ViewSonic Va1903wb2 Service Manual

							 
- 71 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11 . 2   P o w e r  
 
LD1117S33
SOT-223
715G2467-A for VA1903WM
A
Power
B
25 W ednes day ,  N ov em ber 29,  2006 Tit le
Size Document Number Rev
D at e: Sheet
of
C713
NC/1uF
R704
10K 1/ 16W
R711
51K  1/16W　
N.C
R717
NC/4K7 1/16W
+5V
G2467-B-X-X-1-20061124
C707
C705
0. 1uF /16V
Q705
NC /PMBS3904
The Current of VCC3.3 (
without support 1.8V) is 
arround 196.6mA. U702 is
safe to use 1117 SOR223.
0　
BL_ADJ
R706
NC
+5V
R 721
10K 1/16W
X
+C701
100uF /50V
R718
NC / 1K 1/ 16W
C704
0. 1uF / 16V
Adj_BAC KLI GH T 4
New Power port define
X
+C708
10uF / 50V
U701
AP1117E33LA SOT223-3L ATC3
2
1
VI VO
GN D
+C711
10uF / 16V100uF/25VThe type of R713 and  R714 are 1206
C703
1F 6.3V　
VC C 1. 8
U702
I C  AI C1117A-18PY TR-R SOT2233
2
1
VI VO
GND
The Current of VCC3.3 ( with
support 1.8V) is arround
382.6mA. U702 is nt safe to
use 1117 SOR223.
R701
1K 1/ 16W
VC C 3. 3 4
R703 4K7 1/ 16W
Adj_BL2 4
0　
VLCD 5
The type of R709 ,R712
ARE 0603
X
R715 NC/4K7 1/16W
R 709
4K7 1/16W
P W M
11/16/06 : 
發　癹隔
C 710
0. 1uF / 16V
C709
0.1uF /16V
X
+5V
R 712
10K 1/10W  5%
R705 4K7 1/16WR713R31
+
C 702
100uF /25V
R702
4K7 1/ 16W
0.1uF
Q704
PMBS3906
R716
NC/1K 1/16W
on_BAC KLI GH T 4
4K7
VC C 3. 3
C705
47
+12V 4
VLC D
R710
10K 1/16W
+5V 3,4
D C+5V
Q701
PMBS3904
R707 NC
XR714
CN701
CONN
123456789
+5V
SMAL140
+5V 3,4
For 15, Power Board will support +3.3V.
And D701, C707, U701, C705, C709 should replace
to R713 and R714.
Over 15
R720
NC / 1K 1/ 16W
SOT-223
U701The type of R707 and  R706 are 1206
+12V
C32
+5V
For 15
R708
10K 1/16W
D701
SMAL140
on_Panel 4
The Current of VCC1.8 is 
arround 184.9mA. U? is safe
to use 1117 SOR223.
1uF
+C706
10uF / 50V
Q703
AO3401
SOT-223
Q702
PMBS3904
VC C 1. 8 4
D701
R 719
NC/1K 1/16W
C707
0. 1uF / 16V
X
+5V
  
						

