ViewSonic VTMS2431 Service Manual
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ViewSonic VTMS2431 Service Manual

23.6” lcd tv
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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

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  • Page 1: Service Manual

    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: 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

    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 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 4: Precautions And Safety Notices

    (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 Confidential - Do Not Copy VTMS2431...
  • Page 5 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...

  • Page 6: Specification

    2. Specification LCD panel of this product shall be provided by “CMO” with a model number of M236H1-L01.The following table defines this panel specification. Any changes in panel must be pre-approved by ViewSonic in written. Parameter Specification a-Si TFT Active Matrix Wide Color, Transmissive Mode,...
  • Page 7 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 following table.
  • Page 8 The product firmware of VS12335-2M shall have a firmware version of V2.00EB0. Any changes/revisions afterward shall also be pre-approved by ViewSonic in written. For VS12335-1M, its firmware shall have a built-in frequency table for NTSC/ATSC off-air TV/CATV, and with MTS implementation.
  • Page 9 Bottom to top, Top to bottom Slideshow mode Left to right, Right to left SETUP Door close, Door open Horizontal cross, Vertical cross Movie repeat mde Repeat all, Repeat one Auto run On, Off ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 10 Molded Plastic Workmanship shall be inspected according to ViewSonic Molded Plastic Parts Specification, VSCMPPSPEC001V1.2. Screen Printed Parts, Bird Artwork shall be provided and confirmed by ViewSonic. Logo Recess Rear Label A label identifying the product name, model/serial number and FCC ID/Logo shall be placed into the rear label recess located on the rear panel of the chassis.
  • Page 11 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...

  • Page 12: Front Panel Function Control Description

    Channel down when source is TV, or select a control while in CH Down OSD menu. CH Up Channel up when source is TV, or select a control while in OSD menu. INPUT Select input source. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 13: Rear View Of The Product

    YPbPr/ DVI Audio input the corresponding connectors on your A/V device. (left/ right) Connect the RGB Audio Out on your computer to the RGB Audio PC Audio input on the rear of the LCD TV. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 14 Connect this jack to your Cable or VHF/UHF antenna. 12 RS232 signal 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 input and refer to RS232 Protocol on page 45 to 55. (The RS232 application software is not supplied with TV.)

  • Page 15: Connecting The Lcd Tv

    ☼ • 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...

  • Page 16: Remote Control

    ( For China area ) ( For Hong Kong area ) ( For China area ) ( For Hong Kong area ) ( For China area ) ( For Hong Kong area ) ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 17 Return to photo thumbnail screen or stop the movie playing and go back to the Movie Preview screen ※ Button 9~12, 24~27 only works under Movie mode of the USB input source. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 18: Storing Channels Into Memory

    (► will only appear when the control is highlighted) 6. Press ◄► to adjust or select the settings. 7. Press MENU to exit from the OSD menu. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 19: Favorite Channel Setting

    4. To cancel the selection, Press ENTER again on the selected channel. 5. Press MENU to exit. ＊To view your favorite channels, press FAV button to show Favorite List and select your favorite channels that have already been stored. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 20 5. Use ▲ or ▼ to choose letters or signs, ◄ or ► to move forward or backward. 6. After you input the channel name, press MENU or ENTER to complete the setting. 7. Press MENU to exit. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 21: Adjusting The Settings

    (2) Press ◄ or ► to select your desired top Menu. (3) Press ▲ or ▼ to select the control with ►, including “Treble/Bass”, “Closed Caption”, “Restore Default”, then press ► to perform the function or enter detailed settings. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 22: Closed Caption Setting

    Advanced Selection, and use ◄ or ► to make your choice. Basic Selection: To set basic analog closed caption options. (CC1~CC4, TEXT1~TEXT4, Off) Advanced Selection: To select closed caption signal formats and set up caption modes for digital TV channels. (Service1~6, Off) ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 23 3. Press ENTER or ▼ to enter Password. 4. Enter the password. (The default password is 0000) 5. Move to “System Lock”, and select “On” to enable the detailed settings. 6. Move to “US” or “Canada” rating system. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 24 PG-13 (recommended for children 14 years of age or older) R (mature audience) NC-17 (no one under 17 years of age) X (adult audience only) N/A (not applicable) 3. Press MENU to exit. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 25 8ans+ (children eight years and older) 13ans+ (not appropriate for children of less than 13 years) 16ans+ (not appropriate for children of less than 16 years) 18ans+ (reserved to adults) EXEMPT (exempt) 4. Press MENU to exit. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 26 4. Enter your new password again on “Confirm Password”. After you complete the last step, the screen will return to the top page of LOCK menu. If so, the password has been changed successfully. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 27 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 complete user guide from www.viewsonic.com and refer to RS232 Protocol on page 45~55. ViewSonic Corporation...

