Brother DCP-9055CDN Service Manual page 89

■ Error code 50
Replace Parts
Drum Unit
Drum unit is at the end of life.
Error code 51
Replace Parts
PF Kit MP
MP paper feeding kit is at the end of life.
Error code 52
Replace Parts
PF Kit 1
Paper feeding kit1 is at the end of life.
Error code 53
Replace Parts
PF Kit 2
Paper feeding kit2 is at the end of life.
Error code 54
Replace Parts
Fuser Unit
Fuser unit is at the end of life.
Error code 55
Replace Parts
Laser Unit
Laser unit is at the end of life.
Step
1 The part displayed on the LCD
reached the end of life
2 Main PCB failure
Cause
2-51
Remedy
Replace the part displayed on the LCD
and reset the counter of each part.
(Refer to "2.2 Parts Life Reset Function" in
Chapter 5.)
Replace the main PCB ASSY.
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