ViewSonic VA721-2 User Manual Download

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Model No.

VLCDS 27998-5W

”

Color

TFT LCD Display

Service Manual

ViewSonic

21-2

ViewSonic

381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

(VA721-2_SM Rev. 1a Jan. 2006)

Summary of Contents for VA721-2

Page 1: ...Model No VLCDS 27998 5W 17 Color TFT LCD Display Service Manual ViewSonic VA721 2 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 VA721 2_SM Rev 1a Jan 2006...

Page 2: ...d 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...

Page 3: ...escription 8 4 Circuit Description 14 5 Adjustment Procedure 24 6 Troubleshooting Flow Chart 47 7 Recommended Spare Parts List 49 8 Exploded Diagram and Exploded Parts List 51 9 Block Diagram 54 10 Sc...

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 fro...

Page 5: ...e 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 s...

Page 6: ...cover of the monitor Do not touch the surface of the polarizer If the surface of the panel is pressed by fingers this may cause MURA Take out the monitor by grasping the cushion If the monitor is remo...

Page 7: ...hods Incorrect Methods Place the monitor on a clean soft foam pad If the monitor is placed on foreign objects that could scratch the surface of the panel ViewSonic Corporation Confidential Do Not Copy...

Page 8: ...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...

Page 9: ...Hz 53 7kHz 13 832 x 624 75Hz 49 7kHz 14 1024 x 768 60Hz 48 4kHz 15 1024 x 768 70Hz 56 5kHz 16 1024 x 768 72Hz 58 1kHz 17 1024 x 768 75Hz 60 0kHz 18 1024 x 768 85Hz 68 67kHz 19 1280 x 1024 60Hz 63 4kHz...

Page 10: ...al 16 2 million colors Viewing Angle Horizontal typ 140 deg CR 10 170 deg CR 5 Viewing Angle Vertical typ 130 deg CR 10 160 deg CR 5 Response Time 10 90 Ta 25 C 8 ms Typ 12 ms Max Panel Defects Please...

Page 11: ...perating Altitude 0 to 3 000 meters Storage Altitude 0 to 12 000 meters ViewSonic Corporation Confidential Do Not Copy VA721 2 8 Panel Source QDI QDI17EL0711 Type TN dual LVDS Active Size 337 9 mm H x...

Page 12: ...ugh 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 b...

Page 13: ...024 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 ima...

Page 14: ...r Adjust provides several color adjustment modes preset color temperatures and RGB which allows adjustment of red R green G and blue B separately The factory setting for this product is 6500K 6500 Kel...

Page 15: ...ine Tune Sharpness 3 When you are finished making all color adjustments press button 1 twice User Color Individual adjustments for red R green G and blue B 1 To select color R G or B press button 2 2...

Page 16: ...The 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 displaye...

Page 17: ...e listed 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 c...

Page 18: ...mation Manual Image Adjust Setup Menu Memory Recall 1 4 Contrast and Brightness can be directly controlled with UP DOWN buttons 2 Connectors 2 1 AC inlet CEE22 type connector 2 2 Video signal connecto...

Page 19: ...45Watts Green Standby 1Watts Amber Off 1Watts Off 3 3 Acceptable timing If the timing is within following specification this LCD display can automatically function with a certain position Horizontal S...

Page 20: ...A 20 20 20 20 20 20 00 00 110 00 FC 00 56 45 37 31 30 73 0A 120 20 20 20 20 20 20 00 8F ______________________________________________________________________ 08 09 ID Manufacturer Name VSC 11 10 Prod...

Page 21: ...iming Descriptor Block 1 1280x1024 Pixel Clock 108 00 MHz ______________________________________________________________________ Horizontal Image Size 338 mm Vertical Image Size 270 mm Refreshed Mode...

Page 22: ...ON EDID Version 1 Revision 3 DDCTest For ViewSonic VE710b ______________________________________________________________________ EDID Block 0 Bytes 0 127 128 BYTES OF EDID CODE 0 1 2 3 4 5 6 7 8 9 ___...

Page 23: ...Active Off Very Low Power Standard Default Color Space Preferred Timing Mode Display Type R G B Color 25 34 CHROMA INFO Red X 0 639 Green X 0 287 Blue X 0 141 White X 0 313 Red Y 0 344 Green Y 0 615 B...

