Ricoh IM C300

Troubleshooting for Image Quality Problems
D0CA/D0C9/D0C8/D0CB 6-146 SM
Test pattern check Possible cause/Countermeasure
The sub scan registrations of M, C, Y, K are
shifted.
• Defective image transfer belt
• Defective drive units
• Defective ID sensors (S27-S29)
• Defective BiCU (PCB1)
• Incorrect SP value
1. Replace the image transfer belt.
2. Replace the ID sensors (S27-S29).
3. Replace the drum motor (M10,M11).
4. Replace the BiCU (PCB1).
5. Adjust the value with SP2-182-022 to -039.
The skew of M, C, Y, K is different.
• Defective PCDU
• Defective laser optics housing unit
• Defective BiCU (PCB1)
1. Reinstall or replace the PCDU.
2. Perform the color skew adjustment (Image
Adjustment).
3. Replace the laser optics housing unit.
4. Replace the BiCU (PCB1).
The sub scan lines are shifted. Shifted lines
appear cyclically.
• Defective PCDU
• Defective drive unit
• Drum phase adjustment error
1. Reinstall or replace the PCDU.
2. Check or replace the drive unit.
6.12.7 BLANK PRINT
Symptom Possible cause Necessary actions
No image is
printed.
Defective laser unit Replace the laser unit.
Defective PCDU Replace the PCDU.
Defective image transfer belt unit Replace the image transfer belt unit.
Incorrect action of paper transfer
roller
Check the guide and the paper transfer
roller.
Defective HVPS Replace HVPS.
Defective BiCU (PCB1) Replace the BiCU (PCB1).