Samsung SCX-4600, SCX-4623 Service Manual and Parts Catalog

Service Manual

1. Print / Copy Speed

• 22 ppm in letter

2. Processor

• Jupiter5 375 Mhz

3. Printer Language Emulations

• SPL, PCL-5 (4623FW)

4. Memory

• 64 MB (4600/4623F)

The keynote of Product

• 128 MB (4623FN)

• 256MB (4623FW)

Mono Laser MFP

SCX-4600/SCX-4623 series SCX-4600/4623F/FN/FW

5. Interfaces

• One USB port

• One 10/100 Base TX network connector (4623FN)

• One 802.11b/g/n wireless module (4623FW)

6. Toner cartridge

• Initial : 0.7K / 1K

• Sales : 1.5K / 2.5K two types

7. ADF (4623 series)

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. August. 2009 Printed in Korea.

VERSION NO. : 1.00 CODE : 4600-00000E

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

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 ……………………………… 2-28

2.2.6 S/W Descriptions …………………………………………… 2-30

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 ……………………………………………………………… 3-4

3.3.1 Front Cover ………………………………………………… 3-4

3.3.2 Rear Cover …………………………………………………… 3-4

3.3.3 Right/Left Cover …………………………………………… 3-5

3.4 Scanner and ADF ………………………………………………… 3-6

3.4.1 ADF unit ……………………………………………………… 3-6

3.4.2 ADF roller …………………………………………………… 3-7

3.4.3 OPE Unit……………………………………………………… 3-8

3.4.4 Platen unit …………………………………………………… 3-8

3.4.5 CIS unit ……………………………………………………… 3-9

3.5 Middle Cover ……………………………………………………… 3-10

3.6 Fuser Unit ………………………………………………………… 3-12

3.6.1 Whole Fuser Unit …………………………………………… 3-12

3.6.2 Main Service parts of Fuser Unit ………………………… 3-13

3.6.3 Replacing the Main Service part of Fuser Unit …………… 3-15

3.7 LSU ………………………………………………………………… 3-22

3.8 Main PBA ………………………………………………………… 3-24

3.9 Drive unit ………………………………………………………… 3-25

3.10 Solenoid ………………………………………………………… 3-26

3.11 FAN ……………………………………………………………… 3-26

3.12 Transfer Roller ………………………………………………… 3-27

3.13 SMPS/HVPS board …………………………………………… 3-28

3.14 Pick up roller …………………………………………………… 3-30

3.15 Cassette holder pad …………………………………………… 3-30

3.16 Wireless LAN PBA (Only SCX-4623FW) …………………… 3-31

chapter 4 Alignment and Troubleshooting

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

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

4.1.2 Understanding the Status LED …………………………… 4-4

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

Contents

4.1.4 Paper Path …………………………………………………… 4-10

4.1.5 Menu Map …………………………………………………… 4-11

4.1.6 Tech Mode …………………………………………………… 4-12

4.1.7 EDC Mode …………………………………………………… 4-19

4.1.8 Firmware Upgrade ………………………………………… 4-22

4.1.9 Periodic Defective Image …………………………………… 4-23

4.1.10 Error Message ……………………………………………… 4-24

4.2 Troubleshooting…………………………………………………… 4-28

4.2.1 Procedure of Checking the Symptoms …………………… 4-28

4.2.2 The cause and solution of Bad image …………………… 4-29

4.2.3 The cause and solution of the bad discharge …………… 4-45

4.2.4 The cause and solution of the malfunction ……………… 4-52

4.2.5 The cause and solutions of

bad environment of the software ………………………… 4-61

4.2.6 Fax & Phone Problems …………………………………… 4-64

4.2.7 Copy Problems ……………………………………………… 4-73

4.2.8 Scanning Problems ………………………………………… 4-77

4.2.9 Fuser Problems and solutions …………………………… 4-80

chapter 5 System Diagram

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

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

FW Connection Diagram ………………………………………… 5-3

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 The Sample Pattern for the Test ………………………………… 6-8

Contents

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

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

attached Exploded Views & Parts List-OK

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 technician.

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

qualied service technician.

(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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Precautions

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1.2 Caution for safety

1.2.1 Toxic material

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

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

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

(2) Please keep 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 “Material

Safety Data” sheets are available online at www.samsung.com.

