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HP LT3200 Service Manual
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HP LT3200 Service Manual

HP LT3200 Service Manual

High-definition lcd tv
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Download this manual See also: Illustrated Parts & Service Map, User Manual
High-Definition LCD TV Service Manual
Models: LT3200, LT3700, LT4200, LT4700

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Summary of Contents for HP LT3200

  • Page 1 High-Definition LCD TV Service Manual Models: LT3200, LT3700, LT4200, LT4700...
  • Page 2 Microsoft and Windows are trademarks of Microsoft Corporation in the U.S. and other countries. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty HP shall not be liable for technical or editorial errors or omissions contained herein.

  • Page 3: Table Of Contents

    Product Information ..............................6 Product Profile ................................. 6 Specifications................................6 LCD Panel Module..............................6 General TV Specifications LT3200 and LT3700 ..................... 7 General TV Specifications LT4200 and LT4700 ..................... 9 I/O Connectors ................................11 Factory Preset Display Modes..........................11 Controlling the Onscreen Display .......................... 12 TV Indicators and Controls ............................
  • Page 4 Power: TV Does Not Turn On............................. 77 Audio ..................................78 VGA Input................................... 79 HDMI Input ................................80 DVI Input ..................................81 YPbPr Input ................................82 TV/Video/S-video Input.............................. 83 Troubleshooting Tips ..............................84 No Power................................84 No Video ................................84 HP High-Definition LCD TV Service Manual...
  • Page 5 Main Board................................92 Wiring Diagram ................................93 Firmware Update Procedure............................ 94 Overview..................................94 Safe Software Update Procedure ..........................94 Introduction ................................94 Software Feature Requirement..........................95 Software Update Procedure............................95 Limitation of this Implementation.......................... 95 HP High-Definition LCD TV Service Manual...
  • Page 6 HP High-Definition LCD TV Service Manual...

  • Page 7: High-Definition Lcd Tv Service Manual

    AC plug with an extension cord, recommended by HP must exercise caution and be sure that receptacle, or the outlet unless the blades can be neither their safety nor the safe operation of the equipment fully inserted to prevent blade exposure.

  • Page 8: Safe Handling And Servicing

    The LCD module uses a high-voltage (maximum 450V an abnormality in the soldered areas. DC). Be cautious of electric shock and do not touch the device circuitry when handling the LCD unit. Because HP High-Definition LCD TV Service Manual...

  • Page 9: Repair Tips

    Pb-free solder until it melts, before applying Pb solder. • After applying Pb-free solder to double-layered boards, check the component side for excess solder that may flow onto the opposite side (see the following illustration). HP High-Definition LCD TV Service Manual...

  • Page 10: Suggested Pb-Free Solder

    • Never rub or scrape chip components as this may cause the value of the component to change. Similarly, do not slide the circuit board across any surface. HP High-Definition LCD TV Service Manual...

  • Page 11: Rework On Ball Grid Array (Bga) Ics

    If the quantity is too great, the SMD some temperatures and times. might crack or the solder lands might be torn loose from the printed board. HP High-Definition LCD TV Service Manual...

  • Page 12: Product Information And Specifications

    ASP technicians in the repair and refurbishment of HP flat-panel televisions. Product Profile HP High-Definition Digital TV models LT3200, LT3700, LT4200, and LT4700 can display ATSC, NTSC and Clear-QAM TV signals. All models also support High Definition Multimedia Interface (HDMI) and YPbPr (HD) display technology. All models can be used as monitors for your PC with a VGA connector.

  • Page 13: General Tv Specifications Lt3200 And Lt3700

    General TV Specifications LT3200 and LT3700 Model number LT3200 LT3700 Description 32” HDTV 37” HDTV Availability June 2007 June 2007 Brightness 500 cd/m2 500 cd/m2 Resolution 1366 x 768 1366 x 768 Contrast Ratio 1200:1 1000:1 Viewing Angle 176 degrees...
  • Page 14 40.7 lb/18 kg VESA wall mount standard VESA 200mm VESA 200mm Energy Star Front Bezel Trademarks Dolby Digital Dolby Digital Regulatory Safety compliance FCC Class B, C-UL and UI FCC Class B, C-UL and UI HP High-Definition LCD TV Service Manual...

