Panasonic PT-40LC12 Service Manual page 143

AUDIO SIGNAL PATH BLOCK DIAGRAM
TV MAIN C.B.A.
U7001 IC7201
(MAIN TUNER) (MTS/SAP SIGNAL PROCESS)
WF200
TP7201
R-CH
MTS/SAP
RF-IN AUDIO 22 7 SIGNAL
L-CH
PROCESS
R7202
SEPARATION
VCC
1 2 29
R7206 R7213
SEP.(L) SEP.(H)
FRONT JACK C.B.A.
IC4801 (OP AMP)
JK4801
AUDIO IN3 (R) P4801-6 P4602-6 3
AUDIO IN3 (L) P4801-8 P4602-8
5
IC4802 (OP AMP)
JK4802
PC AUDIO IN P4801-2 P4602-2 5
P4801-4 P4602-4 3
JK4703
COMPONENT
AUDIO IN1 (R)
COMPONENT
AUDIO IN1 (L)
JK4704
COMPONENT
AUDIO IN2 (R)
COMPONENT
AUDIO IN2 (L)
JK4705
AUDIO IN1 (R)
AUDIO IN1 (L)
AUDIO IN2 (R)
AUDIO IN2 (L)
IC4701 (OP AMP)
JK4701
AUDIO OUT (R)
7
AUDIO OUT (L)
1
Q4701 Q4702
MUTE-ON MUTE-ON
REAR JACK C.B.A.
WF201
WF202
TP7203
22 P4603-20 P4702-20
TP7202
P4603-18 P4702-18
23
4 SW +9V
1 P4603-24 P4702-24
P4603-22 P4702-22
7
VCC 8 SW +5V
VEE 4 SW -5V
7 P4601-14 P4701-14
1 P4601-12 P4701-12
VCC 8 SW +5V
VEE SW -5V
4
IC4751 (AUDIO SW)
TP4752
PC
2
CPN 1
1 3
CPN 2
5
TP4751
PC
15
CPN 1
12 13
CPN 2
14
7
SW CTL
SW +5V 16 VCC
SW -5V 7 VEE
9 10
1
5
3
VCC 8 SW +5V
VEE 4 SW -5V
1 INPUT SELECT
PIN 9 PIN 10 OUTPUT
L L CPN 1
L H CPN 2
H H – – –
H L PC
TV MAIN C.B.A.
IC4601
IC3701 (AUDIO/VIDEO SW) (SOUND PROCESSOR)
TV
64
WF204 WF204
LINE 1 AUDIO
4 SOUND
INPUT
LINE 2
P4702-16 P4603-16 PROCESSOR
11 40 5
SELECT
LINE 3
(R-CH)
18
(R-CH)
CPN/PC
25
TV
62
WF203
LINE 1 AUDIO
2 SOUND
LINE 2 INPUT
9 38 P4702-14 P4603-14 28 PROCESSOR
SELECT
LINE 3
(L-CH)
16 (L-CH)
CPN/PC
23
I2C CONTROL
I2C CONTROL VCC
15 18 17
VCC
42 34 33 48
SW +9V
SW +9V
P4703-23 P4604-23
P4703-22 P4604-22
AUDIO SW MUTE (H)
<FROM IC6001 (81)>
A SW CTL 1
<(FROM IC6001(27)>
A SW CTL 2
<(FROM IC6001(26)>
AUDIO LINE OUT MUTE (H)
<FROM IC6001(78)>
AUDIO SIGNAL
P4501-2
P4501-1
J4604
NOT USED
IC4602 IC4501
(OP AMP) (AUDIO AMP)
WF206 WF208
TP4602 TP4505
P4502-4
MUTE P4502-3
12 2 1 2 12
Q4501
P4502-5
MUTE
P4502-2
-ON
Q4502
WF205
MUTE
TP4601
-ON
21 6 7 4 MUTE 7
TP4506
VCC 8 SW +5V
WF207
VCC
VEE 4 SW -5V 11 9
TP4603
J4603
AUDIO AMP MUTE (H) <FROM IC6001(79)>
AUDIO AMP MUTE (L) <FROM IC6001(80)>
P4503-2
P4503-1
I2C SERIAL CLOCK FROM SYSTEM CONTROL
BLOCK DIAGRAM
I2C SERIAL DATA
TP4503
SW +27V
SPEAKER
(R-CH)
FRONT JACK C.B.A.
P4591-4
P4591-3
JK4590
P4591-5
HEADPHONE
P4591-2
JACK
SPEAKER
(L-CH)
AUDIO SIGNAL PATH BLOCK DIAGRAM
PT-40LC12/PT-45LC12