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HP High-Definition LCD TV Service Manual

Troubleshooting Tips

No Power

•

Check the power supply unit (PSU) – Is the PSU board defective?

•

Is the power cord connector grounded?

•

Check the cable between the PSU board and the main board.

•

Is the keypad/remote control power button working?

•

Is the power connector connected?

No Video

•

Is there an input source connected?

•

Is the LED on?

Check the main board and panel cable connection.

Is the power on?

Is there battery in the remote control?

Keypad abnormal

•

Is the button working properly?

•

Check whether the LED is on.

•

Check module.

•

Check the cable and main board connection.

LED Display abnormal

•

If the LED is off/dark/abnormal – check main board or cable.

•

If the LED flickers – Power saving mode in VGA: push any key to restart.

Abnormal Display

•

Missing Line:

Check the cable between the main board and the control board

Check the panel board

•

Bright Dot/Dark Dot/Light Leakage/Mura (cloudiness)/Image Sticking/Brightness spot/Particles/Dot Defect – Check
panel

•

No Display – Check the main board, inverter board, and panel board.

•

Display Noise:

Check the cable between the main board and the control board.

Check the panel board.

•

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?

Summary of Contents for LT3200

Page 1: ...High Definition LCD TV Service Manual Models LT3200 LT3700 LT4200 LT4700 ...

Page 2: ...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 This document contains proprietary information that is protected by copyright No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Hewlett ...

Page 3: ... 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 12 Remote Control 13 TV Connectors 14 Connectors 17 Basic Operation 20 Basic Operation 20 OSD On Screen Display Functions Simplemenu 20 OSD Functions Fullmenu 21 Command Tab...

Page 4: ...r 52 Removing the Main Board 52 Removing the Power Supply 56 Removing the Main Bracket 60 Removing the Inverters 61 Removing the Speakers 64 Removing the Control Board 66 Removing the Front Bezel 70 Diagnostics 71 LED Indicators 71 Software version information 71 How to run diagnostics 71 How to get back to normal TV operation after running diagnostics 72 Installation menu 72 Hotel mode 73 How to ...

Page 5: ...n 85 Example of defective LCDs 86 Chassis Layout and Overall Wiring Diagrams 89 Boards Layout Typical of all models except 32 inch 89 Connectors 90 Main Board 90 Keypad and IR Boards 91 Wires and Cables Wiring 92 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 Lim...

Page 6: ...vi HP High Definition LCD TV Service Manual ...

Page 7: ... WARNING Use of substitute replacement parts which do not have the same specified safety characteristics may create shock fire or other hazards Under no circumstances should the original design be modified or altered without written permission from HP HP assumes no liability express or implied arising out of any unauthorized modification of design The service technician assumes all liability CAUTI...

Page 8: ...ot touch the device circuitry when handling the LCD unit Because the capacitor of the device circuitry may remain charged at the moment of power off standing by for 1 minute is strongly recommended before touching the device circuitry Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart ap...

Page 9: ...me potential as the mass of the unit via a wrist wrap with resistance Keep components and tools also at the same potential About Lead Free Solder NOTE LEAD IS LISTED AS PB IN THE PERIODIC TABLE OF THE ELEMENTS IN THE INFORMATION THAT FOLLOWS PB WILL REFER TO LEAD SOLDER AND PBF WILL REFER TO LEAD FREE SOLDER THE LEAD FREE SOLDER USED IN OUR MANUFACTURING PROCESS AND DISCUSSED HERE IS SN AG CU THAT...

Page 10: ... The capacitance or resistance value of the SMDs may be affected by these conditions Rough handling of circuit boards containing SMDs may cause damage to the components as well as the circuit boards Circuit boards containing SMDs should never be bent or flexed Different circuit board materials expand and contract at different rates when heated or cooled and the components and or solder connections...

Page 11: ...t are deformed drastically so the removed LF BGA has to be discarded Device removal As is the case with any component that it is essential when removing an LF BGA the board tracks solder lands or surrounding components are not damaged To remove an LF BGA the board must be uniformly heated to a temperature close to the reflow soldering temperature A uniform temperature reduces the chance of warping...

