ViewSonic VX2035wm-1 Service Manual
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ViewSonic VX2035wm-1 Service Manual

ViewSonic VX2035wm-1 Service Manual

20” color tft lcd display
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Service Manual

ViewSonic VX2035wm-1
Model No. VS11435
20" Color TFT LCD Display
(VX2035wm-1_SM Rev. 1a Nov. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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Summary of Contents for ViewSonic VX2035wm-1

  • Page 1: Service Manual

    Service Manual ViewSonic VX2035wm-1 Model No. VS11435 20” Color TFT LCD Display (VX2035wm-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

    Front Panel Function Control Description Circuit Description Adjusting Procedure Trouble Shooting Flow Chart Block Diagrams Schematic Diagrams PCB Layout Diagrams 10. Exploded Diagram And Spare Parts List 11. Recommended Spare Parts List ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 4: Precautions And Safety Notices

    Power Source (IEC60950 or UL1950), or be applied exemption. (14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 5 Place the monitor on a clean and soft foam pad. Placing the monitor on foreign objects. That could scratch the surface of the panel or cause “Mura” The panel is placed facedown on the lap. That may cause “Mura” ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 6: Specification

    Shall start and function properly when under full load, Power Supply Cold Start with all combinations of input voltage, input frequency, and operating temperature rms Power Supply Transient Immunity Shall be able to withstand an ANSI/IEEE C62.41-1980 ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 7 70 Hz, 31.5 KHz For Analog sync, OSD will be 640x350/640x400/720x400 (primary= 720x400). 640 x 480 50 Hz, 24.7 KHz 640 x 480 60 Hz, 31.5 KHz For Analog sync, switch 640x400@60Hz and ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 8 *2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message with blanking. *3. The image quality of 85Hz mode might be worse than 75Hz. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 9 Volume* , Mute* Color Adjust SRGB, 9300K,7500K, 6500K(default), 5400,User Color [R, G, B] Information [H Frequency, V Frequency, Resolution, Pixel Clock, Serial Number, Model Number, [“www.ViewSonic.com” ] Manual Image Adjust Horizontal Size* , H/V. Position* , Fine Tune* , Sharpness*...
  • Page 10 Speakers stay off when the rest of the monitor is in power saving Audio DPMS Note: There is no guarantee <1 W at power consumption in Active Off mode, when the Audio Cable is connected ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 11 160 º Minimum: TBD º Response Time Typical = 5ms (Tr = 3.6ms,Tf = 1.4ms) 10%-90% @ Ta=25°C Maxmum = 8ms (Tr = 5.7ms,Tf = 2.3ms) Panel Defects Please see Panel Quality Specifications. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 12: Front Panel Function Control Description

    Adjust. Scrolls through menu options and adjusts the displayed control. Displays the Main Also a shortcut to display Menu or exits the the Contrast adjustment control screen and control screen. saves adjustments. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 13 • 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 VX2035wm-1 Confidential - Do Not Copy...

  • Page 14: Main Menu Controls

    Color Adjust provides several color adjustment modes, including preset color temperatures and a User Color mode which allows independent adjustment of red (R), green (G), and blue (B). The factory setting for this product is 6500K (6500 Kelvin). ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 15 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 16 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 VX2035wm-1 Confidential - Do Not Copy...
  • Page 17 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 VX2035wm-1 Confidential - Do Not Copy...

  • Page 18: Circuit Description

    　   F ixed Last Line output for perfect panel capability 　 Host Interface  S upport MCU serial/parallel bus interface. 　  S upport MCU dual edge data latch. 　 ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 19 There are two main independent auto-adjustment functions supported by RTD, including auto-position & auto-tracking. The operation procedure is as following; Auto-Position 1. Define the RGB color noise margin: When the value of color channel R or G or B is greater than ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 20 0.1V. For application, we can select different threshold voltage by the polarity of the HSYNC. The control register is CR97 Crystal Frequency Output RTD can output crystal frequency or 1/2 crystal frequency to external MCU to save a crystal device. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 21 A chip-level shutdown control limits total supply current to 1 µA, making the device ideal for battery-powered applications. Protection circuitry in creases device reliability: thermal and short ircuit. Under voltage shutdown saves battery power for more essential devices when battery voltage drops to low leve. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 22: Adjusting Procedure

