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Test pattern check Possible cause/Countermeasure
The sub scan registrations of M,
C, Y, K are shifted by more than
±20.
ï‚§ Defective image transfer belt
ï‚§ Defective drive units
ï‚§ Defective BICU
1. Replace the image transfer belt.
2. Replace the drum motor.
3. 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.
ï‚§ Defective ID sensor at center
ï‚§ Deformed center area on the image transfer belt
ï‚§ 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.
ï‚§ Defective PCDU
ï‚§ Defective laser optics housing unit
ï‚§ Defective BICU
1. Perform the color skew adjustment (
p.4-3).
2. Reinstall or replace the PCDU.
3. Replace the laser optics housing unit.
4. Replace the BICU.
Others
ï‚§ Skew correction upper limit error
ï‚§ Defective BICU
ï‚§ Defective laser optics housing unit
1. Perform the color skew adjustment (
p.4-3).
2. Replace the BICU.
3. Replace the laser optics housing unit.
After Executing SP2-111-003
ï‚§ Result: "1" in SP2-194-007
ï‚§ Result: "0" in SP2-194-010, -011, -012, -013