■ Paper handling
: 500 sheets Standard cassette
: 500 sheets Optional cassette
: 50 sheets DADF
The keynote of Product
DIGITAL LASER MFP
SCX-5835NX_5935NX Series
■ 160GB HDD
■ High Performance CCDM
■ Easy to install ( CRU & Option )
■ Color Graphic Touch-Screen LCD (7”)
■ Low Cost per Page
■ Direct USB
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. June. 2010
Printed in Korea.
VERSION NO. : 1.00 CODE : 5835-N0000E
chapter 1Precautions
1.1 Safety Warning ……………………………………………………1-1
1.2 Caution for safety …………………………………………………1-2
1.3 ESD Precautions …………………………………………………1-5
1.4 Super Capacitor or Lithium Battery Precautions ………………1-5
chapter 2Product Overview
2.1 Product Overview …………………………………………………2-1
2.1.1 Product Summary ……………………………………………5-1
Contents
2.1.2 Specications …………………………………………………2-2
2.1.3 Model Comparison …………………………………………2-11
2.2 System Overview …………………………………………………2-14
2.2.1 System Conguration ………………………………………2-15
2.2.2 Hardware Conguration ……………………………………2-15
2.2.3 Mechanic Conguration ……………………………………2-22
chapter 3Disassembly and Reassembly
3.1 Disassembly and Reassemblyons on Disassembly …………3-1
3.2 Maintenance Parts ………………………………………………3-2
3.3 General Disassembly ……………………………………………3-3
3.3.1 Fuser Unit ……………………………………………………3-3
3.3.2 DADF Pick up unit and rubber pad ………………………3-3
3.3.3 Pick up roller …………………………………………………3-4
3.3.4 Transfer roller ………………………………………………3-4
3.3.5 Cover …………………………………………………………3-5
3.3.6 DADF Board …………………………………………………3-7
3.3.7 Scan Assy ……………………………………………………3-8
3.3.8 Middle Cover …………………………………………………3-10
3.3.9 HDD/ Main PBA/ Fax board ………………………………3-11
3.3.10 SMPS board ………………………………………………3-12
3.3.11 Main Drive unit ………………………………………………3-12
3.3.12 HVPS board …………………………………………………3-13
3.3.13 LSU Unit ……………………………………………………3-13
chapter 4Alignment and Troubleshooting
4.1 Alignment and Adjustments ………………………………………4-1
4.1.1 Paper path ……………………………………………………4-1
4.1.2 Clearing Paper Jams ………………………………………4-2
Contents
4.1.3 Abnormal Image Printing and Defective Roller ……………4-13
4.1.4 Control Panel overview ……………………………………4-15
4.1.5 Understanding The Status LED ……………………………4-18
4.1.6 Menu overview ………………………………………………4-19
4.1.7 Firmware Upgrade …………………………………………4-31
4.1.8 Diagnostics ……………………………………………………4-35
4.2 Troubleshooting……………………………………………………4-59
4.2.1 Procedure of Checking the Symptoms ……………………4-59
4.2.2 Error Message ………………………………………………4-60
4.2.3 Solution ………………………………………………………4-64
chapter 5System Diagram
5.1 Block Diagram ……………………………………………………5-1
5.2 Connection Diagram………………………………………………5-3
chapter 6Reference Information
6.1 Tool for Troubleshooting …………………………………………6-1
6.2 Acronyms and Abbreviations ……………………………………6-2
6.2.1 Acronyms ……………………………………………………6-2
6.2.2 Service Parts …………………………………………………6-4
6.3 The Sample Pattern for the Test …………………………………6-8
6.4 Selecting a location ………………………………………………6-9
attached Exploded Views & Parts List
Contents
Precautions
1. Precautions
In order to prevent accidents and damages to the equipment please read the precautions listed below
carefully before servicing the product and follow them closely.
1.1 Safety warning
(1) Only to be serviced by a factory trained service technician.
High voltages and lasers inside this product are dangerous. This product should only be serviced by a
factory trained service technician.
(2) Use only Samsung replacement parts.
There are no user serviceable parts inside the product. Do not make any unauthorized changes or
additions to the product as these could cause the product to malfunctions and create an electric shocks
or re hazards.
(3) Laser Safety Statement
The product is certied 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 certied 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 product 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 product with the protective cover removed from Laser/Scanner
assembly. The reected beam, although invisible, can damage your eyes.
When using this product, these basic safety pre-cautions should always be followed to reduce
risk of re, electric shock, and personal injury.
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Samsung Electronics
Precautions
Service Manual
1-2
Samsung Electronics
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 imaging unit and toner cartridge away from children. The toner powder contained in the
imaging unit and toner cartridge may be harmful, and if swallowed, you should contact a doctor.
