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Copyright

Copyright© 2009 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.

Disclaimer

ViewSonic makes no representations or warranties, either expressed or implied, with respect to the contents
hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. 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.

Trademarks

Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.

Revision History

Revision SM Editing Date ECR Number

Description of Changes

Editor

1a

04/21/09

Initial Release Sophia Kao

ViewSonic Corporation

Confidential - Do Not Copy

VTMS2431

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Summary of Contents for VS12335-2M

Page 1: ...Service Manual ViewSonic VTMS2431 Model No VS12335 2M 23 6 LCD TV VTMS2431_SM Rev 1a Apr 2009 ViewSonic 381 Brea Canyon Road Walnut California 91789 USA 800 888 8583 ...

Page 2: ...and specifically disclaims any warranty of merchantability or fitness for any particular purpose 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 Trademarks Optiquest is a registered trademark of ViewSonic Corporation ViewSonic is a registered...

Page 3: ...ircuit Description 30 5 Adjustment Procedure 37 6 Trouble Shooting Flow Chart 64 7 Block Diagram 67 8 Schematic Diagrams 68 9 PCB Layout Diagrams 87 10 Exploded View And Exploded Parts List 94 11 Recommend Spare Parts List 97 2 Specification 3 ViewSonic Corporation Confidential Do Not Copy VTMS2431 ii ...

Page 4: ...immediately Long contact with water may cause discoloration or spots 4 When the panel surface is soiled wipe it with absorbent cotton or other soft cloth 5 Since the panel is made of glass it may break or crack if dropped or bumped on hard surface 6 Since CMOS LSI is used in this module take care of static electricity and insure human earth when handling 7 Do not open nor modify the Module Assembl...

Page 5: ...rizer Surface of the LCD panel is pressed by fingers and that may cause Mura Take out the monitor with cushions Taking out the monitor by grasping the LCD panel That may cause Mura 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 ViewSonic Corporation Confidential Do Not Copy VTMS2431 2 ...

Page 6: ...d video cards see 7 1 General Test Equipment in the primary mode VGA 60 Hz and after user adjustment b No image drift or lose fine tune settings due to panel temperature change Panel Acceptance Spec Refer to the panel acceptance criteria specification Note Intermittent and or Display Pattern defects which result in further bright or dark dots will be counted individually against the above specific...

Page 7: ...5 75 Hz 16 7 M DDC2B Compliant Rev 1 3 Refer to Appendix USB Characteristics USB 2 0 3 Audio Audio amp of this product shall be provided by YAMAHA with a Model Number of YDA148 MST MSD2248AL for VTMS2431 M shall be used as sound processor In addition a pair of speakers shall be integrated within this product The audio signals of this product shall comply with the specification listed in the follow...

Page 8: ...issing 11 Power Supply Acoustics The Power Supply shall not produce audible noise that would be detectable by the user Excluding Power Supply Fan Audible shall be defined in accordance with ISO 7779 DIN EN27779 1991 Power Switch noise shall be Excluded 12 Efficiency 80 full load nominal line 13 Leakage Current 0 5mA 240VAC 14 Power Saving DPMS N A 15 Recovery Time 3 sec 16 Power Factor Correction ...

Page 9: ...style Front size Front edge style Front edge color FG color BG color F G Opacity Option ATSC GG Opacity DCR On Off Restore Default Yes No OPTION TV ID 01 99 TV Source Air CATV CHANNEL Auto Scan Scan all channels Digital channel only Analog channel only OSD Table for VS12335 2M USB MOVIE File list Previous Play Pause Next Stop Timer PHOTO Photo file list preview Previous Play Pause Next Rotate Stop...

Page 10: ...ents N A Exterior Chassis Color Refer to Product ID Guide Chassis Component s Color Difference Refer to Product ID Guide Chassis Color Drift Due to UV Light The color drift due to UL Light shall be less than 10 Delta E in the 1976 CIE L a b color space Testing shall be performed according to the requirements of ASTM Test Method D4459 93 Chassis Texture Front Bezel N A Back Cover N A MT11010 Molded...

Page 11: ...roduct Operating Temperature 0 C to 40 C Humidity 10 65 non condensing Altitude 0 meter to 2000 meters above sea level Storage Temperature 20 C to 60 C Humidity 0 90 non condensing Altitude 0 meter to 12 000 meters above sea level ViewSonic Corporation Confidential Do Not Copy VTMS2431 8 ...

Page 12: ...mode 3 Remote Control Receiver Receives IR signals from the remote control 4 Volume Down Decrease sound volume or adjust a highlighted control while in OSD menu 5 Volume Up Increase sound volume or adjust a highlighted control while in OSD menu 6 MENU Turn OSD menu ON OFF 7 CH Down Channel down when source is TV or select a control while in OSD menu 8 CH Up Channel up when source is TV or select a...

Page 13: ...Video input Connect this jack to the composite video output connectors on your A V equipment 6 S Video input Connect the S Video cable from the compatible device to this connector on the rear panel of the LCD TV 7 AV S Video Audio input left right Connect the Audio in cable for AV S Video from this jack to the corresponding connectors on your A V device 8 YPbPr DVI Audio input left right Connect t...

Page 14: ... to your Cable or VHF UHF antenna 12 RS232 signal input This port is for the service technician s use For the function description of RS232 please download the complete user guide from www viewsonic com and refer to RS232 Protocol on page 45 to 55 The RS232 application software is not supplied with TV 13 USB Connect to your USB devices such as USB flash drive portable hard drive ViewSonic Corporat...

