Samsung ML 1660, ML 1665 Service Manual

Service Manual

1. Speed

• Up to 16 ppm in A4 (17 ppm in Letter)

2. Processor

• Jupiter4e 150 MHz

3. Printer Language

• GDI

The keynote of Product

Laser Printer

ML-1660/1665

4. Memory

• 8 MB

5. Interfaces

• Compatible with USB 2.0

6. Toner cartridge

• Initial : 0.7K

• Sales : 1.5K

ⓒ

Samsung Electronics Co.,Ltd. December. 2009

Printed in Korea.

VERSION NO. : 1.00 CODE : 1660-00000E

chapter 1 Precautions

1.1 Safety Warning …………………………………………………… 1-1

1.2 Caution for safety ………………………………………………… 1-2

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 / Disassembly Precautions ……………………… 1-3

1.2.5 Disregarding this warning may cause bodily injury ……… 1-4

1.3 ESD Precautions ………………………………………………… 1-5

Contents

chapter 2 Product Overview

2.1 Product Specications …………………………………………… 2-1

2.1.1 Product Overview …………………………………………… 2-1

2.1.2 Specications ………………………………………………… 2-2

2.1.3 Model Comparison Table …………………………………… 2-7

2.2 System Overview ………………………………………………… 2-8

2.2.1 Front View …………………………………………………… 2-8

2.2.2 Rear View …………………………………………………… 2-9

2.2.3 System Layout ……………………………………………… 2-10

2.2.4 Engine H/W Specications ………………………………… 2-17

2.2.5 Engine F/W Contol Algorithm ……………………………… 2-23

2.2.6 S/W Descriptions …………………………………………… 2-25

chapter 3 Maintenance and Disassembly

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 ………………………………… 3-1

Contents

3.2 Screws used in the printer ……………………………………… 3-2

3.3 Cover ……………………………………………………………… 3-3

3.3.1 Left/Right cover ……………………………………………… 3-3

3.3.2 Rear bracket ………………………………………………… 3-3

3.3.3 Cover-open ………………………………………………… 3-4

3.3.4 Top/Front cover ……………………………………………… 3-4

3.4 Main PBA ………………………………………………………… 3-5

3.5 SMPS/HVPS board ……………………………………………… 3-6

3.6 Fuser unit ………………………………………………………… 3-7

3.7 LSU ………………………………………………………………… 3-8

3.8 Drive unit ………………………………………………………… 3-9

3.9 Step motor ………………………………………………………… 3-10

3.10 Pick up roller …………………………………………………… 3-11

chapter 4 Alignment and Troubleshooting

4.1 Alignment and Adjustments ……………………………………… 4-1

4.1.1 Control Panel ………………………………………………… 4-1

4.1.2 Understanding the LEDs …………………………………… 4-2

4.1.3 JAM Removal ……………………………………………… 4-3

4.1.4 Printing a report ……………………………………………… 4-5

4.1.5 Periodic Defective Image …………………………………… 4-8

4.1.6 Firmware upgrade …………………………………………… 4-9

4.1.7 Using the smart panel program …………………………… 4-10

4.2 Troubleshooting…………………………………………………… 4-12

4.2.1 Procedure of Checking the Symptoms …………………… 4-12

4.2.2 Bad discharge ……………………………………………… 4-15

4.2.3 Malfunction …………………………………………………… 4-19

4.2.4 Bad image …………………………………………………… 4-24

chapter 5 System Diagram

5.1 Block Diagram …………………………………………………… 5-1

5.2 Connection Diagram……………………………………………… 5-2

chapter 6 Reference Information

6.1 Tool for Troubleshooting ………………………………………… 6-1

6.2 Acronyms and Abbreviations …………………………………… 6-2

6.2.1 Acronyms …………………………………………………… 6-2

6.2.2 Service Parts ………………………………………………… 6-4

Contents

6.3 A4 ISO 19798 Standard Pattern ………………………………… 6-8

6.3.1 A4 ISO 19752 Standard Pattern …………………………… 6-8

6.4 Selecting a location ……………………………………………… 6-9

attached Exploded Views & Parts List

Precautions

1. Precautions

In order to prevent accidents and damages to the equipment please read the precautions listed below
carefully before servicing the product and follow them closely.

1.1 Safety warning

(1) Only to be serviced by a factory trained service technician.

High voltages and lasers inside this product are dangerous. This product should only be serviced by a
factory trained service technician.

(2) Use only Samsung replacement parts.

There are no user serviceable parts inside the product. Do not make any unauthorized changes or
additions to the product as these could cause the product to malfunctions and create an electric shocks

or re hazards.

(3) Laser Safety Statement

The product is certied in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1
Subchapter J for Class 1(1) laser products, and elsewhere, it is certied as a Class I laser product con­forming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The

laser system and product are designed so there is never any human access to laser radiation above a

Class I level during normal operation, user maintenance, or prescribed service condition.

Warning >> Never operate or service the product with the protective cover removed from Laser/Scanner

assembly. The reected beam, although invisible, can damage your eyes.

When using this product, these basic safety pre-cautions should always be followed to reduce
risk of re, electric shock, and personal injury.

Service Manual

1-1

Samsung Electronics

Precautions

Service Manual

1-2

Samsung Electronics

1.2 Caution for safety

1.2.1 Toxic material

This product contains toxic materials that could cause illness if ingested.

(1) If the LCD control panel is damaged, it is possible for the liquid inside to leak. This liquid is toxic.

Contact with the skin should be avoided. Wash any splashes from eyes or skin immediately and contact
your doctor. If the liquid gets into the mouth or is swallowed, see a doctor immediately.

(2) Please keep imaging unit and toner cartridge away from children. The toner powder contained in the

imaging unit and toner cartridge may be harmful, and if swallowed, you should contact a doctor.

1.2.2 Electric shock and re safety precautions

Failure to follow the following instructions could cause electric shock or potentially cause a re.

(1) Use only the correct voltage, failure to do so could damage the product and potentially cause a re or

electric shock.

(2) Use only the power cable supplied with the product. Use of an incorrectly specied cable could cause the

cable to overheat and potentially cause a re.

(3) Do not overload the power socket, this could lead to overheating of the cables inside the wall and could

lead to a re.

(4) Do not allow water or other liquids to spill into the product, this can cause electric shock. Do not allow

paper clips, pins or other foreign objects to fall into the product, these could cause a short circuit leading
to an electric shock or re hazard.

(5) Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock.

When servicing the product, remove the power plug from the wall socket.

(6) Use caution when inserting or removing the power connector. When removing the power connector, grip it

rmly and pull. The power connector must be inserted completely, otherwise a poor contact could cause
overheating possibly leading to a re.

(7) Take care of the power cable. Do not allow it to become twisted, bent sharply around corners or wise

damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat
and cause a re. Exposed cables could cause an electric shock. Replace the damaged power cable
immediately, do not reuse or repair the damaged cable. Some chemicals can attack the coating on the
power cable, weakening the cover or exposing cables causing re and shock risks.

(8) Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should

be repaired immediately. Take care not to cut or damage the power cable or plugs when moving the
machine.

(9) Use caution during thunder or lightning storms. Samsung recommends that this machine be disconnected

from the power source when such weather conditions are expected. Do not touch the machine or the
power cord if it is still connected to the wall socket in these weather conditions.

(10) Avoid damp or dusty areas, install the product in a clean well ventilated location. Do not position the

machine near a humidier or in front of an air conditioner. Moisture and dust built up inside the machine
can lead to overheating and cause a re or cause parts to rust.

(11) Do not position the product in direct sunlight. This will cause the temperature inside the product to rise

possibly leading to the product failing to work properly and in extreme conditions could lead to a re.

(12) Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it

could make contact with a high voltage conductor inside the machine and cause an electric shock.

Precautions

Service Manual

1-3

Samsung Electronics

1.2.3 Handling precautions

The following instructions are for your own personal safety to avoid injury and so as not to damage the

product.

(1) Ensure the product is installed on a level surface, capable of supporting its weight. Failure to do so could

cause the product to tip or fall.

(2) The product contains many rollers, gears and fans. Take great care to ensure that you do not catch your

ngers, hair or clothing in any of these rotating devices.

