Essilor Instruments APH 550

30
5-17 Touch panel does not work
Main causes in case that touch panel does not work:
・Calibration of touch panel is misaligned
・Failure of control board assy
・Failure of LCD panel assy
Replace the LCD panel assy.
The touch panel does not work.
OK
Is the performance of
the touch panel normal?
Does it work when operating it with the
operation switches or the dial switch etc.?
YES
NO
Replace the control
board assy.
NO
YES
Calibrate the touch panel.
【Refer to 7-3.】
Is the performance of
the touch panel normal?
YES
NO