Page 15: ... system DVD Player VCD Player Game system DVD Player Personal Computer AC power socket DVD Player VCD Player Game system USB Device Please refer to the Quick Start Guide supplied when connecting the other equipment to your LCD TV For detailed information please download the complete user guide from www viewsonic com and refer to page 16 to 20 ViewSonic Corporation Confidential Do Not Copy VTMS2431...

Page 16: ... the same as these buttons on the remote control Button Description 1 INPUT Input source select 2 ENTER Confirm selection or enter selected menu 3 TV Direct to TV source 4 VOL Adjust volume UP DOWN 5 GUIDE Show electronic program guide EPG 6 LIST Select channel from program list 7 0 9 number buttons Directly channel select ViewSonic Corporation Confidential Do Not Copy VTMS2431 13 ...

Page 17: ... DOWN 17 ZOOM Adjust window size 18 FAV Select from preset Favorite Channels 19 MUTE Volume mute ON OFF 20 INFO Display current information 21 SLEEP Set timer to turn off TV 22 MTS Select Mono Stereo or SAP sound 23 C C Select caption mode 24 16 9 4 3 Switch between 16 9 and 4 3 aspect ratio screen 25 ROTATE Rotate the photos in 90 180 270 and 0 26 EXIT Exit the current screen 27 STOP Return to ph...

Page 18: ...U at any time 5 The Auto Scan screen will be shown and after it is done the screen will return to the first found channel Viewing the Menus 1 Press the MENU button to display the OSD main menu There are six top menus on the screen PICTURE AUDIO TIME OPTION LOCK and CHANNEL 2 Press or to select your desired top menu 3 Press ENTER or to enter the menu you select 4 Use to select the control you want ...

Page 19: ... the MENU button to display the OSD main menu 2 Press or to select the CHANNEL menu Press or to select Favorite then press button to enter Favorite setting 3 Press or to select the channel you d like to be your favorite channel Press ENTER to confirm your selection 4 To cancel the selection Press ENTER again on the selected channel 5 Press MENU to exit To view your favorite channels press FAV butt...

Page 20: ... press MENU or ENTER to complete the setting 7 Press MENU to exit Adding Erasing Channel When the channel is erased it will not appear on the screen when you browse the channels with CH button To see the channel again you must add the channel or perform the Auto Scan page 9 function again 1 Press the MENU button to display the OSD main menu 2 Press or to select the CHANNEL menu Press or to select ...

Page 21: ...V mode Surround Sound Audio Only Sleep Timer Time Zone DST Time Format Auto Sync Clock Menu Language Transparency OSD Time Out DCR Dynamic Contrast Ratio and TV ID then press or to select your desired option 4 Press MENU to exit When in YPbPr source the option selected in Picture Mode of PICTURE Menu Standard Dynamic Soft or Personal will be applied in USB source 3 1 Press the MENU button to displ...

Page 22: ...3 Press or to select Sleep Timer and press or to set the Sleep Timer from 5 240 min or Off 4 Press or to select Time Zone and select the correct time zone of your area with or The displayed time of Clock will be changed at the same time automatically To adjust Clock select Clock and press Use or to change between year month date hour minute or to adjust When you finish adjustment select OK and pre...

Page 23: ... On to enable the detailed settings 6 Move to US or Canada rating system For detailed Close Caption setting 1 Press or to select Option then press to enter Option setting 2 Press or to select the Mode to be Custom and then use or to select desired options and use or to adjust detailed settings When you select the Mode to be Default you can not adjust the detailed settings ViewSonic Corporation Con...

Page 24: ...ypes content FV fantasy violence V violence S sexual situations L adult language D sexsual dialog 2 Press ENTER to set or reset each area 3 Press MENU to exit 2 MPAA 1 Press or to select MPAA 2 Press or to select your desired MPAA ratings level The MPAA ratings level are defined as following G general audience PG parental guidance suggested PG 13 recommended for children 14 years of age or older R...

Page 25: ... guidance 14 viewers and older 18 adult programming EXEMPT exempt 4 Press MENU to exit 2 Canadian French 1 Press or to select Canada Fre 2 Press to enter 3 Press or to select your desired Canadian French rating level The Canadian French rating levels are defined as following G genenral 8ans children eight years and older 13ans not appropriate for children of less than 13 years 16ans not appropriat...

Page 26: ...shows an example of the content of RRT Setting However the selections and sub selections of RRT Setting may be different in your OSD menu according to the local broadcasting system To reset RRT setting move to Reset RRT and press to reset To Change Password 1 Press or to select Change Password then press to enter Change Password setting 2 Move to Enter Old Password then enter the old password with...

Page 27: ...ct Restore Default then press to restore the factory default setting 5 Select Yes and press ENTER to confirm the setting Setting RS232 Parameter 1 Press the MENU button to display the OSD main menu 2 Press or to select the OPTION menu 3 Press ENTER or to enter OPTION menu 4 Press or to select TV ID then press or to set the TV ID number from 01 99 For detailed information please download the comple...

Page 28: ... Auto Auto adjustment H Pos H Position V Pos V Position Clock or Phase and adjust the level with or When in PC source the other menus are the same as or similar to when in other source When there is no signal in the PC mode No Signal will be displayed on the screen and the TV will automatically turn into power saving mode after a few seconds idleness Press INPUT or POWER button on the remote contr...