  • Page 15: General Tv Specifications Lt4200 And Lt4700

    Theater, Music Hall SAP/MTS Component In (YPbPr) HDMI S-Video In Antenna In (RF) PC VGA In Connectivity Analog Audio In (L/R) PC Audio In RS-232c USB Port (service only) Audio Out SPDIF Out Composite HP High-Definition LCD TV Service Manual...
  • Page 16 VESA 200mm VESA 200mm Energy Star Front Bezel Trademarks Dolby Digital, e-Star (on top) Dolby Digital, e-Star (on top) Regulatory Safety compliance FCC Class B, C-UL and UI FCC Class B, C-UL and UI HP High-Definition LCD TV Service Manual...

  • Page 17: I/O Connectors

    60.023 75.029 78.750 VESA – – 1280 x 768 47.396 59.995 68.250 VESA – 1280 x 1024 63.981 60.020 108.000 VESA 1366 x 768 47.712 60.015 85.500 VESA 1920 x 1080 65.000 30.000 74.250 HP High-Definition LCD TV Service Manual...

  • Page 18: Controlling The Onscreen Display

    A - LED Amber: TV is powering on (light turns off after about 30 seconds). Indicator HP Aqua Blue: TV is off but plugged into the power source. No light: TV is on or AC power cord is disconnected. B - Remote Receives the signal from the remote control.

  • Page 19: Remote Control

    Numeric keypad Enter channel number. _ (Dash) Enter a dash for a subchannel number of a digital channel. Enter Select desired channel after entering the channel number with the numeric keypad. HP High-Definition LCD TV Service Manual...

  • Page 20: Tv Connectors

    The connectors listed in the table following the images are located on the right and left sides and back of the TV. While only one model is shown below, all four models (LT3200, LT3700, LT4200, LT4700) use the same connector configurations.
  • Page 21 HP High-Definition LCD TV Service Manual...
  • Page 22 HP High-Definition LCD TV Service Manual...

  • Page 23: Connectors

    DVD players and other audio/video devices equipped with component video output. You can connect two component video sources simultaneously by using the left column of ports for Source 1 and the right column of ports for Source 2. HP High-Definition LCD TV Service Manual...
  • Page 24 High Definition Multimedia Interface (HDMI) is an all digital audio/video interface. This series of TVs uses HDMI version 1.2 and supports 480i, 480p, 720p, and 1080i digital-format inputs. The TV automatically determines what format is being used by the currently connected device. HP High-Definition LCD TV Service Manual...
  • Page 25 RS-232 Port The RS-232 connector works like a serial port on a PC and is also sometimes called a serial port. It is used to receive digital instructions from control applications running on a computer. HP High-Definition LCD TV Service Manual...

  • Page 26: Basic Operation

    Basic Operation For more information about using your HP LCD TV, refer to the HP HD LCD TV User’s Guide included with your TV. There are two menus available – a customer-based menu (Simplemenu) and an advanced menu (Fullmenu). Simplemenu is the default setting.

