Samsung SCX-472x Service Manual

Mono Laser MFP

SCX-472x series

SCX-4729FD/HD/FW,

SCX-4728FD/HN, SCX-4701ND,

SCX-4705ND, SCX-4726FN

SERVICEMANUAL

Mono Laser MFP

Contents

1. Precautions

2. Product specification and description

3. Disassembly and Reassembly

4. Alignment and Troubleshooting

5. System Diagram

6. Reference Information

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

Contents

Contents

1. Precautions ......................................................................................................................................				1	−	1
1.1.	Safety warning ........................................................................................................................			1	−	1
1.2.	Caution for safety ....................................................................................................................			1	−	2
	1.2.1.	Toxic material.............................................................................................................		1	−	2
	1.2.2. Electric shock and fire safety precautions .........................................................................			1	−	2
	1.2.3.	Handling precautions ...................................................................................................		1	−	3
	1.2.4. Assembly and Disassembly precautions...........................................................................			1	−	3
	1.2.5. Disregarding this warning may cause bodily injury ............................................................			1	−	4
1.3.	ESD precautions......................................................................................................................			1	−	5
2. Product specification and description.....................................................................................................				2	−	1
2.1.	Product Specifications ..............................................................................................................			2	−	1
	2.1.1.	Product Overview........................................................................................................		2	−	1
	2.1.2.	Specifications .............................................................................................................		2	−	2
		2.1.2.1.	General Print Engine......................................................................................	2	−	2
		2.1.2.2.	Copier specification .......................................................................................	2	−	2
		2.1.2.3.	Scan specification..........................................................................................	2	−	3
		2.1.2.4.	Fax specification ...........................................................................................	2	−	4
		2.1.2.5.	Controller and Software..................................................................................	2	−	5
		2.1.2.6.	Paper Handling.............................................................................................	2	−	7
		2.1.2.7.	Consumables................................................................................................	2	−	8
		2.1.2.8.	Reliability and Service ...................................................................................	2	−	8
		2.1.2.9.	Environment ................................................................................................	2	−	8
		2.1.2.10.	Maintenance parts .........................................................................................	2	−	9
		2.1.2.11.	Options .......................................................................................................	2	−	9
	2.1.3.	Model Comparison Table ..............................................................................................		2	− 10
2.2.	System Overview.....................................................................................................................			2	− 11
	2.2.1.	Front View.................................................................................................................		2	− 11
	2.2.2.	Rear View	..................................................................................................................	2	− 12
	2.2.3.	Paper Path..................................................................................................................		2	− 13
	2.2.4.	System Layout............................................................................................................		2	− 14
		2.2.4.1.	Feeding Part.................................................................................................	2	− 15
		2.2.4.2.	Transfer Roller .............................................................................................	2	− 16
		2.2.4.3.	Drive Unit ...................................................................................................	2	− 16
		2.2.4.4.	Fuser ..........................................................................................................	2	− 17
		2.2.4.5.	LSU (Laser Scanner Unit)...............................................................................	2	− 18
		2.2.4.6.	Toner Cartridge.............................................................................................	2	− 19
	2.2.5.	Hardware configuration ................................................................................................		2	− 20
		2.2.5.1.	Main board ..................................................................................................	2	− 21

i	Copyright© 1995-2012 SAMSUNG. All rights reserved.

