Troubleshooting Guide
SM Appendix 6-5 D037/D038/D040/D041
Appendix:
Trouble-
shooting
Guide
Test pattern check Possible cause/Countermeasure
2. Replace the laser unit.
3. Replace the BCU.
Others
 Skew correction upper limit error
 Defective BCU
 Defective laser unit
1. Replace the BCU.
2. Replace the laser unit.
After Executing SP2-111-003
 Result: "1" in SP2-194-007
 Result: "0" in SP2-194-010, -011, -012.
Test pattern check Possible cause/Countermeasure
Do SP2-111-001 or -002.
After Executing SP2-111-001
 Result: "1" in SP2-194-007
 Result: "2" or "3" (Line pattern detection failure) in SP2-194-010, -011, -012
Test pattern check Possible cause/Countermeasure
White image, Abnormal image,
Low density
 Defective image processing unit
 Low density of test pattern
 Defective BCU
1. Replace the high voltage power supply unit.
2. Do the forced process control (SP3-011-001) or
supply some toner (SP3-015-xxx).
3. Replace the BCU.
Normal image, but with color
registration errors
 Defective ID sensor
 Defective BCU
1. Replace the ID sensor.
2. Replace the BCU.
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