Page 12: ...dels 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 Specifications LCD Panel Module Model name LT3200 32 Model LT3700 37 Model LT4200 42 Model LT4700 47 Model Number of pixels 1366 H x 768 V 1366 H x 76...

Page 13: ...TSC Clear QAM 1 1 Tuning Unidirectional Cable Card No No Video enhancers 3D Digital Comb Filter Video Noise Reduction 3 2 Pull Down HP Visual Fidelity Engine Photorealistic Sharpness Enhancement 3D Color Enrichment Motion Adaptive Deinterlacer Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Speakers 2 x 10W 1 way 2 x 10W 1 way Dolby Digital Out Yes Yes Virtual Surround Sound Theater Music ...

Page 14: ... Integrated Integrated Remote Standard Philips 35 button Standard Philips 35 button Wall mounts Optional recommended Optional recommended Accessories Media Center DEC Optional recommended Optional recommended Power supply 120V AC 60Hz 120V AC 60Hz Power consumption W 180W 220W Dimensions with stand H W D inches centimeter 24 0 60 7 x 30 9 78 5 x 9 4 23 9 26 7 67 8 x 35 7 90 7 x 11 0 27 9 Dimension...

Page 15: ...ATSC NTSC Clear QAM 1 1 Tuning Unidirectional Cable Card No No Video enhancers 3D Digital Comb Filter Video Noise Reduction 3 2 Pull down HP Visual Fidelity Engine Photorealistic Sharpness Enhancement 3D Color Enrichment Motion adaptive Deinterlacer Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Speakers 2 x 10W 1 way 2 x 10W 1 way Dolby Digital Out Yes Yes Virtual Surround Sound Theater ...

Page 16: ...rated Remote Standard Philips 35 button Standard Philips 35 button Wall mounts Optional recommended Optional recommended Accessories Media Center DEC Optional recommended Optional recommended Power supply 120V AC 60Hz 120V AC 60Hz Power consumption W 300W 330W Dimensions with stand H W D inches centimeter 28 5 72 4 x 40 0 101 6 x 11 0 27 9 31 7 80 5 x 44 4 112 8 x 11 0 27 9 Dimensions without stan...

Page 17: ...nput Commercial use only Standard Definition Input AV Input 1 S Vid Video and Audio L and R AV Input 2 S Vid Video and Audio L and R Service Port USB For firmware upgrade use Factory Preset Display Modes Preset Pixel format Horizontal frequency kHz Horizontal polarity Vertical frequency Hz Vertical polarity Pixel Clk MHz Source 1 640 x 480 31 469 59 940 25 175 VGA 2 640 x 480 37 500 75 000 31 500 ...

Page 18: ...D menu selects the highlighted item in the OSD SOURCE Source SRC selects the input Menu In an OSD menu this functions as a back button or moves you up one item or menu level CH CH Channel CH selects the next or previous channel In an OSD menu press these buttons to move up or down in the menu VOL VOL Volume VOL raises or lowers the sound level In an OSD menu press these buttons to move right or le...

Page 19: ...t menu option Aspect Change the image aspect ratio Back Go up one menu level when the OSD is displayed Info Display channel information about your current TV program Volume Turn volume up and down Last Go back to the previous channel Mute Turn the sound on and off Ch Ch Move the channels up and down CC Display the closed caption content Sleep Display the sleep timer 15 30 60 90 120 minutes Fav Sho...

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 15 ...

Page 22: ...16 HP High Definition LCD TV Service Manual ...

Page 23: ...ng to composite or S Video connections The white port is for the left channel and the red port is for the right channel The black ports labeled S Vid connect S Video which transmits video in separate color and black and white image signals and delivers a sharper image than a composite video connection Component Video Ports Component video provides the highest video quality currently available Comp...

Page 24: ...led Pr connects to the cable carrying the Pr signal The red port labeled R connects to the right audio channel 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 HDMI Connectors High Definition Multi...

Page 25: ...ts separate HDMI audio This configuration requires a DVI to HDMI converter that connects a DVI cable from optional DVI equipment and connects to the HDMI audio in ports using a pair of stereo audio connectors The white port is for the left channel and the red port is for the right channel RS 232 Port The RS 232 connector works like a serial port on a PC and is also sometimes called a serial port I...

