Samsung SCX 340x Series Service Manual. Www.s Manuals.com. Manual

User Manual: Multi-functional printer Samsung SCX-3405F, SCX-3405W, SCX-3405FW - Service manuals and Schematics, Disassembly / Assembly. Free.

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Mono Laser MFP
SCX-340x series
SCX-340x / 340xF / 340xW /
340xFW

SERVICE

MANUAL

Mono Laser MFP

Contents
1. Precautions
2. Product specification and description
3. Disassembly and Reassembly
4. Alignment and Troubleshooting
5. System Diagram
6. Reference Information

Refer to the service manual in the GSPN (see the rear cover) for more information.

Contents

Contents
1.

Precautions ...................................................................................................................................... 1 − 1
1.1.

Safety warning ........................................................................................................................ 1 − 1

1.2.

Caution for safety .................................................................................................................... 1 − 2

1.3.
2.

1.2.1.

Toxic material............................................................................................................. 1 − 2

1.2.2.

Electric shock and fire safety precautions ......................................................................... 1 − 2

1.2.3.

Handling precautions ................................................................................................... 1 − 3

1.2.4.

Assembly and Disassembly precautions ........................................................................... 1 − 3

1.2.5.

Disregarding this warning may cause bodily injury ............................................................ 1 − 4

ESD precautions ...................................................................................................................... 1 − 5

Product specification and description..................................................................................................... 2 − 1
2.1.

Product Specification................................................................................................................ 2 − 1
2.1.1.

Product Overview........................................................................................................ 2 − 1

2.1.2.

Specifications ............................................................................................................. 2 − 1
2.1.2.1.

General Print Engine...................................................................................... 2 − 1

2.1.2.2.

Copier......................................................................................................... 2 − 2

2.1.2.3.

Scan Specification ......................................................................................... 2 − 3

2.1.2.4.

Fax............................................................................................................. 2 − 4

2.1.2.5.

Controller and Software.................................................................................. 2 − 5

2.1.2.6.

Paper Handling ............................................................................................. 2 − 7

2.1.2.7.

Consumables ................................................................................................ 2 − 8

2.1.2.8.

Maintenance Part .......................................................................................... 2 − 8

2.1.2.9.

Reliability and Service ................................................................................... 2 − 8

2.1.2.10. Environment ................................................................................................ 2 − 9
2.1.2.11. Accessories .................................................................................................. 2 − 10
2.1.3.
2.2.

Model Comparison Table .............................................................................................. 2 − 11

System Overview..................................................................................................................... 2 − 12
2.2.1.

Front View ................................................................................................................. 2 − 12

2.2.2.

Rear View .................................................................................................................. 2 − 14

2.2.3.

Paper Path.................................................................................................................. 2 − 15

2.2.4.

System Layout ............................................................................................................ 2 − 16

2.2.5.

2.2.4.1.

Feeding Part ................................................................................................. 2 − 17

2.2.4.2.

Transfer Roller ............................................................................................. 2 − 18

2.2.4.3.

Drive Unit ................................................................................................... 2 − 18

2.2.4.4.

Fuser Unit.................................................................................................... 2 − 19

2.2.4.5.

LSU (Laser Scanner Unit)............................................................................... 2 − 21

2.2.4.6.

Toner Cartridge............................................................................................. 2 − 22

Hardware configuration ................................................................................................ 2 − 23
2.2.5.1.

Main board .................................................................................................. 2 − 25
Copyright© 1995-2011 SAMSUNG. All rights reserved.

Contents

2.2.6.

2.2.7.

2.2.5.2.

OPE board ................................................................................................... 2 − 28

2.2.5.3.

Fax board .................................................................................................... 2 − 30

2.2.5.4.

Wireless LAN board (wireless model only) ........................................................ 2 − 30

2.2.5.5.

SMPS/HVPS board ....................................................................................... 2 − 31

2.2.5.6.

Electrical Parts Location ................................................................................. 2 − 33

Engine F/W Contol Algorithm ....................................................................................... 2 − 35
2.2.6.1.

Feeding ....................................................................................................... 2 − 35

2.2.6.2.

Transfer....................................................................................................... 2 − 35

2.2.6.3.

Fusing......................................................................................................... 2 − 36

2.2.6.4.

LSU............................................................................................................ 2 − 36

Software Descriptions .................................................................................................. 2 − 37
2.2.7.1.

Software system overview .............................................................................. 2 − 37

2.2.7.2.

Architecture ................................................................................................. 2 − 37

2.2.7.3.

Data and Control Flow ................................................................................... 2 − 38

Disassembly and Reassembly .............................................................................................................. 3 − 1
3.1.

Precautions when replacing parts ................................................................................................ 3 − 1
3.1.1.

Precautions when assembling and disassembling ............................................................... 3 − 1

3.1.2.

Preautions when handling PBA ...................................................................................... 3 − 1

3.1.3.

Releasing Plastic Latches .............................................................................................. 3 − 2

3.2.

Screws used in the printer.......................................................................................................... 3 − 3

3.3.

Replacing the Main SVC parts ................................................................................................... 3 − 4
3.3.1.

Right and Left cover .................................................................................................... 3 − 4

3.3.2.

Scanner Unit............................................................................................................... 3 − 5

3.3.3.

ADF Unit................................................................................................................... 3 − 6

3.3.4.

CIS Unit .................................................................................................................... 3 − 7

3.3.5.

OPE Unit ................................................................................................................... 3 − 8

3.3.6.

Front Cover ................................................................................................................ 3 − 9

3.3.7.

Middle Cover ............................................................................................................. 3 − 10

3.3.8.

Rear Cover................................................................................................................. 3 − 11

3.3.9.

Main board................................................................................................................. 3 − 11

3.3.10. WLAN board.............................................................................................................. 3 − 12
3.3.11. Fax board................................................................................................................... 3 − 12
3.3.12. SMPS/HVPS board...................................................................................................... 3 − 13
3.3.13. Fuser Unit .................................................................................................................. 3 − 14
3.3.14. Drive Unit.................................................................................................................. 3 − 14
3.3.15. LSU.......................................................................................................................... 3 − 15
3.3.16. Feed Sensor PBA ........................................................................................................ 3 − 16
3.3.17. Pick up roller .............................................................................................................. 3 − 16
3.3.18. Motor........................................................................................................................ 3 − 17
3.3.19. Transfer roller............................................................................................................. 3 − 18
Copyright© 1995-2011 SAMSUNG. All rights reserved.

Contents

Alignment and Troubleshooting ........................................................................................................... 4 − 1
4.1.

Alignment and Adjustments....................................................................................................... 4 − 1
4.1.1.

Control Panel.............................................................................................................. 4 − 1

4.1.2.

Understanding the status LED........................................................................................ 4 − 5

4.1.3.

JAM removal.............................................................................................................. 4 − 7
Clearing original document jams ...................................................................... 4 − 7

4.1.3.2.

Clearing paper jams ....................................................................................... 4 − 9

4.1.4.

Useful menu item for service ......................................................................................... 4 − 12

4.1.5.

Periodic Defective Image .............................................................................................. 4 − 13

4.1.6.

Useful management tools .............................................................................................. 4 − 14

4.1.7.

4.1.8.

4.1.9.
4.2.

4.1.3.1.

4.1.6.1.

Using Samsung Easy Printer Manager (Windows and Macintosh only) .................... 4 − 14

4.1.6.2.

Using Samsung Printer Status (Windows only) ................................................... 4 − 16

4.1.6.3.

Using Smart Panel (Linux only) ....................................................................... 4 − 17

4.1.6.4.

Using SyncThru Web Service (SWS) ................................................................ 4 − 18

Updating Firmware ...................................................................................................... 4 − 20
4.1.7.1.

Update the firmware by using the USB port........................................................ 4 − 20

4.1.7.2.

Update the firmware by using the network.......................................................... 4 − 21

Tech Mode ................................................................................................................. 4 − 23
4.1.8.1.

Tech mode (4 in 1 model) ............................................................................... 4 − 23

4.1.8.2.

Tech Mode (3 in 1 model) ............................................................................... 4 − 27

EDC program (3 in 1 model only)................................................................................... 4 − 30

Troubleshooting ...................................................................................................................... 4 − 31
4.2.1.

Procedure of checking the symptoms............................................................................... 4 − 31
4.2.1.1.

iii

Basic Check List ........................................................................................... 4 − 32

4.2.2.

Error Code and Troubleshooting..................................................................................... 4 − 33

4.2.3.

Image quality problem.................................................................................................. 4 − 43

4.2.4.

Other errors ................................................................................................................ 4 − 49

System Diagram................................................................................................................................ 5 − 1
5.1.

Block Diagram (4 in 1) ............................................................................................................. 5 − 1

5.2.

Block Diagram (3 in 1) ............................................................................................................. 5 − 2

5.3.

Connection Diagram (4 in 1) ...................................................................................................... 5 − 3

5.4.

Connection Diagram (3 in 1) ...................................................................................................... 5 − 4

Reference Information........................................................................................................................ 6 − 1
6.1.

Tool for Troubleshooting ........................................................................................................... 6 − 1

6.2.

Glossary................................................................................................................................. 6 − 2

6.3.

The Sample Pattern for the Test .................................................................................................. 6 − 8

6.4.

Selecting a location .................................................................................................................. 6 − 9

1. 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 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 I(1) laser products, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC
60825-1. 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.
•

Wavelength: Max. 800 nm (785 -10/+15)

•

Beam divergence

•

Paraller: Max. 13 degrees (10 -4/+3)

Perpendicular: Max. 35 degrees (31 -6/+4)

Maximum power of energy output: 12 mW
WARNING

Never operate or service the product 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 personal injury.

1-1

1. Precautions

1.2. Caution for safety

1.2.1. Toxic material
This product contains toxic materials that could cause illness if ingested.
1) 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 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 product and potentially cause a fire or electric shock.
2) Use only the power cable supplied with the product. 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 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 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 product, remove the power plug from the wall socket.
6) Use caution when inserting or removing the power cord. When removing the power cord, grip it firmly and pull. The
power cord must be inserted completely, otherwise a poor contact could cause overheating leading to a fire.
7) Take care of the power cable. Do not allow it to become twisted, bent sharply around corners or power cable may be
damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and cause a
fire. 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 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 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
humidifier or in front of an air conditioner. Moisture and dust built up inside the machine can lead to overheating and
cause a fire 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 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.
13)

1-2

When replacing the SMPS board, please wait 5 minutes after unplugging the power cord, then replace it. You
can get a shock by the electric discharge.

1. Precautions

1.2.3. Handling precautions
The following instructions are for your own personal safety to avoid injury and so as not to damage the product.
1) Ensure the product is installed on a level surface, capable of supporting its weight. Failure to do so could cause
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 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 product 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 product in such areas.
5) Do not place candles, burning cigarettes, etc on the product, These could cause a fire.

1.2.4. Assembly and Disassembly precautions
1) 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.
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-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 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.

1-3

1. Precautions

1.2.5. Disregarding this warning may cause bodily injury
1) Be careful with the high temperature part.
The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser unit to
cool down before disassembly.
2) Do not put fingers 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, use safe lifting and handling techniques.
This printer is heavy. 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.
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.

1-4

1. 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.

1-5

2. Product specification and description

2. Product specification and description
2.1. Product Specification
2.1.1. Product Overview
1) Speed
•

Up to 20 ppm in A4 (21 ppm in Letter)

2) Printing Resolution
•

Up to 1,200 x 1,200 dpi effective output

3) Processor
•

433 MHz

4) Printer Language Emulation
•

SPL

5) Memory
•

SCX–340x/340xF/340xW : 64 MB

•

SCX-340xFW : 128 M

6) Interface
•

High speed USB 2.0

•

10/100 BaseTX network connector

•

802.11b/g/n wireless LAN (SCX-340xFW)

7) Toner cartridge
•

Initial : 0.7 K

•

Sales : 1.5K

2.1.2. Specifications
• Product Specifications are subject to change without notice.

2.1.2.1. General Print Engine
Item
Engine Speed
Warmup time
FPOT

2-1

Specification
Simplex

Up to 20 ppm in A4 (21 ppm in Letter)

Duplex

Manual Duplex

From Sleep

Less than 30 seconds

From Ready

Less than 8.5 seconds

From Sleep

Less than 15.5 seconds

2. Product specification and description

Item

Specification

Resolution

Up to 1,200 x 1,200 dpi effective output

2.1.2.2. Copier
Item

Specification

Copy Speed

Simplex to Simplex

Up to 20 ppm in A4 (21 ppm in Letter)

FCOT (B&W)

From Ready

Less than 14 seconds (from platen)

Text

Copy Resolution

Text/Photo

Photo

•

Scan: 300 x 300 dpi , Printing : 600 x 600 dpi @ ADF

•

Scan: 600 x 300 dpi , Printing : 600 x 600 dpi @ Platen

•

Scan: 300 x 300 dpi , Printing : 600 x 600 dpi @ ADF

•

Scan : 600 x 300 dpi , Printing : 600 x 600 dpi @ Platen

•

Scan: 600 x 300 dpi , Printing : 600 x 600 dpi @ ADF

•

Scan: 600 x 600 dpi , Printing : 600 x 600 dpi @ Platen

Original Type

Factory Default

Text/Photo

Max. Original
Size

Platen

ADF

Legal (8.5" x 14")

Multi Copy

1~99

Automatic Paper Selection

Manual Paper Selection

Duplex Copy

Darkness Control

11 Levels

Reduce & Enlarge

25% to 400%

Basic Copy

2-2

2. Product specification and description

2.1.2.3. Scan Specification
Item

Specification

Item

Specification

Scan Method

Color CIS

Compatibility

TWAIN, WIA

Scan Speed

Linearity, Halftone

15 sec on Platen, 15 sec on ADF @ 300dpi

Gray

23 sec on Platen, 26 sec on ADF @ 300dpi

Color

Resolution

4,800 x 4,800 dpi
256 levels

Max. Document Width

Max. 216 mm (8.5")

Effective Scan Width

Max. 208 mm (8.2")

Max. Document Length

Mono
Capacity

2-3

True Color 300 dpi : 70 sec on Platen, 70 sec on ADF

Enhanced

Color

ADF

•

1,200 x 1,200 dpi

Effective Scan Length

Scan Depth

256 Color 300 dpi : 65 sec on Platen, 70 sec on ADF

Optical

Halftone

Scan Size

•

Document Size

•

ADF : 356 mm (14") P

•

Platen : 297 mm (11.7")

•

ADF : 348 mm (13.7")

•

Platen : 289 mm (11.4")

Internal: 16 bit x 3, External : 8 bit x 3
•

1 bit for Lineart & Halftone

•

8 bits for Gray scale

40 sheets @ 75 gsm
•

Width : 142 ~ 216 mm

•

Length : 148 ~ 356 mm

2. Product specification and description

2.1.2.4. Fax
Item

Specification

Compatibility

ITU-T G3, ECM

Communication System

PSTN/PABX

Modem Speed

33.6 Kbps

TX Speed

Approx. 3 sec (Mono/Standard/ECM-MMR, @ ITU-T G3 No.1 )

Compression

MH/ MR/ MMR/ JBIG/ JPEG (Tx Only)

Color Fax

Yes (Tx only)

ECM

Yes

Resolution
(Mono)

Telephone
Features

Std

203 x 98 dpi

Fine

203 x 196 dpi

S.Fine

300 x 300 dpi

Handset

Yes (China Only)

On hook Dial

Yes

Yes (Phone Book)

Speed Dial

200 locations

Group Dial

100 Groups

TAD I/F

Yes

Tone/Pulse

Yes (Selectable in Tech Mode)

Pause

Yes

Auto Redial

Yes

Last Number Redial

Yes

Caller ID

Yes

External Phone Interface

Yes

2-4

2. Product specification and description

2.1.2.5. Controller and Software
Item

Specification

Processor

433 MHz

Memory

Std.
Memory expansion

•

SCX-340x/ 340xF/ 340xW : 64 MB

•

SCX-340xFW : 128 MB

N/A

Printer Languages

SPL

Fonts

Windows Fonts
Default Driver

SPL

Install

SPL
Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003 Server(32/64bits)/
2008 Server(32/64bits)/ 7(32/64bits)/ 2008 Server R2(64bits)
Linux

Supporting OS
Print Driver

•

RedHat Enterprise Linux WS 4, 5 (32/64 bit)

•

Fedora 4, 5, 6, 7, 8, 9, 10, 11, 12 (32/64 bit)

•

SuSE Linux 10.0, 10.1 (32 bit)

•

OpenSuSE 10.2, 10.3, 11.0, 11.1, 11.2 (32/64 bit)

•

Mandriva 2005, 2006, 2007, 2008, 2009, 2009.1 (32/64 bit)

•

Ubuntu 5.04, 5.10, 6.06, 6.10, 7.04, 7.10, 8.04, 8.10, 9.04,
9.10(32/64 bit)

