Brother HL-4040CN Service Manual page 30

Error code 2C(K)
Print Unable 2C
Turn the power off and then back on again.
Error code 2D(Y)
Print Unable 2D
Turn the power off and then back on again.
Error code 2E(M)
Print Unable 2E
Turn the power off and then back on again.
Error code 2F(C)
Print Unable 2F
Turn the power off and then back on again.
Toner sensor PCB failure for the appropriate color
Step
1 Toner sensor PCB (TE/NEW)
failure
2 Engine PCB failure
Error code 30
Print Unable 30
Turn the power off and then back on again.
Incorrect EL lamp current value
User Check
- Replace the drum unit with a new one.
Step
1 Drum unit electrode dirty
Cause
Check the sensor performance following the
procedure described in
any problem occurs, replace the toner sensor PCB
ASSY (TE/NEW) for the appropriate color.
Replace the engine PCB ASSY.
Cause
Clean the electrodes on the drum unit. (Refer to
Fig.1-2 (P
1-13
Remedy
"Maintenance mode
Remedy
1-35).)
32". If
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