Page 24: ...igital Separate Horizontal Polarity Vertical Polarity ______________________________________________________________________ 72 89 Detailed Timing Descriptor Block 2 Monitor Serial Number A34050100001...

Page 25: ...MST8111A The MST8111A is a graphics processing IC designed for LCD monitors It provides all key IC functions required for LCD displays On chip functions include a high speed triple ADC PLL high scalin...

Page 26: ...MC34063A U7 The MC34063A is a monolithic control IC containing the primary functions required for DC to DC converters The device consists of an internal temperature compensated reference a comparator...

Page 27: ...urrent 3 5A Turn on delay 3secs 6 2 Power Inverter Board This is a specific power inverter board for VE710 monitor with output of 40W 12V 3 5A It provides 12 VDC to drive the four cold cathode fluores...

Page 28: ...to decrease the brightness Press the 2 button to enter the contrast adjustment page Press the 1 button to exit the page 3 Input Select Page Press the 2 button to switch to digital input mode 4 Color...

Page 29: ...to shift the image upward Press the button to shift the image downward 2 Horizontal Size Item Press the 2 button to enter the horizontal size adjustment page Press the 1 button to exit the page Press...

Page 30: ...tton to shift the menu to the right Press the button to shift the menu to the left b Vertical Position Option Press the 2 button to enter the horizontal position adjustment page Press the 1 button to...

Page 31: ...o increase the contrast Press the button to decrease the contrast 2 Brightness Dialog Press the or button to enter the Brightness Dialog Press the 1 button to exit the Brightness Dialog Press the 2 bu...

Page 32: ...60Hz 48 4kHz Yes 18 1024 x 768 70Hz 56 5kHz Yes 19 1024 x 768 72Hz 58 1kHz Yes 20 1024 x 768 75Hz 60 0kHz Yes 21 1024 x 768 85Hz 68 67kHz Yes 22 1152 x 864 75Hz 67 5kHz Yes 23 1152 x 870 75Hz 68 7kHz...

Page 33: ...re set to 100 Pattern 2 3 RGB color performance RGB color Check the color temperature of RGB signal color Pattern 3 4 5 4 Sub pixel defect RGB color Check for sub pixel defects Pattern 3 4 5 5 Full wh...

Page 34: ...Pattern 5 Pattern6 Pattern 7 Pattern 8 Pattern 9 ViewSonic Corporation Confidential Do Not Copy VA721 2 31...

Page 35: ...rmware upgrade program Print port Fixture VE710s b LPT cable 2 Connection To PC To monitor When examining a monitor please check whether the firmware version is the latest If not please follow the pro...

Page 36: ...7 Appendix A How to install the software for ISP ViewSonic Corporation Confidential Do Not Copy VA721 2 33...

Page 37: ...ll from Myson Century website www myson com tw 1 2 After extracting the ZIP file the total files list as Fig 1 2 and double click the file of setup exe to install 1 3 Press Next button to continue see...

Page 38: ...ing or press Change button for selecting the path that you want and then press Next button to continue see Fig 1 4 1 5 Press Install button to continue see Fig 1 5 ViewSonic Corporation Confidential D...

Page 39: ...aller Information shows package warning Press Ignore button to continue see Fig 1 6 1 7 Installation has finished press Finish button see Fig 1 7 Fig 1 7 ViewSonic Corporation Confidential Do Not Copy...

Page 40: ...1 After installation shortcuts may be found in the settings path or the program menu default setting see Fig 2 1 8 2 The security file is a key to use ISP functions press the OK button See Fig 2 2 Vie...

Page 41: ...ng bar to decrease speed of IIC bus See Fig 2 4 8 3 The warning shown in Fig 2 3 is used to remind the user that a CPU rate that differs from IIC protocol may cause the ISP functions to fail press the...

Page 42: ...equires two command numbers and the commands must be keyed in sequentially 7C 4C 77 The command numbers and commands must be set by the user while coding For more details please refer to section 6 boo...

Page 43: ...e fig3 1 9 2 If user change the MTV type it must load file again or the buffer of load file will be cleared 9 3 CRC cyclic redundancy check the host can check CRC register s result instead of reading...

Page 44: ...d the MCU content it is according to program the boot code while coding The limitation is used for the security of customer s code Select Read Target item and press button the MCU content will show as...

