Brother XR9000 Service Manual page 142

Computerized sewing machine with low-end computer 3 series
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Failure Investigation
for Electronic Parts
Is the main PCB assy. attached
correctly?
Is the timing shutter of the upper
shaft dirty?
Replace the main PCB assy.
Error is displayed
"F5" is displayed.
Y
Y
N
Reassemble the main PCB assy.
N
Clean the dirty of the timing
shutter.
5 - 19

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