Contents

	2.2.5.2.	OPE board ...................................................................................................	2	− 23
	2.2.5.3. Wireless LAN board (SCX—4729FW only).......................................................		2	− 24
	2.2.5.4.	Fax board ....................................................................................................	2	− 24
	2.2.5.5.	Joint PBA ....................................................................................................	2	− 25
	2.2.5.6.	SMPS Board ................................................................................................	2	− 26
	2.2.5.7.	HVPS Board ................................................................................................	2	− 28
	2.2.5.8.	Electrical Parts Location.................................................................................	2	− 29
2.2.6.	Engine F/W Control Algorithm ......................................................................................		2	− 31
	2.2.6.1.	Feeding .......................................................................................................	2	− 31
	2.2.6.2.	Transfer.......................................................................................................	2	− 31
	2.2.6.3.	Fusing.........................................................................................................	2	− 32
	2.2.6.4.	LSU............................................................................................................	2	− 32
2.2.7.	Software Descriptions ..................................................................................................		2	− 33
	2.2.7.1.	Software system overview ..............................................................................	2	− 33
	2.2.7.2.	Architecture .................................................................................................	2	− 33
	2.2.7.3. Data and Control Flow ...................................................................................		2	− 34
3. Disassembly and Reassembly ..............................................................................................................			3	−	1
3.1. Precautions when replacing parts ................................................................................................			3	−	1
3.1.1.	Precautions when assembling and disassembling ...............................................................		3	−	1
3.1.2.	Preautions when handling PBA ......................................................................................		3	−	1
3.1.3.	Releasing Plastic Latches..............................................................................................		3	−	2
3.2. Screws used in the printer..........................................................................................................			3	−	3
3.3. Replacing the Main SVC parts ...................................................................................................			3	−	4
3.3.1.	Cover........................................................................................................................		3	−	4
3.3.2.	OPE..........................................................................................................................		3	−	5
3.3.3.	Scanner .....................................................................................................................		3	−	6
3.3.4.	ADF .........................................................................................................................		3	−	7
3.3.5.	ADF Roller ................................................................................................................		3	−	7
3.3.6.	ADF Motor ................................................................................................................		3	−	8
3.3.7.	Scan Motor ................................................................................................................		3	−	9
3.3.8.	CIS Unit ....................................................................................................................		3	− 10
3.3.9.	Middle Cover .............................................................................................................		3	− 11
3.3.10.	Fax Board	..................................................................................................................	3	− 12
3.3.11.	Main board.................................................................................................................		3	− 12
3.3.12.	SMPS board ...............................................................................................................		3	− 13
3.3.13.	HVPS board ...............................................................................................................		3	− 13
3.3.14.	Bin-Full sensor ...........................................................................................................		3	− 14
3.3.15.	Main Drive Unit..........................................................................................................		3	− 14
3.3.16.	Pick up and Regi Clutch ...............................................................................................		3	− 15
3.3.17.	Pick up and Forward roller ............................................................................................		3	− 16

Copyright© 1995-2012 SAMSUNG. All rights reserved.

ii

Contents

		3.3.18.	Retard roller ...............................................................................................................		3	− 17
		3.3.19.	Duplex unit ................................................................................................................		3	− 18
		3.3.20.	Transfer roller .............................................................................................................		3	− 19
		3.3.21.	LSU ..........................................................................................................................		3	− 19
		3.3.22.	Fuser unit ...................................................................................................................		3	− 20
		3.3.23.	Exit Sensor .................................................................................................................		3	− 20
		3.3.24.	Feed and Regi sensor ...................................................................................................		3	− 21
		3.3.25.	Motor ........................................................................................................................		3	− 22
4.	Alignment and Troubleshooting ...........................................................................................................				4	−	1
	4.1.	Alignment and Adjustments.......................................................................................................			4	−	1
		4.1.1.	Control Panel ..............................................................................................................		4	−	1
		4.1.2.	Understanding the status LED ........................................................................................		4	−	3
		4.1.3.	JAM Removal .............................................................................................................		4	−	4
			4.1.3.1. Clearing original document jams ......................................................................		4	−	4
			4.1.3.2.	Clearing paper jams.......................................................................................	4	−	7
		4.1.4.	Useful menu item for service .........................................................................................		4	− 11
		4.1.5.	Periodic defective image ...............................................................................................		4	− 13
		4.1.6.	Useful management tools ..............................................................................................		4	− 14
			4.1.6.1. Using Samsung Easy Printer Manager (Windows/Mac only) ..................................		4	− 14
			4.1.6.2. Using Samsung Printer Status (Windows only) ...................................................		4	− 16
			4.1.6.3. Using Smart Panel (Linux only) .......................................................................		4	− 17
		4.1.7.	Updating Firmware ......................................................................................................		4	− 18
			4.1.7.1. Update the firmware by using the USB port ........................................................		4	− 18
			4.1.7.2. Update the firmware by using the network ..........................................................		4	− 19
		4.1.8.	Tech Mode .................................................................................................................		4	− 21
	4.2.	Troubleshooting ......................................................................................................................			4	− 26
		4.2.1.	Procedure of checking the symptoms ...............................................................................		4	− 26
			4.2.1.1.	Basic Check List ...........................................................................................	4	− 27
		4.2.2.	Error Code and Troubleshooting .....................................................................................		4	− 28
		4.2.3.	Image quality problem ..................................................................................................		4	− 42
		4.2.4.	Other errors ................................................................................................................		4	− 48
5.	System Diagram................................................................................................................................				5	−	1
	5.1.	Block Diagram........................................................................................................................			5	−	1
	5.2.	Connection Diagram.................................................................................................................			5	−	2
6.	Reference Information........................................................................................................................				6	−	1
	6.1.	Tool for Troubleshooting...........................................................................................................			6	−	1
	6.2.	Glossary	.................................................................................................................................		6	−	2
	6.3. The Sample ..................................................................................................Pattern for the Test				6	−	8
	6.4.	Selecting ..................................................................................................................a location			6	−	9

iii	Copyright© 1995-2012 SAMSUNG. All rights reserved.

