Disassembly & Reassembly.pdf

5 5. Disassembly and Reassembly

Disassembly and Reassembly

5.1 Precautions When Replacing Parts

page(5-2)

5.1.1 Precautions when assembling and disassembling

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5.1.2 Precautions when handling PBA

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5.2 Parts for Maintenance and Repair

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5.2.1 Replacement interval for parts with a limited life

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5.2.2 Printer Cleaning

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5.3 Information Related in Disassembly and Assembly

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5.3.1 Special Service Parts

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1) Disassemble of LSU Unit

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2) Disassemble of ITB Unit

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3) Custody of OPC Unit

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4) Custody of Toner Cartridge

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5) Disassemble of DEVE Drive Ass’y and Main Drive Ass’y

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6) Disassemble of Terminal Parts

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7) Disassemble of Fuser Unit

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5.3.2 Screws Used in the Printer

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5.3.3 Opening Covers and replacing Consumable parts

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>> Consumable parts removal

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5.4 Disassembly Procedure

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5.4.1 Cover Unit

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5.4.2 Fuser Ass’y

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5.4.3 LSU(Laser Scan Unit)

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5.4.4 HVPS(High Voltage Power Supply

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5.4.5 Main Board

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5.4.6 SMPS(Switching Mode Power Supply)

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5.4.7 Drive Ass’y

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5.4.8 Transfer Roller

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Service Manual

5-1

Samsung Electronics

Disassembly and Reassembly

5.1 Precautions when replacing parts

5.1.1 Precautions when assembling and disassembling

* Use only approved Samsung spare parts. Ensure that part number, product name, any voltage, current or

temperature rating are correct. Failure to do so could result in damage to the machine, circuit overload,

fire or electric shock.

* Do not make any unauthorized changes or additions to the printer, these could cause the printer to mal-

function and create electric shock or fire hazards.

* Take care when dismantling the unit to note where each screw goes. There are 19 different screws. Use of

the wrong screw could lead to system failure, short circuit or electric shock.

* Do not disassemble the LSU unit. Once it is disassembled dust is admitted to the mirror chamber and will

seriously degrade print quality. There are no serviceable parts inside.

* Regularly check the condition of the power cord, plug and socket. Bad contacts could lead to overheating

and firfe. Damaged cables could lead to electric shock or unit malfunction.

5.1.2 Preautions when handling PBA

Static electricity can damage a PBA, always used approved anti-static precautions when

handling or storing a PBA.

>> Precautions when moving and storing PBA

1. Please keep PBA in a conductive case, anti-static bag, or wrapped in aluminum foil.

2. Do not store a PBA where it is exposed to direct sunlight.

>> Precautions when replacing PBA

1. Disconnect power connectors first, before disconnecting other cables

2. Do not touch any soldered connections, connector terminals or other electronic parts when handling

insulated parts.

>> Precautions when checking PBA

1. Before touching a PBA, please touch other grounded areas of the chassis to discharge any static elec-

trical 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 cir-

cuit or get an electric shock. Take extra care when handling PBAs with moving parts fitted such as sen-

sors, motors or lamps as they may get hot.

3. Take care when fitting, or removing, screws. Look out for hidden screws. Always ensure that the correct

screw is used and always ensure that when toothed washers are removed they are refitted in their orig-

inal positions.

5.1.3 Releasing Plastic Latches

Many of the parts are held in place with plastic latches. The latches break easi-

ly; release them carefully.

To remove such parts, press the hook end of the latch away from the part to

which it is latched.

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Service Manual

Samsung Electronics

Disassembly and Reassembly

5.2 Parts for Maintenance and Repair

5.2.1 Replacement interval for parts with a limited life

Some of the parts in this printer have a limited life, shorter than that of the whole machine. These parts

must be replaced periodically.

The table below shows the interval at which these parts should be replaced.

The table shows the life of each part, and is measured when using A4 paper. When servicing a machine

always check the status of these parts using the control panel and ensure that parts are replaced at the

appropriate times otherwise a general degradation in print quality will occur.

