45850101TH Rev.1
2-32
2. TROUBLESHOOTING PROCEDURES
Panel display Cause Check details Result Solution
Inspection is
required.
166:Error xx
An abnormality
was detected
with the
power supply
temperature
thermistor.
01 : The power
supply thermistor
is detected as
shorted.
02 : The power
supply thermistor
is detected as
open.
03 : The power
supply thermistor
indicates high
temperature
error.
04 : The power
supply thermistor
indicates low
temperature
error.
01, 02:
Does this error recur?
Does this error recur?
Does this error recur?
03:
Does this error recur?
Does this error recur?
Does this error recur?
04:
Does this error recur?
Does this error recur?
Does this error recur?
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Cycle the power.
Replace the high voltage
power supply unit.
Replace the CU/PU board.
Replace the cable between
the high voltage power supply
unit and the CU/PU board.
Remove anything obstructing
the ventilation slots if any and
restore the power.
Replace the high voltage
power supply unit.
Replace the CU/PU board.
Replace the cable between
the high voltage power supply
unit and the CU/PU board.
Raise the room temperature
and restore the power.
Replace the high voltage
power supply unit.
Replace the CU/PU board.
Replace the cable between
the high voltage power supply
unit and the CU/PU board.
Inspection is
required.
167:Error
An abnormality
was detected
with the
thermistor.
Is the error message
displayed?
Does this error recur?
Ye s
Ye s
Cycle the power.
Replace the fuser unit.
Panel display Cause Check details Result Solution
Inspection is
required.
168:Error xx
An abnormality
was detected
with the
Compensation
Thermistor
01 : The
compensation
thermistor is
detected as
shorted.
02 : The
compensation
thermistor is
detected as
open.
03 : The
compensation
thermistor
indicates high
temperature
error.
04 : The
compensation
thermistor
indicates low
temperature
error.
Is the error message
displayed?
Does this error recur?
Ye s
Ye s
Cycle the power.
Replace the fuser unit.
Inspection is
required.
169:Error xx
An abnormality
was detected
with the Upper
side Thermistor
01 : The upper
side thermistor
is detected as
shorted.
02 : The upper
side thermistor
is detected as
open.
03 : The upper
side thermistor
indicates high
temperature
error.
04 : The upper
side thermistor
indicates low
temperature
error.
Is the error message
displayed?
Does this error recur?
Ye s
Ye s
Cycle the power.
Replace the fuser unit.