1. Precautions

1. Precautions

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

1.1. Safety warning

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

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

2)Use only Samsung replacement parts.

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

3)Laser Safety Statement

The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for Class I(1) laser products, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC 60825-1. Class I laser products are not considered to be hazardous. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance or prescribed service condition.

•Wavelength: 800 nm (788, –13/+12)

•Beam divergence

-Paraller: 12 degrees (9, –2/+3)

-Perpendicular: 35 degrees (31, –6/+4)

•Maximum power of energy output: 15 mW

WARNING

Never operate or service the product with the protective cover removed from Laser/Scanner assembly. The reflected beam, although invisible, can damage your eyes.

When using this product, these basic safety precautions should always be followed to reduce risk of fire, electric shock, and personal injury.

Copyright© 1995-2012 SAMSUNG. All rights reserved.

1-1

1. Precautions

1.2. Caution for safety

1.2.1. Toxic material

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

1)Please keep imaging unit and toner cartridge away from children. The toner powder contained in the imaging unit and toner cartridge may be harmful, and if swallowed, you should contact a doctor.

1.2.2. Electric shock and fire safety precautions

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

1)Use only the correct voltage, failure to do so could damage the product and potentially cause a fire or electric shock.

2)Use only the power cable supplied with the product. Use of an incorrectly specified cable could cause the cable to overheat and potentially cause a fire.

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

4)Do not allow water or other liquids to spill into the product, this can cause electric shock. Do not allow paper clips, pins or other foreign objects to fall into the product, these could cause a short circuit leading to an electric shock or fire hazard.

5)Never touch the plugs on either end of the power cable with wet hands, this can cause electric shock. When servicing the product, remove the power plug from the wall socket.

6)Use caution when inserting or removing the power cord. When removing the power cord, grip it firmly and pull. The power cord must be inserted completely, otherwise a poor contact could cause overheating leading to a fire.

7)Take care of the power cable. Do not allow it to become twisted, bent sharply around corners or wise damaged. Do not place objects on top of the power cable. If the power cable is damaged it could overheat and cause a fire. Exposed cables could cause an electric shock. Replace the damaged power cable immediately, do not reuse or repair the damaged cable. Some chemicals can attack the coating on the power cable, weakening the cover or exposing cables causing fire and shock risks.

8)Ensure that the power sockets and plugs are not cracked or broken in any way. Any such defects should be repaired immediately. Take care not to cut or damage the power cable or plugs when moving the machine.

9)Use caution during thunder or lightning storms. Samsung recommends that this machine be disconnected from the power source when such weather conditions are expected. Do not touch the machine or the power cord if it is still connected to the wall socket in these weather conditions.

10)Avoid damp or dusty areas, install the product in a clean well ventilated location. Do not position the machine near a humidifier or in front of an air conditioner. Moisture and dust built up inside the machine can lead to overheating and cause a fire or cause parts to rust.

11)Do not position the product in direct sunlight. This will cause the temperature inside the product to rise possibly leading to the product failing to work properly and in extreme conditions could lead to a fire.

12)Do not insert any metal objects into the machine through the ventilator fan or other part of the casing, it could make contact with a high voltage conductor inside the machine and cause an electric shock.

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

1-2	Copyright© 1995-2012 SAMSUNG. All rights reserved.

1. Precautions

1.2.3. Handling precautions

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

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

2)The product contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers, hair or clothing in any of these rotating devices.

3)Do not place any small metal objects, containers of water, chemicals or other liquids close to the product which if spilled could get into the machine and cause damage or a shock or fire hazard.

4)Do not install the machine in areas with high dust or moisture levels, beside on open window or close to a humidifier or heater. Damage could be caused to the product in such areas.

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

1.2.4. Assembly and Disassembly precautions

1)Replace parts carefully and always use Samsung parts. Take care to note the exact location of parts and also cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly. Please carry out the following procedures before dismantling the product or replacing any parts.