•

SuSE Linux Enterprise Desktop 10, 11 (32/64 bit)

•

Debian 4.0, 5.0 (32/64 bit)

Mac OS X 10.4 ~ 10.7
WHQL

Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003 Server(32/64bits)/
2008 Server(32/64bits)/ 7(32/64bits)/ 2008 Server R2(64bits)

Compatibility

Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003 Server(32/64bits)/
2008 Server(32/64bits)/ 7(32/64bits)/ 2008 Server R2(64bits)

TWAIN

Yes

WIA

Yes

ICDM

Yes
Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003 Server(32/64bits)/
2008 Server(32/64bits)/ 7(32/64bits)/ 2008 Server R2(64bits)
Linux

Scan Driver
Supporting OS

•

RedHat Enterprise Linux WS 4, 5 (32/64 bit)

•

Fedora 4, 5, 6, 7, 8, 9, 10, 11, 12 (32/64 bit)

•

SuSE Linux 10.0, 10.1 (32 bit)

•

OpenSuSE 10.2, 10.3, 11.0, 11.1, 11.2 (32/64 bit)

•

Mandriva 2005, 2006, 2007, 2008, 2009, 2009.1 (32/64 bit)

•

Ubuntu 5.04, 5.10, 6.06, 6.10, 7.04, 7.10, 8.04, 8.10, 9.04,
9.10(32/64 bit)

•

SuSE Linux Enterprise Desktop 10, 11 (32/64 bit)

•

Debian 4.0, 5.0 (32/64 bit)

Mac OS X 10.4 ~ 10.7

2-5

2. Product specification and description

Item

Specification
Protocol

TCP/IPv4/IPv6, HTTP, SNMPv1/v2c/v3, DNS/WINS, DDNS, DHCP,
BOOTP, AutoIP, Standard TCP/IP printing, LPR, IPP, UPnP(SSDP),
Bonjour, WSD, SLP, SetIP
[Windows]
•

Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003
Server(32/64bits)/ 2008 Server(32/64bits)/ 7(32/64bits)/ 2008
Server R2(64bits)

[Mac]
•

Wired Network

Mac OS 10.4~10.7

[Linux]
Supporting OS

•

RedHat 8 ~ 9(32bit)/ Enterprise Linux WS 4, 5 (32/64bit)

•

Fedora Core 1 ~ 7 (32/64bit)

•

SuSE 8.2 ~ 10.2/Enterprise Desktop 9~10 (32/64bit)

•

Madrake 9.2 ~ 10.1 (32/64bit)

•

Mandriva 2005 ~ 2007

•

Ubuntu 6.06 ~ 7.04

•

Debian 3.1 ~ 4.0

Wireless Network

Protocol

802.11 b/g/n

(SCX–340xW/ FW
only)

Supporting OS

Same as wired network

Samsung Easy Printer
Manager

For Windows and Macintosh

Application

Smart Panel
Network Management

Interface

For Linux
SyncThru Web Service 2.0

Parallel

N/A

USB

High speed USB 2.0

2-6

2. Product specification and description

2.1.2.6. Paper Handling

Item

Specification

Standard Capacity

150-sheet Multi Purpose Tray @ 80 g/m²

Max. Capacity

150-sheet @ 80 g/m²

Printing

Max. Size

216 x 356 mm (8.5" x 14.02")

Min. Size

76 x 183 mm (3.0" x 7.2")

Standard Cassette Tray

N/A
Capacity

Multi-purpose Tray
(Bin type)

Plain Paper : 150 sheets @ 80 g/m²

•

Envelop : 1 sheet @ 80 g/m²

Media sizes

A4, A5, Letter, Legal, Executive, Folio, Oficio, ISO B5, JIS B5,
Envelope(Monarch, No.10, DL, C5), Custom

Media type

Plain ,Thin, Cotton, Recycled, Archive, Colored, Pre-Printed, Label, Bond,
Thick, Envelopes, Cardstock

Media weight

16~43 lb (60 to 163 g/m²)

Sensing

N/A

Optional Cassette Tray
Output Stacking

•

N/A
Capacity

•

Output Full sensing

N/A

Duplex

Supporting

N/A

Printable Area

Non-Printable Area

2-7

•

Face-Down : 100 sheets @ 80 g/m²

3 mm (0.12") from edge (Top, Bottom, Left, Right)

2. Product specification and description

2.1.2.7. Consumables
Item

Specification

Toner Cartridge

Part name

MLT-D101S

Average yield

•

Average Cartridge Yield 1,500 standard pages
(Ships with 700 pages Starter Toner Cartridge)
NOTE

Declared yield value in accordance with ISO/IEC 19752.

NOTE
Depending on the options, percentage of image area, and job mode used, the toner cartridge’s lifespan may differ.

2.1.2.8. Maintenance Part
Item
Fuser Unit

Part Code

Life

•

JC91–01075A (220V)

•

JC91–01074A (110V)

30,000 Pages

Transfer Roller

JC66–02709A

30,000 Pages

Pick-Up Roller Assy

JC93–00525A

30,000 Pages

Friction Pad

JC93–00522A

30,000 Pages

ADF Feed roller

JC97-03959A (ADF Unit)

20,000 Pages

ADF Rubber pad

JC97-03959A (ADF Unit)

20,000 Pages

2.1.2.9. Reliability and Service
Items

Specification

Printing Volume (SET AMPV)

75 sheets/month

MPBF

20,000 sheets

MTTR

30 min.

SET Life Cycle

30,000 sheets or 5 years (whichever comes first)

2-8

2. Product specification and description

2.1.2.10. Environment
Item

Dimension (W x D x H)

Weight

Noise Level *

Specification

Machine

•

SCX-340x/ 340xW : 389 x 274 x 249 mm (15.3 x 10.8
x 9.8 inches)

•

SCX-340xF/ 340xFW : 402 x 293 x 296 mm (15.8 x
11.5 x 11.7 inches)

•

SCX-340xFH : 407 x 293 x 296 mm (16.0 x 11.5 x
11.7 inches)

•

SCX-340x /340xW : 6.65 Kg (14.66 lbs)

Machine with consumables

•

SCX-340xF /340xFW/ 340xFH/ 340xHW : 8.0 Kg
(17.64 lbs)

Ready mode

Less than 26 dB (A)

Print mode

Less than 50 dB (A)

Copy mode

Scan mode

•

Scanner glass : Less than 52 dB (A)

•

Document feeder : Less than 51 dB (A)

•

Scanner glass : Less than 52 dB (A)

•

Document feeder : Less than 53 dB (A)

Temperature

Operation

10 ~ 32 °C (50 ~ 90 °F)

Humidity

Operation

20 ~ 80% RH

110 volt models

AC 110 - 127 V

220 volt models

AC 220 - 240 V

Average operating mode

Less than 230 W

Ready mode

Less than 35 W

Power save mode

Less than 1.0 W

Power off mode

Less than 0.45 W (0.1 W ***)

Power rating **

Power Consumption

* Sound Pressure Level, ISO 7779. Configuration tested: basic machine installation, A4 paper, simplex printing.
** See the rating label on the machine for the correct voltage (V), frequency (hertz) and type of current (A) for your machine.
*** For the machine that has a power switch.

2-9

2. Product specification and description

2.1.2.11. Accessories
Image

Item

Remark

Power cord

Quick installation guide

Software CD

The software CD contains the printer drivers and software
applications.

Misc. accessories

Miscellaneous accessories included with your machine may
vary by country of purchase and specific model.

Handset

Handset model only

2-10

2. Product specification and description

2.1.3. Model Comparison Table
Samsung

Samsung

SCX-3405FW

SCX-3205W

M1212nf

20 ppm

16 ppm

18 ppm

less than 8.5 sec

Processor

433 MHz

375 MHz

400 MHz

Memory

64 MB

128 MB

64 MB

Emulation

GDI

GDI, PCL5e

GDI

Input

150 Bin

150 CST

150 Bin

Output

100 sheet

50 sheet

100 sheet

ADF

40 sheet

N/A

35 sheet

Noise

50 dBA

49 dBA

51 dBA

Toner Cartridge

1.5K (0.7K)

1.6K (0.7K)

Image

Speed (A4)
FPOT
(from ready)

Paper
Capacity

2-11

2. Product specification and description

2.2. System Overview
This chapter describes the functions and operating principal of the main component.

2.2.1. Front View
NOTE
•

This illustration may differ from your machine depending on your model. There are various types of machine.

•

Some features and optional goods may not be available depending on model or country.

Type A
1

6
5
4
2
10
9
3

Scanner lid

Scanner glass

Control panel

Scan unit

Tray

Inner cover

Tray handle

Toner cartridge

Output support

Output tray

2-12

2. Product specification and description

Type B
1

3
4
10
9
8
5
6

13 14

17
18

Document feeder cover

Scanner lid

Document feeder guide cover

Scanner glass

Document feeder output tray

Paper width guide on a document feeder

Document feeder output support

Document feeder input support

Control panel

Document feeder input tray

Handle

Handset*

Tray

Scan unit

Tray handle

Inner cover

Output support

Toner cartridge

Output tray

* Handset model (SCX-340xFH) only

2-13

2. Product specification and description

2.2.2. Rear View
NOTE
•

This illustration may differ from your machine depending on your model. There are various types of machine.

•

Some features and optional goods may not be available depending on model or country.

Type A

USB port

Power receptacle

Type B

1
2

3
4
5

USB port

Telephone line socket
(Line)

Network port

Power receptacle

Extension telephone
socket (EXT)

2-14

2. Product specification and description

2.2.3. Paper Path
The following diagram displays the path the paper follows during the printing process.

[ADF]

[Engine]

2-15

2. Product specification and description

2.2.4. System Layout
This model consists of the scanner parts, engine parts, hardware parts, firmware. The scanner parts consists of ADF and
platen. The engine parts consists of the mechanical parts comprising Frame, Toner Cartridge, Drive Unit, Transfer roller,
Pick up unit, Fuser, Bin-tray. The hardware parts consists of the main board, SMPS/HVPS board, OPE board, PC interface.

LSU

Toner cartridge

Plate-Bottom

Fuser unit

Pick up roller

Exit roller1

Feed roller

ADF

Transfer roller

2-16

2. Product specification and description

2.2.4.1. Feeding Part
It is consists of a bin-type tray, pick-up roller, friction pad and parts related to paper feed initialization.

1) Input Tray
This model has a bin-type tray.
It takes a center loading method and applies ‘friction pad separating method.’
The side guide can be adjusted for various types of papers from A6 to legal size paper. It has a paper detecting function,
paper arranging function.

2) Pick-up roller
It has functions such as a paper pickup function, driving control function, paper feeding function, and removing electronic
static function. Pick up roller is driven by clutch.

2-17

2. Product specification and description

2.2.4.2. Transfer Roller
The transfer roller delivers the toner of the OPC drum to the paper.

• Life Span : Print over 30,000 sheets (in 15~30°C)

2.2.4.3. Drive Unit
In SCX-340x series, the driving device consists of OPC, Pick- up, Feed, Fuser, Gear- Train connected with Mounting
member. A step motor for driving is assembled to the left frame.

• Driving Frequency: Step Motor 810 PPS (1013 rpm)
• It is a power delivery unit by gearing: Step Motor → Pick-up/ Feeder/ OPC/ Fuser/ Exit

2-18

2. Product specification and description

2.2.4.4. Fuser Unit
This unit consists of Heat Roller, a Thermostat, and Thermistor, etc. It fuses the toner that was transferred by the transfer
roller onto the paper, by applying heat and pressure to complete fusing process.

1) Thermostat
When a heat lamp is overheated, a Thermostat cuts off the main power to prevent over- heating.
•

Thermostat Type : Non- Contact type Thermostat

•

Control Temperature : 195°C ± 5°C

2) Thermistor
It is a temperature detecting sensor.
•

Temperature Resistance : 7 kΩ(180°C)

3) Heat roller
The heat roller transfers the heat from the lamp to apply a heat on the paper.
The surface of a heat roller is coated with Teflon, so toner does not stick to the surface.
4) Pressure roller
A pressure roller mounted under a heat roller is made of a silicon resin, and the surface also is coated with Teflon. When a
paper passes between a heat roller and a pressure roller, toner adheres to the surface of a paper and is permanently fused.
5) Halogen Lamp

2-19

•

Voltage : 120 V (115 ± 5 %) / 220 V : 230 ± 5 %

•

Capacity : 850 Watt ± 25 W

2. Product specification and description

6) Items for safety
•

•

Protecting device for overheating
-

1st protection device: Hardware cuts off when overheated

2nd protection device: Software cuts off when overheated

3rd protection device: Thermostat cuts off main power.

Safety device
-

A fuser power is cut off when a front cover is opened.

Maintain a temperature of fuser cover’s surface under 80°C for user, and attach a caution label at where
customer can see easily when customer open a rear cover.

2-20

2. Product specification and description

2.2.4.5. LSU (Laser Scanner Unit)
It is the core part of the LBP ( Laser Beam Printer ) which switches from the video data received to the controller to the
electrostatic latent image on the OPC drum by controlling laser beam, exposing OPC drum, and turning principle of polygon
mirror. The OPC drum is turned with the paper feeding speed. The HSYNC signal is created when the laser beam from LSU
reaches the end of the polygon mirror, and the signal is sent to the controller. The controller detects the HSYNC signal to
adjust the vertical line of the image on paper. In other words, after the HSYNC signal is detected, the image data is sent to
the LSU to adjust the left margin on paper. The one side of the polygon mirror is one line for scanning.

2-21

2. Product specification and description

2.2.4.6. Toner Cartridge
By using the electronic photo process, it creates a visual image. In the toner cartridge, the OPC unit and the developing
unit are in a body. The OPC unit has OPC drum and charging roller, and the developing unit has toner, supply roller,
developing roller, and blade.

• Developing Method : Non magnetic single component non-contacting method
• Toner : Non magnetic single component pulverized type toner
• The life span of toner (ISO 19752 pattern / A4 standard)
- Initial toner : 0.7 K
- Sales toner : 1.5K
• OPC Cleaning : Collect the toner by using cleaning blade
• Handling of wasted toner : Collect the wasted toner in the cleaning frame by using cleaning blade
• Classifying device for toner cartridge: ID is classified by CRUM

2-22

2. Product specification and description

2.2.5. Hardware configuration
The SCX-340x series Electrical Circuit System consists of the following:

• Main board (System board)
• OPE board
• HVPS/SMPS board
• Wireless board (Only SCX-340xW,FW)
• Fax board
Diagram of the SCX-340x series Electrical Circuit
S P E AKE R

Ha n d s e t
(3 4 2 1 F H / 7 6 0 P O n ly)

2 Lin e LC D

LS U

F AX

O P E MIC O M
S TM8 S 1 0 3

No t Ue s d S F -7 6 0 P
ADF
MO TO R

MAIN
C o n t ro lle r

S MPS & HVP S
TO P C o ve r
Mic ro S witc h

16P

30P
12P

MO DE M
C O NE XE NT

3 .3 V

+2 4 V

ADF MO TO R DR IVE R
A4 9 8 4 S LP TR

DDR 2 S DR AM

2 4 VS
3 .3 V

NT5 TU3 2 M1 6 C G -3 C

(F W: 1 2 8 MB)
(F / 7 6 0 P : 6 4 MB)
AF E
LAF E 1 0 0 1

24V
S E R IAL F la s h
(O S )
W2 5 Q 6 4
8 MB
DE V

F US E R C o n tro l
R e la y C o n tro l
HVP S C o n tro l

MHV
S u p p ly

INLET

F US E R
C O NTR O L
THV

12P

C h o ru s 3 _ Ne xt
C o re : 4 3 3 MHz
S YS TE M : 1 5 0 MHz
DDR : 3 0 0 MHz
AR M1 1 7 6

D
DR UM

ADF _ P _ DE T
ADF _ P _ P O S

3
2
1

12
11
10
9
8
7
6
5
4
3
2
1

4
3
2
1

2 5 MHz

S C X-3 4 2 1 F W O n ly

S E R IAL F la s h
(F AX B/U)
W2 5 Q 6 4
8 MB

ADF _ C _ S E NS

C IS M

S C AN MO TO R DR IVE R
A4 9 8 4 S LP TR

EEP ROM
M2 4 5 1 2 X 1 E A
6 4 KB

OP C

1
2
3
4
5
6
7
8
9
10
11
12

M
T
S TE P

S CAN
HOME

OP E

M
T
S TE P

NE TWO R K
AC 2 0 1 A1 KMLG

US B
C LK

C
R
U
M

US B De vic e

E n g in e MO TO R DR IVE R
A4 9 8 4 S LP TR

MC LK

C lo c k G e n e ra to r
AS M3 P 2 8 6 3 A

MC LK

T
DE VE LO P E R Un it

THE R MIS TO R
4P

11P

3P
Th e rm is to r 1

1
2
3
4
5
6
7
8
9
10
11

5
4
3
2
1

1
2
3
4

Th e rm o S ta t

F US E R Un it

S OL

Wi-F i
S C X-3 4 2 1 F W O n ly

S TE P

P ic kUp
C lu tc h

Ma in
Mo to r

Fe e d
S e ns or

Wid th
S e ns or

SCX-340x series has a system board of integrated engine controller and video controller.
The engine controller controls all modules required to print, that is, LSU, HVPS/SMPS, Fuser, Motor etc. It communicates
with the video control block inside CPU for printing. And it has the interface for all video sync signal to print out
the video data.
The video controller receives print data from the host through network or USB Port. It takes this information and generates
printable video bitmap data.
The main board is adopted 433 MHz C3N CPU that is integrated with engine controller, video controller, SDRAM, Flash
ROM. It uses SDRAM and Flash ROM inside the ASIC chip.