Page 26: ...Default selections are shown in bold OSD On Screen Display Functions Simplemenu TV OSD Menu Structure Simplemenu Main Sub1 Sub2 Options Picture Mode Vibrant Standard Studio User Brightness Contrast Saturation Hue Sharpness Color Temp Cool Standard Warm Aspect Ratio Auto 16 9 Mode 4 3 Mode Zoom1 Zoom2 Panorama PC Auto Sync Audio Mode Voice Standard Music User Auto Volume On Off Virtual Surround Off...

Page 27: ...OSD Menu Structure Fullmenu Main Sub1 Sub2 Options Sub3 Options Options Picture Mode Vibrant Standard Studio User Brightness Contrast Saturation Hue Sharpness Color Temp Cool Standard Warm Aspect Ratio Auto 16 9 Mode 4 3 Mode Zoom1 Zoom2 Panorama PC H Position V Position H Size V Size Phase Adjust Clock Adjust Auto Sync Default Audio Mode Voice Standard Music User Treble User mode only Bass User m...

Page 28: ...rental Change Password Lock Enable On Off MPAA G PG PG 13 R NC 17 X Not Rated US TV Rating FV V S L D TV Y TV Y7 TV G TV PG TV 14 TV MA Canadian English E C C8 G PG 14 18 Canadian French E G 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 NST AST EST CST MST PST AKST HST ...

Page 29: ...Off On Mute Service Analog CC1 CC2 CC3 CC4 Text1 Text2 Text3 Text4 Service Digital Service1 Service2 Service3 Service4 Service5 Service6 Style Font Size Default Small Standard Large Font Style Default Style0 Style1 Style2 Style3 Style4 Style5 Style6 Style7 Foreground Color Default White Black Red Green Blue Yellow Magenta Cyan Background Color Default White Black Red Green ...

Page 30: ...nsparent Flashing Background Opacity Default Solid Translucent Transparent Flashing Edge Style Default Edge Style0 Edge Style1 Edge Style2 Edge Style3 Edge Style4 Edge Style5 OSD Language English Spanish French Setup Wizard Start Input Labels AV1 AV2 Component 1 Component 2 HDMI 1 HDMI 2 HDMI 3 VGA Default AVR DVD PVR CABLE DEC AUX SAT VCR Default Settings Reset SimpleMenu ...

Page 31: ...urn at the end of string OK CR success ERR CR failure The command is terminated by a Carriage Return CR Don t send multiple commands at the same time Wait until you receive an OK response before you send the next command Make sure parameter values are entered left aligned and that you fill with blanks the remaining values In the following RS 232 Command Table _ indicates space indicates a valid va...

Page 32: ...e 0 100 H Position H P O _ PC mode 0 100 V Position V P O _ PC mode 0 100 H Size H S Z _ PC mode only 0 100 V Size V S Z _ PC mode only 0 100 Clock C L K _ PC mode only 0 100 VGA Phase P H S _ PC mode only 0 100 0 _ _ _ Auto mode 1 _ _ _ 16 9 mode 2 _ _ _ 4 3 mode 3 _ _ _ Zoom1 mode 4 _ _ _ Zoom2 mode Aspect A S P 5 _ _ _ Panorama mode 0 _ _ _ Mute On Mute M U T 1 _ _ _ Mute Off 0 _ _ _ PCM Dolby ...

Page 33: ...hannel CH Down C D W 0 _ _ _ The channel number of TV 1 If not TV display it will input switch to TV same function as CH Down 0 _ _ _ CC Off 1 _ _ _ CC On CC operation C C O 2 _ _ _ CC Mute Toggle CC on while audio muted Brightness B R T _ Brightness 0 100 Contrast C T R _ Contrast 0 100 Color C L R _ Color 0 100 Hue H U E _ Hue 0 100 Sharpness S R P _ Sharpness 0 100 0 _ _ _ Warm 1 _ _ _ Standard...

