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HP LT3700 Service Manual

Lcd high-definition television.
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High-Definition LCD TV Service Manual
Models: LT3200, LT3700, LT4200, LT4700

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  • 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 ...

  • Page 4: Table Of Contents

    Diagnostics ... 70 LED Indicators ...70 Software version information...70 How to run diagnostics ...70 How to get back to normal TV operation after running diagnostics... 71 Installation menu ... 71 Hotel mode ...73 How to enable and disable ...73 Troubleshooting ... 74 Remote Control ...74...

  • Page 5: Table Of Contents

    Software Update Procedure ...94 Limitation of this Implementation ...94 Appendix A – LCD Panel Specifications ... 95 Chi Mei Optoelectronics Corporation:...95 AU Optronics Corporation LCD Panel Product Specifications ...95 L.G. Philips LCD Panel Product Specifications ...95 HP High-Definition LCD TV Service Manual...

  • Page 6: Important Service Safety Precautions, Warnings And Cautions

    Service technicians who use service procedures or tools that are not recommended by HP must exercise caution and be sure that neither their safety nor the safe operation of the equipment will be jeopardized by the service method selected.

  • Page 7: Safe Handling And Servicing

    Continuing to use the product may cause fire or electric shock. HP High-Definition LCD TV Service Manual • The LCD module uses a high-voltage (maximum 450V DC). Be cautious of electric shock and do not touch the device circuitry when handling the LCD unit.

  • Page 8: Repair Tips, About Lead-free Solder

    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 9: Suggested Pb-free Solder, Servicing Of Surface-mounted Devices (smds)

    HP High-Definition LCD TV Service Manual • Never rub or scrape chip components as this may cause the value of the component to change.

  • Page 10: Rework On Ball Grid Array (bga) Ics

    (LF) BGA with any board markers. To reflow the solder, apply a temperature profile according to the IC data sheet. To avoid damaging neighboring components, it may be necessary to reduce some temperatures and times. HP High-Definition LCD TV Service Manual...

  • Page 11: Product Information And Specifications, Product Information, Product Profile, Specifications, Lcd Panel Module

    (bench and in-home technicians) and 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.

  • Page 12: General Tv Specifications Lt3200 And Lt3700

    General TV Specifications LT3200 and LT3700 Model number Description Availability Brightness Resolution Contrast Ratio Viewing Angle Video Response Time Scalar Supported Input ATSC/NTSC/Clear -QAM Tuning Unidirectional Cable Card 3D Digital Comb Filter Video Noise Reduction 3:2 Pull Down HP Visual Fidelity Engine...

  • Page 13

    Weight (with stand) Weight (without stand) VESA wall mount standard Energy Star Front Bezel Trademarks Regulatory Safety compliance HP High-Definition LCD TV Service Manual LT3200 LT3700 English/French/Spanish English/French/Spanish No TV Guide No TV Guide 40%-60% Gloss Midnight Black, 40%-60% Gloss Midnight Black,...

  • Page 14: General Tv Specifications Lt4200 And Lt4700

    176 degrees 8 ms Trident LX66 480i, 480p, 720p, 1080i, 1080p (HDMI only) 2 x 10W, 1 way Theater, Music Hall HP High-Definition LCD TV Service Manual LT4700 47” HDTV June 2007 500 cd/m2 1920 x 1080 1200:1 176 degrees 6.5 ms...

  • Page 15

    Weight (with stand) Weight (without stand) VESA wall mount standard Energy Star Front Bezel Trademarks Regulatory Safety compliance HP High-Definition LCD TV Service Manual LT4200 LT4700 English/French/Spanish English/French/Spanish No TV Guide No TV Guide 40%-60% Gloss Midnight Black, 40%-60% Gloss Midnight Black,...

  • Page 16: I/o Connectors, Factory Preset Display Modes

    30.000 Vertical Pixel Clk polarity (MHz) 25.175 – 31.500 – 28.322 40.000 49.500 65.000 – 75.000 – 78.750 – 68.250 – 108.000 85.500 74.250 HP High-Definition LCD TV Service Manual Source VESA VESA VESA VESA VESA VESA VESA VESA VESA...

