Ricoh M281 Series Service Manual page 453

SC No. Type
SC No. Type
SC270-00 D
SM
Error Name/Error Condition/Major Cause/Solution

Laser unit defective (Synchronization optical system
defective, LDB defective, LD defective)

BiCU defective (Image writing ASIC defective)

IOB defective

LDB – IOB, IOB – BiCU harness broken, or connector
disconnected
1. Turn the main power OFF/ON.
2. Check for condensation on the mirrors and lenses.
3. Reconnect the connectors between LDB and IOB, and
between IOB and BiCU.
4. Replace the laser unit.
5. Replace the BiCU.
6. Replace the harness between LDB and IOB, and between
IOB and BiCU.
7. Replace the IOB.
Error Name/Error Condition/Major Cause/Solution
GAVD Communication Error
The communication is not performed normally between CPU
and image writing ASIC.
Error detection timing; Only when initial setting is executed.

Image writing ASIC defective

Interface circuit between CPU and image writing ASIC
defective
1. Turn the main power OFF/ON.
2. Replace the BiCU.
6-15
Service Call 202-270
D255/D256/M281/M282