Brother DCP-9055CDN Service Manual page 77

■ Error code 20 (K)
Print Unable 20
Turn the power off and then back on again.
Error code 21 (Y)
Print Unable 21
Turn the power off and then back on again.
Error code 22 (M)
Print Unable 22
Turn the power off and then back on again.
Error code 23 (C)
Print Unable 23
Turn the power off and then back on again.
Laser diode error.
This error does not usually occur in the normal use. The conceivable causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
<User Check>
- Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
Error code 24
Print Unable 24
Turn the power off and then back on again.
Internal temperature sensor error.
Step
1 Harness connection failure of
internal temperature sensor
2 Internal temperature sensor
failure
3 Main PCB failure
Cause
Cause
2-39
Remedy
Replace the main PCB ASSY.
Remedy
Check the harness connection of internal
temperature and reconnect it.
Replace the internal temperature sensor.
Replace the main PCB ASSY.
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