ViewSonic VA902-3 Page 5 Service Manual Download

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ViewSonic Corporation

Confidential - Do Not Copy

VA902-3_VA902b-3

The LCD module should be supplied by power complied with requirements of Limited
Power Source (IEC60950 or UL1950), or be applied exemption.

(14) The LCD module is designed so that the CFL in it is supplied by Limited Current

Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit.

5.2. Handling and Placing Methods

Correct Methods:

Incorrect Methods:

Only touch the metal frame of the LCD panel
or the front cover of the monitor. Do not touch
the surface of the polarizer.

Surface of the LCD panel is pressed by fingers
and that may cause “Mura”

the monitor with cushions

Taking out the monitor by grasping the LCD
panel. That may cause “Mura”

Summary of Contents for VA902-3

Page 1: ...ViewSonic VA902 3 VA902b 3 Model No VS10715 19 Color TFT LCD Display VA902 3_VA902b 3_SM Rev 1a Jun 2006 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 Service Manual ...

Page 2: ...ther expressed or implied with respect to the contents hereof 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 Opt quest is a registere...

Page 3: ...ty Notices 1 2 Specification 4 3 Front Panel Function Control Description 7 4 Circuit Description 14 5 Adjustment Procedure 18 6 Troubleshooting Flow Chart 40 7 Recommended Spare Parts List 43 8 Exploded Diagram and Exploded Parts List 53 9 Block Diagram 58 10 Schematic Diagrams 59 11 PCB Layout Diagrams 67 ...

Page 4: ...ns 5 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 inserting or disconnecting from input connector 3 Wipe off water drop immediately Long contact with water may cause discoloration or spots 4 When the panel surface is soiled wipe it with absorbent cotton or other soft cloth 5 Since the panel is made of glass...

Page 5: ...supplied by Limited Current Circuit IEC60950 or UL1950 Do not connect the CFL in Hazardous Voltage Circuit 5 2 Handling and Placing Methods Correct Methods Incorrect Methods Only touch the metal frame of the LCD panel or the front cover of the monitor Do not touch the surface of the polarizer Surface of the LCD panel is pressed by fingers and that may cause Mura the monitor with cushions Taking ou...

Page 6: ... Do Not Copy VA902 3_VA902b 3 3 Place the monitor on a clean and soft foam pad Placing the monitor on foreign objects That could scratch the surface of the panel or cause Mura The panel is placed facedown on the lap That may cause Mura ...

Page 7: ...rizontal Frequency 30 80 KHz Vertical Refresh Rate 50 75 Hz For resolution 1280 x 1024 the vertical Refresh rate up to 75 Hz for there rest Resolutions the vertical refresh rate up To 75Hz Maximum Pixel Clock 135 MHz Sync Polarity Independent of sync polarity Timing Table Item Timing Analog 1 640 x 350 70Hz 31 5kHz Yes 2 640 x 400 60Hz 31 5kHz Yes 3 640 x 400 70Hz 31 5kHz Yes 4 640 x 480 50Hz 24 7...

Page 8: ...cklight Life 40 000 Hours minimum Panel Performance Luminance Condition CT 6500K Contrast Max Brightness Max 250 cd m2 typ after 30 minute warm up Brightness Uniformity 80 Entire Area Typ Contrast Ratio 600 1 typ 450 1 minimum Color Depth 16 2M colors 6 bits 2 bits FRC Viewing Angle Horizontal 140 degrees CR 10 Viewing Angle Vertical 130 degrees CR 10 Response Time 10 90 Ta 25 C 8ms Typ Source2 Pa...

Page 9: ...M Tilt Down 5 degrees Package Specifications Width 490 mm Height 570 mm Depth 145 mm Gross Weight 6 8kg 14 96lb 7 Environmental Environmental Conditions Operating Temperature 0 C to 40 C Storage Temperature 20 C to 60 C Operating Relative Humidity 10 to 90 RH Non Condensing Storage Relative Humidity 5 to 90 RH Non Condensing Operating Altitude 0 to 3 000 meters Storage Altitude 0 to 12 000 meters ...

