The Touch Panel Does Not Work - Brother NV4000D Service Manual

Failure Investigation for Electronic Parts The touch panel does not work

The touch panel does not work.

Is the touch panel tuned correctly?
Is the touch panel's FFC properly
connected to connector CN16 on
the panel PCB?
Is the resistance between pins 2 and
4, and 1 and 3 of the touch panel 85
- 350W, 500 - 2050Ω, respectively?
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.
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