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Failure Investigation
for Electronic Parts
Failure Investigation for Electronic Parts
Needle bar cutting and separating does not occur normally.
Needle bar cutting and separating
does not occur normally
Adjust the needle-presser
module assembly
Is the needle bar cutting and
separating operation easy and
smooth?
N
Replace the Z pulse motor
Is the resistance across pins 1-2
and pins 3-4 for the Z pulse motor
connector 4-6 Ω?
N
Y
Y
Replace main PCB assy.
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