2-23

2. Product specification and description

Circuit board locations
The following diagrams show the locations of the printer circuit boards:

2-24

2. Product specification and description

2.2.5.1. Main board
Chorus3–Next(C3N) chip is adopted as the main processor. Its process speed is 433 MHz. It is integrated engine controller,
video controller, scan controller.
DDR2 128MB is adopted for high speed data processing. Boot has 8 MB SPI + 8 MB SPI.
USB is the embedded type and wired network supports 100M full duplex.

[Main board diagram]

2-25

2. Product specification and description

[Main board image — SCX-340x, 340xW]

• Connection
1

LSU connector

CRUM connector

OPE connector

Engine Motor connector

SMPS/HVPS interface connector

Wireless module interface connector =>
Wireless model only

Sensor connector

Pick up connector

USB device connector

Fuser thermistor interface connector

Scan motor connector

Scan home sensor connector

CIS interface connector

• Information
- Part code : JC92–02433A~G (SCX-340x) / JC92–02444A~G (SCX-340xW)
- Part name : PBA-MAN

2-26

2. Product specification and description

[Main board image — SCX-340xF, 340xFW]

• Connection
1

LSU connector

CRUM connector

OPE connector

Engine Motor connector

SMPS/HVPS interface connector

Wireless module interface connector =>
Wireless model only

Fax board interface connector

Sensor connector

Pick up connector

Wired network connector => Wireless model
only

USB device connector

Fuser thermistor interface connector

Scan motor connector

ADF Module interface connector

Scan home sensor connector

CIS interface connector

• Information
- Part code : JC92–02434A (SCX-340xF) / JC92–02434B (SCX-340xFW)
- Part name : PBA-MAN

2-27

2. Product specification and description

2.2.5.2. OPE board
SCX-340x & SCX-340xW
The OPE Controller is composed of an OPE MICOM(PT6961), Satus LED, IC Copy LED, Scan To LED, ECO LED, WPS
LED. OPE communicates with main controller via UART. The power LED is controlled by the main board.

• OPE board diagram

• OPE board image

• Information
- Part code : JC92–02415A
- Part name : PBA-OPE
• Connection
1

Interface connector to main board

2-28

2. Product specification and description

SCX-340xF & SCX-340xFW
The OPE Controller is composed of an OPE MICOM(STM8SP103K3MAFTR), Satus LED, Mode LED, Animation
LED, Power LED, WPS LED, 16x2 Line LCD. OPE communicates with main controller via UART. The power LED
is controlled by the main board.

• OPE board diagram

• OPE board image

• Information
- Part code : JC92–02404A
- Part name : PBA-OPE
• Connection
1

2-29

Interface connector to main board

2. Product specification and description

2.2.5.3. Fax board
Fax controller (FCON) controls the fax sending and receiving. The Connexant DAA (Data Access Arrangement) solution is
applied to this board. It consists of three chip solutions : CX82500(SFM336), CX20493(LSD), CX20437(Codec)

• Information
- Part Code : JC92–01746D/E
- Part Name : PBA-LIU
• Connection
1

Interface connector to main controller

Speaker interface

2.2.5.4. Wireless LAN board (wireless model only)
The Wireless LAN Module supports 802.11b/g/n. It communicates with video controller via SPI.

[WLAN board image]

• Information
- Part Code : JC92–02402A
- PBA name : PBA-WNPC
• Connection
1

Interface connector to main board
(JC39-01565A , FFC CABLE-WLAN)

2-30

2. Product specification and description

2.2.5.5. SMPS/HVPS board
SCX-340x series has a power board of integrated SMPS and HVPS.
The SMPS (Switching Mode Power Supply) Board supplies electric power to the Main Board and other boards through a
Main Controller. The voltage provided includes +24V from a 110V/220V power input.
The HVPS board generates high-voltage channels which includes MHV, DEV DC, DEV AC, SUPPLY, THV.

[SMPS/HVPS board image]

• Specification
- General Input / Output Voltage
- AC 110V (110V ~ 127V)
- AC 220V (220V ~ 240V)
- Input Current : 8.0A (110V) / 6.3A (220V)
- Output Power: 43.2W
▪ DC 24V : 43.2W
• Information
110V

220V

Part Code

JC44–00208A

JC44–00209A

PBA name

SMPS/HVPS V1

SMPS/HVPS V2

• Connection

2-31

Main Board interface connector

AC_Inlet

COVER OPEN/CLOSE Switch

FUSER_AC Output

2. Product specification and description

• Input / Output connector
AC Output Connector( CN1 )
Pin Assign

Pin No.

AC_L

AC_N

Description
AC Output for Heater Controller

DC Output Connector (CN2)
PIN NO

PIN ASSIGN

Description

THV_READ

HVPS

PWM_MHV

HVPS

nTHV_EN

HVPS

PWM_DEV_DC

HVPS

+3.3V OPEN

COVER ON, OFF DETECT

PWM_DEV_AC

HVPS

+3.3V

COVER ON, OFF DETECT

nDEV_EN

HVPS

PWM_THV

HVPS

VPP_DEV_AC

HVPS

GND

Common Ground

+24VS1

Relay, Fuser

GND

Common Ground

GND

Common Ground

+24V

SMPS

RELAY_ON

AC RELAY ON (ACTIVE HIGH)

+24V

SMPS

GND

Common Ground

+24V

SMPS

FUSER_ON

FUSER_ON (ACTIVE HIGH)

2-32

2. Product specification and description

2.2.5.6. Electrical Parts Location
1) Sensors

No.

Description

Controller

Function

Photo interrupter (ADF Cover Open sensor)

ADF board

Cover open detection

Photo interrupter (Home Position sensor)

Main board

CIS detection

Switch Front Cover

SMP/HVPS board

Cover open detection

Photo interrupter (width Sensor)

Main board

Paper detection

Photo interrupter (Feed Sensor)

Main board

Paper detection

2-33

2. Product specification and description

2) Motor, Clutch

No.

Description

ADF motor

Scan motor

Main motor

Pick up Clutch

2-34

2. Product specification and description

2.2.6. Engine F/W Contol Algorithm
2.2.6.1. Feeding
If feeding from a tray, the drive of the pickup roller is controlled by controlling the clutch. The on/off of the clutch is
controlled by controlling the general output port or the external output port. While paper moves, occurrence of Jam
is judged as below.
Item

Description

JAM 0

•

After picking up, paper does not reach the Feed Sensor within a predetermined time.

•

After picking up, if the feed sensor is not on, re-pick up will be initiated. After re-picking up, if the
feed sensor is not on after certain time, it is JAM 0

•

Even though the paper reaches to the feed sensor, the feed sensor does not detect the lead edge of
the paper.

•

After the leading edge of the paper passes the feed sensor, the trailing edge of the paper does not clear
the sensor the feed sensor after predetermined period of time.

Paper Empty

JAM 1

2.2.6.2. Transfer
The charging voltage, developing voltage and the transfer voltage are controlled by PWM (Pulse Width Modulation). The
each output voltage is changeable due to the PWM duty. The transfer voltage admitted when the paper passes the transfer
roller is decided by environment conditions. The resistance value of the transfer roller is changed due to the surrounding
environment or the environment of the set, and the voltage value, which changes due to the environment, is changed through
the AD converter. The voltage value for impressing to the transfer roller is decided by the changed value.

2-35

2. Product specification and description

2.2.6.3. Fusing
The temperature change of the heat roller’s surface is changed to the resistance value through the use of a thermistor. The
Main Board uses the resistance value of the Thermistor and converts it to a voltage value through the use of an AD
converter, the temperature is decided based on the voltage value read. The AC power is controlled by comparing the target
temperature to the value from the thermistor. If the value from the thermistor is out of controlling range while controlling
the fusing, the error stated in the below table occurs.

• Open Heat Error
When the engine operates the warm-up process, if the temperature of the fixing unit is not higher than a specified
temperature within a predetermined time, the engine defines Open Heat Error. When this error is detected, the engine
stops all functions and keeps the error state. Also, the engine informs the error status of the main system, so it can take
appropriate action; and then the error message is displayed at LCD window or LED informing the error status of the user.

• Low Heat Error
When the engine is at stand-by, printing or warm-up mode, if the temperature of the fixing unit is lower than the
specified temperature at each state and the lower temperature state is maintained during the specified time, the engine
defines Low Heat Error. When this error is detected, the engine stops all functions and keeps it at the error state. Also,
the engine informs the error status of the main system, so it can take appropriate action; and then the error message
is displayed at LCD window or LED informing the error status of the user.

• Over Heat Error
For overall engine state, if the temperature of the fixing unit is higher than the specified temperature and the temperature
state is detected for a specific duration, then the engine defines Over Heat Error. When this error is detected, the engine
stops all functions and keeps it at the error state. Also, the engine informs the error status of the main system, so it
can take appropriate action; and then the error message is displayed at LCD window or LED informing the error
status of the user.

2.2.6.4. LSU
LSU receives the image data from PVC or HPVC and make the latent image on OPC surface. It uses the single beam,
LD. The errors related to LSU are as follows:

• By Lready
When the printing is started, the engine drives the polygon motor of LSU. After the specified time is elapsed, if the
motor is not in a ready status, the engine detects the error that the polygon motor is not in a ready status. If this error
happens, the engine stops all functions and keeps it at the error state. Also, the engine informs the error status of the
main system and the error message is displayed at LCD window or LED informing the error status of the user.

• By Hsync
When the polygon motor is ready, the LSU sends out the signal called Hsync and used to synchronize with each image
line. So, if the engine does not detect consecutively the signal for a fixed time, it defines the Hsync Error. If this error
happens, the engine stops all functions and keeps it at the error state. Also, the engine informs the error status of the
main system and then the error message is displayed at LCD window or LED informing the error status of the user. LSU
Error Recovery: If the LReady or Hsync error happens, the paper is exited before the error code is initiated. The engine
mode is changed to recovery mode and the engine informs the main system of the engine mode. The engine rechecks
the LSU error, if the error does not reoccur printing is resumed.

2-36

2. Product specification and description

2.2.7. Software Descriptions

2.2.7.1. Software system overview
The software system of this model is constructed with

• Host Software part that the application software operated in Window and Web Environment
• Firmware parts that is a Embedded software controls printing job.

2.2.7.2. Architecture

P rin ter /MFP

HOS T
S o ftware

Driver

Web -b as ed
Ap p licatio n

Firm ware

S tan d -alo n e
Ap p licatio n

Ap p licatio n
(Em u latio n )

Kern el

Host Software is made up of
1) Graphic User Interface offers the various editing functions to user in Host.
2) Driver translates the received document to a Printing Command language which printer can understand and transfers
data to spooler.
3) Stand-alone Application offers the various printing application such as Easy Printer Manager, Printer Status in Window
system.
4) Web-based-Application offers the same functions as Stand-alone Application in Web environment.

Firmware is made up of
1) Application (Emulation) that is a interpreter translates data received from Host to a printing language (PCL, PS, GDI,
etc.) to be able to make the user to take same output as originally one what composed in Host.
2) Kernel controls and manage the whole procedure including Control flow and Printing Job before transferring to Engine
system.

2-37

2. Product specification and description

2.2.7.3. Data and Control Flow
Ho s t

Firmwa re

US B
Driver
- P CL3, P S 3

Web-b as ed
- Do cument Manag ement

Q
p
s
u

KERNEL

S ys tem
- Netwo rk Ad minis tratio n
- S tatus Mo nito r
- Remo te Co ntro l P anel

S tan d-alo n e
- P rinter S etting Utility

En g in e

N
p
o
j
u
p
s

- Netwo rk Ad minis tratio n

Netwo rk
In terface
Ap p licatio n

Ap p licatio n
(Em u latio n )
- P CL
- PS3

- S tatus Mo nito r

The above Block Diagram is explained that:

Host Side is made up of
1) Driver that is Windows application software translate printed data to one of printer language and create spooler file.
2) Web-based Application that offer a various printer additional functions, management of printing job, printer
administration, Status monitor to monitoring the printer status by real time in Web, independent environment on OS.
3) Stand-alone Application that is a similar Window software as same as above 2.
4) Port Monitor that manages the network communication between spooler and Network Interface Card, or various
additional application and Network Interface Card,(this is, at first, make communication logical port, manage the data,
transfer them from spooler to network port, and offer the result of printing).

Firmware Side is made up of
1) Network Interface Card is that relay the communication between Host and kernel using various network protocol.
2) Kernel is that manages the flow control of emulation procedure, receiving data from Host or Network card and printing
with engine & rendering job.

2-38

2. Product specification and description

3) Emulation is that interprets the various output data from selected emulation.
4) Engine is that prints rendered bit-map data to paper with required size and type by Kernel.
And then, for Job Spooling function for Multi-User, Multi-Printing that is occurred in Network printing and various
additional printing functions, this Kernel use max. 10 Queuing systems in a memory.

In Printing, the two procedures are
1) Case of using USB Port
•

After user start to print the wanted document to PCL string or compressed GDI bit-map data, the Driver translates
the all graphic data of the client PC and send data to host spooler. And then the spooler sends the data stream to
the printer via USB port.

•

Kernel receives this data from Host, and then select emulation fit to data and start selected one. After emulation job
end, Kernel sends the output bit-map data to Engine using Printer Video Controller (by clock type for LSU).

•

Engine print the received data to required paper with the sequential developing process.

2) Case of using Network Interface Card

2-39

•

After user start to print the wanted document to PCL string or compressed GDI bit-map data, Driver translate the
all graphic data of it and send data to host spooler.

•

If so, Port monitor managing network port receives data from spooler and sends a data stream to the Network
Interface Card.

•

Network interface card receives it and send to Kernel part.

•

Engine print the received data to required paper with the sequential developing process.

3. Disassembly and Reassembly

3. Disassembly and Reassembly
3.1. Precautions when replacing parts
3.1.1. Precautions when assembling and disassembling
• Use only approved Samsung spare parts. Ensure that part number, product name, any voltage, current or temperature
rating are correct. Failure to do so could result in damage to the machine, circuit overload, fire or electric shock.

• 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.

• Take care when dismantling the unit to note where each screw goes. There are 19 different screws. Use of the wrong
screw could lead to system failure, short circuit or electric shock.

• Do not disassemble the LSU unit. Once it is disassembled dust is admitted to the mirror chamber and will seriously
degrade print quality. There are no serviceable parts inside.

• Regularly check the condition of the power cord, plug and socket. Bad contacts could lead to overheating and firfe.
Damaged cables could lead to electric shock or unit malfunction.

3.1.2. Preautions when handling PBA
Static electricity can damage a PBA, always used approved anti-static precautions when handling or storing a PBA.

• Precautions when moving and storing PBA
1) Please keep PBA in a conductive case, anti-static bag, or wrapped in aluminum foil.
2) Do not store a PBA where it is exposed to direct sunlight.

• Precautions when replacing PBA
1) Disconnect power connectors first, before disconnecting other cables.
2) Do not touch any soldered connections, connector terminals or other electronic parts when handling insulated parts.

• Precautions when checking PBA
1) Before touching a PBA, please touch other grounded areas of the chassis to discharge any static electrical charge
on the body.
2) Take care not to touch the PBA with your bare hands or metal objects as you could create a short circuit or get an
electric shock. Take extra care when handling PBAs with moving parts fitted such as sensors, motors or lamps as
they may get hot.
3) Take care when fitting, or removing, screws. Look out for hidden screws. Always ensure that the correct screw is
used and always ensure that when toothed washers are removed they are refitted in their original positions.

3-1

3. Disassembly and Reassembly

3.1.3. 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.

