Brother HL-L9300CDW Service Manual page 89

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Error code 8903
2-sided Disabled
Close the Back Cover of the machine.
The back cover sensor detected the open state when 2-sided printing is started.
(before the registration of printing in the engine)
Error code 8904
2-sided Disabled
Close the Back Cover of the machine.
The back cover sensor detected the open state during 2-sided printing.
(after the registration of printing in the engine)
< User Check >
- Close the back cover.
Step
1 Connection failure of the back
cover sensor harness
2 Back cover sensor installation
failure
3 Breakage of boss that presses
the back cover sensor
4 Back cover sensor failure
5 Main PCB failure
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Error code 8A01
Size Error DX
Specify the correct paper and press Go.
The registration rear sensor detected that the fed paper was larger or smaller than the
specified size in 2-sided printing.
Error code 8A02
2-sided Disabled
Load #S paper and press Go.
The registration rear sensor detected that the length of the paper is too long and it may hit
within the machine in 2-sided printing.
< User Check >
- Use the Letter to Legal size paper.
Step
1 Registration rear actuator
caught on some position
2 Registration rear sensor failure
3 Main PCB failure
Cause
Cause
2-69
Remedy
Reconnect the back cover sensor
harness.
Re-assemble the back cover sensor.
Replace the back cover.
Replace the back cover sensor.
Replace the main PCB ASSY.
Remedy
Re-assemble the registration rear
actuator.
Replace the registration front/rear sensor
PCB ASSY.
Replace the main PCB ASSY.
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