Schematic; Main Board - HP L1740 Service Manual

17" LCD Color Monitor

7. Schematic

7.1 Main Board

DVI_5V
CN202
DVI-D-Female
31 C1
SHELL1 AR
C2
AG
C3
AB
C4
AHS
C5
AGND
C6
NC
8
A VS
1
TX2-
2
TX2+
3
TX2/4 Shld
4
TX4-
5
TX4+
6
DDC CLK
7
DDC DATA
9
TX1-
10
TX1+
11
TX1/3 Shld
12
TX3-
13
TX3+
14
+5V
15
GND
16
HP Detect
17 R212 0Ω 1/10W
TX0-
18
TX0+
19
TX0/5 Shld
20
TX5-
21
TX5+
22
TXC Shld
23
TXC+
24
TXC-
32
SHELL2
GND GND
DVI Input
R219
DDC-VGA-SDA
3 ISPSDA
100Ω 1/10W
R222 DDC-VGA-SCL
3 ISPSCL
100Ω 1/10W
3 DDC_W_A
DDC-VGA-SCL
DDC-VGA-SDA
R202 100Ω 1/10W
R203 100Ω 1/10W
ZD202 ZD203
MM3Z5V6B MM3Z5V6B DDC-DVI-SCL
FB202 C202
120Ω 0.1uF 50V
DDC-DVI-SDA
GND GND
GND
R208
+3.3V
NC
R211 10KΩ 1/10W
C206 D204 D205 D206 D207 D208
0.1uF 50V
NC NC NC NC NC
GND
C207 C208 C209 C210 C211
NC NC NC NC NC
+3.3V
C215 C216
0.1uF 50V 0.1uF 50V
D212
BAV99 D213 D201
BAV99 BAV99
VGA_5V
FB204
120Ω
CN201
Rin1
11 1
6
12 2 Gin1
7
HS 13 3 Bin1
8
VS
14 4
9
15 5 R223
+3.3V
10 10KΩ 1/10W
ZD204 C228 ZD205 C229
DB15
R230
MM3Z5V6B MM3Z5V6B NC
VGA_CABLE
GND GND GND GND GND
GND GND
D215
+5V
2
3
VGA_5V
1
R236 R237 R238
C233
BAV70
U403
GND 8 1
VCC A0
7 2
WP A1
R241 100Ω 1/10W 6 3
SCL A2
R242 100Ω 1/10W 5 4
SDA VSS
R244 M24C02-WMN6TP
GND
GND
DVI-SCL 3
DVI-SDA 3
RX2- 3
RX2+ 3
RX1- 3
RX1+ 3
3 DDC_W_D
DVI_CABLE 3
RX0- 3
RX0+ 3
RXC+ 3
RXC- 3
D209 D210 D211
NC NC NC
+3.3V
C212 C213 C214
NC NC NC
GND
C217
0.1uF 50V
5/16 ADD C226
(10 mil, ┰キ︽絬)
GND
for ESD
FB203
1 2
30 OHM
FB205
1 2
30 OHM
FB201
1 2
30 OHM
R224 R226 R227 R228
75 OHM +-1% 1/10W R225 75 OHM +-1% 1/10W NC NC
75 OHM +-1% 1/10W
3
GND GND
75-ohm terminating resistor
very close to the VGA
conn.
R231
NC
R232 U201A
100Ω 1/10W
HS 1 2
ZD207
R234 C231 74LCX14T
MM3Z5V6B 2.2KΩ 1/10W
33pF
GND GND GND
R201
NC
R239 U201D
100Ω 1/10W
VS 9 8
ZD208
R243 74LCX14T
MM3Z5V6B 2.2KΩ 1/10W
C234
220pF
GND GND
GND
14
D203
+5V
2
3
DVI_5V
1
R205 R206 C204 R207
BAV70
U402
GND 8 1
VCC A0
7 2
WP A1
DDC-DVI-SCL R209 100Ω 1/10W 6 3
SCL A2
DDC-DVI-SDA
R210 100Ω 1/10W 5 4
SDA VSS
M24C02-WMN6TP
C201 C205 R213
GND
33pF 33pF
GND GND GND
Close to Scalar IC
R214 100Ω 1/10W C218 0.1uF 50V
RIN 3
C219
NC R215 100Ω 1/10W C220 0.1uF 50V
GNDR 3
R216 NC C221 NC
SOG 3
R217 100Ω 1/10W C222 0.1uF 50V
GIN 3
C223
NC R218 100Ω 1/10W C224 0.1uF 50V
GNDG 3
R220 100Ω 1/10W C225 0.1uF 50V
BIN 3
C226
NC R221 100Ω 1/10W C227 0.1uF 50V
GNDB 3
R229
NC
+3.3V
FB206
120Ω
UVCC
U201B R233
0Ω 1/10W
3 4
HSIN 3
14 U201C
74LCX14T
5
7
74LCX14T
GND
GND
U201E R240
0Ω 1/10W
11 10
VSIN 3
74LCX14T
Title
Signal Input
Size Document Number
C
Date: Tuesday , January 16, 2007
HP L1740
C230
0.1uF 50V
GND U201F
6 13 12
74LCX14T
GND
Rev
1
G1864-1A-HP-X-1-070116
Sheet 2 of 5