Page 34: ... analog channel K A C _ Skip a certain valid analog channel Channel skip Skip digital channel Major K D J _ Skip a certain valid digital channel major Combined with KDN command Skip digital channel Minor K D N _ Skip a certain valid digital channel minor Combined with KDJ command Reset to default R D F 0 _ _ _ Reset all settings to default 0 _ _ _ Auto Set time mode T M M 1 _ _ _ Manual Set time y...

Page 35: ...log CC service A C C 7 _ _ _ T4 Select digital CC service D C C 1 _ _ _ Select a certain service 1 2 _ _ _ Service 2 3 _ _ _ Service 3 4 _ _ _ Service 4 5 _ _ _ Service 5 6 _ _ _ Service 6 Select OSD language L A G 0 _ _ _ English 1 _ _ _ French 2 _ _ _ Spanish All screen white mode PDP only S R W 1 _ _ _ Displayed for 3 minutes to help reduce the appearance of after image on the screen 0 _ _ _ Li...

Page 36: ... OFF 0 TV starting with Previous input on Power On Default SOURCE AT P ON S O N _ _ _ INPUT SOURCE TV input source at PWR on 0 TV Cable or AIR Default 1 AV1 2 AV2 3 YPbPr1 4 YPbPr2 5 VGA 6 HDMI1 7 HDMI2 8 HDMI3 Pair with STR_AUX_SOURCE command SAS EN NOISE MUTE E N M _ _ _ AUDIO MUTE 1 Audio muted if no signal is present 0 Audio is NOT muted Same as current implementation Default KEY LOCK K L K _ ...

Page 37: ...emote START VOLUME S T V _ SELECT 0 100 Select volume level on TV turn on 255 Retain last volume setting Default This command sets initial volume level on PWR ON regardless of previous volume level MIN VOLUME M N V _ SELECT 0 100 Select MIN allowance volume setting 0 Default MNV setting must be less than MXV MAX VOLUME M X V _ SELECT 0 100 Select MAX allowance volume setting 100 Default MNV settin...

Page 38: ...099 Ch 9 0009 in ASCII 4 CH minor 0 9999 e g Ch 99 0099 Ch 9 0009 in ASCII 5 Caption 0 Off 1 On 6 Input source 0 8 TV Air Cable AV1 AV2 YPbPr1 YPbPr2 VGA HDMI1 HDMI2 HDMI3 7 Aspect 0 Auto 1 16 9 2 4 3 3 Zoom1 4 Zoom2 5 Panorama 8 Brightness 0 100 e g 7 0007 77 0077 in ASCII 9 Contrast 0 100 e g 7 0007 77 0077 in ASCII A Sharpness 0 100 e g 7 0007 77 0077 in ASCII B Color 0 100 e g 7 0007 77 0077 i...

Page 39: ...ons Keypad PCA board Infrared board System board to keypad IR cable 60 3YJ03 001 91 3YK10 003G 91 3YK10 002G 50 3YJ03 001 455604 001 7 Internal support wall mount 33 3YI06 001 452097 001 8 Mesh bracket board cover 34 3YI01 001 452098 001 9 Speakers L and R and wire connectors 23 40276 001 452108 001 10 Front bezel including speaker cover 60 3YI01 001 452114 001 11 I O bracket with AC inlet 90 3YI2...

Page 40: ...1 7 Internal support wall mount 33 3YI06 001 452097 001 8 Mesh bracket board cover 34 3YI01 001 452098 001 9 Speakers L and R and wire connectors 23 40276 001 452108 001 10 Front bezel including speaker cover 60 3YH06 001 speaker cover adhered to 60 3YH08 001 front bezel 452115 001 11 I O bracket assy with AC inlet 90 3YI28 007G 452126 001 12 Inverter board assy Inverter boards master and slave ma...

Page 41: ...55604 001 7 Internal support wall mount 33 3YI06 001 452097 001 8 Mesh bracket board cover 34 3YI01 001 452098 001 9 Speakers L and R speaker and wire connectors 23 40276 001 452108 001 10 Front bezel including speaker cover 60 3YJ16 001 speaker cover adhered to 60 3YJ15 001 front bezel 452116 001 11 I O bracket assy with AC inlet 90 3YI28 007G 452126 001 12 Inverter board assy Inverter boards mas...