  • Page 27: Osd Functions - Fullmenu

    Auto Sync Default Audio Mode Voice Standard Music User Treble User mode only Bass User mode only Balance Auto Volume SAP/MTS Mono Stereo English Spanish French Digital Audio Dolby Digital Virtual Surround Theater Music Hall HP High-Definition LCD TV Service Manual...
  • Page 28 TV-14 TV-MA Canadian English Canadian French 8 ans+ 13 ans+ 16 ans+ 18 ans+ Setup Time Clock Mode Auto Manual Clock Set Month, Day, YR, Hr. Min, AM/PM Time Zone Active for "Auto". AKST HP High-Definition LCD TV Service Manual...
  • Page 29 Style Font Size Default Small Standard Large Font Style Default Style0 Style1 Style2 Style3 Style4 Style5 Style6 Style7 Foreground Color Default White Black Green Blue Yellow Magenta Cyan Background Color Default White Black Green HP High-Definition LCD TV Service Manual...
  • Page 30 Edge Style4 Edge Style5 OSD Language English Spanish French Setup Wizard [ Start ] Input Labels Default Component 1 Component 2 CABLE HDMI 1 HDMI 2 HDMI 3 Default Settings [ Reset ] SimpleMenu™ HP High-Definition LCD TV Service Manual...

  • Page 31: Command Table Rs-232

    Command Table RS-232 Remote Commands Over RS232c Port The HP HDTVs include a male DB-9 RS-232 connector with the following pin out. Function 5, 10 1, 4, 6, 7, 8, 9 No Connect Set the RS-232c communications settings on the PC to match the TV’s communication conditions. The TV’s communications...
  • Page 32 Analog - Sap/Digital- audio2 Analog - Stereo/Digital- audio3 Sleep Timer Off Timer – 30 Min. Off Timer – 60 Min. Off Timer – 90 Min. Off Timer – 120 Min. Off Timer – 150 Min. HP High-Definition LCD TV Service Manual...
  • Page 33 Standard Cool Auto sync Auto sync only in PC mode Audio mode Voice mode Music mode Standard mode User mode Virtual Surround Theater Music Hall Internal Speaker Internal speaker off (SPDIF is still working) HP High-Definition LCD TV Service Manual...
  • Page 34 Month, if time mode is month manual (01~12) Set time day Day, if time mode is manual (01~31) Set time hour Hour, if time mode is manual (00~23) Set time Minute, if time mode is minute manual (00~59) HP High-Definition LCD TV Service Manual...
  • Page 35 All screen white mode Displayed for 3 minutes to (PDP only) help reduce the appearance of after image on the screen Black Level Light (0 IRE) Enabled component input only. Effective for 480i. Black (7.5 IRE) HP High-Definition LCD TV Service Manual...
  • Page 36 255=tune to last channel before turn power OFF. This command is valid only when SOURCE AT P-ON (SON) is set to 0 (TV Input). When both STC (Analog) and STA + STI are set, the last command set is effective. HP High-Definition LCD TV Service Manual...
  • Page 37 0 = Sound mute can be activated (Default). Blocks Mute function. When TV is in Mute status and receives MDI1, TV audio is activated. Then Mute button of remote and MUT0/1 (Mute On/Off) command is ignored. HP High-Definition LCD TV Service Manual...

  • Page 38: Return Messages

    For all return values: (add prefix with 0s, right justify). If volume is 89, return value will be 0089 (add ‘00’). If channel is 7, return value will be 0007 (add ‘000’). If Mute is 1, return value will be 0001 (add ‘000’). HP High-Definition LCD TV Service Manual...

  • Page 39: Replaceable Parts

    452127-001 Repair screw kit 34.37P06.001 (2) 452128-001 86.00G29.668 (4) 86.1A334.6R0 (4) 86.1A336.6R0 (10) 86.1H524.8R0 (4) 86.RA324.100 (2) 86.VA314.6R0 (4) 86.VA326.100 (4) 86.9A338.150 (8) 86.TA526.100 (4) VGA cord 453143-001 Whole unit – head only 451704-001 HP High-Definition LCD TV Service Manual...

  • Page 40: Model Lt3700

    452127-001 Repair screw kit 34.37P06.001 (2) 452128-001 86.00G29.668 (4) 86.1A334.6R0 (4) 86.1A336.6R0 (10) 86.1H524.8R0 (4) 86.RA324.100 (2) 86.VA314.6R0 (4) 86.VA326.100 (4) 86.9A338.150 (8) 86.TA526.100 (4) VGA Cord 453143-001 Whole unit - head only 451705-001 HP High-Definition LCD TV Service Manual...