(3) Do not place any small metal objects, containers of water, chemicals or other liquids close to the product

which if spilled could get into the machine and cause damage or a shock or re hazard.

(4) Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a

humidier or heater. Damage could be caused to the product in such areas.

(5) Do not place candles, burning cigarettes, etc on the product, These could cause a re.

1.2.4 Assembly / Disassembly precautions

Replace parts carefully and always use Samsung parts. Take care to note the exact location of parts and also

cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.
Please carry out the following procedures before dismantling the product or replacing any parts.

(1) Check the contents of the machine memory and make a note of any user settings. These will be erased if

the main board or network card is replaced.
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.
(3) Disconnect interface cables and power cables.

(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or

temperature rating are correct.

(5) When removing or re-tting any parts do not use excessive force, especially when tting screws into

plastic.
(6) Take care not to drop any small parts into the machine.

(7) Handling of the OPC Drum

- The OPC Drum can be irreparably damaged if it exposed to light.

Take care not to expose the OPC Drum either to direct sunlight or to uorescent or incandescent room
lighting. Exposure for as little as 5 minutes can damage the surface of the photoconductive properties
and will result in print quality degradation. Take extra care when servicing the product. Remove the OPC
Drum and store it in a black bag or other lightproof container. Take care when working with the Covers
(especially the top cover) open as light is admitted to the OPC area and can damage the OPC Drum.

- Take care not to scratch the green surface of OPC Drum Unit.

If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.

Precautions

Service Manual

1-4

Samsung Electronics

1.2.5 Disregarding this warning may cause bodily injury

(1) Be careful with the high temperature part.

The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to

cool down before disassembly.

(2) Do not put nger or hair into the rotating parts.

When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor,

fan, etc.). If do, you can get harm.

(3) When you move the printer.

This printer weighs 6kg including toner cartridge and cassette. Use safe lifting and handling techniques.

Use the lifting handles located on each side of the machine. Back injury could be caused if you do not lift

carefully.
(4) Ensure the printer is installed safely.

The printer weighs 6kg, ensure the printer is installed on a level surface, capable of supporting its weight.

Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the

printer.

(5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer

is stable.

Precautions

Service Manual

1-5

Samsung Electronics

1.3 ESD precautions

Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly

called “Electrostatically Sensitive (ES) Devices” or ESDs. Examples of typical ESDs are: integrated

circuits,some eld effect transistors, and semiconductor “chip” components.

The techniques outlined below should be followed to help reduce the incidence of component damage
caused by static electricity.

Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain

off any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a
commercially available wrist strap device, which should be removed for your personal safety reasons prior

to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface,

such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity

of the assembly.

3. Use only a grounded tip soldering iron to solder or desolder ESDs.

4. Use only an “anti-static” solder removal device. Some solder removal devices not classied as “anti-static”

can generate electrical charges sufcient to damage ESDs.

5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufcient to

damage ESDs.

6. Do not remove a replacement ESD from its protective packaging until immediately before installing it.

Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil,

or a comparable conductive material.

7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch

the protective material to the chassis or circuit assembly into which the device will be installed.

8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed,

until completely plugged or soldered into the circuit.

9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as

the brushing together of clothing fabric and lifting one’s foot from a carpeted oor, can generate static
electricity sufcient to damage an ESD.

Product spec and feature

2. Product spec and feature

2.1 Product Specications

2.1.1 Product Overview

1. Speed

• Up to 16 ppm in A4 (17 ppm in Letter)

2. Processor

• Jupiter4e 150 MHz

3. Printer Language

• GDI

ML- 1660

4. Memory

• 8 MB

5. Interfaces

• Compatible with USB 2.0

6. Toner cartridge

• Initial : 0.7K

• Sales : 1.5K

Service Manual

2-1

Samsung Electronics

Product spec and feature

Service Manual

2-2

Samsung Electronics

2.1.2 Specications

• Product Specications are subject to change without notice. See below for product specications.

2.1.2.1 General Print Engine

Items Specication

Engine Speed Simplex Up to 16 ppm in A4 (17 ppm in Letter)

Duplex Manual

Warmup time From Sleep ≤ 30 sec

FPOT From Ready ≤ 10 sec

From Sleep ≤ 30 sec

Resolution Up to 1200 x 600 dpi effective output

2.1.2.2 Controller & S/W

Items Specication

Processor Jupiter4e 150 MHz
Memory Std. 8 MB

Option N/A

Printer Languages GDI GDI

Fonts - Windows Fonts

Driver Default Driver SPL

Install SPL

Supporting OS Windows 2000/XP(32/64bits)/Vista(32/64bits)/2003

Server(32/64bits)/2008 Server(32/64bits) / Win7 /2008 R2

Various Linux OS:

- Red Hat 8~9,

- Fedora Core 1~4

- Mandrake 9.2~10.1

- SuSE 8.2~9.2

Mac OS 10.3~10.6

WHQL Windows 2000/XP(32/64bits)/Vista(32/64bits)/2003

Server(32/64bits)/2008 Server(32/64bits) / Win7 /2008 R2

Compatibility Win 2000/XP(32/64bits)/2003 Server/Vista(32/64bits),2008

Wired Network Protocol N/A

Supporting OS N/A

Server(32/64bits)/ WIn7 /2008 R2

Product spec and feature

Items Specifi cation

Wireless Network Protocol N/A

Supporting OS N/A

Application Smart Panel SmartPanel for Windows/ Macintosh/LINUX

Printer Setting N/A

Network Management N/A

IP Setting N/A

Interface Parallel N/A

USB Compatible with USB 2.0

Wired Network N/A

Wireless Network N/A

User Interface LCD N/A

LED 2 LED

Key 2 key

2.1.2.3 Paper Handling

Items Specifi cation

Standard Capacity 150-sheet Tray@80g/㎡

Max. Capacity 150 sheets @ 80g/㎡

Printing Max. Size 216 x 356 mm (8.5" x 14")

Min. Size 76 x 183 mm (3.0" x 7.2")

Standard
Cassette Tray

Optional
Cassette Tray

Capacity 150 sheets @ 80g/㎡

Media sizes A4, A5, A6, ISO B5, JIS B5, Executive, Letter, O cio, Folio,

Legal,Custom

Media types Plain, Thin, Recycled, Thick, Archive

Media weight 16~32lb (60 to 120g/㎡)

Sensing Paper Empty

Capacity N/A

Media sizes N/A

Media types N/A

Media weight N/A

Sensing N/A

Output Stacking

Output Stacking Face-Down 100 sheets @ 75g/㎡(Base Line Paper : Samsung Premium/

Xerox4200) NN Condition

Duplex Supporting N/A

Service Manual

2-3

Samsung Electronics

Product spec and feature

Service Manual

2-4

Samsung Electronics

2.1.2.4 Consumables

Items Specication

Toner Cartridge Black Initial : Average Cartridge Yield 0.7K standard pages.

Sales : Average cartridge Yield 1.5K standard pages.

Declared cartridge yield in accordance with ISO/IEC 19752.

Key Electronic key(CRUM) Only

Life detect Toner gauge sensor by dot count

2.1.2.5 Maintenanace part

Items Life

Transfer roller 30K pages

Fuser unit 30K pages

Pick up roller 30K pages

2.1.2.6 Reliability & Service

Items Specication

Printing Volume (SET AMPV) 75 sheets/month

MPBF 10,000 sheets

MTTR 30 min.

