Panasonic KX-F900 Service Manual page 59

KX-F900
(3) OSCILLATOR (CLK)
SYSTEM CLK: 24 MHz, MODEM CLK: 24 MHz
24 MHz SYSTEM CLK
(pin 96 of ASIC:IC1) 5V
• This point is 1/2the MHz of the
SYSTEM CLK 12MHz. 0V
50 nsec/div
24 MHz MODEM CLK
(pin 70 of MODEM:IC11) 5V
• This point is 1/2the MHz of the
MODEM CLK 12MHz. 0V
50 nsec/div
(4) RESET
RESET signal makes system initial state just after power on.
If RESET signal is defect, please check IC11 and components that is connected to these ICs.
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Check _ voltage 5v?
power line 5V pow_n_J
RE-CET
(pin 101of ICl : ASIC)
reset time apx. 175msec
4.3msec
5v
NG 0v
NG
This wave form means another problem, it is not caused by RESET circuit
Please see the item : "CHECK WAVE FORM"
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