ViewSonic VA702B - 17" LCD Monitor Service Manual Download Page 45

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ViewSonic

Corporation

nfidential

Not

Copy

VA702/b

8. SCHEMATIC DIAGRAM

IS1

Q504
2N7002

51K

Ω

CN503

Q501

2N7002

D509

1N4148W

+5V

OP
4

R517
1M

C503

100n/50V

Q503
2N7002

47K

Ω

R511
510 1%

R509

C535

IS1

560

Ω

BRIGHTNESS

R522

91K 1%

C530

6.8n/50V

OP3

D501

BAV99

R524

ON/OFF

OVP1

R529

IS3

D511

1N4148W

D508
BAV99

R521
1M

C528

1.0u/25V

+14V

510

Ω

OP
3

IS3

C526

10P/3KV

510

Ω

C506

4700P/50V

VA702/b

Inverter

ViewSonic

Document Number :

SIZE :

TITLE :

DATE :

SHEET

Rev :

DRAWN BY :

CHECK BY :

APPRO BY :

OP1

D514

SKS20-04AT

510

Ω

R506

3.9K 1%

C523
6.8n/50V

QDI

R502

3.9K

C525
5P/3KV

D506
BAV99

R524

51K 1%

T501

EEL-19 22:2600

D503
BAV99

C502

2.2u/25v

IC501

OZ9910G

NDRV2

PGND

NDRV1

GNDA

LCT

DIM

ENA

VSEN

CMP_SST

ISEN

V5000

VIN

HSB

PDRV1

PDRV2

C511

2.2uF/25V

C508

22n/25V

CN504

R528

182K 1%

C532

0.1u/50V

C527
5P/3KV

R519
1M

560

Ω

C524
10P/3KV

C504

1n/50V

C534

0.1u/50V

OVP2

OP
2

R513
510 1%

C522

220uF/25V

AUO

Q505
2N7002

D510

1N4148W

R511

U502
AOP605

1
2
3

G1
S2
G2

U501

AOP605

1
2

S1
G1
S2

C509
220uF/25V

D505
BAV99

R509 510 1%

OP4

R508

100K

R527

3.3M 1%

Item

C505

0.01u/25V

OP
1

Q502
2N7002

D507

BAV99

D512

1N4148W

OP2

T502
EEL-19 22:2600

510

Ω

D504

BAV99

C507

2200p/50V

R526

47K 1%

C529

220P/50V

R510
1k

OVP2

R514 510 1%

CN502

C533

0.1u/50V

R507

3.9K 1%

D513 SKS20-04AT

R505

C531

0.1u/50V

R515
1M

47K

Ω

C536
NC

INL

OVP1

R512

R503
3M/3KV

R501
3M/3kv

D502
BAV99

CN501

R504
3.9K

R523

100K 1%

Summary of Contents for VA702B - 17" LCD Monitor

Page 1: ...Model No VS10781 17 Color TFT LCD Display Service Manual ViewSonic VA702 b ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 VA702 b_SM Rev 1a Oct 2005 ...

Page 2: ...of and specifically disclaims any warranty of merchantability or fitness for any particular purpose Further ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes Trademarks ViewSonic is a registered trademark of ViewSonic Corporation All other trademarks u...

Page 3: ...rcuit Theory 4 Disassembly Assembly 6 Troubleshooting 9 PCB Layout Diagrams 7 Recommended Parts List 1 Precautions and Safety Notices 5 Test and Adjustment 8 Schematic Diagrams 1 3 4 14 19 24 32 42 48 ii ViewSonic Corporation Confidential Do Not Copy VA702 b ...

Page 4: ...cause of the high voltage used in the inverter circuit the voltage is exposed in such areas as the associated transformer circuits 4 LCD Module Handling Precautions 4 1 Handling Precautions 1 Since front polarizer is easily damaged pay attention not to scratch it 2 Be sure to turn off power supply when connecting or disconnecting input connector 3 Wipe off water drops immediately Long contact with...

