ViewSonic vx912-1 Service Manual Download Page 6

Page: 6 / 70

Correct methods :

Incorrect Methods :

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

Surface of the panel is pressed by fingers & this may
cause “ MURA “

Take out the monitor with cushion

Take out the monitor by grasping the LCD panel.
That may cause “ MURA“.

ViewSonic

Corporation

nfidential

Not

Copy

VX912

Summary of Contents for vx912-1

Page 1: ...Model No VS10162 19 Color TFT LCD Display Service Manual ViewSonic VX912 1 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 VX912_SM_836 Rev 1a Oct 2004 ...

Page 2: ...ally 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 used within this...

Page 3: ... Trouble Shooting Flow Chart 9 Block Diagram 10 Schematic Diagrams 7 Recommended Spare Parts List 1 Precautions and Safety Notices 5 Adjusting Procedure 8 Exploded Diagram And Spare Parts List 11 PCB Layout Diagrams 1 5 9 15 25 43 45 47 57 60 66 ii ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 4: ...ause 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 inserting or disconnecting from input connector 3 Wipe off water drop immediately Long contact wi...

Page 5: ...cent lamp in LCD contains a small amount of mercury Please follow local ordinances or regulations for disposal 13 Small amount of materials having no flammability grade is used in the LCD module 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 L...

Page 6: ...ont cover of the monitor Do not touch the surface of the polarizer Surface of the panel is pressed by fingers this may cause MURA Take out the monitor with cushion Take out the monitor by grasping the LCD panel That may cause MURA 3 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 7: ...rect Methods Incorrect Methods Place the monitor on a clean soft foam pad Place the monitor on foreign objects That could scratch the surfaceof panel 4 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 8: ...patibility Separate Sync Composite Sync SOG Video Compatibility Shall be compatible with all PC type computers Macintosh computers and after market video cards Resolution Compatibility 640 x 350 640 x 480 720 x 400 640 x 400 800 x 600 832 x 624 1024 x 768 1152 x 864 1152 x 870 1280 x 720 1280 x 960 1280 x 1024 The image vertical size might not be full screen But the image vertical position should ...

Page 9: ...s Yes 7 640 x 480 72Hz 37 9kHz Yes Yes 8 640 x 480 75Hz 37 5kHz Yes Yes 9 640 x 480 85Hz 43 27kHz Yes Yes 10 720 x 400 70Hz 31 5kHz Yes Yes 11 800 x 600 56Hz 35 1kHz Yes Yes 12 800 x 600 60Hz 37 9kHz Yes Yes 13 800 x 600 75Hz 46 9kHz Yes Yes 14 800 x 600 72Hz 48 1kHz Yes Yes 15 800 x 600 85Hz 53 7kHz Yes Yes 16 832 x 624 75Hz 49 7kHz Yes Yes 17 1024 x 768 60Hz 48 4kHz Yes Yes 18 1024 x 768 70Hz 56...

Page 10: ...m2 Typ after 30 minute warm up 200 cd m2 Min after 30 minute warm up Brightness Uniformity 77 Entire Area Contrast Ratio 500 1 typ 300 1 min Color Depth 16 2 million colors 6 bits 2 bits FRC Viewing Angle Horizontal CR 10 Typical 140º 70º Minimum 120º 60º CR 5 Typical 160º 80º Minimum 140º 70º VIEWING ANGLE VERTICAL CR 10 Typical 140º 70º Minimum 120º 60º CR 5 Typical 160º 80º MINIMUN 140º 70º Res...

Page 11: ... inch Monitor Weight 5 3 Kg 11 7 lbs Ergonomics Tilt Up From 0ºup to 20º Tilt Down From 0ºdown to 3º 5 º l ENVIRONMENTAL Operating Temperature 0 C to 40 C Storage Temperature 20 C to 60 C Operating Relative Humidity 20 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 8 ViewSonic Corporation Confiden...

Page 12: ...ns 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 toggle between analog and digital connections Power light Green ON Orange Power Saving Displays the Main Menu or exits the control screen and saves adjustments...

Page 13: ...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 LCD display 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 The black border around the edge ...

