{"product_id":"liftmaster-k41-0390-000","title":"LiftMaster K41-0390-000 EMI Board — MAXUM700 \/1200,480VAC","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster K41-0390-000 is the EMI-board service reference identified for documented480VAC MAXUM operator configurations, including the 700 and 1200 families in the supplier description. It is distinct from K41-0391-000 for120\/240VAC equipment, the main control board and the toroidal transformer. Match the full operator model and actual supply version before ordering. An EMI board is one stage of the electrical system; a dead operator does not establish that this board alone is the failed component.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMAXUM configurations specifying K41-0390-000\u003c\/td\u003e\n\u003ctd\u003eConfirm exact model and 480VAC supply.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e120\/240VAC operators\u003c\/td\u003e\n\u003ctd\u003eUse their separate EMI-board reference.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain control or motor-drive boards\u003c\/td\u003e\n\u003ctd\u003eDifferent components and repair scope.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eToroidal transformer\u003c\/td\u003e\n\u003ctd\u003eSeparate service item.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOlder gate EMI boards\u003c\/td\u003e\n\u003ctd\u003eNo interchangeability from EMI terminology alone.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eIdentify the Failed Electrical Stage\u003c\/h2\u003e\u003cp\u003eRecord the complete MAXUM operator label, supply configuration and installed board number before ordering. Have qualified personnel inspect the incoming circuit, protective components, connections and downstream electronics. A power symptom can originate at more than one stage. Preserve fault information and inspect for damaged wiring or moisture instead of replacing an EMI board solely because the operator is unresponsive. Include the installed transformer and rectifier references in the service record so adjacent electrical stages remain clearly identified during diagnosis.\u003c\/p\u003e\u003cp\u003eUse the exact model’s electrical drawing and supplied service instructions. Similar board names do not establish matching terminals or voltage requirements. Do not transfer connectors from a different supply version or treat the board as a whole-operator conversion between480V and120\/240V. After repair, restore grounding, wiring protection and covers and complete the required startup, travel and safety tests before returning the door to use.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eK41-0390-000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eEMI board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical version\u003c\/td\u003e\n\u003ctd\u003e480VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplier platform description\u003c\/td\u003e\n\u003ctd\u003eMAXUM700 \/1200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDifferent supply version\u003c\/td\u003e\n\u003ctd\u003eK41-0391-000 \/120–240VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelection basis\u003c\/td\u003e\n\u003ctd\u003eExact model, board revision and circuit diagram\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRecord full MAXUM model and supply version.\u003c\/li\u003e\n\u003cli\u003eConfirm K41-0390-000 and 480VAC configuration.\u003c\/li\u003e\n\u003cli\u003eInspect connections and diagnose the failed power stage.\u003c\/li\u003e\n\u003cli\u003eMatch delivered board revision and required final electrical checks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThis offer identifies the K41-0390-000 EMI board. A main board, transformer, rectifier, motor assembly, complete harness, electrical enclosure and supply-conversion kit are not promised as included. Confirm current supplied mounting or connection pieces with the package. The operator drawing lists these electrical stages separately; replacing one board does not establish that every component affected by a supply fault or surge has been renewed.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING:480VAC operator service exposes hazardous electrical energy. Use qualified electrical and commercial-door personnel.\u003c\/li\u003e\n\u003cli\u003eDisconnect and secure all applicable supplies before board or wiring work. Follow the exact operator service procedure.\u003c\/li\u003e\n\u003cli\u003eNever substitute the120\/240V board or improvise voltage connections. Preserve grounding and protective devices.\u003c\/li\u003e\n\u003cli\u003eRestore covers and verify normal control, travel, reversal and required protection before normal operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-photocell-kit-indoor-only-for-30-wide-openings\"\u003eCPS-U monitored photo eyes\u003c\/a\u003e — separate protection devices for approved commercial-door controls; match the operator and environment.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-extended-duty-trolley-operator\"\u003eTDC12X1BMC MAXUM trolley operator\u003c\/a\u003e — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs this the120\/240V version?\u003c\/h3\u003e\u003cp\u003eNo. K41-0391-000 is the separate supply-version reference.\u003c\/p\u003e\u003ch3\u003eIs the transformer included?\u003c\/h3\u003e\u003cp\u003eNo. It is a separate component.\u003c\/p\u003e\u003ch3\u003eDoes EMI mean a universal interference filter?\u003c\/h3\u003e\u003cp\u003eNo universal replacement application is established; match the exact service reference.\u003c\/p\u003e\u003ch3\u003eWill it fix every dead operator?\u003c\/h3\u003e\u003cp\u003eNo. The full incoming and downstream circuit needs diagnosis.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"Controlled products","offers":[{"title":"Default Title","offer_id":60723536232734,"sku":"K41-0390-000","price":125.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/k41-0390-000.png?v=1793245039","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-k41-0390-000","provider":"garage-doorparts.com","version":"1.0","type":"link"}