Page 5: ...he LCD contains a small amount of mercury Please follow local ordinances or regulations for disposal 13 The LCD module contains a small amount of materials having no flammability grade The LCD module should be supplied with power that complies with the requirements of Limited Power Source IEC60950 or UL1950 or an exemption should be applied for 14 The LCD module is designed so that the CCFL in it ...

Page 6: ...R 3 SCREW DRIVER 4 OSCILLOSCOPE 5 Soldering IRON 6 SOLDER 7 VGA Cable Black 15pins point to point 8 Color Analyzer 9 ISP Board 10 EDID Board 11 FOXISP EXE file 12 EDID program file 13 Power Adapter output 5V 2A 3 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 7: ...r TSU16AK AC Line Filter AC Socket TFT LCD Panel 17 MT170EN01 Innolux Feedback OVP LTV817 Power Transformer MCU W78E65p Power Transformer2 Lamp1 Lamp4 AC Input 90V 264V XTAL2 14 318MHz 24C16 Open Protection Rectifier Filter Circuit 24C02 Block Diagram On Off Brightness On Off Brightness 12V 5V AP2301 PMBT3906 Panel Enable AOP605L 1 2 3 4 1 2 3 4 5V AOP605L 4 Do Not Copy VA702 b ViewSonic Corporati...

Page 8: ... off the main current flow will be consumed through D804 and ZD802 This will prevent MOSFET which built in IC802 from being damaged under large current impulse and voltage spike D806 and C815 provide internal Auxiliary current to CONTROL pin during normal operation In addition error amplifier and feedback current to the CONTROL pin are for duty cycle control 2 1 3 DC_5V and DC_14V Output Circuit F...

Page 9: ...05 has high level DC voltage So the gate pin of Q501 has a low level voltage and the IC501 is normal operation Once one of signal IS1 IS2 IS3 and IS4 is low the voltages of Q501 gate pin is high level and make the voltage of ISEN low level the IC501 will shut down 2 3 I F Board Circuit 2 3 1 Power Input 5V is from the power board and supply for U101 FS8860 18PJ U102 FS8860 33PJ U105 MCU W78E65P an...

Page 10: ...cted to U105 26 through CN106 3 Button Key Down is defined as minus which is connected to U105 27 through CN106 5 Button Key 1 is defined as two functions of menu and exit which is connected to U105 28 through CN106 2 LED indicator on the front bezel is defined as follows a When press button Key Power U105 6 is pulled down and U105 7 is pulled high so Q104 is conducted and the LED indicator is gre...

Page 11: ... U105 6 LED_Green will send out High potential and then LED green on If Power OFF U105 7 LED_Orange will send out High potential and then LED Orange on The Panel_Vcc Backlight_En CLK DATA output to panel will follow the following sequency T1 ms T2 ms T3 ms T4 ms T5 ms T6 ms T7 ms 0 1 10 0 10 200 100 0 50 0 1 10 1000 5 AC Outlet Pin Assignment Pin Symbol Description 1 L Live 2 N Neutral 3 E GND 6 I...

Page 12: ...al of odd clock channel LVDS 9 RXOC plus signal of odd clock channel LVDS 10 RXO3 minus signal of odd channel 3 LVDS 11 RXO3 plus signal of odd channel 3 LVDS 12 RXE0 minus signal of even channel 0 LVDS 13 RXE0 plus signal of even channel 0 LVDS 14 GND Ground 15 RXE1 minus signal of even channel 1 LVDS 16 RXE1 plus signal of even channel 1 LVDS 17 GND Ground 18 RXE2 minus signal of even channel 2 ...

Page 13: ...ommand input DC 8 ENA I Enable input 9 VSEN I Voltage sense feedback 10 CMP_SST I Soft start and loop compensation capacitor 11 ISEN I Current sense feedback 12 VREF O Reference voltage output 13 VIN I Supply voltage for IC 14 HSB I High side driver buffer output 15 PDRV3 O Top MOSFET gate drive output in dual forward converter 16 PDRV1 O Top MOSFET gate drive output in dual forward converter 7 3 ...

