Service Call 202-270
SM 6-15 D255/D256/M281/M282
SC No. Type 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.
SC No. Type Error Name/Error Condition/Major Cause/Solution
SC270-00 D 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.
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