Brother PR600II Service Manual page 307

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Failure Investigation for Electronic Parts Error message
• Main motor encoder signal error
• Main motor encoder connect error
(Dialog message)
Is the main shaft encoder deformed,
bent, or damaged due to contact?
Is the main shaft sensor's lead
properly connected to CN17 on the
main PCB?
Does the machine function normally when the main
shaft sensor PCB is replaced with a reliable one?
Change main shaft sensor PCB.
Y
Y
Y
N
Change main shaft encoder.
N
Change Y area sensor PCB.
N
Change main PCB.
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