Service manual

2-44
Confidential
■ Error code 71
Polygon motor error in the laser unit.
Error code 72
Beam detecting sensor error of the laser unit.
■ Error code 73
These errors do not usually occur in the normal use. The conceivable causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
Error, which cannot be specified, occurs.
Error code 74
Error, which cannot be specified, occurs.
Print Unable 71
Turn the power off and then back on again.
Print Unable 72
Turn the power off and then back on again.
Step Cause Remedy
1
Correction value error of laser unit Input the correction value of the laser unit
correctly.
2
Harness connection failure of laser
unit
Check the harness connection of the laser
unit and reconnect them.
3 Main PCB failure Replace the main PCB ASSY.
4 Laser unit failure Replace the laser unit.
Print Unable 73
Turn the power off and then back on again.
Replace Toner
Open the Front Cover, replace Toner Cartridge.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.