  • Page 28: Using Pc Function

    TV will automatically turn into power-saving mode after a few seconds’ idleness. Press INPUT or POWER button on the remote control and the TV will return to VGA mode. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 29 Use arrow keys to navigate between the movie files, and you can preview the movie in the window on the right side of the screen. ＊When playing the movie in the preview screen, audio will be muted. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 30 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 Corporation Confidential - Do Not Copy VTMS2431...
  • Page 31 (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 Confidential - Do Not Copy VTMS2431...
  • Page 32 ＊To adjust the setting of Contrast, Brightness, Sharpness, Tint, or Color in USB source, switch to YPbPr source and adjust in PICTURE Menu. Notes:Initial password:0000 If you forget your initial password,you can press"3660"to resume. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 33: Circuit Description

    RIN1P Analog Input Analog Red Input from Channel 1 24 BINM Analog Input Reference Ground for Analog Blue Input 25 BIN0P Analog Input Analog Blue Input from Channel 0 26 GINM Analog Input Reference Ground for Analog Green Input 27 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 34: Hsync0 Schmitt Trigger Input

    AUOUTL0 Analog Output Main Audio Output Left Channel 0 76 AUOUTR0 Analog Output Main Audio Output Right Channel 0 77 AUCOM Analog Input Reference Ground for Audio Line Input 63 TS Input Interface ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 35 GPIO97 I/O General Purpose Input/Output; 4mA driving strength 167 GPIO45/I2S_IN_BCK I/O General Purpose Input/Output; 4mA driving strength / Audio Bit Clock Input 104 GPIO44/I2S_IN_WS I/O General Purpose Input/Output; 4mA driving strength / Word Select Output; 4mA driving strength 103 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 36 DDCR_DA I/O w/ 5V-tolerant DDC Data for ROM 126 DDCR_CK I/O w/ 5V-tolerant DDC Clock for ROM 127 XIN Analog Input Crystal Oscillator Input 255 XOUT Analog Output Crystal Oscillator Output 254 Power Pins ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 37 As with standard SDRAMs, the pipelined, multibank architecture of DDR SGRAMs allows for concurrent operation, thereby providing high effective bandwidth by hiding row precharge and activation time. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 38 VideoAMRISCTM engine. The hardware and microcode combination is capable of decoding normal D1 size video sequence at full speed, and JPEG pictures with no limits. Pixel based de-interlacing is applied to the video sequence for high quality video output. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 39 Mass-Storage (MS) class, Picture Transfer Protocol (PTP) and PictBridge protocol. The AVOS USB firmware also supports multiple file systems and includes flexible file transfer functions between USB devices. I410 PIC12F675 A microprocessor to power-on the TV set when receiving the power-on code from RS232. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 40: Adjustment Procedure

