Brother HL1060 - B/W Laser Printer Service Manual page 76

I-11 Poor fixing
Possible cause Step
Printing paper
Toner sensing
failure
Thermistor
failure
Low-voltage
power supply
PCB failure
I-12 Image distortion
Possible cause Step
Scanner
Scanner LD
emission failure
Scanner motor
rotation failure
Scanner
connection
failure
Check
1 Is thick paper more than 36lb
weight in use?
2 Is the problem solved by
replacing the drum unit or the
toner cartridge?
(When printing is faint.)
3 Is the thermistor fitted
correctly?
4 Is the problem solved by
replacing the low-voltage power
supply PCB?
Check
1 Is the scanner unit secured to
the frame incorrectly?
Is there any play?
2 Is the laser diode or the laser
scanner motor defective?
3 Is the scanner harness
connected properly?
Is it coming loose?
CHAPTER IV -12
Result Remedy
Yes Instruct the user to use paper of
the recommended weight and
thickness.
Yes Toner is empty.
The toner sensing is defective,
clean the toner sensor.
If the wiper in the toner
cartridge is broken, replace the
toner cartridge with a new one.
No Fit the thermistor correctly.
Yes Replace the low-voltage power
supply PCB.
Result Remedy
Yes Secure the unit correctly and
tighten the screws.
Yes Replace the scanner unit.
Yes Connect the harness correctly.