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High-Definition LCD TV Service Manual: Models

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1. 125 are effective Major number for digital channel combine with DCN command Minor number for digital channel combine with DNJ The channel number of TV If not TV display it will input 1 switch to TV same function as The channel number of TV If not TV display 1t will input switch to TV same function as CH Down CC operation erh m I econ CC Mute ma CC on while audio ai ima ea Gm a owexo i bai meo Supms Ts a fe fe fe im Color temperature pw SC Bee 2lalele dea 3 y we COT i mode E 2 33 standard mode PEPE a EE HL Ei TI PERE y Internal Speaker Off Internal speaker off SPDIF is still MS PE HP High Definition LCD TV Service Manual 27 Control Item Command Air cable selection for Auto Search Start auto search Channel skip Skip analog channel Skip digital channel Major Skip digital channel Minor Reset to default Set time mode Set time Set time year Set time month Set time day Set time hour Set time minute NE 28 HP High Definition LCD TV Service Manual Control Contents Air for Auto Scan Move this command to Auto Search Skip a certain valid analog channel E E LE Re I Start auto search if current Need air cable input type source is TV ACS command before starting auto search Manually search a certain Dig
2. 86 1H524 8R0 86 RA324 100 86 VA326 100 86 9A338 150 86 1A526 100 34 HP High Definition LCD TV Service Manual Model LT4200 To see the pictures of the replaceable parts go to the Replacement Parts List Reference Picture section Picture Number Part Description OEM Part Number HP Part Number 2 Stand neck assy 455589 001 Stand neck 42 3YJ06 001 Repair screw kit 6K 3YISC 003 Power supply assy For 4x models 338W 455592 001 Power Supply 4x model 56 04338 R01 System board to power supply cable 50 3YJ02 001 Main board assy 455595 001 Main board 91 3YW10 003G System board to power supply cable 50 3YJ02 001 5 Back cover bucket 60 3YJ05 001 452094 001 Keypad Infrared assy 455604 001 Keypad buttons 60 3YJ03 001 Keypad PCA board 91 3YK10 003G Infrared board 91 3YK10 002G System board to keypad IR cable 50 3YJ03 001 7 Internal support wall mount 33 3Y106 001 452097 001 Mesh bracket board cover 34 3Y101 001 452098 00 1 Speakers L and R speaker and wire connectors 23 40276 001 452108 001 10 Front bezel including speaker cover 60 3YJ16 001 speaker cover 452116 001 adhered to 60 3YJ15 001 front bezel Inverter board assy 455598 00 1 Inverter boards master and slave master pictured Inverter cable master or 1 Inverter cable slave or 2 Control board assy Control board LVDS cable Ribbon cables aty 4 Power cord 8121 0740 Remote contro 5188 6301 90 3Y126 001 452113 001 Cable clamp
3. e Once removed the chip cannot be reused Attachment of SMDs 1 Locate the SMD on the solder lands by means of tweezers and solder the component on one side Ensure that the component is positioned correctly on the solder lands A 2 Complete the soldering of the terminals of the component B eg A PAIR OF TWEEARES SOLDER 0 5 0 8mm PRESURE SOLDER IRON SOLDER R 405 0 810m SOLERIMG TIME PRESURE IRON A CAUTIONS e When soldering the SMD terminals do not touch them directly with the soldering iron The soldering should be done as quickly as possible care must be taken to avoid damage to the terminals of the SMDs themselves e Keep the SMD s body in contact with the printed board when soldering e The soldering iron to be used approximately 30 W should preferably be equipped with a thermal control soldering temperature 360 to 380 C e Soldering should not be done outside the solder land e Soldering flux of rosin may be used but should not be acidic e After soldering let the SMD cool down gradually at room temperature e The quantity of solder must be proportional to the size of the solder land If the quantity is too great the SMD might crack or the solder lands might be torn loose from the printed board Rework on Ball Grid Array BGA ICs General information Although LF BGA assembly yields are very high there may still be a requirement for component rework By rework we mean
4. gt 7 gt 0 gt 4 To return to Simplemenu select Simplemenu from Fullmenu TV OSD Menu Structure Fullmenu Mode Vibrant M anea 1 Studio User BE II po Brightness pi po Contrast 0 000000 0 Saturation 0 0 0 0 Lo He ooo o Smapnss 0 00000000 o Color Temp Cool IO E po Standard O 2 Warm IN SM MSc AspectRatio O ISS EE po 4 3 Mode ss Zoomi Zoom UU LLL PC JHPositon Position jJ y Lo Size 0 0 0 S y O Lo S Wsie 0 0 0 0 0 S O Phase Adjust PP Clock Adjust o Ato Syn E 0 0 po Defatted Mose ZT en A ME Ie Ie AAA o ee rebe jUsermodeoly A4 1 CBs j Usermodeoly Balncee IIS iita Volume On O 0004 o off IO E English iii LE Spanish O NAAA French IS RE si Digital Audio Dolby Digital pu PCM E i Virtual Surround Off BE ee po Theater LLL Music Hall HP High Definition LCD TV Service Manual 21 On p o O A NEZ Air O ISS Cable uan Chanellist Show Hidechannel Signal Strength Change Password Lock Enable On O Sc IMI IO O Sc MI IA Lo ES 1 Not Rated LLL USTV Rating FV V S L D O MI IS E po Baas 0 0 0 0 0 y O Lo Bans 0 0 S y O Bans Auto S Manual Active for Aut
5. whereas others are three headed and require a separate stereo audio cable The cables are connected as follows The green port labeled Y connects to the cable carrying the Y signal The blue port labeled Pb connects to the cable carrying the Pb signal The red port labeled 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 4801 480p 720p and 10801 analog standard and high definition format inputs The TV automatically determines what format 1s being used by the currently connected device HDMI Connectors High Definition Multimedia Interface HDMI 1s an all digital audio video interface This series of TVs uses HDMI version 1 2 and supports 4801 480p 720p and 10801 digital format inputs The TV automatically determines what format is being used by the currently connected device I I k i E y ET HDMI2 a Ker i HOMI 1 18 HP High Definition LCD TV Service Manual HDMI devices are usually HDTV receivers or DVD players They connect using a single cable with a multipin connector These TVs have three HDMI ports so up to three HDMI devices can be connected at the same time The HDMI 1 port additionally supports 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
6. 38 05031 001 452127 001 Repair screw kit 34 37P06 001 452128 001 86 00G29 668 86 1A334 6R0 86 1A336 6R0 86 1H524 8R0 86 RA324 100 N 27 D005861 50 3YJ05 001 50 3YJ08 001 455602 001 W 35 D010727 M 50 3YJ04 001 32 D005703 86 VA326 100 86 9A338 150 86 TA526 100 HP High Definition LCD TV Service Manual 35 Model LT4700 To see the pictures of the replaceable parts go to the Replacement Parts List Reference Picture section Picture Number Part Description OEM Part Number HP Part Number 2 Stand neck assy 455590 001 Stand neck 60 3YK02 001 Repair screw kit 6K 3YISC 003 Power supply assy For 4x models 338W 455592 001 Power supply 4x model 56 04338 R01 System board to power supply cable 50 3YJ02 001 Main board assy 455595 001 Main board 91 3YW10 003G System board to power supply cable 50 3YJ02 001 5 Back cover bucket 60 3YK04 001 452095 001 Keypad Infrared assy 455604 001 Keypad buttons 60 3YJ03 001 Keypad PCA board 91 3YK10 003G Infrared board 91 3YK10 002G System board to keypad IR cable 50 3YJ03 001 7 Internal support wall mount 33 3Y106 001 452097 001 Mesh bracket board cover 34 3Y101 001 452098 00 1 Speakers L and R and wire connectors 23 40276 001 452108 001 10 Front bezel with speaker cover 60 3YJ16 001 speaker cover 452117 001 adhered to 60 3YJ15 001 front bezel Inverter board assy 455599 00 1 Inverter boards master and slave master pictured Inverter cabl
7. D inches centimeter 21 6 54 8 x 30 9 78 5 x 5 0 12 7 24 3 61 7 x 35 7 90 7 x 5 2 13 2 Weight with stand 40 7 Ib 18 OT IAB KE 49 5 Ib 22 49 5 10 22 kg Regulatory Safet compliance y FCC Class B C UL and UI FCC Class B C UL and UI 8 HP High Definition LCD TV Service Manual General TV Specifications LT4200 and LT4700 Model number LT4200 LT4700 Availability On Ad June 2007 June 2007 Brightness 500 cd m2 500 cd m2 Resolution 1920 x 1080 1920 x 1080 Contrast Ratio 1200 1 1200 1 Viewing Angle 176 degrees 176 degrees Video Response Time 8 ms 6 5 ms Scalar Trident LX66 Trident LX66 Supported Input 4801 480p 720p 10801 1080p HDMI 4801 480p 720p 10801 1080p HDMI only only unin 3D Digital Comb Filter Video Noise Reduction 3 2 Pull down HP Visual Fidelity Engine Video enhancers Photorealistic Sharpness Enhancement 3D Color Enrichment Motion adaptive Deinterlacer EN RR COTA n 2 Ba s 3 swam 2 emp FI Bev ae a eson 21 41 CEC p am i x do ix smhkow E mede o 8 i HP High Definition LCD TV Service Manual 9 General TV mm Continued E RR IT RT ee e Pre Gan es e CS CO m w wa wm Nw Duos Ne Ne Color Bezel and Stand Bezel and Stand Power supply 120V AC 60Hz 120V AC 60Hz Power consumption W 300W 33