1.2.2 Electric shock and re safety precautions
Failure to follow the following instructions could cause electric shock or potentially cause a re.
(1) Use only the correct voltage, failure to do so could damage the product and potentially cause a re or
electric shock.
(2) Use only the power cable supplied with the product. Use of an incorrectly specied cable could cause the
cable to overheat and potentially cause a re.
(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could
lead to a re, and/or cause your ceiling or lamp lights to icker.
(4) Do not allow water or other liquids to spill into the product, this can cause electric shock. Do not allow
paper clips, pins or other foreign objects to fall into the product, these could cause a short circuit leading
to an electric shock or re hazard.
(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock.
When servicing the product, remove the power plug from the wall socket.
(6) Use caution when inserting or removing the power connector. When removing the power connector, grip it
rmly and pull. The power connector must be inserted completely, otherwise a poor contact could cause
overheating possibly leading to a re.
(7) Take care of the power cable. Do not allow it to become twisted, bent sharply around corners or wise
damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat
and cause a re. Exposed cables could cause an electric shock. Replace the 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 re 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 lightning 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 product in a clean well ventilated location. Do not position the
machine near a humidier or in front of an air conditioner. Moisture and dust built up inside the machine
can lead to overheating and cause a re or cause parts to rust.
(11) Do not position the product in direct sunlight. This will cause the temperature inside the product to rise
possibly leading to the product failing to work properly and in extreme conditions could lead to a re.
(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
Service Manual
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Samsung Electronics
1.2.3 Handling precautions
The following instructions are for your own personal safety to avoid injury and so as not to damage the
product.
(1) Ensure the product is installed on a level surface, capable of supporting its weight. Failure to do so could
cause copy quality problems, and/or the product to tip or fall.
(2) The product contains many rollers, gears and fans. Take great care to ensure that you do not catch your
ngers, 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 product
which if spilled could get into the machine and cause damage or a shock or re hazard.
(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a
humidier or heater. Damage could be caused to the product in such areas.
(5) Do not place candles, burning cigarettes, etc on the product, These could cause a re.
1.2.4 Assembly / Disassembly precautions
Replace parts carefully and 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 product 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 main board or network card is replaced.
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.
(3) Disconnect 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-tting any parts do not use excessive force, especially when tting 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 uorescent or incandescent room
lighting. Exposure for as little as 5 minutes can damage the surface of the photoconductive properties
and will result in print quality degradation. Take extra care when servicing the product. 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.
Precautions
Service Manual
1-4
Samsung Electronics
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 nger 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
- When transporting/installing the equipment be sure to hold the positions as shown in the reference
chapter.
The equipment is quite heavy and weighs approximately 23.1Kg (including consumables), therefore pay
full attention when handling it.
- Be sure not to hold the movable parts or units (e.g. the control panel, DADF) when transporting the
equipment.
- Be sure to use a dedicated outlet with 110V/220Vpower input.
- The equipment must be grounded for safety.
- Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration and direct
sunlight.
- Provide proper ventilation since the equipment emits a slight amount of ozone.
- To insure adequate working space for the copying operation, keep a minimum clearance of 10cm (3.9”
on the left, 10 cm (3.9”) on the right and 10 cm (3.9”) on the rear.
- The equipment shall be installed near the socket outlet and shall be accessible.
- Be sure to x and plug in the power cable securely after the installation so that no one trips over it.
Precautions
Service Manual
1-5
Samsung Electronics
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 eld 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 classied as “anti-static”
can generate electrical charges sufcient to damage ESDs.
5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufcient 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 oor, can generate static
electricity sufcient to damage an ESD.
1.4 Super Capacitor or Lithium Battery Precautions
1. Exercise caution when replacing a super capacitor or Lithium battery. There could be a danger of explosion
and subsequent operator injury and/or equipment damage if incorrectly installed.
2. Be sure to replace the battery with the same or equivalent type recommended by the manufacturer.
3. Super capacitor or Lithium batteries contain toxic substances and should not be opened, crushed, or
burned for disposal.
4. Dispose of used batteries according to the manufacture? instructions.
Product spec and feature
2. Product spec and feature
2.1 Product Overview
2.1.1 Product Summary
Premium LMFP with High Reliability and Quality
Target user : 10 Persons N/W Small Workgroup
■ 33 ppm(A4) Network-ready MFP
■ Toner cartridge
: Initial : 4K / Sales : 4K,10K
■ Paper handling
: 500 sheets Standard cassette
: 500 sheets Optional cassette
: 50 sheets DADF
■ 160GB HDD
■ High Performance CCDM
■ Easy to install ( CRU & Option )
■ Color Graphic Touch-Screen LCD (7”)
■ Low Cost per Page
■ Direct USB
Service Manual
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Samsung Electronics
Product spec and feature
Service Manual
2-2
Samsung Electronics
2.1.2 Specications
• Product Specications are subject to change without notice. See below for product specications.