    Figure 4, Set Color bar to 100 IRE then move the cursor to the White Balance figure 5. Press “►” Key figure 6. That will do auto white balance. Finally change 16 gray scale must be claire in each grays. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 41 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 TIMING is right. 6. OSD FUNCTION TEST Time:1920*1080@60Hz Pattern: 16*12 pane Make sure that Each FUNCTION has one right action. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 42 B. Input full white pattern then measure the luminance. For example Value A C. Input full dark pattern the measure the luminace. For example Value B D. These two value ratio must be more than 10000. (A/B). ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 43 613.75 655.00 614 – 620 615.25 619.75 661.00 620 – 626 621.25 625.75 667.00 626 – 632 627.25 631.75 673.00 632 – 638 633.25 637.75 679.00 639 – 644 639.25 643.75 685.00 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 44 630 –636 631.25 635.75 677.00 336 – 342 337.25 383.00 636 –642 637.25 693.00 341.75 641.75 342 – 348 343.25 347.75 389.00 642 –648 643.25 647.75 689.00 348 – 354 349.25 353.75 395.00 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 45 DIGITAL CABLE TV Frequence Table (table 3) U.S.A Channel Frequency Assignments (Cable) unit:MHz. CH NO. DTV Center Freq CH NO. DTV Center Freq CH NO. DTV Center Freq ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 46 (3). After all of FUNCTION TEST completed, we must erase all saved changes again and restore the factory defaults. DTV TEST ITEM CHANNEL FREQUENCY SOUND PETTEN CHECK CONTENT Dynamic 471.25MHz Picture picture 603.25MHz Color bar Color Dynamic 801.25MHz Sound and Picture picture ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 47 LEVEL<45~85> dBu, regards as normally. TIMING TABLE (FACTORY PRESET MODE) (table 4) Resolution V-freq D-SUB DVI TO HDMI HDMI 1920x1080 1680x1050 59.8 1440x900 59.8 59.9 1280x1024 1024x768 832x624 800x600 640x480 720x400 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 48 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 VTMS2431...
  • Page 49 Press the “config” , if the the ISP board have been found ,you will see the picture as bellow. pc.4 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...
  • Page 50 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 remote contral operation for these may cause the USB function shut down and never work again. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 51 - RS-232 cable - Barcode Reader - VGA Cable VTMS2431M LCD TV DDC Card 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...
  • Page 52 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...
  • Page 53 2. Choose model number the 3. Press “ENTER” key. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 54 4. Press “F4” key and Input bar code ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • 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...
  • Page 56 VTMS2431M LCD TV 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...
  • Page 57 3. Connect DDC 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...
  • Page 58 3. Press “ENTER” key. 4. Press “F4” key. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 59 5. Input bar code 6. Press “ENTER” key, then the successful picture is as follows. “DDC DOWNLOED 7. Exit program ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 60 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) 1.User’s Guide 2.Guarant Card 3.Battery Power Cord Remote contrl Figure 3 Figure 4 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 61 PACKING PART LIST (VTMS2431) ViewSonic Model Number: VS12335-2M Rev:1a Item ViewSonic P/N Ref. P/N Description Q'ty VTMS2431M monitor P-00009381 2013054075P POLYETHY BAG P-00009323 2012114500P POLYFOAM(R) 2012154600P POLYFOAM(L) P-00008947 2013222536P POLYETHY BAG 2001132017P CD-OWNER GUIDE DC-00009541 2002310807P GUARANT CARD A-00005362 2427130046P...
  • Page 62 Disassembly of Stand from LCD TV. 1.1 Unscrew 4 screws to move Stand Unit and Dust Cover . Stand Dust Cover 2. Disassembly of Rear Cover. 2.1 Unscrew 10 screws in the Rear Cover. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • 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. Fig.1 Fig.2 Rear Cover ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 64 Disassembly of Main Board, Power Board, Front Cover and Panel Unit. 3.1. Unscrew 8 screws to remove Bracket fix and Dust cover. Bracket fix Dust cover. 3.2. Unscrew 5 screws to move KeyPad Board KeyPad Board ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 65 3.3. Unscrew screws 5 to move Shield Plate . Shield Plate 3.4. Unscrew 7 screws and disconnect the wires to remove Mms Board and Main Board. Mms Board Main Board ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 66 3.5. Unscrew 4 screws and disconnect the wires to remove Power Board. Power Board 3.6. Unscrew screws 4 to move Panel Bracket . Panel Bracket ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 67: Trouble Shooting Flow Chart

    DTV-VDD33 D807,I801,I801 I204,SUROUND CAP I202 BEAD OK? SUROUND CAP OK? CHECK CHECK VCC1V2-STOK? D807,I801,I801 I105,SUROUND CAP I206 BEAD OK? SUROUND CAP OK? CHECK CHECK PANEL 5V OK? Q105,Q106 I107 D807,I801,I801 SUROUND OK? ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 68 Check Check Check Check YPbPr SOUCE YPbPr cable P504,SUROU I107,SUROUND R567, R570, R573 Check Check Check Check TV SOUCE RF CABLE I501TUNER L502 Check Check Check Check HDMI SOUCE HDMI P501SUROUN I502 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 69 Check Check Check Check I410 , I411 VCC3.3-ST RS232 peripheral P182 I206 peripheral Check Check Check Check Flash memory USB VCC1.2V I404, I412 and peripheral ATAPI-3.3V peripheral ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 70: Block Diagram

