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CHAPTER IV -24
M-5 Insufficient output from high-voltage power supply unit
Possible cause Step Check Result Remedy
High-voltage
contact
1 Do any of the terminals on the
high-voltage contacts have dirt
or contact burns?
Yes Clean the high-voltage contact.
2 Check the connection of the
harness between the high-
voltage power supply and the
driver PCB is OK.
Yes Replace the high-voltage power
supply PCB.
No Reconnect the harness
between the high-voltage
power supply and the driver
PCB.
M-6 SR PCB failure
Possible cause Step Check Result Remedy
SR bias contact 1 Do any of the terminals on the
SR contacts have dirt or
contact burns?
Yes Clean the SR bias contact.
Ditto 2 Check the connection of the
harness between the SR PCB
and the driver PCB.
Yes Replace the SR PCB.
M-7 Fixing heater temperature failure
Possible cause Step Check Result Remedy
Poor thermistor
harness contact
1 Are the connectors on the
erase lamp PCB and the high-
voltage power supply PCB
secured correctly?
No Connect the connectors
securely.
Blown thermal
fuse
2 Remove the fixing unit and
measure the resistance
between the input connectors.
Is it open circuit?
Yes Replace the fixing unit.
Thermistor
failure
3 Is the thermistor installed
properly?
Yes Replace the fixing unit.
No Reinstall the thermistor
properly.
Halogen heater
lamp failure
4 Remove the fixing unit and
measure the resistance of the
fixing unit lamp. Is it open
circuit?
Yes Replace the halogen heater
lamp.