Samsung ML-1910, ML-1915, ML-2525, ML-2525W, ML-2580N Service Manual

Service Manual

1. Speed

• ML- 2525/2525W/2580N : 24 ppm in A4

• ML- 1910/1915 : 18 ppm in A4

2. Processor

• Jupiter4e 150 Mhz

• Chorus3 360 Mhz (Only 2525W, 2580N)

3. Printer Language Emulations

• SPL, PCL6 (Only 2580N)

The keynote of Product

Laser Printer

ML-1910/1915
ML-2525/2525W/2580N

4. Memory

• 8 MB / 64 MB (Only 2525W, 2580N)

5. Interfaces

• One USB port

• One 10/100 BaseT network connector (2580N)

• One IEEE 802.11 b/g wireless LAN (2525W)

6. Toner cartridge

• Initial : 0.7K (1910/ 1915) / 1K (2525/2525W/2580N)

• Sales : 1.5K / 2.5K two types

GSPN (Global Service Partner Network)

North America : service.samsungportal.com
Latin America : latin.samsungportal.com
CIS : cis.samsungportal.com
Europe : europe.samsungportal.com
China : china.samsungportal.com
Asia : asia.samsungportal.com
Mideast & Africa : mea.samsungportal.com

ⓒ

Samsung Electronics Co.,Ltd. February. 2008
Printed in Korea.

VERSION NO. : 1.00 CODE : 2580-00000E

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 …………………………………… 2-9

2.2 System Overview ………………………………………………… 2-10

2.2.1 Front View …………………………………………………… 2-10

2.2.2 Rear View …………………………………………………… 2-11

2.2.3 System Layout ……………………………………………… 2-12

2.2.4 Engine H/W Specications ………………………………… 2-19

2.2.5 Engine F/W Contol Algorithm ……………………………… 2-27

2.2.6 S/W Descriptions …………………………………………… 2-29

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 Front Cover ………………………………………………… 3-3

3.3.2 Top Cover …………………………………………………… 3-3

3.3.3 Rear Cover …………………………………………………… 3-4

3.3.4 Right Cover ………………………………………………… 3-5

3.3.5 Left Cover …………………………………………………… 3-6

3.4 Fuser Unit ………………………………………………………… 3-7

3.4.1 Whole Fuser Unit …………………………………………… 3-7

3.4.2 Main Service parts of Fuser Unit ………………………… 3-8

3.4.3 Replacing the Main Service part of Fuser Unit …………… 3-10

3.5 LSU Unit …………………………………………………………… 3-18

3.6 OPE PBA ………………………………………………………… 3-19

3.7 Drive Unit ………………………………………………………… 3-19

3.8 FAN ………………………………………………………………… 3-20

3.9 Transfer Roller …………………………………………………… 3-21

3.10 Main PBA and SMPS/HVPS board …………………………… 3-22

3.11 Pick up roller …………………………………………………… 3-25

3.12 Cassette holder pad …………………………………………… 3-26

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 ……………………………………………… 4-6

4.1.5 Periodic Defective Image …………………………………… 4-10

4.1.6 How to use DCU …………………………………………… 4-11

4.1.7 EDC Mode …………………………………………………… 4-16

4.1.8 Firmware upgrade …………………………………………… 4-19

4.1.9 Using the smart panel program …………………………… 4-20

4.2 Troubleshooting…………………………………………………… 4-22

4.2.1 Procedure of Checking the Symptoms …………………… 4-22

4.2.2 Bad discharge ……………………………………………… 4-25

4.2.3 Malfunction …………………………………………………… 4-30

4.2.4 Bad image …………………………………………………… 4-36

4.2.5 Network problems and solutions (Only ML-2580N) ……… 4-52

4.2.6 Fuser Problems and solutions …………………………… 4-54

chapter 5 System Diagram

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

5.2 Connection Diagram……………………………………………… 5-4

Contents

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

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

* Please see the attached.

Power Cord ………………………………………………………… 2

Thumbnail …………………………………………………………… 3

1. Main ……………………………………………………………… 4

2. Top Cover ………………………………………………………… 6

3. Cover …………………………………………………………… 8

Contents

4. Front Cover ……………………………………………………… 10

5. Rear Cover ……………………………………………………… 12

6. Main Frame ……………………………………………………… 14

7. Main Drive Bracket (ML-1910) ………………………………… 18

8. Main Drive Bracket (ML-2580N) ……………………………… 20

9. Base Frame-Pick Up …………………………………………… 22

10. Fuser …………………………………………………………… 24

11. Cassette ………………………………………………………… 26

Precautions

1. Precautions

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

1.1 Safety Warning

(1) Only to be serviced by appropriately qualied service engineers.

High voltages and lasers inside this product are dangerous. This printer should only be serviced by a

suitably trained and qualied service engineer.

(2) Use only Samsung replacement parts

There are no user serviceable parts inside the printer. Do not make any unauthorized changes or

additions to the printer, these could cause the printer to malfunction and create electric shock or re haz-

ards.

(3) Laser Safety Statement

The Printer 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 con-forming to the
requirements of IEC 825. Class I laser products are not considered to be hazardous. The laser system
and printer are designed so there is never any human access to laser radiation above a Class I level

during normal operation, user maintenance, or prescribed service condition.

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

Scanner assembly. The 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 injury to persons.

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Samsung Electronics

Precautions

Service Manual

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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 Drum cartridge and Toner Cartridge away from children. The toner powder contained in the

Drum cartridge 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 re.

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

electric shock.

(2) Use only the power cable supplied with the printer. 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 printer, this can cause electric shock. Do not allow

paper clips, pins or other foreign objects to fall into the printer these could cause a short circuit leading to

an electric shock or 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 printer remove the power plug from the wall socket.

(6) Use caution when inserting or removing the power connector. The power connector must be inserted

completely otherwise a poor contact could cause overheating possibly leading to a re. When removing
the power connector grip it rmly and pull.

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

wise damaged. Do not place objects on top of the power cable. If the power cable is damaged it could

overheat and cause a re or exposed cables could cause an electric shock. Replace a damaged power

cable immediately, do not reuse or repair the damaged cable. Some chemicals can attack the coating on

the power cable, weakening the cover or exposing cables causing 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 lightening storms. Samsung recommend that this machine be disconnected

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

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

machine near a humidier. Damp and dust build up inside the machine can lead to overheating and
cause a re.

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

possibly leading to the printer failing to work properly and in extreme conditions could lead to a 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

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Samsung Electronics

1.2.3 Handling Precautions

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

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

cause the printer to tip or fall.

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

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 printer

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 printer in such areas.

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

1.2.4 Assembly / Disassembly Precautions

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

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

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

the mainboard or network card is replaced.
(2) Ensure that power is disconnected before servicing or replacing any electrical parts.
(3) Disconnect printer interface cables and power cables.
(4) Only use approved spare parts. Ensure that part number, product name, any voltage, current or

temperature rating are correct.

(5) When removing or re-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 mins can damage the surface? photoconductive properties
and will result in print quality degradation. Take extra care when servicing the printer. Remove the
OPC Drum and store it in a black bag or other lightproof container. Take care when working with the
covers(especially the top cover) open as light is admitted to the OPC area and can damage the OPC

Drum.

