Read Panasonic KX-TS2365RUB Service Manual online
13.4. Telephone Line Interface
13.4.1.
Circuit operation
·
On hook
Q101 is open, Q101 is connected as to cut DC loop current and cut the voice signal.
·
Off hook
Q101 turns on thus providing an off-hook condition (active DC current flow through the circuit) and the following signal flow id
for the DC loop current. T
for the DC loop current. T
→
POS101
→
D101
→
Q101
→
Q108
→
R124
→
D106
→
D101
→
R
·
The receiving signal flows:
TEL line
→
POS101
→
Q101
→
C113
→
R125
→
C108
→
Q109
→
Q405
→
Q406
→
Speaker
·
The transmission signal flows
Mic
→
Q421
→
Q424
→
C435
→
R437
→
Q108
→
Pos101
→
Tel Line
24
KX-TS2365RUB
Click on the first or last page to see other KX-TS2365RUB service manuals if exist.