Page 14: ...ed 48 GND Ground 49 NC Not connected 50 NC Not connected 51 VDD_ADC I ADC Power 52 REXT External resistor 390 ohm to AVDD ADC 53 AVDD PLL I PLL Power 54 GND Ground 55 AVDD ADC I ADC Power 56 GND Ground 57 BINOM I Reference ground for analog blue input 58 BINO I Analog blue input 59 GINOM I Reference ground for analog green input 60 GINO I Analog green input 61 SOGIN0 I Sync on green input 62 RINOM...

Page 15: ...fferential Clock 107 LVACKM O A Link Negative LVDS Differential Clock 108 LVA2P O A Link Positive LVDS Differential Data 109 LVA2M O A Link Negative LVDS Differential Data 110 LVA1P O A Link Positive LVDS Differential Data 111 LVA1M O A Link Negative LVDS Differential Data 112 LVA0P O A Link Positive LVDS Differential Data 113 LVA0M O A Link Negative LVDS Differential Data 114 VDDP O Digital Outpu...

Page 16: ...ction 19 P3 7 RD O EEPROM write protection control for DVI 20 XTAL2 Crystal 22 1184MHz In 21 XTAL1 Crystal 22 1184MHz out 22 GND Sink voltage ground 23 P4 0 A bi directional I O port with alternate 24 P2 0 A8 DC power on off control 25 P2 1 A9 OSD control to adjust value to increase 26 P2 2 A10 OSD control to adjust value to decrease 27 P2 3 A11 Selection of menu command listed 28 P2 4 A12 OSD pag...

Page 17: ...Model Title Date Rev ViewSonic Corporation 14 ViewSonic Corporation Confidential Do Not Copy VA702 b 4 DISASSEMBLY ASSEMBLY E E F F A A A A B D C E B B B C C C D D D D D D D E D C 1 Exploded Diagram ...

Page 18: ... 1 12 HW 00003161 502060401910 HINGE RIGHT LE1709 1 13 B 00003042 790411500000 PCBA KEYPAD BOARD LE1709 1 14 CB 00003162 430300100190 HRN ASS Y 1P 157mm BLACK UL1007 20 1 15 C 00003163 714020002400 ASSY BASE LE1709 1 16 C 00003164 501020203000 COVER HINGE LE1709 2 17 M 00003165 505040202000 INSULATOR MYLAR L79 7xW62 7mm CHASSIS L Chassis 1 18 HW 00003166 509412610500 SCREW B CROSS T T 4 10 BLK Bac...

Page 19: ...003161 502060401910 HINGE RIGHT LE1709 1 13 B 00003042 790411500000 PCBA KEYPAD BOARD LE1709 1 14 CB 00003162 430300100190 HRN ASS Y 1P 157mm BLACK UL1007 20 1 15 C 00003163 714020002400 ASSY BASE LE1709 1 16 C 00003164 501020203000 COVER HINGE LE1709 2 17 M 00003165 505040202000 INSULATOR MYLAR L79 7xW62 7mm CHASSIS L Chassis 1 18 HW 00003166 509412610500 SCREW B CROSS T T 4 10 BLK Back cover Bez...

Page 20: ...KEY 1 LED LENS 1 FRONT BEZEL G S 1 BACK COVER SUB ASS Y SUPPORT VESA 1 PLATE BASE 1 Rubber spacer 1 Logo 1 BACK COVER 1 BRACKET_R 1 GROUND WIRE 1 KEYPAD CABEL KEYPAD ASSM 1 SCREW PW CROSS M3 5 Ni 2 SCREW I CROSS M3 4 Zw 2 Ace tape 4 INL PANEL 1 BRACKET_R 1 SCREW PW CROSS M3 5 Ni 2 SCREW I CROSS M3 4 Zw 2 Ace tape 2 IF BOARD 1 POWER BOARD 1 FFC CABLE 1 CLIP WIRE 1 SCREW PW CROSS M3 5 Ni 5 BOLT 4 40...

