Service manual

Error Cause
M085/M086 6-18 SM
Error code 79
Print Unable 79
See Troubleshooting and routine maintenance chapter in User’s Guide.
No detection of the internal temperature thermistor.
Step Cause Remedy
1 Harness connection failure of
internal temperature thermistor
Check the harness connection of
the internal temperature thermistor,
and reconnect it.
2 Internal temperature thermistor
failure
Replace the internal temperature
thermistor.
3 Main PCB failure Replace the main PCB ASSY.
Error code 7A
Print Unable 7A
See Troubleshooting and routine maintenance chapter in User’s Guide.
No detection of the main motor lock signal.
Step Cause Remedy
1 Main motor failure Replace the main motor ASSY.
2 Main PCB failure Replace the main PCB ASSY.