Page 29: ...e the buttons on the TV panel to make selection The panel buttons function the same as the following keys on the remote control VOL VOL MENU MENU EXIT CH CH INPUT ENTER Press the CH and INPUT keys together at the same time will change the input source from USB mode to TV mode MOVIE mode Select the Movie icon to get to the Movie Preview screen All the movie files will be listed in the playlist at t...

Page 30: ... Pause Stop the movie from playing Press again to play I Next Play the next movie in the playlist Stop Back Stop the movie playing and go back to the Movie Preview screen PHOTO mode Photo thumbnails will be displayed in this folder Use arrow keys to select a photo The photo will not be displayed if it is not supported by this TV Instead the photo thumbnail will be replaced by the icon ViewSonic Co...

Page 31: ...nge to slideshow mode Press again to keep in pause mode I Next Display next photo Rotate Rotate the current photo 90 180 270 0 normal Stop Back Return to photo thumbnail screen Zoom Zoom in the current photo Rate is x2 x4 x8 x16 x1 normal E BOOK mode Select the txt file in the E BOOK you d like to read and press ENTER to display it To display next page of the txt file press ViewSonic Corporation C...

Page 32: ...Press ENTER to confirm the change In Setup menu you can select Language Slideshow duration Slideshow mode and Movie repeat mode If you select Autorun to On and turn off and on the power again then the TV will display the photo in slideshow mode automatically To stop and return to USB mode selection screen press MENU key at anytime To return to factory default settings select Default and press ENTE...

Page 33: ...ile video decoder a Dolby Digital AC 3 MPEG layer I and II digital audio decoder with analog audio outputs that are designed to support ATSC HD SDTV programs while handling ATSC CC and EPG With additional software support the MSD2248AL can be used in DVB T standard areas such as part of Asia Africa and Australia Furthermore it is also possible to decode MPEG 4 JPEG MP3 formats from external source...

Page 34: ... 1 51 SIF1M Analog Input Reference Ground for SIF Audio Input Channel 1 52 I2S_OUT_MCK Output Audio Master Clock Output 109 I2S_OUT_BCK Output Audio Bit Clock Output 110 I2S_OUT_WS Output Word Select Output 4mA driving strength 108 I2S_OUT_SD Output Audio Serial Data Output 4mA driving strength 111 I2S_OUT_MUTE Output Audio Output Mute Control 112 SPDIFO Output S PDIF Audio Output 4mA driving stre...

Page 35: ... Negative Data Output 157 LVB1P Output LVDS B Link Channel 1 Positive Data Output 156 LVB2M Output LVDS B Link Channel 2 Negative Data Output 155 LVB2P Output LVDS B Link Channel 2 Positive Data Output 154 LVBCKM Output LVDS B Link Negative Clock Output 153 LVBCKP Output LVDS B Link Positive Clock Output 152 LVB3M Output LVDS B Link Channel 3 Negative Data Output 151 LVB3P Output LVDS B Link Chann...

Page 36: ...eral Purpose Input Output 119 SAR0 Analog Input SAR Low Speed ADC Input 0 General Purpose Input Output 118 DRAM Interface Pin Name Pin Type Function Pin DQM 3 0 Output Data Mask for Low Byte active high 177 188 231 242 DQS 3 0 I O Data Strobe 168 192 221 246 MVREF Input Reference Voltage for DDR SDRAM Interface 197 MCLKZ Output DRAM Memory Negative Differential Clock 198 MCLK Output DRAM Memory Po...

Page 37: ...ck cycle at the I O pins A single read or write access for the 256 Mbit Double Data Rate SGRAM effectively consists of a single 2n bit wide one clock cycle data transfer at the internal DRAM core and two corresponding n bit wide one half clock cycle data transfers at the I O pins A bidirectional data strobe DQS is transmitted externally along with data for use in data capture at the receiver DQS i...

Page 38: ...QAM and 256 QAM modes for digital cable appliances It achieves extremely high performance employing direct IF sampling architecture robust synchronization and robust channel equalization It contains a 12 bit A D converter and a PWM generator for automatic gain control A host interface with an I2C bus is also included to control the behavior of the MSD809 I404 AML7228 The heart of USB port AML7228 ...

Page 39: ...he micro coded engine provides support for all existing audio formats and it also hasenough flexibility to accommodate new audio standards Popular audio formats like MPEG LPCM Dolby AC 3 5 1 HDCD MP 3 WMA AAC RealAudio and FLAC can be supported The AML7228 also integrated two USB 2 0 High Speed OTG controllers and PHYs for connecting to USB hard disk FLASH memory The AVOS drivers and applications ...

Page 40: ...ure and white balance adjustments C Video reference the front detail specifications 1 Eeprom Initial Press MENU and and POWER key go to factory mode 2 Adjust color temperature A Enter to the factory mode Source select D_Sub figure 2 Use 1920x1080 60Hz the pattern is 5 block figure 1 then move the cursor to the White Balance figure 3 Press key That will do auto white balance B After auto white bala...

Page 41: ...auto adjusting VGA MODE Depend on the TIMING of TIMING TABLE TABLE 4 to switch MODE in order stay about 10 seconds each MODE it can changed and stored automatically each MODE We can t switch over to the next MODE until AUTO ADJUST disappears 5 HDMI MODE FUNCTION TEST A DVI MODE Depend on the TIMING of TIMING TABLE TABLE 3 to check MODE in order B HDMI MODE make sure the 480i 480p 720p 1080i 1080p ...

