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ViewSonic VS11446 Service Manual

22” color tft lcd display
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Service Manual

ViewSonic VX2235wm-4
Model No. VS11446
22" Color TFT LCD Display
(VX2235wm-4_SM Rev. 1a Dec. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

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  • Page 1: Service Manual

    Service Manual ViewSonic VX2235wm-4 Model No. VS11446 22” Color TFT LCD Display (VX2235wm-4_SM Rev. 1a Dec. 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 Block Diagram Schematic Diagrams PCB Layout Diagrams 10. Exploded Diagram and Exploded Parts List 11. Recommended Spare Parts List ViewSonic Corporation VX2235wm-4 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 VX2235wm-4 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-4 Confidential - Do Not Copy...

  • Page 6: Specification

    Volume* , Mute* Color Adjust SRGB, 9300K,7500K, 6500K(default), 5400k,User Color [R, G, 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 7 Light Source MTBF: 40K hrs (Min) 18. POWER SAVING "On" Green Normal FUNCTION "Sleep" Amber <2W "Off" <1W 19. LOGISTICS Container 20’/40’ 480/1008pcs (Palletized) Load 48 pcs Pallet Load 7 66907 25142 5 ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 8 Power Cable 15 Pin VGA Video Cable Audio Cable Quick Start Guide ViewSonic Wizard CD-ROM w/ 17 Language User Guide 23. EU Packaging 1. Weight of the individual (empty) shipping carton. ---------- Weight =1.3 Kg/box Information 2. Weight and materials of the poly foam ------ Weight = 217 g/piece, 2 pieces per box, Material = EPS 3.
  • Page 9 　 　 1024 x 768 50 Hz, 39.6 KHz For SOG sync, the Information OSD will be 1024x768@50Hz, 　 　 　 　 the OSD content also can be changed to 1280x768@50Hz by ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 10 *2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message without blanking. *3. The image quality of 85Hz mode might be worse than 75Hz. ViewSonic Corporation VX2235wm-4 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-4 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-4 Confidential - Do Not Copy...

  • Page 13: Main Menu Controls

    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. ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 14 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 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-4 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-4 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-4 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-4 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-4 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-4 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-4 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-4 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-4 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-4 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-4 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-4 Confidential - Do Not Copy...
  • Page 28 2.Barcode Reader connect with keyboard and PC keyboard port. 3.Connect RS-232 Cable and VX2235WM4 with VGA Cable. 4.(when key in DVI DDC information, use VGA transform to DVI port ) 5.Connect Power Cord to VX2235WM4 Monitor. ViewSonic Corporation VX2235wm-4 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(VX2235WM4A.DAT press“ENTER” key) VX2235WM4_A means the DDC under analog mode. VX2235WM4D means the DDC under digital mode. ViewSonic Corporation VX2235wm-4 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-4 Confidential - Do Not Copy...

  • Page 31: Packing Procedure

    1.4 Place the LCD TV into the carton and then Put the other cushions on the LCD TV,put all the accessories into the carton. At last, close the carton and seal it with tape. (Figure 5) VGA Cable 1.Power Cord 2.EAR Cable 1.User’s Guide 2.Guarant Card Figure 5 Figure 4 ViewSonic Corporation VX2235wm-4 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-4 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-4 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-4 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-4 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 Board Panel Unit ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...

  • Page 37: Troubleshooting Flow Chart

    6. Troubleshooting Flow Chart ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 38 6.1. NO POWER 6.2. MCU NO FUNCTION ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 39 6.3. NO DISPLAY ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...

  • Page 40: Block Diagram

    7. Block Diagram ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...

  • Page 41: 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 ViewSonic Corporation DGND DGND Model DC TO DC Title Date Rev: ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 42 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 VX2235wm-4 Confidential - Do Not Copy...
  • Page 43 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 VX2235wm-4 Confidential - Do Not Copy...
  • Page 44 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 Model Title Date Rev: ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 45 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 Model AUDIO AMPLIFIER Title Date Rev: ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • 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 Model PLACEMENT Title Date Rev: ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 47 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 VX2235wm-4 Confidential - Do Not Copy...
  • Page 48 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 Model INVERTER Title Date Rev: ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 49 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 Model Title POWER Date Rev: ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...

  • Page 50: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1. MAIN PCB TOP VIEW ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 51 9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 52 9.3. CON PCB TOP VIEW 9.4. CON PCB BOTTOM VIEW ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 53 9.5. POWER PCB TOP VIEW ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 54 9.6. POWER PCB BOTTOM VIEW ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...