Page 10: ... through menu options and adjusts the displayed control Also a shortcut to display the Contrast adjustment control screen Power On Off Displays the control screen for the highlighted control Also toggles between two controls on some screens Also a shortcut to Auto Image Adjust Power light Green ON Orange Power Saving Displays the Main Menu or exits the control screen and saves adjustments ...

Page 11: ...he menu press button 1 twice The following tips may help you optimize your display Adjust your computer s graphic card so that it outputs a video signal 1280 x 1024 60 Hz to the LCDdislay Look for instructions on changing the refresh rate in your graphic card s user guide If necessary make small adjustments using H POSITION and V POSITION until the screen image is completely visible NOTE All OnVie...

Page 12: ...provides several color options preset color temperatures and User which allows you to adjust red R green G and blue B The factory setting for this product is 6500K 6500 Kelvin 6500K Adds red to the screen image for warmer white and richer red Default setting 9300K Adds blue to the screen image for cooler white used in most office settings with fluorescent lighting sRGB sRGB is quickly becoming the...

Page 13: ... dislay H V Position adjusts horizontal and vertical position of the screen image You can toggle between Horizontal and Vertical by pressing button 2 Horizontal moves the screen image to the left or to the right Vertical moves the screen image up and down Image Adjust The Image Adjust controls are explained below Image Adjust 1 EXIT 2 SELECT H V Position H Size Fine Tune Sharpness 1 To select colo...

Page 14: ... Setup Menu controls are explained below OSD Position allows you to move the on screen display menus and control screens OSD Timeout sets the length of time an on screen display screen is displayed For example with a 15 second setting if a control is not pushed within 15 seconds the display screen disappears Resolution Notice advises the optimal resolution to use Language Select allows you to choo...

Page 15: ...isted in this user guide Control Explanation OSD Background allows you to turn the On Screen display background on or off This means that while making adjustments from the OSD control screens you can also view open software applications or the Windows desktop OSD ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 12 ...

Page 16: ...push button 2 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 Keep pushing 5 sec White Balance 1 Power Lock 1 OSD Lock ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 13 ...

Page 17: ...r Input w 5V tolerant Hardware reset active high 5 INT Output CPU interrupt 4mA driving strength 27 AD3 I O w 5V tolerant DDR direct bus AD3 4mA driving strength 4 AD2 I O w 5V tolerant DDR direct bus AD2 4mA driving strength 1 AD1 I O w 5V tolerant DDR direct bus AD1 4mA driving strength 2 AD0 I O w 5V tolerant DDR direct bus AD0 4mA driving strength 3 ALE I w 5V tolerant DDR direct bus ALE activ...

Page 18: ...ferential Data Output 43 LVBCKM Output B Link Negative LVDS Differential Clock Output 46 LVBCKP Output B Link Positive LVDS Differential Clock Output 45 GPO Interface Pin Name Pin Type Function Pin PWM1 Output PWM1 4mA driving strength 29 PWM0 Output PWM0 4mA driving strength 28 Misc Interface Pin Name Pin Type Function Pin XIN Crystal Oscillator Input Xin 6 XOUT Crystal Oscillator Output Xout 7 V...

Page 19: ...A TBD C W Thermal Resistance Junction to Case Natural Conversion θJC TBD C W Note Stress above those listed under Absolute Maximum Rating may cause permanent damage to those indicated in the stress rating only functional operation of the device at these or any other conditions outside of those indicated in the operation sections of this specification is not implied Exposure to absolute maximum rat...

Page 20: ...ction It needs an external pull up resistor when driving heavy load device There is an internal pull up resistance on each CMOS PAD and an internal pull down resistance on each input Low Power Reset LVR Watchdog Timer When the voltage level of power supply is below 2 4V 0 4V for a specific period of time the LVR generates a chip reset signal After the power supply is above 2 4V 0 4V INVERTER In or...