							 
- 72 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11.3   Input 
 
715G2467-A for VA1903WM
A
INPUT
B
35 Wednesday , N ov ember 29, 2006 Ti t l e
Size Document Number Rev
D at e: Sheet
of
FB402
0R05 1/10W
C 413
0.22uF
C412
220pF
PC5V
R 410 470R  1/ 16W
DDCA_SDA 4
ZD403
UDZS5.6B12
BLUE-
R 404
56Ω 1% 1/16W
SCL_VGA
ZD402
UDZS5.6B
12
RED+
ZD405
UD ZS5.6B12
R418
10K 1/ 16W
R416 1K 1/16W
RIN 4
VGA_CON
D 401
BAV9931
2
C 404 0. 047uFVSY N C 4
GN D R 4
GREEN-
U403
AF 24BC02-SI
1234
5678
A0
A1
A2
VSS SD A SC L WP
VC C
R402
75  1/ 16W　
GI N 4GN D B 4
ZD407
UDZS5.6B
12
C 406 0. 047uFDET_VGA 4
C 401 0. 1uF / 16V
GN D G 4
R 409 100R  1/ 16W
GREEN+
R421
10K 1/ 16W
R 417 47R  1/ 16W
+5V
FB403
0R05 1/10W 5%
D403
BAV9931
2
ESD_5V
R414 1K 1/16W
FB404 120 OHM
VSI
BIN 4
SDA_VGA
ZD 404
UD ZS5.6B12
R 407 100R  1/ 16W
FB401
0R05 1/10W
+5V
R403
75  1/ 16W　
C 409 0. 047uF
CN401
DB15
162738495
1112131415
10
1716
C 410 0. 047uFC 408 0. 047uF
RED-
HSY NC 4C 405 0. 047uFC 407 0. 047uF
BLUE+
D412
BAV70
31
2SOG 4
R411
10K 1/ 16W
HSI
+5V
D402
BAV9931
2
R415
2K2 1/ 16W
DDC_WP 4
R422
1K 1/ 16W
R 412 20K  1/16W
　
+5V 2, 4
The type of FB410, FB411 and  FB412 are 0603ZD 406
UD ZS5.6B12
C 402 0. 1uF/ 16V
C 403 0. 1uF / 16V
DDCA_SCL 4R 408
56Ω 1% 1/16W
ZD401
UD ZS5.6B12
G2467-B-X-X-1-20061124
R 405 100R  1/ 16W
R 406
56Ω 1% 1/16W
R401
75  1/ 16W　
R420
10K 1/ 16W
R 419 47R  1/ 16W
PC5V
C411
33pF
PC5V
R413
2K2 1/ 16W
  
						