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

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

Precautions

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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 6.55kg (ML-1910/1915) / 6.6kg (ML-2525/2525W/2580N) 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 6.55kg (ML-1910/1915) / 6.6kg (ML-2525/2525W/2580N), ensure the printer is

installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip

or fall possibly causing personal injury or damaging the printer.

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

is stable.

Precautions

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1.3 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

ML- 1915 / 2525 / 2525W ML- 1910 / 2580N

1. Speed

• ML- 2525/2525W/2580N : 24 ppm in A4

• ML- 1910/1915 : 18 ppm in A4

2. Printing Resolution

• Max. 1200x600 dpi effective output

(ML-1910/1915/2525)

• Max. 1200x1200 dpi effective output

(ML-2525W/2580N)

3. Processor

• Jupiter4e 150 Mhz

• Chorus3 360 Mhz (Only 2525W, 2580N)

4. Printer Language Emulations

• SPL , PCL6 (Only 2580N)

5. Memory

• 8 MB

• 64 MB (Only 2580N)

6. Interfaces

• One USB port

• One 10/100 BaseT network connector
(2580N)

• One IEEE 802.11 b/g wireless LAN (2525W)

7. Control Panel

• No LCD, 3 keys and 2 LEDs

• No LCD, 2 keys and 3 LEDs (only 2525W)

8. Toner cartridge

• Initial : 0.7K (1910/ 1915)

1K (2525/2525W/2580N)

• Sales : 1.5K / 2.5K two types

9. Color

• There are two kinds of colors.

(Gray and Black)

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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 ML-1910 / 1915 ML-2525 / 2525W / 2580N

Engine Speed Simplex Up to 18 ppm in A4 (19 ppm in Letter) Up to 24 ppm in A4 (24 ppm in Letter)

Duplex Manual Manual

Warmup time From Sleep 30 sec 30 sec

FPOT From Ready 10 sec 9 sec

From Sleep less than 28 sec less than 19 sec

Resolution - Up to 1,200 x 600 dpi effective output - 2525

Up to 1200 x 600 dpi effective output

- 2525W/2580N

Up to 1200 x 1200 dpi effective outpu

Product spec and feature

Service Manual

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Samsung Electronics

2.1.2.2 Controller & S/W

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Processor Jupiter4e 150 MHz - 2525 : Jupiter4e 150 MHz

- 2525W/2580N : Chorus3 360 MHz

Memory Std. 8 MB - 2525 : 8 MB

- 2525W/2580N : 64 MB

Option N/A N/A

Printer

Languages

- SPL(Samsung Printer Language) - 2525/2525W : SPL(Samsung Printer

Language)

- 2580N : SPL, PCL6, IBM ProPrinter,
EPSON

Fonts - Windows Fonts - 2525/2525W : Windows Fonts

- 2580N : 45 scalable, 1 bitmap, 136

PostScript3 fonts

Driver Default Driver SPL SPL

Install SPL - 2525/2525W : SPL

- 2580N : SPL, PCL6

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

Vista(32/64bits)/2003

Server(32/64bits)/

2008 Server(32/64bits)

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)

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

Vista(32/64bits),2008 Server(32/64bits)

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

Server(32/64bits)/

2008 Server(32/64bits)

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

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

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

Product spec and feature

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Samsung Electronics

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Wired Network Protocol N/A TCP/IP, Ethertalk, SNMP, HTTP 1.1

(Only 2580N)

Supporting OS N/A Windows NT4.0/2000/XP(32/64bits)/

2003 Server(32/64bits)/

Vista(32/64bits)/2008 Server(32/64bits)
Mac OS 8.6~9.2, 10.1~10.4

Various Linux OS including Red Hat
8~9, Fedora Core 1~4, Mandrake

9.2~10.1,

and SuSE 8.2~9.2
NetWare 5.x, 6.x (TCP/IP Only)

Unix HP-UX

Wireless Network Protocol N/A

Supporting OS N/A

Application Smart Panel SmartPanel for Windows/ Macintosh/

LINUX

SmartPanel for Windows/ Macintosh/
LINUX

Printer Setting N/A PSU for Windows/ Macintosh/LINUX

(Only 2580N)

Network
Management

N/A SyncThru Web Admin Service 4.5

(Only 2580N)

IP Setting SetIP SetIP

Interface

Parallel - N/A N/A
USB - Compatible with USB 2.0 Hi-Speed USB 2.0
Wired Network - N/A Ethernet 10/100 Base TX (Internal) :

Only 2580N

Wireless Network - N/A N/A

User Interface

LCD - N/A N/A
LED - 2 LEDs : Icon, No Text

- 2525/2580N

2 LEDs : Icon, No Text

- 2525W

3 LEDs : Icon, No Text

Key - 3 Keys 3 Keys (2525/2580N)

2 Keys (2525W)

Product spec and feature

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Samsung Electronics

2.1.2.3 Paper Handling

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Standard

Capacity

- 250-sheet Cassette Tray@80g/㎡,

1-sheet Manual Tray

250-sheet Cassette Tray@80g/㎡,
1-sheet Manual Tray

Max. Capacity - 251 sheets @ 80g/㎡ 251 sheets @ 80g/㎡
Printing Max. Size 216 x 356 mm (8.5" x 14") 216 x 356 mm (8.5" x 14")

Min. Size 76 x 127 mm (3.0" x 5.0") 76 x 127 mm (3.0" x 5.0")

Multi-purpose tray

Capacity Plain Paper 1 sheet 1 sheet

Envelop 1 sheet 1 sheet

Media sizes - A4, A5, A6, ISO B5, JIS B5, B6,

Statement, Letter, Quarto, Ocio, Folio,
Legal, Envelope(No 10, Monarch, DL,
C5, C6) Postcard

Media type - Plain, Thin, Bond, Punched, Pre-printed,

Recycled, Envelope, Transparency,
Label, Cardstock, Postcard, Letterhead,
Thick, Cotton, Colored, Archive

A4, A5, A6, ISO B5, JIS B5, B6,
Statement, Letter, Quarto, Ocio, Folio,
Legal, Envelope(No 10, Monarch, DL,
C5, C6) Postcard

Plain, Thin, Bond, Punched, Pre-printed,
Recycled, Envelope, Transparency,
Label, Cardstock, Postcard, Letterhead,
Thick, Cotton, Colored, Archive

Media weight - 16~43lb (60 to 163g/㎡) 16~43lb (60 to 163g/㎡)
Sensing - Manual Feed Sensor Manual Feed Sensor

Standard Cassette Tray

Capacity - 250 sheets @ 80g/㎡ 250 sheets @ 80g/㎡
Media sizes - A4, A5, A6, ISO B5, JIS B5, Executive,

Letter, Ocio, Folio, Legal,Custom

A4, A5, A6, ISO B5, JIS B5, Executive,
Letter, Ocio, Folio, Legal,Custom

Media types - Plain, Thin, Recycled, Thick, Archive Plain, Thin, Recycled, Thick, Archive
Media weight - 16~32lb (60 to 120g/㎡) 16~32lb (60 to 120g/㎡)
Sensing - Paper Empty Paper Empty

Optional Cassette Tray

Capacity - N/A N/A
Media sizes - N/A N/A
Media types - N/A N/A
Media weight - N/A N/A
Sensing - N/A N/A

Output Stacking

Capacity Face-Down 80 sheets @ 75g/㎡ NN Condition 80 sheets @ 75g/㎡ NN Condition

Face-Up N/A N/A

Output Full

- N/A N/A

sensing

Product spec and feature

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Samsung Electronics

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Duplex

Supporting - N/A N/A
Media sizes - N N
Media types - N N
Media weight - N N

Printable Area

Non-Printable
Area

Envelop 10mm(0.4") from edge(Top, Bottom,

Left, Right)

Other Media 4mm(0.16") from edge(Top, Bottom,

Left, Right)

2.1.2.4 Consumables

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Toner Black Standard / High Yield: Average Cartridge

Yield 1.5K / 2.5K standard pages.
(Ships with 700 pages Starter Toner
Cartridge)

Declared cartridge yield in accordance
with ISO/IEC 19752.