  • Page 55: Exploded Diagram And Exploded Parts List

    10. Exploded Diagram and Exploded Parts List ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 56 ViewSonic Corporation VX2235wm-4 Confidential - Do Not Copy...
  • Page 57 EXPLODED PARTS LIST ( VX2235wm-4 ) ViewSonic Model Number: VS11446 Rev: 1a Serial No. Prefix: QJQ 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-4 ) ViewSonic Model Number: VS11446 Rev: 1a Item ViewSonic P/N Ref. P/N Location Q't y VX2235WM4 monitor M-MS-0808-1317 2013053000P POLYETHY BAG P-00008192 2012195500P VX2235 EPS (BOTTOM) P-00008193 2012195600P VX2235 EPS (TOP) BASE ASS'Y N /A...

  • Page 59: 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 60 BOM LIST (VX2235wm-4) ViewSonic Model Number: VS11446 Rev: 1a Serial No. Prefix: QJQ 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 C101 E-C-0404-3815 2346410496P CAP,CHIP 85'C CS 0603/Y5V/50V 0.1u Z T...
  • Page 61 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2364600496P DIODE,SWITCH SMD MM4148 SOD80C GRANDE D104 E-00003534 2363600696P DIODE,SWITCH RLS4148-T11 SOD80C ROHM D104 E-D-0403-1892 2364200896P DIODE,RECT(SMD) BAS32L SOD80C PHILIPS D104 E-00003830 2364601396P DIODE,SWITCH SMD 1N4148W-7-F SOD-123 DIODES D104 2364600496P DIODE,SWITCH SMD MM4148 SOD80C GRANDE...
  • Page 62 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 Q108 E-Q-0402-1607 2360100596P XISTOR,PNP R SMD MMBT3906-NL SOT23 FAIRCHILD Q108 E-Q-0402-1180 2360301296P XISTOR,NPN R SMD MMBT3904-F SOT23 DIODES Q602 E-Q-0402-1608 2360300896P XISTOR,NPN R SMD MMBT3904K SOT-23 FAIRCHILD...
  • Page 63 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2253210496P RES CHIP 1/10W RC 0603 1/10W 100Kohm J T R608 E-00003527 2253247396P RES CHIP 1/10W RC 0603 1/10W 47Kohm J T R609 2253210496P RES CHIP 1/10W RC 0603 1/10W 100Kohm J T...
  • Page 64 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2362402200P PHOTO COUPLR K1010-3B (H4) COSMO I802 2365328191P LINEAR IC AP431VLA TO-92 ATC I803 E-IC-0401-1270 2365319391P LINEAR IC TL431CLPRE3 TO-92 TI I803 E-IC-0401-2152 2365321991P LINEAR IC KA431AZTA TO-92 FAIRCHILD I803...
  • Page 65 Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty 2428106150P JUMPER 0.6∮*15.0mm J804 2428106150P JUMPER 0.6∮*15.0mm J805 2428106100P JUMPER 0.6∮*10.0mm J901 2428106100P JUMPER 0.6∮*10.0mm J902 2428106125P JUMPER ∮0.6*12.5mm J903 2428106075P JUMPER 0.6∮*7.5mm J904 2428106075P JUMPER 0.6∮*7.5mm J905 2428106075P JUMPER 0.6∮*7.5mm J906 2428106075P JUMPER 0.6∮*7.5mm...
  • Page 66 1F01 2053756401P LED INDIC.-PWR VX2035/PMMA 94HB 1F02 2044270901P FUNCTION KEY VX2235 ABS 94HB BLACK C 1F03 M-MS-0808-9214 2051352100P NAME PLATE VIEWSONIC E015-006 3-BIRD LOGO 1F04 2051352800P NAME PLATE 38.00MM*5.90MM 1F05 M-SCW-0824-0285 2084730082P SCREW,BND T+ M3X8(BND T+) 1F06 M-SCW-0824-0285 2084730082P SCREW,BND T+ M3X8(BND T+)
  • Page 67 2427721841P CABLE EAR 3.5(577C) 2547#28 1.8M BLK P962 CB-00006182 2427501198P I/O CABLE DVI-D*2 20276(6.0) 1.83M BLACK P971 2438501257P CD-OWNER GUIDE VX2235WM-4(P) WIZARD VS11446 A 6P80 2002310633P GUARANT CARD VIEWSONIC VX2235WM-4 QSG 6P81 2013228806P POLYETHY BAG 150X250X0.03T mm LDPE VSC LCD...
  • 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 VX2235wm-4 Confidential - Do Not Copy...

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