SET Life Cycle 30,000 sheets or 5 years (whichever comes rst)

2.1.2.7 Environment

Items Specifi cation

Product spec and feature

Operating
Environment

Acoustic Noise
Level(Sound Power/
Pressure)

Power Consumption Ready Less than 40W

Dimension
(W x D x H)

Weight SET 4.12kg

Temperature 10C to 32C

Humidity 20% to 80%

Printing 49 dBA

Standby Back Ground Level

Sleep Back Ground Level

AVG. Less than 270W

Max/Peak Less than 300W

Sleep / Power Off Less than 2.8W / Less than 0.45W (Conformity to EPA)

SET 341 x 224 x 184 mm (13.42” x 8.81” x 7.24”)

SET Packing 394 x 278 x 241 mm (15.5” x 10.0” x 9.5”)

Toner 284 x 231.5 x 47.8mm

Toner Packing 361 x 270 x 113 mm

Toner 0.68kg

Gross 5.6kg

2.1.2.8 Packing & Accessory

Items Life

Driver & Network Install CD-ROM
Power Cable

In-Box

USB Cable (CIS/China/Korea/India)
Quick Install Guide
Warranty Registration Card
User’s Manual (PDF File)

Service Manual

2-5

Samsung Electronics

Product spec and feature

Service Manual

2-6

Samsung Electronics

2.1.2.9 Options

Items Specication

Memory N/A

Second Cassette N/A

Wired Network N/A

Wireless Network N/A

Hard Disk N/A

Duplex Unit N/A

Product spec and feature

Service Manual

2-7

Samsung Electronics

2.1.3 Model Comparison Table

Samsung

ML- 1660

Image

Speed 16 ppm (A4) 22 ppm (A4) 23 ppm (A4)

processor 150 MHz 150 MHz 266 MHz

Memory 8 MB 8 MB 32 MB

Print Language GDI GDI PCL5e

Input 150 sheets Bin 150 sheets Bin

Duplex Manual Manual Manual

Interface USB 2.0 USB 2.0 USB 2.0

Size (mm) 341 x 224 x 184 mm 353 x 298 x 213 mm 379 x 243 x 225 mm

Samsung

ML- 2240

HP

P1505n

250 sheets Bin,

10 Manual

Toner Standard 0.7K / 1K Standard 1.5K Standard 2K

Product spec and feature

Service Manual

2-8

Samsung Electronics

2.2 System Overview

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

2.2.1 Front View

This illustration may differ from your machine depending on its model.

1 Control panel 5 Paper length guide
2 Top cover 6 Paper width guides
3 Toner cartridge 7 Output support
4 Tray 8 Output tray (face down)

Product spec and feature

Service Manual

2-9

Samsung Electronics

2.2.2 Rear View

This illustration may differ from your machine depending on its model.

1 USB port 2 Power receptacle

Product spec and feature

Service Manual

2-10

Samsung Electronics

13

5

12

11

7

1

2

9

14

10

3

6

4

8

2.2.3 System Layout

This model is consisted of the Engine parts and F/W, and said engine parts is consisted of the mechanical
parts comprising Frame, Feeding, Developing, Driving, Transferring, Fusing, Cabinet and H/W comprising
the main control board, power board, operation panel, PC Interface.

NO. NAME

1 Pressure roller
2 Heat roller
3 Exit roller
4 Toner Cartridge
5 LSU
6 Charge roller
7 OPC

NO. NAME

8 Transfer roller
9 Deve roller

10 Supply roller
11 Feed roller
12 Friction pad
13 Pickup roller

Product spec and feature

Service Manual

2-11

Samsung Electronics

2.2.3.1 Feeding Part

It is consists of a basic cassette, an MP tray for supplying different types of media (envelope, label, special
paper) and parts related to paper transferring.

1) Separation method

Paper is separated by the friction pad mounted to the center of the cassette.

2) Input tray

This model has a bin-type tray.
It takes a center loading method and applies ‘friction pad
separating method.’
Both the side guide and the rear guide can be adjusted for for
various types of papers from A6 to legal size paper.

It has a paper existence sensing function

(Capacity: 150 sheets (80g/㎡ paper standard), paper
arranging function, various size papers accepting function.
In the front side, there is a paper level indicator.

3) 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 drive by solenoid.

Product spec and feature

Service Manual

2-12

Samsung Electronics

2.2.3.2 Transfer Roller

- The transfer roller delivers the toner of the OPC drum to the paper.

- There is no PTL Ass’y.

- Life Span : Print over 30,000 sheets (in15~30℃)

2.2.3.3 Driver Assy

- In ML-1660, the driving device is consisted 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 840 PPS (1050rpm)

• It is a power delivery unit by gearing: Step Motor → Pick-up/Feeder/Transfer/Fuser/Exit

Product spec and feature

Service Manual

2-13

Samsung Electronics

2.2.3.4 Fuser

It is consisted of a halogen lamp, heat roller, pressure roller, thermistor and thermostat. It sticks the toner on
a paper by heat and pressure to complete the printing job.

1) Thermostat

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

- Thermostat Type : Non- Contact type dual THERMOSTAT

- Control Temperature : 170℃ ± 5 ℃

2) Thermistor

It is a temperatrue detecting sensor.

- Temperature Resistance : 7 ㏀ (180 ℃ )

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 Teon, 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

Teon. When a paper passes between a heat roller and a pressure roller, toner adheres to the surface of a
paper permanently.

5) Halogen Lamp

- Voltage 120 V : 115 ± 5 %

220 V : 230 ± 5 %

- Capacity : 600 Watt ± 25 W

Product spec and feature

Service Manual

2-14

Samsung Electronics

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.

Product spec and feature

Service Manual

2-15

Samsung Electronics

OPC Drum

Photo Diode

LD Driver circit

Protector panel

LD(Laser Diode)

Polygon Mirror

Polygon Motor

Motor Driver

2.2.3.5 LSU (Laser Scanner Unit)

It is the core part of the LBP 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.

Product spec and feature

Service Manual

2-16

Samsung Electronics

Cleaning Roller

Cleaning Blade

-720V

-350V

-550V

0.20mW

Max -1.4KV

-100V

1

2

3

4

5

6

7

8

+3.5kV

-150V↓

2.2.3.6 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 toner cartridge unit
has toner, supply roller, developing roller, and blade (Doctor blade)

• Developing Method : Non magnetic 1 element contacting method

• Toner : Non magnetic 1 element shatter type toner

• Charging capacity : - 39.1 ± 3 μC/g

• Average OD : 8.0 ± 0.5㎛ (Toner)

• The life span of toner (ISO 19752 pattern / A4 standard)
→ Initial toner : 0.7K
→ Sales toner : 1.5K

• Toner Residual Sensor : Dot count with CRUM(CRU Monitor)

• 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

• OPC Drum Protecting Shutter : None

• Classifying device for toner cartridge: ID is classied by CRUM.

Product spec and feature

Service Manual

2-17

Samsung Electronics

CN4, LSU I/F CN8, Pick

up_clutch

CN2, Fuser

CN1, Hyper

CN5, Sensor

CN7, Main
motor drive

CN6, Power I/F

2.2.4 Engine H/W Specications

2.2.4.1 Main PBA

The Engine Board and the Controller Board are in one united board, and it is consisted of CPU part and
print part in functional aspect. The CPU is functioned as the bus control, I/O handling, drivers, and PC
interface. The main board sends the Current Image of Video data to the LSU and manages the conduct of
Electrophotography for printing. It is consisted of the circuits of the motor (paper feed, pass) driving, clutch
driving, pre- transfer lamp driving, current driving.
The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main board.

Product spec and feature

Service Manual

2-18

Samsung Electronics

(a) Asic(Jupiter4e)

• CPU Core : Use 32Bit RISC Processor of Jupiter4e, and control system by operating Operation Block of

the System Program inside Flash Memory.

- Main Function Block:

▶ Completely Integrated System for Embedded Applications,
▶ 32 Bit Risc Architecture, Efcient and Powerful ARM9 CPU
▶ LSU Interface Module for Interfacing PVC with LSU
▶ 2 Channel General Purpose DMA Controller for High Speed I/O
▶ Dual Memory Bus Architecture

- Operation Frequency : 150MHz

- Operation Voltage : 3.3V

- POWER ON RESET TIME : 6.6ms below

(b) Memory

1) Flash Memory
Store System Program and can be download System Program through PC Interface

- Capacity : 0.5M Byte

- Access Time : 70 nsec

2) SDRAM
When Printing, use Band Buffer, System Working Memory Area .

- 8M capa : 8M Byte basic.
8M :Printing System Working Memory Area

- Access Time : 60 nsec

Product spec and feature

Service Manual

2-19

Samsung Electronics

(c) Sensor Input Circuit

■ Paper Empty Sensing

The Paper empty sensor on the tray detects the state of paper empty and the state of paper width i.e. narrow
paper width or not.

