ViewSonic VS10805 Service Manual
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ViewSonic VS10805 Service Manual

ViewSonic VS10805 Service Manual

19” color tft lcd display
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Service Manual

ViewSonic VA905-1
Model No. VS10805
19" Color TFT LCD Display
(VA905_SM Rev. 1a Jun. 2005)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic VS10805

  • Page 1: Service Manual

    Service Manual ViewSonic VA905-1 Model No. VS10805 19” Color TFT LCD Display (VA905_SM Rev. 1a Jun. 2005) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...

  • Page 2: Revision History

    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.

  • Page 3: Table Of Contents

    4. Circuit Description 5. Adjustment Procedure 6. Troubleshooting Flow Chart 7. Recommended Spare Parts List 8. Exploded Diagram and Spare Parts List 9. Block Diagram 10. Schematic Diagrams 11. PCB Layout Diagrams Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 4: Precautions And Safety Notices

    CFL Reflector edge softly. Otherwise the TFT Module may be damaged. (10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate or tilt the Interface Connector of the TFT Module. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 5 (14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950 or UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 6 Do not touch and that may cause ”Mura”. the surface of the polarizer. Take out the monitor with cushions Taking out the monitor by grasping the LCD panel. That may cause ”Mura” Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 7 Place the monitor on a clean and soft foam Placing the monitor on foreign objects. That pad. could scratch the surface of the panel or cause “Mura”. The panel is placed facedown on the lap. That may cause “Mura”. Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 8: Specification

    1024 x 768 @ 85Hz, 68.67kHz 18. 1024 x 768 @ 85Hz, 68.67kHz 1280 x 1024 @ 60Hz, 63.4kHz 19. 1280 x 1024 @ 60Hz, 63.4kHz 20. 1280 x 1024 @ 75Hz, 79.97kHz Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 9 Viewing Angle (Horizontal) 140 degrees @ CR>10 Viewing Angle (Vertical) 130 degrees @ CR>10 Response Time 12 ms (typ.) 10%-90% @ Ta=25°C 20 ms (maximum) Note: The 2 source of LCD panel is “HSD190ME12-A04” Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 10 Storage Temperature -20°C to +60°C Operating Relative Humidity 20% to 80% 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 Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 11: Front Panel Function Control Description

    Also a shortcut to Auto Image screen. Adjust. Power light Displays the Green = ON Main Menu or exits the Orange = Power Saving control screen and saves adjustments. Standby Power On/Off Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 12 Select the menu items shown below by using the up [▲] and down [▼] buttons. Main Menu: Auto Adjust: To automatically adjust H./V. Position, Phase adjust and Clock adjust. REMARK: There may need manual adjustment of “ phase ＂ for optimized performance for various VGA tolerance. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 13 Contrast /Brightness: To adjust the Contrast of the video and the backlight currency. Color Adjust: To select the color temperature 6500°K, 9300°K , 5400°K or user settings. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 14 Information: To display the data about Horizontal / Vertical frequency, Pixel clock, Resolution , Model number and Serial No. of the monitor. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 15 H./V. Position: To adjust the horizontal and vertical position of the video. Hsize: To adjust the horizontal pixel clock of the video. Fine Tune: To adjust the delay time of data and clock. Sharpness: To select the picture sharpness of display. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 16 Restore default settings of Clock, H./V. Position, Phase, Contrast, Brightness, Color temperature, OSD position, OSD timeout and Sharpness, Volume. Audio Menu: Volume: To adjust the output of speaker or earphone. Mute: To set or reset the mute function. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 17 [Up] + [Down] + [Power On] with signal Inter FACTORY mode adj white balance. (hold for 3 seconds) [Up] + [Down] + [Power On] Burn in Mode. without signal (hold for 3 seconds) Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 18: Circuit Description

    Such pin as input function. A “open drain pin” means it can sink at least 4mA current but only drive 10~20uA to VDD. It can be used as input or output function and needs an external pull up resistor Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 19: Adjustment Procedure

