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