ng
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.
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.4-3).
2. Reinstall or replace the PCDU.
3. Replace the laser optics housing unit.
4. Replace the BICU.
To Next Page
Loading...
Need help?
General
