Ricoh Aficio SP 100, Service Manual

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SC220 C4 D Beam Synchronization Error
Top cover (or maintenance cover) is down and locked, and the polygon
motor is locked, but laser synchronization could not be achieved within
40 msec.
• The I/F harness of the LDB is loose, broken defective
• Polygon motor is locked
• The angle of incidence of the laser beam and photo-detector is not
correct
• Cycle the machine off/on
• Replace the I/F harness
• Replace polygon motor
• Replace laser unit
• Replace main board
SC400: Around the Drum
SC491 C5 D Bias Leak
A bias leak has occurred for the drum charge, development charge, or
transfer charge. PWM signals are sampled at 20 msec. intervals. This SC
is issued if 10 PWM samplings within 200 msec. are abnormal.
• HVPS harness loose, broken, defective
• HVPS board defective
• AIO terminal defective
• Cycle the machine off/on
• Check all the harness connections of the HVPS
• Check spring-loaded AIO terminal installation behind the HVPS.
• Replace HVPS
SC500: Paper Feed, Transport
SC500 C6 D Main Motor Error
6. Troubleshooting
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