    MSD2248AL S_VIDEO RS232 ADM3202 (RS232) DPF Audio DDRx2 Aml7228 USB DPF Y Pb Pr DPF MODULE YPbPr PC(D-Sub) AV/SV Audio(RCAx2) Speaker YPbPr Audio(RCAx2) (6Wx2) YAMAYA 148 PC Audio(mini jack) EAR PHONE TPA6113A2 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 71: Schematic Diagrams

    C170 measure current 100k 100nF R134 R131 4.7K 4.7K Q105 VCC5V-ST MMBT3904 C169 R141 NC/0805 R133 PANEL-ON/OFF-GPIO11 4.7K Q106 PANEL-ON/OFF-GPIO11 MMBT3904 R135 Q107 VCC5V-ST MMBT3904 R142 R136 POWER-ON/OFF-GPIO44 Q108 4,10 POWER-ON/OFF-GPIO44 MMBT3904 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 72 100nF 100nF 100nF 100nF 100nF VOUT C256 C255 C257 C258 100nF 100nF 10u/16V R252 220u/16V LESR 120R R253 DTV-VDD33 DTV-AVDD33_ADC L204 600R/1.5A 0805 Using power plane C246 C247 C245 100nF 100nF 10u/16V ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 73 R511 ATV_CVBS Q501 NC/MMBT3904 Close to Mstar IC L501 R588 0R 0805 R512 C511 CVBS+ 100nF TV_IN+ TV_IN+ R513 C512 C513 R514 1K 0603 NC/680pF NC/330pF NC/75R R515 C514 100nF TV_IN- TV_IN- ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 74 I211 C316 R337 R339 24C04 100nF 4.7K 100R VCC5V-ST Q202 R295 , R309 ------ JEAN STD 10u/16V MMBT3906 R291 , R306 ------ CUSTOMER 24C04_I2C-SCL R312 100R R333 24C04_I2C-SDA R313 100R R334 R335 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 75 VSSQ VDDQ VSSQ VDDQ VSSQ VDDQ +2.6MVDD2 L216 2M X 16bit X 4BK Z=120ohm/0603 3A C202 Qimonda L0603 100uF/16V C209 C210 C343 C344 C345 C346 HYB25DC256163CE-4(16X16) 100nF 100nF 100nF 100nF 100nF 100nF ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 76 1,4,7,8,12 VCC5V-ST UART-RX DDC_SDA_D R590 NC UART-TX VCC5V-ST UART-TX D514 BAT54C R555 R556 VGA-TX R557 100R VGA5V 100R 100R VGA-RX R559 100R C520 I503 R558 100nF 24C21 R560 VGA-VCLK VCLK VGA-SCL VGA-SDA ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 77 C538 3.3uH 0805 47nF C548 CVBS_IN CVBS1_IN R583 1uF/0603 CVBS1_IN RC_AUL1 AUL1 AUL1 C540 C539 R577 D520 330pF C551 680pF D524 C550 R585 560pF 330pF 4.7P 4.7P RCA Audio Input (ADC IN) ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 78 HDMI-5V C515 R531 R532 HDMI-HPDIN 100nF R533 VCLK Q504 4.7K HPD_CTRL HPD_CTRL MMBT3904 HDMI_SCL R534 100R HDMI-SCL HDMI_SDA R535 100R HDMI-SDA 100R R536 DDC_SCL DDC_SCL 24C22 SMD 100R R537 DDC_SDA DDC_SDA R538 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 79 1: HEADPHONE MODE R601 5VAMP PHONE_DET R735 10K R736 100R 5VAMP 1,10 R659 C653 C654 NC/10K 1uF/0603 Q606 100nF NC/MMBT3904 modify C653 footprint from C0805 to C0603 and add cap 1uF 080910 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 80 PHONE_R PHONE_R 1uF/0603 PHONE_L PHONE_L 5VAMP SHUTDOWN R648 Q601 MMBT3904 I602 TPA6113A2 MUTE_S/GPIO124 MUTE_S/GPIO124 R649 I602 foodprint from "SPDSO08" modify to "SO08" ; C642 cap value from 470n modify to 1uF 080901 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 81 R694 R693 470R 0805 470R 0805 PIN 15x2 2.0mm CMO M260J3-L01: C321 C259 R695 100nF R699 220u/16V LESR LVDS Panel ( Header Type ) CMO M220J1L01: R695 R699 AUO M215HW01: R695 R699 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 82 NC/100K L209 NC/80R 0805 6A C317 P205 NC/47u/16V NC/USB-A 2.2A R362 NC/5.1R VBUS USB_DM USB_DM USB_DP USB_DP R363 NC/5.1R SHELL I504 VCC5V-ST SHELL I/03 I/02 VCC5V-ST 1,4,6,7,8 C318 I/04 I/01 NC/1nF NC/AZ1045-04S ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 83 C953 C925 R976 D915 C956 C959 D914 C954 D913 D907 C941 220K R959 Q907 330K BAV99/SOT 2N7002/SOT23 BAV99/SOT BAV99/SOT C952 C951 C960 C962 BAV99/SOT C939 C961 Q906 2N7002/SOT23 R977 270 C942 Z905 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 84 C802 R827 R828 JT240XX C827 82K5 1% 100pF I803 R825 option C803 10UF/50V TL431D 1.3K 1% NC of 100pF R858 R866 JT240XX R851 1.1K/1% S801 OPTION 1K.1.21K of AC IN 100~240V JC240XX ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 85 301k 1% DGND DGND ATAPI_3.3V DAC_3.3V USBGND FECGND DGND I403 1117-3.3 L403 Audio_GND VOUT C410 600R/1.5A 0805 C412 C413 C414 100nF 100u/25V 100nF C411 47u/16V 100nF DGND DGND DGND DGND TO MPEG ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 86 100u/16V 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 4.7uF/0805 47u/16V 100u/16V 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF 100nF DGND DGND DGND ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 87 M2_A6 RESET_N RESET RESET_N M2_A5 M2_A4 F_nCS C494 F_nCS M2_A3 F_nOE 100nF F_nOE M2_A2 M2_WE_n M2_WE_n M2_A1 M2_A[0..11] M2_A0 DGND A-1/DQ15 M2_D[0..15] M2_D11 R442 GND1 R443 4.7K Core3.3V GND2 MX29LV320DT-B DGND DGND ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 88 UART-TX L418 DPF_K1 OSD-POWER-KEY DPF_K1 OSD-POWER-KEY Q404 DPF_K2 R/Cr/Pr DPF_K2 +5V_General NC(3906) R464 DPF_IR VCC3.3V-ST DPF_IR 0.22uH +5V_General R463 VCC3.3V-ST 75ohm CF07 CF08 22pF 100pF 0 ohm CF06 CF05 DGND 100nF 100uF/16V ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 89 ROUT2 R486100R MTXD UART-TX T1OUT TIN1 UART-TX MC2P TOUT2 TIN2 CF16 MC2M 100nF DB9_V CF17 CF18 CF19 100nF 100nF 100nF ADM3202 pin2,pin3 FOR NULL MODEM TX 20V , RX 10V RS_232 CABLE ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 90: Pcb Layout Diagrams

