Pa-Board Block Diagram - Panasonic TH-37PD25U-P Service Manual

TH-37PD25U-P / TH-42PD25U-P

15.6. PA-Board Block Diagram

PA DC/DC Audio
Q7508
TO JA18 NR24V
PA18
CONTROL
NR_10V 1
NR_10V 2
NR_10V
3
SUB_8.3V
7
SUB_8.3V 8
IC7502
SW REG
TO PF10 PA10 +9V(M)
5 1 AVR 2
NR_24V
9V
1
NR_10V
NR_10V 2
STB_5V 7
Q7502
+9V(M)
AC_ON/OFF 9
CONTROL
SW REG
IC7501
+5V1(D)
1 2
AVR
9V
5
SW REG
IC7503
+5V(M)
1 AVR 2
5V
5
(OPEN;ON,LOW;OFF)
Q7506
NR10V
Q7507
NR10V
CONTROL
IC7504 SW REG
+5V_1(M)
1 AVR 2
5 4.2V
SW REG
IC7505
MAIN2.5V
1 AVR 2
5 2.5V
Q7509
Q7510
+3.3V(M)
CONTROL
Q7543 STB5V Q7541
D7542
NR_24V
Q7504 D7541
NR_10V
D7545
UNR24V,UNR14V
SUB 9V(S) LINE
D7538
VOLTAGE DOWN DET
Q7544
D7537
(NR24V, NR10V, SUB9V) LINE
OVER VOLTAGE DET
TUNER POWER SOS DET
SOS BLINKING TIMES
TH-37/42PD25U/P
PA-Board Block Diagram
Q7586
NR24V
3 VREF
ERROR
1 PWM 8
DET
COMPARATOR
OSC 7
PROTECT
2 START
4 OUT 5
IC7581
Q7501
Q7581
+9V(M) BT+30V
BT+30V CONTROL
Q7584
Q7583
5V_1(M)
D7546
Q7542
D7549
D7547
+9V(M)
D7539 D7543 5VD1
MAZ30470HL
D7504
MAIN 5V_2
D7540
MAZ30390HL
+2.5V(M)
D7548
NR_10V
D7550
+2.5V(M),+9V(M) +5V_1(M),5V_2(M), NR_24V
5VD1,NR10V,NR24v LINE
VOLTAGE DOWN DET
LED 12 TIMES
to DG2
PA2
1 BT_30V
D7582
to DG6
PA6
LIN
L_IN 1 1 L AMP
Q7582 AGC
RIN
BT+30V OUT
R_IN 3 2 R AMP
SCL1
S_CLOCK1 13
SDA1
21 MAIN_9V S_DATA1 14
23 MAIN_9V
IIC_BUS
Q2303,Q2304,Q2308
3 5VD1
MAIN_DEFEAT 20
5VD1
5
POWER_OFF_DEFEAT 19
15 MAIN_9V
RESET 18
MAIN_5V_2
7
17
STB_5V
19 MAIN_5V_2
11 MAIN_5V_1
13 MAIN_5V_1
25 MAIN_2.5V
27
MAIN_2.5V SPEAKER_MUTE 16
17 NR_10V
32
TV_ON
33
SOS
36
AC_ON/OFF
NR24V
to P5 PA5
AUDIO_12V 7
Q7585
AUDIO_12V 8
4
STB_5V
IC2304
AUDIO+9V
AVR
1 3
9V
PA24 5 7 3 1 4
76
IC2302
HP/SP AMP(R)
IC2401 IC2402 18
SOUND CONTROL
ACTIVE
25 AMP STB SW
FLITER
9 VCC
3 1
400Hz
L OUT 25 5 7 8
BASS
SURROUND ADJ EQUALIZER TREBLE
8 28
TONE
R OUT 24
27 HP STB SW
30 31 26
IIC_BUS
IC2301
HP/SP AMP(L)
Q2310,Q2312
AUDIO
HP
MUTE
MUTE
CONTROL
18
25 AMP STB SW
9 VCC
Q2305,Q2306
Q2309,Q2311
8
SPEAKER
MUTE 28
CONTROL
27 HP STB SW
IIC_BUS CONNECTION(FOR FACTORY USE)
PA23 2 4 5 6 7 8 1 PA8 15 8 9 10 11 12 18 19 6 14 8 11 17 7 5 3 1 PA21 11 10 9
TO
DG8
(FOR FACTORY) (FOR FACTORY) (FOR FACTORY)
TH-37/42PD25U/P
PA-Board Block Diagram
SP_R+
13
SP_R-
12
PA3
SPEAKER(R)
1
1
2
3
4
SPEAKER(L)
SP_L+
13
SP_L-
12
PA9 TO K9
4 HP_L
1 6 HP_R
7 Vpp12V
5
STB_5V
3
RXD
1 TXD
PA12 TO D12
RESET
11 RESET
IRQ 10
IRQ
SDA3
9
S_DATA3
SCL3
8
S_CLOCK3
SDA2
7
S_DATA2
SCL2
6
S_CLOCK2
SDA1
5
S_DATA1
SCL1
4 S_CLOCK1
IIC_CONT
2 IIC_CONT
STB_5V
1 STB_5V
TO D4
PA4
8 7 6 5 4 2 1 PA22