8. JE M 42 1nch 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 nM Dade cem ME i e MET e e RET A B A 2147 A a A A as ST a er 42 inch model shown 68 HP High Definition LCD TV Service Manual 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 LT4700 Control Board Removal 1 Disconnect the front LVDS cable by pressing in on the spring loaded latches on each side of the cable connector and then pulling the cable from the connector 2 Remove the six screws that secure the control board cover to the unit RC TMA DARIA a 1444 Hl T rmn HA Ti gusi qi ibit m I n M 35 D013131 LEWNR632 10029 kam DU um sd zi YD pe it 1 one 3 J PR x e gapetetaiauss Ve iin T la Ar AA rea AAA LA um Ar Di iii Cs l B w er s i s i CELULIT i g E A gt 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 r
9. 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 Note The USB flash drive must be formatted in FAT32 or the update will not work Note There must be no files on the flash drive except the two components of the firmware update as listed above Note The firmware for the 32 inch and 37 inch TVs is not interchangeable with the firmware for the 42 inch and 47 inch TVs Once you have the correct firmware update on the USB drive perform the following steps Unplug AC power 2 Plug in USB drive 3 Plug 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 Unplug AC power 7 Remove the USB drive Plug in AC power 9 Turn on the TV using either the keypad or the remote control 10 Verify the firmware version is correct Note If the update fails check the USB drive to ensure that it is formatted in FAT32 and that it is empty except for the two update files If it still does not work try using a different USB drive Safe Software Update Procedure Introduction This proc
10. Manual 33 Model LT3700 To see the pictures of the replaceable parts go to the Replacement Parts List Reference Picture section Picture Number Part Description OEM Part Number 2 Stand neck assy pr 455588 001 Stand neck 42 3YH02 001 Repair screw kit 6K 3YISC 003 Power supply assy For 3x models 230W ES 455591 001 Power supply 3x model 56 04230 Q01 Main board to power supply cable 50 3YJ02 001 Main board assy 455594 001 Main board to power supply cable 50 3YJ02 001 5 Back cover bucket 452093 001 455604 001 Keypad Infrared assy Keypad buttons 60 3YJ03 001 Keypad PCA board 91 3YK10 003G Infrared board 91 3YK10 002G System board to keypad IR cable 50 3YJ03 001 7 Internal support wall mount 33 3Y106 001 452097 001 452098 001 452108 001 Mesh bracket board cover 34 3Y101 001 Speakers L and R and wire connectors 23 40276 001 10 Front bezel including speaker cover 60 3YH06 001 speaker cover 452115 001 adhered to 60 3YH08 001 front bezel Inverter board assy 455597 001 Inverter boards master and slave master pictured Inverter cable master or 1 Inverter cable slave or 2 Control board assy Control board N 6632L 0314A master 6632L 0315A slave 50 3YG03 001 50 3YG04 001 455601 001 W 6871L 1083A LVDS cable 50 3YG02 001 Ribbon cables 6851L 0071E Power cord 8121 0740 452113 001 452127 001 452128 001 Remote control Cable clamp Repair screw kit 86 1A336 6R0
11. floating ground If any connection other than the one specified is made between the measuring equipment and the high voltage power supply block it can result in electric shock or activation of the leakage detection circuit breaker e When installing the LCD module into and removing it from the packing carton be sure to have at least two people perform the work while being careful to ensure that the flexible printed circuit cable of the LCD module does not get caught by the packing carton e When the surface of the panel comes into contact with the cushioning materials be sure that there 1s no foreign matter on top of the cushioning materials Foreign matter may scratch the surface of the panel e Be sure to remove static electricity from your body before handling the circuit board e Be sure to handle the circuit board by holding the large parts such as the heat sink or transformer Failure to observe this precaution may result in the occurrence of an abnormality in the soldered areas e Do not stack the circuit boards Failure to observe this precaution may result in problems resulting from scratches on the parts the deformation of parts and short circuits due to residual electric charge e Routing the wires and fixing them in position must be done in accordance with the original routing and fixing configuration when servicing 1s completed All the wires are routed far away from the areas that become hot such as the heat sink
12. hours of no activity before auto SHUT_OFF is activated O PWR Manage is OFF Default 1 1 hr 2 2 hrs etc This command detects I O activity IR or keypad or RS232 commands and if there is no activity for specified hours TV will be turned off after specific times iii E S RESET OFF 0 TV starting with Previous input on Power On Default N i 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 HDMII 7 HDMI 8 HDMI3 Pair with STR_AUX_SOURCE command SAS K KEYBOARD LOCK 1 TV front keyboard except PWR is xk locked IR control key works 0 TV front keyboard is unlocked Default E 2 ENABLE Blank video mute 0 Normal video Default This is only through RS232 commands VIDEO MUTE ENABLE REMOTE CON MODE 30 HP High Definition LCD TV Service Manual Control Item PARAMETER Return Data Description l SET ON 1 Set starting with auxiliary source input which is selected by SOURCE AT P ON command SON on Power ON Pair with SOURCE AT P ON command SON AUDIO MUTE 1 Audio muted if no signal is present 0 Audio is NOT muted Same as current implementation Default ds REMOTE ACTIVE 0 PC 1 Remote control 2 Enable both PC and remote Default START CHANNEL i pes SELECT Analog Channel a Power ON Channel 1 125 channel 1 125 126 map to Ch3 127 map to Ch4 255 tune to last channel before turn pow
13. other components while the unit is turned on 2 When making settings use plastic rather than metal tools This will prevent any short circuits and the danger of a circuit becoming unstable WARNING To prevent electrical shock do not use the polarized AC plug with an extension cord receptacle or the outlet unless the blades can be fully inserted to prevent blade exposure To prevent electrical shock match the wide blade or plug to a wide slot and fully insert WARNING When replacement parts are required be sure to use replacement parts specified by the manufacturer or have the same characteristics as the original part Unauthorized substitutions may result in fire electric shock or other hazards HP High Definition LCD TV Service Manual 1 WARNINGS Safety regulations require that after a repair the set must be returned in its original condition In particular attention should be paid to the following points NOTE The wiring should be routed correctly and fixed with the mounted cable clamps The insulation of the main leads should be checked for external damage e Do not touch the signal and the power connector while this product is operating Do not touch the EMI ground part and the heat sink of the film filter e Do not supply a voltage higher than that specified to this product This may damage the product and may cause a fire e Do not use this product in locations where the humidity 1s extremely high where 1t
14. 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 It is used to receive digital instructions from control applications running on a computer HP High Definition LCD TV Service Manual 19 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 Default selections are shown in bold OSD On Screen Display Functions Simplemenu TV OSD Menu Structure Simplemenu Man Subt Sub2 Options Vibrant Standard IS Studio User rightness Contrast I Saturation He Tr Sharpness Foster Temp Coo m Standard BEER _ Aspect Ratio Auto 16 9 Mode Ei eee Auto Volume On Off Virtual Surround Off Theater 7 Maso Ha On Speaker X On OR AS On Mute Default Settings 20 HP High Definition LCD TV Service Manual OSD Functions Fullmenu To access Fullmenu select SETUP gt 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