■ Regi Sensing

N/A

■ Paper Feeding

When paper passes the actuator (feed sensor part), it detects the signal of Photo interrupter, informs the
paper feeding state to CPU, and then sprays the image data after certain time.
If it doesn’t detect the feed sensor within 1sec. after paper is fed, paper Jam0 is occurred (LED will be display
Orange color).

■ Paper Exit Sensing

N/A

■ Cover Open Sensing

The Cover open sensor is located on the HVPS. After the top cover is opened, +24VS (Solenoid, Main Motor,
Polygon motor part of LSU and HVPS), which is supplied to the each unit, is cut off.
In case, the red will be ON for informing the facts to user.

■ SOLENOID Driving

Clutches are driven by turning on TRs, which is controlled by CPU. The diode in the Clutch driving circuits
protects TR driven from the noise pulse, which is occurred when the solenoid is de-energized.

■ Motor Driving

The main motor driving circuits is on the main board
There is motor driver IC on the main board control the step motor.

Product spec and feature

Service Manual

2-20

Samsung Electronics

Main board

Fuser

2.2.4.2 HVPS and SMPS Board

The HVPS Board and SMPS Board are in one united board.

The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for
making best condition to display the image. The HVPS part takes the 24V and outputs the high voltage for
THV/MHV/BIAS, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller

It is the power source of entire system. It is assembled by an independent module, so it is possible to use for
common use. It is mounted at the side of the set.
It is consisted of the SMPS part, which supplies the DC power for driving the system, and the AC heater
control part, which supplies the power to fuser. SMPS has two output channels. Which are +3.3V and +24V.

Product spec and feature

Service Manual

2-21

Samsung Electronics

■ HVPS Board

• Transfer High Voltage (THV+)

- Input Voltage : 24 V DC ± 15%

- Output Voltage : THV+: max +3.5kV ± 10 %,(Duty Variable, no loading )

THV-: -1kV±20% (when cleaning,200 ㏁)

- Input contrast of the Voltage stability degree : under ± 3 % (uctuating input 21.6V~26.4V)

Loading contrast : ± 3 % or less

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 100 ms Max

- Fluctuating transfer voltage with environmental various : 0~3.5kV

- Environment Recognition Control Method : The THV-PWM ACTIVE is transfer active signal. It detects the

resistance by recognizing the voltage value, F/B, while permits the environmental recognition voltage.

- Output Voltage Control Method : Transfer Output Voltage is outputted and controlled by changing Duty of

THVPWM Signal.

• Charge Voltage (MHV)

- Input Voltage : 24 V DC ± 15%

- Output Voltage : -1.0KV ~ -1.8KV DC ± 3%

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 30 MΩ ~ 1000 MΩ

- Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low

• Cleaning Voltage (THV- )

- The (+) Transfer Voltage is not outputted because the THV PWM is controlled with low.

- The (-) Transfer Voltage is outputted because the THV-Enable Signal is controlled with low

- The output uctuation range is big because there is no Feedback control.

• Developing Voltage (DEV)

- Input Voltage : 24 V DC ± 15%

- Output Voltage: -200V ~ -500V DC ±3%

- Output Voltage Fluctuation range: PWM Control

- Input contrast of the output stability degree : ± 3 % or less

Loading contrast : ± 3 % or less

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10MΩ ~ 1000 MΩ

- Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low.

• Supply

- Output Voltage : -350 V ~ -650V DC ±50 V(ZENER using, DEV )

- Input contrast of the output stability degree : under ± 5 %
Loading contrast : ± 5 % or less

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10 MΩ ~ 1000 MΩ

- Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low.

Product spec and feature

Service Manual

2-22

Samsung Electronics

■ SMPS Board

• AC Input

- Input Rated Voltage : AC 220V ~ 240V AC 110V ~ 127V

- Input Voltage uctuating range : AC 180V ~ 270V AC 90V ~ 135V

- Rated Frequency : 50/60 Hz

- Frequency Fluctuating range : 47 ~ 63 Hz

- Input Current : Under 4.0Arms / 2.0Arms (But, the status when Fuser is off or rated voltage is inputted/

outputted

• Rated Output Power

NO ITEM CH1 CH2 Remark

1 CHANNEL NAME +3.3V +24.0V

CON 3
24V PIN:1,2,3
GND PIN:8,9,25,26

+24V±10% -> -10%, +15%,
(21.6~26.4V) -> 27.6V

2 CONNECTOR PIN

3 Rated Output

CON 3

3.3V PIN: 5,7
GND PIN: 8,9

+3.3V±5%
(3.135~3.465V)

4 Max. Output Current 0.8A 1.35A

5 Peak Loading Current 1.0A 1.8A 100ms

6 RIPPLE NOISE Voltage 100mVp-p Under 500mVp-p

7 Maximum output 2.64W 32.4W

8 Peak output 3.3W 43.2W 100ms

Protection for loading shortage

9

and overowing current

Shut down or Fuse

Protection

Shut down or Output
Voltage Drop

Product spec and feature

Service Manual

2-23

Samsung Electronics

2.2.5 Engine F/W Contol Algorithm

2.2.5.1 Feeding

If feeding from a cassette, the drive of the pickup roller is controlled by controlling the solenoid. The on/off
of the solenoid 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

- After picking up, paper cannot be entered due to paper is not fed.

- After picking up, paper entered but it cannot reach to the feed sensor in certain time due to
slip, etc.

JAM 0

JAM 1

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

* It is a status that the leading edge of the paper doesn’t pass the feed sensor.

- Even though the paper reaches to the feed sensor, the feed sensor doesn’t be ON.

* It is a status that the leading edge of the paper already passes the feed sensor.

- After the leading edge of the paper passes the feed sensor, the trailing edge of the paper
cannot pass the feed sensor after a certain time. (The feed sensor cannot be OFF)

2.2.5.2 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 recognition. 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 environments, is changed through AD converter. The voltage value for
impressing to the transfer roller is decided by the changed value.

Product spec and feature

Service Manual

2-24

Samsung Electronics

2.2.5.3 Fusing

The temperature change of the heat roller’s surface is changed to the resistance value through the thermistor.
By converting the voltage value, which impressed to the resistance, to the digital value through the AD
converter, the temperature is decided. The AC power is controller 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 xing unit is not higher than a
specied temperature, the engine denes Open Heat Error. When this error is broken out, the engine stops
all functions and keeps 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.

• Low Heat Error

When the engine is at stand-by, printing or warm-up mode, if the temperature of the xing unit is lower than
the specied temperature at each state and the lower temperature state is maintained during the specied
time, the engine denes Low Heat Error. When this error is broken out, 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.

• Over Heat Error

For overall engine state, if the temperature of the xing unit is higher than the specied temperature and the
temperature state is kept during the specied time, the engine denes Over Heat Error. When this error is
broken out, 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 to inform the
error status of the user.

2.2.5.4 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 specied
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 to inform 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 xed time, it denes 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 to inform the error status of the user.

LSU Error Recovery: If the LReady or Hsync error happens, the paper exits out beforehand.
The engine mode is changed to recovery mode and the engine informs the main system of the
engine mode. And the engine checks the LSU error. If the error doesn’t happen, the printing job
will be proceeding.

Product spec and feature

Service Manual

2-25

Samsung Electronics

2.2.6 S/W Descriptions

2.2.6.1 Overview

The software of ML-1660 system is constructed with

1) Host Software part that the application software operated in Window and Web Environment, and

2) Firmware parts that is a Embedded software controls printing job.

2.2.6.2 Architecture

Host Software is made up of

1. Graphic User Interface that offers the various editing functions to user in Host,

2. Driver that translates the received document to a Printing Command language which printer can

understand and transfers data to spooler,

3. Stand-alone Application that offers the various printing application, PSU(Printer Settings Utility), Printer

Status Monitor, Network Management in Window system,

4. Web-based-Application that offers the same functions as Stand-alone Application and RDC(Remote

Diagnosis Control) in Web environment.

Firmware is made up of

1. Application (Emulation) that is a interpreter translate 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 that control and management the whole procedure include of Control ow and Printing Job before

transfer to Engine system.

Product spec and feature

Service Manual

2-26

Samsung Electronics

2.2.6.3 Data and Control Flow

. GDI(only SCX-4824FN)
& PCL6 (PCL XL)

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 le.

