Brother HL 2060 - B/W Laser Printer Service Manual page 99

M-13 "50 FUSER MALF" is displayed
Possible cause Step
Thermal fuse 1
Thermistor 2
Fixing heat roller 3
Low-voltage 4
power supply
PCB
Main PCB 5
Note: When the printer has detected a fixing unit malfunction, do not power on for
about 15 minutes.
Even if the power is on, the printer will shut off the power supply to the fixing
heat roller to prevent the fixing the unit from overheating.
M-14 "51 LASER BD MALF" is displayed
Possible cause Step
Main PCB 1
Laser unit
harness
M-15 "52 SCANNER MALF" is displayed
Possible cause Step
Main PCB 1
Laser unit
harness
Laser unit
Check
Is the thermal fuse located in the fixing unit
conductive ?
Remove the fixing unit from the printer and
measure the resistance between two pins of
the 2 pin connector on the fixing PCB. Is the
measured resistance within the range of
1.0 M - 1.6M (normal temperature)?
Is the fixing heat roller located in the fixing unit
conductive ?
When the power is switched on, does the
voltage at connector pin P4-1 on the main PCB
go from 5V to 0V?
Make sure if:
The EP-ED HC cartridge is installed in the
printer correctly.
The upper cover of the printer is closed.
A paper-loaded cassette is mounted.
Check
Is the problem remedied when the power off
and on again?
Check
Is the problem remedied when the power off
and on again?
VI-16
Result Remedy
No Replace the fixing unit.
No Replace the fixing unit.
No Replace the fixing heat
roller.
Yes Replace the low-voltage
power supply PCB assy.
No Replace the main PCB
assy.
Result Remedy
No Replace the main PCB
assy , the LSR harness
14P, LSR flat cable 6P or
the laser unit.
Result Remedy
No Replace the main PCB
assy, the LSR harness
14P, LSR flat cable 6P or
the laser unit.