The Touch Panel Does Not Work - Brother PR600II Service Manual

Failure Investigation for Electronic Parts The touch panel does not work.
Is the touch panel tuned correctly?
Is the touch panel's FFC properly
connected to connector CN1 on the
panel PCB?
Is the resistance between pins 2 and
4, and 1 and 3 of the touch panel 90 -
650Ω, 500 - 2000Ω, respectively?
5 - 6

The touch panel does not work.

Y
Y
Y
Change panel PCB and tune
the touch panel again.
N
Connect it properly.
N
Connect it properly.
N
Change touch panel and
tune it again.