Page 42: ...3 001 455604 001 7 Internal support wall mount 33 3YI06 001 452097 001 8 Mesh bracket board cover 34 3YI01 001 452098 001 9 Speakers L and R and wire connectors 23 40276 001 452108 001 10 Front bezel with speaker cover 60 3YJ16 001 speaker cover adhered to 60 3YJ15 001 front bezel 452117 001 11 I O bracket assy with AC inlet 90 3YI28 007G 452126 001 12 Inverter board assy Inverter boards master an...

Page 43: ... Manual 37 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 Number Picture of Replacement Part 1 2 3 ...

Page 44: ...38 HP High Definition LCD TV Service Manual Picture Reference Number Picture of Replacement Part 4 5 6 7 ...

Page 45: ...HP High Definition LCD TV Service Manual 39 Picture Reference Number Picture of Replacement Part 8 9 10 11 ...

Page 46: ...inition LCD TV Service Manual Picture Reference Number Picture of Replacement Part 12 LT3200 LT3700 LT4200 LT4700 Note 37 42 47 models will include two inverter boards Only one inverter board is shown for each model ...

Page 47: ...HP High Definition LCD TV Service Manual 41 Picture Reference Number Picture of Replacement Part 13 LT3200 LT3700 LT4200 LT4700 ...

Page 48: ...r is for use on notebook computers with DVI connectors After Service Checklist 1 Make sure all the mechanical parts such as screws are replaced properly 2 Verify that the peripherals of the serviced points have not undergone any deterioration during servicing 3 Verify that the screws parts and cables that are removed for servicing have all been returned to their proper locations per the original s...

Page 49: ...D TV Service Manual 43 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 ...

Page 50: ...44 HP High Definition LCD TV Service Manual LT4200 LT4700 ...

Page 51: ...ly Removing the Main Bracket Removing the Inverters Removing the Speakers Removing the Control Board Removing the Front Bezel Removal Order To remove the following components you can remove the main bracket while leaving the main board and power supply in place Control board IR board Inverters Speakers Screws All screws in the TV are all Philips head of differing sizes lengths and threads As a gen...

Page 52: ...tal 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 4 Carefully lift the pedestal off the TV ...

Page 53: ...l 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 ...

Page 54: ...nch model has two extra screws total of 15 one on each side toward the bottom of the unit 2 On all sides of the unit press the side of the back cover inward to release it from the inner latches 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 N...

Page 55: ...gh Definition LCD TV Service Manual 49 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 ...

Page 56: ...ke sure the buttons on the PCA are facing down and aligned with the buttons on the keyboard 2 One side of the keyboard has two tabs Snap the PCA into the slot below the two tabs 3 While properly aligning the PCA so it is straight in the keyboard press the PCA down into the slot below the tabs on the other sides of the keyboard until it snaps into place Removing the Infrared Board 1 Remove the one ...

Page 57: ...1 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 ...

Page 58: ... will replace these screws when you replace the back cover Note When replacing the board cover place the edge of the cover under the slots in the main bracket as indicated by the blue circles in the second of the two pictures above Removing the Main Board Removal procedures are similar for all models It is not necessary to remove the power supply to remove the main board Only the main board and ca...

Page 59: ...HP High Definition LCD TV Service Manual 53 1 Detach all the cables connected to the main board You must remove one screw to remove the LVDS cable Power jumper above ...

Page 60: ...54 HP High Definition LCD TV Service Manual Speaker IR cable above LVDS cable requires screw removal above ...

Page 61: ...HP High Definition LCD TV Service Manual 55 2 Remove the six screws from the I O bracket 3 Remove the five screws securing the main board to the main bracket ...

Page 62: ... one black self tapping screw next to the RCA jack and four hex screws two for each connector and then remove the bracket from the main board When attaching the new main board to the brackets Place the brackets and board on a flat surface First install the bracket with the VGA and RS 232 ports This bracket fits on the inside of the black connector bracket When replacing the main board bracket asse...

