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
A
A
A
A
B
B
B
B
B
B
B
B
D
D
B
B
B
B
B
B
B
B
B
B
B
B
B
B
A
B
B
A
B
Remark
2240
1640
1640
1645
1640
1645
1640
1645
1640
1645
1640
1645
1645
1640
1640
1645
1640
1645
1640
1645
1640
1645
1640/2240
Samsung Electronics
ExplodedView and Parts list
Main Parts List
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.1-7
5.1-7
5.1-7
5.1-7
5.1-8
5.1-9
5.1-10
5.1-10
5.1-10
5.1-10
5.1-11
JC96-05121A
JC96-05122B
JC96-05124A
JC96-05125A
JC63-01930A
JC39-00936A
JC44-00109A
JC44-00110A
JC44-00086A
JC44-00087A
JC92-02027A
ELA HOU-FUSER
ELA HOU-FUSER
ELA HOU-FUSER
ELA HOU-FUSER
SHIELD-ENGINE
HARNESS-LSU
SMPS-V1_VE
SMPS-V2C_VE
SMPS-V1
SMPS-V2C
PBA-MAIN
1
1
1
1
1
1
1
1
1
1
1
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
A
A
A
A
B
B
A
A
D
D
B
5.1-11
JC92-02018A
PBA-MAIN
1
SA
B
5.1-12
5.1-12
5.1-13
5.1-14
5.1-15
5.1-15-1
5.1-15-2
5.1-16
5.1-17
5.1-18
5.1-18
5.1-19
5.1-20
5.1-21
JC39-00937A
JC39-00932A
JC39-00400A
JC39-00402A
JC96-01672A
JC61-00031A
JC70-40912A
JC44-00167A
JC63-00631A
3903-000042
3903-000085
3722-002303
JC97-02239G
JC31-00085A
HARNESS-MOTOR
HARNESS-MOTOR
CBF HARNESS-HVPS
CBF HARNESS-SMPS
ELA UNIT-TERMINAL TR L
SPRING ETC--HV LARGE
ICT-SHAFT HV LARGE
HVPS
GROUND-P-HVPS
CBF-POWER CORD
CBF-POWER CORD
JACK-USB
MEA UNIT-MP TRAY
FAN-DC
1
1
1
1
3
1
1
1
2
1
1
1
1
1
SA
SA
SA
SA
SA
SNA
SA
SA
SNA
SA
SA
SA
SA
SA
B
B
A
A
D
A
D
A
A
B
B
A
A
A
Service Manual
QT’Y
5-4
Service Grade
Remark
1640/110V
ML-1640/XIP
2240/110V
2240/220V
1640/110V
1640/220V
2240/110V
2240/220V
1640
2240
220V
110V
2240
Samsung Electronics
ExplodedView and Parts list
4
16
7
1
5
5-1
5-3
8
5-2
5-4
12
5-5
10
11
5-6
9
5-7
3
2
2-3
10
2-1
2-4
2-2
2-3
14
15
13
0
6
5.2 Frame Assembly (ML-2240)
Service Manual
5-5
Samsung Electronics
ExplodedView and Parts list
Frame Parts List(ML-2240)
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.2-0
5.2-1
5.2-2
5.2-2-1
5.2-2-2
5.2-2-3
5.2-2-4
5.2-3
5.2-4
5.2-5
5.2-5-1
5.2-5-2
5.2-5-3
5.2-5-4
5.2-5-5
5.2-5-6
5.2-5-7
5.2-6
5.2-7
5.2-8
5.2-9
5.2-10
5.2-11
5.2-12
5.2-13
5.2-14
5.2-15
5.2-16
JC96-05123A
JC61-02567A
JC97-02218A
JC61-01158A
JC66-00720A
JC72-01004A
JC74-00011A
JC61-01258A
JC61-01259A
JC96-05018A
JC61-02619A
JC61-02577A