Page 14: ...r the video refresh rate to 60 Hz and set the resolution to its Contrast adjusts the difference between the image background black level and the foreground white level Brightness adjusts background black level of the screen image Input Select allows you to toggle between an analog and a digital signal pre set value functions are not available for DVI input NOTE 1 Auto Image Adjust works with most ...

Page 15: ...d blue B 1 To select color R G or B press button 2 2 To adjust selected color press or Important If you select RECALL from the Main Menu when the product is set to a Preset Timing Mode colors return to the 6500K factory preset Control Explanation SRGB 9300K 6500K 5400K User Color Color Adjust sRGB sRGB is quickly becoming the industry standard for color management with support being included in ma...

Page 16: ...s are explained below Horizontal Size adjusts the width of the screen image Horizontal Position moves the screen image left or right Vertical Position moves the screen image up or down Fine Tune sharpens focus by aligning the illuminated text and or graphic characters Sharpness adjusts the clarity and focus of the screen image Control Explanation H V Position Manual Image Adjust 1 Exit 2 Select H ...

Page 17: ...s displayed For example with a 15 second setting if a control is not pushed within 15 seconds the display screen disappears OSD Background allows you to turn the On Screen Display background on or off Control Explanation Memory Recall returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user guide Exception This control doe...

Page 18: ...ORY RECALL 1 4 CONTRAST and BRIGHTNESS can be directly controlled with UP DN key 2 CONNECTORS 2 1 AC inlet CEE22 typed connector 2 2 Video signal connector 14P Mini D Sub PIN MNEMONI SIGNAL 1 RV Red Video 2 GV Green Video 3 BV Blue Video 4 NC None 5 GND Ground DDC return 6 RG Red GND 7 GG Green GND 8 BG Blue GND 9 5V 5V for DDC 10 SG Sync GND 11 NC None 12 SDA DDC Data 13 HS Horizontal Sync 14 VS ...

Page 19: ... On 40Watt Green Standby 1Watt Amber Off 1Watt 3 3 Acceptable timing If your timing is within following specification this LCD display can automatically function with a certain position Horizontal Sync frequency 30 81 kHz Vertical Sync frequency 56 85Hz 1280x1024 75Hz 3 4 Signal level and input impedance 3 4 1 Video Signal level This LCD display is adjusted at the factory using 0 7 Vp p Video sign...

Page 20: ... 20 20 20 20 20 20 00 00 110 00 FC 00 56 58 39 31 32 0A 20 120 20 20 20 20 20 20 00 28 ______________________________________________________________________ 08 09 ID Manufacturer Name VSC 11 10 Product ID Code 8D1A 12 15 Last 5 Digits of Serial Number Not Used 16 Week of Manufacture 01 17 Year of Manufacture 2004 10 17 Complete Serial Number See Descriptor Block 18 EDID Version Number 1 19 EDID R...

Page 21: ...2 X 864 75Hz 1024 X 768 85Hz 800 X 600 85Hz 640 X 480 85Hz Not Used Not Used Not Used ______________________________________________________________________ 54 71 Detailed Timing Descriptor Block 1 1280x1024 Pixel Clock 108 00 MHz ______________________________________________________________________ Horizontal Image Size 376 mm Vertical Image Size 301 mm Refreshed Mode Non Interlaced Normal Displ...

Page 22: ...tailed Timing Descriptor Block 3 Monitor Range Limits Min Vertical Freq 50 Hz Max Vertical Freq 85 Hz Min Horiz Freq 30 KHz Max Horiz Freq 82 KHz Pixel Clock 140 MHz Secondary GTF Not Supported ______________________________________________________________________ 108 125 Detailed Timing Descriptor Block 4 Monitor Name VX912 126 No Extension EDID Block s 127 CheckSum OK 19 ViewSonic Corporation Co...

Page 23: ...30 31 0A 90 00 00 00 FD 00 32 55 1E 52 0E 100 00 0A 20 20 20 20 20 20 00 00 110 00 FC 00 56 58 39 31 32 0A 20 120 20 20 20 20 20 20 00 7D ______________________________________________________________________ 08 09 ID Manufacturer Name VSC 11 10 Product ID Code 8D1A 12 15 Last 5 Digits of Serial Number Not Used 16 Week of Manufacture 01 17 Year of Manufacture 2004 10 17 Complete Serial Number See ...

