Ricoh MP C307 Field Service Manual page 510

Troubleshooting Guide
Test pattern check
After Executing SP2-111-003
•
Result: "1" in SP2-194-007
•
One of results: "5" (Out of adjustable range) in SP2-194-010, -011, -012, -013
The main scan registrations of M, C, Y, K are shifted by more than
±15.
The sub scan registrations of M, C, Y, K are shifted by more than
±20.
The main scan registration is shifted by more than ±0.66 mm, but
only at the central area of the image on the output.
The skew for M, C, Y, K is more than ±0.75 mm.
Others
504
3. Replace the BiCU.
Test pattern check
Possible cause/Countermeasure
Possible cause/Countermeasure
•
Defective laser unit
•
Defective BiCU
1. Perform the color skew adjustment
(Image Adjustment).
2. Replace the laser unit.
3. Replace the BiCU.
•
Defective image transfer belt
•
Defective drive units
•
Defective BiCU
1. Replace the image transfer belt.
2. Replace the drum motor.
3. Replace the BiCU.
•
Defective ID sensor at center
•
Deformed center area on the image
transfer belt
•
Defective BiCU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BiCU.
•
Defective PCDU
•
Defective laser optics housing unit
•
Defective BiCU
1. Perform the color skew adjustment
(Image Adjustment).
2. Reinstall or replace the PCDU.
3. Replace the laser optics housing unit.
4. Replace the BiCU.
•
Skew correction upper limit error
•
Defective BiCU
•
Defective laser optics housing unit
1. Perform the color skew adjustment
(Image Adjustment).