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, ensure the power switch is turned off rst then 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, or in front of an air conditioner. Damp and dust build up inside the machine can lead to overheating and cause a re, or cause parts to rust.

(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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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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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.).

(3) When you move the printer.

This printer weighs 23.34 lbs (SCX-4600 series) / 25.44 lbs (SCX-4623F/FN) 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 23.34 lbs (SCX-4600 series) / 25.44 lbs (SCX-4623F/FN), 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 specication and feature

2. Product specication and feature

2.1 Product Specications

2.1.1 Product Overview

SCX-4600 series (3 in 1) SCX-4623 series (4 in 1)

1. Print / Copy Speed

• 23 ppm in letter

2. Processor

• Jupiter5 375 Mhz

3. Printer Language Emulations

• SPC, PCL-5 (4623FW)

4. Memory

• 64 MB (4600/4623F)

• 128 MB (4623FN)

• 256MB (4623FW)

5. Interfaces

• One USB port

• One 10/100 Base TX network connector (4623FN)

• One 802.11b/g/n wireless module (4623FW)

6. Toner cartridge

• Initial : 0.7K / 1K

• Sales : 1.5K / 2.5K two types

7. ADF (4623 series)

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Product specication and feature

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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 Specications

Items SCX-4600 series SCX-4623 Series

Net Dimension (W x D x H)

Weight with Consumables

LCD 2 line x 16 characters 2 line x 16 characters

Memory 64MB SCX-4623F : 64MB

Interface Hi-Speed USB 2.0 Hi-Speed USB 2.0

OS Compatibility ***** Windows 2000(32bit)/XP(32/64bit)/2003

WHQL Windows 2000, XP, 2003 Server,

416 x 409 x 275.8 mm (16.4 x 16.1 x 10.9 inches)

10.59 Kg (23.34 lbs) SCX-4623F/FN : 11.54 Kg (25.44 lbs)

Server(32/64bit)/Vista(32/64bit) Various Linux OS including Red Hat 8~9, Fedora Core 1~4, Mandrake 9.2~10.1, and SuSE 8.2~9.2 Mac 10.3, 10.4, 10.5

Vista(32/64bits)

416 x 415.4 x 318.9 mm (16.4 x 16.4 x 12.6 inches) * SCX-4623FH : Without hand set

SCX-4623FN : 128 MB SCX-4623FW : 256 MB

Ethernet 10/100 Base TX (SCX-4623FN)

802.11b/g/n WLAN (SCX-4623FW)

Windows 2000(32bit)/XP(32/64bit)/2003 Server(32/64bit)/Vista(32/64bit) Various Linux OS including Red Hat 8~9, Fedora Core 1~4, Mandrake 9.2~10.1, and SuSE 8.2~9.2 Mac 10.3, 10.4, 10.5

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

Wired network

Protocol

Wired network Supporting OS

Noise ****** Stand by : Less than 26 dBA

N/A TCP/IP, Ethertalk, SNMP, HTTP 1.1

N/A SCX-4623FN :

Printing : Less than 50 dBA Coping : Less than 52 dBA

(SCX-4623FN)

Windows 2000/XP(32/64bits)/2003 Server/Vista(32/64bits) NetWare 5.x, 6.x 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, SuSE 8.2~9.2 Unix AT&T system V(Rel 4.2), BSD4.3, HP-UX (Rel 9.x & Rel 10.x), SCO 5.x, SUNOS 5.5, Sparc or Solaris 2.5.

Stand by : Less than 26 dBA Printing : Less than 50 dBA Coping : Less than 52 dBA

Product specication and feature

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Items SCX-4600 series SCX-4623 Series

Power Requirement 110 ~ 127 VAC, 50/60 Hz, 4.5A

220 ~ 240 VAC, 50/60 Hz, 2.8A

Operating Conditions Temperature : 10 ℃ ~ 32 ℃

(50 ℉ ~ 89 ℉)

Humidity : 20 % ~ 80 % RH

Power Consumption Ready : Less than 45W

Average : Less than 370W Save : Less than 10W Power off : Less than 1W

110 ~ 127 VAC, 50/60 Hz, 4.5A 220 ~ 240 VAC, 50/60 Hz, 2.8A

Temperature : 10 ℃ ~ 32 ℃

(50 ℉ ~ 89 ℉)

Humidity : 20 % ~ 80 % RH

Ready : Less than 45W Average : Less than 370W Save : Less than 10W Power off : Less than 1W

AMPV 142 pages SCX-4623F : 194 pages

SCX-4623FN : 269 pages

Duty Cycle, monthly 12,000 pages 12,000 pages

MTBF 10,000 pages 10,000 pages

MTTR 30 min. 30 min.

