Troubleshooting Guide
SM Appendix 5-1 M065/M066
Appendix:
Trouble-
shooting
Guide
5. APPENDIX: TROUBLESHOOTING GUIDE
5.1 TROUBLESHOOTING GUIDE
 Remove the NVRAM from the original engine control board and install it on the
new one when you replace the engine control board.
5.1.1 BLANK PRINT
Symptom Possible cause Necessary actions
No image is printed.
Defective laser unit Replace the laser unit.
Defective PCDU Replace the PCDU.
Defective image transfer
belt unit
Replace the image transfer
belt unit.
Incorrect action of paper
transfer roller
Check the guide and the
paper transfer roller.
Defective HVPS Replace HVPS.
Defective BCU Replace the BCU.
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