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 rst, make communication logical
port, manage the data, transfer them from spooler to network port, and offer the result of printing).

Product spec and feature

Service Manual

2-27

Samsung Electronics

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 ow control of emulation procedure, receiving data from Host or Network card

and printing with engine & rendering job,

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, Driver

translate the all graphic data of it 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 t 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

- 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.

- Kernel receives this data from Host, and then select emulation t 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.

The additional printing function are realized in

(1) Web environment
(2) Window environment.

On addition, Kernel informs a status of printing status and printer status to user made printing job with the
Status Monitor.

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, re

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 re 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 rfe. 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 rst, 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 tted such as sensors,

motors or lamps as they may get hot.

3. Take care when tting, 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 retted in their original

positions.

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.

Service Manual

3-1

Samsung Electronics

Disassembly and Reassembly

Service Manual

3-2

Samsung Electronics

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

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 8
6003-000269 SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 20
6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 5
6003-000282
6006-001078 SCREW-TAPTYPE;PH,+,WSP,B,M3,L10,ZPC(WHT),SWRCH18A 1
6003-000196
6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 4
6003-000269 FUSER -LOWER SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 3
6003-000196 FRAME-PAPER PATH SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 7
6003-000282 FRAME-FEED IDLE SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 2
6003-000269
6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 2
6003-000269 FRMAE MAIN-RIGHT SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 2
6003-000269 FRAME MAIN-MIDDLE SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 5
6003-000282 LSU SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 5
6003-000282 COVER-TOP SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 1
6003-000282 CARTRIDGE-TONER SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 4
6003-000269
6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 2

FRAME

SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 3

FUSER

SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 1

FUSER-UPPER

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 6

FRMAE MAIN-LEFT

SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 8

MAIN LINE

Disassembly and Reassembly

Service Manual

3-3

Samsung Electronics

3.3 Cover

3.3.1 Left/Right cover

1. Take off the left cover by removing hooks from
its edge.

2. Take off the right cover by removing hooks from
its edge.

3.3.2 Rear bracket

1. Remove 4 screws. Release the rear bracket.

Disassembly and Reassembly

Service Manual

3-4

Samsung Electronics

3.3.3 Cover-open

1. Release the cover-open from the hook of both sides.

3.3.4 Top/Front cover

1. Remove 2 screws. Hold the top and front cover and pull both of them to the direction of arrow.

2. Separate the top and front cover.

Top cover

Front cover

Disassembly and Reassembly

Service Manual

3-5

Samsung Electronics

3.4 Main PBA

1. To remove the main PBA, rst remove the right cover. (Refer to 3.3.1)

2. Remove 4 screws. Unplug all connectors. And release the Main PBA.

Disassembly and Reassembly

Service Manual

3-6

Samsung Electronics

3.5 SMPS/HVPS board

1. To remove the SMPS/HVPS board, rst remove the right cover and rear bracket. (Refer to 3.3)

2. Remove 4 screws. Unplug all connectors. And release the main-PBA bracket.

3. Remove 8 screws. Unplug a connector. And release the SMPS/HVPS board.

Disassembly and Reassembly

Service Manual

3-7

Samsung Electronics

3.6 Fuser unit

1. Remove the main PBA bracket. (Refer to 3.5)

2. Unplug the connector on SMPS/HVPS board.

3. Remove 3 screws.

4. Pull the fuser unit to the direction of arrow slightly and release it.

Disassembly and Reassembly

Service Manual

3-8

Samsung Electronics

Top view

Front view

COVER-LSU

Top view

Front view

COVER-LSU

Front view

3.7 LSU

1. Remove the front/ top/ rear cover. (refer to 3.3 cover)

2. Remove 4 screw securing the COVER-LSU. Release the COVER-LSU.

3. Remove 3 screws. Release the LSU.

Disassembly and Reassembly

Service Manual

3-9

Samsung Electronics

3.8 Drive unit

1. Remove the left cover.

2. Remove 4 screws. Release the drive unit.

Disassembly and Reassembly

Service Manual

3-10

Samsung Electronics

3.9 Step motor

1. Remove the drive unit. (Refer to 3.8)

2. Remove 7 screws. Release the left-frame
bracket.

3. Remove 2 screws. Release the step motor.

Caution
When reassembling the drive unit, put down the

drive unit and assemble the left-frame bracket.

Disassembly and Reassembly

Service Manual

3-11

Samsung Electronics

3.10 Pick up roller

1. Open the top cover.

2. Take out the toner cartridge.

3. Push the hinge to the direction of arrow.

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 manual.

4.1.1 Control Panel

The ML-1660 series printers have 2 keys and 2 LEDs.
The ‘User Interface’ module handles the processing of the ‘Key Press’ and ‘LED control’ at different states of
the machine.

1 Jam Shows the status of jam occurance of your machine.

2

3

4

Service Manual

Online/ Error Shows the status of your machine.

Print Screen Prints the displayed screen in the monitor.

Power You can turn the power on and off with this button.

4-1

Samsung Electronics

Alignment and Troubleshooting

Service Manual

4-2

Samsung Electronics

4.1.2 Understanding The Control Panel

The color of the LEDs indicates the machine’s current status.

LED STATUS DESCRIPTION

Jam

Online/
Error

Orange On A paper jam has occurred.

Off • The machine is off-line.
Green On • The machine is in power saver mode.

• The machine is on-line and can receive data from the computer.

Blinking • When the LED slowly bilnks, the machine is receiving data from the

computer.

• When the LED rapidly blinks, the machine is printing data.

Red On • 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.

• Your system has some problems. If this problem occurs, contact

your service representative.

• A toner cartridge has almost reached its estimated cartridge life

Blinking • A minor error has occurred and the machine is waiting for the error

to be cleared. When the problem is cleared, the machine resumes

printing.

• Small amount of toner is left in the cartridge. The estimated cartridge

lifea of toner is close. Prepare a new cartridge for replacement. You
may temporarily increase the printing quality by redistributing the
toner.

• The machine is printing in manual feed mode or in manual duplex

mode.

• The machine is canceling a print job.

a

.

Alignment and Troubleshooting

Service Manual

4-3

Samsung Electronics

4.1.3 JAM Removal

4.1.3.1 Clearing Paper Jams

If a paper jam occurs, the LED on the control panel lights orange. Find and remove the jammed paper.
To resume printing after clearing paper jams, you must open and close the top cover.

In tray

1. If the output tray is opened, close the output tray

rst.

2. Open and close the top cover. The jammed
paper is automatically ejected from the machine.
Make sure to open the output tray before paper
ejects from the machine.

If the paper does not exit, go to the next step.

3. Remove the original jammed paper by gently
pulling it straight out.

Inside the machine

1. If the output tray is opened, close the output tray

rst.

2. Open and close the top cover. The jammed
paper is automatically ejected from the machine.
Make sure to open the output tray before paper
ejects from the machine.

If the paper does not exit, go to the next step.

3. Close the output tray and open the top cover.

4. Open the funser unit cover.

If the paper does not move when you pull, or if
you do not see the paper in this area, check the
fuser area around the toner cartridge.

If you do not see the jammed paper, go to next

step.

Alignment and Troubleshooting

Service Manual

4-4

Samsung Electronics

5. Remove the original jammed paper by gently
pulling it straight out.

If you do not see the jammed paper, go to next

step.

7. Remove the original jammed paper by gently
pulling it straight out.

8. Replace the toner cartridge.

6. Pull the toner cartridge out.

9. Close the fuser unit cover.

10. Close the top cover and open the output tray.

Printing automatically resumes.

Alignment and Troubleshooting

Service Manual

4-5

Samsung Electronics

4.1.4 Printing a report

This product provides several printable reports for maintenance purposes. These reports can be used to aid
the diagnosis of print quality problems.

By pressing the Print screen button, you can print these reports.

Report How to print

Printing demo page & conguration

sheet
Supplies info report In the ready mode, press and hold this button for about 10 seconds

In the ready mode, press and hold this button for about 6 seconds
until the green LED blinks slowly, and release.

until the green LED blinks rapidly, and release.