SCANLife Cycle 20,000 sheets or 5 years

(whichever comes rst)

20,000 sheets or 5 years (whichever comes rst)

ADF Life Cycle N/A 20,000 sheets or 5 years

(whichever comes rst)

SET Life Cycle 50,000 sheets or 5 years

(whichever comes rst)

50,000 sheets or 5 years (whichever comes rst)

2.1.2.2 Print Specications

Items SCX-4600 series SCX-4623 Series

Method Laser Beam Printing Laser Beam Printing

Speed (Simplex)* Up to 22 ppm (letter) Up to 22 ppm (letter)

FPOT (letter) Less than 19sec (from sleep mode )

Less than 10sec (from stanby mode)

Warm-up Less than 60 seconds

(from power ON at room temp. 23℃/73℉) Less than 15 seconds (from sleep room temp. 23 ℃/73℉)

Resolution Up to 1200dpi Effective Output

(Addressable 1200x1200dpi)

Processor Jupiter5 375MHz Jupiter5 375MHz

Memory 64MB SCX-4623F : 64MB

Emulation SPL SPL , PCL-5 (4623FW Only)

Duplex Print Manual Manual

Less than 19sec (from sleep mode ) Less than 10sec (from stanby mode)

Less than 60 seconds (from power ON at room temp. 23℃/73℉) Less than 15 seconds (from sleep room temp. 23 ℃/73℉)

Up to 1200dpi Effective Output (Addressable 1200x1200dpi)

SCX-4623FN : 128 MB SCX-4623FW : 256 MB

Product specication and feature

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2.1.2.3 Copy Specications

Items SCX-4600 series SCX-4623 Series

Speed ** SDMC: up to 23 cpm in letter SDMC: up to 23 cpm in letter

Resolution (Optical) Text: 600 x 300 dpi (Platen)

Mixed: 600 x 300 dpi (Platen) Photo: 600 x 600 dpi (Platen)

FCOT(from Standby mode)

Zoom Rate 25~400% (platen) 25~400% (platen), 25~100% (ADF)

Multy Copy 1~99 pages 1~99 pages

Special Copy AutoFit Copy: Yes(Platen only)

Approx. 15 seconds: Platen Approx. 15 seconds: Platen

2-side Copy: Yes(Platen only) Clone: Yes(Platen only) Poster: Yes(Platen only)

Text: 600 x 300 dpi (Platen) Mixed: 600 x 300 dpi (Platen) Photo: 600 x 600 dpi (Platen)

Approx. 15 seconds: ADF

N-up copy: 2-up / 4-up Collation Copy: Yes AutoFit Copy: Yes(Platen only) 2-side Copy: Yes(Platen only) Clone: Yes(Platen only) Poster: Yes(Platen only)

Duplex Copy N/A N/A

Duplex Print Manual Manual

2.1.2.4 Scan Specications

Items SCX-4600 series SCX-4623 Series

Scanning Device Color 1200 dpi CIS (Contact Type

Image Sensor) Module

Supported OS Windows 98/Me/NT4.0/2000/XP,

Various Linux OS (via USB interface only) including Red Hat 8.0~9.0, Fedora Core 2~9, Mandrake 9.0~10.2, and SuSE 8.2~9.2, Mac 10.3~10.6

Compatibility TWAIN Standard, WIA Standard

(Win XP only)

Maximum Scan Width 216mm (8.5 inches) 216mm (8.5 inches)

Effective Scan Width 208mm (8.2 inches) 208mm (8.2 inches)

Optical Resolution Max 1200 x 1200 dpi Max 1200 x 1200 dpi

Color 1200 dpi CIS (Contact Type Image Sensor) Module

Windows 98/Me/NT4.0/2000/XP, Various Linux OS (via USB interface only) including Red Hat 8.0~9.0, Fedora Core 2~9, Mandrake 9.0~10.2, and SuSE 8.2~9.2, Mac 10.3~10.6