							 
- 73 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11.4   Scaler
 
VDDC
C 435
0. 047uF
R 514 10K 1/ 16W
R475
10K 1/ 16W
R469
10K 1/ 16W
PA[ 0. . 9]
VCC3.3 2
R 466
240  1/ 16W　
VCC1.8 2
715G2467-A for VA1903WM
A
SCALER
C
45 W ednes day ,  N ov em ber 29,  2006 Ti t l e
Size D oc um ent  N um ber R ev
D at e: Sheet
of
D 415
BAV99
3
12
VCC3.3
C431
0. 047uFC442
0. 047uF
+12V 2
R 485
1K 1/ 16W
Q408
2N 7002E
The Current of 
VPLL is arround 
185.7 mA.The Current of  VDVI is
arround  49.0
mA.(Digital)
G2467-B-X-X-1-20061124
AUDIO_STBY
R 505 N C
FB409
600 OH M
R 500
4K7 1/ 16W
DDCA_SCL 3
U 405
NC/MAX810STRG
12
3
GN D RESET
VC C
R 460 100R 1/ 16W
GNDB 3
SC L_D B
KEY 2
KEY 1
R 509
10K 1/ 16W
POWER PB8
AUDIO_CTRL
Q410
PMBS3906
C434
220pF
PA4
AUDIO_MUTE
R513
10K 1/ 16W
+5VKEY 1 SD A_D B
C427
NC
U 402
PM25LV010A
12
34
56
78
CE# SD O
WP#
VSS SDISCK HOLD# VDD
R 468 4K7 1/ 16W
The Current of 
VPLL is arround 
28.3 mA.
R 467 0R 05 1/ 16W
VCC3.3
+5V PB5
Q403
PMBS3906
R 461 100R 1/ 16W
C 445
0. 047uF
U 406
M24C 04-W MN 6TP
1234
5678
NC
E1
E2
VSS SDA SCL WCVCC
C 433
220pF
VCC3.3 2
VPLL
PA5
F B408
600 OH M
VCC3.3
LED _A
23202118221917272815262537393840
478659
9697
60616263646567686970717273747778585554
25
8
11293324
56
5352
81
51
3031
93
14
75
35488588899091929495994344
84
4142
9816
3249
668234
5057767983
80
87364546 RIN0P
GI N 0P
SOGI N 0
BI N 0P RIN0M
GI N 0M
BI N 0M
HSY NC0
VSY NC0
REXT
REFP
REFM
SD O
SC K SC Z
SD IPWM2/GPIO_P24
PWM1/GPIO_P25LVACKM
XI N
XO U TLVA2P
LVA2M
LVA1P
LVA1M
LVA0P
LVA0M
LVB3P
LVB3M
LVBC KP
LVBCKM
LVB2P
LVB2M
LVB1P
LVB1M
LVB0P
LVB0M LVAC KPLVA3MLVA3P
GN D
GN DAVDD _DVI
GN D
GN D
GN DAVDD _AD C
VDDP
MO D E[ 1 ] MO D E[ 0 ]VCTRL
VDDC
DDCA_SDA/RS232_TX
DDCA_SCL/rs232_R X
PWM0/GPIO_P26
AVDD _DVI
VDDP
GPI O_P15/ PW M0
GPI O_P27/ PW M1
GPI O_P12
GPI O_P00/ SAR 1
GPI O_P01/ SAR 2
GPI O_P02/ SAR 3
GPI O_P06
GPI O_P07
GPI O_P13
GPI O_P14
GPI O_P16/ PW M2
GPIO_P11/I2C_MDAGPIO_P10/I2C_MCL RSTGPI O_P23
GPI O_P22
AVDD_MPLL
AVDD_PLL
VDDP
VDDP
VDDC
VDDC
VDDC GN D
GN D
GN D
GN D
GN D
BY PASSRSTNNC
NC
NC
+5V
C 429 22pF
PA1
PB3
R 504
4K7 1/ 16W
R 445
10K 1/ 16W
GNDG 3
R 446 20  1/ 16W
　
The Current of 
VMPLL is arround
 19.3 mA.
OU T-R +
C 452
NC
FB407
600 OH M
SOG 3
Volume PB4
R499
47R  1/ 16W
R 501 N C
R503
47R  1/ 16W
VCC3.3 2
The Current of 
VDDP is arround 
35.9 mA.(Analog)
VDDP
XO U T
Q405
PMBS3904
VCC3.3
R 502
47R  1/ 16W
FB405
600 OH M
DDCA_SDA 3
on_PAN EL 2Adj_BL2 2
The Current of 
AVDD is arround 
18.1 mA.(Digital
)
R 510
10K 1/ 16W
C 448 0. 22uF+5V
CN404
CONN24681012
1357911
C 424
0. 1uF / 16V
R 456 22K 1/ 16W
C 446
0. 1uF / 16V
XI N
SC L_D B
R 476 100R  1/ 16W
KEY 3
R 488
N C / 8K2 1/ 16W
R 512
10K 1/ 16W
C 451
NC
AVDD_DVI
PB[0..9] 5
R 489
N C / 10K 1/ 16W
DET_VGA 3
LED _G
Q409
2N 7002E
VCC3.3
POWER
R 464 4K7 1/ 16W
DDC_WP 3
LED _A
C436
0. 1uF/ 16V
R 507 10R  1/ 16W
The Current of 
AVDD is arround 
68.1 mA.(Analog)
C N 403
CONN
1
2
3
4
5
6
7
8
9
10
XI N
C 430
0. 047uF
SD A_D B
BI N 3VPLL
VDDP
OU T-L+
R 474 100R  1/ 16W
R 518
N C/ 1K 1/ 16W
+5V
PB7
R471 0R05 1/16W
C 443
0. 047uF
KEY 3
X401
14. 31818MH z
12
The Current of 
VDDP is arround 
43.4
mA.(Digital)
+5V
R 465
10K 1/ 16W
VSY N C 3
R 447 20  1/ 16W
　
Reset  Circuit
AUDIO_CTRL
R 463 100R 1/ 16W
C 437
0. 1uF/ 16V
R 442
390  1/ 16W　
XO U T
Q402
PMBS3904
AVDD
VDDC
PB[ 0. . 9]
D414
N C / LL4148
PA9
R477
10K 1/ 16W
PA3 PA2
R451
10K 1/16W
+C 426
10uF / 16V
PA7
C 455
0.1uF/16V
VOLU ME
OU T-R +
PA[0..9] 5
VCC1.8VCC3.3
GI N 3
VMPLL
C 450
1F 6.3V　
R457
10K 1/ 16W
R 516
N C / 10K 1/ 16W
Q404
PMBS3906
The Current of  VDVI is
arround  29.8
mA.(Analog)
VCC3.3
PB6
R 484 4K7 1/ 16W
R 515 10K 1/ 16W
R519
10K 1/ 16W
R 449
10K 1/16W
PB2
WP
+5V 2, 3
VPLL
C 439
0. 1uF / 16V
VCC3.3 2
PB0
+
C 441
10uF / 16V
PA6
FB406
600 OH M
AVD DC 432
33pF
C444
0. 047uF
+5V
PB9
OU T-L+
R 487
N C / 10K 1/ 16W
R 444
10K 1/ 16W
on_BAC KLI GH T 2
WP
C 425
0. 22uF
PB1
VCC3.3 PA0
VCC3.3
R 511 100R 1/ 16W
KEY 2
C438
0. 1uF / 16V
R517
N C / 1K 1/ 16W
PA8R 462 100R 1/ 16W
R 470
75R  1/ 16W
R473
10K 1/ 16W
Z D 412
NC/UDZS5.6B
12
R 443
NC
adj_BAC KLI GH T 2
HSY NC 3
R 472 100R  1/ 16W
R 486 10K 1/ 16W
LED_G
GNDR 3
R 508 10R  1/ 16W
VCC3.3
+12V
R 506
47R  1/ 16W
R 490
N C / 8K2 1/ 16W
RIN 3
VMPLLAVDD_DVI
C 428 22pF
C440
0. 1uF/ 16V
  
