Brother MFC640CW Service Manual page 251

[ 4 ] Auto document feeder (ADF) malfunction .............................................. 9-39
9.2.6 Possible component defects and resulting problems ...................................... 9-41
[ 1 ] ADF mechanism .................................................................................. 9-41
[ 2 ] Scanner mechanism............................................................................. 9-42
[ 3 ] Head/carriage unit drive and purge mechanisms..................................... 9-43
[ 4 ] Print head mechanism.......................................................................... 9-44
[ 5 ] ASF mechanism .................................................................................. 9-45
[ 6 ] Paper feeding mechanism .................................................................... 9-45
[ 7 ] Speaker.............................................................................................. 9-45
[ 8 ] Control panel....................................................................................... 9-46
[ 9 ] PCBs.................................................................................................. 9-46
[ 10 ] Adjustments/data in the memories ........................................................ 9-47
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