  • Page 17: Controlling The Onscreen Display, Tv Indicators And Controls

    Controlling the Onscreen Display The onscreen display (OSD) is controlled by using the remote control or the bezel buttons on the left side of the TV. The TV indicators (A and B) are located on the front of the TV.

  • Page 18: Remote Control

    (IR protocol: RC6) Remote control Remote control button label Remote control function Power Use to turn power on or place TV into standby mode. SAP/MTS Turn secondary audio program on and off. Sound Select audio mode: Voice, Music, Standard, User.

  • Page 19: 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 20

    HP High-Definition LCD TV Service Manual...

  • Page 21

    HP High-Definition LCD TV Service Manual...

  • Page 22: 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 23

    • The white port labeled L connects to the left audio channel. These connectors support 480i, 480p, 720p, and 1080i analog standard and high-definition format inputs. The TV automatically determines what format is being used by the currently connected device.

  • Page 24

    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 25: Basic Operation, Osd (on-screen Display) Functions – Simplemenu

    Basic Operation For more information about using your HP LCD TV, refer to the There are two menus available – a customer-based menu (Simplemenu) and an advanced menu (Fullmenu). Simplemenu is the default setting. Default selections are shown in bold.

  • Page 26: Osd Functions – Fullmenu

    To access Fullmenu, select SETUP > Caption. Note that Caption Menu is only valid when current input selection is either TV, AV1/S-Video, or Component. Otherwise, caption menu will be disabled. Press the following remote keys: MTS > 7 > 0 > 4. To return to Simplemenu, select Simplemenu from Fullmenu.

  • Page 27

    Channel List Signal Strength Parental Change Password Lock Enable MPAA US TV Rating Canadian English Canadian French Setup Time HP High-Definition LCD TV Service Manual Cable PG-13 NC-17 Not Rated FV, V, S, L, D TV-Y TV-Y7 TV-G TV-PG TV-14...

  • Page 28

    Text3 Text4 Service Digital Service1 Service2 Service3 Service4 Service5 Service6 Style Font Size Font Style Foreground Color Background Color HP High-Definition LCD TV Service Manual Active for "Auto". Default Small Standard Large Default Style0 Style1 Style2 Style3 Style4 Style5 Style6...

  • Page 29

    Setup (cont) Caption (cont) OSD Language Setup Wizard Input Labels Default Settings SimpleMenu™ HP High-Definition LCD TV Service Manual Style (cont) Background Color (cont) Foreground Opacity Background Opacity Edge Style English Spanish French [ Start ] Default Component 1 Component 2...

  • Page 30: Command Table Rs232

    CR (Carriage Return) at the end of string “OK” + CR: success “ERR” + CR: fail 20 Remote Commands Over RS232c Port Set the RS-232c communications settings on the PC to match the TV’s communication conditions. The TV’s communications settings are as follows: Baud rate 9600 bps...

  • Page 31

    Channel Direct Channel (Analog) Direct Channel (Digital) CH Up CH Down HP High-Definition LCD TV Service Manual Parameter Control Contents PC mode (0–100) PC mode (0–100) ONLY PC mode (0–100) ONLY PC mode (0–100) Auto mode 16:9 mode 4:3 mode...

  • Page 32

    Auto Search. This command does not change RF input or channel map tables between air and cable. This command has NO correlation with Ant button on remote. Digital air channel: 2~69 Cable channel: 2~135 HP High-Definition LCD TV Service Manual...

  • Page 33

    Time Zone Set auto on mode Set auto on time Set auto off mode Set auto off time Select analog CC service HP High-Definition LCD TV Service Manual Parameter Control Contents Auto Manual Year, if time mode is manual...

  • Page 34

    RETAIN SETTINGS SET (ON) RESET (OFF) INPUT SOURCE KEYBOARD LOCK ENABLE HP High-Definition LCD TV Service Manual Helps to erase remnants of long time still image on LCD screen. 0-7, selects number of hours of no activity before auto SHUT_OFF is activated.