Key Electronic key(CRUM) Only Electronic key(CRUM) Only

Life detect Toner gauge sensor by dot count Toner gauge sensor by dot count

Drum Yield N/A N/A

10mm(0.4") from edge(Top, Bottom,
Left, Right)

4mm(0.16") from edge(Top, Bottom,
Left, Right)

Standard / High Yield: Average Cartridge

Yield 1.5K / 2.5K standard pages.
(Ships with 1,000 pages Starter Toner

Cartridge)

Declared cartridge yield in accordance
with ISO/IEC 19752.

2.1.2.5 Reliability & Service

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Printing Volume

(SET AMPV)

Max. Monthly Duty - 10,000 SHEET/month 12,000 SHEET/month
MPBF - 10,000 sheets 10,000 sheets
MTTR - 30 min. 30 min.
SET Life Cycle - 50,000 sheets or 5 years (whichever

RDS Comm. Mode N/A N/A

- 121 sheets/month - 2525 / 2525W : 166 sheets/month

- 2580N : 197 sheets/month

50,000 sheets or 5 years (whichever

comes rst)

Operation N/A N/A

comes rst)

Product spec and feature

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Samsung Electronics

2.1.2.6 Environment

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Operating
Environment

Acoustic Noise
Level(Sound
Power/Pressure)

Power
Consumption

Dimension

(W x D x H)

Weight SET 6.55Kg 6.6Kg

Temperature 10C to 32C 10C to 32C

Humidity 20% to 80% 20% to 80%

Printing 48dBA 48dBA

Standby Back Ground Level Back Ground Level

Sleep Back Ground Level Back Ground Level

Ready Less than 60W Less than 60W

AVG. Less than 350W Less than 350W

Max/Peak Less than 400W Less than 400W

Sleep / Power Off Less than 6.5W / Less than 0.8W

(Conformity to EPA)

SET 389 x 360 x 197 mm 389 x 360 x 197 mm

SET Packing 460 x 422 x 260 mm 460 x 422 x 260 mm

Toner 284 x 231.5 x 47.8mm 284 x 231.5 x 47.8mm

Toner Packing 400 x 366 x 204 mm 400 x 366 x 204 mm

Toner 0.7Kg 0.7Kg

Gross 8.81Kg 8.92Kg

Less than 6.5W / Less than 0.8W
(Conformity to EPA)

2.1.2.7 Packing & Accessory

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

In-Box - Driver & Network Install CD-ROM

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

Driver & Network Install CD-ROM
Power Cable USB Cable (CIS/China/
Korea/India) Quick Install Guide
Warranty Registration Card User’s
Manual (PDF File)

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Samsung Electronics

2.1.2.8 Options

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Memory N/A N/A

Second Cassette N/A N/A

Wired Network N/A External : Ethernet 10/100 Base TX (Only 2580N)

Wireless Network N/A Only 2525W

Hard Disk N/A N/A

Duplex Unit N/A N/A

2.1.2.9 Others

Items ML-1910 / 1915 ML-2525 / 2525W / 2580N

Memory Upgradable Mem. Slot N/A N/A

Upgradable Mem. T ype N/A N/A
Upgradable Mem. Unit N/A N/A

Sensor Paper Empty Yes Yes

Paper Size NO NO
Media T ype NO NO
Paper Full Yes Yes

2.1.2.10 Maintenance parts (FRU)

Item Image Part code Life

- 220V

: JC91-00945A

Fuser

Transfer Roller

: JC91-00945B

- 1 10V
: JC91-00946A
: JC91-00946B

JC66-01218A 50K

50K

Pick up Roller

Cassette holder pad JC90-00941A 50K

JC93-00087A 50K

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Samsung Electronics

2.1.3 Model Comparison Table

Samsung

ML- 2580N

Image

Speed 24 ppm (A4) 22 ppm (A4) 23 ppm (A4)

processor 360 Mhz 150 MHz 266 MHz

Memory 64 MB 8 MB 32 MB

Print Language SPL, PCL6 GDI PCL5e

Input

Duplex Manual Manual Manual

Interface USB 2.0 USB 2.0 USB 2.0

Size (mm) 389 x 360 x 197 353 x 298 x 213 mm 379 x 243 x 225 mm

250 sheets CST

1 Manual

Samsung

ML- 2240

150 sheets Bin

HP

P1505n

250 sheets Bin,

10 Manual

Toner Standard 1.5K / 2.5K Standard 1.5K Standard 2K

Product spec and feature

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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 Document output tray 6 Manual feeder
2 Control panel 7 Manual feeder guide
3 Front cover handle 8 Output support
4 Front cover 9 Toner cartridge
5 Tray 1

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Samsung Electronics

2.2.2 Rear View

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

1 Rear cover 3 USB port
2 Network Port

a. ML-2580 Series only.

a

4 Power receptacle

Product spec and feature

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2-12

Samsung Electronics

2

14

15

1

3

4

12

11

6

5

13

10

9

8

7

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.

1 Top out-bin delivery roller
2 Fusing roller
3 LSU
4 Toner Cartridge
5 Primary charging roller
6 Developer roller
7 Registration/Multipurpose pick up roller
8 Feed roller

9 Separation Pad

10 Pick up roller
11 Transfer roller
12 OPC
13 Cassette
14 Pressure roller
15 Fuser Exit roller

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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) Basic cassette

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: 250 sheets (75g/㎡ 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.

4) Registration roller

It has a paper arranging function, paper transferring function, paper detecting function, jam removing
function, and so on.

5) MP tray

It has a paper arranging function, paper transferring
function, jam removing function, and so on.

It uses manual feed method to feed 1 sheets of

general papers and 1 envelops.

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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 50,000 sheets (in15~30℃)

2.2.3.3 Driver Assy

- In ML- 1910- 2525/2580N, the driving device is consisted of BLDC or Step motor

(BLDC : 2580 / Step : 1910), OPC, Pick- up, Feed, Gear- Train connected with Mounting member.

• Driving Frequency: BLDCΦ55 Motor : 2400rpm(1800 Clock)

• It is a power delivery unit by gearing: BLDCΦ55 Motor - >Pickup/Feeder/Developer/Fuser/Duplex

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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 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 : 750 Watt ± 25 W

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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

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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

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Samsung Electronics

Cleaning Roller

Cleaning Blade

-720V

-350V

-550V

0.20mW

Max -1.4KV

-100V

1

2

3 4

5

6

7

8

+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 : ML-1910/1915

- 1K : ML-2525/2525W/2580N

→ Sales toner

- 1.5K / 2.5K

• 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.