Page 42: ...Under S VIDEO AV MODE input L R AUDIO signal checks whether the action of AUDIO IN is right D Under YPbPr MODE input L R AUDIO signal checks whether the action of AUDIO IN is right Under HDMI MODE checks whether the action of AUDIO IN is right Under TV MODE checks whether the action of AUDIO IN is right E In DTV mode the input signal ATSC confirmed AUDIO LANGUAGE and the normal movements PARENT 11...

Page 43: ...75 589 75 595 75 601 75 607 75 613 75 619 75 625 75 631 75 637 75 643 75 101 00 107 00 113 00 123 00 129 00 221 00 227 00 233 00 239 00 245 00 251 00 257 00 517 00 523 00 529 00 535 00 541 00 547 00 553 00 559 00 565 00 571 00 577 00 583 00 589 00 595 00 601 00 607 00 613 00 619 00 625 00 631 00 637 00 643 00 649 00 655 00 661 00 667 00 673 00 679 00 685 00 43 44 45 46 47 48 49 50 51 52 53 54 55 5...

Page 44: ...7 00 263 00 269 00 275 00 281 00 287 00 293 00 299 00 305 00 311 00 317 00 323 00 329 00 335 00 341 00 347 00 353 00 359 00 365 00 371 00 377 00 383 00 389 00 395 00 JJ KK LL MM NN OO PP QQ RR SS TT UU VV WW AAA BBB CCC DDD EEE 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 354 360 360 366 366 372 3...

Page 45: ... 57 423 98 111 17 141 58 429 99 117 18 147 59 435 100 651 19 153 60 441 101 657 20 159 61 447 102 663 21 165 62 453 103 669 22 171 63 459 104 675 23 219 64 465 105 681 24 225 65 471 106 687 25 231 66 477 107 693 26 237 67 483 108 699 27 243 68 489 109 705 28 249 69 495 110 711 29 255 70 501 111 717 30 261 71 507 112 723 31 267 72 513 113 729 32 273 73 519 114 735 33 279 74 525 115 741 34 285 75 53...

Page 46: ...f close caption Input signal level 45dBu G CHANNEL 69 Adjustment attenuator If the critical point of the change of the image signal to noise ratio is under LEVEL 60dBu regards as normally PRODUCTS OUTPUT CHECK ITEM The same as CENTRALISM TRANSMITTING SIGNAL CHECK CONTENT saturation TEST inputs the TV signal the input signal LEVEL establishment most greatly is 90dBu check whether CONTRAST of the im...

Page 47: ... dBu regards as normally TIMING TABLE FACTORY PRESET MODE table 4 No Resolution V freq D SUB DVI TO HDMI HDMI 1 1920x1080 60 YES NO NO 2 1680x1050 59 8 YES NO NO 60 YES NO NO 3 1440x900 59 8 YES NO NO 59 9 YES NO NO 4 1280x1024 60 YES NO NO 75 YES NO NO 5 1024x768 60 YES YES YES 75 YES NO NO 6 832x624 75 YES YES YES 7 800x600 60 YES YES YES 75 YES YES YES 8 640x480 60 YES YES YES 75 YES YES YES 9 ...

Page 48: ...Equipment Needed VTMS2431M LCD TV Fixture for Firmware Upgrade VGA Cable PC Personal Computer Firmware Upgrade Program One additional LCD TV for checking the program execution USB flash memory 5 4 2 Connection PC to the Tv set by the tool as the follow picture pc1 pc3 Action The D_SUB cable must be 15 pin and the TV set must be AC ON pc 1 pc 2 pc 3 ViewSonic Corporation Confidential Do Not Copy VT...

Page 49: ...f the the ISP board have been found you will see the picture as bellow pc 4 3 Press the Connect If all the things are ok and ready it will show the device type as the bellow picture Than pres 確定 pc 5 ViewSonic Corporation Confidential Do Not Copy VTMS2431 46 ...

Page 50: ... version firmware file a file name with img sub filename into the flash memory 2 Select the file from the File function of the USB menu and press enter 3 Follow the OSD operation instruction to the end 4 The USB function will be re load if the upgrade is successful While upgrading be sure to keep the TV power on and avoid any unnecessary remote operation also be sure to to keep TV away from other ...

Page 51: ... conform to the LCD TV you have to do the DDC key in 5 5 1 Equipment Needed VTMS2431M LCD TV DDC Card PC RS 232 cable Barcode Reader VGA Cable VTMS2431M LCD TV DDC Card PC RS 232 Cable VGA Cable Barcode Reader 5 5 2 Setup Procedure 1 Connect VGA Card and DDC Card with RS 232 cable ViewSonic Corporation Confidential Do Not Copy VTMS2431 48 ...

Page 52: ... LCD TV with VGA Cable when key in DVI DDC information use VGA transform to DVI port 4 Connect Power Cord to VT2430 1M LCD TV 5 Press MENU and ENTER at the same time then go into the BURN IN MODE 5 5 3 DDC Key In Procedure 1 run DDC exe ViewSonic Corporation Confidential Do Not Copy VTMS2431 49 ...

Page 53: ...2 Choose model number the 3 Press ENTER key ViewSonic Corporation Confidential Do Not Copy VTMS2431 50 ...

Page 54: ...4 Press F4 key and Input bar code ViewSonic Corporation Confidential Do Not Copy VTMS2431 51 ...

Page 55: ...5 Press ENTER key then the successful picture is as follows DDC DOWNLOED OK 6 Exit program ViewSonic Corporation Confidential Do Not Copy VTMS2431 52 ...

