Brother DCP-9010CN Service Manual page 107

■ Error code 20 (K), 21 (Y), 22 (M), 23 (C)
Print Unable 20
Turn the power off and then back on again.
Print Unable 21
Turn the power off and then back on again.
Print Unable 22
Turn the power off and then back on again.
Print Unable 23
Turn the power off and then back on again.
LED ASSY error (EEPROM access error of the LED head)
Step
1 FFC connection failure of each
LED ASSY
2 LED head control PCB failure
3 Failure of each LED ASSY
4 Main PCB failure
5 Low-voltage power supply PCB
failure
■ Error code 24
Print Unable 24
Turn the power off and then back on again.
Internal temperature sensor error
Step
1 Internal temperature sensor
failure
2 Engine PCB failure
3 Main PCB failure
Cause
Cause
3-15
Remedy
Check the FFC connection of the
appropriate color and reconnect it.
Replace the LED head control PCB ASSY.
Replace the LED ASSY of the appropriate
color.
Replace the main PCB ASSY.
Replace the low-voltage power supply
PCB ASSY.
Remedy
Replace the drum motor origin sensor
PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
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