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Confidential
■ Error code 59
The center thermistor of fuser unit detects error.
Self-Diagnostic
Will Automatically Restart within 15 minutes.
Step Cause Remedy
1
Harness connection failure
between fuser unit connector and
paper eject sensor PCB ASSY
Check the harness connection between the
fuser unit connector and paper eject sensor
PCB ASSY, and reconnect it.
2
Harness connection failure
between fuser unit connector and
low voltage power supply PCB
ASSY
Check the harness connection between the
fuser unit connector and low voltage power
supply PCB ASSY, and reconnect it.
3
Harness connection failure
between paper eject sensor PCB
and main PCB
Check the harness connection between the
paper eject sensor PCB and main PCB,
and reconnect it.
4
Paper eject sensor PCB failure Replace the paper eject sensor PCB
ASSY.
5
Low voltage power supply PCB
failure
Replace the low voltage power supply PCB
ASSY.
6 Main PCB failure Replace the main PCB ASSY.
7 Fuser unit failure Replace the fuser unit.
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.
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