Transfer Belt Unit - Ricoh MP 7503SP Field Service Manual

2. Make sure that the drum unit is set in position and the drum stay is secured with the screw before
the main switch is turned on.
3. If the drum unit is loose, poor contact of the drum connectors may cause electrical noise, resulting
in unexpected malfunctions (RAM data change is the worst case).
4. To avoid scratching the drum, always remove the development unit before removing the drum unit.

Transfer Belt Unit

1. Never touch the transfer belt surface with bare hands.
2. Take care not to scratch the transfer belt, as the surface is easily damaged.
3. Before installing the new transfer belt, clean all the rollers and the inner part of the transfer belt with
a dry cloth to prevent the belt from slipping.
Scanner Unit
1. When installing the exposure glass, make sure that the white dot is at the rear upper left corner.
2. Clean the exposure glass with alcohol or glass cleaner to reduce the amount of static electricity on
the glass surface.
3. Use a cotton pad with water or a blower brush to clean the mirrors and lens.
4. Never bend or crease an exposure lamp cable.
5. Never disassemble the lens unit. Doing so will throw the lens and the copy image out of focus.
6. Never adjust any of the CCD positioning screws. These screws are paint-locked and should never
be removed.
Laser Unit
1. Never loosen the screws that secure the LD drive board to the laser diode casing. Doing so would
throw the LD unit out of adjustment.
2. Never adjust the variable resistors on the LD unit, as they are adjusted in the factory.
3. Never open the optical housing unit. The polygon mirror and F-theta lenses are very sensitive to
dust
4. Never touch the glass surface of the polygon mirror motor unit with bare hands.
5. After replacing the LD unit, do the laser beam pitch adjustment. Otherwise, an SC condition will be
generated.
Charge Corona
1. Clean the corona wires with a dry cloth. Never use sandpaper or an organic solvent.
Before You Begin
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