Samsung ML-3561N Series User manual

DIGITAL LASER PRINT CONTENTS
1. Precautions
2. Reference Information
3. Specifications
4. Summary of product
5. Disassembly and Reassembly
6. Alignment and Adjustments
7. Troubleshooting
8. Exploded Views and Parts List
9. Block Diagram
10. Connection Diagram
11. Schematic Diagram
Manual
SERVICE
DIGITAL LASER PRINT
ML-3560 Series
ML-3561N/XAA
Basic Model :ML-3560

Precautions
Samsung Electronics Service Manual
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1
1
1. Precautions
In order to prevent accidents and to prevent damage to the equipment please read the precautions listed
below carefully before servicing the printer and follow them closely.
1.1 Safety Warning
(1) Only to be serviced by appropriately qualified service engineers.
High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably
trained and qualified service engineer.
(2) Use only Samsung replacement parts
There are no user serviceable parts inside the printer. Do not make any unauthorized changes or
additions to the printer, these could cause the printer to malfunction and create electric shock or fire hazards.
(3) Laser Safety Statement
The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for
Class 1(1) laser products, and elsewhere, it is certified as a Class I laser product
conforming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The
laser system and printer are designed so there is never any human access to laser radiation above a Class I
level during normal operation, user maintenance, or prescribed service condition.
Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The
reflected beam, although invisible, can damage your eyes. When using this product, these basic safety
pre-cautions should always be followed to reduce risk of fire, electric shock, and injury to persons.
CAUTION - INVISIBLE LASER RADIATION
WHEN THIS COVER OPEN.
DO NOT OPEN THIS COVER.
VORSICHT - UNSICHTBARE LASERSTRAHLUNG,
WENN ABDECKUNG GE FFNET.
NICHT DEM STRAHLAUSSETZEN.
ATTENTION - RAYONNEMENT LASER INVISIBLE EN CAS
D OUVERTURE. EXPOSITION DANGEREUSE
AU FAISCEAU.
ATTENZIONE - RADIAZIONE LASER INVISIBILE IN CASO DI
APERTURA. EVITARE L ESPOSIZIONE AL
FASCIO.
PRECAUCION - RADIACION LASER IVISIBLE CUANDO SE ABRE.
EVITAR EXPONERSE AL RAYO.
ADVARSEL. - USYNLIG LASERSTR LNING VED BNING, N R
SIKKERHEDSBRYDERE ER UDEAF FUNKTION.
UNDG UDSAETTELSE FOR STR LNING.
ADVARSEL. - USYNLIG LASERSTR LNING N R DEKSEL
PNES. STIRR IKKE INN I STR LEN.
UNNG EKSPONERING FOR STR LEN.
VARNING - OSYNLIG LASERSTR LNING N R DENNA DEL
R PPNAD OCH SP RREN R URKOPPLAD.
BETRAKTA EJ STR LEN. STR LEN R FARLIG.
VARO! - AVATTAESSA JA SUOJALUKITUS OHITETTAESSA
OLETALTTIINA N KYM TT M LLE LASER-
S TEILYLLE L KATSO S TEESEEN.

Samsung Electronics
Service Manual
Precautions
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1.2 Caution for safety
1.2.1 Toxic material
This product contains toxic materials that could cause illness if ingested.
(1) If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the skin
should be avoided, wash any splashes from eyes or skin immediately and contact your doctor. If the liquid gets into
the mouth or is swallowed see a doctor immediately.
(2) Please keep toner cartridges away from children. The toner powder contained in the toner cartridge may be harmful
and if swallowed you should contact a doctor.
1.2.2 Electric Shock and Fire Safety Precautions
Failure to follow the following instructions could cause electric shock or potentially cause a fire.
(1) Use only the correct voltage, failure to do so could damage the printer and potentially cause a fire or electric
shock.
(2) Use only the power cable supplied with the printer. Use of an incorrectly specified cable could cause the cable
to overheat and potentially cause a fire.
(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could lead to
a fire.
(4) Do not allow water or other liquids to spill into the printer, this can cause electric shock. Do not allow paper
clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to an electric
shock or fire hazard..
(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When
servicing the printer remove the power plug from the wall socket.
(6) Use caution when inserting or removing the power connector. The power connector must be inserted com-
pletely otherwise a poor contact could cause overheating possibly leading to a fire. When removing the power
connector grip it firmly and pull.
(7) Take care of the power cable. Do not allow it to become twisted, bent sharply round corners or other wise
damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and
cause a fire or exposed cables could cause an electric shock. Replace a damaged power cable immediately,
do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable,
weakening the cover or exposing cables causing fire and shock risks.
(8) Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should be
repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.
(9) Use caution during thunder or lightening storms. Samsung recommends that this machine be disconnected
from the power source when such weather conditions are expected. Do not touch the machine or the power
cord if it is still connected to the wall socket in these weather conditions.
(10) Avoid damp or dusty areas, install the printer in a clean well ventilated location. Do not position the machine
near a humidifier. Damp and dust build up inside the machine can lead to overheating and cause a fire.
(11) Do not position the printer in direct sunlight. This will cause the temperature inside the printer to rise possibly
leading to the printer failing to work properly and in extreme conditions could lead to a fire.
(12) Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could
make contact with a high voltage conductor inside the machine and cause an electric shock.

