Brother 09055CDN Service Manual page 98

■ Error code 71
Print Unable 71
Turn the power off and then back on again.
Laser unit polygon motor error.
Error code 72
Print Unable 72
Turn the power off and then back on again.
Beam detecting sensor (Black/Yellow) error of the laser unit.
Error code 73
Print Unable 73
Turn the power off and then back on again.
Beam detecting sensor (Cyan/Magenta) error of the laser unit.
<User Check>
- Open the front and rear covers and leave them for 30 minutes or more with the power ON.
After that, close the front and rear covers and turn OFF and ON the power switch.
Step
1 Harness connection failure of
laser unit
2 Laser unit failure
3 Engine PCB failure
4 Main PCB failure
■ Error code 74
(This error can be found out only in
Replace Toner
Open the Front Cover, replace Toner Cartridge.
The color toner reached the end of life during printing.
<User Check>
- Replace the toner cartridge which reached the end of life with a new one.
Step
1 Toner/New sensor PCB failure
(Toner empty)
2 Engine PCB failure
3 Main PCB failure
Cause
Cause
2-59
Remedy
Check the harness connections (at three
locations) of the laser unit and reconnect
them.
Replace the laser unit.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
"Function code 82".)
Remedy
Check the sensor performance following
the procedure described in
32". If any problem occurs, replace the
Toner/New sensor PCB ASSY.
Replace the engine PCB ASSY.
Replace the main PCB ASSY.
"Function code
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