Brother PR600 - The Touch Panel Does Not Work

5 - 6
Failure Investigation for Electronic Parts The touch panel does not work.
The touch panel does not work.
Connect it properly.
N
Y
Connect it properly.
Is the touch panel's FFC properly
connected to connector CN3 on the
panel PCB?
N
Y
Change touch panel and
tune it again.
Is the resistance between pins 2 and
4, and 1 and 3 of the touch panel 490
- 2050Ω, 110 - 670Ω, respectively?
N
Y
Is the touch panel tuned correctly?
Change panel PCB and tune
the touch panel again.