15. s fms a BR I em vs HP High Definition LCD TV Service Manual 11 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 TV Indicators and Controls POWER Power button turns on the TV or places it in standby mode MENU Menu displays the onscreen display OSD or closes the OSD menu SELECT SELECT starts the Auto Sync function for a connected PC signal In an OSD 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 Channel CH selects the next or previous channel In an OSD menu press these buttons to move up or down in the menu gt SOURCE SELECT Volume VOL raises or lowers the sound level In an OSD menu press these buttons to move right or left in the menu or to adjust an item A LED Amber TV is powering on light turns off after about 30 seconds Indicat un 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 Control Sensor ar 7 tao 12 HP High Definition LCD TV Service Manual Remote Control IR protocol RC6 Remote control Remote control button label Remote control function Power Use to t
16. the new component on the board Ideally the LF BGA should be aligned under a microscope or magnifying glass If this is not possible try to align the 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 5 Product Information and Specifications Product Information This specification table describes the key areas of all hardware service requirements of large entertainment High Definition LCD Television models LT3200 LT3700 LT4200 and LT4700 This document is for HP service personnel 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 All models can be used as monitors for your PC with a VGA connector Specifications LCD Panel Module Model name LT3200 LT3700 LT4200 LT4700 32 Model 37 Model 42 Model 47 Model Number of pixels 1366 H x 768 V 1366 H x 768 V 1920 H x 1080 V 1920 H x 1080 V Expected lifetime 60 000 hours 60 000 hours 60 000 hours 60 000 hours NOTE For more detailed specifications
17. to accept next command For example the channel scan command takes minutes For Normal Response O K CR CR Carriage Return ODh For Error condition E R R CR CR Carriage Return ODh Special command extension ice PARAMETER Return Data GET G S T lo _ Power 0 Off return from MCU 1 On STATUS i Mute o Off1 On2 0nMute Return 2 Volume Current Volume level 0 100 ASCII format current TV 3 CH major 0 9999 e g Ch 99 0099 Ch 9 0009 in status ASCII value BITS Tv 0 9999 e g Ch 99 0099 Ch 9 0009 in ASCII 5 Capion o Off1t 0On____ 6 Input source 0 8 TV Air Cable AV1 AV2 YPbPr I YPbPr2 VGA HDMI HDMI2 HDMI3 ugg 5 0 Auto 1 16 9 2 4 3 3 Zoom1 4 5 8 Brightness 0 100 e g 7 gt 0007 77 gt 0077 in ASCII 9 Contrast 0 100 e g 7 gt 0007 77 gt 0077 in ASCII A Sharpness 0 100 e g 7 gt 0007 77 gt 0077 in ASCII B Color 0 100 e g 7 gt 0007 77 gt 0077 in ASCII C He 0 100 e g 7 gt 0007 77 gt 0077 in ASCII Get Status RETURN message format for GST Get Statue command Format of WXYZ always 4 bytes For all return values add prefix with Os 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 retu
18. 0W Dimensions with stand 28 5 72 4 x 40 0 101 6 x 11 0 31 7 80 5 x 44 4 112 8 x 11 0 H W D inches centimeter 27 9 27 9 Dimensions without stand 26 6 67 6 x 40 0 101 6 x 5 3 29 3 74 4 x 44 4 112 8 x 5 4 H W D inches centimeter 13 5 13 7 Weight with stand 61 6 Ib 28 kg 75 9 b 24 kg Regulatory Safet compliance y FCC Class B C UL and UI FCC Class B C UL and UI General 10 HP High Definition LCD TV Service Manual VO Connectors HDMI Digital High Definition Input Video Input Connector with HDCP Type A e HDMI 1 with HDMI audio in L and R e HDMI2 e HDMI3 Audio L and R must be set to PCM at the source across HDMI Audio Output e Digital Optical in Dolby Digital or PCM format S PDIF e Audio Output L and R stereo analog RCA ANT Cable in RF input 75 ohm unbalanced F type for VHF UHF CATV in Component High Definition Input e 1 Y Pb and Pr and audio L and R e 2 Y Pb and Pr and audio L and R Serial RS 232 Serial input Commercial use only Standard Definition Input e AV Input I S Vid Video and Audio Land R e AV Input 2 S Vid Video and Audio L and R Factory Preset Display Modes Horizontal Vertical frequency Horizontal frequency Vertical Pixel Clk Preset Pixel format kHz polarity Hz polarity MHz Source ho spem aa sm pass Ivan 23843 sa esa ma mas mar mm vm e ma RR em vsa 7 meom see I mas Dom vs o amw om mms E mm vn
19. D DISCUSSED HERE IS SN AG CU THAT IS TIN SN SILVER AG AND COPPER CU ALTHOUGH OTHER TYPES ARE AVAILABLE This model is manufactured using Pb free solder for the sake of environmental conservation For service and repair work we suggest using Pb free solder as well although Pb solder may be used PCBs manufactured using Pb free solder have the sign Pb stamped on the PCB A CAUTIONS e Pb free solder has a higher melting point than Pb solder Typically the melting point is 50 70 F 30 40 C higher Use a high temperature soldering iron Adjust your solder tool so that a temperature around 360 380 C is reached and stabilized at the solder joint Heating time of the solder joint should not exceed 4 seconds Avoid temperatures above 400 C wear out of tips will rise drastically and flux fluid will be destroyed e Pb free solder will tend to splash when heated too high about 1 100 F or 600 C e Mix of Pb free solder Tin SN parts with leaded soldering Tin SN in parts is possible but not recommended If you have to use Pb solder completely remove all of the Pb free solder on the pins or solder area before applying Pb solder If this 1s not practical be sure to heat the Pb free solder until it melts before applying Pb solder e 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 com ponent compo
20. High Definition LCD TV Service Manual Models LT3200 LT3700 LT4200 LT4700 Copyright 2007 2008 Hewlett Packard Development Company L P The information contained herein is subject to change without notice 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 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 Packard Company Service Reference Guide Business PCs Second Edition April 2008 First Edition June 2007 Document Part Number 454404 002 Table of Contents High Definition LCD TV Service Manual 1 Models 132003 13700 ET4200 14700 ee 1 Tabe OE Content rue ee ua lei ii Important Service Safety Pretautions uuses naar ERER HE TREE 1 Watios and AOS Sa seat esse l Sare Handiins and Servic NE a e r E EE EE E ENET NEE 2 REPA D ee es EMI Mp uM M CMM 3 POO Ce ACHE Tee SOIUCI Le odes es iot tato E e Mte U LIES 3 suo posted Db EIeessoOlde P tao lleida iones 4 Servicins oL urtace Mounted Devices SMDS he riera ee none 4 Rew
21. LT3700 LT4200 LT4700 HP High Definition LCD TV Service Manual 41 Removal and Replacement This section includes information about disassembling the LCD TV for service Equipment and Tools Needed for Removal and Replacement Tools 1 and 2 magnetic Philips screwdriver with 6 inch shaft no greater than 3 8 inch in diameter 3 16 inch hex driver 5 8 inch hex driver ESD protect gloves ESD protect wristband Note An HDMI to DVI converter 1s 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 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 42 HP High Definition LCD TV Service Manual Four Models Comparison Pictures This section provides pictures of each T V 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 43 LT4200 LT4700 44 HP High Definition LCD TV Service Manual Removal Procedures Included in this sec
22. 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 AE PM AL WM Mth TH d MIL 2 Disconnect the six cables from the connectors on the rear of the inverter board and the remaining cable from the connector on the front of the board Note The connectors have a catch you must push down before removing the cable JA Wig gt y 3 Lift the inverter board up and off the unit HP High Definition LCD TV Service Manual 61 LT 3700 Inverter Removal Note The 37 inch model has different sized inverters as well as an additional flat ribbon cable from the inverter to the control board 1 Remove the six screws that secure the inverter cover to the unit and then lift the cover up and 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 out of the connector u MULE E u y E D EEE EEEET ERYR Sy 3803 AE A x t rms m 7 LA y 2 see T a Td ac f IT s M au TIENE Slave inverter 3 Lift the inverter board up and off the unit 62 HP High Defi
