ViewSonic VA1930wm-1 Service Manual
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ViewSonic VA1930wm-1 Service Manual

19” color tft lcd display
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Service Manual

ViewSonic VA1930wm-1
Model No. VS11354
19" Color TFT LCD Display
(VA1930wm-1_SM Rev. 1a Nov. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VA1930wm-1 Model No. VS11354 19” Color TFT LCD Display (VA1930wm-1_SM Rev. 1a Nov. 2006) 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

    Specification Front Panel Function Control Description Circuit Description Adjustment Procedure Troubleshooting Flow Chart Recommended Spare Parts List Exploded Diagram and Exploded Parts List Block Diagram 10. Schematic Diagrams 11. PCB Layout Diagrams VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 4: Precautions And Safety Notices

    Keep wires away from high voltage, high temperature components and sharp edges. Keep wires in their original position so as to reduce interference. Adjustment of this product please refers to the user’ manual. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 5 4. Handling and Placing Methods VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 6 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 7: Specification

    UL, CUL, FCC-B (ICES), CB, CE, TCO'03, ICES-003B, ISO13406-2, TUV/GS, TUV ERGO(covers Regulation ISO13406-2 & MPRII), TUV-S, NOM, GOST-R, HYGIENIC (20 copies), ENERGY, Energy Star, CCC, BSMI, PSB, C-TICK, KTL/MIC, SASO, WEEE, RoHS VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 8: General Specification

    Shall start and function properly when under full load, with Power Supply Cold Start all combinations of input voltage, input frequency, and operating temperature Power Supply Transient Immunity Shall be able to withstand an ANSI/IEEE C62.41-1980 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 9 On Mode = N/A, Active Off < 3 sec ELECTRICAL REQUIREMENT Horizontal / Vertical Frequency 30 – 82 kHz Horizontal Frequency 50 – 75* Hz. Vertical Refresh Rate Maximum Pixel Clock 135 MHz Sync Polarity Independent of sync polarity. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 10: Timing Table

    Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when execute “Auto Image Adjust”. The monitor needs to do “Auto Image Adjust” the first time when a new mode is detected. (See section “0-Touch™ Function Actions”) VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 11 No signal + [ ] + [2] Burning mode + Main Power on Signal + [2] + [ ] + Main Power Factory Mode Remark : All the short cuts function are only available while OSD off VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 12: Main Menu Controls

    2. For auto input select function, it shall meet the requirement in Appendix D. 3. The OSD should disappear after 10 sec or by pushing button [1] or [2] Resolution Notice function should be disabled when push button [2] under Resolution Notice OSD VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 13 2. It should be reset by Memory Recall function(Should not reset by power off, power unplug and others) OSD Auto Save The OSD shall save new settings when it is turned off by the user or when it times out. There shall not be a separate save VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 14: Front Panel Function Control Description

    Scrolls through menu options and adjusts the displayed control. Also a shortcut to display the Contrast adjustment control screen. Displays the control screen for the highlighted control. Also toggles between two controls on some screens. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 15 • If necessary, make small adjustments using H. POSITION and V. POSITION until the screen image is completely visible. (The black border around the edge of the screen should barely touch the illuminated “active area” of the LCD display.) VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 16 7500K-Adds blue to the screen image for cooler white (used in most office settings with fluorescent lighting). 6500K-Adds red to the screen image for warmer white and richer red. 5400K-Adds green to the screen image for a darker color. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 17 Preset Timing Mode, colors return to the 6500K factory preset. Information displays the timing mode (video signal input) coming from the graphics card in the computer, the LCD model number, the serial number, and the ViewSonic website URL. See your graphics card’s user guide for ®...
  • Page 18 OSD Timeout sets the length of time the OSD screen is displayed. For example, with a “30 second” setting, if a control is not pushed within 30 seconds, the display screen disappears. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 19 OSD Background allows the user to turn the OSD background On or Off. Memory Recall returns the adjustments back to factory settings if the display is operating in a factory Preset Timing Mode listed in the Specifications of this manual. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 20: Circuit Description

    OVP Protect Circuit: When output is overvoltage, the auxiliary winding voltage will be increased, when it reaches about 14V. Q803 is triggered . It makes the IC802 Pin 1 exceed 5V, then the IC802 output will be disabled. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 21: Inverter Circuit

    86 generates a PWM waveform by regulating the duty to control the brightness of the backlights. U103 is EEPROM used for saving EDID data, which is connected by SCL and SDA pins with # 31 and # 30 of TSUM56AL-LF-1. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 22: Vga Input

    LED indicator is green. b. When in power-saving mode, U105 # 91 is pulled high and U105 # 92 is pulled down, so Q105 is conducted and the LED indicator is orange. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 23 1312 1024 78.750 1024*768@75Hz 75.029 VESA 68.677 1376 1024 94.500 1024*768@85Hz 84.997 − 57.700 1360 1024 1024*768@72Hz 78.472 − 72.125 VESA 67.500 1600 1152 108.000 1152*864@75Hz 75.000 − 100.000 68.681 1456 1152 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 24 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 0.5~10 >200 >100 0~50 0.1~25 >1000 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 25: Ac Outlet Pin Assignment