JC66-01998A
JC31-00090B
JC66-01999A
JC66-00806A
6031-000023
JC97-02218A
JC70-00500C
JC70-00499C
JG66-40003A
JC61-00836A
JC66-00807A
JC66-00808A
JC66-00822A
JB61-00076A
JC63-00622A
6107-001503
ELA UNIT-FRAME
FRAME-BASE
MEA UNIT-PLATE KNOCK_UP
PLATE-M-KNOCK_UP
SHAFT-P-CORE
PMO-IDLE KNOCK UP MP
MPR-PAD KNOCK UP MP
SPRING ETC-TORSION DEVE_L
SPRING ETC-TORSION DEVE_R
ELA UNIT-DRIVE
BRACKET-GEAR
BRACKET-MOTOR
GEAR-RDCN A
MOTOR BLDC
GEAR-RDCN B
GEAR-OPC DR 76/38/29
WASHER-PLAIN
MEA UNIT-PLATE KNOCK_UP
ADJUST-CASSETTE_R
ADJUST-CASSETTE_L
GEAR-PINION
FOOT-FRONT
GEAR-FUSER DR 63/35
GEAR-FEED DR 41
LEVER-M-ACTUATOR_EMPTY
SPRING ETC-TORSION DOC (CC2-F)
GROUND-P-OPC
SPRING-CS
Service Manual
QT’Y
5-6
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
2
1
1
1
1
1
2
Service Grade
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SNA
SNA
SNA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
Remark
A
A
A
A
A
A
A
A
A
A
D
B
B
A
B
A
A
A
A
A
A
A
A
A
A
A
A
A
Samsung Electronics
ExplodedView and Parts list
4
20
7
19
5
8
11
5-1
1
14
5-3
5-2
10
12
13
5-4
9
2
3
2-3
2-1
10
2-4
2-2
2-3
16
17
15
0
6
5.3 Frame Assembly(ML-1640)
Service Manual
5-7
Samsung Electronics
ExplodedView and Parts list
Frame Parts List(ML-1640)
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.3-0
5.3-1
5.3-2
5.3-2-1
5.3-2-2
5.3-2-3
5.3-2-4
5.3-3
5.3-4
5.3-5
5.3-5-1
5.3-5-2
5.3-5-3
5.3-5-4
5.3-6
5.3-7
5.3-8
5.3-9
5.3-10
5.3-11
5.3-12
5.3-13
5.3-14
5.3-15
5.3-16
5.3-17
5.3-18
5.3-19
JC96-05120A
JC61-01152A
JC97-02218A
JC61-01158A
JC66-00720A
JC72-01004A
JC74-00011A
JC61-01258A
JC61-01259A
JC96-05116A
JC61-01153A
JC61-01154A
JC66-00804A
JC31-00112A
JC97-02218A
JC70-00500C
JC70-00499C
JG66-40003A
JC61-00836A
JC66-00805A
JC66-00806A
JC66-00807A
JC66-00808A
JC66-00822A
JB61-00076A
JC63-00622A
JC61-00025A
JC67-00110A
ELA UNIT-FRAME
FRAME-M-BASE
MEA UNIT-PLATE KNOCK_UP
PLATE-M-KNOCK_UP
SHAFT-P-CORE
PMO-IDLE KNOCK UP MP
MPR-PAD KNOCK UP MP
SPRING ETC-TORSION DEVE_L
SPRING ETC-TORSION DEVE_R
ELA UNIT-DRIVE
BRACKET-P-GEAR
BRACKET-P-MOTOR
GEAR-RDCN 139/83
MOTOR STEP
MEA UNIT-PLATE KNOCK_UP
ADJUST-CASSETTE_R
ADJUST-CASSETTE_L
GEAR-PINION
FOOT-FRONT
GEAR-RDCN 113/83
GEAR-OPC DR 76/38/29
GEAR-FUSER DR 63/35
GEAR-FEED DR 41
LEVER-M-ACTUATOR_EMPTY
