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ViewSonic Va703b3 Service Manual

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2.  No Power & Power LED Off 
                                                                                                                  
                                                                                                                  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
No power 
Check primary 
rectifier voltage Check IC802, 
C805, T801 Check circuit 
if short 
Check F801, P801, 
D801 
Check pin3 of 
IC802 voltage 
about 1V 
Check R801, R805, 
R822, R823, R817 
Check pin2 of IC802 
voltage about 2V Check R803, R807, 
R824, R825 
Check pin1 of IC802 
voltage is 5.8V Check R812, R816, 
C818 
END 
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3. DC output voltage is unstable
 
 
 
 
 
 
 
 
Output Voltage Unstable 
Check Vbe of   
Q801 below
 0.3V 
Check circuit if 
short Check ZD801, D803, 
D805 
Check Q802 
Check reference 
voltage Check pinR 
of IC801 
Check R809, R814, 
IC801, R818 
Check R810, R811 
Check feedback 
circuit 
Check Vpin3-4 of 
IC801 about 6V 
Check Vpin1-2 of 
IC801about1V
Check C815, D806, 
R812 
Check R809, 
R814 
END 
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4. Output power is unstable 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Unstable power 
Check sampling 
  Circuit Check R810, 
R811, R818 
 
Change R810, R811, 
R818 
Check the R pin 
voltage of IC803 
about 2.5V 
Check R809, R808, R814,
D809 
Check D806, C815 if 
short 
Change 
D806, C815 
Check pin1 of 
IC802 voltage   
is 5.8V 
     
Check pin3 of 
IC802 voltage    
about 1V Change R801, R805, R822, R823, R817 
END 
Check the C pin 
voltage of IC803 
if 3V 
 
Change 
IC803 
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5.  Backlight can’t be turned on 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
No raster? 
LED Green?  Ye s  
Ye s  
Ye s  
Backlight can’t be 
turned on. 
No Check power 
supply 
Is there high-level voltage 
on pin10 of IC501? No 
Is Ok R526? Check I/F 
board 
Ye s  
R526 open
No Ye s  
Is there instantaneously pulse wave on 
pin1, pin3, pin15 of IC501 at the 
moment                        
of restart? 
No 
Is Ok IC501? Ye s  U501, U502 fail 
No 
IC501 fail 
Ye s  
Is ok T501, T502? 
T501, T502 fail 
Are connected rightly 
CN501, CN502, CN503 and 
CN504? No Connecting the 
output connector 
again   
No 
Check feedback circuit 
Isen,Vsen.(D503,D504,D501,D502..)
Ye s   Ye s  
END 
Is there 5Vdc 
voltage on pin2of 
IC501? 
Ye s  
Ye s  
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6. Black Screeqn and backlight turn on  
Black Screen
Power FailCheck Power Supply:
Pin 1, 2 of CN101
Check Power:
Pin 2 of U101 and Pin 2
of U102
Check Reset Waveform(Pin 84 of U105)
Check Crystal Waveform(Pin 96,97  of U105)
U101, U102 Fail
Check X101,C153, C154
U105
(TSUM16AL) Fail
NG
OK NG
OK NG
OK
OK NG
Check C144 and
R172
 
 
 
 
 
 
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7. White Screen
 
W hite Screen
W orkm anshipLVD S Cable R einsert
Change LVD S C able
Check VLCD is 5V?
C heck Panel-Enable of
U 105(pin48) is high?
LVD S C able N G
U105 Fail
U105 Fail
END
OK
NG OK
NG OK OK
NG
OK NG
NG
C heck LVD S signalsP a n e l F a il
Check Q 101, Q 103, Q 107, R 105, R 106, C108, C 109, C111
C heck V cc5V  ?Power Fail
OK OK
NG
 
 
 
 
 
 
 
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8. Bad Screen
 
 
Bad Screen
Workmanship
LVD S C able N G
Check X101, C 153,
C154
C heck Pin 37, 38, 39,
40 of U 105
END
LVDS C able R einsert
Change LVD S C able
C heck C rystal:pin96, 97 of U105
C heck the com m unication  ofU 105 and U 106
OK
NG OK
NG NG
OK NG
OK
C heck the pins of C N 104U105 FailNG
 
 
 
 
 