Page 24: ... 864 75Hz 1024 X 768 85Hz 800 X 600 85Hz 640 X 480 85Hz 640 X 400 70Hz Not Used Not Used ______________________________________________________________________ 54 71 Detailed Timing Descriptor Block 1 1280x1024 Pixel Clock 108 00 MHz ______________________________________________________________________ Horizontal Image Size 376 mm Vertical Image Size 301 mm Refreshed Mode Non Interlaced Normal Di...

Page 25: ...tailed Timing Descriptor Block 3 Monitor Range Limits Min Vertical Freq 50 Hz Max Vertical Freq 85 Hz Min Horiz Freq 30 KHz Max Horiz Freq 82 KHz Pixel Clock 140 MHz Secondary GTF Not Supported ______________________________________________________________________ 108 125 Detailed Timing Descriptor Block 4 Monitor Name VX912 126 No Extension EDID Block s 127 CheckSum OK 22 ViewSonic Corporation Co...

Page 26: ...air to an internal crystal oscillator and corresponding logic A 14 318 MHz crystal is recommended b Analog to Digital Converter The MST8131A chip has three ADC s analog to digital converters one for each color red green and blue The analog RGB signals are connected to MST8131Aas described below Pin Name Pin Number Red 63 Red 62 Green 60 Green 59 Blue 58 Blue 57 c OSD The MST8131A has a fully progr...

Page 27: ...device consists of an internal temperature compensated reference comparator controlled duty cycle Oscillator with an active current sense circuit Desired output voltage are determined by the equation Volt 1 25 1 R85 R86 In this case the output voltage are 5 0 Volts for panel power 6 2 Power Inverter Board This is a specific power inverter power board for VE912 monitor 40W 12V 3 5A output power and...

Page 28: ...ightness low Press 2 Button to enter Contrast Item Press 1 Button to exit the item 3 Color Adjust Page Press 2 Button to enter Color Adjust page Press 1 Button to exit the page Press Up Button to the previous item or Down Botton to the next item 1 sRGB Item 2 9300K Item 3 6500K Item 4 5400K Item Press 2 Button to select current Item Press 1 Button to exit current item 5 User Color Item Press 2 But...

Page 29: ...ize item Press 1 Button to exit Horizontal Size item Press Up Button to make current item high Press Down Button to make current item low 3 Fine tune Item Press 2 Button to enter Fine tune item Press 1 Button to exit Fine tune item Press Up Button to make current item high Press Down Button to make current item low 4 Sharpness Item Press 2 Button to enter Sharpness item Press 1 Button to exit Shar...

Page 30: ...ess Down Button to make current option low 4 OSD Time Out Item Press 2 Button to enter OSD Time Out item Press 1 Button to exit OSD Time Out item Press Up Button to make OSD time out long Press Down Button to make OSD time out short 5 OSD Background Item Press 2 Button to enter OSD Background item Press 1 Button to exit OSD Background item Enable Disable Option Press 2 Button to select the option ...

Page 31: ... 480 67Hz 35 0kHz Yes 7 640 x 480 72Hz 37 9kHz Yes 8 640 x 480 75Hz 37 5kHz Yes 9 640 x 480 85Hz 43 27kHz Yes 10 720 x 400 70Hz 31 5kHz Yes 11 800 x 600 56Hz 35 1kHz Yes 12 800 x 600 60Hz 37 9kHz Yes 13 800 x 600 75Hz 46 9kHz Yes 14 800 x 600 72Hz 48 1kHz Yes 15 800 x 600 85Hz 53 7kHz Yes 16 832 x 624 75Hz 49 7kHz Yes 17 1024 x 768 60Hz 48 4kHz Yes 18 1024 x 768 70Hz 56 5kHz Yes 19 1024 x 768 72Hz...

Page 32: ...or performance RGB color Check the color temperature of RGB signal color Pattern 3 4 5 4 Sub pixel defect RGB color Check the sub pixel defect Pattern 3 4 5 5 Full white Full white Check the brightness CR bright pixel defect Pattern 6 6 Full black Full black Pattern 7 7 5 cycle pattern 5 cycle pattern Check the BU Pattern 8 8 1 dot pattern 1 dot pattern Check the flicker Pattern 9 Pattern 1 Patter...