3-2

3. Disassembly and Reassembly

3.2. Screws used in the printer
The screws listed in the table below are used in this printer. Please ensure that, when you disassemble the printer, you keep
a note of which screw is used for which part and that, when reassembling the printer, the correct screws are used in the
appropriate places.
Part Code

Location

Description

Qty

6003-000196

FRAME

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000269

FRAME

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6006-001078

FUSER

SCREW-TAPTYPE;PH,+,WSP,B,M3,L10,ZPC(WHT),SWRCH18A

6003-000269

FUSER-LOWER

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000196

FUSER-UPPER

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000282

FUSER-UPPER

SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,-

6003-000196

FRAME-PATH

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000269

FRAME MAIN-LEFT

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000282

FRAME MAIN-LEFT

SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,-

6002-000308

FRAME MAIN-RIGHT

SCREW-TAPTYPE;PH,+,-,B,M2.6,L6,ZPC(WHT),SWRCH18A,-

6003-000269

FRAME MAIN-RIGHT

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000269

FRAME MAIN-MIDDLE

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000282

LSU

SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,-

6003-000269

FRAME-FEED IDLE

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000196

COVER-MIDDLE

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

OPE

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000282

SCANNER

SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,-

6003-000196

PLATEN

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

PLATEN-LOWER

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000269

DRIVE PLATEN

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000196

COVER-REAR

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

COVER-FRONT

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

COVER-MIDDLE

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

HOLDER-OPE

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

SHILED-CONTROLLER

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

SPEAKER

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000196

WLAN

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A

6003-000269

COVER-MIDDLE

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000269

COVER-REAR

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000269

FAX-PBA

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000269

MAIN PBA

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

6003-000269

SHIELD-CONTROLLER

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,-

3-3

3. Disassembly and Reassembly

3.3. Replacing the Main SVC parts
NOTE
The color of machine may differ from your machine depending on its model.

3.3.1. Right and Left cover
1. Open the Scanner.

3. Release the right cover.

2. Remove 2 screws from the rear.

4. Release the left cover.

3-4

3. Disassembly and Reassembly

3.3.2. Scanner Unit
1. Remove the right cover. (Refer to 3.3.1)
2. Unplug the connectors connecting the Scanner Unit on
the Main board.

4. Release the scanner hinge while pushing the platen
bottom connecting it.

5. Lift up and release the Scanner Unit.
3. Open the Scanner Unit.

3-5

3. Disassembly and Reassembly

3.3.3. ADF Unit
1. Remove the harness cover. Unplug the connector. And
release the ADF Unit.

3-6

3. Disassembly and Reassembly

3.3.4. CIS Unit
1. Remove the Scanner Unit and ADF Unit.

4. Unplug the CIS flat cable. Release the CIS Unit.

2. Remove 4 screws from the bottom of the platen.

3. Remove the platen upper from the platen lower.

5. Release the Belt-Timing Gear. Remove 3 screws. And
release the Scan Drive Unit.

Belt-Timing Gear

3-7

3. Disassembly and Reassembly

3.3.5. OPE Unit
1. Remove 2 screws.

4. Pull the OPE unit to the right and release it.

2. Remove the Holder-OPE.

5. Remove the OPE back cover after removing 4 screws.

3. Open up the OPE Unit.

6. Remove the OPE board after removing 1 screw.

3-8

3. Disassembly and Reassembly

3.3.6. Front Cover
1. Remove the Cover-Cassette.

3. Remove the front cover.

2. Remove 4 screws.

3-9

3. Disassembly and Reassembly

3.3.7. Middle Cover
1. Remove 2 screws from the front.

4. Release both jam levers from the jam cover.

2. Remove 2 screws from the top.

5. Lift up the middle cover after releasing the hooks.

Ho o k

3. Remove 1 screw.

3-10

3. Disassembly and Reassembly

3.3.8. Rear Cover
1. Release the connectors from the rear cover.

2. Release the rear cover after 3 screws.

3.3.9. Main board
1. Unplug all connectors on the main board.
2. Remove 4 screws.
3. Release the main board.

3-11

3. Disassembly and Reassembly

3.3.10. WLAN board
1. Unplug the flat cable.

3. Release the WLAN board.

2. Remove 1 screw.

3.3.11. Fax board
1. Unplug the flat cable. Remove the fax cover after
removing 2 screws.

3-12

2. Release the fax board after removing 2 screws.

3. Disassembly and Reassembly

3.3.12. SMPS/HVPS board
1. Remove the main board and fax board.

4. Remove the SMPS cover.

2. Remove the shield-controller after removing 4 screws.

5. Release the SMPS/HVPS board after removing 8
screws.
3. Remove 1 screw securing the SMPS cover.

3-13

3. Disassembly and Reassembly

3.3.13. Fuser Unit
1. Remove the main board. (Refer to 3.3.8)

3. Release the fuser unit after removing 3 screws.

2. Unplug the fuser connector.

3.3.14. Drive Unit
1. Release the Drive Unit after removing 4 screws.

3-14

3. Disassembly and Reassembly

3.3.15. LSU
1. Remove all covers.
2. Remove 2 screws securing the LSU cover.

4. Unplug 2 flat cables. Remove 3 screws. And release
the LSU.

3. Remove 2 screws securing the LSU cover. Unplug the
motor connector. And release the LSU cover.

3-15

3. Disassembly and Reassembly

3.3.16. Feed Sensor PBA
1. Remove the rear cover. (Refer to 3.3.7)

2. Unplug the connector after releasing the Feed Sensor
PBA.

3.3.17. Pick up roller
1. Remove 2 screws from the bottom.

3-16

2. Release the pick up roller.

3. Disassembly and Reassembly

3.3.18. Motor
1. Release the left frame after removing 7 screws.

2. Release the motor after removing 2 screws.

3-17

3. Disassembly and Reassembly

3.3.19. Transfer roller
1. Remove the toner cartridge.

4. Release the rear cover after removing 6 screws.

2. Release the left and right cover after removing 2 screws.
(refer to 3.3.1)

5. Push the Bush-TR from the rear and remove the
Transfer roller from the front.

3. Unplug the connectors on main board. Release the
scanner hinge. And release the scanner unit. (refer to
3.3.2)

6. When reassembling it, push the bush-TR in two
direction like below picture.

3-18

4. Alignment and Troubleshooting

4. Alignment and Troubleshooting
4.1. Alignment and Adjustments
This chapter describes the main functions for service, such as the product maintenance method, the test output related to
maintenance and repair, Jam removing method, and so on. It includes the contents of user guide.

4.1.1. Control Panel
NOTE
This control panel may differ from your machine depending on its model. There are various types of control panels.

SCX-340x, 340xW (3in1 model)

12
1

Eco

Turn into eco mode to reduce toner consumption and paper usage.

WPS

Configures the wireless network connection easily without a computer.

4-1

4. Alignment and Troubleshooting

Print
Screen

Press this button and the green LED will start blinking. If you want to print only the
active screen, release the button when the green LED stops blinking. If you want to
print the whole screen, release the button while it’s blinking.
NOTE
•

Print Screen can only be used in the Windows and Macintosh operating
systems.

•

You can only use this function with USB-connected machine.

•

When printing the active window/ whole monitor screen using the print screen
button, the machine may use more toner depending on what is being printed.

•

You can only use this function if the machine’s Easy Printer Manager program
is installed.

Scan to

Sends scanned data.

ID copy

Allows you to copy both sides of an ID card like a driver’s license on a single side
of paper.

Power

Turns the power on or off, or wakes up the machine from the power save mode. If
you need to turn the machine off, press this button for more than three seconds.

Front LED

When the LED lights on, place the front side of an ID card facing down on the
scanner glass.

Back LED

When the LED lights on, place the back side of an ID card facing down on the
scanner glass.

Stop / Clear

Stops an operation at any time and there are more functions.

+/- Buttons

•

Cancels the current job.

•

Prints demo page: Press and hold this button for about 2 seconds until the
status LED blinks slowly, and release.

•

Supplied Info & Event Log: Press and hold this button for about 6 seconds
and release.

•

Prints configuration reports/network configuration reports*: Press and hold
this button for about 4 seconds until the status LED blinks fast, and release.

Allows you to increase/decrease the number of page you want to copy. You can
determine the number of copies (up to 99 copies) you want to copy by pressing +/buttons. The default setting value is 1.
•

If you press +/- buttons briefly, the number of copies increases/decreases
by single digits.

•

If you press +/- buttons long, the number of copies increases/decreases
by ten-fold.

Start

Starts a job.

Status LED

Indicates the status of your machine.

Toner LED

Shows the status of the toner.

Display screen

Shows the current status and displays prompts during an operation.

4-2

4. Alignment and Troubleshooting

SCX-340xF, 340xFW, 340xFH (4in1 model)

Eco

Turn into eco mode to reduce toner consumption and paper usage.

WPS

Configures the wireless network connection easily without a computer.

Print Screen

Print Screen can only be used in the Windows and Macintosh operating
systems.

•

You can only use this function with USB-connected machine.

•

When printing the active window/ whole monitor screen using the print
screen button, the machine may use more toner depending on what is being
printed.

•

You can only use this function if the machine’s Easy Printer Manager
program is installed.

ID Copy

Allows you to copy both sides of an ID card like a driver’s license on a single side
of paper.

Power

Turns the power on or off, or wakes up the machine from the power save mode. If
you need to turn the machine off, press this button for more than three seconds.

Fax

Switches to Fax mode.

Copy

Switches to Copy mode.

Scan

Switches to Scan mode.

4-3

4. Alignment and Troubleshooting

Opens Menu mode and scrolls through the available menus.

Left/ Right Arrows

Scrolls through the options available in the selected menu and increases or decreases
values.

Confirms the selection on the screen.

Back

Sends you back to the upper menu level.

Start

Starts a job.

Stop/ Clear

Stops an operations at any time.

Status LED

Indicates the status of your machine.

Numeric keypad

Dials a number or enters alphanumeric characters.

On Hook Dial

When you press this button, you can hear a dial tone. Then enter a fax number. It is
similar to making a call using speaker phone.

Redial/
Pause(-)

Redials the last number in ready mode, or inserts a pause(-) into a fax number in
edit mode.

Address Book

Allows you to store frequently used fax numbers or search for stored fax numbers.

Display screen

Shows the current status and displays prompts during an operation.

4-4

4. Alignment and Troubleshooting

4.1.2. Understanding the status LED
The color of the LED indicates the machine's current status.
NOTE
•

Some LEDs may not be available depending on model or country.

•

To resolve the error, look at the error message and its instructions from the troubleshooting part.

•

You also can resolve the error with the guideline from the computers’s Printing Status or Smart Panel program window.

LED

Status

Description

Off

The machine is off-line.

Green

Blinking
On

Blinking
Status

Red

Orange

Blue
WPS

Blue
Power

Eco

Toner

•

The machine is on-line and can be used.

•

A minor error has occurred and the machine is waiting for the error to be cleared.
Check the display message. When the problem is cleared, the machine resumes.

•

Small amount of toner is left in the cartridge. The estimated cartridge life of toner is
close. Prepare a new cartridge for replacement. You may temporarily increase the
printing quality by redistributing the toner.

•

A toner cartridge has almost reached its estimated cartridge life*. It is recommended
to replace the toner cartridge.

•

The cover is opened. Close the cover.

•

There is no paper in the tray. Load paper in the tray.

•

The machine has stopped due to a major error. Check the display message.

Blinking

Upgrading firmware.

A paper jam has occurred.

Blinking

The machine is connecting to a wireless network.

The machine is connected to a wireless network.

Off

The machine is disconnected from a wireless network.

The machine is in power save mode.

Off

The machine is in ready mode or machine’s power is off.

Eco mode is on. 2-up, toner save on, skip blank page feature will automatically be applied
when printing. For 3 in 1 model, this function can be applied when printing from PC.

Off

Eco mode is off.

Blinking

Small amount of toner is left in the cartridge. The estimated cartridge life* of toner is close.
Prepare a new cartridge for replacement. You may temporarily increase the printing quality
by redistributing the toner.

A toner cartridge has almost reached its estimated cartridge life*. It is recommended to
replace the toner cartridge

Off

All toner cartridges are at normal capacity.

Green

Orange

When the backlight blinks, the machine is receiving or printing data.

4-5

4. Alignment and Troubleshooting

NOTE
* Estimated cartridge life means the expected or estimated toner cartridge life, which indicates the average capacity of print-outs
and is designed pursuant to ISO/ IEC 19752. The number of pages may be affected by operating environment, percentage of
image area, printing interval, graphics, media and media size. Some amount of toner may remain in the cartridge even when
red LED is on and the printer stops printing.

4-6

4. Alignment and Troubleshooting

4.1.3. JAM removal
4.1.3.1. Clearing original document jams
NOTE
Illustrations on this user’s guide may differ from your
machine depending on its options or models.

Original paper jam in front of scanner
1) Open the document feeder cover.

00
00

3) Close the document feeder cover.

00
00

2) Gently remove the jammed paper from the document
feeder.

4-7

4. Alignment and Troubleshooting

Original paper jam inside of scanner
1) Open the document feeder cover.

4) Open the document feeder.

00
00

2) Gently remove the jammed paper from the document
feeder.

5) Grasp the misfeed paper, and remove the paper from
the feed area by carefully pulling it.

3) Close the document feeder cover.

00
00

4-8

6) Close the document feeder.

4. Alignment and Troubleshooting

4.1.3.2. Clearing paper jams
NOTE
To avoid tearing the paper, pull the jammed paper out slowly
and gently.

In Tray
1) Remove the jammed paper by gently pulling it straight
out.

Inside the machine
1) Open the scanner unit.

2) Open the jam cover.

4-9

4. Alignment and Troubleshooting

3) Open the fuser dummy cover.

6) Close the jam cover. And then close the scanner unit.

4) Remove the jammed paper by gently pulling it straight
out.

If you do not see the paper in this area, stop and go to
next step.
7) Open the scanner unit.

8) Open the middle cover.
5) Close the fuser dummy cover.

4-10

4. Alignment and Troubleshooting

9) Remove the toner cartridge.

12) Close the middle cover.

10) Remove the jammed paper by gently pulling it straight
out.

13) Close the scanner unit.

11) Reinstall the toner cartridge.

4-11

4. Alignment and Troubleshooting

4.1.4. Useful menu item for service
1) Monitoring the supplies life
If you experience frequent paper jams or printing problems, check the number of pages the machine has printed or scanned.
Replace the corresponding parts, if necessary.
1) Select Menu > System Setup > Maintenance > Supplies Life on the control panel.
2) Select the option you want and press OK.
•

Supplies Info: Prints the supply information page.

•

Total: Displays the total number of pages printed.

•

ADF Scan: Displays the number of pages printed by using the document feeder.

•

Platen Scan: Displays the number of pages scanned by using scanner glass.

3) Press “Stop/ Clear” to return to ready mode.

2) Altitude adjustment
Print quality is affected by atmospheric pressure, which is determined by the height of the machine above sea level. The
following information will guide you on how to set your machine for the best print quality.
Before you set the altitude value, determine the altitude where you are.
4,000 m
(13,123 ft)

1
3,000 m
(9,842 ft)

2
2,000 m
(6,561 ft)

1,000 m
(3,280 ft)

4
0

1
2
3
4

High 3
High 2
High 1
Normal

You can set the altitude value from Device Settings or Machine section in Printer Settings Utility program.

• For Windows and Macintosh, open the Samsung Easy Printer Manager program.
Click Device Settings > Link to Program button, you can configure various machine settings.

• For Linux, open the Smart Panel program.
Click Printer Setting. Click Setting > Altitude Adjustment. Select the appropriate value from the drop-down list, and
then click Apply.
You can also set the altitude in System Setup option on the machine’s display.

• Select “Menu > System Setup > Machine Setup > Altitude Adj. on the control panel.
NOTE
If your machine is connected to the network, you can set the altitude via SyncThru™ Web Service.

4-12

4. Alignment and Troubleshooting

4.1.5. Periodic Defective Image
If an image defects appears at regular intervals on the printed-paper, it is due to a faulty or damaged roller. Refer to the table
below and check the condition of the appropriate roller.

Roller

Period (mm)

Phenomenon

Defective part

Pressure Roller

62.8 mm

Background

Fuser Unit

Heat Roller

63.7 mm

Black spot and image ghost

Charging Roller

26.7 mm

Black Spot and line and periodic band

OPC Drum

62.9 mm

White and Black Spots

Developing Roller

33.7 mm

White spot, Horizontal black band

Supply Roller

78.2 mm

Periodic Band by little difference of density

Transfer Roller

39.3 mm

Ghost, Damaged image by abnormal
transfer

Toner Cartridge

Transfer roller

4-13

4. Alignment and Troubleshooting

4.1.6. Useful management tools
4.1.6.1. Using Samsung Easy Printer Manager (Windows and Macintosh only)
NOTE
•

This feature may not be available depending on model or optional goods.

•

Available for Windows or Macintosh OS users only.

•

For Windows, Internet Explorer 6.0 or higher is the minimum requirement for Samsung Easy Printer Manager.

Samsung Easy Printer Manager is an application that combines Samsung machine settings into one location. Samsung
Easy Printer Manager combines device settings as well as printing environments, settings/actions and launching. All of
these features provide a gateway to conveniently use your Samsung machine. Samsung Easy Printer Manager provides two
different user interfaces for the user to choose from: the basic user interface and the advanced user interface. Switching
between the two interfaces is easy: just click a button.

