LiftMaster K41-0390-000 EMI Board — MAXUM700 /1200,480VAC
LiftMaster K41-0390-000 EMI Board — MAXUM700 /1200,480VAC
The 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.
Compatibility — Models, Versions and Exclusions
| Model or selection point | Compatibility requirement |
|---|---|
| MAXUM configurations specifying K41-0390-000 | Confirm exact model and 480VAC supply. |
| 120/240VAC operators | Use their separate EMI-board reference. |
| Main control or motor-drive boards | Different components and repair scope. |
| Toroidal transformer | Separate service item. |
| Older gate EMI boards | No interchangeability from EMI terminology alone. |
Identify the Failed Electrical Stage
Record 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.
Use 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.
Specifications and Product Identification
| Specification | Details |
|---|---|
| Part number | K41-0390-000 |
| Product | EMI board |
| Electrical version | 480VAC |
| Supplier platform description | MAXUM700 /1200 |
| Different supply version | K41-0391-000 /120–240VAC |
| Selection basis | Exact model, board revision and circuit diagram |
Before Ordering
- Record full MAXUM model and supply version.
- Confirm K41-0390-000 and 480VAC configuration.
- Inspect connections and diagnose the failed power stage.
- Match delivered board revision and required final electrical checks.
Package Contents and Separate Requirements
This 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.
Safety Warnings — Read Before Installation or Service
- WARNING:480VAC operator service exposes hazardous electrical energy. Use qualified electrical and commercial-door personnel.
- Disconnect and secure all applicable supplies before board or wiring work. Follow the exact operator service procedure.
- Never substitute the120/240V board or improvise voltage connections. Preserve grounding and protective devices.
- Restore covers and verify normal control, travel, reversal and required protection before normal operation.
Related Products and Important Differences
- CPS-U monitored photo eyes — separate protection devices for approved commercial-door controls; match the operator and environment.
- TDC12X1BMC MAXUM trolley operator — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.
Frequently Asked Questions
Is this the120/240V version?
No. K41-0391-000 is the separate supply-version reference.
Is the transformer included?
No. It is a separate component.
Does EMI mean a universal interference filter?
No universal replacement application is established; match the exact service reference.
Will it fix every dead operator?
No. The full incoming and downstream circuit needs diagnosis.
Need Help Confirming the Right Product?
Contact Garage-DoorParts.com before ordering. 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.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
Shipping & Returns
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We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.