Test pattern check Possible cause/Countermeasure
The sub scan registrations of M, C, Y
are shifted by more than ±1.4mm
from the sub scan registration of K.
• 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.
The main scan registration is shifted
by more than ±0.66 mm, but only at
the central area of the image on the
output.
• 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.
The skew for M, C, Y, K is more than
± 0.75 mm at the end of the scan
line?
• Defective PCDU
• Defective laser optics housing unit
• Defective BICU
1. Perform the color skew adjustment (
p.159).
2.
Reinstall or replace the PCDU.
3.
Replace the laser optics housing unit.
4. Replace the BICU.
Others • Skew correction upper limit error
• Defective BICU
•
Defective laser optics housing unit
1. Replace the BICU.
2. Perform the color skew adjustment (
p.159).
3. Replace the laser optics housing unit.
After Executing SP2-111-001
• Result: "0" in SP2-194-007
•
Result: Color registration errors in SP2-194-010, -011, -012, -013
Troubleshooting Guide
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