    DC power on/off control, KEY_UP&▲ OSD “▲” control to adjust value to increase, KEY_DOWN&2 Select control and auto adjustment control, OSD “▼” control to adjust value to decrease KEY_1 OSD menu and exit VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 26 Symbol Red video input Red GND Green video input Green GND Serial data (SDA) Blue video input Blue GND H / H+V SYNC +5V(from PC) VSYNC Cable Detect Data clock line (SCL) VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 27 Over-voltage/over-current protection threshold setting pin ON/OFF control of IC Timing capacitor to set internal PWM dimming frequency and also a pin for analog dimming selection SSTCMP Capacitor for soft start time and loop compensation VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 28 Transmitter/GPIO DDC Clock for Analog Interface/UART DDCA_SCL/RS232_RX Receiver/GPIO VDDP Digital Output Power Ground VDDC Digital Core Power General Purpose Input/Output; 4mA driving GPIO_P15/PWM0 strength/Pulse Width Modulation Output; 4mA driving Not Connected VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 29 B-Link Positive LVDS Differential Data Output LVB2M B-Link Negative LVDS Differential Data Output LVB1P B-Link Positive LVDS Differential Data Output LVB1M B-Link Negative LVDS Differential Data Output VDDP Digital Output Power Ground VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 30 General Purpose Input/Output; 4mA driving strength Crystal Oscillator Input XOUT Crystal Oscillator Output AVDD_MPLL MPLL Power General Purpose Input/Output; 4mA driving strength/ GPIO_P16/PWM2 Pulse Width Modulation Output; 4mA driving strength Not connected VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 31: Adjustment Procedure

    *3,4 Contrast/Brightness Brightness (+ / -) *3,4 Volume Volume (+ / -) Audio Mute On/Off Color Adjust sRGB 9300K 7500K 6500K 5400K User Color Red (+ / -) Green (+ / -) VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 32 Status 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 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 33 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. VA1930wm-1 ViewSonic Corporation...
  • Page 34 7.1 Connect ISP board between monitor and PC as below configure LCD Monitor Service D-Sub cable ISP Board Insert to Print Port 25pin 7.2 Using mStar ISP Tool Update FW: (1). Seletct “Read”, Choose the corresponding firmware, load to MCU. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 35 (2). Select “Connect”, auto connect for ISP. (3). Select “Run”, start ISP. (4). When the picture show “Verify OK”, ISP finished. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 36 Power Check power consumption at each modes Power saving meter State Power Consumption LED color AC input: 230V/50Hz Normal ≤ 42W Green Stand By < 2W Orange Power Key Off ＜1Ｗ VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 37 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 3) Monitor Head VGA cable Power cord Audio cable Figure 3 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 38: Disassembly Procedure

    Disassembly Procedure Adjust Stand VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 39 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 40 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 41 Power Board I/F Board Chassis Speaker LVDS Cable P-Led Cable Function Key OSD Board Bezel Hold VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 42: Troubleshooting Flow Chart

    If you find the vertical line or horizontal line lost on the screen, please change panel. If you find the speaker don’t working, please don’t plug in audio cable, unless change new speaker. VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 43 Check pin6 of IC802 CheckC810,D803,C807, voltage about 12V Check pin2 of IC802 Check primary OVP, OLP voltage about 2V and secondary feedback, Check R811, R810, Check pin1 of IC802 R809, R808,R814 voltage is below 1V VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 44 Check R819, R820 Check pin2 of Check R818, D804, IC802 voltage C807 if short is 3V Change R818, D804, Check pin1 of Change R808, R 809, IC802 voltage R810, R 811, R815, below 1V VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 45 Check R809, R808, R814, D809 Check pin1 of Check D806, C815 if IC802 voltage short is 5.8V Change D806, C815 Check pin3 of Change R801, R805, IC802 voltage R822, R823, R817 about 1V VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 46 Check reset (pin84) of Check C144,R172 U105 Check crystal (pin 96,97) Check waveform of U105 X101,C153,C154 Check CCFL- Check pin4 of Enable(pin 85) Inverter Fail CN101 of U105 Check R167,Q106, U105 FAIL R108,R110 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 47 Black Screeqn and backlight turn on VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 48 White Screen White screen LVDS Cable Workmanship Reinsert Change LVDS cable NG LVDSCable Check VLCD Check LVDS Panel Fail is 5V signal Check Panel-Enable of U105 Fail U105(pin48) Check Q101,Q103,Q110, C108, C109 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 49 Bad Screen Bad Screen LVDS Cable Workmanship Reinsert Change LVDS LVDS Cable NG Cable Check Crystal: CheckX101, C153, pin96,97 of U105 C154 Check the pins of U105 VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 50: Recommended Spare Parts List

    Remark 1: Above listed items are examples, supplier can expand the rows to add more necessary items. Remark 2: All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation.

