Brother PR600II Service Manual page 309

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Failure Investigation for Electronic Parts Error message
• Sewing data error
• Panel communication error
• Communication timeout error
• Data receiving command error
• Communication error
(Dialog message)
Does not the encoder have the dirt,
or damaged due to contact.
TEST MODE
Does the "ENCODER A-B" within the
(SENSOR TEST) change from "H" to "L" to "H".
Are relay connectors for leads A and B on
the panel properly connected to each other?
Is lead B on the panel properly connected
to connector CN10 on the main PCB?
Is lead A on the panel properly connected
to connector CN9 on the panel PCB?
Is the resistance between each pin at both ends
1Ω or below when leads A and B on the panel are
removed from the main PCB and the panel PCB?
Does the machine function normally when the
panel PCB is replaced with a reliable one?
N
Y
Y
Y
Y
Y
Y
Change panel PCB.
Y
Change encoder or
wipe off the dirt.
N
Change encoder.
N
Connect them properly.
N
Connect it properly.
N
Connect it properly.
N
Change leads A and B on the panel.
N
Change main PCB.
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