Brother MFC-9320CW Service Manual page 102

■ Error code 42
Print Unable 42
Turn the power off and then back on again.
HVPS control PCB transfer error
Step
1 Harness connection failure of
high-voltage power supply PCB
ASSY
2 Harness connection failure of
HVPS control PCB ASSY
3 HVPS control PCB failure
4 High-voltage power supply PCB
failure
5 Main PCB failure
■ Error code 43
Print Unable 43
Turn the power off and then back on again.
Main/Engine ASIC transfer error
Step
1 Harness connection failure
between the main PCB ASSY
and engine PCB ASSY
2 Engine PCB failure
3 Main PCB failure
Cause
Cause
3-21
Remedy
Check the harness connection between
the high-voltage power supply PCB ASSY
and HVPS control PCB ASSY, and
reconnect it.
Check the harness connection between
the HVPS control PCB ASSY and main
PCB ASSY, and reconnect it.
Replace the HVPS control PCB ASSY.
Replace the high-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection between
the main PCB ASSY and engine PCB
ASSY, and reconnect it.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
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