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Samsung Electronics

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, and fan driving.
The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main board.

■ ML- 2580N

The Controller for ML-2580N comprises an ARM-based CPU (Chorus3), DDR2 SDRAM and Flash memories,
and other drivers for mechanical elements. The Controller also provides the interface with PC by USB2.0 and
Network.

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Samsung Electronics

■ ML- 2525

The Controller for ML-2525 comprises an ARM-based CPU (J4e), SDRAM and embedded Flash memories,
and other drivers for mechanical elements. The Controller also provides the interface with PC by USB2.0.

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■ ML- 1910/1915

The Controller for ML-1910/1915 comprises an ARM-based CPU (J4e), SDRAM and embedded Flash
memories, and other drivers for mechanical elements. The Controller also provides the interface with PC by
USB1.1.

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(a) Asic (Chrous3) – ML-2580N

• CPU Core : ARM1020E

- 32KB instruction cache and 32KB data cache

• Operating Frequency

- CPU Core : over 360MHz

- System Bus : 100MHz

• PCI Controller

- 32Bits, 33/66MHz

- PCI Local Bus Specication rev2.2 Complaint

- Host / Agent Mode (Support 4 Devices in Host Mode)

• NAND Flash Controller

- 8/16Bits, H/W EEC Generation

- Auto Boot Mode (Using Internal SRAM, 4KB)

• MAC

- 10M/100Mbps

- Full IEEE 802.3 Compatibility

• Engine Controller

- LSU Interface Unit

- Step Motor : 2 Channels

- PWM : 8 Channels

- ADC : 6 Channels

(b) Memory

• Flash Memory : It stores System Program and downloads the System Program through PC Interface, and

in case of model for export it compresses the PCL font, then stores it.

- Capacity : 8M Byte (NOR Flash)

- Access Time : 90ns

- Page read Time : 25ns

• DRAM : It is used as Swath Buffer, System Working Memory Area, etc. when printing.

It stores Font List, compressed into Flash memory, on DRAM and uses it as PCL font in case of model for
export.

- Capacity : 2580N : 64MB

- Type : DDR2 SDRAM 166MHz 16bit

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Samsung Electronics

(c) Sensor Input Circuit

■ Paper Empty Sensing

The Paper empty sensor on the HVPS detects the state of paper empty and the state of paper width
i.e. narrow paper width or not. If the paper width sensor fails to detect paper existence, the fact has two
meanings: paper empty or narrow paper installed.
When the printing job comes to CPU, CPU does operate the pickup action regardless of paper empty. If the
paper comes through to feed sensor, CPU recognizes the usage of narrow paper, if not, CPU know the state
of paper empty and displays the RED on the OPE PBA.

■ Regi Sensing

By the operation of an actuator on the frame, Regi Sensor (Photo interrupter) informs the existence of paper
to CPU. CPU recognize papers in Manual Feeder and , feed paper from Manual Feeder if there is.

■ Paper Feeding/With Toner Cartridge Sensing

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
RED color). The fact whether the developer is inserted or not is detected by CRUM. After the developer is
mounted, the sub- CRUM can read the information of toner cartridge from contact with CRUM involved in
toner cartridge. If the information of toner cartridge is invalid, it will show invalid sign on a LED.

■ Paper Exit Sensing

It detects paper state whether paper gets out from the set with operation of exit sensor and actuator on
the fuser assy. Paper detects the on/off time of exit sensor and the normal operation or jam information is
informed to the CPU.
The paper JAM2 is informed. (LED will be display RED color)

■ Cover Open Sensing

The Cover open sensor is located on the HVPS. After the front cover is opened, +24VS (DC fan, 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.

■ DC FAN / SOLENOID Driving

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

■ Motor Driving

The main motor driving circuits is on the BLDC Motor Ass’y Unit. Main Controller has the interfacing circuits.
There is motor driver IC on the motor control board of Motor Ass’y Unit.

Product spec and feature

Service Manual

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Samsung Electronics

Fuser

Fan

Inlet

24V

Switch

Main Board to

SMPS/HVPS

Exit

Sensor

Paper empty

Sensor

Feed

Sensor

Manual
Sensor

MHV OPC DEV SUP

THV

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 +5V and +24V.

Product spec and feature

Service Manual

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Samsung Electronics

■ HVPS Board

• Transfer High Voltage (THV+)

- Input Voltage : 24 V DC ± 15%

- Output Voltage : MAX +5.0KV ± 5 %,(Duty Variable, no loading )

-1.2KV ±15% (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 ~ 5 KV

- 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 high.

- 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 ~ - 600V 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 : - 400 V ~ - 800V 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.

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Samsung Electronics

■ SMPS Board

◆ Electrical Specications

Input Rated Voltage AC 230V(V2) / AC110V(V1)

Input Voltage uctuating range 180VAC~270VAC / 90VAC~135VAC

Rated Frequency 50/60 Hz

Frequency Fluctuating range 47 ~ 63 Hz

◆ Input / Output Connector

AC Input Connector (INLET1)

PIN ASSIGN PIN NO Description

1

AC_L

PIN ASSIGN PIN NO Description

SMPS -> Heater Controller (CON1)

1

AC_L

AC Input

2 AC_N

2 NC
3 AC_N

SMPS/HVPS Output Connector (CON2)

Pin Name No. No. Pin Name

nSENS_P_FEED 1 2 nSENS_P_EMPTY
GND 3 4 nSENS_P_REGI

+24V 5 6 +24V

GND 7 8 +5VS

+24VS 9 10 +24VS

GND 11 12 +24VS
GND 13 14 GND

+5.0V 15 16 +5.0V

THV READ 17 18 nSENS_P_EXIT

AC output

For Heater

Controller

PWM_THV 19 20 nTHV_EN

PWM_DEV_DC 21 22 PWM_MHV
FAN_MAIN 23 24 nRELAY_AC_OFF [High Active]

STANDBY [Low Active] 25 26 FUSER_ON [High Active]

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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

JAM 2

- 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)

- After the leading edge of the paper passes the feed sensor, the paper cannot reach the exit
sensor after certain time. (The exit sensor cannot be ON)

* The paper exists between the feed sensor and the exit sensor.

- After the trailing edge of the paper passes the feed sensor, the paper cannot pass the exit
sensor after certain time.

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.

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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.

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2.2.6 S/W Descriptions

2.2.6.1 Overview

The software of ML-2855ND 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.

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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).