2)Ensure that power is disconnected before servicing or replacing any electrical parts.

3)Disconnect interface cables and power cables.

4)Only use approved spare parts. Ensure that part number, product name, any voltage, current or temperature rating are correct.

5)When removing or re-fitting any parts do not use excessive force, especially when fitting screws into plastic.

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

7)Handling of the OPC Drum

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

•Take care not to scratch the green surface of OPC Drum Unit. If the green surface of the Drum Cartridge is scratched or touched the print quality will be compromised.

Copyright© 1995-2012 SAMSUNG. All rights reserved.

1-3

1. Precautions

1.2.5. Disregarding this warning may cause bodily injury

1)Be careful with the high temperature part.

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

2)Do not put finger or hair into the rotating parts.

When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor, fan, etc.). If do, you can get harm.

3)When you move the printer, use safe lifting and handling techniques.

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

4)Ensure the printer is installed safely.

Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer.

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

1-4	Copyright© 1995-2012 SAMSUNG. All rights reserved.

1. Precautions

1.3. ESD precautions

Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called “Electrostatically Sensitive (ES) Devices” or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components. The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.

CAUTION

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

1)Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially available wrist strap device, which should be removed for your personal safety reasons prior to applying power to the unit under test.

2)After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assembly.

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

4)Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.

5)Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to damage ESDs.

6)Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.

7)Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

8)Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.

9)Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to damage an ESD.

Copyright© 1995-2012 SAMSUNG. All rights reserved.

1-5

2. Product specification and description

2. Product specification and description

2.1. Product Specifications

2.1.1. Product Overview

1) Speed

• Up to 28 ppm in A4 (29 ppm in Letter)

2) Printing Resolution

• Up to 1,200 x 600 dpi effective output

3) Processor

• 533 MHz

4) Printer Language Emulation

• PCL6/5e, SPL

5) Memory

• 128MB

6) Interface

• High speed USB 2.0

• 10/100 BaseTX network connector

• 802.11b/g/n wireless LAN (SCX-4729FW)

7) Toner cartridge

• Initial : 1K

• Sales : 1.5K / 2.5K two types

2-1	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.1.2. Specifications

•Product Specifications are subject to change without notice.

2.1.2.1. General Print Engine

	Item					Specification
						•	SCX-4728/4729 seires
			Simplex				• Up to 28 ppm in A4 (29 ppm in Letter)
						•	SCX-4726 series
Engine Speed							• Up to 26 ppm in A4 (27 ppm in Letter)
						•	SCX-4728/4729 seires
			Duplex				• Up to 13 ppm in A4 (13 ppm in Letter)
						• SCX-4726 series : Not support
Warmup time			From Sleep			Less than 15 seconds
FPOT			From Ready			Less than 8.5 seconds
			From Sleep			Less than 15 seconds
	Resolution					Up to 1,200 x 600 dpi effective output
2.1.2.2. Copier specification
Item				Specification
Copy Speed	Simplex to Simplex			up to 20 cpm in A4
FCOT (B&W)	From Ready			Less than 15 seconds (from platen)
				• Scan : 600 x 600 dpi (Optical 600 x 300 dpi) @ ADF, Printing :
	Text				600 x 600 dpi
				• Scan : 600 x 600 dpi (Optical 600 x 600 dpi) @ Platen, Printing :
					600 x 600 dpi
				• Scan : 600 x 600 dpi (Optical 600 x 300 dpi) @ ADF, Printing :
Copy Resolution	Text/Photo				600 x 600 dpi
				• Scan : 600 x 600 dpi (Optical 600 x 600 dpi) @ Platen, Printing :
					600 x 600 dpi
				• Scan : 600 x 600 dpi (Optical 300 x 300 dpi) @ ADF, Printing :
	Photo				600 x 600 dpi
				• Scan : 1,200 x 1,200 dpi (Optical 600 x 600 dpi) @ Platen, Printing
					: 1,200 x 1,200 dpi
Original Type	Factory Default			Text/Photo
Max. Original	Platen			A4
Size	ADF			Legal (8.5" x 14")

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-2

2. Product specification and description

Item		Specification
	Multi Copy	1~99
	Automatic Paper Selection	No
	Manual Paper Selection	Yes
Basic Copy	Duplex Copy	Yes
	Darkness Control	11 Levels
	Reduce & Enlarge	• 25% to 400% for Platen
		• 25% to 100% for ADF