Page 21: ...K COVER 1 BACK COVER SUB ASS Y LOGO PLATE ELLIPSE 1 Rubber 1 SUPPORT VESA 1 BRACKET_R 1 GROUND WIRE 1 KEYPAD CABEL 1 KEYPAD ASSM 1 SCREW PW CROSS M3 5 Ni 2 SCREW I CROSS M3 4 Zw 2 Ace tape 4 BACK COVER SUB ASS Y 1 HINGE RIGHT 1 HINGE LEFT 1 SCREW F CROSS T4 10 Ni 4 SCREW I CROSS M3 4 Zw 1 BEZEL SUB ASSM 1 ID LABEL 1 SCREW B CROSS T4 10 BLK 4 BASE SUB ASSM 1 OPENING STAND LABEL 1 HINGE COVER 2 SCRE...

Page 22: ...CTION Recall Contrast or Brightness while in the Contrast or Brightness adjustment or recall both of Contrast and Brightness when the OSD is not open 1 2 Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode 1 White Balance Not shown on user s guide 1 Power Lock 1 OSD Lock Remark All the short cuts function are only available while OSD off 3 OSD Control 3 1 OSD table Layer 1 Layer 2 L...

Page 23: ...bar indicating OSD Lock or Unlock is in progress and when complete it will indicate OSD Locked OSD Lock should not lock Power Button and Power Lock function 3 3 Power lock Menu function Power Lock Menu Function Check Item Method Phenomenon Activate Power Lock 1 10S Can not turn off the LCD Press the power button will appear Power Button Locked OSD 3s LCD would automatically turn back On when power...

Page 24: ...attern will self generate automatically Burn in patterns are full Red Green Blue White and Black You can not escape from Burn in pattern until plug in VGA Cable and then press the power key Turn the monitor off and then turn it on 5 Auto Color Automatically calibrate chip ADC parameter by using chip internal DAC If it is a new built set and it is first time to do the auto color please confirm the ...

Page 25: ... 1280x1024 60Hz 2 Set Pattern to 32 gray shades 3 Set contrast to the max The brightest 5 6 shades brightness cannot be distinguished Chroma Signal Generator Color Temperature 1 Do Auto color at 1280 x 1024 60Hz 32gray shades 2 Measure color temperature check it complies with the following temperature 5400K x 0 335 0 02 y 0 350 0 02 6500K x 0 313 0 02 y 0 329 0 02 9300K x 0 283 0 02 y 0 298 0 02 C...

Page 26: ...ast to default value 3 Do Auto Image Adjust 4 Shut down PC to check whether there s glitter on the center of the picture Equipment Chroma Signal Generator PC Power saving 1 Mode 1280x1024 60Hz 2 Pattern full white 3 Brightness Max 4 Contrast Default 5 Check power consumption at each modes State Power Consumption LED color Normal 38Ｗ Green Stand By 1Ｗ Orange Power Key Off 1Ｗ No Chroma signal genera...

Page 27: ...ttern z This LCM is analog interface So if the entire screen is an abnormal color that means the problem happen in the analog circuit part if only some scale appears abnormal color that stand the problem happen in the digital circuit part z If you check the H V position please use the crosshatch pattern z This LCM support more than 30 timing modes if the input timing mode is out of specification t...

Page 28: ...eck 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 25 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 29: ...ZD801 ZD802 ZD803 D803 D805 Check Q801 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 IC801 about 1V Check C815 D806 R812 Check R809 R814 END 26 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 30: ...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 27 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 31: ...ED Green Yes Yes Yes Backlight cannot be turned on No Check power supply No Is R526 Ok Check I F board Yes R526 open No Yes No Is Ok IC501 Yes U501 U502 fail No IC501 fail Yes Is ok T501 T502 T501 T502 fail No Connecting the output connector again No Check protected circuit Q501 Q502 Q503 Q504 Yes Yes END Is there 14Vdc voltage on pin13 of IC501 Yes 28 Do Not Copy VA702 b ViewSonic Corporation Con...

