NEC MultiSync 20WGX2 Series Service Manual page 135

2
MODEL LCD 20WGX SCHEMATIC DIAGRAM - InputsPWR - Dsub/DVI (1/5)
3 1
INV_ENA
Q322
MMBT3906
R490 4K7
R491 4K7
Q323
MMBT3904
P303 GND GND
A2501WR2-13P
+12V
13
12 BRI
11 +12VI PBY201209T-300Y-S FB312
10 +12VI PBY201209T-300Y-S FB313
9 CGND PBY201209T-300Y-S FB314
8 CGND
GND
CGND
7
CGND
6 PBY201209T-300Y-S FB315 GND
+5VI
5 PBY201209T-300Y-S FB316
4 +5VI
3 +5VI PBY201209T-300Y-S FB317
Q304
R338
2 POFF 10K
3 1
1
R336
0805
3K3
Pitch:1.0mm
GND
R337
3K3
GND
R339 470
D333 SS14
+3_3DVDD
1 2
+5V
DRX2- 3 DRX2+ 3 DRX1- 3
SGND
ESD-111005
P302
DVI-D
1 DRX2- R515 10R
RX2- RX2- 3
DRX2+ R516 10R
2
RX2+ RX2+ 3
3
GND
4
RX4-
R317
5
RX4+ 100
6 SCL_DVI
SCL
7 SDA_DVI
SDA
8
R318
NC
DRX1-
9 R517 10R
RX1- 3 100
RX1-
10 DRX1+ R518 10R
RX1+ RX1+ 3
11
GND
12
RX3-
13
RX3+
14 +5V_DVI
5V
15
GND
16
HP
17 DRX0- R519 10R
RX0- RX0- 3 R323
DRX0+
18 R520 10R
RX0+ RX0+ 3
19
GND
20
RX5-
21
RX5+
22
GND
23 DRXC+ R521 10R
RXC+ RXC+ 3
DRXC-
24 R522 10R
RXC- 3
RXC-
SGND
Q326
MMBT3904
GND
+5V
C531 1uF/16V
GND
C532 1uF/16V
SGND
BRI source select multiplexer for
LPL panel only.
+5V
AI_ENABLE:
6374210512P
SET LOW: Select DIM_OUT(Panel control)
--MP s
SET HIGH: Select PWM_BRI(Scaler control)
3
AI_ENABLE 3,4
R469 0 4
R493 3K3
2
1
BKLT_EN 3
+5V
16 10
+5V VCC S0 I332B
9
S1 LMV358
C509 6
OE
5
+
7
0.1uF 1 GND GND
+12V 4
3 A0
5 6
YA A1 -
13 2
R332 100
YB A2
4
A3 +5V
GND
12
B0
14
7 B1
15
R498 3K3F
GND B2
8 11 GND
GND B3
I323 74LV4052_NS
GND +3_3DVDD
5V 4
+5V
5V
TO263
+5V 3,4,5
FB322 I328
PBY201209T-300Y-S AO4407 I307 LM1085IS-ADJ
5 3 2
3 VIN VOUT
4
C518 Sink
C344 6
2
0.1uF 0.1uF 7
R485 R481
1
12K 120F
8
GND R486 R483 200F
2K2
POWOFF GND
R509 R487
4K7 4K7
uP_5V_OFF
2
MUTE 3
R510
10K 2
GND
1
DRX1+ 3 DRX0- 3 DRX0+ 3 DRXC+ 3 DRXC- 3
2
3
4
GND
I333 74LV4052_NS
D309 ZD5.6B 16 10
VCC S0
2 1 9
C527
S1
6
OE
SGND D311 RLS4148 0.1uF 2
DDC_SCL_DVI 3
1
2 1
Q325
A0
DDC_SCL_DVI GND 3 5
YA A1 MMBT3904
DDC_SDA_DVI
13 2
YB A2
4
A3
D314 ZD5.6B
DDC_SDA_DVI 3
2 1 12
B0
14
B1
SGND D317 RLS4148 7 15
GND B2
2 1 8 11
FB305 GND B3
5V_DVI
PBY201209T-300Y-S
DVI_CAB 3
R322
100
1 2
C320
10K +5V
GND
0.1uF D318 MMBD7000
C322 0.1uF
SGND
SGND
2 R501 3K3
DVI_CTL 3
C530
0805
2.2uF
GND
+5V
R488 R489
tage.
