Panasonic TH-42PA25U-P Service Manual page 151

DG22 1 3
DVI PR
DVI Y
DVI PB
IC001
MICOM
7
2 12 11 84 38 35 15
V
3.3V
80 78
6
V
IC005
2.5V
SWITCHING
Y Y0
3
Y1
X X0
13
X1
IC3003
I/O PORT SWITCHING
SCL 15
SDA 14
IC3004
SLOT DETECTION DAC
IC4515
SCL 15 SCL3
SDA 14 SDA3
10bit A/D
OSD YM
A
1
OSD YM
4 OUT
IC4519
9 14 OR GATE
OSD YS
1 A
OSD YS
4 OUT
IC4520
OR GATE
1 2 3 4 5
R-IN
INPUT
R-OUT
BRIGHT DET.
G-IN
G-OUT
INPUT
BRIGHT DET.
B-OUT
B-IN
INPUT
BRIGHT DET.
CONTRAST DRIVE CUT OFF
CONT. CONT. CONT.
23
22 21
IC4512
RGB AMP
DG7
20 17 15 13 11 10 27
TO G7
68
TO PA6
DG6
5 6 7 DG21 3 4 5 6 1 3
IC003
OUT 4
RESET
TP5399 TP5395
TP5397
TP5396 TP5398
59 51 50 49 1 82 81 44 25 60 17 18 19 3 5
IC002
EEPROM
IC3801
WP
7
SCL2
1
CONVERT MICON
SCL 6
5 SCL1
SDA 5
12 SDA2
SDA1
14
IC3803
IC3517
RESET
IC004
2 1 SCL3
6 5 SDA3
5V
REG 3.3V
IC3699
3
EEPROM
4
SRQ
7
SCL 6 SCL3
SDA 5 SDA3
IC8071
SYNC INPUT SELECT
GC HD
X0
X
12
13
PC HD
X1
14
GC VD
Y0
1
Y
PC VD
Y1
3
5
IC8008
G-IN SELECT
I0 SEL
7 5
Q8015
6 I1 COM 1
IC8200
RGB SELECT
IN1A
Q4554 Q4557
11 16
PC R
IN1B
1
IN2A
Q4555 Q4558
9
11
PC G
IN2B
14
Q4553 Q4556
7
IN3A
8
PC B
IN3B
9
IC4513
5V
AD 2.5V
1 5 2.5V
3
IC4514
5V
AVR 3.3V
3.3V
1 5
3
DG18
24 22 3 1 1 3 5
TO G18
TO PA2
16 19 20 13 14 18 DG2 32 33 34
PSTATUS
Q3
TVON OPT
AC TVON
55 48 66 67 65 61 53 62 72 8 23 24 26 27 79 69 56 43
Y0
Y TXD TU0
TXD 14 3 1
Y1 TXD TU1
RXD 15 5
X X0 RXD TU0
SCL0 53 13 12
X1 RXD TU1
SDA0 54 14
LOADER
RST 19 A 10
IC3802
OUT 6
SWITCHING
AMUTE25
Q2254 Q2253
MAIN DEF
Q2252
VAO MUTE
Q2255 Q2251
3.3V
5
AUDIO MUTE
Q2258
POFF DEF
IC8009
IC8076
SWITCHING
BUFFER
GC HP
I2 O2
5 6 3 4
GC VP
5 I3 O3 6
3
1 I1 O1 2
13 I6 O5 10
9 I4 O4 8
IC8054
SYNC
9 11
SEPARATION
6 HIN HD- 15
VIN 13
8 VD+
4 GIN CLP 17
IC8201
RGB LPF
R
OUT1
ROUT
3 25 RINA 17
G
1 GINA GOUT 14
B
OUT2
5 5 BINA BOUT 11
IC8030
OUT3
6
TEST SW
R R
2 RIN ROUT 1
G G
GIN GOUT 4
3
B B
9 BIN BOUT 8
TESTSW 5
TESTSW 6
DG30
10 4 6 8 1 2
TH-42PA20U DG-Board Block Diagram
36
IC8031
15 14
EX. I/O
Q27
10 SWGC PC
64 73
SWGC
PC
DG8
TO PA8
9 SDA2
10 SCL2
11 SDA1
SCL1
12
FA1
14 FA1
LOADER
17 LOADER IN SEL
TXD TU1
3 TXD TU1
RXD TU1
RXD TU1
4
18 AB SDA3
19 AB SCL3
TO K12
DG12
R LED
2 R LED
G LED
G LED
3
KEYSCAN1
1 KEY1
DG41
4 SCL1
5 SDA1
SCL2
6
7 SDA2
FA1
GC HD
FA1
2
REMOTE
GC VD
BC
VD S
REMOTE BC
8
HD S
DG3 TO D3
VD S
22 VD S
HD S
24 HD S
REMOTEBC
Q20
Q21
15 REMOTE OUT
R
26 R
B
28 B
G
30 G
LED SOS
LEDCTRL SOS
17
PSTATUS
POWER STATUS
5
TXD TU0
7 TXD TU0
RXD TU0
RXD TU0
9
SW CLP
NCLP
21