  • Page 41: Model Lt4200

    452127-001 Repair screw kit 34.37P06.001 (2) 452128-001 86.00G29.668 (4) 86.1A334.6R0 (4) 86.1A336.6R0 (10) 86.1H524.8R0 (4) 86.RA324.100 (2) 86.VA314.6R0 (4) 86.VA326.100 (4) 86.9A338.150 (8) 86.TA526.100 (4) VGA cord 453143-001 Whole unit – head only 451706-001 HP High-Definition LCD TV Service Manual...

  • Page 42: Model Lt4700

    452127-001 Repair screw kit 34.37P06.001 (2) 452128-001 86.00G29.668 (4) 86.1A334.6R0 (4) 86.1A336.6R0 (10) 86.1H524.8R0 (4) 86.RA324.100 (2) 86.VA314.6R0 (4) 86.VA326.100 (4) 86.9A338.150 (8) 86.TA526.100 (4) VGA cord 453143-001 Whole unit - head only 451707-001 HP High-Definition LCD TV Service Manual...

  • Page 43: Replacement Parts List Reference Pictures

    Replacement Parts List Reference Pictures Note: Not every individual part for every model is shown here. However, you can use the pictures as a reference for all models. Picture Reference Picture of Replacement Part Number HP High-Definition LCD TV Service Manual...
  • Page 44 Picture Reference Picture of Replacement Part Number HP High-Definition LCD TV Service Manual...
  • Page 45 Picture Reference Picture of Replacement Part Number HP High-Definition LCD TV Service Manual...
  • Page 46 Picture Reference Picture of Replacement Part Number LT3200 LT3700 LT4200 LT4700 Note: 37”, 42”, 47” models will include two inverter boards. Only one inverter board is shown for each model. HP High-Definition LCD TV Service Manual...
  • Page 47 Picture Reference Picture of Replacement Part Number LT3200 LT3700 LT4200 LT4700 HP High-Definition LCD TV Service Manual...

  • Page 48: Removal And Replacement

    3 Verify that the screws, parts, and cables that are removed for servicing have all been returned to their proper locations per the original setup. 4 Check the software version. 5 Check whether or not the TV works properly from each source. Basic Adjustment Settings No extra adjustments settings are needed. HP High-Definition LCD TV Service Manual...

  • Page 49: Four Models - Comparison Pictures

    Four Models – Comparison Pictures This section provides pictures of each TV model with the rear cover removed. Use these images to familiarize yourself with each TV and its associated parts. LT3200 LT3700 HP High-Definition LCD TV Service Manual...

  • Page 50: Lt4200

    LT4200 LT4700 HP High-Definition LCD TV Service Manual...

  • Page 51: Removal Procedures

    All screws in the TV are all Philips head of differing sizes, lengths, and threads. As a general rule, screws that secure plastic components are self-tapping, while screws that secure metal components are machine screws. A repair screw kit (452128-001) containing a sampling of all screws is available. HP High-Definition LCD TV Service Manual...

  • Page 52: Removing The Pedestal

    2 Position the bottom of the TV near the edge of the table so the pedestal hangs off the edge of the table. 3 Remove the four screws. 4 Carefully lift the pedestal off the TV. HP High-Definition LCD TV Service Manual...

  • Page 53: Disassembling The Pedestal

    1 Position the pedestal so you can access the screws from the bottom of the pedestal. 2 Remove the four screws that hold the two pieces of the pedestal together. Note: Hole usage varies depending on model. Model LT3200/LT3700 shown 3 Separate the two pieces of the pedestal. HP High-Definition LCD TV Service Manual...

  • Page 54: Removing The Back Cover

    Note: All models except for the 32-inch have small bumps on the edge of the bezel that indicate the locations where the cover is connected to the bezel. Apply pressure at these locations to loosen the cover. Note: Removing the cover can be difficult and may take some time. HP High-Definition LCD TV Service Manual...