    1024 x 768 @ 85Hz, 68.7 kHz 27. 1152 x 864 @ 75Hz, 67.5 kHz 1152 x 864 @ 75Hz, 67.5 kHz 28. 1152 x 870 @ 75Hz, 68.7 kHz 1152 x 870 @ 75Hz, 68.7 kHz ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 23 42. 1600 x 1200 @ 60Hz, 75 kHz 1600 x 1200 @ 60Hz, 75 kHz 43. 1680 x 1050 @ 60Hz, 64.7 kHz 1680 x 1050 @ 60Hz, 64.7 kHz 1.4.2 Function Test Display Pattern ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 24 Gray Scale Pattern (Figure2) 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) ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 25 (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. 1.5.7 White Balance ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 26 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. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 27 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. I. ISP Download program procedure 1 Hardware Connect status: 2 Down load isp program Step 1: Execute ISP.exe ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 28 The connecting status between ISP status and Monitor. Turn off the power of monitor (AC plug off ) and disconnect the D-Sub connector . To connect the D-Sub connector and then turn on the power of monitor.(AC plug on) ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 29 2.Barcode Reader connect with keyboard and PC keyboard port. 3.Connect RS-232 Cable and VX2035WM1 with VGA Cable. 4.(when key in DVI DDC information, use VGA transform to DVI port ) 5.Connect Power Cord to VX2035WM1 Monitor. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 30 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(VX2035WM1A.DAT press“ENTER” key) VX2035WM1_A means the DDC under analog mode. VX2035WM1D means the DDC under digital mode. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 31 6.Key in the serial number or use the barcode reader to scan the barcode of the monitor, and press “ENTER” key. 7.The successful picture is as follows. ”Compare EDID ：OK! Press any key to continue”. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 32 At last, close the carton and seal it with tape. (Figure 5) 1.Power Cord 2.VGA Cable 3.DVI Cable 4.EAR Cable 5.User’s Guide 6.Guarant Card Figure 4 Figure 5 ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 33 Disassembly Procedure Disassembly of Stand and Dust Cover from LCD TV. 1.1 Unscrew 6 screws that secure Stand Unit and detach Dust Cover from the LCD TV. Dust Cover Stand ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 34 2. Disassembly of Rear Cover. 2.1 Unscrew 9 screws to remove Rear Cover. Rear Cover 3. Disassembly of Main Board,Power Board,IR Board,Speaker,Front Cover and Panel Unit. 3.1 Unscrew 13 screws to remove Shield Plate. Shield Plate ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 35 3.2. Unscrew 2 screws and disconnect the wires to remove Main Board. Main Board 3.3. Unscrew 5 screws and disconnect the wires to remove Power Board. Power Board ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 36 3.4. Unscrew 4 screws to remove bracket fix. Bracket fix 3.5. Unscrew 8 screws to remove Front Cover. ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 37 3.6. Lay Panel Unit facedown and unscrew 4 screws on its right and left sides, to remove Panel Unit and Panel Bracket. Panel Bracket Key Poard Panel Unit ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 38: Troubleshooting Flow Chart

    6. Troubleshooting Flow Chart ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 39 6.1. NO POWER 6.2. MCU NO FUNCTION ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 40 6.3. NO DISPLAY ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 41: Block Diagrams