Page 56: ...DMI connector 5 6 1 Equipment Needed VTMS2431M LCD TV PC RS 232 cable Barcode Reader HDMI Cable VTMS2431M LCD TV PC RS 232 Cable HDMI Cable Barcode Reader 5 6 2 Setup Procedure 1 Connect HDMI Card and DDC Card with RS 232 cable 2 Barcode Reader connects with keyboard and PC keyboard port ViewSonic Corporation Confidential Do Not Copy VTMS2431 53 ...

Page 57: ...DC Card and VTMS2431M LCD TV with HDMI Cable 4 Connect Power Cord to VTMS2431M LCD TV 5 6 3 DDC Key In Procedure 1 Run DDC exe 2 Choose model number then ViewSonic Corporation Confidential Do Not Copy VTMS2431 54 ...

Page 58: ...3 Press ENTER key 4 Press F4 key ViewSonic Corporation Confidential Do Not Copy VTMS2431 55 ...

Page 59: ...5 Input bar code 6 Press ENTER key then the successful picture is as follows DDC DOWNLOED OK 7 Exit program ViewSonic Corporation Confidential Do Not Copy VTMS2431 56 ...

Page 60: ...PE bag and seal the bag Figure 2 1 3 Put the cushions on the LCD TV Figure 3 1 4 Place the LCD TV into the carton and put all the accessories into the carton At last close the carton and seal it with tape Figure 4 Figure 4 Figure 3 Figure 1 Figure 2 Remote contrl 1 User s Guide 2 Guarant Card 3 Battery Power Cord ViewSonic Corporation Confidential Do Not Copy VTMS2431 57 ...

Page 61: ...P POLYETHY BAG 1 6 NA 2001132017P CD OWNER GUIDE 1 7 DC 00009541 2002310807P GUARANT CARD 1 8 A 00005362 2427130046P AC POWER CORD 1 9 P 00009475 2011124004P CARTON BOX 1 10 NA 2055632340P LABEL 1 11 NA 2005100401P BATTERY DRY 2 12 A 00008456 2419200224P REMOTE CONTROL 1 ViewSonic Model Number VS12335 2M Rev 1a PACKING PART LIST VTMS2431 ViewSonic Corporation Confidential Do Not Copy VTMS2431 58 ...

Page 62: ...assembly of Stand from LCD TV 1 1 Unscrew 4 screws to move Stand Unit and Dust Cover 2 Disassembly of Rear Cover 2 1 Unscrew 10 screws in the Rear Cover Stand Dust Cover ViewSonic Corporation Confidential Do Not Copy VTMS2431 59 ...

Page 63: ...2 2 Prize the rectangle hole on Rear Cover Fig 1 with a screwdriver Fig 2 to make the Rear Cover detach from the LCD TV Rear Cover Fig 1 Fig 2 ViewSonic Corporation Confidential Do Not Copy VTMS2431 60 ...

Page 64: ...wer Board Front Cover and Panel Unit 3 1 Unscrew 8 screws to remove Bracket fix and Dust cover 3 2 Unscrew 5 screws to move KeyPad Board Bracket fix KeyPad Board Dust cover ViewSonic Corporation Confidential Do Not Copy VTMS2431 61 ...

Page 65: ...crew screws 5 to move Shield Plate 3 4 Unscrew 7 screws and disconnect the wires to remove Mms Board and Main Board Main Board Shield Plate Mms Board ViewSonic Corporation Confidential Do Not Copy VTMS2431 62 ...

Page 66: ...3 5 Unscrew 4 screws and disconnect the wires to remove Power Board 3 6 Unscrew screws 4 to move Panel Bracket Power Board Panel Bracket ViewSonic Corporation Confidential Do Not Copy VTMS2431 63 ...

Page 67: ...D807 I801 I801 DTV VDD33 CHECK I204 SUROUND CAP BEAD OK N Y CHECK I206 Y CHECK I202 SUROUND CAP OK D807 I801 I801 VCC1V2 STOK CHECK I105 SUROUND CAP BEAD OK N Y CHECK I206 SUROUND CAP OK Y Y CHECK P101 OK D807 I801 I801 PANEL 5V OK CHECK Q105 Q106 N Y CHECK I107 SUROUND OK Y OK ViewSonic Corporation Confidential Do Not Copy VTMS2431 64 ...

Page 68: ...OUCE S Video cable Check N Check N N R561 R565 L505 L506 C521 C527 I107 SUROUND Y Check Check YPbPr cable Check N Check N N R567 R570 R573 YPbPr SOUCE Check TV SOUCE Check RF CABLE Check N Check N N L502 I501TUNER I503 SUROUND P504 SUROU Check PANEL 5V Check Q105 Q106 Check N Check N N PANEL P106 P503 SUROU Y Check HDMI SOUCE Check HDMI Check N Check N N I502 P501SUROUN Y ViewSonic Corporation Con...

Page 69: ...pheral Check USB VCC3 3 ST N Check I410 I411 I206 peripheral N N Check USB Check Flash memory and peripheral Check N Check N N I404 I412 peripheral USB VCC1 2V ATAPI 3 3V Y ViewSonic Corporation Confidential Do Not Copy VTMS2431 66 ...

Page 70: ...i jack YPbPr Audio RCAx2 Flash PC D Sub HDMI ATSC Speaker 6Wx2 MSD809 DEMO COMBO TUNER MSD2248AL YAMAYA 148 S_VIDEO DDRx2 EAR PHONE OUT TPA6113A2 Aml7228 USB DPF MODULE DPF Y Pb Pr ADM3202 RS232 DPF Audio RS232 and ViewSonic Corporation Confidential Do Not Copy VTMS2431 67 ...