23. These wires are fixed in position with the wire clamps so that the wires do not move thereby ensuring that they are not damaged and their materials do not deteriorate over long periods of time Therefore route the cables and fix the cables to the original position and states using the wire clamps e Perform a safety check when servicing 1s completed Verify that the peripherals of the serviced points have not undergone any deterioration during servicing Also verify that the screws parts and cables removed for servicing purposes have all been returned to their proper locations in accordance with the original setup e A glass plate protects the LCD display This glass plate can be cleaned with a slightly moist cloth If dirt appears between the glass plate and the LCD display panel have only a qualified service employee clean it Repair Tips i WARNING All ICs and many other semiconductors are susceptible to electrostatic discharges ESDs Careless handling during repair can be life threatening When repairing make sure that you are connected with the same 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 AN
24. and 1080P have same chip e When flash memory of the main board is blank you can program the firmware PDP software update_PDP tgz can be programmed on a new LCD main board blank flash memory which has no product ID Please note that this 1s rare because all TV main boards are pre programmed and verified in the factory and the product ID is embedded in main board flash memory e 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 Part Number 454404 002
25. ange the default Black Level format 72 HP High Definition LCD TV Service Manual Dark 7 5 IRE Active only for Component 4801 input This menu is enabled Component input only The selection is only effective for 4801 format Audio re map The audio remap option allows a custom installer to use the Composite S Video audio ports as extra input audio ports for DVI sources For example if the installer wants to connect a set top box to HDMI 2 using a DVI to HDMI cable using this menu the installer can assign the AV2 audio port as the corresponding audio port for HDMI 2 This allows installers to install up to three DVI sources with separate audio 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 Remap AV audio port to HDMI audio PA AV Audio port to AV input HDMI Audio port to HDMI Mode Allows you to select Hotel or Normal mode default is Normal mode o e en ClearUserROM Clears all user setting values to default including password channel list and favorite channel list ClearUserROM Exit Select to exit from the Installation OSD menu Hotel mode Hotel mode allows hotels to not allow their guests to change TV configura
26. anual 49 Installing the PCA into the Keyboard The keyboard PCA may not come installed into the keyboard If not installed use the following procedure to install 1 Make sure the connector on the PCA is facing outward so it fits into the slot in the keyboard and make 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 1t snaps into place Removing the Infrared Board 1 Remove the one screw securing the infrared board 50 HP High Definition LCD TV Service Manual 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 Removine the Wall Mount Brackets Remove the four screws and lift the wall mount brackets away from the board cover LL HP High Definition LCD TV Service Manual 51 Removing the Board Cover Remove the seven screws from the board cover and remove the board cover Note When replacing the board cover do NOT replace the screws above the s video connectors and the red and white RCA jacks audio output as indicated by the arrows in the first of the two pictures above You will replace these screws when you replace the back cover Note When replacing th
27. ctor cable above HP High Definition LCD TV Service Manual 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 59 Removing the Main Bracket You can remove the main bracket with the power supply and main board in place This 1s 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 60 HP High Definition LCD TV Service Manual 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 there is a Master and a Slave If you are facing the back of the unit the Master inverter is on the left side above the speaker marked L for left When plugging inverter cables into the 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
28. d 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 1s selected Software version information Note You must be in Fullmenu to perform this function with a link back to the place showing how to access Fullmenu To access the software version information OSD 1 Turn the TV on 2 Press the Menu button 3 From OSD select Setup gt Time 4 Press the following keys SAP MTS gt 7 gt 7 gt 7 The software version information displays on the lower right corner of the TV 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 3 Diagnostic test begins HP High Definition LCD TV Service Manual 71 How to get back to normal TV operation after running diagnostics 1 After the diagnostic test finishes power off the TV and disconnect the power cord 2 Wait for about 30 seconds and then plug the power cord back in The TV returns to normal mode Installation menu The TVs incorporate custom menus that are accessible only through a special combination of the keys on the remote control These menus are not available to al
29. dure mmmmmmmmmrmmmmmm m m m m mrmrmrmrm m mmmmrmrmrmmm mrmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm 94 Introduction RTT EN 94 Sortewate Peaure IRCQUIPCMICIT OPA PR OPE O OO o Po o N 95 Sottwate Update Procedure ido a dde ios 95 Litanio or this Implementation 95 HP High Definition LCD TV Service Manual v vi HP High Definition LCD TV Service Manual Important Service Safety Precautions BEFORE SERVICING THE LCD MODULE READ THE SAFETY PRECAUTIONS IN THIS MANUAL WHEN REPLACEMENT PARTS ARE REQUIRED BE SURE TO USE REPLACEMENT PARTS SPECIFIED BY THE MANUFACTURER Proper service and repair 1s important to the safe reliable operation of all HP equipment The service procedures recommended by HP and described in this service manual are effective methods of performing service operations Some of these service operations require the use of tools specifically designed for their purpose and should be used as recommended It 1s important to note that this manual contains various Cautions and Notices that should be carefully read in order to minimize the risk of personal injury to service personnel Improper service methods may damage the equipment It is also important to understand that these Cautions and Notices are not exhaustive HP could not possibly know evaluate and advise the service trade of all conceivable ways in which service might be done or of the possible hazardous consequences of each way Consequently HP has not u
30. e master or 1 Inverter cable slave or 2 Control board assy Control board LVDS cable Ribbon cables aty 4 Power cord 8121 0740 Remote control 5188 6301 90 3Y126 001 452113 001 Cable clamp 38 05031 001 452127 001 Repair screw kit 34 37P06 001 452128 001 86 00G29 668 86 1A334 6R0 86 1A336 6R0 86 1H524 8R0 86 RA324 100 N 27 D005130 50 3YK02 001 50 3YJ08 001 455603 001 Uo 35 D013131 50 3YK01 001 32 D007123 86 VA326 100 86 9A338 150 86 1A526 100 36 HP High Definition LCD TV Service Manual 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 37 Picture Reference Number 38 HP High Definition LCD TV Service Manual Picture of Replacement Part i Picture Reference Picture of Replacement Part HP High Definition LCD TV Service Manual 39 Picture Reference Picture of Replacement Part Number 1713200 LT3700 LHESR TO ESAS 1714200 12 1714700 J J gt on id zd ng CS a u A aa el Nin Note 37 42 47 models will include two inverter boards Only one inverter board is shown for each model 40 HP High Definition LCD TV Service Manual Picture Reference Picture of Replacement Part Number 1713200
31. e 72 Hot Dmnoderes AMI q e LI ILI E E ME 73 How to enadble ana disable su coti p n6 oi testo MOS e e basen EAM LEES 74 TroubleshioOHD aii is 75 NA A E bois CELSERUROEERTEE SERREUEOEL cet Cee ho ias 75 A A ernennen 76 Power TW Does Not TUM Oesoto nes endete iii 71 PENITUS UU TTE 78 VOGA TPI passe Ga P A aosa E 79 RO 80 DS TAN UU Rees ee A COMM EM ADEM es ae a a ee 81 A rrr T NAE 82 TS NAE SPVIIEO TNDUD SER Eo ee ae 83 dl er eu 84 OE ee A o A TI a a 84 NO Vid CO ee Nee dt ee Nase 84 iv HP High Definition LCD TV Service Manual Keypad ano nenn eco 84 TED isp lac a ses 84 PEO o Reiner SARAH at 84 LED Display SIONIS 85 LCD Panel Troubleshoo0mns TIPS nenne ernennen 85 a ee are Nee hear 85 e ontrolboard paneldiiven RR C 85 IB ABRE UID MR UU m UU TT 85 SCHE ROO E I E m 85 Examples0 detec ty 6 LD T se hei 86 Chassis Layout and Overall Wirins DIagTaMS i sisisssccsssicesevsscaaccesssacssvecsssecsaseenseniacedsseassnseecssesenscasiwsdedsssdiasseseetesenes 99 Boards Layout Typical of all models except 32 INch ooocccccccconononononanonnnnnnonnnnnononnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnaninnnnnnss 89 COMMECIORS 0 PP RNA 90 o ee ass E 90 Kevypadcand IB Boards ranita ista 91 AV THES ATC Cables WIN S a ilu 92 Mai Boarder 02 AD O A ccunasac oe aamenas 93 Firmware Update Procedure u sn A E nella 94 O 94 Sale SOI ware Update Proce