TWAIN Standard, WIA Standard (Win XP only)

Interpolated Resolution Maximum 4800 dpi x 4800 dpi Maximum 4800 dpi x 4800 dpi

Preview Scan 75 dpi 75 dpi

Product specication and feature

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Items SCX-4600 series SCX-4623 Series

Scan Modes/Speeds: (PC Environment : Win XP, P4-2.4GHz, 512M RAM, 300 dpi, Letter, USB1.1, Photoshop

6.0.1)

Line Art, Halftone : 15 sec on Platen, 15 sec on ADF Gray : 23 sec on Platen, 26 sec on ADF 256 Color 300 dpi : 65 sec on Platen, 70 sec on ADF True Color 300dpi : 65 sec on Platen, 70 sec on ADF

ADF Capacity: N/A 40 sheets (20 lb)

2.1.2.5 Fax Specications

Items SCX-4600 series SCX-4623 Series

Compatibility N/A ITU-T Group 3, ECM

Applicable line N/A Public Switched Telephone Network (PSTN)

Modem Speed N/A 33.6 Kbps

Transmission Speed *** N/A Approx. 3 seconds per page

Compression Mode N/A MH/ MR/ MMR/ JBIG/ JPEG

Scan Speed **** N/A Std : Approx. 2.5 seconds per page (LTR)

Fine/S.Fine : Approx. 5 seconds per page (LTR)

Fax mode N/A Standard : 203 x 98 dpi

Fine : 203 x 196 dpi Super Fine : 300 x 300 dpi

Memory N/A 4MB (About 600 Sheets of CCITT No.1 Chart

at standard resolution). User selectable parameters will be stored in NVRAM.

Functions N/A Voice Request : No

TTI : Yes RTI : Yes Polling :No Earth/Recall :No Auto Reduction : Yes F/W Remote upgrade :Yes

Product specication and feature

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2.1.2.6 Paper Handling

Items SCX-4600 series SCX-4623 Series

Standard Capacity 250-sheets Cassette Tray, 1-sheet

Multi Purpose Tray @ 80g/㎡

Maximum 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”)

1st Tray Capacity 250 sheets @ 80g/㎡ 250 sheets @ 80g/㎡

Media Sizes A4, A5, A6, Letter, Legal, Executive,

Folio, Ocio, ISO B5, JIS B5

250-sheets Cassette Tray, 1-sheet Multi Purpose Tray @ 80g/㎡

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

Media types Plain paper, Thick Paper, Thin Paper,

Recycled Paper, Archive Paper

Plain paper, Thick Paper, Thin Paper, Recycled Paper, Archive Paper

Media weight 16~32lb (60 to 120g/㎡) 16~32lb (60 to 120g/㎡)

Sensing Paper empty sensor Paper empty sensor

2nd Tray Capacity N/A N/A

Manual Tray

Capacity 1 sheet @ 80g/㎡ 1 sheet @ 80g/㎡

Media Sizes A4, A5, A6, Letter, Legal, Folio,

Ocio, Executive,ISO B5, JIS B5, 3"x5",Monarch, No.10, DL, C5, C6

Media types Plain paper, Thick Paper, Thin

Paper, Recycled Paper, Archive Paper,Transparency, Envelope, Labels, Post Card, Card stock, Custom

A4, A5, A6, Letter, Legal, Folio, Ocio, Executive,ISO B5, JIS B5, 3"x5",Monarch, No.10, DL, C5, C6

Plain paper, Thick Paper, Thin Paper, Recycled Paper, Archive Paper,Transparency, Envelope, Labels, Post Card, Card stock, Custom

Media weight 16~43lb (60 to 163g/㎡) 16~43lb (60 to 163g/㎡)

Sensing NA NA

Output Stacking 80 sheets @ 75g/㎡ 80 sheets @ 75g/㎡

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)

ADF Capacity N/A 40 sheets (Letter / A4, 20 lb / 75 g/㎡)

ADF Document Size N/A Width: 142 ~ 216mm (5.6”~8.5”)

Length : 148 ~ 356mm (5.8” ~ 14.0”)

Media Size

Letter, A4, Legal Letter, A4, Legal

(for Fax and Copy)

Product specication and feature

Service Manual

2-7

Samsung Electronics

2.1.2.7 Consumables (CRU)

Items SCX-4600 series SCX-4623 Series

Type Single Cartridge Single Cartridge

Yield Initial : Average Cartridge Yield 0.7K

standard pages Standard: Average Cartridge Yield 1.5K standard pages. High Yield: Average cartridge Yield 2.5K standard pages. Declared cartridge yield in accordance with ISO/IEC 19752.