 
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7. Recommended Spare Parts List 
Rev: 1c
Serial No. Prefi xQAG
Item DescriptionECR/ECN ViewSonic P/N Ref. P/N Location Universal number#
1 Power Cord 10A/250V        Australia A-00003671 453070800420R
2 Power Cord UK3Gx.75mm        Singapore A-00003675 453070800230R
3 Power Cord 10A/250V(china) A-00005255 453070800170R
4 Power Cord 10A/125V  A-00006679 453070800250R
5 Kit, Accessory A-00006730 703000002310R
6 Kit, Accessory CPT,  LE1734 Added on 10/04/06 A-00008046 703000002330R
7 Power Cord  7A/125V  A-00006733 453070800480R
8 Power Cord 16A/250V                  Korea A-00006734 453070800500R
9 Interface Board without speaker B-00006728 790681300610R
10 Sub Board with out speaker B-00006729 790681400610R
11 Key Board B-00006750 790631500000R
12 Back cover W/O Speaker C-00006715 501020208600R
13 Cover Hinge C-00006716 501020208700R
14 Base Assembly C-00006722 714020006100R
15 Front Panel (Bezel),W/O SPK,  C-00006723 714030006100R
16 Gray Back Cover W/O SPK C-00006724 714050006100R
17 Cable, D-SUB 15P  CB-00005254 453010100100R
18 Wire 8P 195mm  CB-00006725 430300800650R
19 Wire 30P 234mm CB-00006726 430303000570R
20 LCD PANEL 17 MT170EN01-V7-G1,AM17000057 E-00008006 631102071910R
21 LCD PANEL 17 MT170EN01-V7-G2,AM17000057 E-00008007 631102071920R
22 LCD PANEL 17 MT170EN01-V7-G3,AM17000057 E-00008008 631102071930R
23
LCD PANEL 17 CLAA170EA07Q (CPT)Added on 10/04/06 E-00008086631102070680R
24 LCD 17 MT170EN01-V9,AM17000059 Added on 12/15/06 E-00008263 631102072110R
25 PE Bag L590xW480xT0.6mm(PRINTED) P-00005272 506120300400R
26 Craft Box P-00006717 506020011410R
27 Foam (Left) P-00006718 506040008800R
28 Foam (Right) P-00006719 506040008810R
29 Generic Box P-00002515 20653
30 Generic Foam Set P-00001347 30833
31 PE BagL280xW300xT0.05mm, P-00006720 506120003420R
32
Plastics:    [All
Pedestal PL-00006721 714010006100R
Packing
Material:
 [Box,
Foam]
ViewSonic Model Number:  VS11359
Cables: [All Cables
Electronic
Components:
[CRT-EEPROM, Fly
Back Transformer,
Microprocessor] [LCD
TV-Panel]
RECOMMENDED SPARE PARTS LIST (VA703b-3)
Accessories:
[Adapter, Remote
Control]
PC Board
Assembly:  [All
PCBA]
Cabinets:  
[Front
Panel, Back Cover,
Base]
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ViewSonic Corporation
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Rev: 1c
Serial No. Prefix: QAF
Item ECR/ECN ViewSonic P/NRef. P/N Location Universal number#1Power Cord  10A/250V     Australia  A-00003671 453070800420R
2 Power Cord  16A/250V  A-00003674 453070800210R
3 Power Cord  UK3Gx.75mm      Singapor
eA-00003675 453070800230R
4 Power Cord    (CHINA)A-00005255 453070800170R
5 Power Cord, VCTF 3Gx0.75 A-00006733 453070800480R
6 Power Cord  1,H05VV-F 3Gx      Kore
aA-00006734 453070800500R
7 KIT,AccessoryA-00008007 703000002300R
8 KIT,Accessory,VA703M-CPT,  LE1734Added on 10/04/06 A-00008047 703000002320R
9 Key BoardB-00006750 790631500000R
10 Interface BoardB-00008006 790681300600R
11 Sub BoardB-00008007 790681400600R
12 CoverC-00008018 501020208610R
13 Hinge CoverC-00008019 501020208710R
14 Base AssemblyC-00008020 714020006110R
15 Front Panrl (Bezel)C-00008021 714030006110R
16 Back CoverC-00008022 714050006110R
17 D-Sub cableCB-00005254 453010100100R
18 HRN ASSY 8P 195mm UL2651#28,RoHS FW08E7 CB-00006725 430300800650R
19 HRN LVDS FFC 30P 221mm,RoH
SCB-00006726 430303000570R
20 Audio CableCB-00008002 453030300120R
21 LCD PANEL 17 MT170EN01-V7-G1,AM17000057 E-00008006 631102071910R