  • Page 55: Removing The Function Keyboard

    3 Carefully lift the back cover straight up off the unit. Removing the Function Keyboard Lift the function keyboard from the slot and detach the cable from the connector. HP High-Definition LCD TV Service Manual...

  • Page 56: Removing The Infrared Board

    Removing the Infrared Board 1 Remove the one screw securing the infrared board. 2 Lift the infrared board and detach the cable from the connector. HP High-Definition LCD TV Service Manual...

  • Page 57: Removing The Wall Mount Brackets

    Note: On 32-inch models, to replace the IR board, plug the cable into the connector on the IR board before you replace the screws. Removing the Wall Mount Brackets Remove the four screws and lift the wall mount brackets away from the board cover. HP High-Definition LCD TV Service Manual...

  • Page 58: Removing The Board Cover

    It is not necessary to remove the power supply to remove the main board. Only the main board and cable are spared; therefore, after removing the assembly from the unit, you must remove the two brackets from the board, and replace them on the new board. HP High-Definition LCD TV Service Manual...
  • Page 59 1 Detach all the cables connected to the main board. You must remove one screw to remove the LVDS cable. Power jumper (above) HP High-Definition LCD TV Service Manual...
  • Page 60 Speaker IR cable (above) LVDS cable, requires screw removal (above) HP High-Definition LCD TV Service Manual...
  • Page 61 2 Remove the six screws from the I/O bracket. 3 Remove the five screws securing the main board to the main bracket. HP High-Definition LCD TV Service Manual...

  • Page 62: Removing The Power Supply

    When replacing the main board/bracket assembly, install the system board bracket below the rails in the TV. Removing the Power Supply LT3200 and LT3700 models use the same power supply. LT4200 and LT4700 models use the same power supply, but differ from the LT3x00 models.
  • Page 63 Use the following image to note of the wiring when replacing the cables to their respective connectors. The image is representative of all four models except for the 32-inch model, which has only one inverter. 1 Detach all the cables connected to the power supply Inverter cables (above) HP High-Definition LCD TV Service Manual...
  • Page 64 Inverter cables (above) The Master inverter cable connector is closer to the outside of the board. Inverter cable (above) Power supply to main board connector cable (above) HP High-Definition LCD TV Service Manual...
  • Page 65 2 Remove the four screws securing the power supply to the main bracket. 3 Remove the power supply. HP High-Definition LCD TV Service Manual...

  • Page 66: Removing The Main Bracket

    1 Remove the ten screws from the main bracket. 2 Remove the main bracket from the LCD panel Note: When replacing the main bracket on the 32-inch model, place the bottom of the bracket about 1/2-inch above the bottom of the speakers. HP High-Definition LCD TV Service Manual...

  • Page 67: Removing The Inverters

    Note: Inverter board cabling differs based on model. LT 3200 Inverter Removal Note: Model LT3200 has only one inverter. 1 Remove the six screws that secure the inverter cover to the unit, and then lift the cover up and out of the unit.
  • Page 68 Note: To disconnect the cables, grasp both sides of the cable near the connector, and then pull the cable straight out of the connector. Master inverter (above) Slave inverter 3 Lift the inverter board up and off the unit. HP High-Definition LCD TV Service Manual...
  • Page 69 2 Disconnect the 10 cables from the connectors on the rear of the inverter board, and the remaining cables from the connectors on each side of the board. Note: Grasp both sides of the cable connector and pull it straight from the connector on the board. 3 Lift the inverter board up and off the unit. HP High-Definition LCD TV Service Manual...

