Ricoh M281 Series Service Manual page 445

SC No. Type
SM
Error Name/Error Condition/Major Cause/Solution

Condensation in scanner unit

Connector disconnected

Scanner Carriage defective

BiCU defective

Harness defective

White Guide Plate dirty or attachment fault

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.
6-7
Service Call 101-195
D255/D256/M281/M282