Page 21: ...97kHz V 75Hz 1 4 Test Display Modes Pattern 1 4 1 Compatible Modes Item Timing 1 640 x 350 70Hz 31 5kHz 2 640 x 400 60Hz 31 5kHz 3 640 x 400 70Hz 31 5kHz 4 640 x 480 50Hz 24 7kHz 5 640 x 480 60Hz 31 5kHz 6 640 x 480 67Hz 35 0kHz 7 640 x 480 72Hz 37 9kHz 8 640 x 480 75Hz 37 5kHz 9 640 x 480 85Hz 43 27kHz 10 720 x 400 70Hz 31 5kHz 11 800 x 600 56Hz 35 1kHz 12 800 x 600 60Hz 37 9kHz 13 800 x 600 75Hz...

Page 22: ...erformance RGB Color Intensities Contrast of each R G B color should be normal Figure 4 5 6 5 Screen Uniformity Flicker Full White Should be compliant with the spec Figure 7 6 Dead Pixel Line White Screen Dark Screen The numbers of dead pixels should be compliant with the spec Figure 7 8 7 White Balance White Black Pattern The screen must have the pure white and black pattern no other color Figure...

Page 23: ...or Function Controls first This action will allow you to erase all end user s settings and restore the factory defaults 1 5 2 Auto Image Adjust Please select and enter Auto Image Adjust function on Main Menu to see if it is workable The Auto Image Adjust function is aimed to offer a better screen quality by built in ASIC For optimum screen quality the user has to adjust each function manually View...

Page 24: ...1024 60Hz Test Pattern Horizontal Vertical Line Thickness Pattern Check and see if the image boundary is within the screen frame If not readjust by the following steps a Select and enter Manual Image Adjust function on OSD Main Menu b Then select and enter Horizontal Size or Horizontal Vertical Position function to adjust the video boundary to be full scanned and within screen frame 1 5 7 White Ba...

Page 25: ...o 5400K press key x 0 332 0 02 y 0 348 0 02 7 Press key go back to Fig 2 Then press key return to Fig 1 Power key OFF ON quit factory mode G Color Temperature Luminance Verify BRIGHTNESS MAX CONTRAST MAX 9300K x 0 283 0 02 y 0 298 0 02 6500K x 0 313 0 02 y 0 329 0 02 5400K x 0 332 0 02 y 0 348 0 02 1 5 8 R G B Colors Contrast Test Signal 1280 1024 60Hz Test Pattern R G B Color Intensities Pattern ...

Page 26: ...800 600 60HZ 70HZ 75HZ 832 624 75Hz 1024 768 60HZ 70HZ 75HZ 1280 1024 60 75Hz Normally when the primary mode 1280 1024 60Hz is well adjusted and compliant with the specification the secondary display modes will be great possible to be compliant with the spec But we still have to check with the general test pattern to make sure every secondary is compliant with the specification 1 5 14 All Modes Re...

Page 27: ...g procedures to upgrade it to the latest version 2 1 Equipment Needed VA902 b 3 Monitor Fixture for Firmware Upgrade VGA Cable PC Personal Computer LPT Cable Firmware Upgrade Program One additional monitor for checking the program execution PC VGA Cable Printer Port LPT Cable VA902 b 3 ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 24 ...

Page 28: ...ure with VA902 b 3 Monitor by VGA Cable 2 2 4 Connect Power Cord to VA902 b 3 Monitor 2 2 5 Connect PC to the additional monitor 2 3 ISP Download program procedure 2 3 1 Hardware Connect status 2 3 2 Down load isp program Step 1 Execute ISP exe ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 25 ...

Page 29: ...t need to be selected the MTV512GM64 for this project Then press the Create Security File Button to enter step 3 Step 3 Create Security File Enter the three string into the blank like fig 2 Then press OK Button ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 26 ...

Page 30: ...he Load MCU File button to select the file will be download hex Step 5 Run Pressing the Run Button to start download program Press OK button to Enter ISP mode ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 27 ...

Page 31: ...ISP status and Monitor Turn off the power of monitor AC plug off and disconnect the D Sub connector To connect the D Sub connector and then turn on the power of monitor AC plug on If the test result shows passed it means the connection is well If not failed it means the connection has problems Then you need to check the setup procedure or reboot the PC or simply use another PC to do the firmware u...

