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ViewSonic VA1912w-3 Service Manual

19” color tft lcd display
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Service Manual

ViewSonic VA1912w-3
VA1912wb-3
Model No. VS10866
19" Color TFT LCD Display
(VA1912w-3_VA1912wb-3_SM Rev. 1a Aug. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VA1912w-3 VA1912wb-3 Model No. VS10866 19” Color TFT LCD Display (VA1912w-3_VA1912wb-3_SM Rev. 1a Aug. 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 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 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 4: Precautions And Safety Notices

    (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 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 5: Viewsonic Corporation

    Take out the monitor by grasping the LCD panel. That may cause “ MURA“. Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects . That could scratch the surface of panel ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 6: Specification

    2. Specification 2.1 INSTRUCTION FEATURES VA1912w-3 / VA1912wb-3 Size 19” wide Luminance (Typ, cd/㎡) 300 cd/㎡ Contrast Ratio (Typ) 700:1 TFTLCD PANEL Colors ( 6 bit + 2 bit FRC) 16.2 M colors Response Time (Typ) 8 ms Viewing Angle (H/V) 150 °...
  • Page 7 1280 x 960, 1280 x 1024, 1440 x 900 Resolution Compatibility * The image vertical size might not be full screen. But the image vertical position should be at the center. Exclusions Not compatible with interlaced video ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 8 Color = Black Power Saving Operation(Method) VESA DPMS Signaling ON Mode < W (max) / W (typ) Power Consumption ACTIVE OFF < ON Mode = N/A, ACTIVE OFF < 5 sec Recovery Time ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 9 1280 x 1024 @ 60Hz, 63.4kHz 1280 x 1024 @ 75Hz, 79.97kHz 1280x 768 @ 60Hz, 47.78kHz 1280 x 960 @60Hz, 60kHz 1440 x 900 @ 60Hz, 55.96kHz *The image vertical size might not be full screen. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 10 Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode [1] + [▼] + [▲] White Balance. (Not shown on user’s guide) [1] + [▼] Power Lock [1] + [▲] OSD Lock [ X] Audio Mute on /off ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 11 , Mute* Color Adjust sRGB, 9300K, 6500K(default), 5400, 5000, User Color [R, G, B] Information H Frequency, V Frequency, Resolution, Pixel Clock, Serial Number, Model Number, “www.ViewSonic.com” Manual Image Adjust H. Size* , H./V. Position* , Fine Tune* , Sharpness*...
  • Page 12 Connector PC99 requirement Audio in Cable type / length 3.5mm stereo cable / 1.8m length NOTE: THERE IS NO GUARANTEE <1 W POWER Audio DPMS CONSUMPTION IN ACTIVE OFF MODE, WHEN THE AUDIO CABLE IS CONNECTED ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 13: Front Panel Function Control Description

    Also a shortcut to toggle analog and digital connection. Audio Mute Power light button turns Green = ON the sound off Orange = Power Saving Standby Power On/Off ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 14 • 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.) ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 15: Main Menu Controls

    Enabling this setting allows the LCD display to more accurately display colors the way they were originally intended. Enabling the sRGB setting will cause the Contrast and Brightness adjustments to be disabled. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 16 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 17 Sharpness adjusts the clarity and focus of the screen image. Setup Menu displays the menu shown below: Language Select allows the user to choose the language used in the menus and control screens. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 18 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. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 19: Circuit Description

    The TSUM57AK also incorporates a new Dynamic Frame Rate (DFR) generator for the digital output video to the display panel that preserves the advantages of a fixed output clock rate, while eliminating the output end of frame short-line. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 20: Adjustment Procedure

