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i
KX-F1200
Note 3) Check clock pulse
i
Is the voltage at pins 72,22, of 1(3405 4-5 V? I
!
YES
NO
Is the frequency at pin 68 of IC405 24 MHz?
I
3-4 Vp-p
NO
Replace R593 or
C526,LC502,C434,R635.
YES
Is the frequency at pin 81 of
IC404 12 MHz?
ZIj I v°°
NO
YES
Check the frequency at
pin 68 of IC405 again.
J
OK
I
Replace IC405.
Is the frequency at pin 28 of
IC401 16 MHz?
YES
Check the frequency at pin 56 of IC404
3-5 V. T
24 MHz
_L
I OK
I
I
NO
NG
l
I Replace IC404.
END
Replace R748, R747,
X404, C751, C752,
IC404.
-39-
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