Page 32: ...in 2 If you find the DDC does not conform to the monitor you have to do the DDC key in 3 1 Equipment Needed VA902 b 3 Monitor DDC Card PC RS232 cable Barcode Reader VGA Cable VA902 b 3 DDC Card PC RS 232 Cable VGA Cable Barcode Reader ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 29 ...

Page 33: ... 3 2 3 Connect RS 232 Cable and VA902 3 with VGA Cable when key in DVI DDC information use VGA transform to DVI port 3 2 4 Connect Power Cord to VA902 3 Monitor 3 3 DDC Key In Procedure 3 3 1 Run DDC exe 3 3 2 Choose model number and conform the Time then Press ENTER key ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 30 ...

Page 34: ...e PIC choose DDC Card Press ALT 2 Enter DDC 2B test interface 3 3 4 Press F8 to choose corresponding model DAT VA902 3 DAT press ENTER key Choose DDC Card ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 31 ...

Page 35: ...s F9 enter the download interface 3 3 6 Key in the serial number or use the barcode reader to scan the barcode of the monitor and press ENTER key ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 32 ...

Page 36: ...l picture is as follows Compare EDID OK Press any key to continue 3 3 8 Let VA902 3 active then see the information in OSD it shows Serial NO PPZ0517A3178 ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 33 ...

Page 37: ...Sonic EDID Editor Connect the VA902 3 to PC with VGA Cable Excute the EDID Editor then Press Ctrl F5 If the DDC is correct you can see the information as follow ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 34 ...

Page 38: ...r in the PE bag and seal the bag with tape Figure 2 1 3 Put the cushions on the monitor Figure 3 1 4 Place the monitor into the carton and then put all the accessories into the carton At last close the carton and seal it with tape Figure 4 Figure 4 Figure 3 Figure 1 Figure 2 User s Guide Power Cord ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 35 ...

Page 39: ...e 1 Disassembly of Stand unit from Monitor 1 1 Remove two Hinge Cover 1 2 Unscrew four screws that secure Stand Unit 1 3 Detach Stand Unit from the monitor ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 36 ...

Page 40: ...mbly of Front Cover and Rear Cover 2 1 Unscrew two screws that secure Rear Cover to remove Front Cover 2 2 Unscrew 2 screws to remove Rear Cover ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 37 ...

Page 41: ...nge 3 2 Unscrew 2 screws to remove Shielding Plate 3 3 Unscrew 2 screws and disconnect the connector to remove VGA Cable 3 4 Unscrew 7 screws and disconnect the wires to remove Main Board Hinge Shielding Plate VGA Cable Main Board ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 38 ...

Page 42: ...anel Unit facedown and unscrew 4 screws on its right and left sides to remove Panel Unit and Keypad Board Panel Bracket Keypad Board Panel Unit ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 39 ...

Page 43: ...2b 3 40 6 Troubleshooting Flow Chart START CHECK MAIN BOARD 5V OK 3 3V OK 1 8V OK Y Y CHECK POWER OARD OK CHECK I102 AND ROUND CAP OK N CHECK I104 SUROUND CAP BEAD OK CHECK I104 3 3V UROUND CAP OK N CHECK I103 SUROUND CAP BEAD OK CHECK I103 1 8V UROUND CAP OK N ...

Page 44: ... T902 Y MAIN BOARD 5V 12V CHECK VCC5V OK CHECK PIN40 D807 I801 I801 3 3 V N CHECK OK CHECK PIN18 OK D807 I801 I801 CHECK PIN14 PIN15 CLOCK OK Y CHECK D109 D110 D112 Y CHECK X101 C126 C127 OK Y CHECK TRACE RP04 RP05 OK L804 D823 D822 I102 12 MHZ D807 I801 I801 CHECK I102 EVERY TWO PIN SHORT Y CHECK KEYPAD P103 OK CHECK RESET N CHECK C123 R125 D107 N N N N ViewSonic Corporation Confidential Do Not C...