Alignment and Troubleshooting

Service Manual

4-6

Samsung Electronics

■ Demo Page

Alignment and Troubleshooting

Service Manual

4-7

Samsung Electronics

■ Supplies Information Report

Alignment and Troubleshooting

Service Manual

4-8

Samsung Electronics

4

1

2

6

7

3

5

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

OPC Drum 62.9mm White and Black Spots
Developing Roller 35.1mm White spot, Horizontal black band
Charging Roller 26.7mm Black Spot and line and periodic band
Supply Roller 47mm Periodic Band by little difference of density
Transfer Roller 39.2mm Ghost, Damaged image by abnormal transfer Transfer roller
Pressure Roller 75.4mm Background
Fusing Roller 77.5mm Black spot and image ghost

Toner Cartridge

Fuser

1 Pressure roller 5 Transfer roller
2 Heat roller 6 Deve roller
3 Charge roller 7 Supply roller
4 OPC

Alignment and Troubleshooting

Service Manual

4-9

Samsung Electronics

4.1.6 Firmware upgrade

1) Connect PC and printer with USB cable.

2) Turn on the power of printer.(Ready Status)

3) Drag the f/w le and Drop down on the usblist2.exe. And then f/w update will be started automatically.

4) Please wait until end reboot.

Alignment and Troubleshooting

Service Manual

4-10

Samsung Electronics

4.1.7 Using the smart panel program

Smart Panel is a program that monitors and informs you of the machine status, and allows you to customize

the machine’s settings. Smart Panel is installed automatically when you install the machine software.
To use this program, you need the following system requirements:

• Windows. Check for windows operating system(s) compatible with your machine.

• Mac OS X 10.3 or higher

• Linux. Check for Linux systems that are compatible with your machine.

• Internet Explorer version 5.0 or higher for ash animation in HTML Help.

If you need to know the exact model name of your machine, you can check the supplied software CD.

4.1.7.1 Understanding Smart Panel

If an error occurs while printing, you can check the error from the Smart Panel.

You can also launch Smart Panel manually. Double-click the Smart Panel icon on the Windows task bar (in
Windows), or Notication Area (in Linux).
You can also click it on the status bar (in Mac OS X).

Windows Double-click this icon in Windows.

Macintosh Click this icon in Mac OS X.

Linux Click this icon in Linux.

Or, if you are a Windows user, you can launch it from the Start menu, select Programs or All Programs >
Samsung Printers > your printer driver name > Smart Panel.

• If you have already installed more than one Samsung machine, rst select the correct machine model

you want in order to access the corresponding Smart Panel.

Right-click (in Windows or Linux) or click (in Mac OS X) the Smart Panel icon and select your machine.

• The Smart Panel window and its contents shown in this user’s guide may differ depending on the

machine or operating system in use.

The Smart Panel program displays the current status of the machine, the level of toner remaining in the toner
cartridge(s), and various other types of information. You can also change settings.

Alignment and Troubleshooting

Service Manual

4-11

Samsung Electronics

View the level of toner remaining in the toner cartridge(s). The machine and

1 Toner Level

2 Buy Now Order replacement toner cartridge(s) online.

3 User’s Guide

4 Printer Setting

5 Driver Setting

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.

View User’s Guide.
This button changes to Troubleshooting Guide when error occurs. You can
directly open troubleshooting section in the user’s guide.

Congure various machine settings in the Printer Settings Utility window.

Some machines do not have this feature.

If you connect your machine to a network, the SyncThru™ Web Service

window appears instead of the Printer Settings Utility window.
Set all of the machine options you need in the Printer Preferences window.

This feature is available only for Windows.

4.1.7.2 Opening the Troubleshooting Guide

Find solutions for problems by using the Troubleshooting Guide.

Right-click (in Windows or Linux) or click (in Mac OS X) the Smart Panel icon and select Troubleshooting

Guide.

4.1.7.3 Changing the Smart Panel Program Settings

Right-click (in Windows or Linux) or click (in Mac OS X) the Smart Panel icon and select Options. Select the

settings you want from the Options window.

Alignment and Troubleshooting

Service Manual

4-12

Samsung Electronics

Power On

Red LED or
Orange LED on?

- Red : Yes

- Orange : No

OPE LED

Green OK?

Print(test pattern)

printing

Quality is

Nomal?

Refer to "Solution

of Image Problem"

See the troubleshooting
flow chart.

END

- No Power

- Power Module error

- Main PBA

OPE LED

ON?

Remove the

jammed paper.

4.2 Troubleshooting

4.2.1 Procedure of Checking the Symptoms

Before attempting to repair the printer rst obtain a detailed description of the problem from the customer.

Alignment and Troubleshooting

Service Manual

4-13

Samsung Electronics

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 PBA and cable harness.

3. Check the Paper Path

• Is there a Paper Jam?

--> Remove any paper fragments caught in the paper path.

• Paper Jam occurs repeatedly at a specic 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 (Conguration).

• Try printing a test page from a computer.

--> If there is an error check cables and driver installation.

5. Check the Print Quality.

• Is there are a Print Quality Problem?

--> Refer to section 4.2.5

6. Check consumables (toner etc.).

• Using the keys print the Test Pattern.

--> Expected life of various consumable parts, compare this with the gures printed and replace as

required

Alignment and Troubleshooting

Service Manual

4-14

Samsung Electronics

4.2.1.2 Initial Inspection

1. Check Power part

1. The printer does not work no matter how long you wait.

A. Is the Power Switch (printer and wall socket) turned on ?
B. Is the Power Cord connected to the printer correctly ?
C. Is the Power cord connected to the wall socket correctly ?
D. Is wall socket working ?
E. Is the unit rated at the same voltage as the supply ?

2. Does the Fan work when power is turned on?
A. Check the connectors on the SMPS.
B. Check the fuses in the SMPS.(F1)

2. Check the Installation Environment.

1. Ensure the installation surface is at, level and free from vibration.

If necessary move the printer.

2. Ensure that the temperature and humidity of the surroundings are within specication

If necessary move the printer.

3. Ensure that the printer is position away from any air conditioning or other heating or cooling equipment.
Also ensure that is not positioned in a direct draft from any air conditioning, fan or open window.

If necessary move the printer.

4. Ensure the printer is not positioned in direct sunlight.

If it is unavoidable use a curtain to shade the printer.

5. Ensure the printer is installed in a clean dust free environment.

Move the printer to clean area if necessary.

6. Some industrial or cleaning processes give of fumes which can affect the printer.

Move the printer away from this type of air pollution

3. Check paper type.

1. Use only paper which is of a suitable quality, weight and size?

See the user guide.

4. Check the overall condition of the printer

1. Is the printer properly maintained ?

Clean the Paper Transport Passages.

Any rollers with dirt surfaces should be cleaned or replaced.

Alignment and Troubleshooting

Service Manual

4-15

Samsung Electronics

1. Check the Solenoid.

2. Check if the separation pad in the
cassette is worn away.

3. Check the surface of the

roller-pick up is contaminated.

Replace the solenoid.

Replace the separation pad.

Clean with soft cloth dampened
with IPA(Isopropyl Alcohol) or
replace the pick up roller.

4.2.2 Bad discharge

1) JAM 0

Description : 1. Paper is not exited from the cassette.

2. Jam-0 occurs if the paper feeds into the printer.

Alignment and Troubleshooting

Service Manual

4-16

Samsung Electronics

1. If the paper is

jammed in front of or inside the fuser.

2. If the recording

paper is stuck in the discharge

roller and the fuser just after passing

through the Actuator-Feed, Feed

Actuator may be

defective.

Replace the fuser unit.

Reassemble the Actuator-Feed
and Spring-Actuator if the returning
is bad.

2) JAM 1

Description : 1. Recording paper is jammed in front of or inside the fuser.

2. Recording paper is stuck in the discharge roller and in the fuser just after
passing through the Actuator-Feed.

Alignment and Troubleshooting

Service Manual

4-17

Samsung Electronics

1. Solenoid malfunction

(the solenoid does not work properly)

2. Cassette holder pad is

contaminated with foreign

matter.(oil...)

Replace the solenoid if necessary.

Clean the pad friction with soft
clothe dampened with IPA
(Isopropyl Alcohol).

