Akai LTA-20A301, Service Manual

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1 2 3 4 5 6
A
B
C
D
6 5 4 3 2 1
D
C
B
A
Title
Number Revision Size
B
Date: 4-Jan-2005 Sheet of
File: E:\work\151720TV\20-MRTTV100.ddb Drawn By:
INT
2
1
P1.0
2
P1.1
3
P1.2
4
P1.3
5
P1.4
6
P1.5
7
P1.6
8
P1.7
9
RESET
10
RXD
11
INT
3
12
TXD
13
INT0
14
INT1
15
T0
16
T1
17
/WR
18
/RD
19
X2
20
X1
21
VS
S
22
P4
.1
23
P2.0
24
P2.1
25
P2.6
26
P2.3
27
P2.4
28
P2.5
29
P2.6
30
P2.7
31
PSEN
32
ALE/P
33
P4
.0
34
/EA[VP]
35
P0.7
36
P0.6
37
P0.5
38
P0.4
39
P0.3
40
P0.2
41
P0.1
42
P0.0
43
VCC
44
U101
8051
R106
1M
X101
12MHz
C107
22pF
C108
22pF
MCU_RESET
IRQ
V-
V+
DOWN
UP
MENU
POWER
VSS
4
A0
1
A1
2
A2
3
WP
7
SCL
6
SDA
5
VCC
8
U102
24C16
C113
0.1uF
R124 33
R127 33
R125
33 R126
33
R115
4K7 R116
4K7
SCL
SDA
DDC_SCL
DDC_SDA
CABLE
ORANGE
GREEN
R110
4K7
R112
4K7
+5V
R104
4K7
C111
0.1uF
Q103
9014
R119
2K7
Q102
9014
R120
100 R121
100
+5V
R122
1K
R123
1K
ORANGE
GREEN
LEDO
LEDG
1 2 3 4
5 6 7 8
RP101
4K7*4
POWER
MENU
UP
DOWN
+5V
C115
0.1uF
C116
0.1uF
C117
0.1uF
C118
0.1uF
C119
0.1uF
C120
0.1uF
1
2
3
4
5
6
CN102
CON6
+5V
SCL
SDA
DDC_SCL
DDC_SDA
DDC_SCL
DDC_SDA
SCL
SDA
GMCU
GMCU
GMCU
GMCU
GMCU
GMCU
GMCU
GMCU
V+
V-
LEDO
LEDG
C112
0.1uF
C114
0.1uF
C105
1uF
C106
1uF
R108
4K7
+
C110
22uF/16V
R105
5.1K
+5V
GMCU
Q101
9015
R103
10K
C104
1uF
R101
100K
+
C101
10uF
MCU_MUTE
R107
4K7
EN_TV
R117
4K7
R118
4K7
R130
2K7
R128 33
R129 33
R102
100K
C109
22pF
GMCU
+5V
REMOUT
REMOUT
+5V
TUNER_SDA
TUNER_SCL
R109
4K7
R111
4K7
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
11
11
CN101
CON11
SW
D101
IN4148
SW1
R113
0
+5V
+5V
R132
1K
R131
47
R133
4K7
R134 33
R135
33
R136
33
R137
33
STANDBY
R140
10K
R141 15K