SPRING ETC-TORSION DOC (CC2-F)
GROUND-P-OPC
SPRING ETC-CS-CHARGE APOLLO
CAP-M-MOTOR
Service Manual
QT’Y
5-8
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
Service Grade
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SNA
Remark
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
Samsung Electronics
ExplodedView and Parts list
7
23
12
23
17
31
20
29
25
24
19
18
21
16
0
15
5
2
27
11
4
1
32
6
10
3
14
30
9
8
26
13
28
7
6
5.4 Fuser Unit
Service Manual
5-9
Samsung Electronics
ExplodedView and Parts list
Fuser Parts List
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.4-0
5.4-0
5.4-0
5.4-0
5.4-1
5.4-2
5.4-3
5.4-4
5.4-5
5.4-6
5.4-7
5.4-8
5.4-9
JC96-05121A
JC96-05122A
JC96-05124A
JC96-05125A
JC61-01162A
JC63-00615A
JC61-01177A
JC66-00810A
JC61-01172A
6107-001168
JC66-10901A
JC61-00595A
JC66-00600A
ELA HOU-FUSER
ELA HOU-FUSER
ELA HOU-FUSER
ELA HOU-FUSER
FRAME-P-FUSER
COVER-M_FUSER
HOLDER-M-EXIT R
GEAR-EXIT_DRV17
HOLDER-M-EXIT F/DOWN
SPRING-CS
BUSH-PRESSURE R
GUIDE-M-INPUT
ROLLER-PRESSURE
1
1
1
1
1
1
2
1
3
2
2
1
1
SA
SA
SA
SA
SNA
SNA
SA
SA
SNA
SA
SA
SNA
SA
A
A
A
A
A
D
A
B
A
D
A
A
A
5.4-10
JC66-00601B
ROLLER-HEAT
1
SA
A
5.4-11
5.4-12
5.4-13
5.4-14
5.4-14
5.4-14
5.4-14
5.4-15
5.4-16
5.4-17
5.4-18
5.4-19
5.4-20
5.4-21
5.4-21
5.4-22
5.4-23
5.4-24
5.4-25
5.4-26
5.4-27
5.4-28
5.4-29
5.4-30
5.4-31
JC66-00564A
JC61-00589A
JC61-00590A
4713-001202
4713-001203
4713-001211
4713-001212
JC66-00824A
JC66-00830A
6107-001163
1404-001451
4712-001032
JC39-00404A
JC39-00403A
JC39-00403B
JC61-00064A
JC61-02580A
JC66-00801A
6031-001051
JC63-00637A
JC63-00639A
JC63-00638A
6044-000001
JC66-00826A
JC67-00085A
GEAR-FUSER Z37
BUSH-M-HR L
BUSH-M-HR R
LAMP-HALOGEN
LAMP-HALOGEN
LAMP-HALOGEN
LAMP-HALOGEN
ROLLER-M-EXIT MAIN
ROLLER-M-EXIT FR
SPRING-CS
THERMISTOR-NTC ASSY
THERMOSTAT
CBF HARNESS-FUSER JOINT
CBF HARNESS-FUSER(110V)
CBF HARNESS-FUSER(220V)
SPRING ETC-CLAW
GUIDE-CLAW
GEAR-EXIT_DR38/25
WASHER-PLAIN
COVER-M-FUSER-DUMMY
COVER-M-LAMP-L
COVER-M-LAMP-R
RING-CS
ROLLER-EXIT F/DOWN
CAP-M-THERMO
1
1
1
1
1
1
1
3
3
3
1
1
1
1
1
4
4
1
1
1
1
1
1
1
1
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SNA
SNA
SNA
SNA
SNA
SA
SNA
D
A
A
A
A
A
D
D
D
D
A
A
A
A
A
A
A
D
A
D
D
D
B
A
A
Service Manual
