Read Panasonic KX-TS2361CAW Service Manual online
9
KX-TS2361CAW
4.2.4.
Power Circuit and Redial Back-up Circuit
4.2.4.1.
Function
This set is powered from the line. When it is an OFF-HOOK status, Tel Line
D1 Q1 R14 pin 17 of IC1 (to become the
power supply for IC1 speech network).
The voltage from the line is turned into a constant voltage by D6 and then supplied to the IC1 and sending and receiving circuit
of the set.
At ON-HOOK status the voltage from the line via R40, R5 is turned into a constant voltage by D8, and then become power sup-
ply for IC1 (Pin17), and the redial Back-up will be done.
The voltage from the line is turned into a constant voltage by D6 and then supplied to the IC1 and sending and receiving circuit
of the set.
At ON-HOOK status the voltage from the line via R40, R5 is turned into a constant voltage by D8, and then become power sup-
ply for IC1 (Pin17), and the redial Back-up will be done.
4.2.5.
Sending Circuit (Tx)
When a person talk through the Handset, the voice analog signal flow from the
mic
mic
C20 VR2 R33 C21 Q9 R38 C23 Q3 J10 R111 Q1 D1 Tel line.
Q9 and Q3 is an amplifier for the voice signal.
4.2.6.
Receiving Circuit (Rx)
Receiving signal from the line go through
D1
D1
Q1 R111 J10 C10 C12 R15 Q4 C15 R19 C16 Q6 C17 R26 Q7 C18 VR1
Handset speaker.
Q4 and Q6 is amplifier for the Receiving signal.
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