    Full Screen 50% White (Gray) Inspection Item: Bright Dot, Particle, Line Defect & Mura 9. White Box Test Signal: 1280*1024@60Hz Test Pattern: Window standard pattern Inspection Item: Particle, Line Defect, Power, Image Remain & Mura ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 21 Full Screen 50% Red Figure 4 Green Full Screen 50% Green Figure 5 Blue Full Screen 50% Blue Figure6 White Full Screen White Figure7 Black_Tile Black Tile Under White Background Figure 8 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 22 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 23 Take the cable of Print Port to connect Print Port of PC and Print Port of fixture(and EDID burn in the same fixture) to connect VGA Cable between D-sub of fixture and D-sub of AD Board of monitor，the monitor must be turned on the power。 Step 2 : Open ISP Tool ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 24 ”確定”。 Step 4: Press ”Read” then enter as below figure，then press to down load the program of BIOS (*.bin)。 If down load BIOS that is successful as below figure then press”確定”。 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 25 BIOS procedure。 The BIOS procedure is displayed the message ”Verify OK” that the BIOS procedure is successful。 Step 6 : Press ”Dis Con” then leave the mode of ISP。 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 26 Step 7： When select ”ReConnect” and press “Run” then repeat to connect the mode of ISP into next the action of BIOS procedure ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 27 1.4 Place the monitor into the carton and then put all the accessories into the carton. As last, close the carton and seal it with tape. (Figure 4) Figure 4 Figure 3 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 28 Step 1 : Remove the Seat Assy Step 2 : Remove the Stand Cover. Step 3 : Loose and remove 4 screws Step4 : Remove the Stand Assy Step 5 : Completed. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 29 Separate Bezel hooks to take Bezel and Rear Cover apart. Step 1 : Loose and remove 2 screws. Step 2 : Separate Bezel hooks to take Bezel and Rear Cover apart. Step 3 : Remove Rear Cover. Step 4 : Completed. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 30 Loose and remove 4 screws. Step 3 : Lift up LCD module and remove bezel. Step 4 : Remove 2 pieces of Backlight wires. Step 5 : Remove 2 pieces of Backlight wires. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 31 Step 6 : Loose and remove 2 screws. Step 7 : Loose and remove 2 screws. Step 8 : Loose and remove 4 screws. Step 9 : Remove the PCBA Cover ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 32 Loose and remove 4 screws. Step 2 : Remove Lips Board Step 3 : Remove 2 pieces of FFCs. Step 4 : Remove the FFC. Step 5 : Loose and remove 4 screws. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 33 Step 1 : Place new AD Board. And fasten 4 fixed screws. Step 2 : Fasten 4 fixed screws. Step 3 : Insert FFC. Step 4 : Insert 2 pieces of FFCs . ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 34 Step 5 : Insert new Lips Board. Step 6 : Fasten 4 fixed screws. Step 7 :Completed. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 35 5. Remove OSD Board Step 1 : Separate both Audio Cable. Step 2 : Take OSD Board apart. Step 3: Completed. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 36 Insert Audio cable to connectors of New OSD Board. Step 3: Completed. 7. Add Cover to AD PCB Heatsink Step 1 : Join the PCB Cover. Step 2 : Fasten 4 fixed screws. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 37 Step 4 : Fasten 2 fixed screws. Step 5 : Insert 2 pieces of Backlight wires. Step 6 : Insert 2 pieces of Backlight. wires. Step 7 : Join LCD module and remove bezel. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 38 Insert FFC. Step 10 : Completed. 8. Rear Assy & Stand Assembly Step 1 : Place Rear Cover. Step 2 : Fasten 2 fixed screws. Step 3 : Place the Stand Assy. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 39 Step 4 : Fasten 4 fixed screws. Step 5 : Join the Stand Cover. Step 6 : Join the Seat Assy Step 7 : Completed. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 40: Troubleshooting Flow Chart

