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The circuit diagram outlines the high-voltage input stage, the T801 transformer configuration, and the secondary output sections providing various voltage rails. The schematic captures critical component values, including capacitors, resistors, and diodes such as the BYV95C, and illustrates the isolation between the 'HOT' and 'COLD' sections of the board. Designed for electronic repair and circuit analysis, the document maps out the pin connections for the TDA8138 regulator, the optocoupler feedback loop (LTV-817C), and various peripheral control transistors. It is an essential technical reference for engineers or technicians involved in the maintenance of MC-64 chassis-based electronic equipment, offering precise details on component placement and electrical connectivity within the power management circuitry.",{"@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":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/str-s5707-power-supply-schematic-circuit-diagram/561089/",{"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/str-s5707-power-supply-schematic-circuit-diagram/561089.png","ImageObject",300,407,{"name":92,"@type":93},"Stanley","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":19},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the primary controller used in this SMPS circuit?","Question",{"text":112,"@type":113},"The primary controller identified in the schematic is the STR-S5707 power IC.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What is the purpose of the optocoupler 1804 (LTV-817C) in the circuit?",{"text":117,"@type":113},"The optocoupler serves as a feedback mechanism, bridging the 'HOT' and 'COLD' sections to maintain voltage regulation for the output stages.",{"name":119,"@type":110,"acceptedAnswer":120},"Which components are critical for the AC input protection?",{"text":121,"@type":113},"The input stage includes an F4AH 4A 250V fuse, a line filter (LF-20A1), and associated suppression capacitors for safety and noise reduction.","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},561089,1792079016,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":19,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":14,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":24},2336477405376,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","a21  PL8OI22T80LF801PB01SM801T4HD802本I    250V    AC-ININDONESIA!IN4148     章Be01⑨压③Mm◎全B68e₂,THB01031/4124024KYC833 063/8311606 ★T802151-B06L901盟⑨J119    SMPS TRANS   ④PB02ST-26VBB而TOIC840885亲₅4FR804Δ中1DG COIL91KYST5Vu78059IN500VC8十50V②R823 5.6K/0.5W              .行平CB40B6D805C9290.OpoRTo而工899302TVR06JB500V0AIV16V9Da10EU1Z 1KV  8.81J112L02⑧VDDCHOKE09P60.g-0.1T90PGm不  \n翻  \n一W一  \n# (U-COM OPTION)\n\n而  \nONLY  \n\n| NO   | C-NO   | MITS-8ISH   | LGS   |\n| --- | --- | --- | --- |\n| 1   | ICO1   | LG8534   | LG8634   |\n| 2   | ZD01/02/03   | TIN WIFE   | 7.5V ZENER   |\n| 3   | C11   | 24P CC   | 10P CC   |\n| 4   | R05   | PD 130   | RD 91   |\n| 5   | R314   | FD 12K   | FD 20K   |\n\n2.0LB01IH2WF-COF  \n盖  \nww  \nt息tto  \n卒工  \nUt  \nk20  \nC35Y 0.40*  \nSTAPT-U8  \nPB5年D812TVR06J4.7K一⑦cDB96L804F-COFE4。BPxP830★0.68SCLW208⑥say15  ǒ成E  0.5Wa.0GODPSDAW-⑤SDALB3PB252020.5w⑥回Whe108189052W44432.GEmATC42020kC.250V     29026Y0.9EmRB181806  \n中  \nW  \nE  \n0.33  \nB+  \nLATDH  \nR824   8.5W   181W      \nw1  \nCONV/OFF           R421           33³PB177.g9-Ve33V  ONOFF1K2R804W-0.5W    33KQ⁸02 C3202YIC801平4凭3198G▲4N35GV7.ICB02STR-S570750V市0804B⁸05本C3198Y3.9红  \nW一  \nW  \nMC-64ASHASSIS  \n▲","cbCaiv0Vynpn7y86","https://ap.wps.com/l/cbCaiv0Vynpn7y86","pdf",165503,"English","# Power Supply Circuit Overview\n## Primary (HOT) Section\n## Secondary (COLD) Section\n## Control and Regulation Components","[{\"question\":\"What is the primary controller used in this SMPS circuit?\",\"answer\":\"The primary controller identified in the schematic is the STR-S5707 power IC.\"},{\"question\":\"What is the purpose of the optocoupler 1804 (LTV-817C) in the circuit?\",\"answer\":\"The optocoupler serves as a feedback mechanism, bridging the 'HOT' and 'COLD' sections to maintain voltage regulation for the output stages.\"},{\"question\":\"Which components are critical for the AC input protection?\",\"answer\":\"The input stage includes an F4AH 4A 250V fuse, a line filter (LF-20A1), and associated suppression capacitors for safety and noise reduction.\"}]","STR-S5707 Power Supply Schematic - Circuit Diagram | PDF",1791804980]