Page 71: ...220u 16V LESR I103 1084 3 3 1 2 3 4 ADJ VOUT VIN TAB R131 4 7K C109 100nF 0603 R124 100K 0603 R108 0R C165 47u 16V R111 0R C107 220u 16V LESR R184 4K75 1 0603 R180 NC C129 10u 16V R126 1K 1 0603 C166 NC C139 100nF R132 10K L124 NC R183 100K 1 0603 E B C SOT 23 Q101 NC 3904 1 3 2 C112 NC C134 1u 50V I104 1084 ADJ 1 2 3 4 ADJ VOUT VIN TAB C128 100nF C170 100nF L121 NC C163 100nF C116 220u 16V LESR C...

Page 72: ...212 NC 10uH C234 100nF C322 10u 16V R231 0R D202 NC 1 2 C341 100nF C224 100nF C229 100nF L202 NC 1uH 0603 R243 100R L201 NC 600R 1 5A 0805 C235 100nF R228 NC R223 220R 0603 R224 100R R218 499R 1 0603 R242 100R C241 100nF R229 1K R232 NC 0R R343 0R C251 100nF R220 1K 0603 C230 100nF C221 100nF R252 120R R219 1K R227 100R R240 4 7K R248 NC R361 NC 0R C242 10nF 0603 C238 100nF C243 10nF 0603 C227 10u...

Page 73: ...42 100nF 0603 R127 11K5 1 0603 R512 62R C509 100nF R587 NC 0 L502 600R 1 5A 0805 C506 10nF 0603 C504 1nF Q502 MMBT3904 1 3 2 R586 NC 2K2 I501 DTVS205EH201A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 NC NC NC NC NC NC RF_AGC NC NC VT IF IF IF_AGC IF_TP SCL SDA GND TU 5V NC AFT SIF OUT CVBS OUT GND GND GND GND GND GND GND GND C512 NC 680pF C513 NC 330pF R503 100K R...

Page 74: ... 3 4 5 6 7 8 9 10 11 12 13 SEL DOWN UP MENU GND LEDG LEDR POWER LEFT RIGHT IRIN IR5V IRGND R306 0 0603 C283 100nF I206 MSD2248AL 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 34 35 40 41 42 43 44 45 46 48 50 51 52 53 55 56 57 58 59 60 61 62 64 65 70 66 68 69 73 78 134 118 119 120 121 122 123 124 125 128 129 130 131 132 133 191 182 183 184 192 186 188 189 190 217 218 219 220 242...

Page 75: ...12 DDR_128Mb_TSOP66 29 30 31 32 35 36 37 38 39 40 28 41 2 4 5 7 8 10 11 13 54 56 57 59 60 62 63 65 26 27 24 23 22 21 20 47 16 51 44 45 46 1 18 33 3 9 15 55 61 34 48 66 6 12 58 64 49 52 14 17 19 25 43 53 50 42 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 AP A11 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 DQ9 DQ10 DQ11 DQ12 DQ13 DQ14 DQ15 BA0 BA1 CS RAS CAS WE LDM UDM LDQS UDQS CKE CLK CLK MVDD MVDD MVDD VDDQ VDDQ VDD...

Page 76: ...NC NC NC GND SDA SCL VCLK VCC R540 47R R541 47R R554 100R R590 NC R544 75R D508 4 7P C517 47nF R559 100R R551 4 7K D511 4 7P P502 DSUB 15 1 6 2 7 3 8 4 9 5 11 12 13 14 15 10 16 17 C518 47nF R546 510R R545 75R D512 4 7P D513 4 7P D525 4 7P R547 510R R548 2 4K D526 4 7P D507 4 7P C520 100nF R550 100R R560 10K R543 75R D506 4 7P D510 4 7P R589 NC R542 470R R555 100R R549 10K C519 1nF R552 4 7K R557 1...

Page 77: ...516 4 7P R598 220K C536 NC 10pF L503 3 3uH 0805 C522 100p C553 47nF R320 4 7K C545 560pF D517 4 7P C539 680pF R568 75R A B C D P505 RCJ 4 2 6 1 4 5 3 R561 47R R564 75R R570 47R D519 4 7P P503 MINI DIN4 MINIDIN8 6 2 8 1 3 7 5 4 9 L505 3 3uH 0805 C549 330pF C567 4 7u 0805 R574 75R C532 47nF C529 47nF C565 NC R594 220K C548 1uF 0603 R572 47R R569 47R D520 4 7P C570 4 7u 0805 C528 1nF C543 330pF C523 ...

Page 78: ... R523 6R8 C515 100nF R524 6R8 D503 1p R536 100R D501 NC 4 7P D502 1p S G D SOT 23 Q503 NC 2N7002 1 3 2 R533 4 7K R520 6R8 R528 100R P501 HDMI CON 3 1 5 15 16 6 4 2 18 17 19 9 7 8 11 10 12 13 20 21 22 23 14 DAT2 DAT2 Dat1 shield DDC SCL DDC SDA DAT1 DAT1 Dat2 shield 5V CEC DDC GND HPD DAT0 DAT0 Dat0 shield clk shield clk clk CEC SHIELD SHIELD SHIELD SHIELD VCLK R518 NC 100R R517 NC 0R D504 1p R535 ...

