Schematic Diagram; Main Board - Dell E177FPc Service Manual

17" LCD Color Monitor

6. Schematic Diagram

6.1 Main Board

VGA_5V
D407
BAT54C
R452
C444
0.1uF/16V
GND
U404
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
M24C02WMN6
GND
D412
EDID_WP
EDID_WP
(3)
D402
NC 1
+3.3V_VDD
3 SPI_3V3
2
Pins 6/7/8 are R/G/B
return lines resp.
(3)
R450
DDC_SDA_VGA
11
DDC_SDA_A
R453 12
R451 220 1/16W
HS_in
13
VS_IN 14
R454 15
220 1/16W
D411
DDC_SCL_VGA
(3) LL5232B 5.6V 5%
GND
R455
220 1/16W D409
D408
LL5232B 5.6V 5%
LL5232B 5.6V 5%
+5V +5V
C448
C447 NC
NC
SPI_3V3 GND GND GND
D403 D404
BAV99 BAV99
VGA_5V
CN405
DB15
1 Rin
6
Gin
2
7
3 Bin
8
4
9 R439 R440
5 R438
10 75 1/16W
R445
GND 220 1/16W
D406 D410
LL5232B 5.6V 5%
GND GND
R446 220 1/16W
R447 220 1/16W
R448 R449
2.2K 1/16W 2.2K 1/16W
GND
Title
Size Document Number
A
Date:
23
+5V
C439
0.1uF/16V
D405
BAV99
(10 mil, ┰キ︽絬)
FB410
0.047uF
1 2 R434 C432
RED+
60 OHM 75 1/16W
0.047uF
R441 C436
RED-
100 1/16W
FB411
0.047uF
1 2 R435 C433
GREEN+(3)
60 OHM 75 1/16W
0.047uF
R442 C437
GREEN- (3)
100 1/16W
FB412
0.047uF
1 2 R436 C434
BLUE+ (3)
60 OHM 75 1/16W
0.047uF
R443 C438
BLUE-
100 1/16W
75-ohm terminating resistor
very close to the VGA
conn.
+3.3V_VDD
GND
R444
10K 1/16W
VGA_PLUG
CABLE_DET (3)
VS
(8 mil)
HS
C442 C443
NC NC
Input Connectors
Wednesday, June 29, 2005 Sheet 2 of
Dell E177FPc
(3)
(3)
(3)
(3)
(3)
Rev
D
6