    1024 x 768 @ 70Hz, 56.5kHz 15. 1024 x 768 @ 70Hz, 56.5kHz 1024 x 768 @ 72Hz, 58.1kHz 16. 1024 x 768 @ 72Hz, 58.1kHz 1024 x 768 @ 75Hz, 60.0kHz Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 20 White Balance White & Black The screen must have the Figure 9 Pattern pure white and black pattern, no other color. Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2) Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 21 Horizontal & Vertical Thickness Pattern (Figure 3) R. Color Pattern (Figure 4) G. Color Pattern (Figure5) B. Color Pattern (Figure 6) Full White Patter (Figure 7) Dark Screen Pattern (Figure 8) Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 22 (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. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 23 After final QC step, we have to erase all saved changes again and restore the factory defaults. You should do “All Mode Reset” again. 1.5.15 Power Off Monitor Turn off the monitor by pressing “Power” button. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 24 2.2.1 Connect P2 of Fixture with printer port of PC by LPT Cable. 2.2.2 Connect P1 of Fixture with Monitor by VGA Cable. 2.2.3 Connect Power Cord to Monitor. 2.2.4 Connect PC to the additional monitor. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 25 3. ISP Download program procedure 3.1 Hardware Connect status: 3.2 Down load isp program Step 1: Execute ISP.exe Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 26 Then press the Creat Security File Button to enter step 3. Step 3: Creat Security File Enter the three string into the blank like fig 2. Then press OK Button. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 27 Press the 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. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 28 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 upgrade. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 29 - VA905 Series Monitor - DDC Card - PC - RS232 cable - DVI-DVI Cable - Barcode Reader - VGA Cable VA905 DDC Card DVI-DVI Cable RS-232 Cable Barcode Reader VGA Cable Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 30 4.(when key in DVI DDC information, use VGA transform to DVI port ) 5.Connect Power Cord to VA905 Monitor. 4.3 DDC Key In Procedure 1.Run DDC.exe 2.Choose model number and conform the Time then Press “ENTER” key. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 31 3.When appear the PIC “ choose DDC Card”, Press ALT+2 .Enter DDC 2B test interface. Choose DDC Card 4.Press F8 to choose corresponding model.DAT(VA905_A.DAT press“ENTER” key) VA905_A means the DDC under analog mode. VA905_D means the DDC under digital mode. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 32 5.Press F9 enter the download interface 6.Key in the serial number or use the barcode reader to scan the barcode of the monitor, and press “ENTER” key. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 33 7.The successful picture is as follows. ”Compare EDID ：OK! Press any key to continue”. 8.Let VA905 active, then see the information in OSD, it shows ”Serial NO : PTS052101075” Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 34 4.4 check method Use ViewSonic EDID Editor Connect the VA905 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: Confidential - Do Not Copy ViewSonic Corporation...

  • Page 35: Troubleshooting Flow Chart

    - PC (Personal Computer) with SXGA resolution and sound card / Pattern Generator 2. Main Procedure Star Power -on A.Power Circuit Power LED ok? Troubleshooting B.Performance Is display performance ok? Troubleshooting C.Function Is function adjustment ok? Troubleshooting D.Speakers Are Speakers all right? Troubleshooting Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 36 Change Is screen black? Power Board Main Board Main Board Replug Change Change Is screen white? or Change Main Board LCD Panel FPC Cable Change Change Abnormal Color? Main Board LCD Panel Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 37 Ghost image disappears, go to “Yes”; else, go to “No.” 2. Check the compatibility on the computer. If it is compatibility problem, feedback the information to ViewSonic; else, go to “No.” Confidential - Do Not Copy ViewSonic Corporation...
  • Page 38 2.3 C. Function Troubleshooting Start Change Change Control Board Main Board 2.4 D. Speakers Troubleshooting Start Change Change Speakers Power Board Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 39: Recommended Spare Parts List