Page 32: ...6 Black Screen and backlight turn on 29 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 33: ...VLCD is 5V Check Panel Enable of U105 pin2 is low LVDS Cable NG Check the HWRESET of U104 exists Check RP101 Check the pins of U105 END OK NG OK NG OK OK NG OK NG NG Check LVDS signals OK Panel Fail NG Check Q101 Q102 Q107 R103 30 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 34: ...C168 Check ALE RDZ WRZ AD0 AD1 AD2 AD3 HWRESET Check the pins of U104 and U105 LVDS Cable Reinsert Change LVDS Cable Check Crystal pin20 21 of U105 and pin 33 34 of U104 Check the communication of U104 and U105 OK NG OK NG NG OK NG OK 31 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 35: ...01020202900 50 8 Cables CABLE D SUB 15P MALE 6FT BLACK BLUE SZ40 CB 00003047 453010100100 100 9 Electronic Components LCD PANEL 17 MT170EN01 V1 INNOLUX E 00003048 631102070270 100 10 BAG PLASTIC L550xW450xT0 05mm LE1709 P 00003049 506120004300 200 11 CARTON VA702 LE1709 P 00003050 506020006800 100 12 CUSHION EPS L LE1709 P 00003051 506040005500 100 13 CUSHION EPS R LE1709 P 00003052 506040005510 2...

Page 36: ...9 C 00003046 501020202900 50 8 Cables CABLE D SUB 15P MALE 6FT BLACK BLUE SZ40 CB 00003047 453010100100 100 9 Electronic Components LCD PANEL 17 MT170EN01 V1 INNOLUX E 00003048 631102070270 100 10 CUSHION EPS L LE1709 P 00003051 506040005500 100 11 CUSHION EPS R LE1709 P 00003052 506040005510 200 12 BAG PLASTIC L550xW450xT0 05mm LE1709 P 00003049 506120004300 200 13 CARTON VA702B LE1709 P 00003056...

Page 37: ...T SILVER VA702 LE1709 1 PC 29 N A 501030201900 BUTTON FUNCTION KEY LE1709 1 PC 30 N A 501120101200 LENS LE1709 1 PC 31 N A 506102000400 LOGO PLATE VIEWSONIC LE1709 THREE BIRDS 1 PC 32 N A 506102000300 LOGO PLATE VIEWSONIC LE1709 1 PC 33 N A 714050002400 ASSY BACK COVER LE1709 1 PC 34 C 00003046 501020202900 COVER BACK LE1709 1 PC 35 N A 502080300300 SUPPORT VESA LE1709 1 PC 36 N A 506102000500 LOG...

Page 38: ...50V K C115 C116 C117 C121 C122 6 PC 39 N A C123 40 N A 419311020060 C SMD 0603 X7R 1000PF 50V K C156 C157 C158 C159 C160 5 PC 41 N A 419341064650 C SMD 1206 Y5V 10uF 16V Z C128 C134 C138 C140 C142 8 PC 42 N A C144 C148 C150 43 N A 419311040060 C SMD 0603 X7R 0 1uF 50V K C102 C104 C107 C108 C110 28 PC 44 N A C111 C114 C124 C127 C129 45 N A C130 C131 C132 C133 C135 46 N A C136 C137 C139 C141 C143 47...

Page 39: ...414908330110 RES SMD 0805 3 3KO F RT R818 1 PC 122 N A 123 N A 414908068950 RES SMD 0805 6 8O J RT R812 R816 2 PC 124 N A 125 N A 414916510210 RES SMD 0603 51KO F RT R811 1 PC 126 N A 127 N A 414908120210 RES SMD 0805 12K F RT R817 1 PC 128 N A 129 N A 414904010050 RES SMD 1206 10O J RT R802 R806 2 PC 130 N A 131 N A 414916330410 RES SMD 0603 3 3M F RT R527 1 PC 132 N A 133 N A 414916010410 RES SM...

Page 40: ... 210 N A 790411450600 PCBA PWR INV B AI A LE1X09 XA 0 VER A A 211 N A 415130680540 RES CF 1 2W 68O J AT R804 1 PC 212 N A 415340101540 RES MOF 1W 100O J AT MINI R828 1 PC 213 N A 414870305540 RES MG HV 1 2Ws 3MO 3KV J AT R501 R503 2 PC 214 N A 411020052020 DIO A02 200V 1A R1 FEC D806 1 PC 215 N A 411020059440 DIO TA10 02 1A 200V DO 41 TJZH 1 PC 216 N A 411022003210 DIO 1N4148 75V 0 2A AT PHIL D809...

