Test pattern check Possible cause/Countermeasure
White image, Abnormal image,
Low density
• Defective laser optics housing unit shutter
• Defective image processing unit
•
Low density of test pattern
• Defective BICU
1. Replace the shutter motor.
2. Replace the high voltage power supply unit.
3. Do the forced process control (SP3-011-001) or supply
some toner (SP3-030-xxx).
4. Replace the BICU.
Normal image, but with color
registration errors
• 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.
After Executing SP2-111-001
•
Result: "1" in SP2-194-007
•
Result: "5" (Out of adjustable range) in SP2-194-010, -011, -012
Test pattern check Possible cause/Countermeasure
Low image density on the output • Low pattern density
Do the forced process control (SP3-011-001) or supply
some toner (SP3-030-xxx).
The main scan registrations of M, C,
Y, K are shifted by more than ±1.4.
• 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.
6. Troubleshooting
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