LM721A
Service Manual Rev: A
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6. Schematic
6.1 Main Board
VGA_PLUG
U106F
74LVC14
13
12
14
7
DVI_5V
R101 NC
GND
R163
15£[ 1/16W
R128
NC
CN101
NC (DVI_Connector)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
17
18
19
20
21
23
24
C1
16
22
C2
C3
C4
C5
25
26
T2-
T2+
SGND
T4-
T4+
DDCCLK
DDCDAT
A_VSYNC
T1-
T1+
SGND
T3-
T3+
+5V
GND
T0-
T0+
SGND
T5-
T5+
TC+
TC-
A_RED
HPD
SGND
A_GREEN
A_BLUE
A_HSYNC
A_GND
A_GND
A_GND
R136
120£[ 1/16W
D105
BAV99
6/24
gm5120
E
ANALOG&DIGITAL INPUT
MOZO
C
2
6
Friday, December 06, 2002
Title
Size
Document Number
Rev
Date:
Sheet
of
ZD105
MLL5232B 5.6V
R119
NC
C113
0.1uF/16V
USE DVI TX3,4,5 +/- PIN
R160
1M£[ 1/16W
12
NC(1N4148)
D108
R137
47£[ 1/16W
GND
ED108
1
2
C122
NC
GREEN-
GPIO4/UART_DI
AGND
R150
0£[ 1/16W
GND
VS_DVI
D104
BAV99
VGA_5V
GREEN+
Connect two grounds at one single point only.
DVI_5V
SCL_IN
ZD103
NC (5.6V)
1
2
R148
100£[ 1/16W
C101
NC
AGND
DVI_5V
GND
FB105
0
R144
4.7K£[ 1/16W
10/16 modify
+A3.3V
C123
NC
U106E
74LVC14
11
10
14
7
DDC_SCL_A1
ED102
1
2
C108
0.01uF
R120
NC
GND
C109
0.1uF/16V
R140
120£[ 1/16W
GND
C126
0.1uF/16V
DDC_SCL
R121
NC
7-21
DDC_SDA_D
R126
47£[ 1/16W
R130 47£[ 1/16W
R111
NC
AGND
R154
NC
75-ohm terminating resistor
very close to the VGA
conn.
AGND
DDC_SCL_A
P.3
R139
47£[ 1/16W
DDC_SDA
ADD1
ZD109
MLL5232B 5.6V
SDA_IN
R149
NC
GND
HOT_PLUG
(8 mil)
GND
R165
15£[ 1/16W
R164
15£[ 1/16W
ED107
1
2
C105
1uF/16V
U106B
3
4
14
7
FB101
80 OHM
RXC-IN
R147
100£[ 1/16W
GND
VGA_CONN
DDC_5V
DDC_5V
R125
47£[ 1/16W
5/10 change A+3.3V
VGA_5V
HS
VGA_PG
FB103
80 OHM
(10 mil, ©Ô¥-¦æ½u)
U104
M24C02WMN6
4
8
1
2
3
7
6
5
GND
VCC
A0
A1
A2
WP
SCL
SDA
R155
0£[ 1/16W
DDC_SDA_A
P.3
R145
100£[ 1/16W
+A5V
VS
R117
NC
AGND
GPIO5/UART_DO
FB106
0
C111
NC
R122
0£[ 1/16W
Connect two grounds at one single point only.
GND
C106
0.01uF
R138
120£[ 1/16W
RX1-IN
R109
NC
ADD2
ZD108
MLL5232B 5.6V
GND
DDC_SDA_A1
RX2+IN
D103
BAV99
DIGITAL USE
BLUE-
R166
2.2K
AGND
ED103
1
2
AGND
R158
NC
ED106
1
2
+3.3V
D-SUB
AGND
R107
NC
GND
ADC_AGND
VS_DVI
DDCA_5V
+A3.3V
+A5V
R127
NC
R102¹qªý½Ð¾aªñ ANALOG PORT
10/16 modify
GND
AGND
+3.3V
C125
0.1uF/16V
CN102
VGA
1
6
2
7
3
8
4
9
5
11
12
13
14
15
10
S1
S2
D101
BAT54C-GS08
C124
NC
FB102
80 OHM
R135
75£[ 1/16W
ZD101
MLL5232B 5.6V
R143
NC
R141
47£[ 1/16W
ED101
1
2
Pins 6/7/8 are R/G/B
return lines resp.
DDC_SDA_A1
ZD106
MLL5232B 5.6V
C110
NC
GND
VGA_5V
R110
NC
ADD D106 4/26
GPIO5/UART_DO
DDC_SCL_D
ZD104
MLL5232B 5.6V
R161
1M£[ 1/16W
RX2-
P.3
Bin
DDC_SCL_A1
C107
1uF/16V
C104
0.01uF
GND
R131
2.2K
GND
UART_DO
P.3
R102
NC
DGND
C103
1uF/16V
ZD102
NC (5.6V)
1
2
R133
75£[ 1/16W
3
R112
NC
RX0-IN
GND
SCL_IN
RX1+IN
SCL_IN
C102
0.1uF/16V
10/16 modify
ZD107
MLL5232B 5.6V
R132
2.2K
DGND
RED+
RX1+
P.3
RXC-
P.3
FB104
0
R116
NC
2
RX2+
P.3
R134
75£[ 1/16W
SDA_IN
UART_DI
P.3
SDA_IN
RXC+IN
RED-
DDC_SDA_D
ADD0
DGND
R159
NC
R142
10K£[ 1/16W
ADC_AGND
BLUE+
+A5V
1
SDA_IN
HS_in
ED104
1
2
RX0+
P.3
RX0-
P.3
Rin
ED105
1
2
DEL U101&R118 CIRCUIT 4/24
GND
+A5V
RX1-
P.3
RX0+IN
D106
BAT54C-GS08
R129 47£[ 1/16W
R123
15K£[ 1/16W
U102
NC (M24CO2)
4
8
1
2
3
7
6
5
GND
VCC
A0
A1
A2
WP
SCL
SDA
R146
100£[ 1/16W
GND
R156
0£[ 1/16W
DDC_SCL_D&DDC_SDA_D CHANGE 4/25
GPIO4/UART_DI
R108
NC
DVI_PLUG
P.3
DDC_SCL_D
Gin
R157
NC
GND
RXC+
P.3
AGND
GND
SCL_IN
U106A
1
2
14
7
R124
15K£[ 1/16W
RX2-IN
R162
1M£[ 1/16W
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