QT’Y
5-10
Service Grade
Remark
1640/110V
ML-1640/XSA
2240/110V
2240/220V
1640/220V
1640/110V
2240/110V
2240/220V
110V
220V
Samsung Electronics
ExplodedView and Parts list
5.5 Paper Path Unit
16
0
14
17
25
12
15
16
4
28
5
11-3
11-2
2
3
11-1
11
6
13
1
10
9-2
10
9-1
18
9
19
24
29
9-3
7
21
22
8
20
23
27
25
Service Manual
5-11
Samsung Electronics
ExplodedView and Parts list
Paper Path Parts List
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.5-0
5.5-0
5.5-1
5.5-2
5.5-3
5.5-4
5.5-5
5.5-6
5.5-7
5.5-8
5.5-9
5.5-9-1
5.5-9-2
5.5-9-3
5.5-10
5.5-11
5.5-11-1
5.5-11-2
5.5-11-3
5.5-12
5.5-13
5.5-14
5.5-15
5.5-16
5.5-17
5.5-18
5.5-19
5.5-20
5.5-21
5.5-22
5.5-23
5.5-24
5.5-25
5.5-26
5.5-27
5.5-28
5.5-29
JC97-03248A
JC97-03199A
JC61-01161A
JC66-00814A
JB61-00107A
JC70-10232A
JC63-00625A
JC63-00624A
JC63-00623A
JC63-00626A
JC97-02217A
JC61-70911A
JC69-01568A
JC61-01169A
JC66-00815A
JC97-02179A
JC66-00803A
JC66-00802A
6107-001167
JC33-00028B
JC66-00809A
JC61-00588A
JC72-00102A
JC61-70940A
JC66-00725A
JC61-00583A
JC70-00307A
JC66-00829A
JC61-01151A
JC61-01173A
JC73-00211A
JC66-01935A
JC66-01936A
JC66-00813A
JC61-01281A
JC39-00482A
JC61-01548A
MEA UNIT-FRAME PAPER PATH
MEA UNIT-FRAME PAPER PATH
GUIDE-M-PAPER PATH
LEVER-ACTUATOR FEED SENSOR
SPRING ETC-LEVER SENSOR
IPR-PLATE SAW
GROUND-P-VARISTOR
GROUND-P-ZENER
GROUND-P-THV
GROUND-P-SAW
MEA-UNIT HOLDER PAD
SPRING ETC-EXIT ROLL FD
PAD-FRICTION
HOLDER-M-PAD
LEVER-M-KICKER P/U
MEA UNIT-PICK UP GEAR
GEAR-PICK_UP B
GEAR-PICK_UP A
SPRING-CS
SOLENOID-MP
GEAR-FEED 35/19
BUSH-M-TR L
PMO-BUSHING_TR(L)
SPRING ETC-TR(12)
ROLLER-TRANSFER
HOLDER-PTL
IPR-P-EARTH TRANSFER
SHAFT-P-PICK_UP
HOUSING-M-PICK_U
HOUSING-M-PICK_UP B
RUBBER-PICK_UP
CAM-PICKUP L
CAM-PICKUP R
GEAR-TRANSFER
BRACKET-P-BAR_PICK_UP
CBF HARNESS-MICRO SW
HOLDER-M-CAM
Service Manual
QT’Y
5-12
1
1
1
1
1
1
1
1
1
1
1
2
1
1
2
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Service Grade
SA
SA
SA
SA
SA
SA
SNA
SA
SNA
SNA
SA
SA
SNA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SA
SNA
SA
SNA
B
B
A
A
A
D
A
A
A
A
A
A
B
A
D
A
A
A
D
A
A
A
A
A
A
A
A
B
A
A
A
B
B
A
A
A
A
Remark
1640
2240
2240
Samsung Electronics
ExplodedView and Parts list
5.6 MP Tray Assembly (Only ML-2240)
0
5
2
1
3
4
Service Manual
