NEC MultiSync LCD1970NX Service Manual page 101

MODEL LCD1970NX(B)/(C) SCHEMATIC DIAGRAM MAIN BOARD (DVI/VGA Input) (3/4)
+5V D401
RBD495D
1
U406
AT24C02
4 5
GND SDA
3 6
A2 SCL
2 7
A1 WP
1 8
A0 VCC
GND
R448 100R
2 DDC_SDA_VGA
R449 100R
2 DDC_SCL_VGA
C482
NC
GND
From Host PC TMDS Signal.
P401
RGB GND
SYNC GND
DDC SCL
DDC SDA
1/3shield
2/4shield
0/5shield
clk shield
2
R442 100R
R444 100R
WR 2
GND GND GND
C483
NC
GND
ZD406
R456 R457 R458
25
R
MM3Z5V6 10K NC NC
26
G
27
B
29
28
HSYNC
8
VSYNC
GND
15
6
7
14
+5V
16
HPD
11
3
19
22
18
DAT0+
17
DAT0-
10
DAT1+
9
DAT1-
2
DAT2+
1
DAT2-
13
DAT3+
12
DAT3-
5
DAT4+
4
DAT4-
21
DAT5+
20
DAT5-
23
clk+
24
clk-
D406 D407
DVI CON SCS217 SCS217
TMDS_GND
C487 0.1uF C488 0.1uF C489 0.1uF
D402
SCS217
+5V
P402
ADC_GND
10
15 5
PC_+5V
C471 0.1uF
9
ADC_GND
14 4
8
13 3
7
12 2
D403
6
SCS217
11 1
+5V
DZ11A1-P34
ADC_GND
ADC_GND C476 0.1uF
ADC_GND
D404
SCS217
+5V
GND GND
C480 0.1uF
ADC_GND
BK2125HS431
VGA_HSYNC B420
1 2
VGA_VSYNC BK2125HS431
B421
1 2
R454
D405
RBD495D +5V 2.2K
2 1
GND
R459 R460 C486
10K 47K 0.1uf
GND
2 WR
R461 100R
R462 100R
ZD407 ZD408
MM5Z5V6 MM3Z5V6
GND
D408 D409 D410 D411 D412
SCS217 SCS217 SCS217 SCS217 SCS217
C490 0.1uF C491 0.1uF C492 0.1uF C493 0.1uF C494 0.1uF
10-3
B417 MCB1608H750G R437
1 2
C469
NC
R438 75R 1%
R439 84.5R
ADC_GND
B418 MCB1608H750G R443
1 2
C474
NC
R445 75R 1%
R446 84.5R
ADC_GND
B419 MCB1608H750G R447
1 2
C479
NC
R450 75R 1%
R451 84.5R
ADC_GND
R452 100R
U409A
R453 100R
1 2
R455
C484 C485
74LVC14
47pF 47pF
2.2K
GND
U409C
5 6
U407
AT24C02
74LVC14
8 1
VCC A0
7 2
WP A1
6 3
SCL A2
5 4
SDA GND
GND
R463 100R
DDC_SDA_DVI 2
R464 100R
DDC_SCL_DVI 2
R465 0R
RX0+ 2
R466 0R
RX0- 2
R467 0R
RX1+ 2
R468 0R
RX1- 2
R469 0R
RX2+ 2
R470 0R
RX2- 2
R471 0R
RXC+ 2
R472 0R
RXC- 2
D413
SCS217 +5V
R473 10K
TMDS_GND
C468 0.01uF
47R 1% BLUE+
BLUE+ 2
C470 0.01uF
BLUE- 2
C472 0.1uF
SOG_MCSS 2
C473 0.01uF
47R 1% GREEN+
GREEN+ 2
C477 0.01uF
GREEN- 2
C478 0.01uF
47R 1% RED+
RED+ 2
C481 0.01uF
RED- 2
U409B
R488 20R 1%
3 4
HSYNC 2
C508
74LVC14
NC
+3.3V
GND
U409D
R489 20R 1%
9 8
VSYNC 2
74LVC14 C509
NC
GND
GND
+3.3V
C507
0.1uf
GND