Page 45: ...1 Check HS VS SCL SDA Check N Check N N I105 SCL SDA I102 SCL SDA HWRESET Check BACKLITE Check Q102 Check N Check N N PANEL P102 WIRE I101 Some bits lost Check Pin102 128 Y I108 or R pack soldering N I107 poor soldering I106 poor soldering N P105 poor soldering Lose color R or G or B Check P102 Pin 8 10 12 Y Check Sign Cable N Check C115 118 122 C117 121 124 Check L101 102 103 R112 115 119 N I108 ...

Page 46: ...ion PC Board Assembly Description Description Electronic Components ViewSonic Model Number VS10715 Serial No Prefix QAL Rev 1a Item ECR ECN N A Ref P N Location Universal number Q ty 1 Accessories AC POWER CORD USA WALL 1 83M BLACK A 00005362 2427130046P P951 1 2 PCB ASS Y BLOCK CON B 00003004 6202 7998908101 1 3 PCB ASS Y BLOCK MAIN B 00005836 6201 7998909151 1 4 BEZEL ASS Y ABS 94HB MIDNIGHT GRA...

Page 47: ...YETHY BAG 135X250X0 03T mm LDPE VSC LCD 6P85 1 54 N A 2072253903P HEAT SINK JT178DP SPTE T 1MM 9H01 1 55 N A 2072261500P HEAT SINK JT178DP 40L 35W 20H AL T 3 9H02 1 56 N A 2072261401P HEAT SINK JT178QP AL6063S 75 30 20 15 9H03 1 57 N A 2072261900P HEAT SINK JT198QP SPTE 0 8t 18x11X43 9H04 1 58 N A 2105251400P SPRING PLATE SPTE T 0 4MM GROUND PLATE 9H11 1 59 N A 2105251400P SPRING PLATE SPTE T 0 4M...

Page 48: ...2KBP06M 600V 2A PEC D801 1 158 N A 2363231995P DIODE RECT UF4007 DO 41 1000V 1A PEC D806 1 159 N A 2363230795P DIODE RECT 1H5G TG WS R 1 WILLAS D807 1 160 E D 0403 0254 2363507995P DIODE ZENER MTZJ22B 20 64 21 71V ROHM D808 1 161 E D 0403 0531 2363600195P DIODE SWITCH 1N4148 DO 35 WILLAS D809 1 162 E D 0403 1532 2363505995P DIODE ZENER HZ12A2 TA E DO 35 RENESAS D810 1 163 E D 0403 0531 2363600195P...

Page 49: ...891P FET N CH 2N7000TA TO 92 FAIRCHILD Q907 1 274 N A 2361609891P FET N CH 2N7000TA TO 92 FAIRCHILD Q908 1 275 N A 2361609891P FET N CH 2N7000TA TO 92 FAIRCHILD Q909 1 276 N A 2361609891P FET N CH 2N7000TA TO 92 FAIRCHILD Q910 1 277 N A 2360609596P FET N CH SMD AP9977GM SO 8 APEC Q911 1 278 E R 0405 2776 2239207505P RES PRE 1 4 S RN 1 4WS 75 00 F T52 MINI R101 1 279 E R 0405 2776 2239207505P RES P...

Page 50: ...21 1 371 N A 2233451595P RES CBN 1 4 S RD 1 4WS 5 1Mohm J T R922 1 372 N A 2239211035P RES PRE 1 4 S RN 1 4WS 110Kohm F T52 R923 1 373 E R 0405 3213 2233410595P RES CBN 1 4 S RD 1 4WS 1 0Mohm J T52 R924 1 374 N A 2242315595P HIGH VOLTAGE RESISTOR RD 1 2W 1 5Mohm J T52 R925 1 375 N A 2239291025P RES PRE 1 4 S RN 1 4WS 91 0Kohm F T52 R926 1 376 E R 0405 0727 2239222015P RES PRE 1 4 S RN 1 4WS 2 2Koh...