Page 41: ...TION KEY LE1709 1 PC 29 N A 501120101200 LENS LE1709 1 PC 30 N A 506102000400 LOGO PLATE VIEWSONIC LE1709 THREE BIRDS 1 PC 31 N A 506102000300 LOGO PLATE VIEWSONIC LE1709 1 PC 32 N A 714050002400 ASSY BACK COVER LE1709 1 PC 33 C 00003046 501020202900 COVER BACK LE1709 1 PC 34 N A 502080300300 SUPPORT VESA LE1709 1 PC 35 N A 506102000500 LOGO PLATE VIEWSONIC LE1709 ELLIPSE 1 PC 36 N A 714020002400 ...

Page 42: ...50V K C115 C116 C117 C121 C122 6 PC 39 N A C123 40 N A 419311020060 C SMD 0603 X7R 1000PF 50V K C156 C157 C158 C159 C160 5 PC 41 N A 419341064650 C SMD 1206 Y5V 10uF 16V Z C128 C134 C138 C140 C142 8 PC 42 N A C144 C148 C150 43 N A 419311040060 C SMD 0603 X7R 0 1uF 50V K C102 C104 C107 C108 C110 28 PC 44 N A C111 C114 C124 C127 C129 45 N A C130 C131 C132 C133 C135 46 N A C136 C137 C139 C141 C143 47...

Page 43: ...414908330110 RES SMD 0805 3 3KO F RT R818 1 PC 122 N A 123 N A 414908068950 RES SMD 0805 6 8O J RT R812 R816 2 PC 124 N A 125 N A 414916510210 RES SMD 0603 51KO F RT R811 1 PC 126 N A 127 N A 414908120210 RES SMD 0805 12K F RT R817 1 PC 128 N A 129 N A 414904010050 RES SMD 1206 10O J RT R802 R806 2 PC 130 N A 131 N A 414916330410 RES SMD 0603 3 3M F RT R527 1 PC 132 N A 133 N A 414916010410 RES SM...

Page 44: ... 210 N A 790411450600 PCBA PWR INV B AI A LE1X09 XA 0 VER A A 211 N A 415130680540 RES CF 1 2W 68O J AT R804 1 PC 212 N A 415340101540 RES MOF 1W 100O J AT MINI R828 1 PC 213 N A 414870305540 RES MG HV 1 2Ws 3MO 3KV J AT R501 R503 2 PC 214 N A 411020052020 DIO A02 200V 1A R1 FEC D806 1 PC 215 N A 411020059440 DIO TA10 02 1A 200V DO 41 TJZH 1 PC 216 N A 411022003210 DIO 1N4148 75V 0 2A AT PHIL D809...

Page 45: ...501 OZ9910G 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 NDRV2 PGND NDRV1 GNDA CT LCT DIM ENA VSEN CMP_SST ISEN V5000 VIN HSB PDRV1 PDRV2 C511 2 2uF 25V C508 22n 25V CN504 H L R528 182K 1 C532 0 1u 50V C527 5P 3KV 5V R519 1M 560Ω C524 10P 3KV C504 1n 50V C534 0 1u 50V OVP2 OP2 R513 510 1 C522 220uF 25V AUO Q505 2N7002 1 3 2 D510 1N4148W R511 U502 AOP605 1 2 3 4 5 6 7 8 S1 G1 S2 G2 D2 D2 D1 D1 U501 AOP60...

Page 46: ...4 9 1R 2W VCC5V CCFL_ENABLE VAA1 Q101 AP2301N G D S R106 10K VCC3 3 VCC5V U101 FS8860 18PJ 3 1 2 VIN ADJ VOUT C110 0 1 50V DIMMER1 U102 FS8860 33PJ 3 1 2 VIN ADJ VOUT C109 100uF 16V VCC5V PANEL_ENABLE VAA1 C113 1u 16V C103 100uF 16V C111 0 1 50V VAA4 Q107 PMBT3904 From Power Inverter ON OFF C105 100uF 16V NC R101 10K C104 0 1 50V VAA4 VAA3 VA702 b DC INPUT ViewSonic Document Number SIZE TITLE DATE...

