Brother HL-L8250CDN Service Manual page 74

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Error code 4F01
Cartridge Error
Put the Black (BK) Toner Cartridge back in.
The new toner sensor of the toner cartridge (Black) could not detect a new cartridge properly.
Error code 4F02
Cartridge Error
Put the Yellow (Y) Toner Cartridge back in.
The new toner sensor of the toner cartridge (Yellow) could not detect a new cartridge properly.
Error code 4F03
Cartridge Error
Put the Magenta (M) Toner Cartridge back in.
The new toner sensor of the toner cartridge (Magenta) could not detect a new cartridge
properly.
Error code 4F04
Cartridge Error
Put the Cyan (C) Toner Cartridge back in.
The new toner sensor of the toner cartridge (Cyan) could not detect a new cartridge properly.
< User Check >
- Replace the toner cartridge with a new toner cartridge again.
- If the place where the machine is installed is not flat, relocate the machine to a flat place.
Step
1 Connection failure of the new
toner sensor PCB harness
2 New toner actuator that has
come off or that has been caught
3 New toner sensor failure
4 Main PCB failure if the error code
remains after replacing with a
new toner cartridge and
performing the Toner manual
reset
Cause
2-51
Remedy
Reconnect the toner/new sensor PCB
harness.
Re-assemble the new toner actuator.
Replace the toner/new sensor PCB ASSY.
Replace the main PCB ASSY.
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