Panasonic TH-42PX20U-P Service Manual page 248

DG22
IC001
MICOM
4517
2 12 6 84
VR 3.3V
3.3V
5
80 78
4516
VR 2.5V
IC005
2.5V
5
SWITCHING
3
13
IC3003
I/O PORT
SCL 15
SDA
14
IC3004
SLOT DETECTION DAC
IC4515
SCL 15
10bit A/D
SDA 14
OSD YM
1 B
OSD YM
4 OUT
IC4519
9 14
OSD YS
28
1 B
OSD YS
OUT
4
IC4520
C VP
C HP
HFR
1 2 3 4 5
R R-IN
13 INPUT
BRIGHT DET.
G
G-IN
15 INPUT
BRIGHT DET.
B
B-IN
17 INPUT
BRIGHT DET.
DRIVE
CONTRAST CUT OFF
CONT. CONT. CONT.
23 22 21
IC4512
RGB AMP
DG7
20 17 15 13
TO G7
93
DG6
1 3 6 7 DG21 3 4 5 6
35 38 51 50 49 1 82 81 44 25 60 17 18 19
5
IC002
EEPROM
IC3801
Y Y0
WP 7
1 SCL2
CONVERT MICON
Y1 SCL 6
5 SCL1
SDA 5
X X0
SDA2
12
X1
SDA1
14
IC003
RESET
IC3517
OUT 4
SWITCHING
2 1 SCL3
SDA3
6 5
5V
IC3699
EEPROM
SRQ 7
SCL3 SCL 6 SCL3
SDA3 SDA 5 SDA3
IC8071
SYNC INPUT SELECT
OR GATE
GC HD
X0
12
PC HD
X1
14
GC VD
Y0
1
PC VD
Y1
OR GATE 5
IC8008
G-IN SELECT
7 I0 SEL 5
6 I1 COM 1
R-OUT
Q4554 Q4557
11
PC R
G-OUT
Q4555 Q4558
9
PC G
B-OUT
Q4553 Q4556
7
PC B
IC4513
5V
AD 2.5V
2.5V
1 3
2 6
IC4514
5V
AVR 3.3V
3.3V
1 5
3
11 10 27 24 3 1 DG18 1 3 5
TO G18
1 3 16 19 20 13 14 18 DG2
PSTATUS
AC TVON
66 65 61 62 72 8 23 27 26 24
Y Y0
TXD 14 3
Y1
RXD 15
X X0
SCL2 53 13
X1
SDA2 54
RST 19 A
IC3802
IC3803
OUT 6
SWITCHING
RESET
Q2254 Q2253
IC004
Q2252
REG 3.3V
Q2255 Q2251
3.3V
3 5
Q2258
4
IC8009
IC8076
SWITCHING
BUFFER
GC HP
X 5 6 3 I2
13 GC VP
5 I3
3
I6
13
Y
1 I1
3
9 I4
IC8054
SYNC
12
SEPARATION
6 HIN HD- 15
8 VIN 13
VD+
Q8015
4 GIN CLP 17
IC8200
IC8201
RGB SELECT
RGB LPF
IN1A
OUT1
16
ROUT
3 25 RINA
IN1B
1
1 GINA GOUT
IN2A
OUT2
11
5 5 BINA BOUT
IN2B
14
IN3A
OUT3 IC8030
8
6
IN3B
TEST SW
9
R
2 RIN ROUT
G
3 GIN GOUT
B
BIN
9 BOUT
TESTSW
TESTSW
DG30 10 4 6 8 1 2
32 33 36
IC8031
14 15
EX. I/O
Q27
10 SWGC PC
79 69 45 64 73
SWGC
PC
DG8
9
10
11
12
FA1
14
TXD TU1
LOADER
1 17
TXD TU1
TXD TU0
3
5
RXD TU1
RXD TU1
4
12
RXD TU0
18
14
LOADER
19
10
AMUTE25 DG12
MAIN DEF R LED
2
G LED
3
VAO MUTE
AUDIO MUTE
POFF DEF
DG41
4
5
6
7
FA1
GC HD
2
O2 4
REMOTE
GC VD
O3 6
BC
VD S
8
O1
2
HD S
O5 10
O4 8
11
DG3
VD S
22
HD S
24
REMOTEBC
Q20
R
17
G
14
15
B
R
11 26
B
28
G
30
LED SOS
17
PSTATUS
5
R
TXD TU0
1
7
RXD TU0
G
9
4
B
SW CLP
8
21
5
6
TH-42PX20U-P
DG-BOARD BLOCK Diagram
TO PA8
SDA2
SCL2
SDA1
SCL1
FA1
LOADER IN SEL
TXD TU1
RXD TU1
AB SDA3
AB SCL3
TO K12
R LED
G LED
SCL1
SDA1
SCL2
SDA2
FA1
REMOTE BC
TO D3
VD S
HD S
REMOTE OUT
R
B
G
LEDCTRL SOS
POWER STATUS
TXD TU0
RXD TU0
NCLP