ViewSonic VX2235wm-3 Service Manual
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ViewSonic VX2235wm-3 Service Manual

22” color tft lcd display
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Service Manual

ViewSonic VX2235wm-3
Model No. VS11446
22" Color TFT LCD Display
(VX2235wm-3_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 VX2235wm-3

  • Page 1: Service Manual

    Service Manual ViewSonic VX2235wm-3 Model No. VS11446 22” Color TFT LCD Display (VX2235wm-3_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 VX2235wm-3 Confidential - Do Not Copy...

  • Page 4: Precautions And Safety Notices

    The LCD module should be supplied by power complied with requirements of Limited 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 ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 5: Viewsonic Corporation

    Place the monitor on a clean and soft foam Placing the monitor on foreign objects. That could pad. scratch the surface of the panel or cause “Mura” The panel is placed facedown on the lap. That may cause “Mura” ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 6: Specification

    2. Specification FEATURES VX2235wm-3 Size 22 " wide Luminance (Typ) 300 cd/㎡ TFTLCD PANEL Contrast Ratio (Typ) 900:1 Colors 16.7 M (8bits RGB) Response Time 5 ms(on/off) M220EW01 V0 Viewing Angle (H/V) 170 ° / 160 ° Recommend resolution 1680x1050@60Hz Analog Yes (75ohms, 0.7/1.0 Vp-p)
  • Page 7 Saving Mode < 2 W@230VAC 50HZ Off Mode < 1 W @230VAC 50Hz (DC Power Off; Meet to Energy Star Ver4.0 Tier2) Recovery Time On Mode = N/A, Active Off < 3 sec ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 8 　 　 　 　 1280 x 768 60 Hz, 47.8 KHz 　 　 　 　 1280 x 768 75 Hz, 60.3 KHz 　 　 For Analog sync, Switch 1024x768@75Hz and 　 　 ViewSonic Corporation VX2235wm-3 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 Typical: 160º Minimum: 150º Response Time Typical = 5ms (Tr =3.6 ms,Tf =1.4 ms) 10%-90% @ Ta=25°C Maxmum = 8ms (Tr =5.7 ms,Tf =2.3 ms) Panel Defects Please see Panel Quality Specifications. ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 11: Front Panel Function Control Description

    Displays the Main Also a shortcut to display Menu or exits the the Contrast adjustment control screen and control screen ( ) / saves adjustments. OptiColor ( ) ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 12 • 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 VX2235wm-3 Confidential - Do Not Copy...

  • Page 13: 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 14 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 instructions on changing the resolution and refresh rate (vertical frequency).
  • Page 15 Scenery optimized for displaying outdoor scenery images. Vivid optimized for color luster and sharpness. These 7 presets are carefully chosen by Viewsonic, but may not suit all users' tastes. In that case, the user can either return to the Standard setting and manually adjust the brightness and contrast as desired.
  • Page 16 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 VX2235wm-3 Confidential - Do Not Copy...

  • Page 17: 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 18 The following diagram presents the data flow among the gamma correction, dithering, overlay MUX, OSD LUT and output format conversion blocks. Auto-Adjustment There are two main independent auto-adjustment functions supported by RTD, including auto-position & auto-tracking. The operation procedure is as following; ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 19 Vt + to determine the Vt - (0.6V, 0.8V, 1.0V, 1.2V). We also can finely tune the voltage by minus 0.1V. For application, we can select different threshold voltage by the polarity of the HSYNC. The control register is CR97 ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 20 A chip-level shutdown control limits total supply current to 1 µA, making the device ideal for bat- Tery powered applications. Protection circuitry in-creases device reliability: thermal and short circuit. Under voltage shutdown saves battery power for more essential devices when battery voltage drops to low leve. ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 21: Adjustment 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 22 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 Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2) ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 23 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 24 Test Signal: 1680*1050@60Hz Test Pattern: Horizontal & Vertical Line Thickness Pattern - Check and see if the image boundary is within the screen frame. - If not, readjust by the following steps: ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 25 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 26 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 27 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 28 2.Barcode Reader connect with keyboard and PC keyboard port. 3.Connect RS-232 Cable and VX2235WM3 with VGA Cable. 4.(when key in DVI DDC information, use VGA transform to DVI port ) 5.Connect Power Cord to VX2235WM3 Monitor. ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 29 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(VX2235WM3A.DAT press“ENTER” key) VX2235WM3_A means the DDC under analog mode. VX2235WM3D means the DDC under digital mode. ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 30 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 VX2235wm-3 Confidential - Do Not Copy...

