Cannot Sew Pattern Well - Brother NV-10A Service Manual

Failure Investigation for Electronic Parts Cannot sew pattern well
Normal pattern is not generated
With the power OFF, can you lightly
move the needle bar left and right by
hand?
Is the resistance between pins 1 & 2
and pins 3 & 4 on the Z pulse motor
and the F pulse motor connectors 6.7 –
7.7 Ω ?
Is the connector of the Z pulse motor
correctly connected to CN8 of the
main PCB assy.?
Is the connector of the F pulse motor
correctly connected to CN10 of the
main PCB assy.?
Y
Y
Y
Replace the main PCB assy.
N
Adjust the attachment of the
needle-presser module
N
Replace the pulse motor
N
Reconnect it correctly
N
Reconnect it correctly
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