5-13
Samsung Electronics
ExplodedView and Parts list
MP Tray Parts List
*SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE
*Grade : Parts Class”A,B,C,D,E”
Drawer#
SEC_CODE
DESCRIPTION
5.6-0
5.6-1
5.6-2
5.6-3
5.6-4
5.6-5
JC97-02239G
JC61-01263F
JC70-00514E
JC70-00515E
JG66-40003A
JC63-00711A
MEA UNIT-MP TRAY
PLATE-MP
ADJUST-MP L
ADJUST-MP R
GEAR-PINION
SHEET-MP
Service Manual
QT’Y
5-14
1
1
1
1
1
1
Service Grade
SA
SA
SA
SA
SA
SA
Remark
B
B
B
B
B
B
Samsung Electronics
System Diagram
6. System Diagram
Block / Connection Diagram_Peacock22 / Robin
LSU
PICK_UP_CLT
Main
S/W
24VS1
Feed_Sensor
LSU_CLK
nLREADY
nPMOTOR
GND
24VS2
24VS2
N.C
24VS1
24VS1
5V
DGND
DGND
nP_FEED
Fuser_On
24V
C
M
SMPS
FUSER_FAN
N.C
nHSYNC
5VS
DGND
LD_ENABLE
DAC_OUT
VDO+
LSU_SH
VDO-
INLET
SOL
MAIN_MOTOR
24VS2
PickUp_Sol
nHSYNC
5VS
DGND
LD_ENABLE
LSU_CLK
nLREADY
nPMOTOR
GND
24VS2
N.C
24VS2
N.C
24VS1
24VS1
5V
DGND
DGND
nP_FEED
Fuser_On
DAC_OUT
VDO+
LSU_SH
VDO-
5V
TONER_TX
nTONER_RX
DGND
CY25811
TONER_TX_RX
nCRU_DET
N.C
1
a4
a3
a2
a1
b4
b3
b2
b1
5
6
7
8
3.3V
HYPER_TXD
HYPER_RXD
DGND
MICRO S/W
2
24VS2
GND
3
24VS1
MT
4
GND
FAN_Vcc
HVPS
BLDC_DIR
BLDC_CLK
BLDC_READY
BLDC_EN
DGND
BLDC_BREAK
DGND
DGND
24VS2
24VS2
Robin Only
DGND
DCU_CLK
DCU_DATA
5V
Ready/Error
12MHz
N.C
DEV_CLK
DGND
OPC
SDRAM
8MB
DEV
Jupiter4e
3.3V
DEV_DATA
SUP
1.8V Reg
DGND
N.C
THERMISTOR_IN
MHV
nLED_TONER
nP_EMPTY
N.C
BIAS_PWM
nFUSER_FAN
MHV_PWM
THV_READ
THV_PWM
nTHV_EN
5V
nP_EXIT
3.3V
DGND
24VS2
24VS2
Toner
24VS1
24VS1
3.3V Reg
DC
GND
nCRU_DET (Peacock22 Only)
24VS2 / nNEW_DEV (Robin Only)
THV
nLED_ERROR
nLED_READY
nKEY_IN
nLED_TONER
nP_EMPTY
N.C
BIAS_PWM
nFUSER_FAN
MHV_PWM
THV_READ
THV_PWM
nTHV_EN
5V
nP_EXIT
3.3V
DGND
24VS2
24VS2
24VS1
24VS1
GND
GND
GND
D+
DVBUS
GND
FAN_Vcc
DC
nLED_ERROR
nLED_READY
nKEY_IN
HYPER
USB
DEVE
SMPS_FAN
THERMISTOR
Service Manual
6-1
CRUM
DCU
Peacock Hardware Team
Digital Priting Div.
Samsung Electronics
Jan.21.2008
Samsung Electronics
Reference information
7. Reference Information
This chapter contains the tools list, list of abbreviations used in this manual, and a guide to the
location space required when installing the printer. A definition of tests pages and Wireless
Network information definition is also included.
