Panasonic TH-37PA20AA, Service Manual

Page: 475 / 600

14.6. PA-Board Block Diagram
IC7505
1 2
AVR 2.5V
IC7503
1 2
AVR 5V
IC7502
1 2
AVR 9.2V
IC7504
1 2
AVR 3.3V
IC7551
1 2
AVR 11V
9V
Q7503
Q7501
MAIN 9V
SUB 9V2
MAIN 5V
SUB 5V
ODU 11/15V
MAIN 3.3V
MAIN 2.5V
12V
PA6
1
13
3
14
16
19
18
20
L IN
R IN
SDA1
SCL1
SP MUTE
RESET
POFF DEF
MAIN DEF
15
1
32
16
R IN
SCL1
SDA1
L IN
20
12
L OUT
R OUT
Q2408
Q2410
IC2401
AUDIO ANP
Q2402
Q2403
18
18
IN
IN OUT+
12
13
OUT-
OUT+
12
13
OUT-
1
4
3
PA3
2
SP L+
SP L-
SP R+
SP R-
5
5
Q7502
Q7505
5
Q7553 Q7552
Q7509 Q7510
TV ON
36
32
ODU ON/OFF
AC ON/OFF
34
PA2
15
SUB 9V2
21
23
31
29 MAIN 5V
7
19
SUB 5V
11
13 MAIN 3.3V
MAIN 2.5V
25
27
2
STB5V
Q2306
Q2305
STB5V
STB5V
Q2304
Q2303
Q2308
Q2311
Q2309
BEEF
BEEF
17
17
25
25
AMP
STB SW
AMP
STB SW
MUTE
A MUTE
TO
DG6
DG2
TO
SPEAKER
TO
Q7543 Q7504
Q7541
MAIN5V
Q7542
SOS 33
IC2301
SP AMP
IC2302
SP AMP
SRQ
8
2
6
ICC CONT
SCL0
1
SRQ
IRQ
7
SDA0
STB5V
PA24
12
SUB3.3V
SCL3
1
RXD
LOADER
7 11
SDA3
PA23
VPP
SCL3
3
SRQ
5
7
7
SDA0
1
SCL3
5
SDA3
3
VPP
7
SDA1
1
STB5V
TXD
RXD
SCL2 SCL1
15
11
9
SCL0
IRQ
7
SCL1 SCL2
5
SDA1
ICC CONT
10
RST
SCL1
5 11
STB5V
ICC CONT
SDA3
4
SCL2
12V
1
STB5V
9
TXD
10
RXD
SDA1
12V
5
STB5V
4
TXD
4
12V
2
STB5V
1
TXD
SCL3
RXD
STB5V
12V
2
STB5V
8
RXD
8
PA12
PA4
PA21
6
IRQ RST
SCL2
PA8
17
TXD
4
18 SDA3
PA22
9
3
8
10
6
14
SDA1 SCL2
STB5V
ICC CONT
RST
SDA3
6
IRQ
SCL2
RST
3
SDA3
SCL3
SCL2
SCL1
SCL3
SUB3.3V
19
4
5
SCL2
SRQ
SCL0
SDA0
SCL3
SUB3.3V
SCL3
SDA3
SCL0
SUB3.3V
SRQ
VPP
SDA3
SDA0
VPP
TXD
RXD
LOADER
ICC CONT
SCL3(PANEL)
SDA3(PANEL)
TXD
LOADER
RXD
LOADER
RXD
TXD
ICC CONT
SCL3(PANEL)
SDA3(PANEL)
TO DG8
Speaker out,Regulator Board
1
12V
2
12V
PA5
3
5V
1
7
3
9V
TO P5
12V
IC2304
+12Vs
4 STB5V STB5V
12V
AVR 9V
+12Vs
8
9V
PA
+15Vs
PA7
1
3
TO P7
+15Vs
IC7581
Q7581
SUB 9V
TUNER 30V
5 1
4
3
BT 30V Q7582
TH-42PA20B/E
PA-Board Block Diagram TH-42PA20B/E
PA-Board Block Diagram
42