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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

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Samsung Electronics

Disassembly and Reassembly

Service Manual

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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 2

6003-000261 SCREW-TAPTYPE;BH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,- 1

6003-000264 SCREW-TAPTYPE;PWH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,- 1

6003-000196

6003-000269 SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 5

6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 4

6006-001078 SCREW-TAPTYPE;PH,+,WSP,B,M3,L10,ZPC(WHT),SWRCH18A 1

6002-000308

6003-000196 SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 32

6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 2

6003-000269 Drive Main Bracket SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 7

6003-000264 Frame Base Pick up SCREW-TAPTYPE;PWH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,- 1

6003-000282 LSU SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 9

6003-000282 LSU Sub LD SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 2

6003-000196 Cover-Top SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 5

6003-000264 Cover-Front SCREW-TAPTYPE;PWH,+,-,B,M3,L6,ZPC(WHT),SWRCH18A,- 3

6003-000282 Toner Cartridge SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 10

6003-000002

6003-000196 SCREW-TAPTYPE;PWH,+,B,M3,L10,NI PLT,SWRCH18A 11

Cassette

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

Fuser

SCREW-TAPTYPE;PH,+,-,B,M2.6,L6,ZPC(WHT),SWRCH18A,- 4

Frame Main

SCREW-TAPTYPE;PWH,+,B,M3,L10,CBLACK,SWRCH18A 8

6003-000269 SCREW-TAPTYPE;BH,+,-,S,M3,L6,ZPC(WHT),SWRCH18A,- 9

6003-000282 SCREW-TAPTYPE;BH,+,-,B,M3,L8,ZPC(BLK),SWRCH18A,- 4

6003-000301 SCREW-TAPTYPE;BH,+,S,M4,L6,ZPC(WHT),SWRCH18A 1

MainLine

Disassembly and Reassembly

Service Manual

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Samsung Electronics

3.3 Cover

3.3.1 Front Cover

1. Take off the cassette. 2. Take off the front cover by removing both hooks.

3.3.2 Top Cover

1. Open the front cover.

Remove 2 screws on front side.

Caution :
When replacing the top cover, the exit unit is easy to break way from the SET.
To prevent this, please remove the top cover from the rear to the front.

2. Open the rear cover.
Remove 2 screws on back side.
And lift the top cover up.

Disassembly and Reassembly

Service Manual

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Samsung Electronics

3.3.3 Rear Cover

1. Remove 5 screw on back side of printer.

2. Remove the rear cover.

Disassembly and Reassembly

Service Manual

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Samsung Electronics

1

2

3

4

5

1

2

3

4

Hook

Hook

Hook

Hook

1

2

3

4

5

1

2

3

4

Hook

Hook

Hook

Hook

3.3.4 Right Cover

1. Remove the front/rear/top cover.

2. Unlatch the hook in order as shown below and release the right cover.

Disassembly and Reassembly

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Samsung Electronics

2

Hook

1

2

3

4

5

1

Hook

Hook

Hook

4

3

2

Hook

1

2

3

4

5

1

2

3

4

5

1

Hook

Hook

1

Hook

Hook

Hook

4

3

3.3.5 Left Cover

1. Remove the front/rear/top cover.

2. Unlatch the hook in order as shown below and release the left cover.

Disassembly and Reassembly

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Samsung Electronics

3.4 Fuser Unit

3.4.1 Whole Fuser Unit

1. Remove the rear cover.

2. Remove 4 screws.

3. Unplug the 2 connectors from SMPS board and Main board.

4. Take off the Fuser unit.

Caution : Take care not to break the actuator-exit

Disassembly and Reassembly

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Samsung Electronics

3.4.2 Main Service parts of Fuser Unit

Photo Part code Part name

1 6107-001802 SPRING ES

2 4713-001212 (220V) LAMP-HALOGEN

3

4

5

6

JC39-00819A HARNESS FUSER JOINT

JC39-01082A HARNESS-FUSER AC

JC67-00415A CAP FUSER LAMP L

JC67-00414A CAP FUSER LAMP R

7

8

6107-001165 SPRING TS

JC66-02364A ACTUATOR EXIT

Disassembly and Reassembly

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Samsung Electronics

Photo Part code Part name

9 JC61-00581A HOLDER ACTUATOR

10

11

12

JC66-02365A LAVER LINK JAM L

JC66-02366A LEVER LINK JAM R

4712-001031 THERMOSTAT

13 JC61-03450A GUIDE-INPUT

14

15

JC61-03685A GUIDE CLAW

6107-001800 SPRING TS

16

17

JC72-40361A PMO ROLLER EXIT

JC61-70976A SPRING ETC FUSER EXIT

18 NYOGEL 788 0205-001003 GREASE BEARING

Disassembly and Reassembly

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Samsung Electronics

1

2

3

3.4.3 Replacing the Main Service part of Fuser Unit

3.4.3.1 Spring-Es

Separate it as take up the circle-area of Spring-Es from hook.

Disassembly and Reassembly

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Samsung Electronics

3.4.3.2 Actuator-Exit and Holder-Actuator

1. Lift up the checking point and push to right side,
and then disassemble.

Caution :
Do not touch the roller surface of fuser inside

2. Disassemble Actuator-Exit from Holder-Actuator.

3. Disassemble Spring-Ts from the actuator.

Disassembly and Reassembly

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3.4.3.3 Cap-Fuser lamp R/Cap-Fuser Lamp L

Press the hook end of latch away from the cover-fuser to which it is latched and separate it

- Cap-Fuser Lamp L

- Cap-Fuser Lamp R

Caution : Don’t bend the stud

Disassembly and Reassembly

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Samsung Electronics

3.4.3.4 Lamp Halogen

1. Pull out the harness (Harness-Fuser Joint, Harness-Fuser AC) which is connected at Fuser Lamp
Halogen. And loose the two screws ( Left side, Right side each one ) in the red circle.

2. Release the Lamp Halogen.

Disassembly and Reassembly

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Samsung Electronics

3.4.3.5 Harness-Fuser Joint and Harness-Fuser AC

1. Pull out the connected part from L (Refer to 3.4.3.4 Lamp-Halogen disassemble method).

2. Pull out the connected part from Thermostat. And separate the harness from the Fuser.

3.4.3.6 Thermostat

Loose the two screws in the red circle and separate it.

Disassembly and Reassembly

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Samsung Electronics

3.4.3.7 Lever Link Jam R/ Lever Link Jam L

After removing the E-ring and Washer-Plain , separate the lever.

- Cap-Fuser Lamp R

- Cap-Fuser Lamp L

Disassembly and Reassembly

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Samsung Electronics

3.4.3.8. Guide Input

After loose the xed one screw on Guide Input, Disassemble it.

3.4.3.9. Pmo Roller Exit / Spring Etc Fuser Exit

1. Disassemble Spring-Etc Fuser Exit.

Caution :
Do not touch the roller surface of fuser inside

2. Disassemble Pmo-Roller Exit.

Disassembly and Reassembly

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Samsung Electronics

3.4.3.10 Guide Claw / Spring Ts(6107-001800)

1. Disassemble Spring-Ts.

2. Turn around the Guide-claw.

3. Keep holding and push to underneath.

Caution :
Do not touch the roller surface of fuser inside.

Disassembly and Reassembly

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Samsung Electronics

3.5 LSU Unit

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

2. Lift the LSU unit off by removing 3 screws and 2 connectors.

Disassembly and Reassembly

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Samsung Electronics

3.6 OPE PBA

1. Remove the top cover.

2. Remove 2 screws.

3. Take off the OPE PBA after unpluging
1 connector.

3.7 Drive Unit

1. Remove the left cover. (refer to 3.3 cover)

2. Remove 6 screws.

3. Take off the Drive Unit after removing
1 connector.

Note

Remove the motor of drive unit after removing
4 screws if necessary.