3) Multi-Feeding

Description : Multiple sheets of paper are fed at once.

Alignment and Troubleshooting

Service Manual

4-18

Samsung Electronics

1. Paper is too much thin.

2. The face of paper is curled.

Recommend to use normal paper.

How to remove the rolled in the
OPC Drum.

- Remove the paper while turning
the OPC Drum against the
ongoing direction.

4) Paper rolled on the OPC Drum

Description : Paper is rolled up in the OPC.

Alignment and Troubleshooting

Service Manual

4-19

Samsung Electronics

1. Bending or deformation of

the actuator of the paper sensor.

2. Check if the

connector of the sensor PBA is

connected properly.

Replace the defective actuator.

Reconnect the connector.
If the problem persist, replace the
sensor PBA.

4.2.3 Malfunction

1) Paper Empty

Description : The paper lamp on the operator panel is on even when paper is loaded in the

cassette.

Alignment and Troubleshooting

Service Manual

4-20

Samsung Electronics

1. Check the connector

and circuit of the cover switch

department in the SMPS board.

1. Check the insertion of the Cover
Open S/W Connect.

2. Replace the SMPS/HVPS board.

2) No lamp on when the cover is open

Description : The ERROR lamp does not come on even when the printer cover is open

Alignment and Troubleshooting

Service Manual

4-21

Samsung Electronics

1. Motor harness may be defective.

2. Check the motor operation.

Check the motor harness, replace
it, if defective.

Replace the Motor or Drive unit,
if necessary.

3) Defective motor operation

Description : Main motor is not driving when printing, and paper does not feed into the printer,

resulting ‘Jam 0’.

Alignment and Troubleshooting

Service Manual

4-22

Samsung Electronics

1. Check if the flat cable

between the main board and

HVPS/SMPS board is connected

correctly.

2. Check if the HVPS/SMPS
output is normal.

Reconnect the flat cable.

Replace the HVPS/SMPS board.

4) No Power

Description : When system power is turned on, all lamps on the operator panel do not come on.

Alignment and Troubleshooting

Service Manual

4-23

Samsung Electronics

1. If the supply of +24v

is unstable in the Main board

linking with LSU.

1. Replace LSU.

2. Replace the Main board.

5) Vertical Line Getting Curved

Description : When printing, vertical line gets curved.

Alignment and Troubleshooting

Service Manual

4-24

Samsung Electronics

3. Partly depression or

deformation on the surface of

the transfer roller.

2. Scratched surface of

the charge roller in the toner cartridge.

1. Damaged develop roller in

the Toner cartridge. Deformed Doctor-blade

or cleaning-blade.

If causes 1 and 2 occur in the
toner cartridge, replace the toner
cartridge and try to print out.

Replace the transfer roller if

occurred as No. 3.

4.2.4 Bad image

1) Vertical Black Line and Band

Description : 1. Straight thin black vertical line occurs in the printing.

2. Dark black vertical band occur in the printing.

Alignment and Troubleshooting

Service Manual

4-25

Samsung Electronics

3. It may occur when Burr and

foreign substances are on the window

of the toner cartridge frame.

4. If the fuser is defective,

voids occur periodically at the

top of a black image.

5. It may occur when foreign

substances are on the OPC Drum.

2. Foreign matter or

toner particles between the toner

cartridge roller and blade. (In case the life of the

toner cartridge has been expired, white

lines or light image occur in

front of the image.)

1. Foreign matter stuck onto the
window of internal lenses

of LSU mirror.

Foreign matter stuck onto the

window : Clean the LSU window

with recommended cleaner(IPA)

Clean the window with a clean

cotton swab.

Replace the toner cartridge.

No 3. : Remove the foreign matter

and burr of the exposure window.

(toner cartridge)

No. 4. : Open the front cover and

check ribs that corresponds to the
position of the voids. Remove if
found.

If the problems are not solved,
replace the toner cartridge.

2) Vertical White Line

Description : White vertical voids in the image.

Alignment and Troubleshooting

Service Manual

4-26

Samsung Electronics

2. The rollers of

developer may be stained.

1. Bad contacts of the voltage
terminals to developer.

Clean each voltage terminal of the

Charge, Supply, Develop and

Transfer roller.(remove the toner
particles and paper particles)

1. Clean the right Gear that has

relatively small gap of the teeth

in the OPC.

2. If the malfunction persists,
replace the developer.

Opc drum = 62.9mm
Developing Roller = 35.1mm
Charging Roller = 26.7mm
Supply Roller = 47mm
Transfer Roller = 39.2mm
Pressure Roller = 75.4mm
Fusing Roller = 77.5mm

3) Horizontal Black Band

Description : Dark or blurry horizontal stripes occur in the printing periodically.

(They may not occur periodically.)

Alignment and Troubleshooting

Service Manual

4-27

Samsung Electronics

3. If a black image is

partially broken, the transfer voltage is

abnormal or the transfer roller's

life has expired.

2. If faded areas or voids

occur in a black image at intervals

of 62.9mm, or black spots occur elsewhere,

the OPC drum surface is

damaged.

In case of 62.9mm interval
unremovable in 1, cleanly remove

foreign substances stuck on the OPC

location equivalent to black spots and
white spots with a dry duster.

1. The transfer roller guarantees
30,000 sheets printing. If the

roller's life is expired, replace it.

2. In case of 39.2 mm interval
unremovable in 1, take measures
as to replace the develop-er
cartridge and try to print out.

5. Clean the inside of the set against

the paper particles and foreign
matter in order not to cause the
trouble.

Run the Self-test 2 or 3 times.

1. If dark or blurry

black spots occur periodically,

the rollers in the Developer may be conta-

minated with foreign matte or paper particles.

(Charge roller : 26.7mm interval

OPC drum : 62.9mm interval)

4) Black/White Spot

Description : 1. Dark or blurry spots occur periodically in the printing

2. White spots occur periodically in the printing

Alignment and Troubleshooting

Service Manual

4-28

Samsung Electronics

1. Ambient temperature is
below than 10℃.

2. Bad contact caused

by the toner stains between the high

voltage terminal in the HVPS and

the one in the set.

3. Abnormal output from the HVPS.

Replace the developer cartridge
and try to print out.

Wait 30 minutes after printer is
powered on before you start printing.

1. Clean up the contaminated area
by the toner.

2. Replace the HVPS if the
problems are not solved by the
above four directions.

5) Light Image

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

Alignment and Troubleshooting

Service Manual

4-29

Samsung Electronics

6) Dark Image or a Black Page

2. Charge voltage is not

turned on due to the bad

contacts between power supply in the

side of the Developer and charge

terminal of HVPS.

1. No charge voltage
in the engine board.

Clean the high voltage charge
terminal.

1. Check the state of the connector
which connects the engine board
and HVPS.

2. Replace the HVPS if not solved
by the above direction 1 and 2.

Description : The printed image is dark.

Alignment and Troubleshooting

Service Manual

4-30

Samsung Electronics

3. Has the life span of the
developer ended?

4. Is the movement(Up and Down)
of the transfer roller smooth?

5. Is the HVPS normal?

2. Does recycle paper be used?

1. Does character exist less than

2% per a page, and has not it been

used long time?

The toner cartridge is basically
designed to print 1,500 sheets
with 5% image.

Replace the developer when the
life span of it has been ended.

The A/S is not guaranteed if using
recycle paper.

If the problem is still not solved,
replace the developer.

Clean the bushing part of the
transfer roller.

7) Background

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

Alignment and Troubleshooting

Service Manual

4-31

Samsung Electronics

8) Ghost (1)

3. The life of developer is expired.

4. Transfer roller lifetime

(50.000 sheets) has expired.

5. Abnormal low temperature
(below 10℃).

2. Bad contacts

caused by contamination

from toner particles between high

voltage terminal in the main body and the

one in the HVPS board.

1. Bad contacts

caused by contamination from

toner particles between high voltage

terminal in the main body and the

electrode of the

Developer.

Clean the terminals when
contaminated by toner particles.

Replace the engine board if not
solved by the above directions 1-2.

Occur in the developer cartridge,
replace the developer and try to
print out.

Wait about 1 hour after power on
before using printer.

