Ricoh Aficio MP C2050 Service Manual

Troubleshooting Guide
D037/D038/D040/D041 6-8 SM Appendix
Test pattern check Possible cause/Countermeasure
shifted, but only at the central
area of the image on the output.
 Deformed center area on the image transfer belt
 Defective BCU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BCU.
The main scan registrations of M,
C, Y are shifted.
 Defective laser optics housing unit
 Defective ID sensor
 Defective BCU
 Incorrect SP value
1. Replace the laser optics housing unit.
2. Replace the ID sensor.
3. Replace the BCU.
4. Adjust the value with SP2-182-004 to -021.
The sub scan registrations of M,
C, Y are shifted.
 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.
The skew of M, C, Y is different.  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.
The sub scan lines are shifted.
Shifted lines appear cyclically.
 Defective PCDU
 Defective drive unit
 Drum phase adjustment error

Ricoh Aficio MP C2050 Specifications