22 LCD PANEL 17 MT170EN01-V7-G2,AM17000057 E-00008007 631102071920R
23 LCD PANEL 17 MT170EN01-V7-G3,AM17000057 E-00008008 631102071930R
24 LCD PANEL 17 CLAA170EA07Q(CPT
)Added on 10/04/06 E-00008086 631102070680R
25 LCD Panel  17 MT170EN01-V9,AM17000059 Added on 12/15/06 E-00008263 631102072110R
26 SPEAKER 1W 16Ω 285mm,W/CAS
EE-00008010 618100100010R
27 PE Bag L590xW480xT0.6mm(PRINTED)P-00005272 506120300400R
28 Foam LeftP-00006718 506040008800R
29 Foam RightP-00006719 506040008810R
30 PE Bag, L280xW300xT0.05mmP-00006720 506120003420R
31 Craft Box P-00008011 506020011400R
32 Generic Foam Se
tP-00001347 30833
33 Generic cartonP-00002515 20653
34Plastics:Pedestal PL-00008005 714010006110R
Packing Material: [Box,
Foam]
ViewSonic Model Number: VS11359
Cabinets:   [Front Panel,
Back Cover, Base]
Cables: [All Cables]
Electronic
Components: [CRT-
EEPROM, Fly Back Transformer,
Microprocessor] [LCD TV-Panel]
RECOMMENDED SPARE PARTS LIST (VA703m-3)
Description
PC Board Assembly:
[All PCBA] Accessories
:  [Adapter,
Remote Control]
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ViewSonic Model Number: VS11359
Rev: 1c
Serial No. Prefix: QAG
Item ViewSonic P/N Ref. P/N Description Location Universal number# Qty1N/A506380001800R TAPE,WRAPPING TYPE,48mmx50M ROHS LE1915 For World Wide1.200
2N/A506380002100R TAPE,WRAPPING TYPE(VIEWSONIC),50mmx75M,LFor World Wide0.513
3N/A506431000300R FILM,PE 500mmx900M ROHSFor World Wide0.050
4 P-00006718 506040008800R CUSHION,EPS-L, LE1734For World Wide100.000
5 P-00006719 506040008810R CUSHION,EPS-R, LE1734For World Wide100.000
6N/A506150006000R PALLET,L1180xW1035xH120mm,LE1734For World Wide1.389
7N/A506039000900R CORNER PAPER,1900x50x50mm,LE1701 For World Wide5.555
8N/A506039002500R CORNER PAPER,760x50x50mm,LE1504For World Wide5.555
9N/A506038003400R CARDBOARD,L1170xW1020xT7.0mm, LE1734For World Wide1.389
10 P-00005272 506120300400R BAG,PE+EPE,L590xW480xT0.6mm(PRINTED)LE19For World Wide100.000
11 P-00006720 506120003420R BAG,PLASTIC,L280xW300xT0.05mm,LE1734For World Wide100.000
12 P-00005273 506120004500R BAG,PLASTIC,L690xW(455+145)xT0.05mm, LE1 For VSCN
100.000
13 A-00005255 453070800170R PWRCORD 10A/250V BLK 6FT CHINA.RVV 3Gx0
.For VSCN 100.000
14 A-00006733 453070800480R PWRCORD 7A/125V BLK 6FT CNS,VCTF 3Gx0.75 For TWN
100.000
15 A-00003671 453070800420R PWRCORD 10A/250V BLACK 6FT SAA,H05W-F/3
GFor Australia100.000
16 A-00006734453070800500R PWRCORD 16A/250V BLK 6FT KTL,H05VV-F 3GxFor Korea100.000
17 A-00003675 453070800230R PWRCORD 5A/250V BLK 6FT UK3Gx.75mmFor Singapore & UK100.000
18 A-00006679 453070800250R PWR CORD 10A/125V BLK 6FT UL/CSA,SVT 18xFor VSA100.000
19 A-00003674453070800210R PWR CORD 16A/250V BLK 6FT VDE,H05VV-F 3GFor VSE 100.000
20 CB-00005254 453010100100R CABLE,D-SUB 15P MALE 6FT BLACK/BLUE,SZ40For World Wide100.000
21 N/A506250009300R LBL,AGENCY,VA703B, LE1734For World Wide100.000
22 N/A506260001600R LABEL,WARNING, LE1X34For World Wide100.000
23 N/A506440002300R LABEL,BLANK,76.2x76.2mm,LE1709(UPC)For World Wide100.000
24 N/A506440002400R LABEL,BLANK,50x25mm,LE1709(S/N)For World Wide100.000
25 N/A506390000500R LABEL,QC-PASS, LE1709For VSCN 100.000
26 N/A506390000600R LABEL,HI-POT PASS, LE1709For World Wide100.000
27 N/A506440002600R LABEL,BLANK,210x65mm,LE1709(PALLET)For World Wide100.000
28 N/A506390500100R LABEL,ENERGY STAR, LE1709For World Wide2.780
29 N/A506440003000R LABEL,BLANK,35x10mm, LE1709 ROHSFor World Wide100.000
30 N/A506091000500R LABEL,WARRANTY, LE1709For VSCN 200.000
31 N/A506449000100R LABEL, Φ8mm,BLACK, LE1709For VSCN