32. e No back light e Screen flash e Ifthe board is shorted no power Action Change inverter board Control board panel driver On top of the LCD panel Problem e Wrong color e Screen has big block on H or V over 10 cm Action Change panel 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 e Mura cloudiness e Crack Action Change LCD panel HP High Definition LCD TV Service Manual 85 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 i L u a a Ei nn me E zes E i E Tj i D a Problem LCD crack Solution Change LCD panel Problem Scrape on the LCD panel 1 Solution Change LCD panel 86 HP High Definition LCD TV Service Manual Problem Scrape on the LCD panel 2 Solution Change LCD panel or change Polarizer Hk ILI en Problem Mura cloudiness Solution Change LCD panel HP High Definition LCD TV Service Manual 87 Problem Line Solution Change LCD panel 88 HP High Definition LCD TV Service Manual Chassis Layout and Overall Wiring Diagrams Boards Layout Typical of all models except 32 inch The 32 inch model has only one inverter Lar r E 5 6 mu O AAA ttt E TEESE IR S g g g HP High Definiti
33. e 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 1s 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 52 HP High Definition LCD TV Service Manual 1 Detach all the cables connected to the main board You must remove one screw to remove the LVDS cable ae PB uvis Power jumper above HP High Definition LCD TV Service Manual 53 4 E 2 P 1 gt d l u E we a ind m asa 2 Speaker IR cable above LVDS cable requires screw removal above 54 HP High Definition LCD TV Service Manual 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 55 4 Remove the main board together with the I O bracket 5 To remove the brackets from the main board a Remove the collar nut from the antenna cable in connector b On the black faced bracket that has the row of TV connectors remove the three black machine screws located over the HDMI ports c Remove the five remaining black self tapping screws and then remove the bracket fro
34. edure is designed to prevent programming of the software image update tgz to an improper TV board This procedure blocks programming between 720P and 1080P between PDP and LCD and between StarGate TVs and Volume TVs 94 HP High Definition LCD TV Service Manual Software Feature Requirement 1 safe kernel imgl reads images with different names as follows a update _LCD720 tgz b update_LCD1080 tgz 2 safe_kerenl imgl 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 2 Run Safe Kernel When you run Safe kernel it reads update_XXX tgz uncompresses it and extracts the Product ID of the software image file update_xxx tgz 3 During the software upgrade process Safe Kernel extracts the Product ID from the flash memory of the main board 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 e No chip ID available 720P
35. er 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 Command PARAMETER Parameter Return Data Description SELECT Digital 1 999 A channel number MAJOR Channel SELECT Digital 1 same IE Minor channel number MINOR Channel This Command is valid only when SOURCE CHANNEL LOCK ENABLE 1 Enables channel lock so cannot change channel from current channel from IR remote usually the START channel 0 Default channel lock is disabled No change from Remote START VOLUME 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 0 100 Select MIN allowance volume setting O Default MNV setting must be less than MXV MAX VOLUME 0 100 Select MAX allowance volume setting 100 Default MNV setting must be less than MXV MUTE DISABLE 1 Disable audio mute 0 Sound mute can be activated Default Blocks Mute function When TV is in Mute status and receives MDII TV audio is activated Then Mute button of remote and MUTO 1 Mute On Off command is ignored HP High Definition LCD TV Service Manual 31 Return messages For every command TV should return reply Controller waits before sending another command because some commands take time before TV is ready
36. fully lift the pedestal off the TV 46 HP High Definition LCD TV Service Manual 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 47 Removing the Back Cover 1 Remove the thirteen screws as shown Note Screws 9 10 11 12 and 13 are sheet metal screws During reassembly make sure you return these sheet metal screws to their proper location Note The 47 inch model has two extra screws total of 15 one on each side toward the bottom of the unit ei O 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 Note Removing the cover can be difficult and may take some time 48 HP High Definition LCD TV Service Manual 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 A E i i HP High Definition LCD TV Service M
37. he power supply to remove the speaker 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 64 HP High Definition LCD TV Service Manual 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 65 3 Remove the speakers from the LCD module Removing the Control Board You have to remove the main bracket but do not have to remove the main board or power supply to remove the control 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 Lift the board from the unit 66 HP High Definition LCD TV Service Manual Note When replacing the cover insert the edge of the cover into the slots on the main bracket LT 3700 Control Board Removal 1 Disconnect the front LVDS cable by pulling the cable from the connector Note The latc
38. hes are not spring loaded on the 37 inch model 2 Pull the small white ribbon cable straight out to remove it from the connector 3 Remove the three screws that secure the control board cover to the unit AIN a LI eS C ad 32 sv ty y Pla py PPM es ro p E an Ae JA Td Ic A I ESI AAA 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 i pa i EA AT AI TTE 5 E N S Shih IS EA 4 se S bk 6 Lift the board from the unit 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 67 LT4200 Control Board Removal 1 Disconnect the front LVDS cable by pressing in on the spring loaded latches on each side of the cable connector and then pulling 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 m Aether P je va di M Ben ne LE M ah A ban A ym Eds ECC la tn mina euren PE anc gl 3 T
39. ibbon cables from the connectors on the main TV chassis 6 Lift the board from the unit 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 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 69 Removing the Front Bezel To remove the front bezel remove the back cover then put the unit back on the stand as follows 1 Remove the stand 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 1nch 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 70 HP High Definition LCD TV Service Manual Diagnostics This section identifies potential service modes used for service along with their function and purpose This section also identifies error detection LEDs and error codes LED Indicators More than two I2C devices error Main board What is the special condition to watch out for with the following message Red LED blinking 2 sec interval Digital Demodulator does not respon
40. ic shock and do not touch the device circuitry when handling the LCD unit Because 2 HP High Definition LCD TV Service Manual 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 e Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart 1s used use caution when moving the cart apparatus combination to avoid injury from tip over Safe Handling and Servicing The work procedures shown with the Warning symbol are important for ensuring the safety of the product and the servicing work Be sure to follow these instructions e Before starting the work secure a sufficient workspace e Atall times other than when adjusting and checking the product be sure to turn off the Power button and disconnect the power cable from the power source of the TV during servicing e To prevent electric shock and breakage of PC board start the servicing work at least 30 seconds after the main power has been turned off Especially when installing and removing the power supply board and the SUS board which involve high voltages start servicing at least 2 minutes after the main power has been turned off e While the main power is on do not touch any parts or circuits other than the ones specified The high voltage power supply block within the LCD module has a
