Ricoh Aficio MP C2030, Service Manual

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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.
ƒ Deformed center area on the image transfer belt
ƒ
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.
ƒ
Defective laser optics housing unit
ƒ Defective ID sensor
ƒ Defective BCU
ƒ 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.
ƒ Defective image transfer belt
ƒ
Defective drive units
ƒ Defective ID sensor
ƒ Defective BCU
ƒ 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. ƒ Defective PCDU
ƒ Defective laser optics housing unit
ƒ 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.
ƒ Defective PCDU
ƒ Defective drive unit
ƒ Drum phase adjustment error