Page 33: ...Pattern 5 Pattern6 Pattern 7 Pattern 8 Pattern 9 30 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 34: ...or please check whether the firmware version If not please 1 Equipment needed VX912 PC Personal computer LPT cable Fixture LM5ISP Firmware upgrade program following procedure to upgrade to the latest version 31 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 35: ...ISP environment Hardware PC or notebook parallel printer cable ISP tooling Software If OS was Win2000 or WinXP please install PORT95NT exe In order to ensure can execute ISP program please set BIOS in PC or Notebook as Fig 0 0 Fig 0 0 32 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 36: ...k the PORT95NT exe in Windows install the program see Fig 0 1 Fig 0 1 3 Keep on press Next 4 times to go through the installation processes see Fig 0 2 Fig 0 2 33 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 37: ...4 Choose Typical then press Next see Fig 0 3 Fig 0 3 5 Keep on press Next 4 times to go through the installation processes see Fig 0 4 Fig 0 4 34 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 38: ...SP 1 User could download ISP driver and PORT95NT install from Myson Century website www myson com tw 2 After extracting the ZIP file the total files list as Fig 1 0 and double click the file of setup exe to install Fig 1 0 35 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 39: ...ontinue see Fig 1 1 Fig 1 1 4 Keep default setting or press Change button for selecting the path that you want and then press Next button to continue see Fig 1 2 Fig 1 2 36 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 40: ...5 Press Install button to continue see Fig 1 3 Fig 1 3 6 Installation has finished press Finish button see Fig 1 4 Fig 1 4 37 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 41: ... bar default setting see Fig 2 1 Fig 2 1 2 Security file is a key to use ISP function press OK button see Fig 2 2 Fig 2 2 3 The warning is used to remind user of that different CPU rate may cause ISP function fail Fig 2 3 it s limited by IIC protocol press OK button see Fig 2 3 38 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 42: ...ess Create Security File button to key in Security code Adjusting bar to decrease speed of IIC bus See Fig 2 4 Fig 2 4 Speed of IIC bus Security code 39 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 43: ...it needs 2 command No and key in command sequentially for 7C 4C 77 The command No and command must be set by user while coding About the detailed of setting please refer to section 6 boot code of ISP Fig 2 5 40 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 44: ...elect MTV type first load the binary or intel hex file that you want to program into the MCU and select AUTO item then press RUN button see fig3 1 Fig 3 1 Step 3 Step 1 Step 2 Step 4 41 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 45: ... be cleared 3 CRC cyclic redundancy check the host can check CRC register s result instead of reading every byte in flash The message of Check MCU CRC OK means that the host verify OK for the progress of program see Fig 3 2 Fig 3 2 42 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 46: ...1 No Power 6 Trouble Shooting Flow Chart 43 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 47: ...2 No Characters Missing Color 3 Always show NO SIGNEL 44 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 48: ...P 10P REV1A Added 10 07 04 M MS 0808 9398 DDL7VDTH009 cable Button MB 1 CD user s menu Removed 10 07 04 A CD VX910 HGL9V001013 CD wizard user s menu 1 User Manual CD R L9VD HGL9V002 R3A VX912 Added 10 07 04 DC 00000264 HGL9V002010 CD wizard user s menu 1 13 Electronic 19 LGL TFT LCD panel M LCD 0826 0252 AA190E03018 LCD panel 1 14 Screw M SCW 0824 6859 MM40060IL69 screw 4 15 Screw M SCW 0824 6802 ...

Page 49: ... LI1 MBLI1004 REV3A 4 2 M MS 0808 9247 EBL70023013 WIRE MOUNTS L70L E EBL70023 REV3A 1 2 N A EBL7V030013 PCB SPACER L7VD EBL7V030 REV3A 1 1 C BS 0303 0553 24L9VSAVS02 L9V STAND ASSY 1 2 N A 34L9VSBVS08 L9V STAND BKT ASSY 1 2 C BS 0303 0553 EAL9V004017 STAND BASE L9V EAL9V004 REV3A 1 2 M MS 0808 9811 GAL5M002011 RUBBER FOOT L5M GAL5M002 REV3B 4 2 M CV 0830 2589 EAL9V005013 STAND BKT COVER L9V EAL9V...