  • Page 35

    Control Item Command REMOTE CON MODE START CHANNEL CHANNEL LOCK START VOLUME MIN VOLUME MAX VOLUME MUTE DISABLE HP High-Definition LCD TV Service Manual Parameter Control Contents REMOTE ACTIVE SELECT (Analog Channel) SELECT (Digital, MAJOR Channel) SELECT (Digital, MINOR Channel)

  • Page 36: Return Messages, Special Command Extension

    Return messages For every command, TV should return reply. Controller waits before sending another command because some commands take time before TV is ready to accept next command. For example, the “channel scan” command takes minutes. For Normal Response CR : Carriage Return (0Dh)

  • Page 37: Replaceable Parts, Parts List By Model, Model Lt3200

    Inverter cable Control board Control board LVDS cable Power cord Remote control Cable clamp Repair screw kit VGA cord Whole unit – head only HP High-Definition LCD TV Service Manual Replaceable Parts 60.3YI02.001 42.3YI02.001 6K.3YISC.003 56.04230.Q01 50.3YJ02.001 91.3YW10.001G 50.3YJ02.001 60.3YI07.001 60.3YJ03.001...

  • Page 38: Model Lt3700

    455601-001 6871L-1083A 50.3YG02.001 6851L-0071E 8121-0740 5188-6301 / 90.3YI26.001 452113-001 38.05031.001 452127-001 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) 453143-001 451705-001 HP High-Definition LCD TV Service Manual...

  • Page 39: Model Lt4200

    LVDS cable Ribbon cables – qty 4 Power cord Remote control Cable clamp Repair screw kit VGA cord Whole unit – head only HP High-Definition LCD TV Service Manual OEM Part Number HP Part Number 60.3YJ17.001 452086-001 455589-001 42.3YJ06.001 6K.3YISC.003 455592-001 56.04338.R01...

  • Page 40: Model Lt4700

    455603-001 35-D013131 50.3YK01.001 32-D007123 8121-0740 5188-6301 / 90.3YI26.001 452113-001 38.05031.001 452127-001 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) 453143-001 451707-001 HP High-Definition LCD TV Service Manual...

  • Page 41: 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 42

    Picture Reference Picture of Replacement Part Number HP High-Definition LCD TV Service Manual...

  • Page 43

    Picture Reference Picture of Replacement Part Number HP High-Definition LCD TV Service Manual...

  • Page 44

    Picture Reference Picture of Replacement Part Number Note: 37”, 42”, 47” models will include two inverter boards. Only one inverter board is shown for each model. LT3200 LT3700 LT4200 LT4700 HP High-Definition LCD TV Service Manual...

  • Page 45

    Picture Reference Picture of Replacement Part Number HP High-Definition LCD TV Service Manual LT3200 LT4200 LT3700 LT4700...

  • Page 46: Removal And Replacement, Equipment And Tools Needed For Removal And Replacement, Tools, After Service Checklist

    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.

  • Page 47: Four Models – Comparison Pictures, Lt3200, Lt3700

    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 48: Lt4200, Lt4700

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

  • Page 49: Removal Procedures, Removal Order, Screws

    • Speakers Screws 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.

  • Page 50: Removing The Pedestal

    1 Carefully place the TV with the glass screen facing downward on a padded, stable table. 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.

  • Page 51: 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. 3 Separate the two pieces of the pedestal. HP High-Definition LCD TV Service Manual Model LT3200/LT3700 shown...

  • Page 52: 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 53: 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 54: 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 55: 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 56: Removing The Board Cover, Removing The Main Board

    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 57

    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 58

    Speaker IR cable (above) LVDS cable, requires screw removal (above) HP High-Definition LCD TV Service Manual...

  • Page 59

    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 60: 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 61

    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 62

    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 63

    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 64: 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 65: Removing The Inverters

    Removing the Inverters When replacing inverters, first replace the board(s), and then test the unit. If the TV still does not work, replace the inverter cable(s). Inverters are spared as a pair (except for the 32-inch model), so you should replace both. The inverters are NOT the same –...

  • Page 66

    Note: To disconnect the cables, grasp both sides of the cable near the connector, and then pull the cable straight out of the connector. 3 Lift the inverter board up and off the unit. Master inverter (above) Slave inverter HP High-Definition LCD TV Service Manual...

  • Page 67

    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 68: 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 69

    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 70: 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. HP High-Definition LCD TV Service Manual...

