Panasonic KX-TA308 Service Manual page 15

+24V
Q1A
CN3
L2A
T 2
0
R 3
DOOR 1 DOOR
L1A
CONVERT SW
0
+24V
CN4
L2C
T 2
0
R 3
DOOR 2
L1C
0
POWER SW
COMMUNICATE=5V
NOT COMMUNICATE=0V
Q2A
+24V
Q4A
C8A
T1A
1 6
1µ
2
3 4
Q5A
+24V
DOOR HOOK DETECT
Q1C
Q2C
+24V
C8C
T1C
1 6
1µ
2
3 4
+24V
Q3C
COMMUNICATE
5
0
D3A
C4A R5A
0.033 10K
R10A 330K
C7A 330P
+24V
C12A
0.022
8
2
R11A
1
3
47K
IC1A
4
RECEIVE
AMPLIFIER
DOOR CONNECT DETECT
R20A
Q7A
0
ON HOOK=0V
Q3A
OFF HOOK=5V
D3C
C4C 0.033
R5C 10K
R10C 330K
C7C 330P
+24V
Q4C C12C
0.022
8
2
R11C
1
3
47K
IC1C
4
Q5C
R20C
0
Q7C
KX-TA308 DOORPHONE/DOOR-OPENER CARD (1/2)
SEND AMPLIFIER
VAG
C6A R14A
7
0.1
10K
VAG
NOT CONNECT=0V
VAG
R19C 10K
C6C R14C
7
0.1 10K
VAG
(1)
R4A 220K
C10A 0.0015
IC2A
2 8
R2A
1
(2)
3
2.2K
4
C11A
0.022
R19A
10K
R9A
6
10K
5
IC1A
VAG VAG
(3)
CONNECT=5V
(4)
(5)
R4C 220K
C10C 0.0015
8 IC2C
2
R2C
1
(6)
3
2.2K
4
C11C
0.022
R9C
6
10K
5
IC1C
VAG VAG
(7)
(8)