2.1.2.1 General Print Engine
ItemDescription
Engine SpeedSimplexUp to 33 ppm in A4 (35 ppm in Letter)
DuplexUp to 17 ipm in A4 (18 ipm in Letter)
FPOTFrom ReadyLess than 8.5 sec
From Power SaveLess than 25 sec
ResolutionOptical600 x 600 dpi
EnhancedAddressible 1200 dpi
Printer LanguagesPCL6, PostScript3, PDF 1.4, TIFF, EPSON/IBM Pro (Israel only)
SCX-5835NX_5935NX Series consist of Main Control Part, Operation Panel Part, Scanner Part, Line
Interface Part ,Power Part and Optional DIMM(Dual-In-Memory Module) for Scan-To-Email.
Main Controller is commonly applied in all products, SCX-5835NX_5935NX Series, and in case of necessary
a part of components or Module is selectively adopted in accordance with required feature of each model.
2.2.2 Hardware Conguration
Product spec and feature
Service Manual
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Samsung Electronics
4-1. Main Board
Scan MOTIC
CHORUS3(ASIC)
Flash Memory
USB IC
DDR2 DIMM
Network IC
4-1. Main Board
Scan MOTIC
CHORUS3(ASIC)
Flash Memory
USB IC
DDR2 DIMM
Network IC
2.2.2.1 Main Controller
The Main Control Part comprises 1 CPU and 1 B’D by adopting the dedicated Controller for Fax & LBP. The
Scanner Part comprises DADF& CCD and connected with Main board through Harness.
Product spec and feature
Service Manual
2-17
Samsung Electronics
CPU (CHORUS3)
It uses the ARM 926EJS, 32Bit RISC Processor, which is dedicated Controller for Printer & Fax function and
drives the each internal Operation Block by system program of Flash Memory and thereby controlling the
whole System.
- Main Function Block : Completely Integrated System for Embedded Applications,
▶ 32 Bit RISC Architecture, Efcient and Powerful ARM 926EJS Core.
▶ LSU Interface Module for Interfacing PVC or HPVC with LSU
▶ Dual Memory Bus Architecture
- Operation Frequency : AHB Bus: 133MHz, Internal System Bus: 120MHz
- Operation Power : 3.3V / 1.0V(core)
Flash Memory
It stores system program, Fonts data(PCL, PS/3), and can download the system program through PC
Interface or Network.
- Capacity: 32M Byte
- Access Time : 80 nsec
System Memory (DDR2)
It is used as Swatch Buffer for Printing, Scan Buffer for Scanning and System Working Memory Area.
- System memory: 256MB Capacity
- Max Frequency: 120 MHz
System Data Memory (EEPROM + Flash Memory)
This memory, which is for storing the operation variable & the setting parameter of Elbert2, keeps the
information.
Optional Memory (DIMM)
SCX-5835NX_5935NX Series provide one (1) Extension Slot for extending Memory. The RAM Extension
Slot can be used for:
General Memory Extension
256 MB Optional Memory is available.
Product spec and feature
Service Manual
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Samsung Electronics
Fuse 5V
Fuse 5V
Fuse 24V
Fuse 24V
Fuse 5V
Fuse 5V
Fuse 5V
Fuse 5V
Fuse 24V
Fuse 24V
Fuse 5V
Fuse 5V
2.2.2.2 SMPS board
SMPS( Switching Mode Power Supply ) Board supplies electric power to a Main Board and other boards
through a Main Controller by +5V,+24V from 110V/220V power input. It has safety protection modes for over
current and load.
Product spec and feature
Service Manual
2-19
Samsung Electronics
DC Output Connector( CON3 )
DescriptionPIN NOPIN ASSIGNPIN NODescription
Fuser ON
(Active High)
Fuser_On1224VS
Power
(Photo Triac Bias)
Power+24V34GND+24V Ground
Power+24V56GND+24V Ground
Power+24V78GND+24V Ground
Power+24V910GND+24V Ground
Power+5V1112GND+5V Ground
Power+5V1314GND+5V Ground
Relay OnRelay_On 1516OFF/SINK+24V On/OFF
AC Input Connector( CON1 )
SMPS → Heater Controller( CON2 )
PIN ASSIGNPIN NODescription
1AC_L
AC Input
2AC_N
PIN ASSIGNPIN NODescription
1AC_L
AC Output
for Heater
2AC_N
Product spec and feature
Service Manual
2-20
Samsung Electronics
2.2.2.3 HVPS board
HVPS(High Voltage Power Supply)
HVPS Part outputs the generated high voltage for THV/MHV/BIAS/DETACH/FUSER BIAS by inputting 24V,
and the output high voltage is provided into OPC Cartridge and Transfer Roller.
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