7.1 Tool for Troubleshooting
The following tools are recommended safe and easy troubleshooting as described in this service manual.
• DCU (Diagnostic Control Unit)
• Cotton Swab
Standard : For general home use, for medical service.
Standard : Test equipment to diagnose the Laser
printer supplied by Samsung Electronics.
• Cleaning Equipments
Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or
a gentle neutral detergent and lint-free cloth.
• DVM (Digital Volt Meter)
Standard : Indicates more than 3 digits.
• Vacuum Cleaner
• Driver
Standard : "-" type, "+" type (M3 long, M3 short, M2
long, M2 short).
• Software (Driver) installation CD ROM
• Tweezers
Standard : For general home use, small type.
Service Manual
7-1
Samsung Electronics
Reference information
7.2 Acronyms and Abbreviations(1)
The table below explains the abbreviations and acronyms used in this service manual. Where abbreviations
or acronyms are used in the text please refer to this table.
Abbreviations
Explanation
AP
Access Point
AC
Alternating Current
APC
Auto Power Control
ASIC
Application Specific Integrated Circuit
ASSY
assembly
BIOS
Basic Input Output System
BLDC
Brush-less Direct Current
CMOS
Complementary Metal Oxide Semiconductor
CN
connector
CON
connector
CPU
Central Processing Unit
dB
decibel
dbA
decibel A
dBM
decibel milliwatt
DC
direct current
DCU
Diagnostic Control Unit
DPI
Dot Per Inch
DRAM
Dynamic Random Access Memory
DVM
Digital Voltmeter
ECP
Enhanced Capability Port
EDC
Embedded Diagnostic control
EEPROM
Electronically Erasable Programmable Read Only Memory
EMI
Electro Magnetic Interference
EP
electrophotographic
EPP
Enhanced Parallel Port
FPOT
First Printout Time
F/W
firmware
GDI
graphics device interface
GND
ground
HBP
Host Based Printing
HDD
Hard Disk Drive
H/H
High temperature and high marshy place
HV
high voltage
HVPS
High Voltage Power Supply
I/F
interface
I/O
Input and Output
IC
integrated circuit
IDE
Intelligent Drive electronics or Imbedded Drive Electronics
Service Manual
7-2
Samsung Electronics
Reference information
Acronyms and Abbreviations(2)
Abbreviations
Explanation
IEEE
Institute of Electrical and Electronics Engineers. Inc
IPA
Isopropy Alcohol
IPM
Images Per Minute
LAN
local area network
lb
pound(s)
LBP
Laser Beam Printer
LCD
Liquid Crystal Display
LED
Light Emitting Diode
L/L
Low temperature and low marshy place
LSU
Laser Scanning Unit
MB
megabyte
MHz
megahertz
MPF
Multi Purpose Feeder
NIC
Network Interface Card
N/N
Normal temperature and normal marshy place
NVRAM
nonvolatile random access memory
OPC
Organic Photo Conductor
OPE
Operate Panel Equipment
PBA
Printed Board Assembly
PCL
Printer Command Language , Printer Control Language
PDL
Page Discription Language
PPM
Page Per Minute
PPS
Pulse Per Second
PS
Post Script
PTL
Pre-Transfer Lamp
PWM
Pulse Width Modulation
Q-PID
Quick Printer Initiating Device
Q ty
quantity
RAM
Random Access Memory
ROM
Read Only Memory
SCF
Second Cassette Feeder
SMPS
Switching Mode Power Supply
SPGP
Samsung Printer Graphic Processor
SPL
Samsung Printer Language
Spool
Simultaneous Peripheral Operation Online
SW
switch
sync
synchronous or synchronization
USB
Universal Serial Bus
WECA
Wireless Ethernet Compatibility Alliance
Service Manual
7-3
Samsung Electronics
Reference information
7.3 Selecting printer locations
• Leave enough room to open the printer trays, covers, and allow for proper ventilation. (see diagram
below)
• Provide the proper environment :
- A firm, level surface
- Away from the direct airflow of air conditioners, heaters, or ventilators
- Free of extreme fluctuations of temperature, sunlight, or humidity
- Clean, dry, and free of dust
Service Manual
7-4
Samsung Electronics
Reference information
7.4 Sample Tests Patterns
The sample patterns shown below are the standard test patterns used in the factory.
