Ricoh Aficio SP4210N Service Manual download pdf (Page 43)

General

SM 3-1 M001

Replacement

Adjustment

3. REPLACEMENT & ADJUSTMENT

3.1 GENERAL

3.1.1 PRECAUTIONS ON DISASSEMBLY

 Always turn off the main power switch and unplug the machine before attempting

any of the procedures in this section.

Use extreme caution when removing and replacing components. The cables in the

machine are located very close to moving parts; proper routing is a must.

After components have been removed, any cables that have been displaced during the

procedure must be restored as close as possible to their original positions. Before

removing any component from the machine, note any cable routings that may be affected.

Before servicing the machine:

1. Verify that documents are not stored in memory.

2. Remove the print cartridge before you remove parts.

3. Unplug the power cord.

4. Work on a flat and clean surface.

5. Replace with authorized components only.

6. Do not force plastic material components.

Make sure all components are returned to their original positions.

Laser Unit

1. Do not loosen or adjust the screws securing the LD drive board on the LD unit. Doing

so will throw the LD unit out of adjustment.

2. Do not adjust the variable resistors on the LD unit, as these are permanently adjusted

at the factory. If replacement of the LD drive board is necessary, replace the entire LD

unit.

3. Keep the polygon mirror and toroidal lens free of dust. Laser performance is very

sensitive to dust on these components.

4. Do not touch the shield glass or the surface of the polygon mirror with bare hands.

5. Do not adjust the Laser Synchronization detector on the LD unit, as these are

permanently adjusted at the factory. If the position of the Laser Synchronization

detector has changed from the factory set position, SC 322 will be shown.

Transfer Roller

CÓPIA NÃO CONTROLADA

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Ricoh Aficio SP4210N Service Manual Page 43