[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-647533-105":59,"doc-detail-647533-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","led-tv-service-manual-chassis-ua62f-model-75uh6550-75uh6550-ub","LED TV - Service Manual - Chassis UA62F - Model 75UH6550 75UH6550-UB","","LED TV service manual for chassis UA62F, covering model 75UH6550 and 75UH6550-UB. The document provides safety precautions for servicing, including isolation transformer guidance, correct replacement of special safety components, and cautions on fuse and high-wattage resistor handling. It explains AC leakage current cold and hot checks using specified measurement setups and acceptable resistance/voltage limits, emphasizing shock hazard prevention. It also lists general servicing precautions like unplugging before disassembly, proper high-voltage measurement, and safe contact cleaning instructions.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/led-tv-service-manual-chassis-ua62f-model-75uh6550-75uh6550-ub/647533/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/led-tv-service-manual-chassis-ua62f-model-75uh6550-75uh6550-ub/647533.png","ImageObject",300,407,{"name":92,"@type":93},"Elsa","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-12","2026-10-23",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the key safety requirement before servicing this TV chassis?","Question",{"text":112,"@type":113},"Read and follow the safety precautions in the manual before servicing the chassis. Replace special safety-related components only with the same components recommended in the manual.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is the AC leakage current cold check performed?",{"text":117,"@type":113},"Remove the AC plug from the source, jumper the two plug prongs, switch on, then measure resistance from the AC plug prongs to exposed metallic parts. Acceptable results are 1 MΩ to 5.2 MΩ when there is a return path, and infinite when there is no return path.",{"name":119,"@type":110,"acceptedAnswer":120},"What limits apply during the leakage current hot check?",{"text":121,"@type":113},"Connect the TV directly to the AC outlet, place a specified resistor/capacitor network between earth ground and exposed metallic parts, and measure AC voltage. Any measured value must not exceed 0.75 volt RMS (corresponding to 0.5 mA); otherwise the set must be checked and repaired before returning to the customer.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},647533,1793130655,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":52,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},137455077381,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Internal Use Only  \nLED TV  \nSERVICE MANUAL  \nCHASSIS : UA62F  \nMODEL : 75UH6550 75UH6550-UB  \nCAUTION  \nBEFORE SERVICING THE CHASSIS,  \nREAD THE SAFETY PRECAUTIONS IN THIS MANUAL.  \nP/NO : MFL69460606 (1603-REV00)  \nCONTENTS  \nCONTENTS .............................................................................................. 2  \nSAFETY PRECAUTIONS ........................................................................ 3  \nSERVICING PRECAUTIONS ................................................................... 4  \nSPECIFICATION ...................................................................................... 6  \nADJUSTMENT INSTRUCTION .............................................................. 13  \nBLOCK DIAGRAM.................................................................................. 25  \nEXPLODED VIEW .................................................................................. 34  \nASSEMBLY / DISASSEMBLY ............................................................... 35  \nSCHEMATIC CIRCUIT DIAGRAM ........................................... APPENDIX  \nTROUBLE SHOOTING GUIDE ................................................ APPENDIX  \nCopyright ©  LG Electronics. Inc. All rights reserved. -2- LGE Internal Use Only Only for training and service purposes  \nSAFETY PRECAUTIONS  \nIMPORTANT SAFETY NOTICE  \nMany electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by  in the Schematic Diagram and Exploded View.  \nIt is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock, Fire, or other Hazards.  \nDo not modify the original design without permission of manufacturer.  \nGeneral Guidance  \nAn isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.  \nIt will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.  \nIf any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.  \nWhen replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.  \nKeep wires away from high voltage or high temperature parts.  \nBefore returning the receiver to the customer,  \nalways perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals, etc. , tobe sure the set is safe to operate without damage of electrical shock.  \nLeakage Current Cold Check(Antenna Cold Check)  \nWith the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc.  \nIf the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 MΩ and 5.2 MΩ .  \nWhen the exposed metal has no return path to the chassis the reading must be infinite.  \nAn other abnormality exists that must be corrected before the receiver is returned to the customer.  \nLeakage Current Hot Check (See below Figure)  \nPlug the AC cord directly into the AC outlet.  \nDo not use a line Isolation Transformer during this check.  \nConnect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between a known good earth ground (Water Pipe, Conduit, etc. ) and the exposed metallic parts.  \nMeasure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity.  \nReverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metal","cbCainMcsTf2PInD","https://ap.wps.com/l/cbCainMcsTf2PInD","pdf",10561810,139,"English","# Contents\n## Safety precautions\n## Servicing precautions\n## Specification\n## Adjustment instruction\n## Block diagram\n## Exploded view\n## Assembly / Disassembly\n## Schematic circuit diagram\n## Troubleshooting guide","[{\"question\":\"What is the key safety requirement before servicing this TV chassis?\",\"answer\":\"Read and follow the safety precautions in the manual before servicing the chassis. Replace special safety-related components only with the same components recommended in the manual.\"},{\"question\":\"How is the AC leakage current cold check performed?\",\"answer\":\"Remove the AC plug from the source, jumper the two plug prongs, switch on, then measure resistance from the AC plug prongs to exposed metallic parts. Acceptable results are 1 MΩ to 5.2 MΩ when there is a return path, and infinite when there is no return path.\"},{\"question\":\"What limits apply during the leakage current hot check?\",\"answer\":\"Connect the TV directly to the AC outlet, place a specified resistor/capacitor network between earth ground and exposed metallic parts, and measure AC voltage. Any measured value must not exceed 0.75 volt RMS (corresponding to 0.5 mA); otherwise the set must be checked and repaired before returning to the customer.\"}]","LED TV - Service Manual - Chassis UA62F - Model 75UH6550 75UH6550-UB | PDF",1792789202,350]