Page 79: ... 10K C648 330pF C643 1uF 0603 C652 330pF C645 560pF C649 330pF R729 10K C654 100nF C653 1uF 0603 R733 1K R736 100R C647 330pF R732 1K C665 NC C650 47uF 16V C666 NC C651 47uF 16V R659 NC 10K C646 560pF R731 12K E B C SOT 23 NC MMBT3904 Q606 1 3 2 L611 0 0603 R734 10K R735 10K R730 12K L601 0 0603 P602 PHONE JACK NORMAL CLOSE 1 9 8 7 6 2 3 4 5 10 11 12 13 14 PC_Audio AUR2 4 PC_Audio AUL2 4 PHONE_R 1...

Page 80: ... 24 25 26 27 28 29 30 31 32 11 PVDDREG AVDD INLP INLM VREF INRM INRP AVSS PLIMIT PVDDPR OUTPR1 PVSSR OUTMR2 OUTMR1 PVDDMR SLEEPN PROTN CKOUT MUTEN CKIN NCDRC0 NCDRC1 GAIN0 GAIN1 PVDDML OUTML1 OUTML2 PVSSL OUTPL1 OUTPL2 PVDDPL OUTPR2 R626 NC 82K I602 TPA6113A2 3 4 5 6 7 8 1 2 BYPASS GND SHUTDOWN IN2 VO2 VDD VO1 IN1 L612 NC 600R 1 5A L0805 R625 300K C611 0 47u 63V DIP R636 NC 6 8K L602 NC I603B NC L...

Page 81: ...O3 RXE1 RXE1 RXEC RXOC RXE2 RXE0 RXE3 RXEC RXOC RXE2 RXE3 RXO1 RXO2 RXO1 PANEL VCC C259 220u 16V LESR R699 NC 0 R695 NC 0 C321 100nF R694 470R 0805 R693 470R 0805 P106 PIN 15x2 2 0mm 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 RXO3 4 RXO3 4 RXOC 4 RXOC 4 RXO2 4 RXO1 4 RXO0 4 RXO0 4 RXE3 4 RXE3 4 RXEC 4 RXEC 4 RXE2 4 RXE2 4 RXE1 4 RXE1 4 RXE0 4 RXE0 4 PANEL VCC ...

Page 82: ...C 5 1R R362 NC 5 1R R314 NC 51K I504 NC AZ1045 04S 1 2 3 4 5 6 I 01 VDD I 02 I 03 GND I 04 R315 NC 100K C317 NC 47u 16V P205 NC USB A 1 2 3 4 5 6 VBUS D D GND SHELL SHELL C318 NC 1nF USB_DM 4 USB_DP 4 USB_OCD_N GPIO123 4 5V_General 1 2 3 4 VCC5V ST 1 4 6 7 8 ViewSonic Corporation Confidential Do Not Copy VTMS2431 79 ...

Page 83: ... 3 1 2 C932 0 1u L902 CHOKE 1 2 3 4 C950 5P 6KV C929 NC R916 33 C941 105 R944 33 C956 103 P904 1 2 C952 NC D915 BAV99 SOT R932 10K R953 3K C940 5P 6KV D907 BAV99 SOT C908 10n C951 103 R947 33 I902 NC 3 1 2 IN OUT GND C947 0 1u C946 0 1u D906 1N4148 C939 NC R903 10K C910 33n X7R R928 NC R970 3K C938 103 R905 220K Q906 2N7002 SOT23 R918 0 C904 2 2u C913 470u 35V R972 NC R957 1M R942 0 R914 1M R901 4...

Page 84: ... 16V C813 NC C830 680P R866 2R2 R801 12 1 R859 option 22 R814 10 R831 1K C805 150uF 400V Q802 2SC945P I801 LD7576 6 5 8 2 4 1 7 3 Vcc Drv HV FB GND Adj NC CS L804 5 2UH Z803 NC R827 1K L801 FERRITE CORE 4 5mm D806 UF4007 C811 0 047uF C834 NC R808 NC C801 0 47uF C810 10UF 50V C822 1000uF 16V C815 NC Z801 HZ12A 3 R843 3K C821 NC R803 910K 0805 R812 910K 0805 C827 10UF 50V Z802 HZ18A 3 D807 UF4004 Q8...

Page 85: ...3904 1 3 2 R402 10K C410 100u 25V C411 100nF C403 100n C0402 C405 NC C408 NC 22pF 1 1 1 1 1 1 C409 100nF C406 1uF 0603 R403 10K I403 1117 3 3 1 2 3 4 ADJ VOUT VIN TAB L402 4 7uH 1A CF09 100u 25V C413 100nF C404 NC R407 301k 1 R401 10K I402 MP2105 1 2V 1 2 3 4 5 EN GND SW IN FB R406 332k 1 L401 600R 1 5A 0805 L403 600R 1 5A 0805 I401 AP9435M 1 8 2 7 3 6 4 5 S D S D S D G D R405 100K C407 100u 16V R...

Page 86: ..._A_6 M1_A_7 M1_A_8 M1_A_9 M1_A_10 M1_A_11 DVSS12_PLL3 AVSS33_PLL3 DVSS12_PLL2 AVSS33_PLL2 VDD33 NC VDD12 VSS12 VSS33 VSS33 VDD33 DVDD12_PLL3 DVDD12_PLL2 DVDD12_PLL1 AVDD33_PLL3 AVDD33_PLL2 AVDD33_PLL1 VSS33 VSS33 DVSS12_PLL1 VSS12 VDD33 AVSS33_PLL1 VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 VDD12 MIO5 HD_CLK T_CPH1 VDD12 VDD12 VDD12 VDD12 VDD12 VDD12 VDD33 VDD33 FEC_D4 UART_RX FEC...