Page 63: ...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 ...

Page 64: ...P High Definition LCD TV Service Manual 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 ...

Page 65: ...HP High Definition LCD TV Service Manual 59 2 Remove the four screws securing the power supply to the main bracket 3 Remove the power supply ...

Page 66: ...n board in place This is useful when replacing speakers the control board the IR board or the inverters 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 ...

Page 67: ...e power supply the Master inverter cable outboard and the Slave cable is inboard You have to remove the main bracket but do not have to remove the power supply or main board to remove 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 c...

Page 68: ...out of the unit 2 Disconnect the cables from the connectors on the inverter board Note 4 total cables on Master 3 total cables on Slave To disconnect fragile flat ribbon cables disconnect all other cables grasp the end of the flat ribbon cable and then pull the board away from the cable Note To disconnect the cables grasp both sides of the cable near the connector and then pull the cable straight ...

Page 69: ...nd then lift the cover up and off the unit 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 ...

Page 70: ...d 1 on each side Pull the blue tabs straight out to disconnect the cables 3 Lift the inverter board up and off the unit Removing the Speakers You have to remove the main bracket but do not have to remove the power supply or main board to remove the speakers For the 32 inch model you must remove the power supply to remove the speaker To remove the speakers without removing the power supply or main ...

Page 71: ...HP High Definition LCD TV Service Manual 65 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 ...

Page 72: ...rol board LT3200 Control Board Removal 1 Disconnect the front LVDS cable by pressing the spring loaded latches on each side of the cable connector and then pulling the cable from the connector 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 Lif...

Page 73: ...ontrol board cover to the unit 4 Lift the cover from the unit 5 Disconnect the two 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 Note You cannot remove the ZIF cables from the side of the unit on the 32 inch and 37 inch models 6 Lift the board from the unit Note When replacing the cov...

Page 74: ...ng the cable from the connector 2 Remove the four screws that secure the control board cover to the unit Two of the screws are hidden under the pads 42 inch model shown 3 Lift the cover from the unit 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 sho...

Page 75: ...e six screws that secure the control board cover to the unit 3 Lift the cover from the unit 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 5 Remove the flat ribbon cables from the connectors on the main TV chassis 6 Lift the board from the unit Note When replacing...

Page 76: ...d 2 Remove the back cover 3 Remove the IR keypad assembly 4 Remove the speakers 5 Replace the stand and set the TV upright on the stand 37 inch model with back cover removed 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 ...

Page 77: ...sage Red LED blinking 2 sec interval Digital Demodulator does not respond Error code 003 digital demodulator does not respond requires source to be selected as antenna before the test is valid If source is not antenna it will always give you error code 003 because digital demodulator is not turned on until antenna source is selected Software version information Note You must be in Fullmenu to perf...

Page 78: ...de To access the Installation menu 1 Turn the TV on 2 On the remote press the Menu button 3 From the OSD select Setup Time 4 If the TV is NOT in Hotel mode press the following key sequences SAP MTS 1 3 5 5 If the TV is in Hotel mode change input source to AV2 then press SOURCE 1 3 5 Note Color adjustments in this menu apply to ALL modes Cool Standard or Warm If you want to adjust the color tempera...

Page 79: ...o 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 Remap AV audio port to HDMI audio Audio remap AV HDMI AV Audio port to AV input HDMI Audio port to HDMI Mode Allo...

Page 80: ...n menu 2 Access the install menu and change to HOTEL mode from Normal TV mode To access the installation menu 1 Turn the TV on 2 On the remote press the Menu button 3 From the OSD select Setup Time 4 Press the following key sequences SAP MTS 1 3 5 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 pr...

Page 81: ... Control Troubleshooting Remote control does not work Change battery Try another remote Check IR receiver Change LED IR board Change LED IR cable Replace main board Replace battery Replace remote control OK Replace LED IR cable YES YES NO YES NO YES NO ...

Page 82: ...D TV Service Manual Function Key The buttons do not work Check switches Check key board Check the key board cable Change the key board cable Replace the main board Replace tact switch Replace key board OK YES YES NO YES NO NO ...

