Ricoh MP C307 - Page 512

Troubleshooting Guide
506
Test pattern check Possible cause/Countermeasure
2. Replace the laser optics housing unit.
3. Replace the BiCU.
The sub scan registrations of M, C, Y are shifted by more
than ±1.4mm from the sub scan registration of K.
• No defective component
• Defective image transfer belt
• Defective drive units
• Defective BiCU
1. Do SP2-111-003 again.
2. Replace the image transfer belt.
3. Replace the drum motor.
4. Replace the BiCU.
The main scan registration is shifted by more than ±0.66
mm, but only at the central area of the image on the output.
• 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.
The skew for M, C, Y, K is more than ± 0.75 mm at the end
of the scan line?
• 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.
Others
• Skew correction upper limit error
• Defective BiCU
• Defective laser optics housing unit
1. Replace the BiCU.
2. Perform the color skew adjustment (Image
Adjustment).
3. Replace the laser optics housing unit.
After Executing SP2-111-001
• Result: "0" in SP2-194-007
• Result: Color registration errors in SP2-194-010, -011, -012, -013
Test pattern check Possible cause/Countermeasure
Low image density on the output
• Low pattern density