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Dynex DX-LDVD19-10A Service Manual

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DYNEX
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does
not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products
powered b electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the
product deal with in this service information by anyone else could result in serious injury or death.
SERVICE MANUAL
WARNING
2009 (Qingdao Electronics
All rights reserved. Unauthorized copying and distribution is a violation of
law.
COLOR TV
Model No.
DX-LDVD19-10A
limited company
1
)

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Summary of Contents for Dynex DX-LDVD19-10A

  • Page 1 SERVICE MANUAL COLOR TV Model No. DX-LDVD19-10A WARNING This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered b electricity should be serviced or repaired only by experienced professional technicians.

  • Page 2: Table Of Contents

    CONTENTS Table of contents ………………....………………….……….2 1. General Information …………....…………………………..4 1.1 General Guidelines................4 1.2 Important notice…………………………………………………………..…4 1.3 How to read this Service Maunal…………………………………………..5 2. SPECIFICATIONS ………………………………………………….…...7 3. LOCATION OF CONTROLS AND COMPONENTS …..…..8 3.1Board Location……………………………….. ………….……………..…..8 3.2 A Board----Main Board………………………………...…………...……..8 3.3 B Board----Power Board……………………………..…………..……..12 3.4 LCD Panel………………………………..
  • Page 3 6.3 Setting up Your Remote Control…………………………………..……..23 7. MEASUREMENTS AND ADJUSTMENTS …………………..26 8. Electrical parts ……………………………...…………………………..30 8.1 Wiring Connection Diagram…………………..……………………..……30 8.2 Block Diagram…….………………………………..……….…………..32 8.3 Circuit Diagram……………………………….........32 9. Trouble Shooting Guide …………………………………………..50...

  • Page 4: General Information

    1. General Information 1.1 General Guidelines When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

  • Page 5: How To Read This Service Manual

    1.2.6 Take Care to Deal With The Cathode-Ray Tube In the condition that an explosion-proof cathoderay tube is set in this equipment, safety is se-cured against implosion. However, when removing it or serving from backward, it is dangerous to give a shock.
  • Page 6 may damage equipment, loose data, get an unexpected result or has to restart(part of) a procedure. Warning: A “warning” is used when there is danger of personal injury. Reference: A “reference” guides the reader to other places in this binder or in this manual, where he/she will find additional information on a specific topic.

  • Page 7: Specifications

    2. Specification Screen Size 18.5" Display Type Panel Supplier Panel Technology Panel 60 Hz vs.120 Hz 60Hz Display Resolution 720P Panel Resolution 1366(H)x768(V) Backlight Technology CCFL Aspect Ratio 16:9 Contrast Ratio 1000:1 Brightness cd/m2 Panel Native Color Temperature 6500 Uniformity 0.75(9point) Response Time - Fact Tag Panel Bit Depth...

  • Page 8: Location Of Controls And Components

    3. LOCATION OF CONTROLS AND COMPONENTS 3.1 Board Location A Board B Board Description A Board Main Board B Board Power supply Board Speaker 3.2 A Board----Main Board 3.2. 1 Function Description: Main Board Process signal which incept from exterior equipment then translate into signal that panel can display. 3.2.2 Connector definition...
  • Page 9 Main board connector LVDS Connector (CN7) PIN 1 Pin number Signal name Description LVDSVDD Power for panel Ground LVDS EVEN 0 - Signal LVDS EVEN 0 + Signal LVDS EVEN 1 - Signal LVDS EVEN 1 + Signal LVDS EVEN 2 - Signal LVDS EVEN 2 + Signal 13,14 Ground...
  • Page 10 LVDS EVEN 3 + Signal 25,26 Ground Power supply and Inverter Connector CN3 PIN 1 number Signal name Description Ground Ground Power Power Audio Output Connector CN1 PIN 1 number Signal name Description...
  • Page 11 Audio Output Ground Ground Audio Output Connector PIN 1 number Signal name Description Power Ground Connector Connector Connector Connector Connector Connector Connector DVD Power Connector (CN5) PIN 1 number Signal name Description stand by 5V Power Ground Ground 12V Power DVD Video Connector (CN6)

  • Page 12: B Board

    PIN 1 number Signal name Description DVD_SW DVD_PB Pb Signal DVD_Y Y Signal Ground DVD_PR Pr Signal Ground DVD_IR IR control DVD Audio Connector (P1) PIN 1 number Signal name Description DVD_L_IN Left track DVD_R_IN Right track Ground Update Connector (CN4) PIN 1 number Signal name...