Page 45: ...11 Re entry the ISP Mode When you couldn t select or click Reset MCU button and enter ISP mode again you ll see the message as below ViewSonic Corporation Confidential Do Not Copy VA721 2 42...

Page 46: ...id the error message display 2 If you using the MTV312M64 or before MCU serials the MCU will always in ISP Mode even Programming fail or erase MCU that instead of select or press Reset MCU ViewSonic C...

Page 47: ...or in PE bag seal the with tape Figure 2 Figure 1 Figure 2 11 3 Put the cushion on the monitor Figure 3 11 4 Put the monitor into carton put all the accessories into the carton Then close the carton F...

Page 48: ...aps Figure 5 12 2 Lay VE710s b down take off the screws to remove the base Figure 6 Figure 5 Figure 6 12 3 Remove the screw cover Figure 7 12 4 Take of the screws Figure 8 Figure 7 Figure 8 ViewSonic...

Page 49: ...s on the B B Figure 11 12 8 Remove the B B from the front bezel Figure 12 Figure 11 Figure 12 12 9 Tear off the AL foil all cables on M B lamp wires Figure 13 12 10 Take off the screws on the PCB hold...

Page 50: ...ut the PCB holder up side down remove the screws on the power board Figure 17 12 14 Remove the power board Figure 18 Figure 17 Figure 18 12 15 Separate the bezel panel with BKT remove the cable on pan...

Page 51: ...1 No Power 6 Troubleshooting Flow Chart ViewSonic Corporation Confidential Do Not Copy VA721 2 48...

Page 52: ...2 No Characters Missing Color 3 Always show NO SIGNEL ViewSonic Corporation Confidential Do Not Copy VA721 2 49...

Page 53: ...07080 LCD panel 1 17 Screw M SCW 0824 6800 MM30060IBJ8 SCREW M3 0 6 0 I NI GP 7 7 7 18 Screw M SCW 0824 6802 MM30040IBJ9 SCREW M3 0 4 0 I NI GP 10 10 10 19 LCD film L7VC M MS 0808 7399 JXL7V003017 LCD...

Page 54: ...REW M3 5 8 B NI WASHER 1 33 M SCW 0824 6800 MM30060IBJ8 SCREW M3 0 6 0 I NI GP 7 34 M SCW 0824 6801 MF40080PBJ6 SCREW F4 0 8 P NI 2 35 M SCW 0824 6802 MM30040IBJ9 SCREW M3 0 4 0 I NI GP 10 36 M CV 083...

Page 55: ...0004010 LCD MYLAR L70L E FCL70004 REV3A GP 1 31 M MS 0808 9248 FCL7A001014 AL FOIL L7A FCL7A001 REV3A GP 2 32 M MS 0808 7302 FCL7V012016 P B MYLAR DOWN L7VC FCL7V012 REV3A GP 1 33 M MS 0808 9249 JXLM7...

Page 56: ...3B GP 1 72 N A HFL7V009018 SPACE PLATE L7VC HFL7V009 REV3B GP 0 028 73 M MS 0808 7399 JXL7V003017 LCD FILM L7VC JXL7V003 REV3B GP 1 74 M LB 0813 1043 HCL70021011 HI POT LABEL L70L HCL70021 REV3A GP 1...

Page 57: ...08 7302 FCL7V012016 P B MYLAR DOWN L7VC FCL7V012 REV3A GP 1 31 M MS 0808 9249 JXLM7002011 FOIL LM7S JXLM7002 REV3B GP 1 32 M SCW 0824 6797 MF40080BJ29 SCREW F4 0 8 B BNI GP 3 33 M SCW 0824 6798 MM3008...

Page 58: ...03 REV3B GP 1 72 M LB 0813 1043 HCL70021011 HI POT LABEL L70L HCL70021 REV3A GP 1 73 DC 00004814 HCL7V022011 CARTON STICKER L7VC HCL7V022 REV3A GP 1 74 M 00003446 HCL7V023018 WARRANTY STICKER L7VC HCL...

Page 59: ...8 Exploded Diagram And Spare Parts List ViewSonic Corporation Confidential Do Not Copy VA721 2 56...