Page 50: ...47 ViewSonic Corporation Confidential Do Not Copy VX912 8 Exploded Diagram And Spare Parts List ...

Page 51: ...ELDING L7VD FAL7V015 REV3A 1 21 M SCW 0824 6802 MM30040IBJ9 SCREW M3 0 4 0 I NI 10 22 M MS 0808 9811 GAL5M002011 RUBBER FOOT L5M GAL5M002 REV3B 4 23 M SCW 0824 0813 MF30060BBJ6 SCREW F3 0 6 B NI 1 24 M CV 0830 2589 EAL9V005013 STAND BKT COVER L9V EAL9V005 REV3A 1 25 M MS 0808 9812 EBL9V001019 STAND COVER F L9V EBL9V001 REV3A 1 26 M BK 0805 0110 FBL9V005014 STAND BKT L9V FBL9V005 REV3A 4 27 C BS 03...

Page 52: ...onitor 2 P FM 0602 0896 HBL9V001019 End cap L 3 P FM 0602 0897 HBL9V002015 End cap R 4 DC 00000264 HGL9V002010 User menual CD ROM 5 A PC 0106 0224 DM333181G97 Power cord 3P 1 8M 6 P BX 0601 1085 HFL9V003015 Carton 7 M LB 0813 1042 HCL7V019011 Carton label 8 M MS 0808 9817 HAL9V002014 PE bag PACKING PARTS LIST VX912 1 Packing for shipping ...

Page 53: ...Packing procedure 1 Paste protection film to protect the monitor 2 Put the monitor in EPE bag seal the with tape 3 Put the cushion on the monitor 50 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 54: ...ll the accessories into the carton QSG Power cord Then close the carton Disassemble monitor 1 Turn the monitor face to back side take the I O cover off 2 Remove the stand back cover 51 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 55: ...e the 4pcs of black hinge screw separate the stand head part 4 Face down put the monitor on soft surface of desktop 5 Separate the back cover front bezel 52 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 56: ...ove the screws which for fixed the B B pull the cable out from the 7 Remove the B B 8 Remove the screws on PCB shield remove it Screws connector on M B 53 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 57: ...9 Remove the MB LCD connector loosen the 4 screws on PCB holder Screws 10 Separate the PCB holder panel 54 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 58: ...11 Loosen the 4 screws on the sides of panel 12 Remove the front bezel panel 55 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 59: ...13 Remove the 4 hexagon screws beside the DVI D sub connector 14 Remove the screws which fixed the power board Main board 56 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 60: ...9 1 Video 9 Block Diagram 57 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 61: ...9 2 Power 58 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 62: ...CC 5 0V 3 3V 2 5V AIC1117AIJ 2 5V PANEL 17 19 RSDS OR LVDS 12V 3 3V LCDPWR_ON12V SCALAR MST8131A MST8136A RSDS AND LVDS AC 90 264V INVCTRL 3 3V 3 3V BRIGHTNESS 12V AIC1563 DVI 3 3V AIC1117AIJ DISPLAY BLOCK DIAGRAM 2 8 Thursday February 19 2004 B Title Size Document Number Rev Date Sheet of 59 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 63: ... 6 R10 75 6 R22 100 6 R120 0 6 L2 FCM 1608C 300T06 BULL WILL R26 10K 6NC R116 0 6 C1 0 047u 6 C13 33P 6 D16 Z5 6 NS 2 1 R119 0 6 CN1 VGA 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 16 17 D5 Z5 6 NC 2 1 C5 NC D6 Z5 6 NC 2 1 D19 Z5 6 NC 2 1 D3 DAN217K NC 1 2 3 R14 1K 6 D17 Z5 6 NS 2 1 D7 Z5 6 NC 2 1 R15 2K 6 D8 Z5 6 NC 2 1 D11 BAT54C GS08 D12 Z5 6 NC 2 1 R1 75 6 R2 75 6 F R122 0 6 D20 Z5 6 NC 2 1 R3 75 6 D2...