  • Page 13: Lcd Panel

    Power supply and Inverter Connector CN10 number Signal name Description Ground Ground Power Power Other Connector AC150V~AC240V Input (CN13) Power supply for panel (CN11) Power supply for panel (CN12) 3.4. LCD PANEL.
  • Page 14 Connector definition...

  • Page 16: Disassemble And Assemble

    4.1 Remove the Pedestal ① Remover the six screw indicated with ② Turn to front cover upwards Remover pin indicated with 4. 3Remove the LCD panel ① ① Lay down the unit so that rear cover downward ② Remove the two screw from the pedestal indicated with Then remove the pedestal .

  • Page 17: Remove The Main Board

    4.7Remove the Speaker 4.4 Remove the Main Board ① Remover the four screw indicated with 4.8Remove the Keypad Assembly Remover the two screw indicated with Remover the four screw indicated with ≯. 4.5 Remove the Power Board Remover the two screw indicated with 4.9Remove the Remote Control Board Remover the four screw indicated with...

  • Page 18: Installation Instructions

    5. INSTALLATION INSTRUCTIONS Accessories Remote Control User Manual Battery...

  • Page 19: Connecting An Antenna Or Cable Tv

    Connecting an antenna or cable TV 5 Select the channel you want with the remote control for the cable box. To connect an antenna, cable TV, or satellite TV box: 1 Connect one end of a 75 ohm cable (not included) to the RF OUT jack on the antenna or on the cable or satellite TV box.

  • Page 20: Connecting A Component Video Device

    For a better picture, you can connect an S-Video cable to the To play from the HDMI device: 1 Turn on your TV, then press INPUT select HDMI. S-VIDEO Out jack on the VCR and to the S-VIDEO IN jack on your 2 Turn on the HDMI device, and set it to the correct output mode.

  • Page 21: Operation Instructions

    6. OPERATION INSTRUCTIONS Basal information 6.1 Front panel controls TV components Front and side panels MENU INPUT POWER Component Description MENU Press to open the on-screen menu. INPUT Press to select the video input source. VOL+/VOL- Press to increase or decrease the volume. CH+/CH- Press to go to the next or previous channel in the channel list.

  • Page 22: Back Panel Controls

    6.2 Back panel controls Back Component Description HDMI jack Connect an HDMI device, such as a cable box or DVD player, to this jack. An HDMI cable carries both video and audio, so you do not need to make an audio connection. For more information, see “Connecting an HDMI device”...

  • Page 23: Setting Up Your Remote Control

    6.3 Setting up Your Remote Control Remote control POWER INPUT OPEN/CLOSE MTS/SAP PICTURE SLEEP GUIDE RECALL MUTE ENTER MENU INFO CH.LIST FAVORITE ZOOM EXIT TITLE DISPLAY SETUP SUBTITLE NEXT PREV MENU STOP PAUSE PLAY/ENTER SLOW ANGLE ZOOM T.SEARCH AUDIO PROGRAM REPEAT Button Description Press to turn on your TV.

  • Page 24: Using The Remote Control

    Button Description Button Description CH+/CH- Press CH+ or CH- to go to the next or SETUP Press to open the DVD General Setup Page. previous channel in the channel list. For more Press twice to open the DVD Preference Page. VOL+/VOL–...

  • Page 25: Aiming The Remote Control

    For more help, call technical support for your universal remote Do not use the remote control in an area with high humidity. control or set-top box manufacturer, or call the Dynex Customer Care Center at 1-800-305-2204. Do not place the remote control in direct sunlight.

