Ricoh MPC 2800 AT-C2 Mode D'emploi page 486

5. Appendix: Troubleshooting Guide
Test pattern check
Normal image, but with color
registration errors
After Executing SP2-111-001
• Result: "1" in SP2-194-007
5
• Result: "5" (Out of adjustable range) in SP2-194-010, -011, -012
Test pattern check
Low image density on the output
The main scan registrations of M, C, Y
are shifted by more than ±1.4 mm from
the main scan registration of K.
The sub scan registrations of M, C, Y
are shifted by more than ±1.4mm from
the sub scan registration of K.
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Possible cause/Countermeasure
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
• Low pattern density
Do the forced process control (SP3-011-001) or supply some
toner (SP3-015-xxx).
• No defective component
• Defective laser optics housing unit
• Defective BICU
1. Do SP2-111-003 again.
2. Replace the laser optics housing unit.
3. Replace the BICU.
• 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.