Panasonic KX-F680BX - Page 51

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KX-F680BX/KX-F2681BX
plug the AC cord
Look at LCD
No reaction
No reaction means that Power line is
broken (short-circuit).
Check
power line
(Refer to page 58)
Turn over and take
bottom cover off.
RESET volatge
not 5V
5V
Check the voltge of
testing points.
(Refer to next page)
Check detail.
(Refer to page 58)
Is pin 101 of ASIC 5V?
like a wave form below
RESET is fixed at 5V
BE CAREFUL!
This is the TEST with AC power on.
LCD
LCD
Black squares or any charactor come.
Power ON
Oscilloscope
GND
AC
(3) PROCEDURE FROM OUR EXPERIENCE TO FIX