    7. Block Diagram ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 42: Schematic Diagrams

    3.3V DGND VDA_1V8 2,3 VOUT VOUT VOUT C125 C107 C108 C106 100nF 10uF/16V 100nF 100nF DGND DGND DGND DGND M32-D80 M32-D80 DGND DGND ViewSonic Corporation Model DC TO DC Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 43 DGND R132 hunk modify D114 D116 D118 D120 add C154 , D115 D117 D119 D121 D122 D123 Q109 Shell DGND 1,3,4,5 DGND DGND DGND DGND ViewSonic Corporation Model INPUT Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 44 BG2P / TXE3+ R135 NC R136 137 AHS1 AHS1 AHS1 / V0 AVS1 AVS1 AVS1 / VCLK DGND LVDS_CON30 R185 R151 SCL_D1 BJT_B R152 SDA_D1 GND POWER ViewSonic Corporation Model SCALER Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 45 C148 C149 C150 C151 C152 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF Q106 ORANGE P5單向 P1雙向 2N3906 R180 10K LED_ORANG DGND MTV512M-LQFP48 P6單向 雙向 X1,X2 ViewSonic Corporation Model Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 46 1UF 0805 R613 DGND correct pin define DGND DGND R614 Q602 MUTE_S MUTE_S modify value 0627 R615 MMBT3904 SOLDER DGND 1,2,3,4 SIDE DGND DGND ViewSonic Corporation Model Audio Amplifier Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 47 8.6. PLACEMENT 改 9PIN 100mm DC power IN LVDS output connector KEY connector 90mm RTD 2553V Speaker Earphone D-SUB ViewSonic Corporation Model PLACEMENT Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 48 8.7. Key Board P701 SELECT DOWN MENU LED_GREEN LED_AMBER POWER wafer 2.0mm 90 D701 S701 S702 S703 S704 S705 ViewSonic Corporation Model Key Board Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 49 OFF: 2.0V---5.0V 5.1K R953 Q906 2N3904 R920 5.1k R921 R914 5.1K 1/4WS 5.1K R915 Q911 5.1K 2N3904 Q913 Q907 R922 2N3904 5.1K R954 C915 R916 5.1K ViewSonic Corporation Model INVERTER Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 50 KSC2328 1000P C817 Q803 R825 R828 C803 C804 C814 0R F 0.1U 470pF Y2 470pF Y2 R815 R816 1206 1.8K 1206 S801 AC IN 100~240V ViewSonic Corporation Model POWER Title Date Rev: ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 51: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1. MAIN PCB TOP VIEW ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 52 9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 53 9.3. CON PCB TOP VIEW 9.4. CON PCB BOTTOM VIEW ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 54 9.5. POWER PCB TOP VIEW ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 55 9.6. POWER PCB BOTTOM VIEW ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

  • Page 56: Exploded Diagram And Spare Parts List

    10. Exploded Diagram and Exploded Parts List ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 57 ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...
  • Page 58 EXPLODED PARTS LIST (VX2035wm-1) ViewSonic Model Number: VS11435 Rev: 1a Serial No. Prefix: QCN Item ViewSonic P/N Ref. P/N Description Q'ty 2024275201P FRONT BEZEL VX2035/ABS 94HB BLACK C 2053756401P LED INDIC.-PWR VX2035/PMMA 94HB 2044270801P FUNCTION KEY VX2035/ABS 94HB BLACK C...
  • Page 59 PACKING PART LIST (VX2035wm-1 ) ViewSonic Model Number: VS11435 Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty VX2035WM1 monitor M-MS-0808-1317 2013053000P POLYETHY BAG P-00008220 2012194900P VX2035/EPS (R) P-00008221 2012195000P VX2035/EPS (L) BASE ASS'Y P-00008078 2013228805P POLYETHY BAG DC-00008178 2438501254P OWNER GUIDE...