Understanding Samsung Easy Printer Manager
To open the program:

• For Windows, Select Start > Programs or All Programs > Samsung Printers > Samsung Easy Printer Manager >
Samsung Easy Printer Manager.

• For Macintosh, Open the Applications folder > Samsung folder > Samsung Easy Printer Manager.
The Samsung Easy Printer Manager interface is comprised of various basic sections as described in the table that follows:
NOTE
The screenshot may differ depending on operating system you are using.

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4. Alignment and Troubleshooting

Area

Description

Printer List

The printer list displays the installed printer icons on your computer.

Printer Information

This area gives you general information about your machine. You can check
information, such as the machine’s model name, IP address (or Port name),
and machine status.
NOTE
Troubleshooting button: This button opens Troubleshooting Guide when an
error occurs. You can directly open the necessary section in the user’s guide.

Application Information

Includes links for changing to the advanced settings, preference, help, and
about.

Quick links

Displays Quick links to machine specific functions. This section also includes
links to applications in the advanced settings.

Contents Area

Displays information about the selected machine, remaining toner level,
and paper. The information will vary based on the machine selected. Some
machines do not have this feature.

Order Supplies

Click on the Order button from the supply ordering window. You can order
replacement toner cartridge(s) from online.

Advanced settings user interface overview
The advanced user interface is intended to be used by the person responsible for managing the network and machines.

• Device Settings
You can configure various machine settings such as machine setup, paper, layout, emulation, network, and print
information.

• Scan to PC Settings
This menu includes settings to create or delete scan to PC profiles.

Scan Activation : Determines whether or not scanning is enabled on the device.
Profile : Displays the scanning profiles saved on the selected device.
Basic tab : Contains settings related general scan and device settings.
Image tab : Contains settings related to image altering.

• Fax to PC settings
This menu includes settings related to the basic fax functionality of the selected device.

- Disable : If Disable is On, incoming faxes will not be received on this device.
- Enable Fax Receiving from Device : Enables faxing on the device and allow more options to be set.
• Alert Settings
This is menu includes settings related to error alerting.

- Printer Alert : Provides settings related to when alerts will be received.
- Email Alert : Provides options relating to receiving alerts via email.
- History Alert : Provides a history of device and toner related alerts.
• Job Accounting
Provides querying of quota information of the specified job accounting user. This quota information can be created and
applied to devices by job accounting software such as SyncThru™ or CounThru™ admin software.

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4. Alignment and Troubleshooting

4.1.6.2. Using Samsung Printer Status (Windows only)
The Samsung Printer Status is a program that monitors and informs you of the machine status.
NOTE
•

The Samsung Printer Status window and its contents shown in this user’s guide may differ depending on the machine
or operating system in use.

•

Check the operating system(s) that are compatible with your machine.

Samsung Printer Status overview
If an error occurs while operating, you can check the error from the Samsung Printer Status. Samsung Printer Status is
installed automatically when you install the machine software.
You can also launch Samsung Printer Status manually. Go to the Printing Preferences , click the Basic tab > Printer
Status button.
These icons appear on the Windows task bar:
Icon

4-16

Mean

Description

Normal

The machine is in ready mode and experiencing no errors or warnings.

Warning

The machine is in a state where a soft error has occurred. For example, a toner low status,
which may lead to toner empty status.

Error

The machine has at least one hard error, such as out of paper, fuser error, etc. Machine
does not have ability to come to ready without customer intervention.

Toner Level

You can view the level of toner remaining in each toner cartridge. The machine
and the number of toner cartridge(s) shown in the above window may differ
depending on the machine in use. Some machines do not have this feature.

Alert Settings

Select the settings you want from the options window.

Order Supplies

You can order replacement toner cartridge(s) from online.

Troubleshooting

You can directly open the troubleshooting section in the user’s guide.

Close the window.

4. Alignment and Troubleshooting

4.1.6.3. Using Smart Panel (Linux only)
Smart Panel is a program that monitors and informs you of the machine’s status, and allows you to customize the machine’s
settings. You can download Smart Panel from the Samsung website.
NOTE
•

The Smart Panel window and its contents shown in this user’s guide may differ depending on the machine or operating
system in use.

•

Check the operating system(s) that are compatible with this model.

Smart Panel overview
If an error occurs while operating, you can check the error from the Smart Panel. You can also launch Smart Panel manually.
Double-click the Smart Panel icon

in the Notification Area.

Toner Level

You can view the level of toner remaining in each toner cartridge. The machine and the
number of toner cartridge(s) shown in the above window may differ depending on the
machine in use. Some machines do not have this feature.

Buy Now

You can order replacement toner cartridge(s) from online.

User’s Guide

You can view the online User’s Guide.
NOTE
This button opens the Troubleshooting Guide when an error occurs. You can directly
open the troubleshooting section in the user’s guide.

Printer Setting

You can configure various machine settings in the Printer Settings Utility window. Some
machines do not have this feature
NOTE
If you connect your machine to a network, the SyncThru™ Web Service window
appears instead of the Printer Settings Utility.

Changing Smart Panel‘s settings
Right-click in Linux on the Smart Panel icon and select Configure smart panel. Select the settings you want from the
Configure smart panel window.
Copyright© 1995-2011 SAMSUNG. All rights reserved.

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4. Alignment and Troubleshooting

4.1.6.4. Using SyncThru Web Service (SWS)
SWS is an embedded web server in the machine. This web server informs you of machine configuration, version, status and
allows you to customize the machine’s settings. You can contact this server via wired and wireless network using your
web browser in the remote place.

Connecting preparations

• Wired or Wireless Network connection is established.
• Browser (Ex> Internet Explorer) Program on your PC network connected
SWS overview
SyncThru Web Service (SWS)

• accepts HTTP request via port 80 as normal web servers.
• provides interface to users information of networked printers and allow to configure the setting of printers.
• is able to provide more complicated options than Local UI for printer configuration.

Connection Procedure
1) Open the Web-browser and input IP address of machine. Click “Login”.
2) Log-in Admin Mode. (ID: admin, PW: sec00000)
3) Select pages to check the configuration and customize the settings.
CAUTION
Please, change SWS Default ID and Password for system security in case of your first connection.

4-18

4. Alignment and Troubleshooting

NOTE
If the machine supports ‘Direct Print’, you can enable this function using the SWS menu. The default configuration is
‘Disabled’ for your security.
Firstly, you have to login to SWS.

1) Click ‘Direct Print Configuration’ in the pop up windows when clicking ‘Direct Print’.
2) In the ‘Services’ Menu, check ‘Direct Print’.

Or,

1) Click ‘System Security’ in the ‘Security’ menu.
2) Select ‘Feature Management’ in the left frame.
3) In the ‘Services’ Menu, check ‘Direct Print’.

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4. Alignment and Troubleshooting

4.1.7. Updating Firmware
This chapter includes instructions for updating the printer firmware. You can update the printer firmware by using one
of the following methods :

• Update the firmware by using the USB port.
• Update the firmware by using the Network.

4.1.7.1. Update the firmware by using the USB port
Upgrading preparations

• usblist2.exe : Tool which sends firmware data to printer.
• Firmware file to update.
Upgrade Procedure
1) Turn the machine off.
2) Connect USB cable to printer.
3) Turn the machine on. Check if the printer is the ready status.
4) Drag the firmware file and Drop down on the usblist2.exe.

And then firmware update will be started automatically.
5) When upgrading is completed, machine is automatically re-booting.

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4. Alignment and Troubleshooting

4.1.7.2. Update the firmware by using the network
Upgrading preparations

• Wired or Wireless Network connection is established.
• Firmware file to update
Upgrade Procedure
1) Open the Web-browser and input IP address of machine. Click “Login”.

2) Log-in Admin Mode. (ID: admin, PW: sec00000)

3) Select Maintenance menu and click “upgrade wizard”

4-21

4. Alignment and Troubleshooting

4) Select firmware file using “browser” button and press next button.

5) SyncThru will check verify firmware file and compare version and press next button.

6) Machine starts upgrading. SyncThru will return home page after upgrading is completed.

4-22

4. Alignment and Troubleshooting

4.1.8. Tech Mode
In service (tech) mode, the technician can check the machine and perform various test to isolate the cause of a malfunction.
While in Tech mode, the machine still performs all normal operations.

4.1.8.1. Tech mode (4 in 1 model)
a) Entering Tech mode
1) Press “Menu > # > 1 > 9 > 3 > 4” on the control panel continuously.
2) Press Menu.
3) Select “Tech Mode”.

b) Tech mode menu
NOTE
This function does not supported for SCX-340x/SCX- 340xW Series.
Depth 1

Depth 2

Depth 3

Data Setup

Send Level

[9-15]

DTMF Level

High [0-15]

Pause Time

[1-9]

Dial Mode

Tone, Pulse

Modem Speed

33.6, 28.8, 14.4, 12.0, 9.6, 4.8

Error Rate

5%, 10%

Clear All Mem.
Toner Low Level

[1:30]:10

Clear Count

Machine Test

Engine Footer

Off, On

Dial Tone

Off, On

Caller ID

Off, On

Switch Test
Modem Test
Dram Test
Rom Test
Shading Test
Scan Aging

4-23

4. Alignment and Troubleshooting

Depth 1

Depth 2

Report

All Report

Depth 3

Protocol
Supplies Info
Configuration
Error Info
Usage Counter
Component Check
Fax Options
EDC Mode

NVM Initialize
NVM Read Write
Test Routine

c) Data Setup

• Send Level
You can set the level of the transmission signal. Typically, the Tx level should be under -12 dBm.
NOTE
The Send Fax Level is set at the best condition in the shipment from factory.

• DTMF Level
This is a setting value of the High level tone and low level tone at DTMF mode. (Not dial mode)

• Pause Time
It shows the delay time when receiving the pause input at auto dial.

• Dial Mode
This function can choose dial method.
* Default : Dial (Dial/Pulse)

• Modem Speed
You can set the maximum modem speed. Communication is done with modem speed automatically set at lower speed
when communicating with a slower speed modem since communication is done on the standard of the side where
modem speed is low for transmission/reception. It is best set 33.6 Kbps as default setting.

• Error Rate
When the error rate is about exceed the set value, the Baud rate automatically adjusts to 2400 bps. This ensures that the
error rate remains below the set value. You can select the rate between 5% and 10%.

4-24

4. Alignment and Troubleshooting

• Clear All Memory
The function resets the system to factory default settings. This function is used to reset the system to the initial value
when the product is functioning abnormally . All the values are returned to the default values, and all the information,
which was set by the user, will be erased.
NOTE
Always perform a memory clear after replacing the main board. Otherwise, the system may not operate properly.

• Toner Low Level
The function is to set up the time to inform toner low status. This function can provide user convenience for replacing
the toner cartridge.

• Clear Count
This function resets the count value you select.

• Engine Footer
This function is for monitoring of the engine status. If you perform this function, at printing, the setting value for engine
is shown on the bottom of the printed page.

d) Machine Test

• Switch Test
Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each
time you press a key.

• Modem Test
Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem. If
no transmission signal sound is heard, it means the modem part of the main board malfunctioned.

• Dram Test
Use this feature to test the machine’s DRAM. The result appears in the LCD display.

• Shading Test
The function is to get the optimum scan quality by the specific character of the CIS (Contact Image Sensor). If the copy
image quality is poor, perform this function to check the condition CIS unit.

e) Report

• All report
You can print all report at a time.

• Protocol
Protocol list shows the sequence of the CCITT group 3 T.30 protocol during the most recent sending or receiving
operation. Use this list to check for send and receive errors.

• Supplies Info
Supplies Information Report shows toner cartridge information such as toner remaining, toner capacity, toner product
date etc.

• Configuration
Configuration report shows the status of the user-selectable options. You may print this list to confirm your changes
after changing settings. This page provides useful information for service.

• Error Info
Error Information Report shows error records.
Copyright© 1995-2011 SAMSUNG. All rights reserved.

4-25

4. Alignment and Troubleshooting

• Usage Counter
Usage page report shows usage page counts since service date. It shows total counts of the simplex print and duplex print.

• Component Check
Component Check Report shows the operation procedure of the machine test in tech mode.

f) EDC mode

• NVM Initialize
This menu is to initialize the NVM value.

• NVM Read/Write
This menu can change a configuration value for engine firmware.

• Test Routines
This menu can perform the operation test for the main components.
Code

4-26

Displayed Name

Meaning

Input /
Output

State
Displayed

100-0000 Main BLDC Motor

Main BLDC Motor is On/Off

Output

On[Off]

101-0010 T1 Pick-Up Clutch

Engages drive to pick up a paper from tray1.

Output

On[Off]

102-0290 Feed Sensor

Detect when a paper is at Feed sensor.

Input

High[Low]

105-0030 Black MHV Bias

Black MHV bias voltage on at normal drive level

Output

On[Off]

106-0030 Black Dev Bias

Black Dev bias voltage on at normal drive level

Output

On[Off]

107-0030 Black THV Bias

Black THV bias voltage on at normal drive level

Output

On[Off]

107-0031 Black THV(-) Bias

Black THV bias voltage on at normal drive level

Output

On[Off]

109-0000 Fuser Temperature A

Detects what the temperature A is on fuser.

Input

Numeric 3
digits

109-0050 Fuser Bias

Fuser bias voltage on at normal drive level

Output

On[Off]

110-0000

LSU Motor1 Run
Ready

Detects if LSU motor1 runs at normal speed.

Input

High[Low]

110-0060

LSU Motor1 Run

LSU Motor1 On/Off

Output

On[Off]

110-0110

LSU LD Power4

LSU LD4 Power On/Off (black)

Output

On[Off]

4. Alignment and Troubleshooting

4.1.8.2. Tech Mode (3 in 1 model)
a) Entering Tech mode
In order to enter tech mode, please press button step by step as follows:

• Up > Up > Stop > Down > Down > Stop > Stop
Machine displays “UC” in 7 segment area in tech mode.

NOTE
•

Button interval is 2 second under.

•

If Stop button is pressed in tech mode, machine returns user mode.

•

When machine is power off and then on, machine returns user mode.

•

Any key was not pressed in tech mode during 30 seconds, machine return user mode.
(Time is depend on machine timeout)

•

You can’t enter tech mode when machine is working (e.g. printing/scanning/coping)

•

Machine will not enter sleep mode in tech mode

b) Tech mode menu
LCD Display

Description

Print usage counter report (UC)

Print Shading Report (Report prints out after shading)

Print Supplies Info Report

Print Event Log

Print All Reports

•

Shading is not work, just print out with current shading data

•

Exception Report is not printed

Executes Scanner Aging (If cancel button is pressed, then aging is finished)

4-27

4. Alignment and Troubleshooting

LCD Display

Description

Executes Factory Memory Clear

Control Toner Low Level
•

Toner low alert function is that if machine has 10% below toner, then machine
will display alert to tell toner low.

•

This feature comes from market requirement. You can control percentage for
showing toner low alert from 1 to 30.

c) Scanner Aging

• [Enter Scanner Aging mode]
1) Select “SA” in Tech mode using Up/Down button pressing.
2) Scanner will execute scanning infinitely.

• [Enter Scanner Aging mode]
Press Cancel during scan again working.

d) Factory memory clearing

• [Memory Clearing Mode Sequence]
1) Select “FC” menu in tech mode.
2) If you choice factory clear, country number will be displayed on 7 segment.
Select country number using Up/Down key.
Country

4-28

Number

Country

Number

Country

Number

GREECE

HONGKONG

FRANCE

TURKEY

UKRAINE

AUSTRIA

RUSSIA

KAZAKHSTAN

SWITZERLAND

SOUTHAFRICA

UZBEKISTAN

ITALY

INDIA

ESTONIA

SPAIN

SRILANKA

LATVIA

PORTUGAL

USA

LITHUANIA

NORWAY

CANADA

PUERTORICO

FINLAND

BRAZIL

VENEZUELA

SWEDEN

CHILE

AUSTRALIA

NETHERLANDS

MEXICO

TAIWAN

DENMARK

ARGENTINA

SINGAPORE

BELGIUM

PERU

KOREA

HUNGARY

OMAN

LUXEMBOURG

POLAND

BANGLADESH

COLOMBIA

CZECH

KUWAIT

SAUDIARABIA

ROMANIA

MOROCO

ISRAEL

BULGARIA

ALGERIA

IRAN

IRELAND

PAKISTAN

URUGUAY

GERMANY

UAE

CHINA

4. Alignment and Troubleshooting

Country

Number

THAILAND

TRINIDAD

EGYPT
JORDAN
LEBANON
QATAR
TUNISIA

62
63
64
65
66

YEMEN

CYPRUS

ICELAND
YUGOSLAVIA
NEWZEALAND
MALAYSIA
PANAMA
SLOVENIA
CROATIA
SERBIA
GUATEMALA

69
70
71
72
73
74
75
76
77

ECUADOR

COSTARICA

DOMINICAN
REPUBLIC

Country

Number

NETHERLAND
ARTILLES

ARTIGUA

BAHAMAS

BARBADOS

BELIZE

BERMUDA

BONAIRE

ELSALVADOR

GRANDCAYMAN

GUYANA

HAITI

HONDURAS

JAMICA

SURINAME

TURKSCAICOS

BOLIVIA

GRENADA

PARAGUAY

STVINCENT

STMAARTEN

100

STLUCIA

101

IRAQ

102

Country

Number

BAHRAIN

103

NICARAGUA

104

SLOVAKIA

105

INDONESIA

106

VIETNAM

107

CAMBODIA

108

PHILIPPINES

109

SYRIA

110

MALTA

111

LIECHTENSTEIN

112

ALBANIA

113

MACEDONIA

114

BOSNIA

115

LAOS

116

NEPAL

117

LIBYA

118

NIGERIA

119

KENYA

120

TANZANIA

121

SUDAN

122

PALESTINE

123

MONTENEGRO

124

3) Press “Start” Key.
4) Machine will execute memory cleaning.
5) After factory memory clearing, machine power off.
NOTE
-

You can cancel if machine state in 1~3 sequence number.