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

Code

Initial : Average Cartridge Yield 1K standard pages Standard: Average Cartridge Yield 1.5K standard pages. High Yield: Average cartridge Yield 2.5K standard pages. Declared cartridge yield in accordance with ISO/IEC 19752.

2.1.2.8 Consumables (FRU)

Item Image Part code Life

Fuser

Transfer Roller

Pick up Roller

Cassette holder pad JC90-00941A 50K

JC91-00945A(220V) JC91-00946A(110V)

JC66-01218A 50K

JC93-00087A 50K

50K

Product specication and feature

Service Manual

2-8

Samsung Electronics

2.1.2.9 Options

Items SCX-4600 series SCX-4623 Series

Network N/A Yes [SCX-4623FN]

Memory N/A N/A

SCF N/A N/A

* Print speed will be affected by Operating system used, computing performance, application software, connecting

method, media type, media size and job complexity. ** Copy Speed is based on Single Document Multiple Copy *** Condition: Standard resolution, MMR(JBIG), Maximum modem speed, Phase “C” by ITU-T No.1 Chart,

Memory Tx, ECM **** Condition: ITU-T No.1 Chart, Standard Resolution ***** Please visit www.samsungprinter.com to download the latest software version. ****** Sound Pressure Level, ISO7779 ******* May be affected by operating environment, printing interval, media type and media size

N/A N/A

Product specication and feature

Service Manual

2-9

Samsung Electronics

2.1.3 Model Comparison Table

Samsung

SCX-4623FN

Image

Speed (A4) 22ppm 20ppm 22ppm

Copy Resolution 600 x 600 dpi 600 x 600 dpi 600 x 300 dpi

Scan

Resolution 1,200 x 600 dpi 600 x 600 dpi 2,400 x 600 dpi

Emulation SPL SPL GDI

FPOT 10 sec from ready 11 sec from ready 10 sec from ready

Mode Scan To PC Scan To PC Scan To PC

Resolution

(optical)

1,200 x 1,200 dpi 600 x 600 dpi 600 x 2,400 dpi

Samsung

SCX-4521F

Brother

MFC-7440N (Brother)

Resolution

(Enhanced)

Modem

Fax

Paper

General Interface USB 2.0, N/W USB 2.0 USB 2.0, N/W

Toner Yield Sales/Initial 1.5K/2.5K (1K) 3K (1K) 1.5K/2.6K (1K)

Speed

Memory 4 MB 2 MB 16 MB

Input

Capacity

ADF

Capacity

4,800 x 4,800 dpi 4800 x 4800 dpi 9,600 x 9,600 dpi

33.6 Kbps 33.6 Kbps 14.4 Kbps

250 Cassette 150 sheets 250 Cassette

40 sheets 30 sheets 35 sheets

Product specication and feature

Service Manual

2-10

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 feeder cover

2 Document feeder width guides

3 Document feeder input tray

4 Document feeder output tray

7 Handle 13 Toner cartridge

8 Tray 1 14 Manual tray paper width

9 Manual tray

guides

10 Front door 15 Scanner lid

5 Output support 11 Document output tray 16 Scanner glass

6 Front door handle 12 Control panel 17 Handset

a. SCX-4623F(K), SCX-4623FN, SCX-4623FH(K) b. SCX-4623FH(K) only.