2.1.2.3. Scan specification

	Item		Specification
	Scan method		Color CIS
	Compatibility		TWAIN, WIA
	Color Mode		Mono / Gray / Color
		Lineart, Halftone (mono)	20 ipm @ 300 dpi
	Scan Speed	Gray (mono)	20 ipm @ 300 dpi
		Color	6 ipm @ 300 dpi
	Resolution	Optical	1200 x 1200 dpi
		Enhanced	4,800 dpi x 4,800 dpi
	Halftone		256 levels
		Max. Document Width	Max. 216 mm (8.5")
		Effective Scan Width	Max. 208 mm (8.2")
	Scan Size	Max. Document Length	•	ADF : 356 mm (14")
			•	Platen : 297 mm (11.7")
		Effective Scan Length	•	ADF : 348 mm (13.7")
			•	Platen : 289 mm (11.4")
		Color	24 bits
	Scan Depth
		Mono	• 1 bit for Lineart & Halftone
			• 8 Bits for Gray scale
		Capacity	40 sheets @ 80 gsm
	ADF
		Document Size	• Width : 142 ~ 216 mm
			• Length : 148 ~ 356 mm

2-3	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.1.2.4. Fax specification

	Item		Specification
	Compatibility		ITU-T G3, ECM
	Communication System		PSTN/PABX
	Modem Speed		33.6 Kbps
	TX Speed		Approx. 3 sec (Mono/Standard/ECM-MMR, @ ITU-T G3 No.1 )
	Compression		MH/MR/MMR/JBIG/JPEG
	Color Fax		Yes (Tx only)
	ECM		Yes
	Resolution	Std	203 x 98 dpi
		Fine	203 x 196 dpi
	(Mono)
		S.Fine	300 x 300 dpi
		Handset	Yes (China Only)
		On hook Dial	Yes
		Search	Yes (Phone Book)
		Speed Dial	200 locations
		Group Dial	Group Dial
	Telephone	TAD I/F	Yes
	Features	Tone/Pulse	Yes (Selectable in Tech Mode)
		Pause	Yes
		Auto Redial	Yes
		Last Number Redial	Yes
		Caller ID	No
		External Phone Interface	Yes

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-4

2. Product specification and description

2.1.2.5. Controller and Software

	Item		Specification
Processor			533 MHz
Memory		Std.	128 MB
		Max.	128 MB
Printer Languages			PCL6/5e, SPL
Fonts			Windows Fonts
		Default Driver	•	Windows/Mac/Linux : SPL
			•	Unix : PLC6
			•	Windows : SPL, PCL6
		Install	•	Mac/Linux : SPL
			•	Unix : PCL6
			Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003
			Server(32/64bits)/ 2008 Server(32/64bits)/ 7(32/64bits)/ 2008
			Server R2(64bits)
			Linux
			• RedHat Enterprise Linux WS 4, 5 (32/64 bit)
			• Fedora 5, 6, 7, 8, 9, 10, 11, 12, 13 (32/64 bit)
			• SuSE Linux 10.1 (32 bit)
			• OpenSuSE 10.2, 10.3, 11.0, 11.1, 11.2 (32/64 bit)
Print Driver		Supporting OS	• Mandriva 2007, 2008, 2009, 2009.1, 2010 (32/64 bit)
			• Ubuntu 6.06, 6.10, 7.04, 7.10, 8.04, 8.10, 9.04, 9.10,
				10.04 (32/64 bit)
			• SuSE Linux Enterprise Desktop 10, 11 (32/64 bit)
			• Debian 4.0, 5.0 (32/64 bit)
			Mac OS X 10.4 ~ 10.6
			UNIX
			• Sun Solaris 9,10 (x86, SPARC)
			• HP-UX 11.0, 11i v1, 11i v2, 11i v3 (PA-RISC, Itanium)
			• IBM AIX 5.1, 5.2, 5.3, 5.4
			Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003
		WHQL	Server(32/64bits)/ 2008 Server(32/64bits)/ 7(32/64bits)/ 2008
			Server R2(64bits)
			Win 2000/ XP(32/64bits)/ 2003 Server(32/64bits)/
		Compatibility	Vista(32/64bits)/ 2008 Server(32/64bits)/ 7(32/64bits)/ 2008
			Server R2(64bits)
		TWAIN	Yes
		WIA	Yes
Scan Driver		ICDM	Yes
			Windows 2000/ XP(32/64bits)/ Vista(32/64bits)/ 2003
		Supporting OS	Server(32/64bits)/ 2008 Server(32/64bits)/ 7(32/64bits)/ 2008
			Server R2(64bits)