Disassembly and Reassembly

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Samsung Electronics

3.8 FAN

1. Remove the right cover. (refer to 3.3 cover)

2. Remove the FAN after removing 1 screw and 1 connector.

Disassembly and Reassembly

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Samsung Electronics

Transfer roller

3.9 Transfer Roller

1. Open the front cover.

2. Take out the toner cartridge.

3. Take off the transfer roller by release its right shaft from hook.

Cautions :
Don’t touch the surface of tranfer roller.

Disassembly and Reassembly

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Samsung Electronics

3.10 Main PBA and SMPS/HVPS board

1. Take out the Cassette unit.

2. Remove rear cover. (refer to 3.3.3 rear cover)

3. Remove 11 screws (bottom x 9 , rear x 2 ) and 1 connector.

4. Lift the board shield up slightly and unplug the connector as shown below.

Disassembly and Reassembly

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Samsung Electronics

5. Turn the shiled over as shown below.

6. Take off the SMPS/HVPS board after removing 6 screws and connector.

Disassembly and Reassembly

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Samsung Electronics

7. Take off the Main PBA after removing 4 screws and all connectors.

Disassembly and Reassembly

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Samsung Electronics

3.11 Pick up roller

1. Take out the Cassette unit.

2. Turn the printer over.

3. Remove 1 screw. Release the holder pick up by unlatching 2 hooks.

4. Turn and release the pick up roller.

Disassembly and Reassembly

3.12 Cassette holder pad

1. Take out the Cassette unit. 2. Take off the holder pad by unhooking both
latches.

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Samsung Electronics

Alignment and Troubleshooting

a

a

a

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-1910/2825/2850 series printers have 3 keys(1910/2525) or 2 keys (2580N) and 2 LEDs.
The ‘User Interface’ module handles the processing of the ‘Key Press’ and ‘LED control’ at different states of
the machine.

1

2

3

4

5

a. ML-1910 Series, ML-2525 Series only.

Service Manual

Jam Shows the status of jam occurance of your machine.

Online/ Error Shows the status of your machine.

Print Screen

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

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

Prints the displayed screen in the monitor.
* In ML-2580 Series, this button ( ) works differently. It prints a

demo page by pressing this button only.

4-1

Samsung Electronics

Alignment and Troubleshooting

Service Manual

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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.

• The machine is in power saver mode.
When data is received, it switches to on-line automatically.

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 lifea.

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.

• 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.

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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 front cover.

In tray 1

1. Open and close the front cover. The jammed
paper is automatically ejected from the machine.
If the paper does not exit, go to the next step.

2. Pull out tray.

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

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.

4. Insert tray back into the machine until it snaps
into place. Printing automatically resumes.

Alignment and Troubleshooting

Service Manual

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Samsung Electronics

1 Pressure lever

In the manual tray

1. If the paper is not feeding properly, pull the
paper out of the machine.

2. Open and close the front cover to resume
printing.

Inside the machine

1. Open the front cover and pull the toner cartridge
out, lightly pushing it down.

2. Remove the jammed paper by gently pulling it
straight out.

3. Insert the toner cartridge and close the front
cover. Printing automatically resumes.

Alignment and Troubleshooting

Service Manual

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Samsung Electronics

1 Pressure lever

1 Pressure lever

1 Pressure lever

In exit area

1. Open and close the front cover. The jammed
paper is automatically ejected from the machine.
If you do not see the jammed paper, go to next
step.

2. Gently pull the paper out of the output tray.

If you do not see the jammed paper or if there is
any resistance when you pull, stop and go to the
next step.

3. Open the rear cover.

4. Pull the pressure levers down and remove the
paper.
Return the pressure levers to their original
position.

5. Pull the fuser cover levers down and remove the
paper.
Return the fuser cover levers to their original
position..

6. Close the rear cover.

7. Open and close front cover, printing
automatically resumes.

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

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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 Cancel button, you can print these reports.

Report Description How to print

Printing demo page Print a demo page to make sure

that the machine is operating
correctly.

Printing conguration

sheet

Printing a cleaning
sheet

Printing a supply
information
report and event log
report.

Print a conguration page to view

current printer settings, or to help
troubleshoot printer problems.

If you are experiencing blurred or
smeared printouts, you can clear
the problem by printing a cleaning
sheet, provided by your machine.

Print a supply information report
to view supply life indicators and
event log report to view error log,
count.

In Ready mode, press and hold this button for
about 2 seconds until the status LED blinks
slowly, and release.

In Ready mode, press and hold this button for
about 5 seconds until the status LED blinks
fast, and release.

In Ready mode, press and hold this button for
about 8 seconds until the status LED blinks
fast, and release.

In Ready mode, press and hold this button for
about 10 seconds until the status LED blinks
fast, and release.

Alignment and Troubleshooting

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Samsung Electronics

■ Demo Page

Alignment and Troubleshooting

Service Manual

4-8

Samsung Electronics

■ Conguration Reprot

Alignment and Troubleshooting

Service Manual

4-9

Samsung Electronics

■ Supplies Information Report

Alignment and Troubleshooting

Service Manual

4-10

Samsung Electronics

7

6

1

5

2

3

4

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 75.6mm White and Black Spots
Developing Roller 35mm White spot, Horizontal black band
Charging Roller 37.5mm Black Spot and line and periodic band
Supply Roller 49mm Periodic Band by little difference of density
Transfer Roller 47mm 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 OPC 5 Tranfer roller
2 Developing Roller 6 Pressure roller
3 Charging roller 7 Fusing roller
4 Supply Roller

Alignment and Troubleshooting

Service Manual

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Samsung Electronics

ML SERIES DIAGNOSTIC CONTROL UNIT

04
05
07
08
09
10

DEV 300
LSU READY
PAPER EMPTY

COVER OPEN
COER HEATING

DEV 350
LSU MT & LD
PAPER WIDTH
EXIT SENSOR

PRINTING TEMP

DEV 350
LSU MOTOR

NEW CRU

FEED SENSOR

READY HEAT

ON OFF

STATUS

SELF

TEST

DIAGNOSTIC

DIAGNOSTIC CODE

00
01
02
03
04
05
06
07
08
09
10
11

12
13

14

61

00
01
02
03
04

20
30
40�
50

69

�

60�
62�
68�
64�
70�
71�
72�
73�
95

MAIN MOTOR OPERATING SYSTEM
MAIN HIGH-VOLTAGE ON
TRNSFER HIGH-VOLTAGE (-)ON
THV(+) REFERANCE VOLTAG E
DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON
LSU OPERATING SYSTEM

PICKUP CLUTCH ON
PEEMPTY/PWITH/NEW CRU TEST

FEED & EXIT SENSOR TEST
COVER OPEN SENSOR TEST
FUSER TEST
HOT BURN TEST

CLEAN MODE PRINT

THV(+)TRIGGER, ALL HV & FAN ON

THV(+) REFERENCE ON

ERROR STATUS CODE

STAT US CODE

WARM UP

READY (REGAL)
READY (LETTER)
READY (A4)
READY (EXECUTIVE)
READY (B5)

PRINT START
FEED SENSOR ON
FEED SENSOR OFF
PAPER OUT

SLEEP MODE

OPEN FUSER ERROR
LOW TEMPERATURE ERROR
OVER HEATING ERROR

COVER OPEN ERROR

NO PAPERR
PAPER JAM 0
PAPER JAM 1
PAPER JAM 2
LSU NOT READY

DIAGNOSTIC

MODE

DOWN

UP ENTER

SHIFT STOP

TO ENTER DIAGNOSTIC MODE, PUSH THREE BUTTONS SIMUL ANEOUSL

AND TURN THE PRINTER POWER ON.