You can’t cancel factory clearing during 4 sequence number .

• [Memory Clearing not working cases]
- Memory clearing is only available in idle mode.
- Especially, when machine is working in tech mode, if you will select factory clearing, working job will be canceled
and then memory clearing is started.

e) Toner Low Alert Level Control

• [Execution Flow]
1) Select “LC” menu item in tech mode.
2) Machine will display current toner low setting value on 7 segment .
3) Select number using up/down key. You can select 1~30.
Copyright© 1995-2011 SAMSUNG. All rights reserved.

4-29

4. Alignment and Troubleshooting

4) If you select “start” key, then choice value is accepted and returns to menu choice mode.

4.1.9. EDC program (3 in 1 model only)
NOTE
SCX-340x/340xW (3 in 1) model has not EDC menu in tech mode. Instead, there is a program for EDC function.

The EDC program can check the machine status and perform various test to isolate the cause of a malfunction.

1) How to use the EDC program
1) Download the EDC program in your PC.
2) Connect the printer to the computer using USB cable.
3) Turn on the printer and wait for the printer to finish initializing.
4) Start EDC program. Press the “Menu” Button

5) To exit the EDC Mode, press the “Exit” button.

2) EDC mode menu
Displayed Name

Meaning

Main BLDC Motor

Main BLDC Motor is On/Off

T1 Pick-Up Clutch

Engages drive to pick up a paper from tray1.

Feed Sensor

Detect when a paper is at Feed sensor.

Black MHV Bias

Black MHV bias voltage on at normal drive level

Black Dev Bias

Black Dev bias voltage on at normal drive level

Black THV Bias

Black THV bias voltage on at normal drive level

Black THV(-) Bias

Black THV bias voltage on at normal drive level

Fuser Temperature A

Detects what the temperature A is on fuser.

Fuser Bias

Fuser bias voltage on at normal drive level

LSU Motor1 Run Ready

Detects if LSU motor1 runs at normal speed.

LSU Motor1 Run

LSU Motor1 On/Off

LSU LD Power4

LSU LD4 Power On/Off (black)

4-30

4. Alignment and Troubleshooting

4.2. Troubleshooting
4.2.1. Procedure of checking the symptoms
Before attempting to repair the printer first obtain a detailed description of the problem from the customer.

Power On

OPE LED
ON?

OPE LED
Green OK?

- No Power
- Power Module error
- Main PBA

Red LED on /
Error message
is displayed.

See the troubleshooting
for error code

Print (test page)

Printing
quality is
nomal?

Refer to "Solution
of Image Problem"

END

4-31

4. Alignment and Troubleshooting

4.2.1.1. Basic Check List
1) Check the Power.
•

Check that the power switch is turned on.

•

Check that the power cable is plugged into the outlet and the printer.

•

Check the voltage of the power outlet.

2) Check the LED of Panel.
•

Is there OPE LED ON?
›

•

If not check power cable, switch SMPS or Main board.

Is the abnormal Lamp?
›

Check the Main board 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 image quality problem section.

6) Check consumables (toner etc.).
•

Using the keys print the Test Pattern.
›

4-32

Expected life of various consumable parts, compare this with the figures printed and replace as required

4. Alignment and Troubleshooting

4.2.2. Error Code and Troubleshooting
NOTE
Some messages may not appear on the display depending on the options or models.

• SCX-340xF/ 340xFW/ 340xFH (4 in 1)
Messages appear on the control panel display to indicate the machine’s status or errors.

• SCX-340x/ 340xW (3 in 1)
These models have not the LCD. If machine has error, it is hard to know which kinds of error is happened.
In case of this, machine supports error code display mode.

- [Enter Error Code Display Mode]
Press button continuously as following key sequence : Power > Up > Down > Power > Power
NOTE
▪

Machine only display error code in idle mode. In other word, machine can’t print when it is working.

▪

Button interval time between each key sequence is 2 seconds below.

▪

Machine automatically returns to idle mode after power off/on.

- [Exit Error Code Display Mode]
In order to exit error code mode, there are two kinds of method.

▪ By pressing cancel key : Whenever you press cancel key during error codes are displayed, then return to
idle mode.

▪ Automatically return : Machine will return idle mode after all error codes are displayed.
Error Code

Error Message

Troubleshooting

C2-1110

Prepare new cartridge

Page 4–35

C2-1120

Replace new cartridge

Page 4–35

C2-1140

Replace new cartridge

Page 4–35

C2-1410

Install toner cartridge

Page 4–35

C2-1510

Not Compatible Toner cartridge

Page 4–36

C2–1710

Error: #C2-1710 Call for Service

Page 4–35

C2–1711

Error: #C2-1711 Call for Service

Page 4–35

C2–1712

Error: #C2-1712 Call for Service

Page 4–35

M2-1110

Paper Jam inside machine

Page 4–36

M2–1116

Paper jam or empty

Page 4–36

M2–1317

Paper Jam inside machine

Page 4–37

S1-5221

Install wireless NIC

Page 4–37

S2-4110

Door open Close it

Page 4–38

S3–3121

Scanner Locked.

Page 4–39

S6-3123

Network Problem: IP Conflict

Page 4–40

U1-2320

Error #U1-2320 Turn off then on

Page 4–40

U1-2330

Error #U1-2330 Turn off then on

Page 4–40

U1-2340

Error #U1-2340 Turn off then on

Page 4–40

U2-1112

Error #U2-1112 Turn off then on

Page 4–41

4-33

4. Alignment and Troubleshooting

Error Code

Error Message

Troubleshooting

U2-1113

Error #U2-1113 Turn off then on

Page 4–41

U3-3313

Document jam. Remove jam

Page 4–42

U3-3314

Document jam. Remove jam

Page 4–42

U3-4110

Door of scanner is open.

Page 4–42

4-34

4. Alignment and Troubleshooting

► Error Code
C2–1110
C2–1120
C2–1140
► Error message
Prepare new toner cartridge.
Replace new cartridge.
Replace new cartridge.
► Symptom
The remaining toner cartridge is less than 10% / The toner cartridge is at the end of its life.
► Troubleshooting method
Print the supply information report.
Check the life remaining of the toner cartridge.
If its life is at the end, turn the machine off and replace the toner cartridge with new one.

► Error Code
C2–1410
C2–1710
C2–1711
C2–1712
► Error message
Install cartridge.
Error: #C2-1710 Call for Service
Error: #C2-1711 Call for Service
Error: #C2-1712 Call for Service
► Symptom
The toner cartridge is not installed. / The machine can’t detect the toner cartridge.
► Troubleshooting method
1) Check if the toner cartridge is installed. If it is OK, turn the machine off then on.
2) If the error message is not disappear, remove the toner cartridge. Thoroughly roll the cartridge five or six times to
distribute the toner evenly inside the cartridge. And reinstall the toner cartridge.
3) If the problem persists, check that the CRUM contact area is contaminated. Clean it.

4-35

4. Alignment and Troubleshooting

► Error Code
C1–1510
► Error message
Not compatible Toner cartridge
► Symptom
Toner cartridge is not compatible.
► Troubleshooting method
1) Print the supply information report. Check information of the toner cartridge.
2) If the toner cartridge is not a Samsung genuine toner cartridge, replace with new one.

► Error Code
M2–1110
M2–1116
► Error message
Paper jam inside machine.
Paper jam or empty
► Symptom
A paper jam was detected at the feed sensor.
► Troubleshooting method
1) Check if paper is on tray.
2) Remove the jammed paper. (Refer to 4.1.3 Jam removal)
3) If the jammed paper occurs continually, check the followings.
a) Check if the pick up rubber or friction pad is worn out or contaminated. Clean the contaminated part or replace it.

b) Check if the connector is connected to the feed sensor PBA correctly.
c) Check if the actuator is assembled correctly.
d) If the connection and actuator are OK, replace the feed sensor PBA.

4-36

4. Alignment and Troubleshooting

► Error Code
M2–1317
► Error message
Paper Jam inside machine
► Symptom
A paper jam was detected in the fuser unit area.
► Troubleshooting method
1) Open the top cover. Remove the jammed paper.
2) Turn the machine off.
3) Turn the machine on while pushing the cancel button. Wait for rebooting the machine.

► Error Code
S1–5221
► Error message
Install wireless NIC
► Symptom
The communication error between the main board and the wireless board has occurred.
► Troubleshooting method
1) Check if the connection between the main board and the wireless board is normal.

2) If the connection is OK, replace the flat cable.
3) If the flat cable is OK, replace the WLAN board.
4) If the problem persists after replacing the WLAN board, replace the main board.

4-37

4. Alignment and Troubleshooting

► Error Code
S2–4110
► Error message
Door open. Close it.
► Symptom
Top cover is open or the cover open switch is defective.
► Troubleshooting method
1) Check if the top cover is closed perfectly. Open and close it.
2) Remove the right cover. Check if the connection between the main board and SMPS/HVPS board is correct.
3) Check if the cover open switch on SMPS/HVPS board is operated properly. If it is defective, replace the
SMPS/HVPS board.

4-38

4. Alignment and Troubleshooting

► Error Code
S3–3121
► Error message
Scanner Locked.
► Symptom
CIS unit in the scanner does not move.
► Troubleshooting method
1) Check if the CIS unit moves when turning the machine off then on.
2) Check if the CIS cable is connected correctly. Reconnect it.

3) If the CIS unit is defective, replace it.
4) Check if there is any defective part in the scanner. Find and replace it.
5) If the problem persists, replace the main board.

4-39

4. Alignment and Troubleshooting

► Error Code
S6–3123
► Error message
Network Problem : IP Conflict
► Symptom
Network has some problem. (IP address conflicts with that of other system. / Communication error / There is no
response when checking the ping test.)
► Troubleshooting method
Change the machine’s IP address.
•

Execute the Samsung Easy Printer Manager program. (Device setting — Network — IP address). Change the
IP address.

•

In case of DHCP or Bootp, reboot the machine to receive a new IP address.

► Error Code
U1–2320
U1–2330
U1–2340
► Error message
Error #U1-2320 Turn off then on
Error #U1-2330 Turn off then on
Error #U1-2340 Turn off then on
► Symptom
The temperature control of fuser unit is abnormal. (U1–2320 : Open Heat Error / U1–2330 : Low Heat Error / U1–2340
: Over Heat Error)
► Troubleshooting method
1) Turn the machine off. Re-install the fuser unit. Then turn the machine on. Is the error message is disappeared?
2) If the problem persists, turn the machine off and remove the fuser unit.
a) Check if the fuser connector is connected properly.
b) Check if the input voltage is normal.
c) Check if the thermistor is twisted or contaminated.
3) After confirming continuity in the fuser connector and the problem still exists; order an SMPS/HVPS and Fuser
Unit and install as is necessary.

4-40

4. Alignment and Troubleshooting

► Error Code
U2–1112
U2–1113
► Error message
Error #U2-1112 Turn off then on
Error #U2-1113 Turn off then on
► Symptom
LSU Motor does not work normally.
► Troubleshooting method
1) Check if the LSU harness on the main board is connected properly. (picture- 1)
2) If it is OK, check that the LSU harness on LSU board is connected properly. (picture- 2,3)
3) Check if the LSU harness is defective. (picture- 4,5)
4) If the problem persists, replace the LSU.
5) If the problem persists after replacing LSU, replace the main board.

4-41

4. Alignment and Troubleshooting

► Error Code
U3–3313
U3–3314
► Error message
Document jam. Remove jam.
Document jam. Remove jam.
► Symptom
A document jam was detected in the ADF unit.
► Troubleshooting method
1) Remove the jammed paper from ADF unit.
2) If the error persists, turn the machine off then on.
3) If the document jam occurs continually, open the ADF cover-top. Check if the ADF pick up roller is contaminated
or worn out. Clean or replace it.
4) If the pick up roller is OK, check the followings.
a) Check if the ADF motor is working normally.

b) Check if the connector on the ADF joint board is connected correctly.
5) If the problem persists, replace the ADF unit.

► Error Code
U3–4110
► Error message
Scanner Door Open
► Symptom
ADF or ADF top cover is opened.
► Troubleshooting method
1) Close the ADF unit.
2) Close the ADF top cover.

4-42

4. Alignment and Troubleshooting

4.2.3. Image quality problem
1) Vertical Black Line and Band
Description : Straight thin black vertical line occurs in the printed image.

Check and cause
•

Damaged develop roller in the toner cartridge.
Deformed Doctor-blade or cleaning-blade.

•

Scratched surface of the charge roller in the toner
cartridge.

Partly depression or deformation on the surface of the
transfer roller.

Solution
Replace the toner cartridge.

Replace the transfer roller.

2) Vertical White Line
Description : White vertical voids occurs in the printed image.

Check and cause

Solution

Foreign matter stucks onto the window of internal lenses of
LSU mirror.

Clean the LSU window with recommended cleaner (IPA).
Clean the window with a clean cotton swab.

The life of the toner cartridge has been expired

Replace the toner cartridge.

Some foreign substances are on the window of the toner
cartridge frame.

Remove the foreign matter of the exposure window.

If the fuser is defective, voids occur periodically at the top
of a black image.

Reinstall the fuser unit.

4-43

4. Alignment and Troubleshooting

3) Horizontal Black Band
Description : Dark of blurry horizontal stripes occur in the printing periodically.

Check and cause

Solution

Bad contacts of the voltage terminals to toner cartridge.

Clean each voltage terminal of the Charge, Developing
and Transfer roller. (remove the toner particles and paper
particles)

The rollers of developer may be stained.

Replace the toner cartridge.

— OPC Drum = 62.9 mm
— Charge Roller = 26.7 mm
— Developing Roller = 33.7 mm

4) Black and White spot
Description : Dark or blurry black spots occur periodically in the printing.

4-44

Check and cause

Solution

If dark or blurry black spots occur periodically, the rollers in
the toner cartridge may be contaminated with foreign matte
or paper particles. (Charge roller : 26.7 mm interval / OPC
drum : 62.9 mm interval)

Clean each voltage terminal of the Charge, Developing
roller and Transfer roller. (remove the toner particles and
paper particles)

If faded areas or voids occur in a black image at intervals of
62.9 mm, the OPC drum surface is damaged.

Replace the toner cartridge.

If a black image is partially broken, the transfer voltage is
abnormal or the transfer roller’s life has expired.

•

If the transfer roller’s life is expired, replace it.

•

Clean the inside of the set against the paper particles
and foreign matter in order not to cause the trouble.

4. Alignment and Troubleshooting

5) Light image
Description : The printed image is light, with no ghost.

Check and cause

Solution

Toner cartridge life is expired.

Replace the toner cartridge.

HVPS terminal is contaminated.

Clean the contaminated terminal.

The output from the HVPS is abnormal.

Replace the HVPS board.

6) Dark or Black page
Description : The printed image is dark or black.

Check and cause

Solution

Check if the high voltage terminal is contaminated.

Clean the high voltage terminal.

The charging roller is defective.

Replace the toner cartridge.

The output from the HVPS is abnormal.

Replace the HVPS board.

4-45

4. Alignment and Troubleshooting

7) Uneven Density
Description : Print density is uneven between left and right.

Check and cause

Solution

•

The pressure force on the left and right springs of the
transfer roller is not even.

1) Remove the transfer roller Assy.

•

The springs are damaged.

3) Replace the transfer roller Assy.

•

The transfer roller is improperly installed.

The toner level is not even on the toner cartridge roller due
to the bad doctor blade.

2) Check if the transfer roller Assy has any wrong part.

Replace the toner cartridge.

8) Background
Description : Light dark background appears in whole area of the printing.

4-46

Check and cause

Solution

Does recycle paper be used?

Use the proper papers.

The life of the toner cartridge has been expired

Replace the toner cartridge.

The output from the HVPS is abnormal.

Replace the HVPS board.

