Ricoh MPC 2800 AT-C2 Mode D'emploi page 484

5. Appendix: Troubleshooting Guide
Test pattern check
Normal image, but with color
registration errors
5
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.
Test pattern check
The main scan registrations of M, C, Y
are shifted by more than ±15 mm from
the main scan registration of K.
The sub scan registrations of M, C, Y
are shifted by more than ±20 mm from
the sub scan registration of K.
The main scan registration is shifted by
more than ±0.66 mm, but only at the
central area of the image on the output.
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Possible cause/Countermeasure
2. Replace the high voltage power supply unit.
3. Do the forced process control (SP3-011-001) or supply
some toner (SP3-015-xxx).
4. Replace the BICU.
• Defective ID sensor shutter
• Defective ID sensor
• Defective BICU
1. Replace the ID sensor shutter solenoid.
2. Replace the ID sensor.
3. Replace the BICU.
Possible cause/Countermeasure
• Defective laser optics housing unit
• Defective BICU
1. Replace the laser optics housing unit.
2. 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.