Brother PR655 - The Touch Panel Does Not Work

Failure Investigation for Electronic Parts
Failure Investigation
for Electronic Parts
Failure Investigation
for Electronic Parts
5 - 6
The touch panel does not work.
Touch panel
Panel PCB
1
4
Connector CN7
FPC
Pin 1
Pin 4
The touch panel does not work.
Adjust it correctly.
N
Y
Connect it properly.
Is the touch panel's FPC properly
connected to connector CN7 on the
panel PCB?
N
Y
Change the touch panel and
adjust it again.
Is the resistance between pins 2 and 4,
and 1 and 3 of the touch panel's FPC
503 - 1174Ω, 195 - 454Ω, respectively?
N
Y
Is the touch panel adjusted correctly?
Change the panel PCB and
adjust the touch panel again.