14.12. PA and G-Board Block Diagram
JK3709
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
MUTE
IC7581
A MUTE
Q7581
L IN
TO
Q7582
25
24
SUB 9V2
L OUT
R OUT
BT 30V
1
IC2401
SOUND CTRL
Q2312
IC2403
11
11
IN
IN
STB5V
OUT+
17
16
OUT-
OUT+
PA12
17
2
33
IC2305
SP AMP(L)
7
4
AVR 2.5V
IC2306
1
SP L+
SP AMP(R)
3
PA
IC7503
TXD
1
RXD
2
SP L-
AVR 5V
IC7502
16
1
SP R+
4
OUT-
2
AVR 9V2
IC7504
PA3
1
2
SP R-
5
AVR 4.2V
Q7502
9V
Q7509
Q7501
Q7510
MAIN 9V
12
TV ON
36
32
SUB 9V2
SUB 5V
AC ON/OFF
12
MAIN 4.2V
PA21
BEEP
PA2
MAIN 2.5V
21V
15
3
RXD
SUB 9V2
5
12V
21
4
12V
23
TUNER 30V
STB5V
BEEP
PA6
7
1
19
13
3
SUB 5V
11
13
MAIN 4.2V
14
TXD
16
MAIN 2.5V
19
25
18
1
20
27
Speaker out,Regulator Board
STB5V
Q2306
L IN
4
R IN
Q2305
SDA1
STB5V
SCL1
DG6
SP MUTE
STB5V
DG2
Q2304
TO
Q2303
SPEAKER
Q2308
TO
RESET
IC7505
Q2311
POFF DEF
1
Q7543
AMP
Q2309
MAIN DEF
2
Q7504
30
5
2
Q7541
MAIN4.2V
3
Q7542
1
STB SW
31
SOS
R IN
AMP
SCL
STB SW
SDA
SD
A3
VPP
2
1
11
SD
A3
LO
ADER
SD
A3
PA8
SCL0
TXD
17
SRQ
RXD
7
LO
ADER
SUB3.3V
SCL0
SRQ
SD
A0
6
5
VPP
8
PA24
SD
A0
SRQ
RXD
SUB3.3V
T
O
DG8
9
SRQ
3
VPP
TXD
SCL3
8
14
TXD
4
12
SUB3.3V
RXD
SD
A0
SD
A0
SCL3
4
PA23
LO
ADER
10
SCL3
TX
VPP
3
1
STB5V
SCL3
SCL0
SRQ
SCL0
7
RX
SD
A3
15
SUB3.3V
LO
ADER
4
5
PA22
7
8
11
SCL2
IRQ
9
4
STB5V
IIC CONT
SCL3
RST
SD
A3
SCL2
2
RST
SD
A1
SCL1
SD
A3
6
SD
A1
SD
A2
SCL3
1
SCL1
STB5V
SD
A2
IRQ
10
PA4
IIC CONT
5
SD
A2
7
SCL2
SCL1
10
IRQ
SCL2
SD
A1
STB5V
4
SD
A1
RST
5
11
IRQ
STB5V
1
RST
SD
A2
6
SCL1
SCL3
IIC CONT
SD
A3
IIC CONT
8
SD
A3
9
2
SCL3
SCL3(P
ANEL)
18
SCL3(P
ANEL)
SD
A3(P
ANEL)
6
IIC CONT
SD
A3(P
ANEL)
19
IIC CONT
SRQ
12V
12V
7
RXD
STB5V
3
TXD
TXD
RXD
STB5V
1
5
STB5V
1
+15Vs
2
TO P7
+15Vs
PA7
T
O
D4
TO D12
STB5V
1
IC2304
NR14V
3
2
NR21V
STB5V
1
TO PF10
5
AVR 9V
PA10
9V
7
+15Vs
+15Vs
NR21V
2
1
IC7501
AVR 9V
SUB 9V
3
5
SUB 9V
SUB 9V
14V
1
12V
AVR 12V
2
IC2102
OUT-
HP OUT
OUT+
1
17
28
HP IN
IC2302
HP AMP(R)
4
AMP
12
11
BEEP
STB SW
16
IN
HP IN
SUB MONO
7
10
ACTIVE FL
400Hz
HPF
IC2402
200Hz
LPF
ACTIVE FL
BEEP
28
STB SW
HP IN
1
17
16
IN
HP OUT
IC2301
HP AMP(L)
12
11
4
AMP
OUT-
OUT+
Q2310
W R+
PA1
5
W R-
WOOFER
TO
2
W L+
4
W L-
1
PA9
6
HP L
4
HP R
6
Front Input Board
R
L
28
VOL.UP
S3707
V
TO
KEYSCAN1
S3702
G7
KEYSCAN2
S3703
2
5
3
1
G
C
16
Y
S3705
DG7
IN
S3706
CH.DN
CH.UP
TO
12
G5
VIDEO3
19
ASPECT
C
V
G
VOL.DN
4
V-pulse
14
SW
HP
TV/VTR
R
5
L
Y
OUT
R
R
S3704
18
DG18
L
H-pulse
G18
26
JK3714
9
B
(fH=31.5kHz)
VGA
PC IN
TH-42PX20U-P
PA and G-BOARD BLOCK Diagram
TH-42PX20U-P
PA and G-BOARD BLOCK Diagram
74
Summary of Contents for TH-42PX20U/P Operating
Page 9: ...6 2 Lead of Wiring 2 9 ...
Page 10: ...6 3 Lead of Wiring 3 10 ...
Page 11: ...6 4 Lead of Wiring 4 11 ...
Page 12: ...6 5 Lead of Wiring 5 12 ...
Page 34: ...15 2 Parts Location 2 34 ...
Page 35: ...15 3 Parts Location 3 35 ...
Page 36: ...36 ...
Page 37: ...15 4 Parts Location 4 15 5 Parts Location 5 37 ...
Page 38: ...38 ...
Page 42: ...17 2 Electrical Replacement Parts List 42 ...
Page 54: ...D12 K1KA07A00189 7P CONNECTOR 1 54 ...
Page 348: ...1 Applicable signals 4 TH 42PX20U P ...
Page 353: ...6 Location of Lead Wiring 6 1 Lead of Wiring 1 9 TH 42PX20U P ...
Page 354: ...6 2 Lead of Wiring 2 10 TH 42PX20U P ...
Page 355: ...6 3 Lead of Wiring 3 11 TH 42PX20U P ...
Page 356: ...6 4 Lead of Wiring 4 12 TH 42PX20U P ...
Page 357: ...6 5 Lead of Wiring 5 13 TH 42PX20U P ...
Page 358: ...6 6 Lead of Wiring 6 14 TH 42PX20U P ...
Page 367: ...9 4 IIC mode structure following items value is sample data 23 TH 42PX20U P ...
Page 376: ...32 TH 42PX20U P ...