4.1.6 How to use DCU

4.1.6.1 DCU Setup

You can examine the malfunction of the printer. To perform DCU, remove the rear cover and connect the
DCU on DCU con of the Main control board.

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Samsung Electronics

4.1.6.2 Code

Connect DCU to the printer and turn the power on. It show 7 Segment FND on the panel and each code tells

the function of the printer.

1) Normal Code

While printing or warming up, it indicate the position of the paper.

Code State Description

61 Warm up The printer is on, the cover is open or close.

00~05 Ready(kind of paper)

20, 21, 22 Print Start

30 Feed Sensor On The paper is passing out of the Feed Sensor.

The printer is ready, the paper is detected

00: Legal, 01: Letter, 02: A4, 03: EXEC, 04: B5, 05: Folio, 06: A5/A6

The engine controller received the print order from the video controller.

20: 1st, 21: MP, 22: SCF

40 Feed Sensor off The paper has passed out of the Feed Sensor.
50 Paper Out The paper has passed out of Exit Sensor.
69 Sleep Mode The fuser power turned off to minimize the power consumption.

2) Error Code

When detecting the malfunction, the printing is stopped to indicate error code.

Code State Description

The error in the fuser occurred. There is a short circuit in the thermistor
and the thermostat while printing, Low Temperature Error occurs.

60, 62, 68 Fuser Error

64 Cover Open The Printer Cover is open.
65 CRU Error The Toner Cartridge not installed.
70 No Paper No paper in the paper cassette.
71 Paper Jam 0 The front part of paper is jammed between pickup unit and Feed sensor.

72 Paper Jam 1

73 Paper Jam 2

• 60: Open Fuser Error

• 62: Low Heat Error

• 68: Over Heat Error

The front part of paper is jammed between the Discharge sensor and
Feed sensor.

The front part of paper is jammed just after passing through the discharge

sensor.
76 Out Bin Full The Out bin is lled with paper.
95 LSU Not Ready LSU Scanner Motor not ready or Hsync signal not output.

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Samsung Electronics

4.1.6.3 Self Diagnostic Mode

If Error code occurs due to malfunction of the printer, perform

Self Diagnostic Mode to solve the problem.
The printer works only in the self-test mode to solve the malfunction problem.
To enter the self-test mode, turn the power on pressing the buttons of [Down], [Shift] and [Stop] at the same
time.

Release the button within 2 or 3 seconds if 78 shows in the DCU. If 00 shows in the DCU, press the button [Up]

or [Shift] to select the self+test , and press the button of [Enter] to operate. To stop, press the button of [shift]
and [Enter] together.

Code Description

00

01

Main Motor Operating System

Only the main motor is in operation.

Main High Voltage On(THV-)

-1400 voltage output by MHV terminal.

Caution : High voltage probe should be used.

02

03

04

05

06

07

Transfer High Voltage(-)On(THV-)

-1000 voltage output by MHV terminal.

Caution : High voltage probe should be used.

Transfer High Voltage (+)Reference on (THV +)

+1300 voltage output by MHV terminal.

Caution : High voltage probe should be used.

DEV/supply High Voltage : DEV/Supply High Voltage Test.
The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply
high voltage output by each HV terminal. Press the [Up] button to switch the voltage. The
middle and right one of the three LEDs are on and -350 voltage output by DEV HV terminal.

Caution : High voltage probe should be used.

LSU Operating System

The scanning motor of LSU is in operation, the right LED of the three buttons on. Press the

[Up] button to Check LD. LD is functioning and the middle button is on. If the LD is normal,

all LEDs are on.

Pickup clutch on

The Solenoid in the printer is in operation. To stop the operation, Press the button [shift] and
[Enter] together.

Paper Empty Sensor Test :

If activate the Actuator of the PEMPTY Sensor, the left and right of the three LEDs are on.
Paper Empty Sensor ON/OFF 1st LED ON/OFF

08

09

Feed & Exit Sensor Test

Test the Feed sensor and Discharge sensor in the same way as ‘07’.
Feed Sensor ON/OFF 2nd LED ON/OFF
Exit Sensor ON/OFF 3rd LED ON/OFF

Cover Open Sensor Test

Test the Cover Open Sensor in th same way as code ‘07’
Cover Open Sensor ON/OFF 1st LED ON/OFF

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Code Description

Fuser Test

If the [Enter] button pressed, the right LED is on and temperature of the fuser is up to

10

READY Mode. If the [Up] button pressed, the middle LED is on and temperature of the fuser
is up to Printing Mode.
If you press the button once more, the left LED is on and temperature of the fuser is up to
overheat Mode.

Hot Burn Test

11

If the [enter] button pressed, the printer is continuously printing without detection.
Turn the power off to stop operation.

12

Cleaning Mode Print Mode

Print the paper to clean the OPC Drum in the Cartridge.

THV(+) TRIGGER. ALL HV :

13

All high voltage output by each HV terminal and LSU and the fan is in operation. In this
mode, electronic resistance of transfer roller and high voltage is detected.

14

15

16

17

PTL Test : (ML-1610 : not design)

Indicates the function of the PTL, same method of the code ‘07’.

Fan Test :

Indicates the function of the Fan, same method of the code ‘07’.

Manual Pickup Test :

Indicates the function of th Manual Pickup, same method of the code ‘07’.

Manual Sensor Test :

Indicates the function of the Manual Sensor, same method of the code ‘07’.

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No. Function Up/Down

00 Motor Motor Run Motor Stop

01 MHV Mhv On Mhv Off -1300V

-1000

-350V

020mV

V

02 THV(-) Thv Negative On Thv Negative Off

03 THV(+) Thv On Thv Off +1300V

04 DEV Dev On

Supply DEV

-350V

Dev Off

0 : -550V 0:

05 LS U LSU Run

On Off Ready

LSU Stop

06 PickUp Pickup On Pickup Off

07 PEmpt y

Paper Empty

08 Sensor

Exit Feed

09 Cover

Cover Open

10 Fuse r Fuser On Fuser Off

11 HotBurn HotBurn On

12 Clean Print Clean Printing

13

Thv

Reference

low adequate high

14 PTL PTL On P PTL No.TL Off

15 FAN Fan On Fan Off

16

Manual

PickUp

Manual Pickup On Manual Pickup Off

17

Manual

Senso r

Manual Sensor

Enter Stop Remark

4.1.6.4 Self Test Button

If the Self-Test button pressed, vertical lines are printed.

Turn the power on while pressing this button, ‘89’ shows in the DCU and the printer is warming up. After
warmingup the printer is in READY Mode, and ‘88’ shows in the DCU. In this mode, without any detection,
the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the

engine malfunction is detected in the control board.

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4.1.7 EDC Mode (Only ML-2580 )

■ Method to enter

1. Connect only one printer to the computer using USB cable.

2. Power up the printer and wait for the printer to nish initializing.

3. Start EDC utility.

4. To get out of the EDC Mode, Press the “Exit” button.

Press Menu Button.