Precautions
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1-3
1.2.3 Handling Precautions
The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer
(1) Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause
the printer to tip or fall.
(2) The printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers,
hair or clothing in any of these rotating devices.
(3) Do not place any small metal objects, containers of water, chemicals or other liquids close to the printer which if
spilled could get into the machine and cause damage or a shock or fire hazard.
(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a
humidifier or heater. Damage could be caused to the printer in such areas.
(5) Do not place candles, burning cigarettes, etc on the printer, These could cause a fire.
1.2.4 Assembly / Disassembly Precautions
Replace parts carefully, always use Samsung parts. Take care to note the exact location of parts and also
cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.
Please carry out the following procedures before dismantling the printer or replacing any parts.
(1) Check the contents of the machine memory and make a note of any user settings. These will be erased if the
mainboard or network card is replaced.
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.
(3) Disconnect printer interface cables and power cables.
(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or temperature
rating are correct.
(5) When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.
(6) Take care not to drop any small parts into the machine.
(7) Handling of the OPC Drum
- The OPC Drum can be irreparably damaged if it exposed to light.
Take care not to expose the OPC Drum either to direct sunlight or to fluorescent or incandescent room
lighting. Exposure for as little as 5 mins can damage the surface’s photoconductive properties and will result
in print quality degradation. Take extra care when servicing the printer. Remove the OPC Drum and store it in
a black bag or other lightproof container. Take care when working with the covers(especially the top cover)
open as light is admitted to the OPC area and can damage the OPC Drum.
- Take care not to scratch the green surface of OPC Drum Unit.
If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.

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Precautions
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1.2.5 Disregarding this warning may cause bodily injury
(1) Be careful with the high temperature part.
The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to cool
down before disassembly.
(2) Do not put finger or hair into the rotating parts.
When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor, fan,
etc.). If do, you can get harm.
(3) When you move the printer.
This printer weighs 21kg including toner cartridge and cassette. Use safe lifting and handling techniques. Use
the lifting handles located on each side of the machine. Back injury could be caused if you do not lift carefully.
(4) Ensure the printer is installed safely.
The printer weighs 21Kg, ensure the printer is installed on a level surface, capable of supporting its weight.
Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer.
(5) Do not install the printer on a sloping or unstable surface.After installation, double check that the printer is stable.

Precautions
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1-5
1.3 ESD Precautions
Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called
“Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field
effect transistors, and semiconductor “chip” components.
The techniques outlined below should be followed to help reduce the incidence of component damage caused by
static electricity.
Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any
electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially avail-
able wrist strap device, which should be removed for your personal safety reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as
aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assem-
bly.
3. Use only a grounded tip soldering iron to solder or desolder ESDs.
4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can
generate electrical charges sufficient to damage ESDs.
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to dam-
age ESDs.
6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most
replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a compa-
rable conductive material.
7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the pro-
tective material to the chassis or circuit assembly into which the device will be installed.
8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until com-
pletely plugged or soldered into the circuit.
9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing
together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to
damage an ESD.

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Precautions
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Reference Information
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2. 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.
2.1 Tool for Troubleshooting
The following tools are recommended safe and easy troubleshooting as described in this service manual.
• DVM (Digital Volt Meter)
Standard : Indicates more than 3 digits.
• Driver
Standard : "-" type, "+" type (M3 long, M3 short, M2
long, M2 short).
• Tweezers
Standard : For general home use, small type.
• Cotton Swab
Standard : For general home use, for medical service.
• Cleaning Equipments
Standard :An IPA(Isopropyl Alcohol)dry wipe tissue or
a gentle neutral detergent and lint-free cloth.
• Vacuum Cleaner
• Software (Driver) installation CD ROM

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Reference Information
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2.2 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

Reference Information
Samsung Electronics Service Manual
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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
OP Operation 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
Qty 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
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Samsung Electronics
2.3 Select a location for the printer
• 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

Reference Information
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2-5
2.4 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.

