Brother HL-L9300CDW Service Manual page 81

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Error code 6C03
Tray 3 Error
Take out Tray 3 and push it back in firmly.
After the T3 paper tray unit is opened and closed or the power is turned ON, the T3 plate origin
sensor detects that lift-up of the plate of the T3 paper tray unit is not completed within the
specified period of time.
< User Check >
- Open the T3 paper tray unit and close the T3 paper tray unit correctly.
Step
1 Connection failure of the T3 plate
origin sensor harness
2 T2 relay PCB failure
3 T3 relay PCB failure
4 T3 plate origin sensor failure
5 Main PCB failure
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Error code 6D00
Too Many Trays
Turn the power off and remove additional trays.
The number of option trays higher than the specified one is connected.
< User Check >
- Reduce the option trays to the specified number.
Step
1 LT paper tray unit failure
2 Main PCB failure
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Error code 6E00
Toner Error
One or more Toner Cartridges are not detected. Pull out and reinsert all 4
Toner Cartridges.
The develop release sensor detected the developer roller disengagement or engagement failure.
Step
1 Connection failure of the develop
release sensor harness
2 Develop release sensor failure
3 Develop release clutch failure
4 Main PCB failure
Cause
Cause
Cause
2-61
Remedy
Reconnect the T3 plate origin sensor
harness.
Replace the T2 relay PCB ASSY.
Replace the T3 relay PCB ASSY.
Replace the T3 paper tray unit.
Replace the main PCB ASSY.
Remedy
Replace the LT paper tray unit.
Replace the main PCB ASSY.
Remedy
Reconnect the develop release sensor
harness.
Replace the develop release sensor PCB
ASSY.
Replace the develop release drive unit.
Replace the main PCB ASSY.
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