Brother HL-3040CN Service Manual page 83

■ Error code 36
Print Unable 36
Turn the power off and then back on again.
Error occurs while the high-voltage power supply PCB is in ready state.
Error code 40
Print Unable 40
Turn the power off and then back on again.
Error occurs while the high-voltage power supply PCB is in operation
* After the error code 36 is displayed for 5 seconds, the power of the main unit is forcibly
turned off, and it takes 10 minutes to recover.
< >
User Check
- Clean the corona wire in the drum unit.
- Replace the drum unit with a new one.
Step
1 Dirt on drum unit
electrodes
2 Harness connection failure of
high-voltage power supply PCB
ASSY
3 HVPS control PCB failure
4 High-voltage power supply PCB
failure
5 Engine PCB failure
6 Main PCB failure
■ Error code 37
Print Unable 37
Turn the power off and then back on again.
Belt thermistor error
Step
1 Harness connection failure of
belt thermistor ASSY
2 Main PCB failure
Cause
Cause
3-19
Remedy
Clean the electrodes of the drum unit and
main body. (Refer to Fig. 3-3 (P3-32)
Fig. 3-6 (P3-33))
Check the harness connection between
the high-voltage power supply PCB ASSY
and engine PCB ASSY, and the one
between the high-voltage power supply
PCB ASSY and main PCB ASSY. Then,
reconnect them.
Replace the HVPS control PCB ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the belt
thermistor ASSY.
Replace the main PCB ASSY.
and
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