4. Alignment and Troubleshooting

9) Ghost
Description : Ghost occurs at 62.9 mm intervals of the OPC drum.

Check and cause

Solution

The high voltage terminal is contaminated.

Clean the high voltage terminals.

The life of the toner cartridge has been expired

Replace the toner cartridge.

The life of the transfer roller has been expired.

Replace the transfer roller.

10) Stains on back of page
Description : The back of the page is stained.

Check and cause

Solution

Transfer roller is contaminated.

Replace the transfer roller.

4-47

4. Alignment and Troubleshooting

11) Blank page
Description : The back of the page is stained.

Check and cause

Solution

The ground contact of the toner cartridge is bad.

Clean the ground terminal of the toner cartridge. If the
problem persists, replace the toner cartridge.

LSU is defective.

Replace the LSU.

The connection between the main board and HVPS board
is bad.

Reconnect the harness. If the main board or HVPS board
is defective, replace it.

12) Partial image void
Description : The partial void occurs in the printed page.

Check and cause

Solution

The printer is not installed on flat ground.

Install the printer on flat ground. Print 10 sample pages for
test.

The developer circulation in the toner cartridge is bad.

1) Shake the toner cartridge 2~3 times from right to left.
Reinstall the toner cartridge. Print 10 sample pages
for test.
2) If the problem persists, replace the toner cartridge.

The contact between toner cartridge and transfer roller is
bad.

4-48

Check if the toner cartridge and transfer roller are installed
properly.

4. Alignment and Troubleshooting

4.2.4. Other errors
1) Multi-feeding

• Description : Multiple sheet of paper are fed at once.
Check and cause

Solution

Pick clutch does not work properly.

Replace the defective clutch if necessary.

Pick up roller is worn out or contaminated.

Clean or replace the pick up roller.

2) No-Power

• Description : When system power is turned on, LED and LCD on the operator panel do not come on.
Check and cause

Solution

The connection between main board and OPE board is bad.

Reconnect or replace the harness.

HVPS/SMPS output is abnormal.

Replace the HVPS/SMPS board.

4-49

5. System Diagram

5. System Diagram
5.1. Block Diagram (4 in 1)
S P E AKE R

Ha n d s e t
(3 4 2 1 F H / 7 6 0 P O n ly)

2 Lin e LC D

LS U

F AX

O P E MIC O M
S TM8 S 1 0 3

No t Ue s d S F -7 6 0 P
ADF
MO TO R

MAIN
C o n t ro lle r

S MPS & HVP S
TO P C o ve r
Mic ro S witc h

16P

30P
12P

MO DE M
C O NE XE NT

3 .3 V

+2 4 V

ADF MO TO R DR IVE R
A4 9 8 4 S LP TR

DDR 2 S DR AM

2 4 VS
3 .3 V

NT5 TU3 2 M1 6 C G -3 C

(F W: 1 2 8 MB)
(F / 7 6 0 P : 6 4 MB)
AF E
LAF E 1 0 0 1

24V
S E R IAL F la s h
(O S )
W2 5 Q 6 4
8 MB
DE V

F US E R C o n tro l
R e la y C o n tro l
HVP S C o n tro l

MHV
S u p p ly

INLET

F US E R
C O NTR O L
THV

12P

C h o ru s 3 _ Ne xt
C o re : 4 3 3 MHz
S YS TE M : 1 5 0 MHz
DDR : 3 0 0 MHz
AR M1 1 7 6

OP C

D
DR UM

ADF _ P _ DE T
ADF _ P _ P O S

3
2
1

12
11
10
9
8
7
6
5
4
3
2
1

4
3
2
1

2 5 MHz

S C X-3 4 2 1 F W O n ly

S E R IAL F la s h
(F AX B/U)
W2 5 Q 6 4
8 MB

ADF _ C _ S E NS

C IS M

S C AN MO TO R DR IVE R
A4 9 8 4 S LP TR

EEP ROM
M2 4 5 1 2 X 1 E A
6 4 KB

1
2
3
4
5
6
7
8
9
10
11
12

M
T
S TE P

S CAN
HOME

OP E

M
T
S TE P

NE TWO R K
AC 2 0 1 A1 KMLG

US B
C LK

C
R
U
M

US B De vic e

E n g in e MO TO R DR IVE R
A4 9 8 4 S LP TR

MC LK

C lo c k G e n e ra to r
AS M3 P 2 8 6 3 A

MC LK

T
DE VE LO P E R Un it

THE R MIS TO R
4P

11P

3P
Th e rm is to r 1

1
2
3
4
5
6
7
8
9
10
11

5
4
3
2
1

1
2
3
4

Th e rm o S ta t

F US E R Un it

S OL

P ic kUp
C lu tc h

Ma in
Mo to r

5-1

Wi-F i
S C X-3 4 2 1 F W O n ly

S TE P

Fe e d
S e ns or

Wid th
S e ns or

5. System Diagram

5.2. Block Diagram (3 in 1)
OP E
LS U

16P

TO P C o ve r
Mic ro S witc h

12P

3 .3 V

+2 4 V

2 4 VS
3 .3 V

DDR 2 S DR AM
(6 4 MB X 1 E A)

24V
S C AN MO TO R DR IVE R
A4 9 8 4 S LP TR

C h o ru s 3 _ Ne xt

DE V
MHV

INLET

THV

OP C

D
DR UM

F US E R C o n t ro l
R e la y C o n tro l
HVP S C o n tro l

S u p p ly

F US E R
C O NTR O L

C o re : 4 3 3 MHz
S YS TE M : 1 5 0 MHz
DDR : 3 0 0 MHz
AR M1 1 7 6

EEP ROM
M2 4 2 5 6 X 1 E A
(S C X-3 4 0 0 = 8 KB
S C X-3 4 0 5 W =3 2 KB)

4
3
2
1

3
2
1

M
T
S TE P

US B
C LK
MC LK

E n g in e MO TO R DR IVE R
A4 9 8 4 S LP TR

C
R
U
M

C IS M

AF E
LAF E 1 0 0 1

K4 T5 1 1 6 3 Q G -HC E 6

S P I F la s h
W2 5 Q 6 4
(S C X-3 4 0 0 = 4 MB
S C X-3 4 0 5 W = 8 MB)

12
11
10
9
8
7
6
5
4
3
2
1

S CAN
HOME

MAIN
C o n t ro lle r

S MP S &HVP S

O P E MIC O M
P T6 9 6 1

7 -S e g m e n t

C lo c k
G e n e ra to r
AS M3 P 2 8 6 3 A

US B De vic e

VC LK

T
DE VE LO P E R Un it

THE R MIS TO R
4P

11P

3P
Th e rm is to r 1

1
2
3
4
5
6
7
8
9
10
11

5
4
3
2
1

1
2
3
4

Th e rm o S ta t

F US E R Un it

S OL

P ic kUp
C lu tc h

Ma in
Mo to r

Wi-F i
S C X-3 4 0 5 W O n ly

S TE P

Fe e d
S e ns or

Wid th
S e ns or

5-2

5. System Diagram

5.3. Connection Diagram (4 in 1)
S P E AKE R

Ha n d s e t
(3 4 2 1 F H / 7 6 0 P O n ly)

OP E
2 Lin e LC D

F AX

O P E MIC O M
S TM8 S 1 0 3

No t Ue s d S F -7 6 0 P

1
2
3
4
5
6
7
8
9

1
2
3
4
5

ADF
MO TO R

6
7
8

1
2
3
4
5

LS U

M
T
S TE P

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

CN12

MAIN
C o n t ro lle r
DDR 2 S DR AM

C o re : 4 3 3 MHz
AR M9

S C AN MO TO R DR IVE R
A4 9 8 4 S LP TR
2 5 MHz

S E R IAL F la s h
W2 5 Q 6 4
8 MB
S

NE TWO R K
AC 2 0 1 A1 KMLG

MC LK

C lo c k
G e n e ra to r
AS M3 P 2 8 6 3 A

F LAT MO TO R DR IVE R
A4 9 8 4 S LP TR
VC LK

C N7
S E NS O R

1
2
3
4
5

P IC KUP
C LUTC H

1
2

1
2
3
4

CN16
FUS ER

1 F US E R _ THE R M1
2
3 THE R MIS TO R 2

OUT1A
OUT1B
OUT2A
OUT2B

C N5
MO TO R

3.3V_LS U
3.3V_LS U
nS ENS_P_ WIDTH
nS ENS_P_F EED
GND

C N9

T
DE VE LO P E R Un it

C N1 4
WLAN

3.3V
WLAN_S P I1_MOS I
GND
WLAN_S P I1_Ns s 0
N.C
WLAN_S P I1_EINT
WLAN_S P I1_MIS O
GND
WLAN_S P I1_S CK
GND
3.3V

3 .3 V_ C R UM
S DA1 _ C R UM
S C L1 _ C R UM
G ND

ADF _ C _ S E NS
ADF _ P _ DE T
ADF _ P _ P O S

3
2
1

O UT1 A
O UT1 B
O UT2 A
O UT2 B

LE D2
3 .3 V
G ND
G ND
R DC T_ R
R D+
TDC T_ T
TD+
G ND
G ND
LE D1
3 .3 V
VB US
DM1
DP 1
G ND

1
2
3
4
5
6
7
8
9
10
11
12
13
14

1
2
3
4

1
2
3
4
5
6
7
8
9
10
11
12

12
11
10
9
8
7
6
5
4
3
2
1

S C AN
MO TO R

4
3
2
1

C IS M

M
T
S TE P

S C X-3 4 2 1 F W
O n ly

1
2
3
4

1
2
3
4
5
6
7
8
9
10
11

4
3
2
1

CN3
CRUM

DR UM

C
R
U
M

24VS
P ICKUP _CLUTCH

CIS

C h o ru s 3 _ Ne xt

EEP ROM
M2 4 5 1 2 X 1 E A
6 4 KB

OP C

CN10

AF E
LAF E 1 0 0 1

MHV

THV

AF E _ S IG
S C AN_ C O NTR O L1
G ND
C IS _ 3 .3 V
C IS _ O F F S E T
C IS _ S P
C IS _ C LK
C IS A_ 6 .6 V
C IS _ B LE D
C IS _ G LE D
C IS _ R LE D
G ND

1 6 6 MHz

S P I F la s h
W2 5 Q 6 4
8 MB

S u p p ly

3 . 3 V_ S E NS O R
1
2
G ND
n S C ANNE R _ HO ME 3

NT5 TU3 2 M1 6 C G -3 C

(F W: 1 2 8 MB)
(F : 6 4 MB)

1
2
3
4
5
6
7
8
9
10
11
12

ADF MO TO R DR IVE R
A4 9 8 4 S LP TR

CN13

Fu s e r_ON
+2 4 V
G ND
+2 4 V
R E LAY_ AC _ O N
+2 4 V
G ND
G ND
2 4 VS
G ND
P WM_ DE V_ VP P
P WM_ THV
n DE V_ E N
+3 .3 V
P WM_ DE V_ AC
3 .3 V_ C O VE R
P WM_ DE V_ DC
n THV_ E N
P WM_ MHV
THV_ R E AD

CN5
NETWORK I/F

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

CN15
US B
DEVICE

CN
MAIN Controlle r I/F

20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

CN8
SMP S & HVP S I/F

DE V

F u s e r_ O N
+2 4 V
G ND
+2 4 V
R E LAY_ AC _ O N
+2 4 V
G ND
G ND
2 4 VS
G ND
P WM_ DE V_ VP P
P WM_ THV
n DE V_ E N
+3 .3 V
P WM_ DE V_ AC
3 .3 V_ C O VE R
P WM_ DE V_ DC
n THV_ E N
P WM_ MHV
THV_ R E AD

CN11

MO DE M
C O NE XE NT

O P E I/F

12
11
10
9
8
7
6
5
4
3
2
1

S CAN
HOME

C N1 9

LS U I/F

Sc a n Home

C N5

C N1 6
C O NE XANT MO DE M I/F

n ADF _ P _ DE T
G ND
n ADF _ C O VE R _ S E NS
n ADF _ P _ P O S
G ND
3 . 3 V P /U
3 . 3 V P /U
3 . 3 V P /U
O UT1 A
O UT1 B
O UT2 A
O UT2 B

FLAT MOTOR

LD_P OWER1
nS H_LS U_1
nLDON_LS U
GND
VDO_1_N
VDO_1_P
GND
Ns ync
3.3V_LS U

C o ve r o p e n
S /W

ADF MOTOR I/F

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
24VS
GND
nLS U_MOT_EN
nREADY_LS U
CLK_LS U_MOT

3 . 3 VS

GND
LED_P OWER
nP OWER_S W
/ nKEY_P OWER_SW
nRS T_P ANEL
P ANEL_TXD
nS CANNER_HOME
nKEY_P OWER_S W
NC

3 .3 V

GND
5V
DATA<7>
DATA<6>
DATA<5>
DATA<4>
DATA<3>
DATA<2>
DATA<1>
DATA<0>
GND
ADDR<0>
ADDR<1>
ADDR<2>
ADDR<3>
ADDR<4>
ADDR<5>
ADDR<6>
GND
nHOOK_DET
nCS _MODEM
nRD
nWR
N.C
nRS T_MODE
M
nINT_MODEM
KEYCLICK
3.3V
3.3V
GND

1
2
3

4
5
6
7
8

S MPS & HVPS

Th e rm is to r 1

S OL

F US E R Un it

P ic kUp
C lu tc h

Wi-F i
S C X-3 4 2 1 F W O n ly

S TE P

Ma in
Mo to r

1
2
3
4
5
6
7
8
9
10
11

5
4
3
2
1

1
2
3
4

Th e rm o S ta t

Fe e d
S e ns or

Wid th
S e ns or

INLE T

5-3

5. System Diagram

5.4. Connection Diagram (3 in 1)
OP E
O P E MIC O M
P T6 9 6 1

1
2
3
4
5

6
7
8

7 -S e g m e n t

LS U
1
2
3
4
5
6
7
8
9

1
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1
2
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5
6
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14
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1
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7
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5-4

6. Reference Information

6. 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 test pages and Wireless Network information definition is also included.

6.1. Tool for Troubleshooting
The following tools are recommended safe and easy troubleshooting as described in this service manual.
DVM (Digital Volt Meter)

Cleaning Equipments

Standard : Indicates more than 3 digits.

Standard : An IPA (Isopropyl Alcohol) dry wipe tissue or a
gentle neutral detergent and lint-free cloth.

Driver

Vacuum Cleaner

Standard : “-” type, “+” type (M3 long, M3 short, M2 long,
M2 short).

Tweezers

Spring Hook

Standard : For general home use, small type.

Standard : For general use

Cotton Swab

Software (Driver) installation CD ROM

Standard : For general home use, for medical service.

6-1

6. Reference Information

6.2. Glossary
The following glossary helps you get familiar with the product by understanding the terminologies commonly used with
printing as well as mentioned in this user’s guide and service manual.
802.11

802.11 is a set of standards for wireless local area network (WLAN) communication, developed by
the IEEE LAN/MAN Standards Committee (IEEE 802).

802.11b/g/n

802.11b/g/n can share same hardware and use the 2.4 GHz band. 802.11b supports bandwidth up to 11
Mbps, 802.11n supports bandwidth up to 150 Mbps. 802.11b/g/n devices may occasionally suffer
interference from microwave ovens, cordless telephones, and Bluetooth devices.

Access point

Access Point or Wireless Access Point (AP or WAP) is a device that connects wireless communication
devices together on wireless local area networks (WLAN), and acts as a central transmitter and
receiver of WLAN radio signals.

ADF

An Automatic Document Feeder (ADF) is a scanning unit that will automatically feed an original
sheet of paper so that the machine can scan some amount of the paper at once.

AppleTalk

AppleTalk is a proprietary suite of protocols developed by Apple, Inc for computer networking. It
was included in the original Macintosh (1984) and is now deprecated by Apple in favor of TCP/IP
networking.

BIT Depth

A computer graphics term describing the number of bits used to represent the color of a single pixel in
a bitmapped image. Higher color depth gives a broader range of distinct colors. As the number of bits
increases, the number of possible colors becomes impractically large for a color map. 1-bit color is
commonly called as monochrome or black and white.

BMP

A bitmapped graphics format used internally by the Microsoft Windows graphics subsystem (GDI),
and used commonly as a simple graphics file format on that platform.

BOOTP

Bootstrap Protocol. A network protocol used by a network client to obtain its IP address automatically.
This is usually done in the bootstrap process of computers or operating systems running on them. The
BOOTP servers assign the IP address from a pool of addresses to each client. BOOTP enables 'diskless
workstation' computers to obtain an IP address prior to loading any advanced operating system.

CCD

Charge Coupled Device (CCD) is a hardware which enables the scan job. CCD Locking mechanism is
also used to hold the CCD module to prevent any damage when you move the machine.

Collation

Collation is a process of printing a multiple-copy job in sets. When collation is selected, the device
prints an entire set before printing additional copies.

