Brother HL-L8250CDN Service Manual page 87

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Error code 8501
No Tray
Reinstall tray 1
The T1 paper feed sensor detected that the paper tray 1 is open in 2-sided printing or printing
by feeding paper from the T2 paper tray unit. (before the registration of printing in the engine)
Error code 8505
No Tray
Reinstall tray 1
The T1 paper feed sensor detected that the paper tray 1 is open in 2-sided printing or printing
by feeding paper from the T2 paper tray unit. (after the registration of printing in the engine)
< User Check >
- Check if the paper tray 1 is closed correctly.
Step
1 T1 paper feed actuator that has
come off or that has been caught
2 Connection failure of the T1
paper feed sensor PCB harness
3 T1 paper feed sensor failure
4 Main PCB failure
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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
Cause
Cause
2-64
Remedy
Re-assemble the T1 paper feed actuator.
Reconnect the T1 paper feed sensor PCB
harness.
Replace the T1 paper feed sensor PCB
ASSY.
Replace the main PCB ASSY.
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.
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