    Bright Dot Display Dark Dot Backlight Light Leakage Mura Panel Change Check Panel Image Sticking Brightness spot Particle Dot Defect Image Remain Group Bright Dots Others Cosmetics Defect TEST Next Step Completed ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 41 Check Panel Panel Change Beat Display Shut Down AD/B Change Display Wave Check PCBA Power/B Change CNT/B Change Panel Change Check Panel No Backlight Check Adapter Adapter Change TEST Next Step Completed ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 42 Check Adapter Adapter Change No signal AD/B Change Check PCBA CNT/B Change R.G.B Display Abnormal VGA cable Check Wire Gray Scale DVI cable Display Check Panel Panel Change Abnormal TEST Next Step Completed ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 43 Vertical Check Panel Panel Change Band Defect Horizontal Band Defect Power Saving Display AD/B Change Check PCBA Abnormal AD/B Change Power/B Change Peculiar Smell Check PCBA Inverter/B Change TEST Next Step Complete ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 44 Power/B Change LED Off Check PCBA Abnormal Inverter/B LED Dark OSD/B Change LED Abnormal OSD Cable Check Wire LED Loss DC Power CNT Cable Change LED Flicker Adapter Change TEST Next Step Completed ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 45 CNT/B Change Abnormal Power/B Change Loud Check PCBA Inverter/B Change Abnormal OSD/B Change Check Wire No Voice OSD Cable Change Loudspeaker L/R Same Check Loudspeaker Change Volume Loudspeaker Next Step TEST Noise Completed ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 46 AD/B Change Display Abnormal EDID Update Check EDID Code Check PCBA TV /B Change TV Function Check Wire Display AV Cable Change Abnormal Remote controller Check Controller Change TEST Next Step Complete ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 47 Use OSD Color Menu to adjust color setting. Dark area distorted Use OSD Color Menu to adjust color setting. White color is not white Use OSD Color Menu to adjust color setting. ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 48: Recommended Spare Parts List

    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. This is to eliminate repeated cross checks of each item between this version and prior versions.
  • Page 49 All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic Corporation. This is to eliminate repeated cross checks of each item between this version and prior ViewSonic Corporation...
  • Page 50 78-D004392 (Left), Green II Cushion, A190A2-T05, EPS, WHITE, 450 mmx160 mmx145 mm, PS FOAM P-00004296 78-D004388 (Right), Green II 79-D004425 Shipping Package Information for , A190A2-H05, ViewSonic 77-D000114 Customer Label for , A170E1-H0G 78-D011686 Carton, A190A2-H05 76-D011751 MENU for A190A2-H05...
  • Page 51 Green II Cushion, A190A2-T05, EPS, WHITE, 450 mmx160 mmx145 mm, PS FOAM P-00004296 78-D004388 (Right), Green II 79-D004425 Shipping Package Information for , A190A2-H05, ViewSonic DC-00008019 76-D011751 MENU for A190A2-H05, VA1912w/wb-3, Green II ViewSonic Corporation Confidential - Do Not Copy...

  • Page 52: Exploded Diagram And Exploded Parts List

    8. Exploded Diagram and Exploded Parts List EXPLODED PARTS LIST (VA1912W-3) EXPLODED PARTS LIST (VA1912WB-3) ViewSonic Model Number: VS10866 ViewSonic Model Number: VS10866 Rev: 1a Rev: 1a Serial No. Prefix: QBK Serial No. Prefix: QBN Item ViewSonic P/N Ref. P/N...
  • Page 53 PACKING PART LIST ( VA1912W-3 ) PACKING PART LIST ( VA1912WB-3 ) ViewSonic Model Number: VS10866 ViewSonic Model Number: VS10866 Rev: 1a Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty Item ViewSonic P/N Ref. P/N Location Q'ty LCD Monitior...

  • Page 54: Block Diagram

    9. Block Diagram Speaker OSD Key Pad / Audio Out 3.3V Main Board LCD Module D-sub Analog Video Signal DC-12V DC-5V LIPS AC Power Backlight Audio In ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 55: Schematic Diagrams

