Question about Brother MFC-8440 All-In-One Laser Printer
Try lubricating the mirror shaft, however, the ones i've fixed all had a bad circuit board.
Posted on Jan 16, 2009
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May 16, 2012 | Brother MFC-8440 All-In-One Laser Printer
L6 10 Content Polygon motor lock trouble
Details The polygon motor does not rotate.
The motor lock signal is detected for 6sec
or more after the polygon motor rotates.
The motor lock signal is detected for 1sec
during rotation of the polygon motor.
Cause Polygon motor unit failure
Polygon motor connection harness trouble
MCU PWB failure
Check the polygon motor operation with
Check connector/harness of polygon
Replace the polygon motor.
Replace the MCU PWB.
If the polygon motor isn't working then you will neeto buy a new Laser Unit. They can be expensive if you can get one. To replace it will tak alot of disassembly as well. Might be better and more cost effective to get a new machine.
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