Page 51: ...2B 3 VS10715 HSD TCO03 6P50 1 48 M MS 0808 1317 2013053000P POLYETHY BAG 90CMX75CMX0 02t PE LD 6P60 1 49 DC 00005835 2438570017P CD OWNER GUIDE VA902B 3 WIZARD VS10715 HSD 6P80 1 50 DC 00005834 2002370022P GUARANT CARD VIEWSONIC VA902 3 QSG 6P84 1 51 N A 2013228806P POLYETHY BAG 135X250X0 03T mm LDPE VSC LCD 6P85 1 52 N A 2072253903P HEAT SINK JT178DP SPTE T 1MM 9H01 1 53 N A 2072261500P HEAT SINK...

Page 52: ...AS D101 1 144 E D 0403 0531 2363600195P DIODE SWITCH 1N4148 DO 35 WILLAS D102 1 145 E D 0403 0531 2363600195P DIODE SWITCH 1N4148 DO 35 WILLAS D103 1 146 E D 0403 0531 2363600195P DIODE SWITCH 1N4148 DO 35 WILLAS D104 1 147 E D 0403 0531 2363600195P DIODE SWITCH 1N4148 DO 35 WILLAS D105 1 148 E D 0403 0531 2363600195P DIODE SWITCH 1N4148 DO 35 WILLAS D106 1 149 E D 0403 0531 2363600195P DIODE SWIT...

Page 53: ...P WIRE HARNESS 8 8P H B 1061 26 L 200mm P 2 0 P701 1 250 N A 2404380302P CONNECTOR 87210 0236 P 3 5 ACE OR EQUAL P901 1 251 N A 2404380302P CONNECTOR 87210 0236 P 3 5 ACE OR EQUAL P902 1 252 N A 2404380302P CONNECTOR 87210 0236 P 3 5 ACE OR EQUAL P903 1 253 N A 2404380302P CONNECTOR 87210 0236 P 3 5 ACE OR EQUAL P904 1 254 A 00005362 2427130046P AC POWER CORD USA WALL 1 83M BLACK P951 1 255 CB 000...

Page 54: ...3Kohm J T52 R842 1 344 E 00005137 2239233235P RES PRE 1 4 S RN 1 4WS 332Kohm F T52 R843 1 345 N A 2239261935P RES PRE 1 4 S RN 1 4WS 619Kohm F T52 R844 1 346 E R 0405 3235 2233410295P RES CBN 1 4 S RD 1 4WS 1Kohm J T52 R845 1 347 E R 0405 1171 2233482195P RES CBN 1 4 S RD 1 4WS 820 ohm J T52 R846 1 348 E R 0405 3235 2233410295P RES CBN 1 4 S RD 1 4WS 1Kohm J T52 R847 1 349 E R 0405 5980 2239210025...

Page 55: ...B 2 5 6 5 9V DO 35 HITACHI Z102 1 408 N A 2363516895P DIODE ZENER HZ6B 2 5 6 5 9V DO 35 HITACHI Z103 1 409 N A 2363516895P DIODE ZENER HZ6B 2 5 6 5 9V DO 35 HITACHI Z104 1 410 N A 2363516895P DIODE ZENER HZ6B 2 5 6 5 9V DO 35 HITACHI Z105 1 411 N A 2363516895P DIODE ZENER HZ6B 2 5 6 5 9V DO 35 HITACHI Z105 1 P model Item ViewSonic P N Ref P N Description Location Universal number Q ty 1 A 00003623...

Page 56: ...8 Exploded Diagram and Exploded Parts List ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 53 ...

Page 57: ...ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 54 ...

Page 58: ...T GRAY 1 12 2 N A 2022263501P CABI BACK VE910 ABS 94HB BLACK 4001 1 13 1 M MS 0808 9396 2051352202P NAME PLATE NAME PLATE VIEWSONIC E015 027 1 13 2 PL 00005399 2051352203P NAME PLATE V LOGO ABS 94HB BLACK C 1 14 HW 00003031 2071872900P BRACKET FIX JT198QP SECC 0 8T WALL MOUNT 1 15 HW 00003032 2106657000P HINGE VE910 5 20 90 1 16 M SCW 0824 0851 2082340072P SCREW CSK SCREW CSK M4 7 4 17 M SCW 0824 ...