  • Page 26: Measurements And Adjustments

    7. MEASUREMENTS AND ADJUSTMENTS The way to the factory mode menu: First: press menu, Second: choose the AUDIO Third: input 8893. Finished these operations, system will be into the factory mode menu. Press select articles, and then press the Right or enter button to sub-menu. Software Upgrade White Balance/Color Temp...
  • Page 27 Picture Mode Setting Audio Mode Setting...
  • Page 28 SSPLL Setting IF you want to exit this factory menu, please press the button” Exit” in the remoter. 7.1 Picture 1 Press MENU. The on-screen menu opens with the Picture menu displayed, then press ENTER/CH- . The Picture menu opens. 2 Press CH+ or CH- to highlight an option, then press ENTER/VOL+ to enter the sub-menu.
  • Page 29 7.2 Audio 1 Press MENU. The on-screen menu opens. 2 Press VOL+ or VOL- to highlight AUDIO, then press ENTER/CH-. The Audio menu opens. 3 Press CH+ or CH- to highlight an option, press ENTER/VOL+ to open the sub-menu, then press CH+/- to adjust.

  • Page 30: Electrical Parts

    7.3 CHANNELS 1 Press MENU. The on-screen menu opens. 2 Press VOL+ or VOL- to highlight CHANNELS, then press ENTER/CH-. 7.4 SETTINGS Parental controls let you prevent your children from watching inappropriate material on TV. When set, parental controls read the rating of the program (with some exceptions, such as news and sports) and deny access to programs that exceed the ratings level you select.
  • Page 31 DX-LDVD19 - 10A customer type LX19 T2W special number DC16 K 0E0100 special technique AT09SR0305US04 document number export country AMERICA customer brand DYNEX Standard- Workout Auditing Approve ization...

  • Page 32: Block Diagram

    America customer BESTBUY brand DYNEX Explain: The line bundle screw and the damageable element that does not mark in explosion picture please refer to BOM reference reference name special number standard number...

  • Page 50: Trouble Shooting Guide

    9. TROUBLE SHOOTING GUIDE 9.1. Simple check Verify if the television is properly plugged No Picture, no sound Verify if the television is properly supplied power Verify if electricity is available Verify if correct signals are input Press INPUT button to change signal input to TV input Blank screen Restart the television of power supply is interrupted Press Mute button and verify if Mute mode is set.

  • Page 51: Main Board Failure Check

    State : No power First, check cables which connect with PSU, then check as follows 1) Check PSB input voltage AC input voltage : 120V Connector: CN13 2 Check PSB output voltage orderly Voltage: +12V, +12V Connector: CN10 9.3 Main board failure check...
  • Page 52 9.3 Main board failure check State: No picture No Sound (All Mode) Fail Check the input Change Source input Source Pass Fail Check the input/output Re-soldering or change Of IC U22 of Main B/D IC U22 Pass Fail Check the input/output Re-soldering or change Of IC U53 of Main B/D IC U53...
  • Page 53 State No picture No Raster on Panel Fail Check the backlight Change the backlight B/D Pass Re-soldering or change Fail Check the input/output of IC U1 and RNA1-17 jack CN2 of Main B/D Pass Fail Check the input/output of Re-soldering or change Jack CNC1 of Main B/D IC U1 Pass...
  • Page 54 Part Name Description Phenomena Failure cause Block Defect :TCP cracking or cracking V B/D Vertical bar Dim or L/D :TCP Sunken :TCP lead cracking :ACF bonding short Vertal gray :Awful environment and something electric enter into V Dim line :Mis-align between TCP and Panel Vertical color :Panel failure V L/D...
  • Page 55 Failure Mode Part Name Description Phenomena Failure cause B/L normal, only White white screen Screen display Maybe caused by surge current and EDS B/L normal, only Black Black screen Screen display Circuit LCD Vcom imbalance FIIcker Crosstalk Abnormal Only color Capacitance improper bring crosstalk inside LCD Color abormal...
  • Page 56 wire Without backlight Operation abnormal or systemic noise open shut B/L shutdown in Short bitween lamp housing and wire, Because down sometime consume power too much ,white,balck F/M in B/L unit Rotundity wirelike Failure Mode Part Name Description Phenomena Failure cause Brightness Light bottom of LCM...
  • Page 57 Sincere Forever...

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