Brother HL-4140CN Service Manual page 89

■ Error code 87
Calibrate
Calibration failed. Insufficient Toner for Calibration.
Toner of the color which is being used reaches the end of life when implementing adjustment
of color density.
<User Check>
- Replace the toner cartridge with a new one.
Step
1 Toner/New sensor PCB failure
(Toner empty)
2 Engine PCB failure
3 Main PCB failure
■ Error code 88
Jam Inside
Open the Front Cover, pull out the Drum Unit completely and remove the
jammed paper.
Paper jam inside the printer.
<User Check>
- Check if the paper is jammed. If jammed, remove it.
Step
1 Harness connection failure of
paper eject sensor PCB ASSY
2 Paper eject actuator catching on
some position
3 Paper eject sensor PCB ASSY
failure
4 Engine PCB failure
5 Main PCB failure
Cause
Cause
2-58
Remedy
Check the sensor performance following
the procedure described in
32". If any problem occurs, replace the
Toner/New sensor PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Remedy
Check the harness connection of the
paper eject sensor PCB ASSY and
reconnect it.
Correct catching of the paper eject
actuator.
Check the sensor performance following
the procedure described in
32". If any problem occurs, replace the
paper eject sensor PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
"Function code
"Function code
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