						

							 
- 74 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11.5 Panel Interface 
RXO2+ RXO0-
PB7
715G2467-A for VA1903WM
A
PANEL INTERFACE
A
55 F riday ,  N ov ember 24,  2006 Ti t l e
Size D oc ument  N um ber R ev
D at e: Sheet
of LVA2M
LVAC KP
RXE2+LVB0M LVB0P
RXO1-
PB[ 0. . 9]
LVB3PLVA3M
PB5LVB3M
RXOC-
LVA0M
RXE3- LVB1M
LVAC KM
LVA1MLVA2P LVA3P
LVA1P
LVB2M
PA7
VLC D 2
RXO3-
LVB1MRXE0+
PA2
PA3 PA0
LVA3P
LVB2P
RXE0-
LVA1M
PB1RXE3+
PA5RXOC+PB2
LVB2M
R714
150  1/ 4W
　
LVA2P
LVA1P
PA8LVA2M
LVB2PLVAC KP
The type of R713 & R714 is 1206
RXO3+RXE1+
LVA0P
R 713
150  1/ 4W
　
LVAC KMLVB0P
PA6LVB0M
PA4PA9
LVBC KP
RXE1-
PA[ 0. . 9] 4
PA[ 0. . 9]
LVA3M
PB9 PB8 PB4LVBC KM
VLC D
PB3LVB1P
RXEC-RXO1+
RXEC+
C N 703
CONN
24681012141618202224
1357911131517192123
PB0RXO2-
PB6LVB3P
G2467-B-X-X-1-20061124
PA1
LVBC KM LVB3M
+C712
22uF / 50V
LVBC KP
LVA0M
PB[ 0. . 9] 4
LVB1P LVA0PRXE2-RXO0+
  
						

							 
- 75 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11 . 6    I n v e r t e r
 