Control Panel

A control panel is a flat, typically vertical, area where control or monitoring instruments are displayed.
They are typically found in front of the machine.

Coverage

It is the printing term used for a toner usage measurement on printing. For example, 5% coverage
means that an A4 sided paper has about 5% image or text on it. So, if the paper or original has
complicated images or lots of text on it, the coverage will be higher and at the same time, a toner
usage will be as much as the coverage.

CSV

Comma Separated Values (CSV). A type of file format, CSV is used to exchange data between
disparate applications. The file format, as it is used in Microsoft Excel, has become a de facto standard
throughout the industry, even among non-Microsoft platforms.

DADF

A Duplex Automatic Document Feeder (DADF) is a scanning unit that will automatically feed and
turn over an original sheet of paper so that the machine can scan on both sides of the paper.

Default

The value or setting that is in effect when taking a printer out of its box state, reset, or initialized.

DHCP

A Dynamic Host Configuration Protocol (DHCP) is a client-server networking protocol. A DHCP
server provides configuration parameters specific to the DHCP client host requesting, generally,
information required by the client host to participate on an IP network. DHCP also provides a
mechanism for allocation of IP addresses to client hosts.

DIMM

Dual Inline Memory Module (DIMM), a small circuit board that holds memory. DIMM stores all
the data within the machine like printing data, received fax data.

6-2

6. Reference Information

DLNA

The Digital Living Network Alliance (DLNA) is a standard that allows devices on a home network to
share information with each other across the network.

DNS

The Domain Name Server (DNS) is a system that stores information associated with domain names in
a distributed database on networks, such as the Internet.

Dot Matrix Printer

A dot matrix printer refers to a type of computer printer with a print head that runs back and forth
on the page and prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a
typewriter.

DPI

Dots Per Inch (DPI) is a measurement of resolution that is used for scanning and printing. Generally,
higher DPI results in a higher resolution, more visible detail in the image, and a larger file size.

DRPD

Distinctive Ring Pattern Detection. Distinctive Ring is a telephone company service which enables a
user to use a single telephone line to answer several different telephone numbers.

Duplex

A mechanism that will automatically turn over a sheet of paper so that the machine can print (or
scan) on both sides of the paper. A printer equipped with a Duplex Unit can print on both sides of
paper during one print cycle.

Duty Cycle

Duty cycle is the page quantity which does not affect printer performance for a month. Generally the
printer has the lifespan limitation such as pages per year. The lifespan means the average capacity
of print-outs, usually within the warranty period. For example, if the duty cycle is 48,000 pages per
month assuming 20 working days, a printer limits 2,400 pages a day.

ECM

Error Correction Mode (ECM) is an optional transmission mode built into Class 1 fax machines
or fax modems. It automatically detects and corrects errors in the fax transmission process that
are sometimes caused by telephone line noise.

Emulation

Emulation is a technique of one machine obtaining the same results as another. An emulator
duplicates the functions of one system with a different system, so that the second system behaves like
the first system. Emulation focuses on exact reproduction of external behavior, which is in contrast
to simulation, which concerns an abstract model of the system being simulated, often considering
its internal state.

Ethernet

Ethernet is a frame-based computer networking technology for local area networks (LANs). It defines
wiring and signaling for the physical layer, and frame formats and protocols for the media access
control (MAC)/data link layer of the OSI model. Ethernet is mostly standardized as IEEE 802.3. It
has become the most widespread LAN technology in use during the 1990s to the present.

EtherTalk

A suite of protocols developed by Apple Computer for computer networking. It was included in the
original Macintosh (1984) and is now deprecated by Apple in favor of TCP/IP networking.

FDI

Foreign Device Interface (FDI) is a card installed inside the machine to allow a third party device
such as a coin operated device or a card reader. Those devices allow the pay-for-print service
on your machine.

FTP

A File Transfer Protocol (FTP) is a commonly used protocol for exchanging files over any network
that supports the TCP/IP protocol (such as the Internet or an intranet).

Fuser Unit

The part of a laser printer that fuses the toner onto the print media. It consists of a heat roller and
a pressure roller. After toner is transferred onto the paper, the fuser unit applies heat and pressure
to ensure that the toner stays on the paper permanently, which is why paper is warm when it comes
out of a laser printer.

Gateway

A connection between computer networks, or between a computer network and a telephone line. It is
very popular, as it is a computer or a network that allows access to another computer or network.

Grayscale

A shades of gray that represent light and dark portions of an image when color images are converted
to grayscale; colors are represented by various shades of gray.

Halftone

An image type that simulates grayscale by varying the number of dots. Highly colored areas consist of
a large number of dots, while lighter areas consist of a smaller number of dots.

HDD

Hard Disk Drive (HDD), commonly referred to as a hard drive or hard disk, is a non-volatile storage
device which stores digitally-encoded data on rapidly rotating platters with magnetic surfaces.

6-3

6. Reference Information

IEEE

The Institute of Electrical and Electronics Engineers (IEEE) is an international non-profit, professional
organization for the advancement of technology related to electricity.

IEEE 1284

The 1284 parallel port standard was developed by the Institute of Electrical and Electronics Engineers
(IEEE). The term "1284-B" refers to a specific connector type on the end of the parallel cable that
attaches to the peripheral (for example, a printer).

Intranet

A private network that uses Internet Protocols, network connectivity, and possibly the public
telecommunication system to securely share part of an organization's information or operations with
its employees. Sometimes the term refers only to the most visible service, the internal website.

IP address

An Internet Protocol (IP) address is a unique number that devices use in order to identify and
communicate with each other on a network utilizing the Internet Protocol standard.

IPM

The Images Per Minute (IPM) is a way of measuring the speed of a printer. An IPM rate indicates the
number of single-sided sheets a printer can complete within one minute.

IPP

The Internet Printing Protocol (IPP) defines a standard protocol for printing as well as managing print
jobs, media size, resolution, and so forth. IPP can be used locally or over the Internet to hundreds
of printers, and also supports access control, authentication, and encryption, making it a much more
capable and secure printing solution than older ones.

IPX/SPX

IPX/SPX stands for Internet Packet Exchange/Sequenced Packet Exchange. It is a networking
protocol used by the Novell NetWare operating systems. IPX and SPX both provide connection
services similar to TCP/IP, with the IPX protocol having similarities to IP, and SPX having similarities
to TCP. IPX/SPX was primarily designed for local area networks (LANs), and is a very efficient
protocol for this purpose (typically its performance exceeds that of TCP/IP on a LAN).

ISO

The International Organization for Standardization (ISO) is an international standard-setting body
composed of representatives from national standards bodies. It produces world-wide industrial and
commercial standards.

ITU-T

The International Telecommunication Union is an international organization established to standardize
and regulate international radio and telecommunications. Its main tasks include standardization,
allocation of the radio spectrum, and organizing interconnection arrangements between different
countries to allow international phone calls. A -T out of ITU-T indicates telecommunication.

ITU-T No. 1 chart

Standardized test chart published by ITU-T for document facsimile transmissions.

JBIG

Joint Bi-level Image Experts Group (JBIG) is an image compression standard with no loss of accuracy
or quality, which was designed for compression of binary images, particularly for faxes, but can
also be used on other images.

JPEG

Joint Photographic Experts Group (JPEG) is a most commonly used standard method of lossy
compression for photographic images. It is the format used for storing and transmitting photographs
on the World Wide Web.

LDAP

The Lightweight Directory Access Protocol (LDAP) is a networking protocol for querying and
modifying directory services running over TCP/IP.

LED

A Light-Emitting Diode (LED) is a semiconductor device that indicates the status of a machine.

MAC address

Media Access Control (MAC) address is a unique identifier associated with a network adapter. MAC
address is a unique 48-bit identifier usually written as 12 hexadecimal characters grouped in pairs (e.
g., 00-00-0c-34-11-4e). This address is usually hard-coded into a Network Interface Card (NIC) by its
manufacturer, and used as an aid for routers trying to locate machines on large networks.

MFP

Multi Function Peripheral (MFP) is an office machine that includes the following functionality in one
physical body, so as to have a printer, a copier, a fax, a scanner and etc.

Modified Huffman (MH) is a compression method for decreasing the amount of data that needs to be
transmitted between the fax machines to transfer the image recommended by ITU-T T.4. MH is a
codebook-based run-length encoding scheme optimized to efficiently compress white space. As most
faxes consist mostly of white space, this minimizes the transmission time of most faxes.

MMR

Modified Modified READ (MMR) is a compression method recommended by ITU-T T.6.

6-4

6. Reference Information

Modem

A device that modulates a carrier signal to encode digital information, and also demodulates such a
carrier signal to decode transmitted information.

Modified Read (MR) is a compression method recommended by ITUT T.4. MR encodes the first
scanned line using MH. The next line is compared to the first, the differences determined, and then the
differences are encoded and transmitted.

NetWare

A network operating system developed by Novell, Inc. It initially used cooperative multitasking to
run various services on a PC, and the network protocols were based on the archetypal Xerox XNS
stack. Today NetWare supports TCP/IP as well as IPX/SPX.

OPC

Organic Photo Conductor (OPC) is a mechanism that makes a virtual image for print using a laser
beam emitted from a laser printer, and it is usually green or rust colored and has a cylinder shape.
An imaging unit containing a drum slowly wears the drum surface by its usage in the printer, and
it should be replaced appropriately since it gets worn from contact with the cartridge development
brush, cleaning mechanism, and paper.

Originals

The first example of something, such as a document, photograph or text, etc, which is copied,
reproduced or translated to produce others, but which is not itself copied or derived from something
else.

OSI

Open Systems Interconnection (OSI) is a model developed by the International Organization for
Standardization (ISO) for communications. OSI offers a standard, modular approach to network
design that divides the required set of complex functions into manageable, self-contained, functional
layers. The layers are, from top to bottom, Application, Presentation, Session, Transport, Network,
Data Link and Physical.

PABX

A private automatic branch exchange (PABX) is an automatic telephone switching system within a
private enterprise.

PCL

Printer Command Language (PCL) is a Page Description Language (PDL) developed by HP as a
printer protocol and has become an industry standard. Originally developed for early inkjet printers,
PCL has been released in varying levels for thermal, dot matrix printer, and laser printers.

PDF

Portable Document Format (PDF) is a proprietary file format developed by Adobe Systems for
representing two dimensional documents in a device independent and resolution independent format.

PostScript(PS)

PostScript (PS) is a page description language and programming language used primarily in the
electronic and desktop publishing areas. - that is run in an interpreter to generate an image.

Printer Driver

A program used to send commands and transfer data from the computer to the printer.

Print Media

The media like paper, envelopes, labels, and transparencies which can be used in a printer, a scanner, a
fax or, a copier.

PPM

Pages Per Minute (PPM) is a method of measurement for determining how fast a printer works,
meaning the number of pages a printer can produce in one minute.

PRN file

An interface for a device driver, this allows software to interact with the device driver using standard
input/output system calls, which simplifies many tasks.

Protocol

A convention or standard that controls or enables the connection, communication, and data transfer
between two computing endpoints.

PSTN

The Public-Switched Telephone Network (PSTN) is the network of the world's public circuit-switched
telephone networks which, on industrial premises, is usually routed through the switchboard.

RADIUS

Remote Authentication Dial In User Service (RADIUS) is a protocol for remote user authentication
and accounting. RADIUS enables centralized management of authentication data such as usernames
and passwords using an AAA (authentication, authorization, and accounting) concept to manage
network access.

Resolution

The sharpness of an image, measured in Dots Per Inch (DPI). The higher the dpi, the greater the
resolution.

SMB

Server Message Block (SMB) is a network protocol mainly applied to share files, printers, serial ports,
and miscellaneous communications between nodes on a network. It also provides an authenticated
Interprocess communication mechanism.

6-5

6. Reference Information

SMTP

Simple Mail Transfer Protocol (SMTP) is the standard for e-mail transmissions across the Internet.
SMTP is a relatively simple, text based protocol, where one or more recipients of a message are
specified, and then the message text is transferred. It is a client server protocol, where the client
transmits an email message to the server.

SSID

Service Set Identifier (SSID) is a name of a wireless local area network (WLAN). All wireless devices
in a WLAN use the same SSID in order to communicate with each other. The SSIDs are case-sensitive
and have a maximum length of 32 characters.

Subnet Mask

The subnet mask is used in conjunction with the network address to determine which part of the
address is the network address and which part is the host address.

TCP/IP

The Transmission Control Protocol (TCP) and the Internet Protocol (IP); the set of communications
protocols that implement the protocol stack on which the Internet and most commercial networks run.

TCR

Transmission Confirmation Report (TCR) provides details of each transmission such as job status,
transmission result and number of pages sent. This report can be set to print after each job or only
after failed transmissions.

TIFF

Tagged Image File Format (TIFF) is a variable-resolution bitmapped image format. TIFF describes
image data that typically come from scanners. TIFF images make use of tags, keywords defining the
characteristics of the image that is included in the file. This flexible and platform-independent format
can be used for pictures that have been made by various image processing applications.

Toner Cartridge

A kind of bottle or container used in a machine like a printer which contains toner. Toner is a powder
used in laser printers and photocopiers, which forms the text and images on the printed paper. Toner
can be fused by a combination of heat/pressure from the fuser, causing it to bind to the fibers in
the paper.

TWAIN

An industry standard for scanners and software. By using a TWAINcompliant scanner with a
TWAIN-compliant program, a scan can be initiated from within the program. It is an image capture
API for Microsoft Windows and Apple Macintosh operating systems.

UNC Path

Uniform Naming Convention (UNC) is a standard way to access network shares in Window NT and
other Microsoft products. The format of a UNC path is: \\\\

URL

Uniform Resource Locator (URL) is the global address of documents and resources on the Internet.
The first part of the address indicates what protocol to use, the second part specifies the IP address or
the domain name where the resource is located.

USB

Universal Serial Bus (USB) is a standard that was developed by the USB Implementers Forum, Inc., to
connect computers and peripherals. Unlike the parallel port, USB is designed to concurrently connect
a single computer USB port to multiple peripherals.

Watermark

A watermark is a recognizable image or pattern in paper that appears lighter when viewed by
transmitted light. Watermarks were first introduced in Bologna, Italy in 1282; they have been used by
papermakers to identify their product, and also on postage stamps, currency, and other government
documents to discourage counterfeiting.

WEP

Wired Equivalent Privacy (WEP) is a security protocol specified in IEEE 802.11 to provide the same
level of security as that of a wired LAN. WEP provides security by encrypting data over radio so that
it is protected as it is transmitted from one end point to another.

WIA

Windows Imaging Architecture (WIA) is an imaging architecture that is originally introduced in
Windows Me and Windows XP. A scan can be initiated from within these operating systems by
using a WIAcompliant scanner.

WPA

Wi-Fi Protected Access (WPA) is a class of systems to secure wireless (Wi-Fi) computer networks,
which was created to improve upon the security features of WEP.

WPA-PSK

WPA-PSK (WPA Pre-Shared Key) is special mode of WPA for small business or home users. A
shared key, or password, is configured in the wireless access point (WAP) and any wireless laptop or
desktop devices. WPA-PSK generates a unique key for each session between a wireless client and the
associated WAP for more advanced security.

6-6

6. Reference Information

WPS

The Wi-Fi Protected Setup (WPS) is a standard for establishing a wireless home network. If your
wireless access point supports WPS, you can configure the wireless network connection easily
without a computer.

XPS

XML Paper Specification (XPS) is a specification for a Page Description Language (PDL) and a new
document format, which has benefits for portable document and electronic document, developed
by Microsoft. It is an XML-based specification, based on a new print path and a vector-based
device-independent document format.

6-7

6. Reference Information

6.3. The Sample Pattern for the Test
The life of the toner cartridge and the printing speed are measured using the pattern shown below.

6-8

6. Reference Information

6.4. Selecting a location
Select a level, stable place with adequate space for air circulation. Allow extra space for opening covers and trays.
The area should be well-ventilated and away from direct sunlight or sources of heat, cold, and humidity. Do not set the
machine close to the edge of your desk or table.

Clearance space

• Front: 326 mm (enough space so that the paper tray can be removed)
• Back: 100 mm (enough space for ventilation)
• Right: 100 mm (enough space for ventilation)
• Left: 100 mm (enough space for ventilation)

6-9

GSPN (GLOBAL SERVICE PARTNER NETWORK)
Area

Web Site

Europe, MENA,
CIS, Africa

https://gspn1.samsungcsportal.com

E.Asia, W.Asia,
China, Japan

https://gspn2.samsungcsportal.com

N.America, S.America

https://gspn3.samsungcsportal.com

This Service Manual is a property of Samsung Electronics
Co.,Ltd.
Any unauthorized use of Manual can be punished under
applicable International and/or domestic law.

www.s-manuals.com

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Samsung SCX 340x Series Service Manual. Www.s Manuals.com. Manual

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