[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-562960-105":59,"doc-detail-562960-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","zd-939-digital-hot-air-smd-rework-station-circuit-diagram","ZD-939 Digital Hot Air SMD Rework Station - Circuit Diagram","","This technical document provides the circuit schematic and component layout for the ZD-939 digital hot air SMD rework station. The documentation includes detailed connectivity for core components such as the HT1621 LCD driver and C8051F310 microcontroller, illustrating pin assignments for PWM, digital input/output, and power management. It outlines essential board-level circuitry, including voltage regulation, signal conditioning with LM358 operational amplifiers, and interface headers. This technical schematic serves as a comprehensive reference for engineering analysis, repair, and hardware development of the ZD-939 system. It covers signal paths for temperature control, buzzer alerts, and interface management, providing a structured overview of the hardware architecture of the unit as of its 2006 design release.",{"@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/zd-939-digital-hot-air-smd-rework-station-circuit-diagram/562960/",{"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/zd-939-digital-hot-air-smd-rework-station-circuit-diagram/562960.png","ImageObject",300,407,{"name":92,"@type":93},"dawugda","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-15","2026-10-12",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the primary function of the ZD-939 circuit board?","Question",{"text":112,"@type":113},"The ZD-939 is a digital hot air SMD rework station designed for precision electronic component soldering and desoldering.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which microcontroller is utilized in this design?",{"text":117,"@type":113},"The design incorporates the C8051F310 microcontroller for system control and processing.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the role of the HT1621 component in the system?",{"text":121,"@type":113},"The HT1621 serves as a dedicated LCD driver, responsible for managing the display output on the rework station.","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},562960,1792035940,{"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":14,"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},3985747870947,"https://ap-avatar.wpscdn.com/davatar_3d24733baf745e90a7e4bdd5f77d97b2","U2 HT1621  \nU1 C8051F310PO,DVREFP2.0P0.1P2.18 KEYO二  \n\n|  | SEG7  \u003Cbr>SEG8  \u003Cbr>SEG9  \u003Cbr>SEG6  \u003Cbr>SEG10  \u003Cbr>SEG5  \u003Cbr>SECH  \u003Cbr>SEGI1  \u003Cbr>SEG3  \u003Cbr>SEG12   \u003Cbr>SEG13  \u003Cbr>SEG2  \u003Cbr>SEG14  \u003Cbr>SEG1  \u003Cbr>SEGo  \u003Cbr>SEG15  \u003Cbr>SEG16  \u003Cbr>SEG17  \u003Cbr>SEG18  \u003Cbr>SEG19  \u003Cbr>DATA  \u003Cbr>SEG20  \u003Cbr>VSS  \u003Cbr>SEG21  \u003Cbr>OSCO  \u003Cbr>SEG22一  \u003Cbr>OSCI  \u003Cbr>SEG23  \u003Cbr>VLCD  \u003Cbr>SEG24  \u003Cbr>SEG25  \u003Cbr>SEG26  \u003Cbr>SEG27  \u003Cbr>BZ  \u003Cbr>SEG28  \u003Cbr>COM0  \u003Cbr>COMI  \u003Cbr>SEG29  \u003Cbr>SEG30  \u003Cbr>COM2  \u003Cbr>SEG31  \u003Cbr>COM3   |  |\n| --- | --- | --- |\n|  |  |  |\n|  |  |  |\n|  |  | 一   |\n|  |  | 一   |\n|  |  | —   |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n|  |  |  |\n| +5V   |  |  |\n|  |  |  |\n|  |  |  |\n|  |  | 28 Y4   |\n|  |  | 27Y3二   |\n|  |  | 26 Y2   |\n| COM324   |  | 25YI   |\n|  |  |  |\n\nP0.4/TXDP0.5/RXDP2.3P0.6/CNVSTP2.4华  \nLCD  \nP0.7P2.5一26KEY14RBBRAER8门P10P2.7—iokJ5DOW2PL1KEYOL0PL2 P3.0WC2D一6 C2DATKEY02KEY03二PL3P3.1—7 CSIUPKEY04ToSWITCHO 22  PL48 CS0SWITCHI 21P1.5P3.3—9 WRWORK0二WORKIPL610 DAT—PL.7PWM0  32C2CK/RST5 C2CKP0.2/XTALIPWM31VCCP0.3/XTAL2 GND  \n42Y18  7  Y7 Y82Y8  \nP2.6一  \n17 Y13二  \nP3.2—  \n34   cOM3      YI5一  \nP3.4—  \nCOM23 COM2 Y16  I3YI6二  \n8MiY18  \nPs I量J2J-EXTC4C5RAI IK100mlufSWITCHOCAIJP2A100n  \n560KRA31oKU3ALM358RARAZTEMPO二CA2CAE10K10K0m/00DAIZDA2IN+148IN4148  \nEAI10ufRA  \nA5  \n20KVRA6K3VOL12VD278L05VinVout挚宁R2IN⁰0JI当GND100n03nEyL10ufTL4313PINDL卓品二C2  \nATHODE  \nIND  \n\n| Tile   |  |  |\n| --- | --- | --- |\n| Size  \u003Cbr>A4   | Number   | Revision   |\n| 12-Dee-2006  \u003Cbr>Sheet of  \u003Cbr>Date:二   |  |  |\n| E电子线路新产品线路板ZD-917BACKDRavli BDB  \u003Cbr>File:   |  |  |\n\n100nIN4007去4  \ns2:  \n2zzodm0342二  \n1Nag?5V155C330uf 25W5W15SC  \nghm sw品HA17358  \n□Ax10  \nkliz鸳  \nDIAK C502cz6  \n二  \n220k 5W7k昭  \n\n| Hot air SMD rework station   |  |  |\n| --- | --- | --- |\n| ,   | ZD-939   | korm   |\n| 1068   |  |  |\n\n# Model:ZD-939 Digital","cbCaijDj1ckM0ISE","https://ap.wps.com/l/cbCaijDj1ckM0ISE","pdf",926872,"English","# Circuit Schematic Analysis\n## Control System\n## Power Management\n## Interface and Peripheral Connections","[{\"question\":\"What is the primary function of the ZD-939 circuit board?\",\"answer\":\"The ZD-939 is a digital hot air SMD rework station designed for precision electronic component soldering and desoldering.\"},{\"question\":\"Which microcontroller is utilized in this design?\",\"answer\":\"The design incorporates the C8051F310 microcontroller for system control and processing.\"},{\"question\":\"What is the role of the HT1621 component in the system?\",\"answer\":\"The HT1621 serves as a dedicated LCD driver, responsible for managing the display output on the rework station.\"}]","ZD-939 Digital Hot Air SMD Rework Station - Circuit Diagram | PDF",1791810211]