Panasonic TH-42PX20U-P Service Manual page 219

14.17. TA, TB and H-Board Block Diagram
JK002
VIDEO1
IN
VIDEO2
IN
JK001
PROG
OUT
JK003
COMPONENT1
IN
JK004
COMPONENT2
IN
TH-42PX20U-P
TA, TB and H-BOARD BLOCK Diagram
TA
Tuner Board
TNR201
1st TUNER T11
VIDEO
18 1
AUDIO
14 3
S_CLOCK
4 7
S_DATA 8
5
T12
AFC1
7
16
TB
Tuner Board
TNR251
2nd TUNER
T21
VIDEO
18 1
S_CLOCK
4 7
S_DATA
5 8
T22
AFC2
16 7
Y1
Y
C1
C
S1
V1
V
L1
L
R1
R
Y2
Y
C2
C
S2
V2
V
L2
L
R2
R
V
L
R
Y1
Y1
PB1
PB1
PR1
PR1
L1
L1
R1
R1
Y2
Y2
PB2
PB2
PR2
PR2
L2
L2
R2
R2
H
Rear AV Terminal,Input Select,Audio Board
H11
TV1V
1
MPX IN MPX IN
3 14
SCL2 SCL
SCL2 7 18
SDA2
SDA2 SDA
8 19
H12
AFC1
7
H21
TV2V 1
7 SCL2
SCL2
SDA2
SDA2 8
H22
AFC2 7
Q4203
VAO MUTE L
Q4202
VAO MUTE R
AUX0 AUX1
L L
L H
H L
H H
IC4205
INPUT SELECT
MTS
V
60
TV1
L OUT L
21 59
IN
R
R OUT 22 61
SCL2 SCL
33
SDA2 SDA
34
S1
28
C1
26
R1
25
AV1
IN
Y1
24
L1
23
V1
22
TV2
V
63
IN
S2
21
C2
19
R2
18
AV2
IN
Y2
17
L2
16
V2
15
IC4204
VAO
3
1
L
5
7 R
5
4 3
6
8 9
13
PROHIBIT
2 1
GEQ ON
THROUGH
12
PROHIBIT
10 11
IC4202
SWITCH
IC4301
AV3
IN
VYO
CO
MAIN
OUT
LO
RO
VYO
SUB
OUT
CO
MONI.
VO
OUT
S
SD
IN
S
L AMP
Q4206
R AMP
Q4205
Q4201
Q4204
IC4201
EQUALIZER
9 LOUT L IN 7
12 ROUT R IN 14
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