Test pattern check Possible cause/Countermeasure
White image, Abnormal image, Low
density
• Defective image processing unit
• Low density of test pattern
•
Defective BICU
1. Replace the high voltage power supply unit.
2. Do the forced process control (SP3-011-001) or supply
some toner (SP3-030-xxx).
3. 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 SP2-111-003
•
Result: "1" in SP2-194-007
•
One of results: "5" (Out of adjustable range) in SP2-194-010, -011, -012, -013
Test pattern check Possible cause/Countermeasure
The main scan registrations of M, C,
Y, K are shifted by more than ±15.
• Defective laser unit
• Defective BICU
1.
Perform the color skew adjustment (
p.159).
2. Replace the laser unit.
3.
Replace the BICU.
The sub scan registrations of M, C, Y,
K are shifted by more than ±20.
• Defective image transfer belt
• Defective drive units
•
Defective BICU
1. Replace the image transfer belt.
2. Replace the drum motor.
3. Replace the BICU.
6. Troubleshooting
706
To Next Page
Loading...
Need help?
General