Page 60: ...1 22 M BK 0805 0127 FAL7V016010 LCD BKT L L7VC 1 23 M BK 0805 0128 FAL7V017016 LCD BKT R L7VC 1 24 M MS 0808 9248 FCL7A001014 AL FOIL L7A 2 25 M MS 0808 7302 FCL7V012016 P B MYLAR DOWN L7VC 1 26 M MS...

Page 61: ...K 0805 0127 FAL7V016010 LCD BKT L L7VC 1 23 M BK 0805 0128 FAL7V017016 LCD BKT R L7VC 1 24 M MS 0808 9248 FCL7A001014 AL FOIL L7A 2 25 M MS 0808 7302 FCL7V012016 P B MYLAR DOWN L7VC 1 26 M MS 0808 924...

Page 62: ...805 0127 FAL7V016010 LCD BKT L L7VC 1 23 M BK 0805 0128 FAL7V017016 LCD BKT R L7VC 1 24 M MS 0808 9248 FCL7A001014 AL FOIL L7A 2 25 M MS 0808 7302 FCL7V012016 P B MYLAR DOWN L7VC 1 26 M MS 0808 9249 J...

Page 63: ...ty 1 N A 1L7VCZXVS02 VA721 2 LCD MONITOR 1 2 P FM 0602 0840 HBL7V005019 END CAP L 1 3 P FM 0602 0841 HBL7V006015 END CAP R 1 4 DC 00005179 HGL7VC04011 QSG VA721 1 5 A PC 0106 0224 DM333181G97 POWER C...

Page 64: ...M 24C08 CPU MTV312V64 17 Panel Backlight Power Board Backlight Control Inverter ON OFF Keypad Switch Si2301DS ISP Crystal 11 0592MHz SCL SDA RST IRQ CSZ Brightness 5V 12V DDC SCL DDC SDA LVDS1 LVDS1 L...

Page 65: ...12V MC34063 MC34063 AIC1739 2 Power 12V 5V 2 5V 3 3V ViewSonic Corporation Confidential Do Not Copy VA721 2 62...

Page 66: ...OM 24LC16 3 3V LCDPWR_ON5 0V POWER LCDVCC 3 3V 3 3V 2 5V AIC1739 2 5V QDI LCD PANEL 17 LVDS 5 0V SCALAR MST8111A LVDS AC 100 240Vac INVCTRL 3 3V 3 3V BRIGHTNESS 12V 34063 34063 5 0V 10 Schematic Diagr...

Page 67: ...NC C1 0 047u 6 D1 BAT54C GS08 NC C13 33P 6 D12 Z5 6 NC 2 1 D16 Z5 6 NS 2 1 D5 Z5 6 NC 2 1 CN1 VGA NC 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 16 17 C5 NC D6 Z5 6 NC 2 1 R16 2K 6 NC D3 DAN217K NC 1 2 3 D7 Z...

Page 68: ...05 116 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 6...

Page 69: ...17K 1 2 3 D26 EC10QS04 2 1 Q2 MMST3906 R105 33K 6 NC 1 2 R64 0 6 R98 100 6 C59 0 1U 6 1 2 L20 BC0610R6H B246 2_5 NC U4 24LC08B 1 2 3 4 5 6 7 8 A0 A1 A2 VSS SI SCK WP VCC R47 100 6 R55 10K 6 NC D34 DAN...

Page 70: ...3 0 1206 C76 2200P 6 1 2 R87 33K 6 C73 2200P 6 NC 1 2 1 1 C77 2200P 6 1 2 R75 10K 6 Q8 DTC144EUA NC 2 3 1 U7 MC34063 NC 1 2 3 4 5 6 7 8 SWITCH EMITTER TIMING GND CII VCC SENSE DRIVE CN7 AF750B A2G1T N...

Page 71: ...4 5 SW3 HDK632A 1 3 2 4 5 CN1 4500 10 8P R 1 2 3 4 5 6 7 8 SW5 HDK632A 1 3 2 4 5 SW2 HDK632A 1 3 2 4 5 LED1 EL 209 2EGW A1 C A2 SW4 HDK632A 1 3 2 4 5 ViewSonic Corporation Confidential Do Not Copy VA...

Page 72: ...11 PCB Layout Diagrams Main board Control board ViewSonic Corporation Confidential Do Not Copy VA721 2 69...

Page 73: ...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 Exc...

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