    I/O CABLE D15/D15 20276(3+6) 1.83M BLACK A-VC-0101-0386 2427501187 P961 I/O CABLE DVI/DVI 20276(3+6) 1.83M BLACK CB-00003178 2427501189 P971 Documentation: CD-OWNER GUIDE VA905 WIZARD HSD VS10805 DC-00003179 2438501187 6P80 GUARANT CARD VIEWSONIC VA905 QSG DC-00003180 2002310472 6P84 Electronic LCD PANEL RA HSD190ME12-A02 (A-) 12ms HSD...
  • Page 40 BOM LIST (VA905-1) ViewSonic Model Number: VS10805-1W Rev: 1a Item ViewSonic P/N Ref. P/N Description Location Q'ty C-00003177 2024267706 FRONT BEZEL JT198QP VA905 ABS94HB PS-7604B 1F01 #N/A 2053753501 LED INDIC.-PWR JT178WP/PMMA 94HB 1F02 #N/A 2044266002 FUNCTION KEY JT178W /ABS 94HB PS-7604B...
  • Page 41 Item ViewSonic P/N Ref. P/N Description Location Q'ty #N/A 2718537700 FRONT OTHER JT198QP46D(2) BT39 C101 C141 C146 #N/A 2333610613 CAP,ELE 105'C EC 10u/ 50V 5*11 P=2.5 T C150 C152 C158 C193 C104 C109 C110 #N/A 2333347613 CAP,ELE 105'C EC 47u/ 16V 5*11 P=2.5 T...
  • Page 42 Description Item ViewSonic P/N Ref. P/N Location Q'ty E-C-0404-3470 2272133191 CAP,CER TC 330p/50V CH P=5.0 J T C913 E-C-0404-2069 2333622591 CAP,ELE 105'C EC 2.2u/ 50V 5*11 P=5.0 T C928 D101 L102 L103 E-R-0405-6600 2253200096 RES,CHIP 1/10W RC 0603 1/10W 0 ohm J T...
  • Page 43 Description Item ViewSonic P/N Ref. P/N Location Q'ty #N/A 2365330591 IC,LINEAR L78L05ACZ TO-92 I902 RC #N/A 2365330491 IC,LINEAR HC78L05 TO-92 HC-SEMI I902 RB #N/A 2365330291 IC,LINEAR KA78L05AZ TO-92 FAIRCHILD I902 RA M-WR-0828-0460 2428106125 JUMPER 0.6f *12.5mm J601 J603 J602 J604 J605 J801...
  • Page 44 Item ViewSonic P/N Ref. P/N Description Location Q'ty Q905 RA Q906 RA E-00001012 2361611500 FET,N-CH AP9977GJ(T-TYPE) TO-251 APEC Q911 RA Q912 RA Q905 RB Q906 RB E-00001011 2361611100 FET,N-CH AOU402 T0-251 Q911 RB Q912 RB R101 R102 R206 E-R-0405-6410 2253210296...
  • Page 45 Item ViewSonic P/N Ref. P/N Description Location Q'ty #N/A 2202130000 PC BOARD T198AP66 P/B FR1 196*167 U801 E-00003181 2212006305 LCD PANEL HSD190ME12-A02 (A-) 12ms HSD V901 RB E-00003182 2212006303 LCD PANEL HSD190ME12-A02 (A) 12ms HSD V901 RA #N/A 2391301081 SPEAKER ASS'Y 1W 8ohm 52*19.5*14...

  • Page 46: Exploded Diagram And Spare Parts List

    MAIN PCB ASS'Y 14 X4 24 X4 18 X2 15 X4 FIG.1 FIG.2 NOTE.1 31 X2 30 X2 FIG.2 W602 29 X2 26 X6 POWER PCB ASS'Y 21 X2 W601 KEYPAD PCB ASS'Y Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 47 EXPLODED PARTS LIST (VA905-1) ViewSonic Model Number: VS10805-1W Rev: 1a Item ViewSonic P/N Ref. P/N Description Q'ty C-00003175 2603307769 FRONT BEZEL JT198QP VA905 ABS94HB PS-7604B C-00003191 2022263602 CABI BACK JT198QP DVI ABS94HB BLACK M-BK-0805-0070 2071869400 BRACKET,FIX METAL PLATE 1.0MM KENSINGTON...

  • Page 48: Packing For Shipping And Disassembly Procedure

    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) Power code VGA Cable DVI Cable Stand Unit VA905 Monitor Audio Cable Figure 3 Figure 4 User’s Guide Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 49 Disassembly Procedure 1. Disassembly of Stand, Hinge unit from Monitor Detach Stand Unit from the monitor. Remove the Dust cover. Unscrew four screws that secure Hinge Unit. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 50 2. Disassembly of Front Cover and Rear Cover Unscrew three screws that secure Rear Cover to remove Front Cover. Unscrew five screws to remove Rear Cover. Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 51 Shielding Plate 3.2. Unscrew 6 screws, 2 hexagon screws and disconnect the wires to remove Main Board. Main Board 3.3. Unscrew 6 screws and disconnect the wires to remove Power Board. Power Board Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 52 Lay Panel Unit facedown and unscrew 4 screws on its right and left sides to remove Panel Unit. Panel Unit 3.5. Unscrew 2 screws to remove Key Pad and remove the Speaker. Keypad Board Panel Bracket Speaker Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 53: Block Diagram