  • Page 71

    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 72

    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 42-inch model shown HP High-Definition LCD TV Service Manual...

  • Page 73

    5 Remove the flat ribbon cables from the connectors on the main TV chassis. 6 Lift the board from the unit. Note: When replacing the control board 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.

  • Page 74: Removing The Front Bezel

    3 Remove the IR/keypad assembly. 4 Remove the speakers. 5 Replace the stand and set the TV upright on the stand. 6 Unlatch the plastic tabs that secure the bezel to the unit. 7 Remove the bezel from the unit.

  • Page 75: Diagnostics, Led Indicators, Software Version Information, How To Run Diagnostics

    1 Power off the TV and pull disconnect the power cord. 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.

  • Page 76: How To Get Back To Normal Tv Operation After Running Diagnostics, Installation Menu

    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 77

    Note: This input needs to be remapped back to HDMI audio if the source can provide both video and audio over HDMI. In certain applications, such as hotels, the TV provider may not want to allow users (guests) to change the TV settings. In Hotel Mode, the Menu and Fav (Channel Favorites) keys on the remote are disabled.

  • Page 78: Hotel Mode, How To Enable And Disable

    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 How to enable and disable TVs are delivered to hotels in normal mode.

  • Page 79: Troubleshooting, Remote Control

    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 Troubleshooting...

  • Page 80

    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 81: Power: Tv Does Not Turn On

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

  • Page 82

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

  • Page 83

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

  • Page 84: Hdmi Input

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

  • Page 85: Dvi Input

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

  • Page 86

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

  • Page 87: Audio

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

  • Page 88: No Power, No Video, Keypad Abnormal, Led Display Abnormal, Abnormal Display

    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 89: Troubleshooting Tips, Led Display Abnormal, Lcd Panel Troubleshooting Tips, Inverter Board, Control Board (panel Driver)

    Screen LCD panel Problem: Mura (cloudiness) • Crack • Action: Change LCD panel HP High-Definition LCD TV Service Manual Blink Frequency Failure Part 1 sec interval MCU-Host link error 1 sec interval TAFE does not respond 1 sec interval Tuner does not respond...

  • Page 90: 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 91

    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 92

    Problem: Line Solution: Change LCD panel HP High-Definition LCD TV Service Manual...

  • Page 93: Chassis Layout And Overall Wiring Diagrams, Boards Layout (typical Of All Models Except 32-inch*)

    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 94: Main Board, Connectors

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

  • Page 95: Keypad And Ir Boards

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

  • Page 96: Wires And Cables Wiring, Main Board

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

  • Page 97: Wiring Diagram

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

  • Page 98: Firmware Update Procedure, Overview, Safe Software Update Procedure, Introduction

    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 99: Software Feature Requirement, Software Update Procedure, Limitation Of This Implementation

    2 safe_kerenl.img1 uncompresses update_xxx.tgz, and then reads product IDs from it. Product IDs are as follows: a. LCD720: all 720P LCD TVs b. LCD 1080: all 1080P LCD TVs 3 Assume all TV boards are loaded and initially tested by the ODM and product IDs are embedded into a flash memory block. Software Update Procedure 1 Load Safe Kernel from a USB drive key.

  • Page 100: Appendix A – Lcd Panel Specifications, Chi Mei Optoelectronics Corporation

    AU Optronics Corporation LCD Panel Product Specifications • Model: T315XW02 http://www.auo.com/auoDEV/products.php?sec=lcdTV&func=info&product_id=96&items_id=8 • Model: T370XW02 http://www.auo.com/auoDEV/products.php?sec=lcdTV&func=info&product_id=100&items_id=8 • Model: T420XW01: http://www.auo.com/auoDEV/products.php?sec=lcdTV&func=info&product_id=117&items_id=8 • Model: T420HW01: http://www.auo.com/auoDEV/products.php?sec=lcdTV&func=info&product_id=101&items_id=8 L.G. Philips LCD Panel Product Specifications • Model: LC370WX1 http://www.lgphilips-lcd.com/homeContain/jsp/eng/prd/prd101_j_e.jsp HP High Definition LCD TV Service Manual...

  • Page 101

    Part Number 454404-001...

This manual also for:

Lt3200, Lt4200, Lt4700

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