Ricoh D025 - Page 563

Troubleshooting Guide
SM Appendix 5-5 D023/D025
Appendix
Trouble-
shooting
Guide
Test pattern check Possible cause/Countermeasure
The main scan registrations of M,
C, Y are shifted by more than ±15
mm from the main scan
registration of K.
 Defective laser optics housing unit
 Defective BICU
1. Replace the laser optics housing unit.
2. Replace the BICU.
The sub scan registrations of M,
C, Y are shifted by more than ±20
mm from the sub scan
registration of K.
 Defective image transfer belt
 Defective drive units
 Defective BICU
1. Replace the image transfer belt.
2. Replace the drum motor.
3. Replace the BICU.
The main scan registration is
shifted by more than ±0.66 mm,
but only at the central area of the
image on the output.
 Defective ID sensor at center
 Deformed center area on the image transfer belt
 Defective BICU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BICU.
The skew for M, C, Y is more
than ±0.75 mm from the main
scan registration of K
 Defective PCU
 Defective laser optics housing unit
 Defective BICU
1. Reinstall or replace the PCU.
2. Replace the laser optics housing unit.
3. Replace the BICU.
Others
 Skew correction upper limit error
 Defective BICU
 Defective laser optics housing unit
1. Replace the BICU.
2. Replace the laser optics housing unit.