Ricoh M022, Service Manual

Page: 713 / 1152

Test pattern check Possible cause/Countermeasure
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 BCU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BCU.
The skew for M, C, Y is more than
±0.75 mm from the main scan
registration of K
• 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.
Others
• Skew correction upper limit error
• Defective BCU
• Defective laser optics housing unit
1. Replace the BCU.
2. Replace the laser optics housing unit.
After Executing SP2-111-003
• Result: "1" in SP2-194-007
• Result: "0" in SP2-194-010, -011, -012.
Test pattern check Possible cause/Countermeasure
Do SP2-111-001 or -002.
After Executing SP2-111-001
• Result: "1" in SP2-194-007
• Result: "2" or "3" (Line pattern detection failure) in SP2-194-010, -011, -012
Troubleshooting Guide
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