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2.5 Wireless LAN
• This product can be used with a wireless LAN (Option)
- The wireless LAN function uses radio technology, instead of using LAN cable, to connect to an
access point for printing.
- For a wireless LAN connection in Infrastructure mode an AP is needed, (purchased separately)
- For a wireless LAN connection in Ad-Hoc mode an appropriate Wireless I/F card is required fitted
to a computer, (purchased separately)
- It is possible to use a wireless LAN connection with wired LAN.
- If an AP is installed in an office or at home, the wireless LAN function can be simply configured
and used.
• Types of desk top PC (or Lap top) that uses the wireless LAN.
• About the certificated mark of Wi-FiTM
- Wi-FiTM is a registered trademark of the WECA (Wireless Ethernet Compatibility
Alliance). Over 50 wireless LAN companies are member of this organisation. Most of
the main wireless networking companies are attending including such companies as
Lucent Technologies, Cisco, Intel/Symbol, 3Com, Enterasys (Cabletron), Compaq,
IBM, Nokia, Dell, Philips, Samsung Electronics, Sony, Intersil, etc.. This mark certifies
mutual compatibility amongst the product of these companies. Wi-FiTM (IEEE 802.1) is
certified as a standard of the wireless LAN market.
• LED Condition and Status
Division Basic type Recommend type
CPU Over PENTIUM 233M PENTIUM 300MHz
MEMORY Over 64MB Over 128MB
VIDEO CARD Over 800X600 Over 1024X768
OS Over WINDOWS 98 Over WINDOWS ME
INTERFACE CARD A product has a certificated mark of Wi-FiTM
LED Condition Status
Active LED random blink Normal NPC &Normal packet receive
Active LED regular blink Normal NPC &No Packet
Active LED Off/On maintenance NPC Initial inferiority
Link LED On The link LED On OPC,Normally linked
(Red:Wireless,Green:Wire,Orange:Wire/Wireless)
Link LED Off Link LED off NPC,Link Inferiority
Antenna connector
RJ-45 Jack
Active LED(Green)
Link LED
(Red/Green/Orange)
[LED STATUS]

Specifications
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3. Specifications
Product specifications are subject to change without notice.See below for product specifications.
3.1 General Specifications
ITEM DESCRIPTION
Print Method Non-impact Electro-photography
Development system Non-Magnetic, Mono-Component, Non-Contact Developing System
Transfer system Conductive roller transfer
Fuser Unit(Toner fix) Pressure and Heating with e-coil
*Print Speed Up to 33 PPM in A4 size
Up to 35 PPM in Letter size
Resolution Up to 1200 x 1200 DPI effective output
Source of Light Laser diode (LSU : Laser Scanner Unit)
Warm-Up Time Power-on boot : 40 seconds
First Print Time 9 seconds or less
Feed Method Cassette & Manual, Option Feeder(SCF)
duplex Optional
Media Size 76mm * 128mm(3 * 5”) to 216mm * 356mm(8.5 *14”)
Media Thickness 16 ~ 28 lb(60 to 105g/m
2
), Manual : 16 ~43lb(60 to 163g/m
2
)
Dimension(W X D X H) 396 X 453 X 348 mm / 15.6” X 17.8” X 13.7” inch (without options)
Weight Net : 17.5 Kg with print cartrige
Gross : 21 Kg
**Acoustic Noise Stand by : Less than 35 dB
Printing: Less than 55 dB
Sleep mode : Background Noise
Power save mode Enable
Toner save mode Enable
Consumable Parts Retard Roller Up to 150,000 Pages
Transfer Roller Up to 70,000 Pages
Fuser Assembly Up to 80,000 Pages
Toner Sensor Yes(dot counting)
Toner Type Non-Magnetic toner
Toner Initial 6,000 pages@ISO 5% coverage
Toner sale 6,000 or 12,000 pages@ISO 5% coverage
Optional Parts Optional Tray Paper Capacity : 500 Sheets
Wired NPC Ethernet 10/100 base TX
(ML-3560/ML-3561N Protocols : TCP/IP, SPX/IPX, Ethertalk, SNMP,
: Optional HTTP1.1, DLC/LLC
ML-3560 : Basic) 8MB RAM Buffer for faster graphics performance
2MB Flash Memory for upgrade
Throughput : 200 ~ 300K TCP/IP
SDRAM DIMM 32, 64, 128, 256MB 100PIN SDRAM DIMM
Wireless NPC IEEE802.11b supportT
(Option) Speed : 11, 5.5, 2, 1 Mbps
Operation range : 30m(Indoors), 150m(Outdoors)
Duplex Unit
* Print speed will be affected by Operating System used, computing performance, application software, con-
necting method, media type, media size and job complexity.
** Sound Pressure Level, ISO 7779