    DCDC_ON/OFF AUD_DET V12A AUD_DET V12A V33P V33P V33P V33P VOL_ADJ VOL_ADJ POWER V33C AUDIO_ON LED_GL V18C V33C V12A V12A ViewSonic Corporation INV_ON/OFF INV_ON/OFF INV_ADJ INV_ADJ Model System Diagram gram Title Date Rev: ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 56 GA P/N C119 C119 C120 C120 1206/22u/16V/Y/RoHS 1206/22u/16V/Y/RoHS 0603/100n/25V/7/RoHS 0603/100n/25V/7/RoHS BA N/P --> RA P/N V12A V12A C121 C121 C122 C122 1206/4.7u/35V/Y/E 1206/4.7u/35V/Y/E ViewSonic Corporation 0603/100n/25V/X/RoHS 0603/100n/25V/X/RoHS Model Title Panel Interface Date Rev: ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 57 R212 R212 RIGHT SAR11 SAR11 0603/23.2K/1%/OPEN 0603/23.2K/1%/OPEN 0603/1K/5% 0603/1K/5% LEFT 1.77V SAR21 SAR21 R200 R200 R139 R139 MENU POWER ViewSonic Corporation MENU 1.24V 0603/10M/5%/RoHS/OPEN 0603/10M/5%/RoHS/OPEN 0603/12.1K/1%/OPEN 0603/12.1K/1%/OPEN R201 R201 0603/12.1K/1%/OPEN 0603/12.1K/1%/OPEN 0603/10M/5%/RoHS/OPEN 0603/10M/5%/RoHS/OPEN TURBO 0.47V R134 R134 R140 R140 TURBO AUTO 0603/3.3K/1%/OPEN...
  • Page 58 TP0610K/PbF OPEN/0603 OPEN/0603 AUDIO_ON 0603/10K/5%/RoHS 0603/10K/5%/RoHS 2N7002/RoHS 2N7002/RoHS 0603/100n/25V/Y/RoHS 0603/100n/25V/Y/RoHS VOL_ADJ 0603/100n/25V/7/RoHS 0603/100n/25V/7/RoHS 2N7002/RoHS 2N7002/RoHS OPEN/0603 OPEN/0603 1206/10u/16V/5/RoHS 1206/10u/16V/5/RoHS 0603/1K/5%/RoHS 0603/1K/5%/RoHS MUTE 0603/0R/5%/RoHS/OPEN 0603/0R/5%/RoHS/OPEN ViewSonic Corporation Model Inverter Interface Title Date Rev: ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 59 Heat-Sink Vref (POWER FOR SCALER) V33P1 V33P1 FBMJ2125HS420/PbF FBMJ2125HS420/PbF LM1117MPX-3.3/RoHS LM1117MPX-3.3/RoHS V33P V33P VOUT VOUT (Panel VCC) 1206/22u/16V/Y/RoHS 1206/22u/16V/Y/RoHS 0603/100n/25V/7/RoHS 0603/100n/25V/7/RoHS 1206/22u/16V/Y/RoHS 1206/22u/16V/Y/RoHS 0603/100n/25V/7/RoHS 0603/100n/25V/7/RoHS ViewSonic Corporation Model POWER Title Date Rev: ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 60 BAV70W/RoHS BAV70W/RoHS 0603220KV05T/RoHS 0603220KV05T/RoHS 0603/100n/25V/7/RoHS 0603/100n/25V/7/RoHS C129 C129 R135 R135 0603/10K/5%/RoHS 0603/10K/5%/RoHS 0603/100n/25V/X/RoHS 0603/100n/25V/X/RoHS BZT52-C5V6S/RoHS BZT52-C5V6S/RoHS R136 R136 0603/3.9K/5%/RoHS 0603/3.9K/5%/RoHS VGA_5V VCLK 0603/47K/5%/RoHS 0603/47K/5%/RoHS AT24C02-10TU-1.8/RoHS AT24C02-10TU-1.8/RoHS ViewSonic Corporation Model Title Date Rev: ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 61 LED_OR 2N7002/RoHS/OPEN 2N7002/RoHS/OPEN 0603/100n/25V/Y/RoHS/OPEN 0603/100n/25V/Y/RoHS/OPEN 0603/249R/1%/RoHS 0603/249R/1%/RoHS LED_O V33C V33C 0603/1K/5%/RoHS/OPEN 0603/1K/5%/RoHS/OPEN 0603/10K/5%/RoHS 0603/10K/5%/RoHS 0603/0R/5%/RoHS 0603/0R/5%/RoHS TP0610K/PbF TP0610K/PbF LED_GL 2N7002/RoHS/OPEN 2N7002/RoHS/OPEN 0603/249R/1%/RoHS 0603/249R/1%/RoHS 0603/100n/25V/Y/RoHS/OPEN 0603/100n/25V/Y/RoHS/OPEN ViewSonic Corporation LED_G Model Title Date Rev: ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...

  • Page 62: Pcb Layout Diagrams

    11. PCB Layout Diagrams ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 63 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 64 ViewSonic Corporation Confidential - Do Not Copy VA1912w-3_VA1912wb-3...
  • Page 65 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) ViewSonic Corporation Confidential - Do Not Copy...

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Va1912wb-3Vs10866

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