Ricoh M281 Series Service Manual page 446

Service Call 101-195
SC No. Type
SC102-00 D
D255/D256/M281/M282
Error Name/Error Condition/Major Cause/Solution
LED Light Quantity Error
The white level peak exceeded the prescribed threshold when
the white guide plate was scanned.
Error detection timing; During the scanner adjustment (detecting
the lighting error) at the time of applying power source for
scanner (when the main power is turned ON).

Connector disconnected

Scanner Carriage defective

BiCU defective

Harness defective

IOB defective
Check if the SC occurs by turning the main 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. Reconnect the connector.
Reconnect the following connectors;

Scanner Carriage – BiCU connector

SBU – LEDB connector (SBU side connector on the
scanner carriage)

BiCU – IOB harness
2. Check the white guide plate (exposure glass).
Check the white guide plate attached to the exposure glass.
If the white guide plate is in an unusual state, replace the
white guide plate.
3. Scanner carriage defective
Replace the scanner carriage.
4. BiCU defective
Replace the BiCU.
5. Harness defective
Replace the following harnesses.

Scanner Carriage – BiCU harness

BiCU – IOB harness
6. IOB defective
Replace the IOB.
6-8 SM