Page 59: ...NAME PLATE VIEWSONIC E015 027 1 13 2 PL 00005399 2051352203P NAME PLATE V LOGO ABS 94HB BLACK C 1 14 HW 00003031 2071872900P BRACKET FIX JT198QP SECC 0 8T WALL MOUNT 1 15 HW 00003032 2106657000P HINGE VE910 5 20 90 1 16 M SCW 0824 0851 2082340072P SCREW CSK SCREW CSK M4 7 4 17 M SCW 0824 0123 2084740102P SCREW BND T M4X10 BND T 1 18 M SCW 0824 6944 2084740124P SCREW BND T M4X12 BND T BLK 2 19 M SC...

Page 60: ...49P LABEL P 1 10 N A 2055613477P LABEL 1 PACKING PART LIST VA902 3 Item ViewSonic P N Ref P N Description Q ty 1 N A VA902b 3 monitor 1 2 M MS 0808 1317 2013053000P POLYETHY BAG 1 3 P 00003014 2012179800P POLYFOAM L 1 4 P 00003015 2012179900P POLYFOAM R 1 5 DC 00005835 2438570017P CD OWNER GUIDE 1 6 DC 00005834 2002370022P GUARANT CARD QSG 1 7 A 00005362 2427130046P AC POWER CORD M 1 7 A 00003623 ...

Page 61: ...gram AC INPUT 100V 200V SW POWER SUPPLY I801 12V D822 D823 T801 5V INVERTER I901 PANEL DISPLAY VLCD Q102 D919 D910 Q901 3 3V I104 X101 1 8V I103 SCALAR I101 SYNC R111 R113 R G B INPUT MCU I102 DDC 3 3V MCU D109 D110 D112 H V SYNC VGA D SUB P101 SCL SDA VGA 5V EEPROM I105 OSC X101 ...

Page 62: ...2 3_VA902b 3 10 Schematic Diagrams TO 263 3v3 add heat piece SOT 223 VCC_1v8 VCC5V 5 6 VCC_3v3 I103 AP1117T18 3 2 1 VI VO GND R139 1w1ohm C148 NC C145 NC C141 100uF 16V C144 100uF 16V I104 AP1084T33 3 2 1 VI VO GND VCC_3v3 3 4 6 VCC_1v8 4 10 1 DC DC 59 ...

Page 63: ...7uF R105 47 Z103 5 6V D105 1N4148 R102 75 R110 2 2K R107 47 C105 0 047uF R109 47 R111 75 D101 1N4148 P101 JST PH13P 2 0 90 1 2 3 4 5 6 7 8 9 10 11 12 13 DDC SCL DDC SDA VGA VS VGA HS GND 5V B GND B G GND G R GND R GND D104 1N4148 R104 47 C101 0 047uF R103 75 C104 0 047uF C102 0 047uF Z102 5 6V Z104 5 6V R115 100 Z101 5 6V R106 47 C107 33pF C108 220pF Z105 5 6V PC5V 6 10 2 VGA INPUT ViewSonic Corpo...

Page 64: ...43 44 45 46 47 48 49 50 51 52 3 4 20 35 34 33 2 1 54 32 RINP GINP SOGIN0 BINP RINM GINM BINM HSYNC VSYNC REXT REFP REFM ALE WRZ RDZ HWRESET INT PWM0 PWM1 LVACKM AVDD VDDP VDDP VDDC GND GND GND GND XIN XOUT LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M LVB3P LVB3M LVBCKP LVBCKM LVB2P LVB2M LVB1P LVB1M LVB0P LVB0M AD0 AD3 AVDD LVACKP LVA3M LVA3P AD1 AD2 VCTRL VDDC C119 0 1uF R117 10K C112 47uF 16V C109 0 1uF ...

