Image Problems At Regular Intervals - Ricoh D104 Field Service Manual

6. Troubleshooting
Test pattern check
The sub scan registrations of M, C, Y
are shifted.
The skew of M, C, Y is different.
6
The sub scan lines are shifted. Shifted
lines appear cyclically.

Image Problems at Regular Intervals

If a defect occurs in the image at one of these intervals, the related component may be defective.
650
Possible cause/Countermeasure
• Defective image transfer belt
• Defective drive units
• Defective ID sensor
• Defective BCU
• Incorrect SP value
1. Replace the image transfer belt.
2. Replace the ID sensor.
3. Replace the drum motor.
4. Replace the BCU.
5. Adjust the value with SP2-182-022 to -039.
• Defective PCDU
• Defective laser optics housing unit
• Defective BCU
1. Reinstall or replace the PCDU.
2. Replace the laser optics housing unit.
3. Replace the BCU.
• Defective PCDU
• Defective drive unit
• Drum phase adjustment error
1. Do SP1-902-001 (Drum phase adjustment); see
Replacement and Adjustment – Drive Unit – Gear Unit for
details.
2. Reinstall or replace the PCDU.
3. Check or replace the drive unit.