Ricoh MPC 2800 AT-C2 Mode D'emploi page 487

Test pattern check
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 is more than ±
0.75 mm from the main scan
registration of K. – at the end of the scan
line?
Others
After Executing SP2-111-001
• Result: "0" in SP2-194-007
• Result: No color registration errors in SP2-194-010, -011, -012
Test pattern check
The main scan registration of K is
shifted.
The main scan length of K is shifted.
After Executing SP2-111-001
• Result: "0" in SP2-194-007
• Result: Color registration errors in SP2-194-010, -011, -012
Possible cause/Countermeasure
• 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 PCU
• Defective laser optics housing unit
• Defective BICU
1. Reinstall or replace the PCU.
2. Replace the laser optics housing unit.
3. Replace the BICU.
• Skew correction upper limit error
• Defective BICU
• Defective laser optics housing unit
1. Replace the BICU.
2. Replace the laser optics housing unit.
Possible cause/Countermeasure
• Abnormal SP setting value of main scan: K
Adjust the value with SP2-101-001.
• Abnormal SP setting value of main scan length detection:
K
Adjust the value with SP2-185-001.
Troubleshooting Guide
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