Page 65: ...KM PB3 LVA3M PA1 PB 0 9 LVB1M PB7 LVA1M PA7 PA 0 9 4 PB 0 9 4 onPANEL 6 VCC5V VLCD VLCD Q102 AP2305 C136 1u 50V D111 NC P102 BL106 30RL A 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 VLED VLED VLED OPTION OPTION OPTION GND RXO3 RXO3 RXOC RXOC RXO2 RXO2 GND RXO1 RXO1 GND RXO0 RXO0 RXE3 RXE3 RXEC RXEC GND RXE2 RXE2 RXE1 RXE1 RXE0 REX0 R123 4 7K R119 NC R1...

Page 66: ... R177 NC RP02 10K 1 2 3 4 5 6 7 8 C131 NC C132 NC RP06 2K7 1 2 3 4 5 6 7 8 I102 CS8954 PDIP40 1 2 3 4 5 6 7 8 17 18 19 20 21 22 23 24 25 26 27 28 32 33 34 35 36 9 10 11 12 13 14 15 16 37 38 39 40 30 29 31 P5 0 DA0 P5 1 DA1 P5 2 DA2 P5 3 DA3 P5 4 DA4 P5 5 DA5 HSCL2 P5 6 HSDA2 P5 7 P7 7 X2 X1 GND P6 0 AD0 P6 1 AD1 P6 2 AD2 P6 3 AD3 P6 4 P6 5 P6 6 CLKO P6 7 P1 7 P1 6 P1 5 P1 4 P1 3 RST HSCL1 RXD0 P3 ...

Page 67: ...S705 SW 1 2 S701 SW 1 2 P701 JST PH8P 2 0 180 8 7 6 5 4 3 2 1 LCD_ONOFF LED_AMBER LED_GREEN GND MENU UP DOWN 2_SELECT S702 SW 1 2 D701 LED 2 3 1 S704 SW 1 2 10 6 KEY PAD ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 64 ...

Page 68: ... 91K 1 C826 4700PF DIP L801 BEAD C811 1000P DIP D808 27V 3 3V 22 2V 5V R825 11 8K 1 R821 10 1 2W C815 4 7U 50V L808 0 5X3T C809 10uF 50V R809 47R 1206 R823 1K DIP D821 SRF10120 R834 100K 1 4WS C807 0 1UF R833 100K 1 4WS C803 4700pF R836 100K 1 4WS L804 JUMPER R835 100K 1 4WS C831 4700PF R806 511K 1206 R852 10R 1 4WS D810 NC C808 180P DIP R803 1M 1 4WS L807 OPEN R807 39 1206 D809 1N4148 R812 1M 1 4...

Page 69: ...SEN ISEN D913 1N4148 D909 SB140 L901 BEAD R929 51 1K 1 D919 1N4148 AP9977GM Q911 1 2 3 4 5 6 7 8 D902 1N4148 R903 NC D906 1N4148 D901 1N4148 C911 68nF C915 33uF 25V R918 1M R914 681 1 C910 0 1uF C928 0 1uF D910 1N4148 I902 78L05 2 3 1 IN OUT GND C925 0 1uF R915 JUMPER D903 1N4148 D912 1N4148 C927 1000P C913 330P C926 1000P C912 27P R908 10K R916 JUMPER D917 1N4148 Q907 2N7000 DIP SGD AP9977GM Q905...

Page 70: ...ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 11 PCB Layout Diagrams 11 1 MAIN PCB TOP VIEW 67 ...

Page 71: ...11 2 MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 68 ...

Page 72: ...11 3 CON PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 69 ...

Page 73: ...11 4 CON PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy VA902 3_VA902b 3 70 ...

Page 74: ...4 Circuit Description 5 Adjustment Procedure 6 Troubleshooting Flow Chart 7 Recommended Spare Parts List 8 Exploded Diagram and Exploded Parts List 9 Block Diagrams 10 Schematic Diagrams 11 PCB Layout Diagrams B Are you satisfied with this Service Manual Item Excellent Good Fair Bad 1 Service Manual Content 2 Service Manual Layout 3 The form and listing C Do you have any other opinions or suggesti...

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ViewSonic VA902-3, Service Manual

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Summary of Contents for VA902-3

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