Brother DCP-L8400CDN Service Manual page 89

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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
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Error code 6F00
Print Unable ZC
Turn the power off and then back on again.
Machine detected that supplied power was unstable. (Less than 100 times)
< User Check >
- Turn the power switch OFF/ON.
- Insert the filter into the power supply.
Step
The power supply waveform is
1
incorrect
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Error code 7000
Jam Inside
Open the Front Cover, pull out all four drum and toner cartridge assemblies
and remove the jammed paper.
After the registration rear sensor detects paper pass, the eject sensor does not detect paper
pass.
< User Check >
- Remove the jammed paper.
Step
1 Foreign object inside machine
2 Eject actuator that has come off
or that has been caught
3 Fuser cover installation failure
4 Connection failure of the eject
sensor PCB harness
5 Fuser drive gear Z25 damaged
6 Process related feed gear
damaged
7 Paper feed related gear
damaged
8 Eject sensor failure
9 Fuser unit failure
10 Main PCB failure
Cause
Reconnect the develop release sensor
harness.
Replace the develop release sensor PCB
ASSY.
Replace the develop release drive unit.
Replace the main PCB ASSY.
Cause
Install a voltage stabilizer in the power
supply part.
Cause
Remove the foreign object.
Re-assemble the eject actuator.
Re-assemble the fuser cover.
Reconnect the eject sensor PCB harness.
Replace the fuser drive gear Z25.
Replace the process drive unit.
Replace the main drive unit.
Replace the eject sensor PCB ASSY.
Replace the fuser unit.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
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