Brother PR655 - Page 283

Failure Investigation for Electronic Parts
Failure Investigation
for Electronic Parts
Failure Investigation
for Electronic Parts
5 - 28
Error message
• Main motor encoder signal error
• Main motor encoder connect error
(Dialog message)
Change the main shaft encoder.
N
Y
Connect it properly.
Is the main shaft sensor's lead
properly connected to CN19 on the
main PCB?
N
Y
Change the main PCB.
Does the machine function normally
when the main shaft sensor PCB is
replaced with a reliable one?
N
Y
Is the main shaft encoder deformed,
bent, or damaged due to contact?
Change the main shaft
sensor PCB.