  • Page 31: Packing Procedure

    At last, close the carton and seal it with tape. (Figure 5) DVI Cable 1.Power Cord 2.EAR Cable VGA Cable 1.User’s Guide 2.Guarant Card Figure 5 Figure 4 ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 32 Disassembly Procedure Disassembly of Stand and Dust Cover from LCD TV. 1.1 Unscrew 4 screws that secure Stand Unit and detach Dust Cover from the LCD TV. Stand Dust Cover ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 33 2. Disassembly of Rear Cover. 2.1 Unscrew 8 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 7 screws to remove Shield Plate. Shield Plate ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 34 3.2. Unscrew 6 screws and disconnect the wires to remove Power Board. Power Board 3.3. Unscrew 2 screws and disconnect the wires to remove Main Board. Main Board ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 35 3.4. Unscrew 8 screws to remove Speaker and bracket fix. Bracket,Fix Speaker 3.5. Unscrew 8 screws to remove Front Cover. ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 36 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 VX2235wm-3 Confidential - Do Not Copy...

  • Page 37: Trouble Shooting Flow Chart

    6. Troubleshooting Flow Chart ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 38 6.1. NO POWER 6.2. MCU NO FUNCTION ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 39 6.3. NO DISPLAY ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 40: Block Diagrams

    7. Block Diagram ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 41: Schematic Diagrams

    3.3DVCC 3,4,5 VDA_1V8 DGND 2,3,4,5 I101 *ATC1084_3Y3_252 I102 AP1117CY_1.8 3.3V DGND VOUT VOUT VDA_1V8 2,3 VOUT C125 C107 C108 C106 100nF 10uF/16V 100nF 100nF DGND DGND DGND DGND M32-D80 M32-D80 DGND DGND ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 42 RXCP 0619-for HDCP RXC- R131 RXC- RXCN 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 43 BG2N / TXE3- RXE3+ 100uF/16V 100nF ADC_VDD 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 VX2235wm-3 Confidential - Do Not Copy...
  • Page 44 R178 POWER R179 C153 C146 C147 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 X1,X2 雙向 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-3...
  • Page 45 C626 10n 0603 SIDE 0.1u 0805 1UF 0805 1UF 0805 R613 DGND correct pin define DGND DGND R614 Q602 MUTE_S MUTE_S modify value 0627 R615 MMBT3904 SOLDER SIDE DGND 1,2,3,4 DGND DGND ViewSonic Corporation Confidential - Do Not Copy VX2235wm-3...
  • Page 46 8.6. PLACEMENT 改 9PIN 100mm DC power IN LVDS output connector KEY connector 90mm RTD 2553V Speaker Earphone D-SUB ViewSonic Corporation VX2235wm-3 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 Confidential - Do Not Copy VX2235wm-3...
  • Page 48 Q912 D909 1N4148 0.01uF 1N4148 C919 R927 D912 P2804HVG AP4953M/SO8 4700pF/50V D910 3.01K/1% C927 1N4148 1N4148 C921 D918 C923 2200P C926 220U/25V 1N4148 2200P 470U/35V C922 220U/25V C924 R937 R936 68nF 392R/1% ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 49 0.22uF R825 R802 R842 C826 1.21K 1% 10 3A 0.1U F801 T2.5A/250V I802 TLP621 I803 R851 C827 TL431D 1.21K 1% P802 C803 2200pF 10UF/50V C802 2200pF Brightness ON_OFF P801 AC IN 100~240V ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...