R847
1M 1/ 8W
C 829
0. 1uF
D813
1N 4148W
R848
1M 1/ 8W
C 809
0. 047uF
R825
0Ω 1/ 8W
I C 801
OZ 9938GN12345678
910111213141516
DRV1
VDDA
TI MER
DIM
I SEN
VSEN
OVPT
NC1 NC2ENALC T SSTC MPCT GNDADRV2 PGN D
R804
10K 1/ 8W
R802
300KΩ 1/ 8W
DIM
R 820 N C
D802 BAV99
3
12
D810
1N 4148W
C844
0.1uF
D812
1N 4148W
ON /OF F
OPT3
R846
1M 1/ 8W
R827
3. 6KΩ 1/ 8W
C 840
1uF / 25V
C N 803CONN13
42
C 835
5pF / 3KV
C 838
0. 1uF
R 811
NC
C 839
0. 1uF
R864
15Ω 1/4W
R801
100K 1/ 8W
R806
10K 1/8W
R 852
4K7 1/ 8W
C819
0. 047uF
1
VIEWSONIC  19 4 LAMPS  INVERTERAOC (Top Victory) Electronics Co., Ltd.
11
Monday ,  D ec ember 11,  2006 Tit l e
Size Document Number Rev
D at e: Sheet
of
R 813
1M 1/8W
R815
100K 1/ 8W
Q802
PMBS3904
C 818
0. 0033uF / 16V
C804
1uF / 25V
G1899-1A-VS-X-2-20061211
R841
360Ω 1% 1/ 8W
Q801
PMBS3904
PT802
POW ER  XF MR53
7
41
8
R803
10K 1/ 8W
ZD801
RLZ5.6B12
R 819
15Ω 1/ 4W
C 828
0. 1uF
OPT1
C 822
1500PF / 50V
open lamp protection
R 833 N C
R818
15Ω 1/4W
C817
NC
R 836
1K 1/ 8W
C N 802CONN13
42
R 824
750Ω 1/ 8W
C803
0. 01uF
D806 BAV99
3
12
R832
3MΩ 1/ 2W
C 806
1uF / 25V
C N 804CONN13
42
R817
33K 1/8W
PI D
R 816
1MΩ 1% 1/ 8W
C 824
5pF / 3KV
R842
5. 1Ω 1/ 4W
Q808
R K7002
R86115Ω 1/ 4W
R 807
22R  1/ 4W
Q806
AM9945N -T1-PF
1234
8765 S
G
S
GD
D
D
D
+12V
R863
15Ω 1/ 4W
C 842
0. 1uF
R826
510Ω 1% 1/ 8W
R814
750KΩ 1/8W
C 816
22pF / 3KV
C 843
0. 1uF
Q810
R K7002
C801
0. 1uF
C 826
5pF / 3KV
C807
0. 01uF
D809
1N 4148W
C N 801CONN13
42
C 834
22pF / 3KV
C814
0. 22uF / 25V
C805
1000pF
R849
1M 1/ 8W
C 812
1500PF / 50V
OPT4
+C 811
470U F / 25V
C 841
22pF / 3KV
R829 15Ω 1/ 4W
R808
47K 1/ 8W
R843
1K 1/8W
D811
1N 4148W
OPT2
D804BAV993
12
D 803
BAV99
3
12
OPT2
Q807
R K7002
C831
470pF / 50V
C 823
1500PF / 50V
PT801
POW ER  XF MR53
7
41
8
R837
5. 1Ω 1/ 4W
C810
560PF/ 50V
R 823
82K 1/ 8W
C 808
180K 1/8W
C 820
470pF / 50V
R 850
4K7 1/ 8W
C 837
22pF / 3KV
OPT3
R822
3MΩ 1/ 2W
+C815
470U F / 25V
R862
15Ω 1/ 4W
Q805
AM9945N -T1-PF
1234
8765 S
G
S
GD
D
D
D
R831
3. 6KΩ 1/ 8W
R828
15Ω 1/ 4W
R860
1M 1/ 8W
VC C
!
Q803
PMBS3904
Q804
R K7002
D 805
BAV993
12
R809
NC
OPT1
C813
1500PF / 50V
C 827
0. 0033uF / 16V
R 853
4K7 1/ 8W
C821 NC
C 825
5pF / 3KV
Q809
R K7002
OPT4
D801 BAV993
12
!
R 851
4K7 1/ 8W
R810
1MΩ 1% 1/ 8WR805
470R  1/ 4W
R858
750Ω 1/ 8W
R 830
82K 1/ 8W
R812
10K 1/ 8W
  
