Service manual

Error Cause
SM 6-17 M085/M086
Trouble –
shooting
Error code 77
Print Unable 77
See Troubleshooting and routine maintenance chapter in User’s Guide.
Fuser error code failure (The error history of the fuser unit is deleted.)
Step Cause Remedy
1 Fuser unit failure Replace the fuser unit.
2 Main PCB failure Replace the main PCB ASSY.
Error code 78
Print Unable 78
See Troubleshooting and routine maintenance chapter in User’s Guide.
Fuser unit failure (The temperature sensor of the fuser unit is broken.)
Step Cause Remedy
1 Fuser unit failure Replace the fuser unit.
2 Main PCB failure Replace the main PCB ASSY.