NEC MultiSync 20WGX2 Series Service Manual page 138

2
MODEL LCD 20WGX SCHEMATIC DIAGRAM - USB (4/5)
+5V
3
2,3,4 +5V
C454 C455 2
R405
220uF/10V NC 10K C456 1
0.1uF
GND R409
30K
R413 D330
4K7 MM4148
Q312
3 USB_EN
MMBT3904
R414
2K2
GND GND
+5V
R419
10K
Q313
MMBT3904 R425
10K
BUSPWR
Q314
MMBT3904
UGND
+U3V3
R433
100K
I321
NC
C499
0.1uF
UGND
+U3V3 +U3V3
C500 NC
R442
NC UGND
I322
SPI_CS 1 8
CE Vcc
SPI_SD 2 7
SO HOLD
3 6
WP SCK
4 5
Vss SI
NC
UGND
I327
AO4407 +U5V +U3V3P
I317
5 3 2
VIN VOUT
6 1 4
ADJ(GND) TAB
C457 C458 C459 C460
7
0.1u AIC1117-33CY 0.1u NC
100uF/10V
8
Add
UGND
bom
Modify the drill hold
position--111405
P309
USB_B BUSPWR
R416
L302
1
2 3
3
3 4
4
4
WCM2012F2S-161T03
C481 C479 C480
NC NC R420
NC
SGND UGND UGND
X302
24 MHz
R424 FB346 R421
15K PBY201209T-170Y-S 1M
+U3V3
C489 C490 R426 C491
220K
1uF/16V 0.1uF 0.1uF
UGND UGND UGND UGND
26
BUSPOWER
U_RESETn 46
RESET#
DM 17
D-
D331 DP 18
D+
MM4148
DD1M 13
R434 DD-[1]
DD1P 14
100 DD+[1]
U_RESETn
DD2M 9
DD-[2]
DD2P 10
DD+[2]
R435
DD3M
NC 5
DD-[3]
DD3P
6
DD+[3]
DD4M
1
DD-[4]
DD4P
2
DD+[4]
I319
CY7C65640A-LFC
+U3V3
UGND
R443
NC
SPI_SCK
SPI_SD
FB345
+U3V3P +U3V3
PBY201209T-170Y-S
C468 C469 C470 C471 C472 C473
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
UGND
+U3V3
PWR2
R406 NC
R407 15K OVR2
R410 15K OVR1
R412 NC PWR1
C466
NC
UGND
NC
DM
2 R415 NC
2
DP
1
1
L301
3
DD1P 2
3 2
4
DD1M 1
4 1
NC
WCM2012F2S-161T03
R417 NC
R418 NC
L303
DD2P 2
3
3
2
DD2M 1
4
4
1
WCM2012F2S-161T03
C483 C484
R422 NC
18pF 18pF
R423
100 UGND UGND
35
GREEN#[1]
36
AMBER#[1]
37
GREEN#[2]
38
AMBER#[2]
41
GREEN#[3]
42
AMBER#[3]
43
GREEN#[4]
44 +U3V3
AMBER#[4]
29 PWR1 R427 NC PWR4
PWR#[1]
30 OVR1 +U3V3 +U3V3
OVR#[1]
31 PWR2 R428 15K OVR4
PWR#[2]
32 OVR2
OVR#[2]
54 PWR3 R430 15K OVR3
PWR#[3]
53 OVR3
OVR#[3]
52 PWR4 R436 R437 R432 NC PWR3
PWR#[4]
51 OVR4 15K 15K
OVR#[4]
C497
SPI_CS
25 NC
SPI _CS
SPI_SCK
48
SPI_SCK
SPI_SD
49
SPI_SD
UGND
R439
15K
UGND
DD3P
DD3M
DD4P
DD4M
C474 C475 C476 C477 C478
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
10-4
FB343
+U5V FB344
PBY201209T-170Y-S PBY201209T-170Y-S
P1
I318
1 8 P2 VBUS2
CTL2 OUT2
R408 0 2 7
FLG2 VCC
R411 0 3 6 C461 C462 C463
FLG1 GND
C465 220uF/10V 0.1uF 220uF/10V
4 5 0.1uF
CTL1 OUT1
C467 AIC1526
NC
UGND UGND UGND UGND UGND
P308
A2006WR0-2x5P
VBUS1 VBUS2
9 10
9 10
7 8
7 8
DD1P DD2M
5 6
5 6
DD1M DD2P
3 4
3 4
GND GND
1 2
1 2
C485 C486 C487 C488 C482 NC
5pF 5pF 5pF 5pF
UGND SGND
UGND
+U5V FB348 FB347
PBY201209T-170Y-S
PBY201209T-170Y-S
P3
I320
1 8 P4 VBUS4
CTL2 OUT2
R429
0 2 7
FLG2 VCC
R431
0 3 6 C492 C493 C494
FLG1 GND
C496 220uF/10V 0.1uF 220uF/10V
4 5 0.1uF
CTL1 OUT1
C498 AIC1526
NC
UGND UGND UGND UGND
R438 NC
P310
L304
USB_A_DUAL
3 2
3
2
4 1
4
1
WCM2012F2S-161T03 8
GND
7
DP+
R440 NC 6
DM-
VBUS3 5
VCC
R441 NC 4
GND
3
DP+
L305
2
DM-
VBUS4
3 2 1
3
2 VCC
4 1
4
1
C501 C502 C503 C504
WCM2012F2S-161T03
R444 NC NC NC NC NC C505 NC
UGND UGND SGND
VBUS1
C464
0.1uF
VBUS3
C495
0.1uF
UGND