100.000
32 N/A506390210110R LABEL,CARTON(8ms),PRC, LE1709For World Wide20.000
33 P-00006717 506020011410R CARTON,VIEWSONIC(VA703B), LE1734For World Wide100.000
34 N/A505040203600R INSULATOR,PET,355x292x0.1mm, LE1709For World Wide101.000
35 N/A506092001400R CARD,WARRANTY, LE1709For VSCN 100.000
36 N/A506030200200R CARD,AFTER SERVICE, LE1709,L130xW80For VSCN 50.000
37 A-00006730703000002310R KIT,ACCESSORY,VA703B-INL,  LE1734For World Wide100.000
38 N/A714076900000R ASSY,FINAL(G),W/O SPK,LE1734-0U0For World Wide100.000
39 N/A509116606510R SCREW,P,CROSS,M4*6,BLACK,NL ROHS (NYLOK)For World Wide100.000
40 N/A509112308100R SCREW,P,CROSS,T.T-3*8,Zn ROHS REV:AFor World Wide100.000
41 C-00006716 501020208700R COVER,HINGE,GRAY, LE1734For World Wide400.000
42 N/A509116608100R SCREW,P,CROSS,M4*8,Zn,ROHS For World Wide100.000
43 N/A503040000300R RUBBER,COVER(GRAY), LE1534For World Wide100.000
44 C-00006724 714050006100R ASSY,BACK COVER,GRAY,W/O SPK, LE1734For World Wide400.000
45 C-00006715 501020208600R COVER,BACK,GRAY,W/O SPK, LE1734For World Wide100.000
46 N/A506430300002R FILM,PE,L155xW35xT0.05mm, LE1734For World Wide100.000
47 C-00006723 714030006100R ASSY,BEZEL,GRAY,W/O SPK, LE1734For World Wide200.000
48 N/A501010206500R BEZEL,GRAY,W/O SPK, LE1734For World Wide100.000
49 N/A501030100800R BUTTON,FUNCTION KEY, LE1734For World Wide100.000
50 N/A506102000400R LOGO PLATE,VIEWSONIC, LE1709(THREE BIRDSFor World Wide100.000
51 N/A506102000300R LOGO PLATE,VIEWSONIC, LE1709For World Wide100.000
52 PL-00006721 714010006100R ASSY,STAND, GRAY, LE1734For World Wide100.000
53 N/A501260202900R STAND,GRAY, LE1734For World Wide100.000
54 N/A502110400400R SPRING SHEET, LE1734 For World Wide100.000
55 HW-00008001 502060002600R HINGE, LE1734For World Wide100.000
56 N/A509116610110R SCREW,P,CROSS,M4*10,Zn,NL ROHS (NYLOK)For World Wide100.000
57 C-00006722 714020006100R ASSY,BASE,GRAY, LE1734For World Wide100.000
58 N/A501240203800R BASE,GRAY, LE1734For World Wide100.000
59 N/A503020002700R RUBBER,FOOT,L14.8*W9.6*T3.5mm,ROHS LE171 For World Wide100.000
60 N/A502170301600R PLATE,BASE, LE1734For World Wide300.000
61 N/A503060003310R GASKET,EMI,W10xH10xL16mm,LE1734For World Wide100.000
62 N/A509112606100R SCREW,P,CROSS,T.T-4*6,Zn For World Wide100.000
63 N/A714086900000R ASSY,PANEL,W/O SPK,LE1734-0U0For World Wide600.000
64 E-00008263 631102072110R LCP 17 MT170EN01-V9,AM17000059For World Wide100.000
65 B-00006728 790681300610R PCBA,I/F BOARD,W/O SPK, LE1734-6U0For World Wide100.000
66 B-00006729 790681400610R PCBA,P/I BOARD,W/O SPK,LE1734-6U0For World Wide900.000
67 B-00006750 790631500000R PCBA,KEYPAD BOARD, LE1534For World Wide200.000
68 CB-00006726 430303000570R HRN LVDS FFC 30P 221mm,RoHS For World Wide100.000
69 HW-00005269 509146305300R SCREW,PW,CROSS,W/WAS,M3*5,NIFor World Wide100.000
70 HW-00005270 509000000700R BOLT,#4-40x11.8,Ni FOR D-SUB/DVI CONN.ROFor World Wide100.000
71 N/A502090303600R CHASSIS,W/O SPK, LE1734For World Wide100.000
72 N/A509146306102R SCREW,P,CROSS W/W-SPR,M3*6,Zn,ROHS For World Wide100.000
73 N/A505040503100R INSULATOR,PP,22x20x12X0.3mm,GLUE(3M), LEFor World Wide100.000
74 CB-00006725 430300800650R HRN ASSY 8P 195mm UL2651#28,RoHS FW08E7For World Wide100.000
75 N/A506380001200R TAPE,MYLAR,66000x20xT0.05 For World Wide100.000
76 CB-00006725 430300800650R HRN ASSY 8P 195mm UL2651#28,RoHS FW08E7For World Wide100.000
77 N/A506380001200R TAPE,MYLAR,66000x20xT0.05 For World Wide0.121
  BOM LIST (VA703b-3)
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