Page 87: ...DRAM2 DGND VCC_SDRAM2 DGND Core3 3V Core3 3V DGND DGND C487 100nF C489 100nF I407 MT48LC4M16A2 6ns IS42S16800A 37 1 14 27 3 9 43 49 28 41 54 6 12 46 52 36 40 38 21 20 19 18 17 16 15 39 2 4 5 7 8 10 11 13 42 44 45 47 48 50 51 53 23 24 25 26 29 30 31 32 33 34 22 35 CKE VDD1 VDD2 VDD3 VDDQ1 VDDQ2 VDDQ3 VDDQ4 VSS1 VSS2 VSS3 VSSQ1 VSSQ2 VSSQ3 VSSQ4 NC1 NC2 CLK BA1 BA0 CS RAS CAS WE DQML DQMH DQ0 DQ1 DQ...

Page 88: ... 75ohm Q403 NC 3906 3 1 2 R449 NC 51R L415 NC L416 0 22uH CF07 22pF Q402 NC 3906 3 1 2 R495 270K CF03 22pF R493 NC R491 1K R447 NC 200R CF21 10u 16V C498 10u 16V CF10 NC R454 560 L417 0 22uH R453 0R CF04 100pF R460 NC 200R CF25 22pF C495 10u 16V CF00 100pF R448 NC 200R R464 0 ohm R452 10K CF20 NC C496 NC R457 NC 51R Q404 NC 3906 3 1 2 CF01 NC R456 NC 200R CF05 100nF CF02 10pF CF22 100nF L422 600R ...

Page 89: ...403 4 7P R486100R R473 NC R475 10K R483 4 7K Q406 2N3904 1 2 3 CF19 100nF R478 1K CF14 100nF R482 10K P405 DB9_V 5 9 4 8 3 7 2 6 1 10 11 CF18 100nF R479 4 7K R481 47K CF15 100nF D404 4 7P I411 ADM3202 15 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND VCC C1P VP C1M C2P C2M VM TOUT2 RIN2 ROUT2 TIN2 TIN1 ROUT1 RIN1 T1OUT R484 4 7K I410 PIC12F675 I SN 1 2 3 6 7 8 4 5 VDD GP5 OSC1 CLKIN GP4 OSC2 GP1 GP0 VSS ...

Page 90: ...9 PCB Layout Diagrams 9 1 MAIN PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 87 ...

Page 91: ...9 2 MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 88 ...

Page 92: ...9 3 CON PCB TOP VIEW 9 4 CON PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 89 ...

Page 93: ...9 5 POWER PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 90 ...

Page 94: ...9 6 POWER PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 91 ...

Page 95: ...9 7 MMS PCB TOP VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 92 ...

Page 96: ...9 8 MMS PCB BOTTOM VIEW ViewSonic Corporation Confidential Do Not Copy VTMS2431 93 ...

Page 97: ...10 Exploded View And Exploded Parts List ViewSonic Corporation Confidential Do Not Copy VTMS2431 94 ...

Page 98: ...ViewSonic Corporation Confidential Do Not Copy VTMS2431 95 ...

Page 99: ...TER001A M3 6L MSWR17 FZMYI 2 24 M SCW 0824 0285 2084730082P SCREW BND T M3X8 BND T 2 25 M SCW 0824 6945 2080004000P SCREW SPE STAND OFF HEX 4 40UNC H5 5 7L 2 26 M SCW 0824 6719 2082630062P SCREW M3X6 P 0 5 1 27 C 00009328 2071895900P BRACKET FIX N2430P FOR HINGE T 1 0mm 1 28 M SCW 0824 6719 2082630062P SCREW M3X6 P 0 5 2 29 NA 2072055233P METAL FITTG I O JC240A B IO SIDE SECC 0 6T PHOTO 1 30 NA 20...

Page 100: ...431 1M VS12335 2M USA DC 00009539 2001132046P Main Source 6P80 16 GUARANTY CARD VIEWSONIC VTMS2431 1M QSG ENGLISH DC 00009540 2002310806P Main Source 6P81 17 ATTACH SHEET VIEWSONIC RETURN PREVENTION FLYER LCD TV DC 00009054 2001950220P Main Source 6P83 18 GUARANTY CARD VIEWSONIC VTMS2431 1M QSG FRENCH DC 00009541 2002310807P Main Source 6P84 19 Electronic Components CRT EEPROM Fly Back Transformer...

Page 101: ... NA 2080003700P SCREW SPE ISZZTER001A M3 6L MSWR17 FZMYI 2 PC 41 NA 2084730082P SCREW BND T M3X8 BND T 2 PC 42 NA 2080004000P SCREW SPE STAND OFF HEX 4 40UNC H5 5 7L 2 PC 43 NA 2082630062P SCREW M3X6 P 0 5 1 PC 44 NA 2071895900P BRACKET FIX N2430P FOR HING T 1 2MM 1 PC 45 NA 2082630062P SCREW M3X6 P 0 5 2 PC 46 NA 2072055233P METAL FITTG I O JC240A B IO SIDE SECC 0 6T PHOTO 1 PC 47 NA 2027274901P ...

Page 102: ... Description 5 Adjusting Procedure 6 Trouble Shooting Flow Chart 7 Block Diagram 8 Schematic Diagrams 9 PCB Layout Diagrams 10 Exploded View And Exploded Parts List 11 Recommended Spare Parts List B Are you satisfied with this Service Manual Item Excellent Good Fair Bad 1 Service Manual Content 2 Service Manual Layout 3 The form and listing C Do you have any other opinions or suggestions regarding...

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