Brother HL-4140CN Service Manual page 55

■ Error code 19
Replace Drum
Open the Front Cover, replace the Drum Unit. Refer to the User's Guide for
instructions.
The drum unit reached the end of life.
<User Check>
- Replace the drum unit and reset the counter.
(Refer to "2.3 Parts Life Reset Function" in Chapter
Step
1 Main PCB failure
■ Error code 1A
Condensation
Leave switched ON. Fully open the front cover. Wait 30 minutes, switch OFF
and close cover, then switch ON.
Condensation occurred on the laser unit.
<User Check>
- Open the front and back covers and leave them for 30 minutes or more with the power ON.
After that, close the front and back covers and turn OFF and ON the power switch.
Step
1 Engine PCB failure
2 Main PCB failure
3 Laser unit failure
Cause
Cause
2-24
5.)
Remedy
Replace the main PCB ASSY.
Remedy
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
Replace the laser unit.
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