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Brother HL-4570CDW - Page 65

Brother HL-4570CDW
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2-34
Confidential
Error code 36
Error in the high-voltage power supply PCB while the printer is in the standby mode.
Error code 37
Belt unit temperature sensor error.
Error code 38
External temperature sensor error.
Error code 39
External humidity sensor error.
Print Unable 36
Turn the power off and then back on again.
Step Cause Remedy
1 Harness connection failure of
high-voltage power supply PCB
Check the harness connection of the
high-voltage power supply PCB ASSY
and reconnect it.
2 High-voltage power supply PCB
failure
Replace the high-voltage power supply
PCB ASSY.
3 Engine PCB failure Replace the engine PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Print Unable 37
Turn the power off and then back on again.
Step Cause Remedy
1 Harness connection failure of
belt unit temperature sensor
Check the harness connection of the belt
unit temperature sensor and reconnect it.
2 Belt unit temperature sensor
failure
Replace the registration mark sensor
holder ASSY.
3 Main PCB failure Replace the main PCB ASSY.
Print Unable 38
Turn the power off and then back on again.
Print Unable 39
Turn the power off and then back on again.
Step Cause Remedy
1 External temperature/humidity
sensor failure
Replace the high-voltage power supply
PCB ASSY.
2 High-voltage power supply PCB
failure
Replace the high-voltage power supply
PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.

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