* Use the only ML-2580 EDC program. Do not use the CLP-310 series EDC program.

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■ EDC Mode Menu

0. Cover Status

Item Description

Front Cover When the front cover opened, “Open” message display LCD. If the front

cover closed, “Closed” message display LCD.

1. Sensor Status

Item Description

Regi/Feed/Exit Sensor Manually open and close the actuator of the sensor [Regi, Feed, and/or

Exit Sensor] you wish to check, the message “Without Paper” and “With
Paper” message will be displayed.

Empty Manually open and close the actuator of the Empty Sensor, the message

“Present” and “Empty” message will be displayed.

2. Motor Test

Item Description

Main Mtr Nor. If “OK” key is pushed after “ON” displayed, motor will be run. Main motor

will auto - stop after 60 seconds and ”OFF” message will be displayed.

Slow If “OK” key is pushed after “ON” displayed, motor will be slowly run.

Main motor will auto - stop after 60 seconds and ”OFF” message will be

displayed.

3. Fan Test

Item Description

Fuser Fan If “OK” key is pushed after “ON” displayed, fan will be run. Fuser fan will

auto - stop after 10 seconds and ”OFF” message will be displayed.

4. Clutch Test

Item Description

Pick up Clutch When “OK” key is pushed after ”ON” message displayed, clutch turns on.

Pick up Clutch will be turn off after 3 seconds and ”OFF” message will be

displayed.

Regi Clutch When “OK” key is pushed after ”ON” message displayed, clutch turns on.

Regi Clutch will be turn off after 3 seconds and ”OFF” message will be

displayed.

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5. Fuser Ctrl

Item Description

Temp Control Fuser on and off. “ON” is selected, fuser will be active and display the

fuser temperature [XXX] but “OFF” is selected, fuser will be stop.

Fuser Temp. Fuser temperature displayed on LCD (example: [170] )

6. LSU Control

Item Description

LD Power When “OK” key is pushed after ”ON” message displayed, ”OFF” message

will be displayed after 10 seconds

LSU Motor If “OK” key is pushed after “ON” displayed, motor will be run. LSU motor

will auto - stop after 10 seconds and ”OFF” message will be displayed.

LSU Ready If “OK” key is pushed after “ON” displayed, motor will be run. ”1” message

will be displayed.

Hsync If “OK” key is pushed after “ON” displayed, motor will be run. ”1” message

will be displayed.

7. DEV Control

Item Description

THV (+) If “OK” key is pushed after “ON” displayed, THV (+) will be turned on.
THV (-) If “OK” key is pushed after “ON” displayed, THV (-) will be turned on.
Dev Bias If “OK” key is pushed after “ON” displayed, Dev Bias will be turned on.
MHV Bias If “OK” key is pushed after “ON” displayed, MHV Bias will be turned on.

■ ACRONYMS AND Explanation

• DEV – Developing High Voltage

• EDC – Embedded Diagnostic Control

• F/W – Firmware

• HVPS – High Voltage Power Supply

• H/W – Hardware

• LD – Laser Diode

• LSU – Laser Scanning Unit

• MHV – Main High Voltage (Charge Voltage)

• OPC – Optical Photo Conductor

• SCF – Second Cassette Feeder

• THV – Transfer High Voltage

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4.1.8 Firmware upgrade

1. In DOS prompt types “Usbprns [rom le name]” and press enter.

ML-1910
ML-2525

Normal

Download

method

ML-2580

ML-1910
ML-2525

Boot

Download

method

ML-2580

2. When download start, LED behavior will be as bellow.

- Erase: Error(red) status LED will be on.

- Write: Ready and error status LED will be both on(orange).

3. When download complete automatically power off/on.

1. In DOS prompt types “Usblist2 [rom le name]” and press enter.

2. When download mode start, LED behavior will be as bellow.

- Erase & Write: Status (orange) and JAM(orange) LED will be both blink.

3. When download complete automatically power off/on.

1. Press ‘Stop’ key when power on

2. When boot download mode ready, LED behavior will be as bellow.

- Ready(green) and error(red) status LED will be blink.

3. In DOS prompt types “Usbprns [rom le name]” and press enter.

4. When download start, LED behavior will be as bellow.

- Erase: Error(red) status LED will be on.

- Write: Ready and error status LED will be both on(orange).

5. When download complete automatically power off/on.

1. Press ‘Stop’ key when power on

2. When boot download mode ready, LED behavior will be as bellow.

- Status (orange) and JAM(orange) LED will be on.

3. In DOS prompt types “Usblist2 [rom le name]” and press enter.

4. When download start, LED behavior will be as bellow.

- Erase & Write: Status (orange) and JAM(orange) LED will be both blink.

5. When download complete automatically power off/on.

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4.1.9 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.

4.1.9.1 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.

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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

Printer Setting

4

(ML-2580 Series only)

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.

4.1.9.2 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.

4.1.9.3 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.

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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.

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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

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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.

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1. Check the Solenoid by using
DCU diagnostic mode 06.

2. Check if the holder pad in the

cassette is worn away.

3. Check the surface of the

roller-pick up is contaminated.

4. If the paper

feeds into the printer rand

Jam 0 occurs, perform DCU to check

feed-sensor of the

engine board.

Replace the solenoid.

Replace the holder pad.

Clean with soft cloth dampened

with IPA(Isopropyl Alcohol) or
replace the pick up roller.

Replace the Sensor.

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.

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1. If the recording paper is

jammed in front of or inside the fuser.

(Perform DCU diagnostic

code 08)

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 SMPS.

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.

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2. Check the Exit roller is

transformed or contaminated.

1. If the paper is

rolled in the Fuser Roller:

- This occurs when a Guide claw is
broken away or transformed.

- It occurs when the Heat-Roller or
Pressure-Roller is seriously

contaminated
with the toner.

Refer to JAM2 flow chart
in fuser problem troubleshooting.

Replace the Exit roller.

3) JAM 2

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

2. Recording paper is stuck in the discharge roller and in the fuser just after

passing through the Actuator-Feed.

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1. Solenoid malfunction

(the solenoid does not work properly):

Perform DCU Diagnostic

Code 06.

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).

4) Multi-Feeding

Description : Multiple sheets of paper are fed at once.

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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.

5) Paper rolled on the OPC Drum

Description : Paper is rolled up in the OPC.

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1. Bending or deformation of

the actuator of the paper sensor.

2. The function of the engine

board is defective Perform DCU mode :

Perform DCU diagnostic

code 8.

Replace the defective actuator.

Replace the engine board.

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.

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1. Bending or deformation of

the actuator of the paper sensor.

2. The function of the engine

board is defective Perform. DCU mode :

Perform DCU diagnostic

code 8.

Replace the defective actuator.

Replace the engine board.

2) Paper Empty without indication

Description : The paper lamp on the operator panel does not come on when the paper cassette

is empty.

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1. Check the connector

and circuit of the cover switch

department in the Main Control board.

Perform DCU mode : If Error state

'64' occurs, Check the related

codes of the Cover

Open Error

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

2. Replace the Main Control board
or Cover Open S/W.

3) No lamp on when the cover is open

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