2-5	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

	Item		Specification
			Linux
			• RedHat Enterprise Linux WS 4, 5 (32/64 bit)
			• Fedora 5, 6, 7, 8, 9, 10, 11, 12, 13 (32/64 bit)
			• SuSE Linux 10.1 (32 bit)
			• OpenSuSE 10.2, 10.3, 11.0, 11.1, 11.2 (32/64 bit)
			• Mandriva 2007, 2008, 2009, 2009.1, 2010 (32/64 bit)
			• Ubuntu 6.06, 6.10, 7.04, 7.10, 8.04, 8.10, 9.04, 9.10,
				10.04 (32/64 bit)
			• SuSE Linux Enterprise Desktop 10, 11 (32/64 bit)
			• Debian 4.0, 5.0 (32/64 bit)
			Mac OS X 10.4 ~ 10.6
			•	[TCP/IP]
		Protocol		TCP/IPv4/IPv6, HTTP, SNMPv1/v2c/v3, IPSec,
				DNS/WINS, DDNS, DHCP, BOOTP, AutoIP, Standard
				TCP/IP printing, LPR, IPP, UPnP(SSDP), Bonjour,
				Telnet, WSD, SLP,SetIP
			[Windows]
			• Microsoft Windows 2000/ XP(32/64bits)/
				2003(32/64bits)/ Vista(32/64bits)/ 2008(32/64bit)/
				7(32/64bit)
			[Mac]
Wired Network			•	Mac OS 10.4~10.6
			[Linux]
		Supporting OS	• RedHat Enterprise Linux WS 4, 5 (32/64 bit)
			• Fedora 5, 6, 7, 8, 9, 10, 11, 12, 13 (32/64 bit)
			• SuSE Linux 10.1 (32 bit)
			• OpenSuSE 10.2, 10.3, 11.0, 11.1, 11.2 (32/64 bit)
			• Mandriva 2007, 2008, 2009, 2009.1, 2010 (32/64 bit)
			• Ubuntu 6.06, 6.10, 7.04, 7.10, 8.04, 8.10, 9.04, 9.10,
				10.04 (32/64 bit)
			• SuSE Linux Enterprise Desktop 10, 11 (32/64 bit)
			• Debian 4.0, 5.0 (32/64 bit)
Wireless Network		Protocol	802.11 b/g/n
(SCX–4729FW only)		Supporting OS	Same as wired network
		Samsung Easy Printer	For Windows and Macintosh
		Manager
Application			For Linux
		Smart Panel
			SyncThru Web Service 2.0
		Network Management
Interface		Parallel	N/A
		USB	High speed USB 2.0

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-6

2. Product specification and description

2.1.2.6. Paper Handling

Item			Specification
Standard Capacity			250-sheet Cassette @ 80 g/m², 1-sheet Multi Purpose Tray
Max. Capacity			251-sheet
Printing		Max. Size	216 x 356 mm (8.5" x 14")
		Min. Size	76 x 127 mm (3.0" x 5.0")
		Capacity	250-sheet Cassette @ 80g/m²
Standard		Media sizes	A4, A5, ISO B5, JIS B5, Executive, Letter, Oficio, Folio, Legal
		Media types	Plain, Thin, Recycled, Thick, Archive
Cassette Tray
		Media weight	16~43 lb (60 to 163 g/m²)
		Sensing	Yes
		Capacity	• Plain Paper : 1 sheet
			•	Envelop : 1 sheet
		Media sizes	A4, A5, A6, EXEC, ISO B5, JIS B5, Letter, Oficio, Folio, Legal, Envelope (No 10,
			Monarch, DL, C5, C6) Postcard4x6, Custom
Multi-purpose
			Plain, Thick,Thin, Cotton, Colored, Pre-printed, Recycled, Envelope, Transparency,
tray		Media type
			Label, Cardstock, Bond, Archive
		Media weight	16~58 lb (60 to 220 g/m²)
		Sensing	Yes
Optional Cassette Tray			N/A
Output Stacking		Capacity	• Face-Down : 120 sheets @ 80 g/m²
			•	Face-Up : 1 sheet
Output Full sensing			Yes
		Supporting	•	SCX-4728/4729 series : Yes
			•	SCX-4726FN : Not support
Duplex		Media sizes	A4, Letter, Oficio, Folio, Legal
		Media types	Plain, thin, thick, bond, recycled
		Media weight	16~32 lb (60 to 120 g/m²)
Printable Area		Non-Printable	• Envelop : 10 mm (0.4") from edge (Top, Bottom, Left, Right)
		Area	• Other Media : 4 mm (0.16") from edge (Top, Bottom, Left, Right)

2-7	Copyright© 1995-2012 SAMSUNG. All rights reserved.