  • Page 60: Recommended Spare Parts List

    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 61 Serial No. Prefix: QCN Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty DC-00008179 2002310606P GUARANT CARD VIEWSONIC VX2035WM-1 QSG 6P81 P-00008219 2011121502P CARTON BOX VIEWSONIC VX2035WM-1 VS11435 6P01 P-00008220 2012194900P POLYFOAM VX2035/EPS (R) 6P20 P-00008221 2012195000P POLYFOAM VX2035/EPS (L)
  • Page 62 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-R-0405-3235 2233410295P RES,CBN 1/4 S RD 1/4WS1Kohm J T52 R956 E-R-0405-3214 2233410395P RES,CBN 1/4 S RD 1/4WS10Kohm J T52 R807 E-R-0405-3221 2233410495P RES,CBN 1/4 S RD 1/4WS100Kohm J T52 R948...
  • Page 63 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-R-0405-6603 2253222096P RES CHIP 1/10W RC 0603 1/10W22 ohm J T R151 E-R-0405-6603 2253222096P RES CHIP 1/10W RC 0603 1/10W22 ohm J T R152 E-R-0405-6603 2253222096P RES CHIP 1/10W RC 0603 1/10W22 ohm J T...
  • Page 64 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2253456496P RES CHIP 1/4W RC 1206 1/4 W560Kohm J T R802 2253456496P RES CHIP 1/4W RC 1206 1/4 W560Kohm J T R803 2259210308P RES,CHIP NETWORKS 8P4R 1/16W10Kohm J P=0.8 RP01 2259210308P RES,CHIP NETWORKS 8P4R 1/16W10Kohm J P=0.8...
  • Page 65 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-C-0404-3815 2346410496P CAP,CHIP 85'C CS 0603/Y5V/50V0.1u Z T C130 E-C-0404-3815 2346410496P CAP,CHIP 85'C CS 0603/Y5V/50V0.1u Z T C131 E-C-0404-3815 2346410496P CAP,CHIP 85'C CS 0603/Y5V/50V0.1u Z T C132 E-C-0404-3815 2346410496P CAP,CHIP 85'C CS 0603/Y5V/50V0.1u Z T...
  • Page 66 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-Q-0402-1607 2360100796P XISTOR,PNP R SMD MMBT3906-F SOT-23 DIODES Q106 E-Q-0402-1607 2360100796P XISTOR,PNP R SMD MMBT3906-F SOT-23 DIODES Q107 E-Q-0402-1607 2360100796P XISTOR,PNP R SMD MMBT3906-F SOT-23 DIODES Q108 2360100896P XISTOR,PNP R SMD MMBT3906LT1G SOT-23ON...
  • Page 67 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-00003534 2363600696P DIODE,SWITCH RLS4148-T11 SOD80CROHM D106 E-00003534 2363600696P DIODE,SWITCH RLS4148-T11 SOD80CROHM D107 E-00003534 2363600696P DIODE,SWITCH RLS4148-T11 SOD80CROHM D108 E-00003534 2363600696P DIODE,SWITCH RLS4148-T11 SOD80CROHM D124 E-00003534 2363600696P DIODE,SWITCH RLS4148-T11 SOD80CROHM D125...
  • Page 68 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-00003830 2364601396P DIODE,SWITCH SMD 1N4148W-7-F SOD-123DIODES D124 E-00003830 2364601396P DIODE,SWITCH SMD 1N4148W-7-F SOD-123DIODES D125 E-00003830 2364601396P DIODE,SWITCH SMD 1N4148W-7-F SOD-123DIODES D126 E-00003830 2364601396P DIODE,SWITCH SMD 1N4148W-7-F SOD-123DIODES D127 E-00003830 2364601396P DIODE,SWITCH SMD 1N4148W-7-F SOD-123DIODES...
  • Page 69 J812 2433304020P SHIELDING FOAM W10*H10.5*L20mm K902 2434325603P SHIELDING TAPE W25*L60mm (AL) K901 DC-00008178 2438501254P CD-OWNER GUIDE VX2035WM-1 WIZARD VS11435 AUO 6P80 DC-00008109 2002310402P GUARANT CARD VIEWSONIC WARRANTY CARD-C 2004 6P07 M-LB-0813-0862 2056606025P SERIAL LABEL VS CN WARRANTY CARD SN STICKER...
  • Page 70 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) ViewSonic Corporation VX2035wm-1 Confidential - Do Not Copy...

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