  • Page 70: Removing The Speakers

    To remove the speakers without removing the power supply or main board, remove the screws that secure the main bracket, lift the bracket up to gain access to the speaker cable, and then disconnect and remove the cable. Note: The left and right speakers are not the same. HP High-Definition LCD TV Service Manual...
  • Page 71 1 Release the speaker cables from the latches. 2 Remove the two screws from each speaker. Note: For the 47-inch model, remove the wires from the clip holders. HP High-Definition LCD TV Service Manual...

  • Page 72: Removing The Control Board

    2 Remove the five screws that secure the control board cover to the unit. 3 Lift the cover from the unit. Note: You cannot remove the ZIF cables from the side of the unit on the 32-inch and 37-inch models. 4 Lift the board from the unit. HP High-Definition LCD TV Service Manual...
  • Page 73 Note: When replacing the cover, place the lip on the back of the cover into the slot on the main bracket, and then rotate the cover down into place. Note: On the 37-inch model, when replacing the cover, put the cover over the board before reconnecting the screws. HP High-Definition LCD TV Service Manual...
  • Page 74 4 Disconnect the four flat ribbon cables from the ZIF connectors at the top of the control board by flipping up the dark part of the connector and sliding the cable out of the socket. 42-inch model shown HP High-Definition LCD TV Service Manual...
  • Page 75 Note: To replace the board on the 47-inch model, replace one screw into the middle hole toward the top of the board, reconnect the flat ribbon cables, and then replace the remaining screws. HP High-Definition LCD TV Service Manual...

  • Page 76: Removing The Front Bezel

    6 Unlatch the plastic tabs that secure the bezel to the unit. 7 Remove the bezel from the unit. To replace the bezel, place the bezel on a large flat surface, and then place the panel straight down into the bezel. HP High-Definition LCD TV Service Manual...

  • Page 77: Diagnostics

    2 Plug in the power cord while holding the power button on the TV (not on the remote). Hold the power button until a testing message appears. This may take up to 30 seconds. 3 Diagnostic test begins. HP High-Definition LCD TV Service Manual...

  • Page 78: How To Get Back To Normal Tv Operation After Running Diagnostics

    These menus are not available to all users and are to be used only by trained service professionals or custom installers. These instructions are provided as is and HP is not responsible for any damage to the TV due to improper use of these menus.

  • Page 79: Hotel Mode

    Select to exit from the Installation OSD menu. Exit Hotel mode Hotel mode allows hotels to not allow their guests to change TV configurations. This mode blocks some remote buttons and TV functionality, including the MENU and FAV buttons HP High-Definition LCD TV Service Manual...

  • Page 80: How To Enable And Disable

    To return to normal mode from Hotel mode: 1 On the remote, press the Menu button. 2 From the OSD, select Setup -> Time. 3 Change input source to AV2, and then press SOURCE -> 1 -> 3 -> 5. HP High-Definition LCD TV Service Manual...

  • Page 81: Troubleshooting

    Replace battery Change battery Replace remote Try another remote control Check IR receiver Change LED & IR board Replace LED & IR Change LED cable & IR cable Replace main board HP High-Definition LCD TV Service Manual...

  • Page 82: Function Key

    Function Key The buttons do not work Replace tact switch Check switches Replace key board Check key board Check the key board cable Change the key board cable Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 83: Power: Tv Does Not Turn On

    Power: TV Does Not Turn On HP High-Definition LCD TV Service Manual...

  • Page 84: Audio

    Audio No sound Reconnect Check the connecter Replace the speaker Check the speaker wire wire Replace the speaker Check the speaker set Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 85: Vga Input

    VGA Input No picture on the screen Check PC Check if PC is working Check VGA connect Replace VGA cable Check VGA cable Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 86: Hdmi Input

    HDMI Input No picture on the screen Check if HDMI Check HDMI source works source Reconnect Check HDMI connection Replace HDMI Check cable HDMI cable Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 87: Dvi Input

    Check if PC is Check PC working Reconnect Check DVI connection Check DVI-to- Replace adapter HDMI adapter Replace the HDMI Check the cable HDMI cable Replace the DVI Check the cable DVI cable Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 88: Ypbpr Input

    YPbPr Input No picture on the screen Check the Check the Source Source; is it device working? Reconnect Check connect Check wires Replace wires (green, blue, red) Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 89: Tv/Video/S-Video Input

    No picture on the screen Check if the Source Check signal source is working Reconnect Check connect Check cable Replace cable Check tuner Replace tuner & & audio audio board board Replace the main board HP High-Definition LCD TV Service Manual...