						

							 
- 76 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11.7  A-D Power 
IC902
TC ET1103G12
43
+C907
NC
ON /OF F
IC903
H431BA
R913
100KΩ 1% 1/ 8W
+12V
R926
1K 1/ 8W
+C904
470U F / 25V
tNR901
NTCR
C919
0.1uF
IC901
LD 7575PS1234
5678
RT
COMP
CS
GNDOUTVC CNCHV
C909
220pF
+12V
C917
0. 1uF
C934
JUMP
Over current protection
R932
0Ω 1/4W
FB901
BEAD12
-
+BD 901
GBU 408
2
1
3
4
D902
FR103
+12V
T90 1
POW ER  XFMR
6
8
5421
11101297
VAR 901
NC
R938
3. 9KΩ 1/ 4W
C903
0. 47uF /275V
R921
1K 1/ 8W
+5VDIM
1
1.POWER OUTPUT 12V & 5 V
TPV (Top Victory) Electronics Co., Ltd.
11
Thurs day ,  December 14, 2006 Ti t l e
Size Document Number Rev
Dat e: Sheet
of
R904
3. 9KΩ 1/ 4W
R922
1K 1/ 8W
C933
0. 0015uF/ 2KV
+C936
470U F / 25V
+C912
470U F / 25V
G1899-1A-VS-X-2-20061211
R939
NC
ZD906
NC12
ON/OFFGND
GND
TO PI N 3
R 923
33K 1/8W
GND
R912
10K 1/ 8W
DIM
R901
680KΩ 1/ 4W
ZD902
RLZ5.6B12
D909
SP20100123
R911
1K 1/ 4W
C900
0. 0022uF / 250V
L903
3. 5uH
!
C901
1000PF / 250VAC
CN902123456891071112
80GL17T 37  L  GP
C932
0. 0015uF/ 2KV
R928
0Ω 1/ 4W
C902
1000pF
R903
680KΩ 1/ 4W
ZD903
PTZ 9.1B12
Q903
STP10NK70Z FP
R902
680KΩ 1/4W
GND
R906
47Ω 1/4W
F901
FUSE
Over voltage protection
C910
470pF / 50V
C916
0.1uF
R937
100Ω 1/ 4W
C918
0. 1uF
+5V
R925
3K6 1/ 8W
R909
5.1Ω 1/ 4W
L902
L
1243
+C906
22uF / 50V
R919
470R 1/ 4W
!
L901
L
1243
D908
SP20150123
L904
3. 5uH
Over voltage protection
ZD901
RLZ13B12R934
47Ω 1/ 4WR935
47Ω 1/ 4W
IC904
NC
R941
NC
R 905
100KOHM +-5% 2w
CN901
SOC KET1
2
3
C931
0. 001uF / 1KV
C930
0. 0015uF / 2KV
+
C937
470U F / 25V
+
C935
470UF/ 25V
R927
10KΩ 1/ 4W
R910
22R 1/ 4W
GND
C908
0. 1uF
R936
100Ω 1/ 4W
TO PI N 3
R 914
0. 47 OH M +-5% 2w
ZD904
R LZ 18B
12
D 901
FR107
+
C905
100uF / 450V
D904
LL4148
+5V
+
C911
470U F / 25V
R920
1K 1/ 8W
ZD905
NC12
R924
2. 4KΩ 1% 1/ 8W
R916
100Ω 1/ 4W
R931
3. 9KΩ 1/ 4W
D903
0R05 1/ 4W
C 913
NC
NC
  
						