    9. PCB Layout Diagrams 9.1. MAIN PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 91 9.2. MAIN PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 92 9.3. CON PCB TOP VIEW 9.4. CON PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 93 9.5. POWER PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 94 9.6. POWER PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 95 9.7. MMS PCB TOP VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 96 9.8. MMS PCB BOTTOM VIEW ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

  • Page 97: Exploded View And Exploded Parts List

    10. Exploded View And Exploded Parts List ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 98 ViewSonic Corporation Confidential - Do Not Copy VTMS2431...
  • Page 99 Exploded Parts List ( VTMS2431 ) ViewSonic Model Number: VS12335-2M Rev:1a Item ViewSonic P/N Ref. P/N Description Q'ty 2024285401P FRONT BEZEL VT2430 ABS 94HB G.L BLACK C 2053760201P LED INDIC.-PWR N2430P UT0520T COLOR T57015 2033154000P IR COVER N2430P PC GE-121R-21051...

  • Page 100: Recommend Spare Parts List

    Remark 1: Above listed items are examples, supplier can expand the rows to add more necessary item 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 between this version and prior versions.
  • Page 101 1.83M BLACK C-00009218 2603207447 STAND ASSY VT2430 ABS 94HB G.L BLACK C C-00009456 2603408223 CABI BACK ASSY VTMS2431-M ABS 94HB G.L BLACK C (PHOTO) 2603807190 NECK ASSY N2430P ABS 94HB BLACK C 2086240102P SCREW P SW+ M4*10 PSW+ ZN 2084740104P...
  • Page 102 C. Do you have any other opinions or suggestions regarding this service manual? Reader’s basic dada: Name: Title: 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. ViewSonic Corporation Confidential - Do Not Copy VTMS2431...

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