Pattern Cannot Be Sewn Correctly - Brother CE-5500PRW Service Manual

Failure Investigation
for Electronic Parts

Pattern cannot be sewn correctly.

With the power OFF, can you move the
needle bar to the left and right by hand
lightly?
Is the resistance between pin 1 and
2, 3 and 4 on the Z and F pulse
motor connector 6.7-7.7Ω?
Is the Z pulse motor connector
connected to the main PCB assy.
(CN8) correctly?
Is the F pulse motor connector
connected to the main PCB assy.
(CN10) correctly?
Is the main PCB assy. attached
correctly?
(Is the BW switch OFF?)
Replace the main PCB assy.
Pattern cannot be sewn correctly
Y
Y
Y
Y
N
Attach the needle-presser
module correctly.
N
Replace the pulse motor.
N
Connect it correctly.
N
Attach the main PCB assy.
correctly.
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