Panasonic TH-42PX6U Service Manual page 192

TH-42PX600U
15.10. PA-Board (1 of 2) Block Diagrarm
PA DC-DC CONVERTER/POWER SOS
SPEAKER OUT/DIGITAL AUDIO PROCESSOR
FAN CONTROL
FOR MAIN3.3V
FACTORY PA3
USE
3.3V 1
SRQ1 2
SCL 4
SDA 5
SQUAWKER
OUT_A
SPEAKER R 39
BST_A
43
PA1
OUT_B
36
SQ_R+ 1
BST_B
SQ_R- 2 34
OUT_C
W_R+ 4 31
W_R- 5 BST_C
33
OUT_D
28
BST_D
24
WOOFER
SPEAKER R
SQUAWKER
OUT_A
SPEAKER L 39
BST_A
43
PA2
OUT_B
36
SQ_L+ 1
BST_B
SQ_L- 2 34
OUT_C
W_L+
4 31
W_L- 5 BST_C
33
OUT_D
28
BST_D
24
WOOFER
SPEAKER L
TH-42PX600U
PA-Board (1 of 2) Block Diagram
MAIN 3.3V
Q2303
D2307
D2306
1
IC2303 INPUT
OUTPUT
AVR 12V
IC2301
3
STEREO POWER STAGE R
IC2309
12V
POWER ON RESET VREG
21 AND GATE
5
IN_B 1
PROTECTION AND
7 4 OUT_Y
I/O LOGIC
IN_A 2
17
TIMING RMW
PWM_A
/GATE RECEIVE 6
DRIVE /CONTROL
TIMING RMW
PWM_B
/GATE RECEIVE 8
DRIVE /CONTROL
TIMING RMW
PWM_C
/GATE RECEIVE 16
DRIVE /CONTROL
TIMING RMW
PWM_D
/GATE RECEIVE 18
DRIVE /CONTROL
IC2302
STEREO POWER STAGE L
12V
POWER ON RESET VREG
21
5
PROTECTION AND
7
I/O LOGIC
17
TIMING RMW
PWM_A
/GATE RECEIVE 6
DRIVE /CONTROL
TIMING RMW
PWM_B
/GATE RECEIVE 8
DRIVE /CONTROL
TIMING RMW
PWM_C
/GATE RECEIVE 16
DRIVE /CONTROL
TIMING RMW
PWM_D
/GATE RECEIVE 18
DRIVE /CONTROL
IC2300
6ch DIGITAL AUDIO
PWM PROCESSOR
MUTE
VALID1
16
31 PWM SYSTEM
RESET
CONTROL CONTROL
9
PWM_1
38
SDIN1
PWM_2
37 26
SDIN2
PWM_3
36 25
SDIN3
PWM_4
35 24
LRCLK
CLOCK 19
SDA
SDA1 SERIAL RATE/
17
SCLK
CONTROL ERROR 20
SCL
SCL1 18
IF DETECTION
MCLK
AND PLL 8
MAIN 3.3V
2 AVDD
11 DVDD
78
IC2306
MAIN3.3V
RESET
4 OUT VDD 2
IC2305
EEPROM
/WP 7
MAIN3.3V
6 SCL
5 SDA VCC 8
IC2304
DIGITAL SOUND CONTROLLER
SCL2 18
SDA2 17
IC2307
32 RESET
SCL1 16 SCL1
STEREO AUDIO ADC
27 SDOUT1 SDA1 15 SDA1
26 SDOUT2
X1/64 ANTIALIAS
DOUT SERIAL
25 SDOUT3 SDIN1 11 9
DECIMATION LPF/
IF
FILTER DELTA-
BCK
8
WITH SIGMA
19 LRCLK
LRCK
HPF MOD.
7
22 SCLKOUT1
CLOCK/
SCKI
6 TIMING
CONTROL
21 MCLKO
ANTIALIAS
LPF/
DELTA-
SIGMA
MOD.
VCC VDD
3 4
MAIN5V MAIN3.3V
TH-42PX600U
PA-Board (1 of 2) Block Diagram
1
2
3
VINL
13 4
VINR
14 5