Ricoh SAVIN D0AP Service Manual page 463

SC No. Type
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•
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Power cycle the machine to see if the error reoccurs. If the SC occurs again,
do the following steps. Check if the SC reoccurs by cycling the power off/on
after each step.
1.
2.
3.
4.
5.
SC No. Type
SC490-00 D High voltage power: Charge/development bias output error
An error signal was detected continuously for 200 ms during charge bias
output.
Hardware related causes:
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Load related causes:
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Check if the SC occurs by turning the power OFF then ON. If the SC occurs
again, do the following steps. Check if the SC reoccurs by cycling the power
after each step.
1.
2.
SM
Error Name/Error Condition/Major Cause/Solution
Harness defective
Engine board malfunction due to signal error
HVPS defective
Reconnect the CN800 connector on HVPS.
Reconnect the CN220 connector on engine board (Printer: BCU, MF:
SCB).
Replace the HVPS.
Replace the engine board (Printer: BCU, MF: SCB).
Replace the harnesses on HVPS.
Error Name/Error Condition/Major Cause/Solution
Contact failure
Loose, broken, or defective connector on the controller side
Grounding, open-circuit in the high voltage route
Arc discharge due to lack of space
The shorted harness on the controller side
Engine board malfunction due to signal error
HVPS defective
Short-circuit
Arc discharge due to lack of space
Drum deterioration, or condensation on drum caused by overcurrent
Drum condensation, pinhole overcurrent
The incorrect gap between the drum and charge roller
Overcurrent due to condensation on the drum surface
Re-install the PCDU.
Check if there are scratches on the drum surface. If you can see the
internal element of the drum (bare metal) on the surface, replace the
6-17 D0AP/D0C4/D0C5/D0C6/M0BQ/M0D1
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