Item(s)

Pages Printed

Part number

Black toner cartridge Approx. 1,500 pages *

CLP-K300A

Color toner cartridge Approx. 700 pages *

CLP-C300A:Cyan

CLP-M300A:Magenta

CLP-Y300A:Yellow

Imaging unit

Approx. 20,000 black pages or approx.

CLP-R300A

12,500 color pages

Waste toner

Approx. 5,000 images ** or Approx.

CLP-W300A

container

1,250 pages (fulll color ISO 19752 Standard image)

Pick-up roller

Approx. 50,000 pages

Contact a service

Fuser unit

Approx. 100,000 black pages

representative

or 50,000 color pages

T2 roller

Approx. 100,000 pages

ITB

Approx. 60,000 black pages

or 25,000 color pages

* Average A4-/letter-sized page count based on ISO 19752 Standard coverage of individual colors on each page.

Usage conditions and print patterns may cause results to vary.

** Image counts based on one color on each page. If you print documents in full color (Cyan, Magenta, Yellow, Black), the life

of this item will be reduced by 25%.

Service Manual

5-3

Samsung Electronics

Disassembly and Reassembly

5.2.2 Printer Cleaning

A printer should be regularly cleaned, especially if it is used in a dusty environment. This will ensure that

print quality remains high and failure due to contamination of printing services is less likely to occur.

* Clean the printer with a soft, lint free, cloth dipped in a "Recommended cleaner"

"Recommended cleaner" can be purchased from our service center. (where available)

* Do not touch the transfer roller when cleaning the inside of the printer. Grease and oils from the

skin will contaminate the surface and reduce print quality.

* Do not touch transfer roller when cleaning inside of machine. If transfer roller gets dirty, printing

quality could be low.

* Please refer to the User Manual for cleaning instructions.

5-4

Service Manual

Samsung Electronics

Disassembly and Reassembly

5.3 Information Related to Disassembly and Assembly.

5.3.1 Special service parts

Never disassemble or adjust the items mentioned, a stock of these items should be maintained.

1) Disassembly of the LSU unit

There are no serviceable parts inside the

LSU. Alignment of the mirrors is critical.

Opening the LSU will allow dust into the

laser and significantly reduce print quality.

It is very dangerous to operate or service

a machine with the LSU open or system

interlocks disabled. Exposure to laser

radiation can cause blindness.

4) Disassembly of DEVE drive ass'y

and the main drive ass'y

The alignment of the drive mechanism is

critical and it has been set up in factory

using a jig and a driving gear. It is adjust-

ed for the best gearing alignment. If the

motor is disassembled alignment would

not be maintained and this could cause

operational noise and image problems:

image alignment and toner distribution

may be affected.

2) Disassembly of the ITB unit

Do not disassemble the ITB. The align-

ment of the home sensor is critical and is

set up in the factory on a special jig.

Incorrect re-assembly will cause print

quality degradation.

5) Disassembly of terminal parts

Do not adjust the variable resistors on the

PBA. They have been already adjusted in

the factory.

3) Care of the Toner cartridge

Toner cartridges contain an extremely fine

powder. Please keep toner cartridges

away from children. The toner powder

contained in the toner cartridge may be

harmful and if swallowed you should con-

tact a doctor. Take care not to spill toner -

spillages should be cleaned with a

vacume cleaner and washed in could

water (hot water sets the toner). Do not

touch the developer roller surface as cont-

amination will reduce print quality. Take

care not to damage the roller's surface

when installing or removing a toner car-

tridge.

6) Disassembly of the fuser unit

- The fuser melts toner onto the paper at

a high temperature: therefore, you need

to take special care not to get burned by

a hot fuser. When removing the fuser

from a set that has recently been operat-

ing you need to take extra care.

- Do not touch an AC line (Copper con-

tact) on a main frame even after remov-

ing the fuser.

7) When you replace ITB Unit,

be careful with following things;

- When you replace ITB Unit, carefully handle

with ITB Belt. If not, it harms ITB Belt.

- Do not turn ITB Belt back and forth.

If not, waste toner powder would be leaked.

- When shutter is working on an outlet of

waste toner, be careful that waste toner

powder would be leaked

Service Manual

5-5

Samsung Electronics

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