Troubleshooting Guide
D037/D038/D040/D041 6-6 SM Appendix
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 (SP3-015-xxx).
The main scan registrations of M,
C, Y are shifted by more than
±1.4 mm from the main scan
registration of K.
 No defective component
 Defective laser optics housing unit
 Defective BCU
1. Do SP2-111-003 again.
2. Replace the laser unit.
3. Replace the BCU.
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 BCU
1. Do SP2-111-003 again.
2. Replace the image transfer belt.
3. Replace the drum motor.
4. Replace the BCU.
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 BCU
1. Replace the ID sensor.
2. Replace the image transfer belt.
3. Replace the BCU.
The skew for M, C, Y is more
than ± 0.75 mm from the main
scan registration of K. – at the
end of the scan line?
 Defective PCDU
 Defective laser unit
 Defective BCU
1. Reinstall or replace the PCDU.
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