41. ital air channel 2 69 channel if current source is Cable channel 2 135 TV Skip a certain valid digital Combined with KDN channel major command Skip a certain valid digital Combined with KDJ channel minor command Year if time mode is manual 1990 2037 Month if time mode is manual 01 12 Hour 1f time mode is manual 00 23 Minute 1f time mode is manual 00 59 Day if time mode is manual 01 31 Control Hem Item Command Control Contents Time Zone wIz o wr IR RR I IR mn si APEC Alese le BE 12 e des le RE EEE APP PES Selec analog CC servia SE Le EN EI nn le Select digital CC service CR EEE Select a certain service 1 A serna 4 Sale Leis ie ia Ia PT sera a SE 1 snes mas mu me E DD ISRA ma ooo cbe Spanish All screen ES 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 ARES Effective for 4801 ENS Black 7 5 IRE HP High Definition LCD TV Service Manual 29 CAPTION LOCK Retain caption setting current setting at power off Default 0 Captions 1s always OFF at turn on CC Enable Disable during the power cycle STR_AUX_SOURC SOURCE AT P ON EN NOISE MUTE KEY LOCK RS 232 Commands Extensions for Professional Series HDTVs PWR MANAGE M G SELECT 0 7 selects number of
42. l 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 The installation menu allows you to change default setting values of current input audio and video modes For example to change the picture settings for a component input switch the TV source to component before entering this 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 gt Time 4 If the TV is NOT in Hotel mode press the following key sequences SAP MTS gt 1 gt 3 gt 5 5 If the TV is in Hotel mode change input source to AV2 then press SOURCE gt 1 gt 3 gt 5 Note Color adjustments in this menu apply to ALL modes Cool Standard or Warm If you want to adjust the color temperature of a single mode you will need to adjust the White Balance settings in the Factory Menu Color Adj Color Adj GE STD Value Note Each input group has the same values The same group of inputs have the same values Picture Adj meexb 1 qwe WW CA A e NN GG U Default values 0 100 o Be oi Default values 0 100 Sharpness Default values 0 100 By default the TV expects the black levels of all 4801 component inputs to be at O IRE Since some DVD players output component 4801 at 7 5 IRE this menu allows an installer to ch
43. lt Settings Reset J o LJ pq 24 HP High Definition LCD TV Service Manual 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 Set the RS 232c communications settings on the PC to match the TV s communication conditions The TV s communications settings are as follows Parity bit None Stop bit 1 bit Flow control CTS RTS The 7 byte command format uses a 3 byte command field and a 4 byte parameter field as follows CMD 1 CMD 2 CMD 3 PAR I PAR 2 PAR 3 PAR 4 Command Set COMMAND 3 bytes PARAMETER 4 byte CR Carriage Return atthe 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 value in the range specified under the Control Contents columns and x indicates any numerical value 66 52 Note The TV is expecting to receive the entire 8 byte string 3 byte command 4 byte command CR at once If you use a tool that sends a single character at a time like a Hyper terminal the TV will automatically return an error ERR signal Example T
44. m the main board d On the bracket with the VGA and RS 232 ports remove the 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 e Place the brackets and board on a flat surface e First install the bracket with the VGA and RS 232 ports This bracket fits on the inside of the black connector bracket e 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 You do not have to remove the main board to remove the power supply 56 HP High Definition LCD TV Service Manual 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 T to E e z We gt 2 e Bi a Main Board to KP and IR Speaker to Main Board 1 Detach all the cables connected to the power supply Inverter cables above HP High Definition LCD TV Service Manual 57 58 a in Inverter cables above The Master inverter cable connector is closer to the outside of the board Power supply to main board conne
45. may be splashed with water or where flammable materials surround it Do not install or use the product in a location that does not satisfy the specified environmental conditions This may damage the product and may cause a fire e Ifa foreign substance such as water metal or liquid gets inside the panel module immediately turn off the power Continuing to use the product may cause fire or electric shock e Ifthe product emits smoke or an abnormal smell or it makes an abnormal sound immediately turn off the power Continuing to use the product may cause fire or electric shock e Do not disconnect or connect the connector while power to the product is on It takes some time for the voltage to drop to a sufficiently low level after the power has been turned off Confirm that the voltage has dropped to a safe level before disconnecting or connecting the connector e Do not pull out or insert the power cable from or to an outlet with wet hands It may cause electric shock e Do not damage or modify the power cable It may cause fire or electric shock e If the power cable is damaged or if the connector is loose do not use the product this can lead to fire or electric shock e If the power connector or the connector of the power cable becomes dirty or dusty wipe it with a dry cloth Continuing to use the product may cause fire or electric shock e The LCD module uses a high voltage maximum 450V DC Be cautious of electr
46. module pe No Try power on with Y p Ve Yo en A m controller work gt p Repl ie LED Y e ye a for oder TV board LED works Na No No Y eek remate _ Ves Replace the bureris LU cx controller 2 and LED board Both work gt me OK Nu No Replace the remote Y controller and LET F Yes Source impul Wes OSD available gt i gt gt check Y T No Make input source E e pw Haute Ya Replace available and select C WB works dor gt pec LVDS cable OK ker T m i isule impii a d J y ie ek Pais T _ eis Keypad OK bait LL goin ic Yes Replace the LED Replace the MB id Na E Check reete Ves controller gt We Replace the batteries Na Y panel Replace the remit cositrolher HP High Definition LCD TV Service Manual 77 Audio 78 HP High Definition LCD TV Service Manual VGA Input HP High Definition LCD TV Service Manual 79 HDMI Input 80 HP High Definition LCD TV Service Manual DVI Input HP High Definition LCD TV Service Manual 81 YPbPr Input Em 82 HP High Definition LCD TV Service Manual TV Video S video Input HP High Definition LCD TV Service Manual 83 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 connec
47. n ine mern ee 42 Equipment and Tools Needed for Removal and Replacement oooooooooonononcccnnnnnnnnnnnnnnnonononononnnnncnnnnnnnononononnonannnnnnnss 42 HP High Definition LCD TV Service Manual iii iia SERVICE arcte di A A aen amaemheriannmaiaema 42 BASIC Aid US MENE Settinss en Ra A A ditto E rm rcu 42 Pour Models omiparisom PIES ed 43 A ae anna 43 LI OU ucciso E bene u se ee 43 O een 44 A P 44 Removal Proeedufes ua ee ne 45 AAA e o en mir ire 45 SCH WS ee se ee ae A O 45 Remosane the PEC SCA oasis rasa dd re 46 Disassembling the Pedestalva ns tdci 4 Remove thie Back A OWL en 48 REMOVING the Funcion Keyboard nn ee een 49 Remoyane the nitrated Di o 50 Remoymestic Wal Mount Brackets i mimo tias ar nu 51 R movine tlie eo TI r COVECE cada ea E ia indie ida 52 Re movanerthe Main Dose se o 52 Removing the Power Suppe o IR Get so cot m a ean fet A t n Cosi ae itas 56 Removine the Mali Brack 60 A O ono PO O a sei 61 Removans Me DEAR ne else iur 64 Remoyine the Contool BOSE serari plc locucion plado reset 66 Remove the BTON Beze lides email 70 ruin isle iia as 71 EPRD MA CAO eiii plain diras 71 SOL Ware Versi n MONA O een 71 lAs A a N EEE se Ju How to get back to normal TV operation after running diagnostics oooooooooncnccnnnnnnnnnnnnononononononannnnnnnnnnnnnnnnnnnnnnnnnnnanos 72 A iU Il NEM P I ey ev ONE qute ME E UCM Mi e