  • Page 51: Viewsonic Corporation

    BOM LIST (VA1930wm-1) ViewSonic Model Number: VS11354 Rev: 1a Serial No. Prefix: QFP Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty P-00008167 506040009710R CUSHION,EPS-R, LE1945 P-00008168 506040009700R CUSHION,EPS-L, LE1945 506039000100R CORNER PAPER,1000x50x50xT5mm 5.556 506037005900R CARDBOARD,COVER,L1160xW1150xH120mm,LE194 2.778 CB-00008002 453030300120R...

  • Page 52: Exploded Diagram And Exploded Parts List

    8. Exploded Diagram and Exploded Parts List VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...
  • Page 53 EXPLODED PARTS LIST (VA1930wm-1) ViewSonic Model Number: VS11354 Rev: 1a Serial No. Prefix: QFP Item ViewSonic P/N Ref. P/N Description Q'ty C-00008181 714030007410R ASSY,BEZEL,NO silkscreen,LE1945 501010207710R BEZEL, Front,NO silkscreen,LE1945 501030204300R Button,Power key,LE1941 501120104400R LENS, LE1941 501060200500R holder,Keypad,LE1941 501030204400R button,function key,LE1941 509112306100R SCREW,P,CROSS T.T-3*6,Zn,ROHS...
  • Page 54 PACKING PART LIST (VA1930wm-1) ViewSonic Model Number: VS11354 Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty 506431000300R FILM,PE 500mmx900M ROHS 1/32 506039003600R CORNER PAPER,1980x50x50xT5mm 0.125 506039000100R CORNER PAPER,1000x50x50mmxT5mm 0.125 P-00008167 506040009710R CUSHION,EPS-R, LE1945 CB-00008002 453030300120R CABLE,AUDIO 1P 6FT BLACK/GREEN CP03B06P0...

  • Page 55: Block Diagram

    9. Block Diagram VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

  • Page 56: Schematic Diagrams

    R191 R106 R162 LED_A_C Q102 R101 LED_A//LED_B PMBT3906 CN105 LED_A//LED_B LED_G//LED_O POWER MENU_UP//Key_Mute&▲ DOWN_EXIT//Key_▼&2 KEY_1 C161 C162 2x4P 2.0mm From keypad 1000p/50V 1000p/50V ViewSonic Corporation Model Title DC to DC Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 57 BAV99 BAV99 BAV99 BAV99 BAV99 BAV99 D103 DVI5V PC5V_VGA VCC3.3 VCC3.3 D102 BAV70 BAV70 C128 U103 0.1/50V U104 DDCA_SCL R151 DDCA_SDA SCL_DVI SDA_DVI CAT24WC02W ViewSonic Corporation CAT24WC02W Model Title INPUT Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 58 60Ω LVA3M VCC5V LVA3P C144 10u/25V R170 VLCD R171 C140 X101 R172 1u/16V 14.31818MHz VCC3.3 U108 U109 R178 100 I2C_MCL HDCP_WP I2C_MDA ViewSonic Corporation R179 AT24C04N AT24C04N/NC Model SCALER Title Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 59 SW901 SW902 SW903 SW904 SW905 SW906 SW TACT SW TACT SW TACT SW TACT SW TACT SW TACT MUTE ▼ POWER ViewSonic Corporation Model Keypad & Power key Title Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 60 Q703 R705 PMBT3904 Volume R708 R707 Q701 MUTE PMBT3904 +14V R713 C701 change to 220uF from 470uF for svr rise up earlier R714 Q702 PMBT3904 ViewSonic Corporation Model Audio Title Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 61 2700p/50V R501 0.1/50V SN4148 D513 SN4148 2200p/50V 100K 1% C524 R528 R533 390 1% 15K 1% R518 0.068/50V 470K 1% C518 0.1/50V R519 C519 0.1/50V ViewSonic Corporation Model Interter Title Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 62 F801 0.1/50V 2A/250V C824 C827 0.1/50V NC 47u/25V CN801 P801 VCC5V ON/OFF AC_SKT BRIGHTNESS Volume Audio_MUTE 4 60mm 8P TO SCALER BD CN101 C825 ViewSonic Corporation 0.1/50V Model Power Title Date Rev: ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...

  • Page 63: Pcb Layout Diagrams

    11. PCB Layout Diagrams ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 64 ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 65 ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...
  • Page 66 ViewSonic Corporation VG1930wm-1 Confidential - Do Not Copy...

  • Page 67: Viewsonic Corporation

    Company: Add: Tel: Fax: 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) VA1930wm-1 ViewSonic Corporation Confidential - Do Not Copy...

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