							 
- 77 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11.8  Audio  
+C 201
470uF / 25V
+C 209
1uF / 50V
VOLUME
C213
0. 1uF
+C 207
470uF / 16V
C N 201
PH ON EJ AC K
15243
R21120K  1/ 10W　
+
C210
10uF / 25V
+12V
GN D
R 202
200K  1/ 10W　
C 203
0. 1uF
R 203 18K  1/ 10W
　
R 212 220K  1/ 10W
　
R 210
20K  1/ 10W　
C N 202
CONN12345
678910 1
2
3
4
56
7
8
9
10
GN D
+C 202
470uF / 25V
C 212
100pF
R 2071K  1/ 10W　
 1715G2472-A For VA1903W M AUDIO
A
11 Monday ,  N ov em ber 27,  2006 Ti t l e
Size Document Number Rev
D at e: Sheet
of
CN203
NC/CONN1234
R 201 18K  1/ 10W
　
C N 204
NC/CONN
123
+
C 208
470uF / 25V
C 206 0. 47uF / 25VGND
GN D
R2081K  1/ 10W　
C214
NC
GN D
GN D
OU T _ROU T_L
STANDBY
U201
123
4
5
6
7
8
9
10
1112
13
14
15
16
17
181920GN D
GN D
GN D
INL
VAR OU T_L VOLU ME
VAR OU T_R
NC
INR
SVR
STBY
MU TE
GN D
OU TRVS VSOU TL
GN D
GN D
GN D
GN D
C 204 0. 47uF / 25V
GN D
GN D
MUTE
C 211
100pF
+C 205
470uF / 16V
+12V
  
						

							 
- 78 – 
ViewSonic Corporation                              
 Confidential - Do Not Cop                                        VA1903wb/VA1903wm 
11.9  Key Pad 
           
SW001SW
2
13
4
5
C004 NC/ 0. 1uF/ 16V
LED _OR AN GE
Out -L
CN003
CONN
12
KEY 3
VC C _5V
KEY _AU TO
VC C _5V
C005 NC/ 0. 1uF/ 16V
KEY _D OW N _LEF T
R001 3K9 1/ 10W
SW005SW
2
13
4
5
715G2473-A for VA1903WM KEY
B
KEY PAD
A
11 F riday ,  N ov ember 24,  2006 Ti t l e
Size D oc ument  N umber R ev
D at e: Sheet
of
LED _GR EEN
SPKR _L+ POW ER _KEY
C001 NC/ 0. 1uF/ 16V
R002 3K9 1/ 10W
D003 NC/ RLZ36B12
R003 3K9 1/ 10W
KEY _U P_R I GH T
C003 NC/ 0. 1uF/ 16V
C 007
N C / 100pF
D002 NC/ RLZ36B12
KEY 2
LED _OR AN GE
SW004SW
2
13
4
5
C N 002
CONN
12
KEY _MEN U
KEY 2
GN D
SPKR _R +
R 005 1K 1/ 10W
FB01
120 OH M
FB02 120 OH M
Out -R
LED _GR EEN
KEY _AU TO
KEY 3
KEY _MEN U
KEY _U P_R I GH T
ZD002
NC/ EGA10603V05A1-B
12
GN D
POWER _KEY
D001 NC/ RLZ36B12
SW002SW
2
13
4
5
KEY 1
C002 NC/ 0. 1uF/ 16V
SW003SW
2
13
4
5GN D
C N 001
CONN24681012
1357911
KEY 1
LED 001
LED
1
32
C006
N C / 100pF
ZD001
NC/ EGA10603V05A1-B
12
KEY _D OW N _LEF T 
						

							 
- 79 – 
ViewSonic Corporation           
 Confidential - Do Not Cop                  VA1903wb/VA1903wm 
12. PCB Layout Diagram 
 
12.1  MAIN BOARD PCB TOP VIEW 
 
 
 
  
						

							 
- 80 – 
ViewSonic Corporation           
 Confidential - Do Not Cop                  VA1903wb/VA1903wm 
12.2 MAIN BOARD PCB BUTTON VIEW