The life of the toner cartridge, developer cartridge and printing speed are measured with the pattern shown
below (5%). The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4
size.
A4 ISO 19752 Standard Patterns
Service Manual
7-5
Samsung Electronics
Reference information
7.5 Parts Life Cycle Maintenance Table
7.5.1 Parts Life Cycle Maintenance Table
Supplies
Toner Cartridge
Fuser
Life Cycle
Condition
Panel LED
Custmoer Panel Manage
1.5K: For Product Toner Low
Toner LED : Red LED blinking
-
0.7K: For Sale
Online /Error LED : Red
-
50,000(page)
Toner Uninstall
Thermistor Open Error On line/Error LED : Red
(DCU Code : 60)
Replaced at
Exhauseted
Low Heat Error
(DCU Code : 62)
On line/Error LED : Red
Replaced at
Exhauseted
Over Heat Error
(DCU Code : 68)
On line/Error LED : Red
Replaced at
Exhauseted
Transer Roller
50,000(page)
Exhauseted
No Indication
Replaced at
Exhauseted
PickUP Roller
50,000(page)
Exhauseted
No Indication
Replaced at
Exhauseted
Responding
10% Remains
7.5.2 Toner Cartridge Criterion
1) Supplies Criterion (Toner Cartridge)
1. Cartridge Main Defects
- White Point, Black Point : White or Black point on printing image
- Image contamination : Dirty printing image
- Image Fainted : Entire Image is fainted and vertical white line emerge
- Black Line : Vertical black line emerge on printing image
2) Defect Symptoms
Symptoms
Criterion
Remarks
White, Black Point
Clean Up OPC (10 times), if disappeared, no failure.
- If continuous, failure
System Setup ->
Maintenance-> Clean Drum
Image contamination
(Toner leakage)
Drity printing image or conteminated reverse side
- Clean up OPC (10 times) and inside of machine with cloth, if disappeared, no failure.
Image Fainted
After shake cartridge right and left 5~6 times, if printing image is not fainted, no failure.
(Toner Exhausted)
Vertical Black Line
Vertical thin line emerge, if cartridge is scratched.
- (Customer fault)
Service Manual
7-6
Samsung Electronics
Reference information
7.6 Model Information
7.6.1 Understanding for Model Code
Model code is inscribed and managed by product standard operation.
If understand the standard operation. It will help to comprehend basic and derived model.
Classification
Model abbriviation
DIGIT
1
2
3
Example
M
L
Definition
Product Classification
Color
Product
Code
Description
Printer
Class of
Product
Description
:M
Default =
Omissoin.
Only color
printer
“C” initial
.Engine = E
Laser
Beginning
letter of
printer
Description:
L
Feature/Properties
4
5
6
7
8
-
1
6
4
0
Division
between
code
1. Speed of Engine
- If same speed models
are released
simultaneously higher
model is added +1 at
speed code.
- If over 10 models with
same speed are brought
into, tenth model is
added +1.
2. Domestic Entry Model
Distribution
- C&C : Engine speed
- Information : The first
number deleted
Description
Alphabet
Classification
-
1
2
Example
M
L
Definition
Product Classification
Color
Product
Code
Description
Printer
Class of
Product
Description
:M
Default =
Omissoin.
Only color
printer
“C” initial
.Engine = E
Laser
Beginning
letter of
printer
Description:
L
3
Service Manual
Alphabet
1. Basic : 0
Digit
Alphabet
Feature/Properties
4
5
6
7
8
-
2
2
4
0
1.New model,
series model
division
- Over 3rd grade
project
1. Basic : 0
Division
between
code
1. Speed of Engine
- If same speed models
are released
simultaneously higher
model is added +1 at
speed code.
