Text preview for : 20060919095901218_05-Disassembly.pdf part of Samsung CLP-300 Complete Service manual for Samsung CLP-300
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Disassembly and Reassembly
5. Disassembly and Reassembly
5.1 Precautions When Replacing Parts 5.1.1 Precautions when assembling and disassembling 5.1.2 Precautions when handling PBA 5.2 Parts for Maintenance and Repair 5.2.1 Replacement interval for parts with a limited life 5.2.2 Printer Cleaning 5.3 Information Related in Disassembly and Assembly 5.3.1 Special Service Parts 1) Disassemble of LSU Unit 2) Disassemble of ITB Unit 3) Custody of OPC Unit 4) Custody of Toner Cartridge 5) Disassemble of DEVE Drive Ass'y and Main Drive Ass'y 6) Disassemble of Terminal Parts 7) Disassemble of Fuser Unit 5.3.2 Screws Used in the Printer 5.3.3 Opening Covers and replacing Consumable parts >> Consumable parts removal 5.4 Disassembly Procedure 5.4.1 Cover Unit 5.4.2 Fuser Ass'y 5.4.3 LSU(Laser Scan Unit) 5.4.4 HVPS(High Voltage Power Supply 5.4.5 Main Board 5.4.6 SMPS(Switching Mode Power Supply) 5.4.7 Drive Ass'y 5.4.8 Transfer Roller page(5-2) page(5-2) page(5-2) page(5-3) page(5-3) page(5-4) page(5-5) page(5-5) page(5-5) page(5-5) page(5-5) page(5-5) page(5-5) page(5-5) page(5-5) page(5-6) page(5-10) page(5-10) page(5-10) page(5-10) page(5-11) page(5-12) page(5-12) page(5-13) page(5-13) page(5-14) page(5-14)
Service Manual Samsung Electronics
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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 malfunction 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 electrical charge on the body. 2. Take care not to touch the PBA with your bare hands or metal objects as you could create a short circuit or get an electric shock. Take extra care when handling PBAs with moving parts fitted such as sensors, 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 original positions.
5.1.3 Releasing Plastic Latches
Many of the parts are held in place with plastic latches. The latches break easily; release them carefully. To remove such parts, press the hook end of the latch away from the part to which it is latched.
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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) Black toner cartridge Color toner cartridge Pages Printed Approx. Initial : 1,500 pages* Sales : 2,000 pages* Approx. Initial : 700 pages* Sales : 1,000 pages* Approx. 20,000 black pages or approx. 12,500 color pages Approx. 5,000 images** or Approx. 1,250 pages (fulll color ISO Standard image) Approx. 50,000 pages Approx. 100,000 black pages or 50,000 color pages Approx. 100,000 pages Approx. 60,000 black pages or 25,000 color pages Part number CLP-K300A CLP-C300A:Cyan CLP-M300A:Magenta CLP-Y300A:Yellow CLP-R300A CLP-W300A Contact a service representative Engineer Replacement Remark User Replacement
Imaging unit Waste toner container Pick-up roller Fuser unit T2 roller ITB
* 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%.
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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.
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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 adjusted 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 alignment 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 contact 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 contamination will reduce print quality. Take care not to damage the roller's surface when installing or removing a toner cartridge.
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 operating you need to take extra care. - Do not touch an AC line (Copper contact) on a main frame even after removing 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
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Disassembly and Reassembly
5.3.2 Screws used in the printer
The screws listed in the table below are used in this printer. Please ensure that, when you disassemble the printer, you keep a note of which screw is used for which part and that, when reassembling the printer, the correct screws are used in the appropriate places.
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5.4 Disassembly Procedure
5.4.1 Cover Unit
1. Open a Front-Cover and Remove the Imagine Unit. 3. Unscrew 2 screws on the Top Cover and then remove the Top Cover.
2. Remove the ITB Unit 1) Pull out the unit toward out side of printer slightly. 2) Lift up the unit gently. 3) Pull out the unit gently.
4. Unscrew 1 screw on the Right Cover and then remove the Right Cover after open the Rear Cover.
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5. Remove the Left Cover.
5.4.2 Fuser Ass'y
1. Unscrew 4 screws on the Fuser after open the Rear Cover. 2. Push the Holder Shaft Fuser as shown in Picture. 3. Take out the Fuser Ass'y from Printer.
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Disassembly and Reassembly
5.4.3 LSU(Laser Scan Unit)
1. Follow step 1 through step 3 in Cover Unit Disassembly 2. Lift up the LSU Cover(as shown in Picture) and then take out. 3. Remove 4 screws and then take out the LSU.
5.4.4 HVPS(High Voltage Power Supply)
1. Follow step 1 through step 5 in Cover Unit Disassembly except removing Righ Cover 2. Unscrew 6 screws and then take out the HVPS. Be careful of taking out the HVPS because there are 7 High Voltage Terminal behind HVPS.
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5.4.5 Main Board
1. Follow step 1 through step 4 in Cover Unit Disassembly 2. Unscrew 5 screws and then take out the Main Board after plug out all the Harness.
5.4.6 SMPS(Switching Mode Power Supply)
1. Follow step 1 through step 4 in Cover Unit Disassembly 2. Remove the Main Board 3. Unscrew 2 screws and then take out the SMPS after plug out all the Harness.
Service Manual Samsung Electronics
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Disassembly and Reassembly
5.4.7 Drive Ass'y
1. Follow step 1 through step 4 in Cover Unit Disassembly 2. Remove the Main Board 3. Remove the SMPS 4. Unscrew 8 screws and then take out the Drive Ass'y.
5.4.8 Transfer Roller
1. Open Rear Cover. 2. Pull back the hook, which holds the Roller, like below picture and remove the Transfer Roller
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