Brother DCP-7030 Service Manual page 30

■ Error code 71
Print Unable 71
See Troubleshooting and routine maintenance chapter in User's Guide.
Laser unit Polygon mirror motor failure
(Cannot detect the period signal of the polygon mirror motor.)
Error code 72
Print Unable 72
See Troubleshooting and routine maintenance chapter in User's Guide.
BD beam detect sensor malfunction
Step
Laser unit harness connection
1
failure
2 Laser unit failure
3 Main PCB failure
■ Error code 76
Print Unable 76
See Troubleshooting and routine maintenance chapter in User's Guide.
Fuser unit failure (The center thermistor detects rapidly rising temperature.)
Step
Fuser unit harness connection
1
failure
2 Fuser unit failure
■ 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
1 Fuser unit failure
2 Main PCB failure
Cause
Cause
Cause
1-12
Remedy
Check the two harness connections of the
laser unit and reconnect them.
Replace the laser unit.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the fuser
unit and reconnect it.
Replace the fuser unit.
Remedy
Replace the fuser unit.
Replace the main PCB ASSY.
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