Page 83: ...HP High Definition LCD TV Service Manual 77 Power TV Does Not Turn On ...

Page 84: ...efinition LCD TV Service Manual Audio No sound Check the connecter Check the speaker wire Replace the main board Reconnect Replace the speaker wire YES YES NO NO Check the speaker set Replace the speaker set YES NO ...

Page 85: ...igh Definition LCD TV Service Manual 79 VGA Input No picture on the screen Check if PC is working Check VGA connect Check VGA cable Replace the main board Check PC OK Replace VGA cable NO YES YES YES NO NO ...

Page 86: ...tion LCD TV Service Manual 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 NO YES NO YES NO NO ...

Page 87: ...e on the screen Check if PC is working Check DVI connection Check DVI to HDMI adapter Replace the main board Check PC Reconnect Replace adapter NO YES YES NO NO YES Check the HDMI cable Check the DVI cable Replace the HDMI cable Replace the DVI cable YES YES NO NO ...

Page 88: ... LCD TV Service Manual YPbPr Input 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 NO YES YES NO YES NO ...

Page 89: ... Video S video Input No picture on the screen Check if the Source is working Check connect Check cable Replace the main board Check signal source Reconnect Replace cable NO YES YES NO YES NO Check tuner audio board Replace tuner audio board YES NO ...

Page 90: ...in board connection LED Display abnormal If the LED is off dark abnormal check main board or cable If the LED flickers Power saving mode in VGA push any key to restart Abnormal Display Missing Line 1 Check the cable between the main board and the control board 2 Check the panel board Bright Dot Dark Dot Light Leakage Mura cloudiness Image Sticking Brightness spot Particles Dot Defect Check panel N...

Page 91: ...qua LED blinking 2 sec interval Audio process does not respond Main board Amber and aqua LED blinking 2 sec interval More than two I2C devices error Main board LCD Panel Troubleshooting Tips Inverter board Power board to panel inverter board left right Problem No back light Screen flash If the board is shorted no power Action Change inverter board Control board panel driver On top of the LCD panel...

Page 92: ...nual 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 ...

Page 93: ...HP High Definition LCD TV Service Manual 87 Problem Scrape on the LCD panel 2 Solution Change LCD panel or change Polarizer Problem Mura cloudiness Solution Change LCD panel ...

Page 94: ...88 HP High Definition LCD TV Service Manual Problem Line Solution Change LCD panel ...

Page 95: ...s Layout Typical of all models except 32 inch The 32 inch model has only one inverter No Description 1 Main board 2 Keypad board 3 IR board 4 Speaker left 5 Speaker right 6 Power supply unit board 7 AC socket Chassis Layout and Overall Wiring Diagrams ...

Page 96: ...nnector Specification Description CN19 13 pins ROHS 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 ...

Page 97: ...D TV Service Manual 91 Keypad and IR Boards Keypad Board IR Board Connector Specification Description CN1 9 pins ROHS Keypad control signal from main board CN12 CN1 6 pins ROHS IR signal and LED control from main board CN12 ...

Page 98: ...l Wires and Cables Wiring Main Board No Specification Input and output signal 1 PSU Ù Main board Vs 5V 12V 2 Panel ÙMain board XY signal 3 Power supply Ù Inverter board 24V 4 Speaker Ù Main board Audio signal 5 Keypad IR Ù Main board ADC signal ...

Page 99: ...HP High Definition LCD TV Service Manual 93 Wiring Diagram ...

Page 100: ...AC power back in 4 Turn on the TV using either the keypad or the remote control 5 Wait for 30 seconds The system will start the firmware update and the blue LED will blink every half second If the update fails the LED turns amber and continues blinking every half second If the update succeeds the blue LED automatically turns off after 150 seconds indicating that the firmware update is complete 6 U...

Page 101: ...rd 4 Compare the product ID from the image file with the product ID from flash memory If the product IDs match programming of the flash memory starts If the flash memory of the main board is blank no ID is found programming starts This is primarily for manufacturing If the two IDs do not match programming stops and an LED warning light blinks Limitation of this Implementation No chip ID available ...

Page 102: ...Part Number 454404 002 ...

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