Page 47: ...SN4148 R121 47 R110 100 R165 0 GNDR C167 NC R113 75 1 TVS105 5V6 R114 10K PC5V_VGA R107 100 R108 1K CN102 DZ11AA1 HW6 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 16 17 GNDG R116 22 R115 22 R168 0 R119 2K2 C120 220p 50V DDC_SCL_VGA VCC5V R112 75 1 R122 47 R127 100 DDC_SDA_VGA TVS102 BAV99 DET_VGA R166 0 RIN DDC_SCL_VGA R111 75 1 R167 0 C123 47n 25V GNDB HSI C121 47n 25V R117 22 DDC_SDA_VGA VSYNC TVS107 5V6...

Page 48: ..._LPLL AVSS_PLL AVSS_DVI GNDP GNDP GNDP GNDP GNDP GNDP GNDC GNDC GNDC GNDP GNDC XIN XOUT LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M NC LVB3P NC LVB3M NC LVBCKP NC LVBCKM NC LVB2P NC LVB2M NC LVB1P NC LVB1M NC LVB0P NC LVB0M DDC1_CLK GPO8 DDC1_DAT GPO7 AD0 GPO6 AD3 GPO5 AVDD_PLL AVDD AVSS AVSS_DVI LVACKP LVA3M LVA3P AVSS AD1 AD2 BUS TYPE NC CSZ SDA SCL HWRESETZ VPO C164 100p 50V PA2 PB7 PB3 PB5 PB2 R164 1K...

Page 49: ...RXEC RXE0 PA9 RXOC VLCD RXE1 VLCD RXO2 PB1 RXO2 RXO3 RXE1 RXOC RXO0 RXE1 RXO0 RXE3 PA0 PA1 PA3 RXE0 RXO1 VA702 b PANEL INTERFACE ViewSonic Document Number SIZE TITLE DATE SHEET OF Rev DRAWN BY CHECK BY APPRO BY CN104 DUPON2 0mm NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 PA7 RXO3 RXE3 RXE3 PB5 CN103 AL2309 A0G1Z 1 2 3 4 6 8 10 12 14 16 18 20 22 24 26 28 30 7 9 11 13 15 17 19 ...

Page 50: ...2 35 36 37 38 39 40 11 13 14 16 17 41 42 43 44 10 31 15 18 12 19 8 9 23 33 34 P4 2 P1 0 P1 1 P1 2 P1 3 P1 4 P1 5 X2 X1 VSS P2 0 P2 1 P2 2 P2 3 P2 4 P2 5 P2 6 PSEN EA P0 7 P0 6 P0 5 P0 4 P0 3 P3 0 RXD P3 1 TXD P3 2 INT0 P3 4 T0 P3 5 T1 P0 2 P0 1 P0 0 VDD RST P2 7 P3 3 INT1 P3 6 WR P4 3 INT2 P3 7 P1 6 PWM3 P1 7 PWM4 P4 0 ALE P4 1 R146 1K CCFL_ENABLE R134 10K C155 12p 50V R140 100 SCL RDZ R149 1K AD0...

Page 51: ...9 PCB Layout Main board Top layout 48 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 52: ...Main board bottom Layout 49 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 53: ...POWER board 50 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 54: ...51 Do Not Copy VA702 b ViewSonic Corporation Confidential ...

Page 55: ...uality Systems Processes marc maupin viewsonic com d o o G t n e l l e c x E Precautions and Safety Notices 1 8 Exploded Diagram and Exploded Parts List 7 Recommended Spare Parts List Adjustment Procedure 2 Specification 5 4 Circuit Description 3 6 Troubleshooting Flow Chart Front Panel Function Control Description 9 Block Diagram 10 Schematic Diagrams 11 PCB Layout Diagrams 52 ViewSonic Corporati...

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