Brother PR600 - The Hoop Sensor Does Not Function Normally

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Failure Investigation for Electronic Parts The hoop sensor does not function normally.
The hoop sensor does not function
normally.
Connect it properly.
N
Y
Is the hoop sensor tuned correctly?
Connect it properly.
N
Y
Is the FFC (SML2CD-X) properly connected
to CN1 on the hoop sensor PCB and CN2
on the X area sensor PCB? Is the
orientation of the FFC (SML2CD-X) correct?
Connect it properly.
N
Is the FFC (SML2CD-C) properly connected
to CN1 on the X area sensor PCB and CN4
on the connect PCB? Is the orientation of
the FFC (SML2CD-C) correct?
Y
Connect it properly.
N
Is the FFC (SML2CD-Y) properly connected
to CN1 on the Y area sensor PCB and CN2
on the connect PCB? Is the orientation of
the FFC (SML2CD-Y) correct?
Y
Connect it properly.
N
Is the Y area sensor's lead properly
connected to CN19 on the main
PCB?
Y
Change FFC (SML2CD-X).
N
Is the resistance between each terminal at
both ends 1Ω or below when both ends of the
FFC (SML2CD-X) are removed from the PCB?
Y
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