48. ndertaken any such broad evaluation 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 Warnings and Cautions WARNING Critical components having special safety characteristics are identified with a A by the reference number in the parts list 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 A A CAUTION To ensure the continued reliability of this product use only the original manufacturer s replacement parts which are listed with their part numbers in the Replaceable Parts List section of this service manual WARNING All ICs and many other semiconductors are susceptible to electrostatic discharges ESDs Careless handling during repair can be life threatening When repairing make sure that you are connected with the same potential as the mass of the set by a wristband with resistance Keep components and tools also at this same potential WARNING 1 Never replace modules or
49. nent remove all of the d excess solder Y AEN slice solder HP High Definition LCD TV Service Manual 3 e Special information for Pb free BGA ICs These ICs will be delivered in so called dry packaging to protect the IC against moisture and with the Pb free logo on it This packaging may only be opened shortly before it is used soldered Otherwise the body of the IC gets wet inside and during the heating time the structure of the IC will be destroyed from steam pressure If the packaging was opened before usage the IC has to be heated up for about 90 hours to dry Make sure you use ESD protection Suggested Pb Free Solder Several kinds of Pb free solder some shown in the following illustration are available for purchase This product uses Sn Ag Cu tin SN silver AG copper CU solder However Sn Cu tin SN copper Cu Sn Zn B1 tin SN zinc Zn bismuth Bi solder can also be used Servicing of Surface Mounted Devices SMDs A CAUTIONS General cautions on handling and storage e Oxidation on the terminals of SMDs results in poor soldering Do not handle SMDs with bare hands e Avoid using storage places that are sensitive to oxidation such as places with sulphur or chlorine gas direct sunlight high temperatures or a high degree of humidity The capacitance or resistance value of the SMDs may be affected by these conditions e Rough handling of circuit boards containing SMDs may cau
50. nition LCD TV Service Manual LT 4200 Inverter Removal 1 Remove the six screws that secure the inverter cover to the unit and then lift the cover up and off the unit o B 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 63 LT 4700 Inverter Removal 1 Remove the six screws that secure the inverter cover to the unit and then lift the cover up and off the unit 2 Disconnect the 15 cables from the connectors on the rear of the inverter board and the remaining three cables from the connectors on each side of the board Cable notes 15 total cables on each board 12 on back of board 1 on each side Pull the blue tabs straight out to disconnect the cables n m B a 7 a i 4 An m e er Fr gt YA i 32 DPI ds d ia I wes en E aS Pr gt B d z 2 Y NERIS a Son os I z TINN HM MESES LLLI LI u t Y rer A e a 11 We L y 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 t
51. nition LCD TV Service Manual 15 16 HP High Definition LCD TV Service Manual tal al allah ohh AAA 3 Connectors AV Input You can connect two sources of AV audio video input simultaneously The left column of ports is for Source 1 and the right column of ports is for Source 2 Each set consists of four ports AV Input e The yellow ports labeled Video connect single channel composite video which provides a sharper image than a coaxial RF connection e The adjacent red and white input ports labeled Audio connect the stereo audio soundtrack corresponding to composite or S Video connections The white port is for the left channel and the red port is for the right channel e 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 Component video 1s used by HDTV receivers as well as some 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 and the right column of ports for Source 2 HP High Definition LCD TV Service Manual 17 Component video cables transmit video in three channels Y Pb and Pr Some cables are five headed with three channels of video and two of audio
52. o DEREN u Time Zone _ p p o po ST po po ma ma 22 HP High Definition LCD TV Service Manual Time cont Daylight Saving On Active for Auto CE Po Sleep Timer Sas TT Capion Mode On III Off o Mute po Service Analog CCH OO po Texte pT Service Digital Service 1 po Service JJ J Z J po Service J A Z opo Servic jJ 5 po Service J 34 34 Do 5 Service 407 4 po Se FontSize efit opo po a o o Standart Larger po Font Style Default Style pS ylet iii pf Style pf Style pf Styled i Style oi Style i pf Style po Foreground Color X Defaut DD po ite A O O Yellow pf Magona yan J Background Color Defaut amp pf ite pS Green HP High Definition LCD TV Service Manual 23 Caption cont I Yeow A Magenta Cyan Foreground Opacity Default o Solid i Translucent oo Transparent pM Background Opacity Default Solid oo Translucent oo Transparent AAA po Edge Style JBDefaut Coo Edge Style po Edge Stylet po Edge Style Edge Style E Edge Style Ege Style X OSD Language English AA Spanish Frenh O o Setup Wizard p A mmw Stat O Input Labels pi AS A T NENNEN AVR EA DVD AA PVR AA CABLE AY DEC ESA a2 D VCE NENNEN Defau
53. o turn off the TV The command is PWRO_ _ CR which translates in Hex to the 8 byte command 50 57 52 30 20 20 20 OD HP High Definition LCD TV Service Manual 25 Control Item Control Contents Shifts TV to standby if it is in power on mode W l On Shifts TV to power on mode if it is in standby mode It switches input the sequence is TV Air Cable AV 1 AV2 YPbPr1 YPbPr2 VGA HDMII HDMI Input Select I N x xX Input terminal number 0 8 or 0 7 depends on HDMI3 AV mode election ap Panda B GI wm CI Me ON pori nen wA fern ee of FR emo Postion v p p po CTE iP SS hse Ja E TR o sie v js E FL femo 039 ca Je Fe fe LL mm me pn p pL monty 0 10 m pe o L L wem em E L Lee BE LE Eewme iP LLL oom moi T Tb E E en 277 0 LL Lo E eor 1 I HAE se DE LE poy Audio Selection A C H Analog Mono Digital ey _ Analog Sap Digital audio2 sap Digital audio2 Analog Stereo Digital audio3 Seep Tine s Lb Flip fe rp L L ma IT Timer Sonn 5 ma 5 L mn r ioMm 26 HP High Definition LCD TV Service Manual Control Item Control Contents hannel Direct The channel number of TV An input change is included if it 1 125 1s not TV display In air channel 2 69 are effective In cable channel 1
54. on LCD TV Service Manual 89 Connectors Main Board CN19 CN15 CN18 CN12 FEN Wan 2 a oO Q Ol TN SAT 0000 00000 00000 II 7 7 O a o a aa a onya 96 966090 o L e a Specification Description CN19 13 pins ROHS Power supply from power converter board CN114 a CNIS 28 pins ROHS LVDS output signal Between main board and panel CN12 11 pins ROHS Keypad and IR control connect to keypad board and IR board 90 HP High Definition LCD TV Service Manual Keypad and IR Boards CATAC Reus 1191 TY ER Se hl gs Fa fi E TH la y ULA Keypad Board IR Board 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 91 Wires and Cables Wiring Main Board B dm mom E dm AAA tft m mW oh m o Rm m Rh R E m E m B w a a a a a a i a LI p LI E E Input and output signal 92 HP High Definition LCD TV Service Manual Wiring Diagram T oo o m En 2 Di Main Board to KP and IR Speaker to Main Board HP High Definition LCD TV Service Manual 93 Firmware Update Procedure Overview Firmware updates are available for download from the HP Web site The updates consist of two files as follows e For the LT3200 and LT3700 The update LCD720 tgz and safe kernel img1 files e For the
55. ork on BA GN Anay BGA IES dida 5 Product Information and Specifications seeeeeeeecoocssssssseccceccccccccocosssesccccecccoccccsosssseesececcecocccsssssoseecececcececssssssssssse 6 Production A ec 6 Product PrO LIG iaa ica 6 SPC CUETO ALL ONG ee Een ee SA A AAA ee Nee 6 ECD Panel Module a ae 998 00 50 2 es esse 6 General 1 Y Specrticati ns LI NE ETS 400 3 co A ee lei 7 General TV Specifications 14200 ond LTA OO ae ae 9 TO COMME ONS EU UU MU 11 Factory Preset Display Modes asien 11 Controlime the Onscreen Lis Olay ren seen rien 12 IM Indicators and Controls reales 12 REMOS C ONO sisi roms E 13 TV OM it tai dis 14 A A MT T M 17 A O 20 DAD O O CU o ee Dale ee 20 OSD On Screen Display Functions Simplemenu cccoooooononononncnnnnnnnnnnnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 20 OSD bunctons e Et Mt kei 21 Command Table RS 2 D T H 25 Rore SS DE Sees oct ee tosiescue tuac E oi D USO ELO eodd 32 Special COMME a a A see 32 Replaceable PALES id EE Re eee a E ce Om db e deren dnbie Di ei aes 33 Darts By Mod ERA A tet er E ee ee ae LANI bz vere 33 Mod een 33 Mode FETS 700 mmm mmmmmmmmm mmmm mm mmmmmm mm mrrmrmrmrmmrmmrmmmmmmmmmmmmmmmm mmmmrmmmmmmmmmmmmmmmm m mmmmmmrmmmmmmmmmmmmmmmmmmmmmmmmmacym in 34 Model EI OO ee een 35 MOI ee De a te ee 36 Replacement Parts ist Reference Pers a a ce ba Cet tede bono DU INIM DE 37 Kemoval and Replacement esse ee
