Brother HL-2030 - Page 186

CHAPTER 7 TROUBLESHOOTING
Confidential
7-22
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 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.
M-6 Fixing heater temperature failure
Possible cause Step Check Result Remedy
Poor thermistor
harness contact
1 Is the contact of connector
CN7 on the main PCB good?
No Reconnect the connector.
Blown thermal
fuse
2 Remove the fixing unit and
measure the resistance of the
thermal fuse. Is it open circuit?
Yes Replace the fixing unit.
Blown
thermostat
3 Remove the fixing unit and
measure the resistance of the
thermostat. Is it open circuit?
Yes Replace the fixing unit.
Halogen heater
lamp failure
4 Remove the fixing unit and
measure the resistance of the
halogen heater lamp. Is it
open circuit?
Yes Replace the halogen heater
lamp.
M-7 Laser Unit failure
Possible cause Step Check Result Remedy
No Reconnect the connector
securely.
Harness
connection
failure (1)
1 Is connector CN3 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 CN6
on the main PCB secure?
Yes Replace the laser unit.