			2. Product specification and description
2.1.2.7. Consumables
Type	Average yield	Part name
Standard yield toner cartridge	Approx. 1,500 pages	•	MLT-D103S
High yield toner cartridge	Approx. 2,500 pages	•	MLT-D103L

NOTE

•Declared yield value in accordance with ISO/IEC 19752.

•Depending on the options and job mode used, the toner cartridge’s lifespan may differ.

2.1.2.8. Reliability and Service

Item	Specification
Printing Volume (SET AMPV)	175 pages
Max. Monthly Duty	12,000 pages
MPBF	30,000 pages
MTTR	30 min.
SET Life Cycle	100,000 pages or 5 years (whichever comes first)

2.1.2.9. Environment

	Item		Specification
	Operating Environment	Temperature	10C to 32C
		Humidity	20% to 80%
	Acoustic Noise Level (Sound	Printing	Less than 50 dB
		Standby	Less than 30 dB
	Power/Pressure)
		Sleep	Back Ground Level
		Ready	Less than 60 W
	Power Consumption	AVG.	Less than 360 W
		Max/Peak	Less than 400 W
		Sleep / Power Off	Less than 6.5 W / Less than 0.8 W (Conformity to EPA)
	Dimension (W x D x H)	SET	406 x 338 x 383 mm (16 x 13.3 x 15.1 inches)
	Weight	SET (With Toner cartridge)	10.9 kg (24 lbs)

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-8

2. Product specification and description

2.1.2.10. Maintenance parts

Item	Image		Part Code			Life
			•	220V
Fuser				•	JC91–01034A	100,000 pages
			•	110V
				•	JC91–01034B
Transfer Roller			JC66-01218A			100,000 pages
Pick-Up/ Forward			JC93–00405A			50,000 pages
Roller Assy
Retard Roller			JC90–01107A			50,000 pages
2.1.2.11. Options
Item		Specification
Memory		N/A
Second Cassette		N/A
Hard Disk		N/A

2-9	Copyright© 1995-2012 SAMSUNG. All rights reserved.

				2. Product specification and description
2.1.3. Model Comparison Table
		Samsung	Samsung		HP
		SCX-4729FW	SCX-4824FN		M1536DNF
Image
Speed (A4)		28 ppm	24 ppm		25 ppm
FPOT		less than 8.5 sec	less than 9 sec		less than 7 sec
(from ready)
Processor		533 MHz	360 MHz		400 MHz
Memory		128 MB	128 MB		32 MB
Emulation		GDI, PCL6	GDI, PCL6		GDI, PCL6, PS3
Paper	Input	250 CST, 1 MP	250 CST, 1 MP		250 Bin, 10 MP
	Output	120 sheet	100 sheet		100 sheet
Capacity
	ADF	40 sheet	30 sheet		35 sheet
Duplex (Auto)		Yes	Yes		Yes
Noise		50 dBA	49 dBA		51 dBA
Toner Cartridge		1.5/2.5K (1K)	2/5K (2K)		2.1K (1K)

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-10

2. Product specification and description

2.2. System Overview

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

2.2.1. Front View

NOTE

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

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

1	Document feeder cover
2	Document feeder guide cover
3	Document feeder output tray
4	Control Panel
5	Paper level indicator
6	Tray
7	Manual feeder tray
8	Front cover
9	Output tray

10Output support

11Paper width guide on a manual feeder tray

12Scanner lid

13Scanner glass

14Document feeder input tray

15Paper width guide on a Document feeder

16Document feeder output support

17Handset (SCX-4729HD, 4728HN only)

2-11	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.2.2. Rear View

NOTE

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

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

1	Network port		6	Power receptacle
2	Telephone line socket (Line)		7	Rear cover
3	Extension telephone socket (EXT)
4	USB port
5	Power-switch

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-12

2. Product specification and description

2.2.3. Paper Path

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

[ADF]

[Engine]

2-13	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.2.4. System Layout

This model consists of the Scanner parts, Engine parts, Hardware and Firmware. The scanner parts consists of ADF and platen. The engine parts consists of the mechanical parts comprising Frame, Duplex, Toner cartridge, Drive unit, Transfer roller, Fuser, Cassette. The Hardware part consists of the main control board, power board, operation panel, PC Interface.