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Specifications
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3.3 Electrical Specification
ITEM DESCRIPTION REMARK
Input Voltage Nominal input voltage 220-240 VAC / 110~127VAC
Input voltage range 198-254 VAC/ 99~135VAC
Nominal frequency 50/60 MHz
Frequency tolerance +3Hz
Power Consumption
Printing : 600W(average)
Sleep : under 12W
3.2 Controller Specification
ITEM DESCRIPTION
Processor(CPU) SPGPv3 400Mhz
Memory NAND FLASH 32MB
RAM : 32MB
Option DIMM module : 32, 64, 128, 256MB (SDRAM)
100Pin SDRAM DIMM (
Use only Samsung Memory Parts made specifically for this printer. )
EEPROM(NVRAM) : 4Kbyte
Emulation PCL6 : Win9x/ME/NT4.0/2000/XP
Postscript Level3 : MAC OS 8.6 ~ 9.2/10.1 ~ 10.3
PCL5e : Various Linux OS including Red Hat, Caldera, Debian, Mandrake, Slackware,
SuSE and Turbo Linux
Interface Parallel : IEEE 1284 Bidirectional Parallel
- Modes supported : Compatible,Nibble,Byte,ECP
USB(without HUB mode)
-USB 2.0 compliant -High Speed
Network Interface : - 10/100 Base TX
- 802.11b Wireless LAN
Interface switching Automatic
Interface time-out 999 seconds
Font 45 Scalable Font , 1 Bitmap Font ,Postscript 3 internal font 136
3.4 TONER Cartridge (Developer)
ITEM DESCRIPTION REMARK
Life span Starter: Up to 6,000 pages
A4 Size, @ISO 5% Coverage, SIMPLEX
Replacement : Up to 12,000 pages
Developing Non Contact Developing
Charging Conductive Roller Charging
Toner supply Method Not possible, replace the whole print cartridge.
Toner checking sensor Fitted
Ozone 0.1PPM or less
Style Single cartridge

3.6 Paper Handling Specifications
>> Input Paper Size
Supported Paper, Transparencies, and Other Specialty Media
PAPER TYPE/SIZE DIMENSIONS TRAY 1(MPT) TRAY 2 TRAY3 2-SIDED PRINTING
Letter 8.5 x 11 in. O O O O
Legal 8.5 x 14 in. O O O O
US Folio 8.5 x 13 in. O O O O
A4 210 x 297 mm O O O O
B5-JIS 182 x 257 mm O O O
ISO-B5 176 x 250 mm O O O
A5 148 x 210 mm O O O
Executive 7.25 x 10.5 in. O O O
Statement 5.5 x 8.5 in O
US Postcard 3.5 x 5.5 in O
Index Card 3 x 5 in O
A6 Postcard 105 x 148 mm O
Envelopes
Monarch 3.88 x 7.5 in. O
#10 Commercial 4.13 x 9.5 in. O
C5 162 x 229 mm O
C6 114 x 162 mm O
DL 110 x 220 mm O
Transparencies
Letter 8.5 x 11 in. O X X X
A4 210 x 297 mm O X X X
Labels
Letter 8.5 x 11 in. O
A4 210 x 297 mm O
Custom Width = 76~216 mm (3~8.5 in.); O
Length = 127~356 mm (5~14 in.)
Tray 1 (MPT) Weight : 60~163 g/m 2 (16~43 lb.)
Tray 2 and 3 Weight : 60~105 g/m 2 (16~28 lb.)
Duplex Weight : 75~90 g/m 2 (20~24 lb.)
O : Supported
3.5 Environmental Condition
ITEM OPERATING STORAGE
Temperature 10~30
˚ C(50-90 ˚ F) -20~40 ˚ C (-4~104 ˚ F)
Humidity 20~80%RH 10~80%RH
Specifications
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Service Manual
Specifications
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>> Input capacity
>> Output capacity
ITEM DESCRIPTION
Cassette Paper 500 sheets (75gr)
MP tray Paper 100 sheets (75gr)
Transparencies 50 sheets
Envelopes 10 sheets
Labels 25 sheets
Option Cassette 500sheets (75gr)
ITEM DESCRIPTION
Face Down(Top) tray 250 sheets
Face UP(Rear) tray 100 sheets

Summary of Product
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4. Summary of Product
This chapter describes the functions and operating principal of the main component.
4.1 Printer Components
4.1.1 Front View

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Summary of Product
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4.1.2 Rear View

Summary of Product
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4.1.3 Control Panel
The control panel on the top right side of your printer has the display and the nine buttons.
4.1.3.1 Display