- If over 10 models with
same speed are brought
into, tenth model is
added +1.
2. Domestic Entry Model
Distribution
- C&C : Engine speed
- Information : The first
number deleted
Description
10
Main feature Space
description (Basic:Omitt
2.Series
- N : N/W
ed)
model divi- - P : PS
sion
- S : N/W+PS
- Below 4th - B : Bluetooth
grade
2.Valuablet
- T : 2nd CST
model division
project
- M : Mac
.PC Bundle
in market
Compatible
despite of not .Domestic
- X : Scanner
over 3rd grade distribution . Beside
- VE model, etc. (Entry model abovefeature
(Valuable model excepted)
description,
is decided
product
byproduct
conception
planning group
to product
with sales
planning
prospect)
group
responsed
1.New model,
series model
division
- Over 3rd grade
project
Model abbriviation
DIGIT
9
-
10
Main feature Space
description (Basic:Omitt
- N : N/W
2.Series
ed)
model divi- - P : PS
sion
- S : N/W+PS
- Below 4th - B : Bluetooth
grade
2.Valuablet
- T : 2nd CST
model division
project
- M : Mac
in market
.PC Bundle
Compatible
despite of not .Domestic
- X : Scanner
over 3rd grade distribution . Beside
- VE model, etc. (Entry model abovefeature
(Valuable model excepted)
description,
is decided
product
byproduct
conception
planning group
to product
with sales
planning
prospect)
group
responsed
Digit
7-7
9
Alphabet
Samsung Electronics
Reference information
7.6.2 Understanding Material Code & Name
Material code and name is maintained by standard criteria.
If understand the criteria, it will help to order materials.
1. Two different description ways for material code. (
: Digit,
: Letter(Alphabet))
ex) 2007-007961 R-CHIP
- Type 1
ex)JB96-01268A ELA UNIT-COVER TOP
- Type 2
Type 1 : Parts managed by entire divisions : Materials used by all samsung products.
Most electrical parts are under the type 1.
Type 2 : Parts managed by a division : Material used by a certain product
Most mechanical parts are under type 2.
2. A/S Only material : Only for A/S, not related to product manufacturing.
3. Ass'y material : More than two materials are assembled. If the material order is out of service, the order can be
processed by Ass'y material order.
Picture and numbers are also described on Service manual.
Ass'y Material and A/S Only material Code are recognizable by product name.
Those are under type 2 and known by material properties and beginning letters of product name.
Classification
Material Code
Material Name
A/S Only Material
**81-******(JB81-00039A)
AS-*****(AS-FUSE)
A/S Only Material
**75-******(JB75-00068A)
MEC-*****(MEC-CHUTE)
A/S Only Material
**92-******(JB92-01131A)
PBA-*****(PBA MAIN-CONTROLLER)
A/S Only Material
**96-******(JB96-01268A)
ELA-*****(ELA UNIT-COVER TOP)
A/S Only Material
**97-******(JB97-01089A)
MEA-*****(MEA UNIT-PULLEY IDLE)
7.6.3 F/W Upgrade Method
If F/W needs Upgrade, F/W file and usbprn file are requested.
Check "Ready" condition with power ON.
1. Paralle cable case
• Start Download Rom file with "copy/b b255_706.fls lpt1:" commend on Dos Mode.
• Once Download are finished, "Reset Printer" is indicated on LCD window.
• Download finished Power ON/OFF.
2. USB cable case (Save attached file at certain directory)
• Start Download Rom file "usbprbs b255_706.fls" on Dos Mode and push the enter key.
• Once Download are finished, "Reset Printer" is indicated on LCD window.
• Download finished Power ON/OFF.
Service Manual
7-8
Samsung Electronics
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