  • Page 50: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1. MAIN PCB TOP VIEW ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 51 9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 52 9.3. CON PCB TOP VIEW 9.4. CON PCB BOTTOM VIEW ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 53 9.5. POWER PCB TOP VIEW ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 54 9.6. POWER PCB BOTTOM VIEW ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 55 10. Exploded Diagram and Exploded Parts List ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 56 ViewSonic Corporation VX2235wm-3 Confidential - Do Not Copy...
  • Page 57 EXPLODED PARTS LIST (VX2235wm-3) ViewSonic Model Number: VS11446 Rev: 1a Serial No. Prefix: QCZ Item ViewSonic P/N Ref. P/N Description Q'ty 2024275301P FRONT BEZEL VX2235/ABS 94HB BLACK C 2053756401P LED INDIC.-PWR VX2035/PMMA 94HB 2044270901P FUNCTION KEY VX2235 ABS 94HB BLACK C...
  • Page 58 PACKING PART LIST (VX2235wm-3 ) ViewSonic Model Number: VS11446 Rev: 1a Item ViewSonic P/N Ref. P/N Location Q'ty VX2235WM3 monitor M-MS-0808-1317 2013053000P POLYETHY BAG P-00008192 2012195500P VX2235 EPS (BOTTOM) P-00008193 2012195600P VX2235 EPS (TOP) BASE ASS'Y P-00008078 2013228805P POLYETHY BAG...

  • Page 59: 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 60 Rev: 1a Serial No. Prefix: QCZ Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty DC-00008154 2002310604P GUARANT CARD VIEWSONIC VX2235WM-3 QSG 6P81 P-00008191 2011122301P CARTON BOX VIEWSONIC VX2235WM-3 VS11446 6P01 P-00008192 2012195500P POLYFOAM VX2235 EPS (BOTTOM) 6P20 P-00008193...
  • Page 61 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-R-0405-1757 2233410195P RES,CBN 1/4 S RD 1/4WS 100 ohm J T52 R854 E-R-0405-3235 2233410295P RES,CBN 1/4 S RD 1/4WS 1Kohm J T52 R827 E-R-0405-3235 2233410295P RES,CBN 1/4 S RD 1/4WS 1Kohm J T52...
  • Page 62 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2253210396P RES CHIP 1/10W RC 0603 1/10W 10Kohm J T R614 2253210396P RES CHIP 1/10W RC 0603 1/10W 10Kohm J T R615 2253210496P RES CHIP 1/10W RC 0603 1/10W 100Kohm J T...
  • Page 63 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty E-C-0404-1856 2287210312P CAP CER Y2 0.01uF/250V P=10.0 M C C831 2287222212P CAP CER Y2 2200p/250V Y5V P=7.5 M K C802 2287222212P CAP CER Y2 2200p/250V Y5V P=7.5 M K C803 2300910401P CAP MTL MINI X2 0.1u/275V P=10.0 K C...
  • Page 64 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/50V 0.1u Z T C602 2346710596P CAP,CHIP 85'C CS 0603/Y5V/16V 1.0u Z T C603 2346710596P CAP,CHIP 85'C CS 0603/Y5V/16V 1.0u Z T C610 2346710596P CAP,CHIP 85'C CS 0603/Y5V/16V 1.0u Z T...
  • Page 65 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2362402200P PHOTO COUPLR K1010-3B (H4) COSMO I802 E-00005306 2362402300P PHOTO COUPLR TLP421 DIP4 TOSHIBA I802 E-D-0403-1465 2363220395P DIODE,RECT UF4004G DO-41 PEC D807 2363231995P DIODE,RECT UF4007 DO-41 1000V/1A PEC D806 2363234995P...
  • Page 66 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2364500396P DIODE,ZENER SMD RLZ5.6B 5.45-5.73V LL-34 ROHM D101 2364500396P DIODE,ZENER SMD RLZ5.6B 5.45-5.73V LL-34 ROHM D102 2364500396P DIODE,ZENER SMD RLZ5.6B 5.45-5.73V LL-34 ROHM D109 2364500396P DIODE,ZENER SMD RLZ5.6B 5.45-5.73V LL-34 ROHM...
  • Page 67 SHIELDING TAPE W25*L60mm (AL) K902 659 N/A 2434325603P SHIELDING TAPE W25*L60mm (AL) K903 660 DC-00008155 2438501252P CD-OWNER GUIDE VX2235WM-3 WIZARD VS11446 AUO 6P80 661 DC-00008109 2002310402P GUARANT CARD VIEWSONIC WARRANTY CARD-C 2004 6P07 662 N/A 2056606025P SERIAL LABEL VS CN WARRANTY CARD SN STICKER...
  • Page 68 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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