1	ADF		7	Regi. Roller
2	Scanner (Platen)		8	Cassette
3	LSU		9	Duplex
4	Toner cartridge		10	Fuser
5	MP		11	Exit Roller
6	Pick-Up Roller

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-14

2. Product specification and description

2.2.4.1. Feeding Part

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

1) Cassette

The cassette stores the paper (Capacity: 250 sheets (80g/m² paper standard). Both the side guide and the rear guide can be adjusted for various types of papers from A6 to legal size paper. It has a paper detecting function, and adjustable paper guides to make it a truly universal cassette.

2) Pick-Up / Forward / Retard roller

When pickup takes place, the pickup roller moves down to come into contact with the surface of the paper. The pickup roller moves down when the pickup clutch is activated. The forward roller and the retard roller serve to make sure that a single sheet of paper is moved into the paper path, and the paper is moved as far as the registration roller by the means of the feed roller.

3) Registration roller

It is used as an anti skew device, and to setup proper registration timing with that of the toned image on the drum. It also is used for jam detection to ensure paper has left the paper tray.

4) MP (Multi-Purpose) Tray

The multi-purpose tray can hold special sizes and types of print material, such as postcards, note cards, and envelopes.

2-15	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.2.4.2. Transfer Roller

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

•Life Span : Print over 100,000 sheets (in 15~30 )

2.2.4.3. Drive Unit

In this model, the driving device consists of BLDC motor, Regi./Pick up clutches, various gears for OPC, Fuser, Pickup, Feed, Regi, Exit.

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-16

2. Product specification and description

2.2.4.4. Fuser

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

1)Thermostat

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

•Thermostat Type : NonContact type Thermostat

•Control Temperature : 170 ± 5

2)Thermistor

It is a temperature detecting sensor.

•Temperature Resistance : 7KΩ (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 Teflon, so toner does not stick to the surface.

4)Pressure roller

A pressure roller mounted under a heat roller is made of a silicon resin, and the surface also is coated with Teflon. When a paper passes between a heat roller and a pressure roller, toner adheres to the surface of a paper and is permanently fused.

5)Halogen Lamp

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

•Capacity : 850 Watt ± 25 W

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.

2-17	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.2.4.5. 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.

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-18

2. Product specification and description

2.2.4.6. Toner Cartridge

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

•Developing Method : Non magnetic 1 element contacting method

•Toner : Non magnetic 1 element shatter type toner

•The life span of toner (ISO 19752 pattern / A4 standard)

-Initial toner : 1K

-Sales toner : 1.5K / 2.5K

•OPC Cleaning : Collect the toner by using cleaning blade

•Handling of wasted toner : Collect the wasted toner in the cleaning frame by using cleaning blade

•Classifying device for toner cartridge: ID is classified by CRUM.

1	OPC Drum	5	Supply Roller
2	Charging Roller	6	Waste Toner Tank
3	Agitator	7	Cleaning Blade
4	Developing Roller

2-19	Copyright© 1995-2012 SAMSUNG. All rights reserved.

2. Product specification and description

2.2.5. Hardware configuration

The SCX-4729 series Electrical Circuit System consists of the following:

•Main board (System board)

•OPE board

•SMPS board

•HVPS board

•Fax board

Diagram of the SCX-4729 series Electrical Circuit

SCX-4729 series has a system board of integrated engine controller and video controller.

The engine controller controls all modules required to print, that is, LSU, HVPS, SMPS, FAN, Fuser, etc.

It communicates with the video control block inside CPU for printing. And it has the interface for all video sync signal to print out the video data.

The video controller receives print data from the host through network or USB Port. It takes this information and generates printable video bitmap data.

The main board adopts the 533 MHz CPU, on board DDR2 memory (128MB) to perform printing jobs successfully.

Copyright© 1995-2012 SAMSUNG. All rights reserved.

2-20

2. Product specification and description

2.2.5.1. Main board

Chorus3–Next(C3N) chip is adopted as the main processor. Its process speed is 533 MHz. It is integrated engine controller, video controller, scan controller.

DDR2 128MB is adopted for high speed data processing. Boot has 16 MB SPI + 4 MB SPI.

USB is the embedded type and wired network supports 100M full duplex.

[Main board diagram]

2-21	Copyright© 1995-2012 SAMSUNG. All rights reserved.