Ricoh D117 Service Manual page 448

Test pattern check
The sub scan registrations of M,
C, Y, K are shifted.
The skew of M, C, Y, K is
different.
The sub scan lines are shifted.
Shifted lines appear cyclically.
SM
Possible cause/Countermeasure
Defective image transfer belt

Defective drive units

Defective ID sensor

Defective BICU

Incorrect SP value

1. Replace the image transfer belt.
2. Replace the ID sensor.
3. Replace the drum motor.
4. Replace the BICU.
5. Adjust the value with SP2-182-022 to -039.
Defective PCDU

Defective laser optics housing unit

Defective BICU

1. Reinstall or replace the PCDU.
2. Perform the color skew adjustment (
3. Replace the laser optics housing unit.
4. Replace the BICU.
Defective PCDU

Defective drive unit

Drum phase adjustment error

1. Reinstall or replace the PCDU.
2. Check or replace the drive unit.
6-87
Troubleshooting Guide
p.4-3).
D117/D118