  • Page 90: Troubleshooting Tips

    Flicker/Image too dark – Check main board or inverter board, load default settings. • Gray value display – Check main board or panel cable, load default settings. • VGA no image – Check main board or D-sub cable: is NB switch to LCD monitor? HP High-Definition LCD TV Service Manual...

  • Page 91: Led Display Abnormal

    LVDS cable Main board to LVDS cable to LCD panel connection Problem: Line/display noise Action: Change LVDS FPC cable or main board Screen LCD panel Problem: • Mura (cloudiness) • Crack Action: Change LCD panel HP High-Definition LCD TV Service Manual...

  • Page 92: Example Of Defective Lcds

    The pictures below are some of the example of what a defective LCD looks like and how to solve the problem: Problem: LCD crack Solution: Change LCD panel Problem: Scrape on the LCD panel (1) Solution: Change LCD panel HP High-Definition LCD TV Service Manual...
  • Page 93 Problem: Scrape on the LCD panel (2) Solution: Change LCD panel or change Polarizer Problem: Mura (cloudiness) Solution: Change LCD panel HP High-Definition LCD TV Service Manual...
  • Page 94 Problem: Line Solution: Change LCD panel HP High-Definition LCD TV Service Manual...

  • Page 95: Chassis Layout And Overall Wiring Diagrams

    Chassis Layout and Overall Wiring Diagrams Boards Layout (Typical of all models except 32-inch*) * The 32-inch model has only one inverter. Description Main board Keypad board IR board Speaker left Speaker right Power supply unit board AC socket HP High-Definition LCD TV Service Manual...

  • Page 96: Connectors

    Power supply from power converter board CN114 CN15 28 pins/ROHS LVDS output signal (Between main board and panel) CN18 4 pins/ROHS Audio power CN12 11 pins/ROHS Keypad and IR control (connect to keypad board and IR board) HP High-Definition LCD TV Service Manual...

  • Page 97: Keypad And Ir Boards

    Keypad and IR Boards Keypad Board IR Board Connector Specification Description 9 pins/ROHS Keypad control signal from main board CN12 6 pins/ROHS IR signal and LED control from main board CN12 HP High-Definition LCD TV Service Manual...

  • Page 98: Wires And Cables Wiring

    Wires and Cables Wiring Main Board Specification Input and output signal Main board Vs, 5V, 12V Panel Main board XY signal Power supply Inverter board Speaker Main board Audio signal Keypad, IR Main board ADC signal HP High-Definition LCD TV Service Manual...

  • Page 99: Wiring Diagram

    Wiring Diagram HP High-Definition LCD TV Service Manual...

  • Page 100: Firmware Update Procedure

    Firmware Update Procedure Overview Firmware updates are available for download from the HP Web site. The updates consist of two files, as follows: • For the LT3200 and LT3700 — The update_LCD720.tgz and safe-kernel.img1 files • For the LT4200 and LT4700 — The update_LCD1080.tgz and safe-kernel.img1 files To transfer the firmware onto the TV, copy the update to a FAT32-formatted USB flash drive.

  • Page 101: Software Feature Requirement

    Only one update_xxx.tgz file from a software upgrade can be contained on a USB drive key. Even though there is only a single binary per resolution for LCDs and PDPs, service personnel should prepare multiple US drivers. HP High Definition LCD TV Service Manual 95...
  • Page 102 Part Number 454404-002...

This manual is also suitable for:

Lt4700Lt3700Lt4200

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