4K7F
6K8F
GND
I331
MMDT3904
R492
10KF
C1 I332A
2
B2 LMV358
5 GND
E1 B1
6 3
+
E2 C2 R494
Q324 2 1
2 10KF
MMBT3906
-
DIM_OUT 4
GND
GND
R329 4K7 R495 10KF
Q303
MMBT3906
Q301
2
PWM_BRI 3
MMBT3904
R330 10K R331 10K
2
C330 C331
10nF
0.1uF
GND
R334 3K3
+3_3AVDD +1_8DVDD
PBY201209T-300Y-S 5160_1_8V
FB325
+3_3DVDD 3,4 +3_3AVDD 3 5160_1_8V 4 +1_8DVDD 3
I306 LM1085IS-ADJ
3 2
VIN VOUT
4
FB321
Sink
PBY201209T-300Y-S
R482
120F
TO263 +1_8AVDD
R484 56F
+1_8AVDD 3
FB324
PBY201209T-300Y-S
GND GND GND
+5V
D301
RLS4148
C301 1uF/16V
1 2
C303 C304 C305
C302 0.1uF D302
ZD5.6B 0.1uF 0.1uF
10nF
R304 R305
1 2
I303 24LC02B 47K 47K C307
8
D305 GND
A0 VCC
RLS4148 0.1uF
7
WP
A1 WP
1 2
6
R310 47
A2 SCL
5
R311 47
VSS SDA
C311 C312
2
R312 3K3
3 WP_EN
47pF 47pF
Q302
MMBT3904
GND
C313 1uF/16V
C315 0.1uF
R499
R315 R316 R303
4K7
47K 47K 4K7 I304 24LC02B
R500
8 1
3K3 VCC A0
DVI_SW 3
WP 7 2
WP A1
CE_SCL
R320 47 6 3
SCL A2
CE_SDA
R321 47 5 4
SDA VSS
2 1 C318 C319 DVI_CE
+5V
GND
D308
C314
RLS4148 47pF 47pF
0.1uF
2 1
GND
GND
D312
C316
ZD5.6B
0.1uF
5V_DVI 2 1 C523 1uF/16V
D315
RLS4148
PC_SCL
C524 0.1uF
PC_SDA
R502 R503 R504
47K 47K 4K7 I334 24LC02B
8 1
VCC A0
7 2
WP
WP A1
6 3
R505 47
SCL A2
5 4
R506 47
SDA VSS
C525 C526 DVI_PC
GND
47pF 47pF
GND
10-1
R475
I324 C512
10K TP205
NC7SZ04 0.1uF
22pF
C513
2 4
C515 22pF
4.7uF/16V-1206 C516
High-33msec
POWOFF
R478 22
3 PWRDOWN
uP_5V_OFF
R508 22
3 DPMS_SW
4 KEY_SW
5V
R476
10K
1 2 3 4
4 uP_KEY_PWR
I326A I326B
74HC14
74HC14
5 6 9 8
4 uP_IR_RS770
I326C I326D
74HC14
74HC14
Vsync
BK2125HS431
R302 100 FB301
3 VSYNC1
Hsync
BK2125HS431
R307 100 FB302
3 HSYNC1
C308
R308 R309 C309 C310
10pF
2K2 2K2 47pF 47pF
GND
SGND
PBY201209T-300Y-S
PIN_9
FB303
R313 100
DDC_CLK
D306 ZD5.6B
1 2
D307 RLS4148
3 DDC_SCL_VGA
1 2
SGND
DDC_DATA
R314 100
3 DDC_SDA_VGA
D310 ZD5.6B
1
2
D313 RLS4148 PIN_10
1 2 SGND
D316
PBY201209T-300Y-S
MMBD7000
R319 100 FB304
3 VGA_CAB
1 2
+5V
SGND
SGND
BLUE
C317 0.1uF
SBK160808T-101YS
SBK160808T-060YS
FB306 FB307
C321 0.1uF R324 20
3 BLUE+
+5V
1 2
D319 MMBD7000
C324 0.1uF
GREEN
SGND SGND
SBK160808T-101YS SBK160808T-060YS
FB308
FB309
C325 0.1uF
3 GREEN+
R326 20
+5V
1 2
D320 MMBD7000
C327 0.1uF
RED
SGND SGND
SBK160808T-101YS
SBK160808T-060YS
FB310 FB311
C329 0.1uF R333 20
3 RED+
+5V
1 2
D321 MMBD7000
C333 0.1uF
SGND SGND
5V
TP204
C511
1uF/16V
I325
21 43
XTAL1 P0.0/AD0
42
P0.1/AD1
41
P0.2/AD2
40
P0.3/AD3
39
P0.4/AD4
20 38
XTAL2 P0.5/AD5
37
P0.6/AD6
10 36
RST P0.7/AD7
24
P2.0/A8
17 25
T1/P3.5 P2.1/A9
16 26
TO/P3.4 P2.2/A10
PA 15 27
INT1/P3.3 P2.3/A11
IRB 14 28
INT0/P3.2 P2.4/A12
29
P2.5/A13
30
P2.6/A14
31
2
T2/P1.0 P2.7/A15
3
T2EX/P1.1
4 19
P1.2 RD/P3.7
5 18
P1.3 WR/P3.6
6 32
P1.4 PSEN
7 33
P1.5 ALE/PROG
8 13
P1.6 TXD/P3.1
11
9
P1.7 RXD/P3.0
SM89516C25JA
P301
8
15
7
14
6
13
5
12
4
11
3
10
2
9
1
VGA DB15
DIP TYPE