7.3. Power Circuit and Redial Back-up Circuit
Function:
This set is powered from the line. When it is an OFF-HOOK status, Tel Line
→
D17
→
Q1
→
R9
→
Pin 27 of IC1 (to become
the power supply for IC1 speech network).
The voltage from the line is turned into a constant voltage by D2 and then supplied to the IC1, reset circuit.
Through Tel Line
→
R1
→
R3
→
D17
→
R14 to become the power supply for IC1, and the redial Back-up will be done.
14
KX-TS2350CAB / KX-TS2350CAC / KX-TS2350CAH / KX-TS2350CAR / KX-TS2350CAW