Page 64: ... 11 21 84 94 104 114 126 18 87 97 117 39 56 36 2 54 42 10 20 85 95 115 127 19 86 96 105 116 33 34 108 109 110 111 112 113 98 99 100 101 102 103 88 89 90 91 92 93 16 17 22 23 24 25 6 7 8 9 12 13 14 15 122 123 124 125 128 1 4 5 118 119 120 121 75 76 77 78 83 82 81 80 79 29 28 30 31 53 65 64 48 68 RIN0 GIN0 SOGIN0 BIN0 RIN0M GIN0M BIN0M HSYNC0 VSYNC0 R R G G B B CK CK REXT REFP REFM CSZ SDA SCL HWRES...

Page 65: ...4501 10 10P R 1 2 3 4 5 6 7 8 9 10 R46 100 6 R70 1K 6 C54 0 1U 6 NC R106 33K 6 D33 DAN217K NC 1 2 3 R105 33K 6 U4 24LC08B 1 2 3 4 5 6 7 8 A0 A1 A2 VSS SI SCK WP VCC R98 33 6 Q2 MMST3906 R55 10K 6 R47 100 6 D34 DAN217K NC 1 2 3 R41 82K 6 R97 4 7K 6 D35 DAN217K NC 1 2 3 R93 1K 6 D36 DAN217K NC 1 2 3 R113 2K 6 R49 22 6 D37 DAN217K NC 1 2 3 C56 0 1u 6 C50 22P 6 R52 10K 6 R19 100 6 R71 4 7K 6 R42 NC L1...

Page 66: ...2 Q9 DTC144EUA 2 3 1 C80 0 1U 6 NC 1 2 1 H1 MTH276D126 2 3 4 5 6 7 8 9 C81 0 1U 6 NC 1 2 C74 0 1U 6 NC 1 2 L26 0 8 NC C76 2200P 6 1 2 C73 2200P 6 NC 1 2 1 1 C77 2200P 6 1 2 R75 10K 6 Q8 DTC144EUA NC 2 3 1 CN7 AF750B A2G1T 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 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 R74 82K 6 C72 2200P 6 NC 1 2 L30 0...

Page 67: ...17 14 12 11 10 13 15 16 1 2 3 19 20 18 INL INR VAROUT_L VOLUME VAROUR_R OUTL OUTR MUTE STBY SVR GND VS VS GND GND GND GND GND GND AC10 0 1U 8 NC AR8 20K 6 NC AR6 100 6 NC AL6 BEAD 1206 NC AR10 CX201209805 8 NC AL5 BEAD 1206 NC AR3 10K 6 NC AR2 10K 6 NC AC7 220P 6 NC AR4 3 9K 6 NC ACN1 4606 04 04P R NC 1 2 3 4 AC4 0 47U 8 NC AR7 20K 6 NC AR9 CX201209805 8 NC AR12 10K 6 NC AL4 600 CX601T02001 NC 1 2...

Page 68: ...6 L33 CX000800000 1206 R63 0 1206 U21 AIC1563 1 2 3 4 5 6 7 8 DC DE CF GND FB VCC IS BOOST C61 0 1u 6 C63 0 1u 6 R66 3K 6 1 C67 0 1u 6 R86 330 6 R85 200 6 R16 330K 6 U22 LT1117 TO223 1 2 3 4 ADJ GND VOUT VIN OUT U23 LT1117 TO223 1 2 3 4 ADJ GND VOUT VIN OUT D26 RB081L 20 2 1 C57 1u 8 Q13 NDS9410A SO 2 3 4 5 7 6 8 1 FUSE1 0 1206 1 2 C59 0 1u 6 D1 1SS355 C69 100u 16V D9 1SS355 R78 1K 6 C58 330u 16V ...

Page 69: ...11 PCB Layout Diagrams 66 ViewSonic Corporation Confidential Do Not Copy VX912 ...

Page 70: ...ng VX912 Service Manual m e t I t n e l l e c x E d o o G r i a F d a B 1 2 3 t i n U r i a F d a B in the USA at facsimile 1 909 839 7943 You may also e mail any suggestions to the Director Quality 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 Spare Parts List 7 Recommended Spare Parts List Adjusting Procedure 2 Speci...

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