Panasonic KX-TD7685 Service Manual page 10

KX-TD7685
4.2.9. Ringer Circuit
During ringing, a signal is sent from pin 10 and pin 11 of IC301 to a monitor speaker through speaker Amplifier IC (IC401). At this
time, BBIC (IC201) makes pin 1 of IC401 from low to high.
4.2.10. Key Click Sound Circuit
When the key is pushed, a signal is sent from pin 45 of IC201 to a monitor speaker through speaker Amplifier IC (IC401). At this
time, BBIC (IC201) makes pin 1 of IC401 from low to high.
4.2.11. Vibrator Circuit
BBIC (IC201) controls Vibrator through MIDI (IC301).
Pin 37 (VIB) of IC301 goes low and Vibrator turns ON.
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