Brother DCP-L8400CDN, Service Manual

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Confidential
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Error code 6A00
Electric discharge that may be caused by dirt on the corona wire of the drum unit was detected.
Error code 6B01
Electric discharge was detected when the number of the drum unit rotations had become more
than twice of the upper limit.
< User Check >
- Clean the corona wire by sliding the blue tab of the drum unit for all four colors several times.
- Clean the terminal of the drum unit. (Refer to Fig. 2-8 (P2-55) .)
- Replace the drum unit.
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Error code 6C02
After the T2 paper tray unit is opened and closed or the power is turned ON, the T2 plate origin
sensor detects that lift-up of the plate of the T2 paper tray unit is not completed within the
specified period of time.
< User Check >
- Open the T2 paper tray unit and close the T2 paper tray unit correctly.
Drum !
Slide the Blue tab on Drum Unit.
Drum Stop
Replace the Drum Unit.
Step Cause Remedy
1 Dirt on the GRID terminals of the
main body Clean the GRID terminals of the main
body.
(Refer to Fig. 2-7 (P2-55) .)
2 Dirt on the terminal of the
high-voltage power supply PCB Clean the terminal of the high-voltage
power supply PCB.
3 High-voltage power supply PCB
failure Replace the high-voltage power supply
PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
Tray 2 Error
Take out Tray 2 and push it back in firmly.
Step Cause Remedy
1 Connection failure of the T2 plate
origin sensor harness
Reconnect the T2 plate origin sensor
harness.
2 T2 relay PCB failure Replace the T2 relay PCB ASSY.
3 T2 plate origin sensor failure Replace the T2 paper tray unit.
4 Main PCB failure Replace the main PCB ASSY.