Brother DCP-8065DN

Confidential
9-23
(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 terminals.
Yes Replace the high-voltage power
supply PCB.
High-voltage
power supply
PCB
2 Check the connections of
the connector between the
high-voltage power supply
and the main PCB are
secured correctly?
No Reconnect the connector
between the high-voltage power
supply and the main PCB.
(6) Fixing heater temperature failure
Possible cause
Step
Check
Result
Remedy
1 Is the contact of connector
CN1 and CN2 on the relay
rear PCB good?
No Reconnect the connector.
Poor
thermistor
harness
contact
2 Is the contact of connector
CN3 on the main PCB
good?
No Reconnect the connector.
Blown
thermostat
3 Remove the fuser unit and
measure the resistance of
the thermostat. Is it open
circuit?
Yes Replace the fuser unit.
Halogen
heater lamp
failure
4 Remove the fuser unit and
measure the resistance of
the halogen heater lamp. Is
it open circuit?
Yes Replace the fuser unit.
(7) Laser Unit failure
Possible cause
Step
Check
Result
Remedy
No Reconnect the connector
securely.
Harness
connection
failure (1)
1 Is connector CN18 on the
main PCB secured
correctly?
Yes Replace the laser unit.
No Reconnect the connector
securely.
Harness
connection
failure (2)
2 Is the connection of the
scanner motor connector
CN10 on the main PCB
secure?
Yes Replace the laser unit.