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PA
Speaker out,Regulator Board
IC2401
TO
AUDIO ANP
DG6
PA6
Q2408
Q2402
L IN
1
32
L IN
L OUT
20
Q2410
R IN
3
1
R IN
SCL1
13
15
SCL1
R OUT
Q2403
12
SDA1
14
16
SDA1
POFF DEF
19
STB5V
Q2304
RESET
18
Q2303
STB5V
MAIN DEF
Q2311
20
Q2308
A MUTE
Q2309
SP MUTE
16
9V
TO P5
PA5
12V
1
12V
IC2304
12V
2
12V
AVR 9V
STB5V
4
STB5V
+12Vs
9V
7
1
3
+12Vs
8
5V
3
TO P7
PA7
+15Vs
1
+15Vs
3
PA24
TXD
TXD
1
RXD
RXD
3
SRQ
4
STB5V
5
LOADER
LOADER
7
PA23
SUB3.3V
12V
SUB3.3V
1
SRQ
SRQ
2
SCL0
SCL0
4
SDA0
SDA0
5
SCL3
SCL3
6
SDA3
SDA3
7
VPP
VPP
8
TO DG8
PA8
VPP
VPP
8
SDA3
SDA3
9
SCL3
SCL3
10
SDA0
SDA0
11
SCL0
SCL0
12
SRQ
SRQ
14
SUB3.3V
SUB3.3V
15
TXD
TXD
3
RXD
RXD
4
LOADER
LOADER
17
ICC CONT
ICC CONT
6
SDA3(PANEL)
SDA3(PANEL)
18
SCL3(PANEL)
SCL3(PANEL)
19
PA4
PA22
1
10
11
4
5
6
7
8
9
2
1
TH-42PA20B/E
PA-Board Block Diagram
IC2301
TO
SP AMP
PA3
SPEAKER
IN
OUT+
18
13
3
SP L+
BEEF
OUT-
SP L-
17
12
4
AMP
1
SP R+
25
STB SW
SP R-
2
IC2302
SP AMP
IN
OUT+
18
13
BEEF
OUT-
17
12
AMP
25
STB SW
MUTE
9V
STB5V
Q2305
Q2306
IC7581
TO
TUNER 30V
PA2
DG2
SUB 9V
IC7551
3
5
Q7582
1
BT 30V
AVR 11V
Q7581
4
ODU 11/15V
1
2
2
5
Q7553
Q7552
ODU ON/OFF
34
IC7502
32
TV ON
AVR 9.2V
1
2
Q7501
15
MAIN 9V
21
SUB 9V2
IC7503
23
SUB 9V2
Q7502
AVR 5V
29
MAIN 5V
1
2
Q7503
31
MAIN 5V
SUB 5V
7
IC7504
19
SUB 5V
Q7505
AVR 3.3V
1
2
11
MAIN 3.3V
5
MAIN 3.3V
13
Q7509
Q7510
25
MAIN 2.5V
IC7505
MAIN 2.5V
27
Q7543
Q7504
AVR 2.5V
36
AC ON/OFF
MAIN5V
Q7541
SOS
33
1
2
Q7542
5
PA12
TXD
1
TXD
RXD
3
RXD
STB5V
5
STB5V
12V
7
12V
PA21
TXD
1
TXD
RXD
3
RXD
STB5V
STB5V
5
12V
12V
7
10
11
4
5
6
7
8
9
2
TH-42PA20B/E
PA-Board Block Diagram
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