If not solved by the direction 3,
check the transfer roller lifetime
and replace it.

62.9mm

Description : Ghost occurs at 62.9 mm intervals of the OPC drum in the whole printing.

Alignment and Troubleshooting

Service Manual

4-32

Samsung Electronics

When printing on card stock

thicker than normal paper or

transparencies such as OHP, higher

transfer voltage is

required.

Select 'Thick Mode' on paper type
menu from the software application
and after using returning to the
original mode is recommended.

62.9mm

9) Ghost (2)

Description : Ghost occurs at 62.9 mm intervals of the OPC drum in the whole printing.

(When printing on card stock or transparencies using manual feeder)

Alignment and Troubleshooting

Service Manual

4-33

Samsung Electronics

1. The life of the developer

may be expired.

2. The abnormal voltage and

bad contact of the terminal of the

supply roller

Occur in the developer cartridge,
replace the developer and try to
print out.

Check the approved voltage of the

supply roller and contact of the
terminal and adjust if necessary.

47mm

10) Ghost (3)

Description : White ghost occurs in the black image printing at 47 mm intervals.

Alignment and Troubleshooting

Service Manual

4-34

Samsung Electronics

The temperature of the fuser

is maintained high.

Disassemble the fuser and
remove the contaminated toner
particles on the roller and clean
the foreign matter between

Thermistor and Heat roller.

( Caution : can be deformed)

47mm

11) Ghost (4)

Description : Ghost occurs at 47 mm intervals.

Alignment and Troubleshooting

Service Manual

4-35

Samsung Electronics

1. Toner leakage due to

improperly sealed developer.

Replace the toner cartridge.

12) Stains on the Face of Page

Description : The background on the face of the printed page is stained.

Alignment and Troubleshooting

Service Manual

4-36

Samsung Electronics

1. Transfer roller is contaminated.

Print 2 or 3 times. Run Self-Test to
remove the contamination of the
transfer roller.

2. Pressure roller is contaminated.

1. Replace the transfer roller if
contaminated severely.

2. Disassemble the fuser and clean
the H/R(Heat Roller) and P/R
(Pressure roller). And check the

area between H/R and

Thermistor. If contaminated,
clean the area not to be deformed.

13) Stains on Back of Page

Description : The back of the page is stained at 39.2 mm intervals.

Alignment and Troubleshooting

Service Manual

4-37

Samsung Electronics

14) Blank Page Print out (1)

Bad ground contacts in

OPC and/or developer.

Remove contamination of the
terminals of the developer and
the unit.

Description : Blank page is printed.

Code Error message

A3-3112 SMART PANEL:Actuator Sensor Failure #A3-3112:Turn off then on.
C1-1110 SMART PANEL:Prepare new toner cartridge
C1-1120 SMART PANEL:End of life, Replace with new toner cartridge
C1-1130 SMART PANEL:End of life, Replace with new toner cartridge
C1-1411 SMART PANEL:Toner cartridge is not installed. Install the cartridge.
C1-1512 SMART PANEL:Toner cartridge is not compatible. Check users guide
M1-1113 SMART PANEL:Paper jam in tray 1.
M2-1211 SMART PANEL:

S2-4110 SMART PANEL:Door is open. Close it.
U1-1211

U1-2121
U2-1112 SMART PANEL:LSU Unit Failure: #U2-1112. Turn off then on.

U2-1114 SMART PANEL:LSU Failure: #U2-1114. Turn off then on.

SMART PANEL:Fuser Unit Failure : #U1-1211.
Turn off then on.

SMART PANEL:Fuser Unit Failure : #U1-2121.
Turn off then on.

• Code:A3-3112

• Error message:

SMART PANEL:Actuator Sensor Failure #A3-3112:Turn off then on.

• Symptom/Cause:

1. The thermistor is open.

2. The thermistor harness is short.

3. The main board is defective.

ED:2010-04-08 Samsung Eletronics

2

• Trouble Shooting Method:

1. Remove the both side cover.

2. Remove the screw from the rear.

3. Remove the Cover-Top.

4. Remove the Cover-Exit.

ED:2010-04-08 Samsung Eletronics

3

5. Remove the metal plate after unplugging the fuser connector.

6. Replace the fuser unit after removing 1 screw.

7. The assembly is reverse order of disjointing.

ED:2010-04-08 Samsung Eletronics

4

• Code:C1-1110

• Error message:

SMART PANEL:Prepare new toner cartridge

• Symptom/Cause:

1. The toner cartridge has reached its estimated cartridge life.

• Trouble Shooting Method:

1. Open the Cover-Exit.

2. Replace the toner cartridge.

3. Close the Cover-Exit.

ED:2010-04-08 Samsung Eletronics

5

• Code:C1-1120

• Error message:

SMART PANEL:End of life, Replace with new toner cartridge

• Symptom/Cause:

1. The toner cartridge has reached its estimated cartridge life.

• Trouble Shooting Method:

1. Open the Cover-Exit.

2. Replace the toner cartridge.

3. Close the Cover-Exit.

ED:2010-04-08 Samsung Eletronics

6

• Code:C1-1130

• Error message:

SMART PANEL:End of life, Replace with new toner cartridge

• Symptom/Cause:

1. The toner cartridge has reached its estimated cartridge life.
Print the supplies information report. And check the life count.

ED:2010-04-08 Samsung Eletronics

7

• Trouble Shooting Method:

1. Open the Cover-Exit.

2. Replace the toner cartridge.

3. Close the Cover-Exit.

ED:2010-04-08 Samsung Eletronics

8

• Code:C1-1411

• Error message:

SMART PANEL:Toner cartridge is not installed. Install the cartridge.

• Symptom/Cause:

1. The toner cartridge is installed improperly, or not installed.

• Trouble Shooting Method:

1. Open the Cover-Exit.

2. Reinstall the toner cartridge two or three times to confirm it is seated properly.

3. Close the Cover-Exit.

ED:2010-04-08 Samsung Eletronics

9

• Code:C1-1512

• Error message:

SMART PANEL:Toner cartridge is not compatible. Check users guide

• Symptom/Cause:

1. Ther toner cartridge is not suitable for your machine.

2. The print job can't be executed.

ED:2010-04-08 Samsung Eletronics

10

• Trouble Shooting Method:

1. Prepare the Samsung-genuine toner cartridge.

2. Open the Cover-Exit.

3. Replace the toner cartridge.

4. Close the Cover-Exit.

ED:2010-04-08 Samsung Eletronics

11

• Code:M1-1113

• Error message:

SMART PANEL:Paper jam in tray 1.

• Symptom/Cause:

1. Paper has jammed.
(The paper has not reached the feed1 sensor within normal time after picking up it from the tray.)

• Trouble Shooting Method:

1. Remove all papers on the tray. Remove the jammed paper from the machine. And reload the papers on the
tray.

2. Adjust the paper guide to fix the papers.

3. Check the maximum paper capacity of the tray. Remove excess paper from the tray.

ED:2010-04-08 Samsung Eletronics

12

• Code:M2-1211

• Error message:

SMART PANEL:

• Symptom/Cause:

1. Paper has jammed. (In case that the printer has turned on after turned it off for printing job or pick-up.)

• Trouble Shooting Method:

1. Open the top cover. Check if the paper has jammed. If there is the jammed paper, remove it.

2. If the error message in Smart Panel is not disappered, check the Regi sensor and actuator. If they are
defective, replace them.

ED:2010-04-08 Samsung Eletronics

13

• Code:S2-4110

• Error message:

SMART PANEL:Door is open. Close it.

• Symptom/Cause:

1. Error LED on the control pane is blinking because the main door is opened.

• Trouble Shooting Method:

1. Close the cover unit it locks into place.

2. If the problem persists, check the cover open sensor that is located on the HVPS board.

ED:2010-04-08 Samsung Eletronics

14

• Code:U1-1211

• Error message:

SMART PANEL:Fuser Unit Failure : #U1-1211.
Turn off then on.

• Symptom/Cause:

1. The fuser unit is defective.

2. The SMPS Triac is defective.

3. The main board is defective.
Using an incorrect type of paper may create a fusing error. Please use only paper that meets the specifications

required by the machine.

ED:2010-04-08 Samsung Eletronics

15