56. refer to the panel specification documentation in the Appendix 6 HP High Definition LCD TV Service Manual General TV Specifications LT3200 and LT3700 Model number LT3200 LT3700 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 l Viewing Angle 176 degrees 178 degrees Video Response Time 8 ms 6 ms Scalar Trident PX66 Trident PX66 Supported Input 4801 480p 720p 10801 1080p HDMI 4801 480p 720p 10801 1080p HDMI only only unin Yes Yes 3D Digital Comb Filter Video Noise Reduction Yes 3 2 Pull Down Yes Video HP Visual Fidelity Engine Yes enhancers Photorealistic Sharpness Enhancement Yes 3D Color Enrichment Yes Motion Adaptive Deinterlacer Yes Yes Audio Virtual Surround Sound Theater Music Hall Theater Music Hall AV In Component In YPbPr HDMI S Video In Antenna In RE 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 7 General TV ETT Continued Model mern number LT3200 1737000 00 OSD Languages en en Convenience a kn amp Ya eph wm e Favorite Channels ese me RR m amp mm w www Color Bezel and Stand Bezel and 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 A A General H W
57. rn value will be 0001 add 000 32 HP High Definition LCD TV Service Manual Replaceable Parts This chapter contains the service parts lists of each model Parts List by Model To see the pictures of the replaceable parts go to the Replacement Parts List Reference Picture section Model LT3200 Picture Number Part Description OEM Part Numbers HP Part Number 1 A E O EA 2 Stand neck assy 455587 001 Stand neck 42 3Y102 001 Repair screw kit 6K 3YISC 003 3 Power supply assy For 3x models 230W 455591 001 Power supply 3x model 56 04230 Q01 System board to power supply cable 50 3YJ02 001 4 Main Board assy 455593 001 Main board 91 3YW10 001G System board to power supply cable 50 3YJ02 001 Back cover bucket 60 3Y107 001 452092 001 Keypad Infrared assy 455604 001 Keypad buttons 60 3YJ03 001 Keypad PCA board 91 3YK10 003G Infrared board 91 3YK10 002G System board to keypad IR cable 50 3YJ03 001 3 EE 4520800 12 Inverter board 455596 001 Inverter board Master 27 D010279 Inverter cable 50 3Y102 001 13 Control board 455600 001 Control board 35 D013932 LVDS cable 50 3Y101 001 E O POE gt A Remote control 5188 6301 90 3Y126 001 452113 001 EN Cable clamp 38 05031 001 452127 001 Repair screw kit 34 37P06 001 452128 001 86 00G29 668 86 1A334 6R0 86 1A336 6R0 86 1H524 8R0 86 RA324 100 86 VA314 6R0 86 VA326 100 86 9A338 150 86 1A526 100 HP High Definition LCD TV Service
58. se 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 may be damaged due to the stress e 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 4 HP High Definition LCD TV Service Manual Removal of SMDs 1 Heat the solder for 2 to 3 seconds at each terminal of the chip By means of soldier wick and a slight horizontal force small components can be removed with the soldering iron They can also be removed with a solder sucker A 2 While holding the SMD with a pair of tweezers take 1t off gently using the soldering iron s heat applied to each terminal B 3 Remove the excess solder on the solder lands by means of soldier wick or a solder sucker C VACUUM PISTON SOLDERING RON e g WELLER SOLDER TIP PT H7 SOLDERING TRON SOLDER WICK e g APAIR OF TWEEZERS HEATING 4 it HEATING SOLDERING TRON SOLDER WICK e When handling the soldering iron use suitable pressure and be careful e When removing the chip do not use undue force with the pair of tweezers e The soldering iron to be used approx 30 W should preferably be equipped with a thermal control soldering temperature 360 to 380 C
59. the process of removing the component from the PWB and replacing it with a new component If an LF BGA is removed from a PWB the solder balls of the component 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 the PWB To do this we recommend that the board is heated until it is certain that all the joints are molten Then carefully pull the component off the board with a vacuum nozzle For the appropriate temperature profiles see the IC data sheet Area Preparation When the component has been removed the vacant IC area must be cleaned before replacing the LF BGA Removing an IC often leaves varying amounts of solder on the mounting lands This excessive solder can be removed with either a solder sucker or solder wick The remaining flux can be removed with a brush and cleaning agent After the board is properly cleaned and inspected apply flux on the solder lands and on the connection balls of the LF BGA NOTE Do not apply solder paste as this has shown to result in problems during resoldering Device replacement The last step in the repair process is to solder
60. tion are the following procedures and illustrations Removing the TV Pedestal Disassembling the Pedestal Removing the Back Cover Removing the Function Keyboard Installing the Keyboard PCA Removing the Infrared Board Removing the Wall Mount Bracket Removing the Board Cover Removing the Main Board Removing the Power Supply 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 n 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 45 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 2 mad LA AL 2714 m E HHEEEEEEE iiih 11 1111111111111 p I DIN SII LII LUE 7177777 UEN 41 1414104 I riogh a also s gma L i HERELCSIT Remis D ET i L NR RE La 4 Care
61. tions This mode blocks some remote buttons and TV functionality including the MENU and FAV buttons HP High Definition LCD TV Service Manual 73 How to enable and disable TVs are delivered to hotels in normal mode To access the installation menu 1 Run the Setup wizard or channel scan and time setup through the main 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 gt Time 4 Press the following key sequences SAP MTS gt 1 gt 3 gt 5 To return to normal mode from Hotel mode 1 On the remote press the Menu button 2 From the OSD select Setup gt Time 3 Change input source to AV2 and then press SOURCE gt 1 gt 3 gt 5 74 HP High Definition LCD TV Service Manual Troubleshooting Remote Control HP High Definition LCD TV Service Manual 75 Function Key T YES 76 HP High Definition LCD TV Service Manual Power TV Does Not Turn On Check AC N sel Make the AC power power source Ty alie T Yer Check AC input No ge Replace the power I efPSU A conl Yes gt Ye Try power on wiih wi SV Standby Be remote controller ws Y Ya Boch work s ud Replace the LED Ts the LED indicator ha gt Nis Blue gt Ho Y aig Replace ihe LED Remoto OK but Yes M esa aos i Sul M YF ders no
62. tor connected No Video Is there an input source connected Is the LED on o Check the main board and panel cable connection o Is the power on o 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 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 No Display Check the main board inverter board and panel board Display Noise 1 Check the cable between the main board and the control board 2 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 84 HP High Definition LCD TV Service Manual LED Display abnormal The front panel LED uses the following blinking patterns to indicate failures Blink Frequency Failure Part LCD Panel Troubleshooting Tips Inverter board Power board to panel inverter board left right Problem
63. urn power on or place TV into standby mode SAP MTS Turn secondary audio program on and off Select audio mode Voice Music Standard User Picture Select video mode Vivid Standard Movie or User Source Display list of input source Menu Open and exit OSD menu Arrows Move cursor left right up down in the OSD menu or adjust a selected item OK Choose the current menu option Aspect Change the image aspect ratio Go up one menu level when the OSD is displayed Info Display channel information about your current TV program Fav Shows Favorite channel list and allows adding current channel to the list and allows replacing one from the list with current channel 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 13 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 FRFFFPFFFEEIN g es o Oe C gt E E 3 z A 4 A A A Ww 4 y 4 Se 7 POWER MEAL SELECT SOURCE 14 HP High Definition LCD TV Service Manual A ma HP High Defi

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