Error Code - Brother DCP-7055 Service Manual

■ Error code 59

Self-Diagnostic
Will Automatically Restart within 15 minutes.
The center thermistor of fuser unit detects error.
Step
Harness connection failure
1 between fuser unit connector and
paper eject sensor PCB ASSY
Harness connection failure
between fuser unit connector and
2
low voltage power supply PCB
ASSY
Harness connection failure
3 between paper eject sensor PCB
and main PCB
Paper eject sensor PCB failure
4
Low voltage power supply PCB
5
failure
6 Main PCB failure
7 Fuser unit failure
CAUTION :
• Turn off the power switch once, and after checking that the fuser unit sufficiently cools
down, turn on the power switch again and leave the machine for ten minutes. Then, this
problem may be cleared.
Cause
2-38
Remedy
Check the harness connection between the
fuser unit connector and paper eject sensor
PCB ASSY, and reconnect it.
Check the harness connection between the
fuser unit connector and low voltage power
supply PCB ASSY, and reconnect it.
Check the harness connection between the
paper eject sensor PCB and main PCB,
and reconnect it.
Replace the paper eject sensor PCB
ASSY.
Replace the low voltage power supply PCB
ASSY.
Replace the main PCB ASSY.
Replace the fuser unit.
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