    P601 Q104 I102 I108 AUDIO 1.8V INPUT I101 P603 X101 SYNC 5VMCU R,G,B INPUT I103 I106,DDC Q105,Q106 H,V SYNC EEPROM VGA D-SUB P102 I107 X102 SCL,SDA VGA5V VGA DVID EEPROM P103 I104 Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 54: Schematic Diagrams

    VAA3 C193 VAA3 R102 1K R101 1K VAA4 VAA4 C101 R103 4.7K Q104 AdjBACKLITE 4 MMBT3904 10uF/50V Q105 MMBT3906 R204 1.5K Q106 D126 D127 PC5V MMBT3906 PC5V VCPU C191 47uF/16V R205 R206 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 55 RX1- RX1+IN RX1+ D120 D121 R136 R137 RX3- I104 R134 C130 RX3+ R135 ST_DET2 6 VCLK HOT_PLUG RX0-IN C131 RX0- CLK- RX0+IN RX0+ CLK+ 24C21 RX5- RX5+ RXC+IN RXC+ RXC-IN RXC- Shell Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 56 HWRESET HWRESETZ VAA3 DDCROM_CLK/GPO6 DDCROM_DAT/GPO5 10uF/50V C152 C153 C154 AdjBACKLITE PWM0 Volume PWM1 C155 22pF X101 R141 VAA4 L112 VDPLL 14.318MHZ VAA4 XOUT C156 22pF C157 .1u 10uF/50V BYPASS AVSS_LPLL C158 C159 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 57 RXE1- RXE1+ RXO3+ RXO1- RXO1+ RXE2- RXE2+ PA[0..9] PA[0..9] RXO2- RXO2+ RXE0- RXEC- RXEC+ RXOC- RXOC+ RXE3- RXE3+ RXE0+ RXO3- RXO3+ RXE1- RXE1+ RXE2- CONN15x2 TO PANEL RXE2+ RXEC- RXEC+ RXE3- RXE3+ Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 58 R179 GREEN R181 100/0603 MENU R182 100/0603 R183 100/0603 DOWN PWR/SW R184 100/0603 SELECT PSM/LED PWR/LED CON8 C177 C178 C179 C180 C181 C182 C183 GREEN ORANGE D701 S703 S705 S702 S704 S706 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 59 TO SPEAER OUT2- C616 IN2- 0.22uF/100V P603 C612 AUDIO INPUT (GREEN) L601 3.5X9X0.8 4.7nF R610 IN2+ C611 OUT (R+) OUT2+ L602 3.5X9X0.8 0.22uF/100V C617 0.22uF/100V R611 L603 R618 R619 C606 1uF/50V SOLDER SIDE Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 60 R813 R811 R819 R820 5.1K 1206 BEAD 4.7K/ 1206 9.1K 1%/ 1206 I802 TLP621F R818 68K/ 1206 D809 C810 Q803 I803 R812 R847 22uF/50V TL431 2SC945/DIP Q804 2SC945/DIP P801 AC IN 100-240V Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 61 R926 Q903 Q904 2N7002/SOT23 1N4148/SMD R927 1K/0805 2N7002/SOT23 D911 430/ 1%/0805 R929 D912 R936 DAN217U/SOT23 68K,1%/0805 1K/0805 1M/0805 C927 1N4148/SMD 0.1uF/0805 R930 R931 200/ 1%/0805 D913 1N4148/SMD R932 430 1%/0805 R933 10K,1%/0805 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 62 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 63 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 64 Confidential - Do Not Copy ViewSonic Corporation VA905...
  • Page 65 Confidential - Do Not Copy ViewSonic Corporation VA905...

  • Page 66: Pcb Layout Diagrams

    Add.: Fax: Tel: E-mail: After completing this form, please return it to ViewSonic Quality Assurance 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) Confidential - Do Not Copy...

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