Product specication and feature

Service Manual

2-11

Samsung Electronics

2.2.2 Rear View

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

1 Network port

5 Power receptacle

2 USB port 6 Rear door

3 Telephone line socket

4 Extension telephone socket (EXT)

a. SCX-4623FN b. SCX-4623F(K), SCX-4623FN, SCX-4623FH(K)

7 Rear door handle

Product specication and feature

Service Manual

2-12

Samsung Electronics

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 OPE

6 ADF

7 Platen

8 Feed roller

9 Separation Pad

10 Pick up roller

11 Transfer roller

12 OPC

13 Cassette

14 Pressure roller

15 Fuser Exit roller

Product specication and feature

Service Manual

2-13

Samsung Electronics

2.2.3.1 Feeding Part

It is consists of a basic cassette, an Manual 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 invoice to legal size paper. It has a paper existence sensing function (Capacity: 250 sheets (75g/㎡, 20lb 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 initializes paper transport out of the cassette. The Pickup Roller is driven by a solenoid.

4) Registration roller

It has a paper registration [skew correction] function, paper transferring function, paper detecting function, jam removing function, and so on.

5) Manual tray

It has a paper registration [skew correction] function, paper transferring function, jam removing function, and

so on.

It uses manual feed method to feed 1 sheet of paper and 1 envelope.

Product specication and feature

Service Manual

2-14

Samsung Electronics

2.2.3.2 Transfer Roller

- The transfer roller delivers the toner from 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 SCX-4600/4623 series, the driving device consisted of Φ55 BLDC motor, OPC, Pick- up, Feed,

gear block all mounted as an assembly.

• Driving Frequency: BLDCΦ55 Motor : 2200rpm(1650 Clock)

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

Product specication and feature

Service Manual

2-15

Samsung Electronics

2.2.3.4 Fuser

It is consists of a halogen lamp, heat roller, pressure roller, thermistor and thermostat. It fuses the toner on to the 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

Product specication and feature

Service Manual

2-16

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℃ for user, and attach a caution label at

where customer can see easily when customer open a rear cover.

Product specication and feature

Service Manual

2-17

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 the video data received to the controller to the electrostatic latent image on the OPC drum by controlling laser beam, exposing OPC drum, by use of a polygon mirror. The OPC drum is synchronized 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. The /HSYNC signal is used to synchronize the image data with the left margin of the paper. The one side of the polygon mirror is one line for scanning.

Product specication and feature

Service Manual

2-18

Samsung Electronics

Cleaning Roller

Cleaning Blade

-720V

-450V

-800V

0.20mW

Max -1.7KV

-100V

3 4

+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 contained in one assembly. The OPC unit houses the OPC drum and charging roller; the toner cartridge unit houses the 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)

• Toner Qty : 30gf / 40gf / 80gf (Initial : 1K/ Sales :1k / 2.5k)

• The life span of toner: 1k/2.5k sheets (ISO 19752 Pattern / letter standard )

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

• OPC Cleaning : Collect the toner by using cleaning blade.

• Handling of wasted toner : Waste [residual] toner is cleaned off the drum by means of a cleaning blade.

• OPC Drum Protecting Shutter : None

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

Product specication and feature

Service Manual

2-19

Samsung Electronics

LSUADF

PLATEN MOTOR

OPE

CIS

FUSER

SMPS

HYPER

OUT BIN FULL

CRUM

SPEAKER

LINE

EXT.

Pick up Clutch

BLDC &

REGI CLUTCH

FAX

CONEXANT

FAX

CONEXANT

DDR2

SDRAM

DDR2

SDRAM

Jupiter 5

Network IC

PLATEN

MOTOR IC

PLATEN

MOTOR IC

EEPROM

USB 2.0

SMPS

HYPER

OUT BIN FULL

CRUM

SPEAKER

Pick up Clutch

BLDC &

REGI CLUTCH

FAX

CONEXANT

FAX

CONEXANT

DDR2

SDRAM

DDR2

SDRAM

Jupiter 5

Network IC

PLATEN

MOTOR IC

PLATEN

MOTOR IC

EEPROM

USB 2.0

NETWORK

USB

2.2.4 Engine H/W Specications

2.2.4.1 Main PBA

The Engine and the Printer Controller function are housed into one Main Board called Main PBA. 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 The CPU on Main PBA manages the circuits for the motors: paper feed, paper path, clutches, pre- transfer lamp, current control to driver components, and fan driving. The signals from the paper feed jam sensor and paper empty sensor are directly inputted to the main board.

■ SCX-4623FN

+ 200 hidden pages