Where can I find a schematic diagrams for an edco garage door opener

Try these resources:
Wiring garage door opener model 139 53990D ShopYourWay
fix garage door opener wiring Sears PartsDirect

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

There maybe a reset on it, You would have to have a schematic of circuit board. Check the manufacturer website, they may have it posted or maybe a parts diagram.

Wiring diagrams haven't been available for openers in years. If you are having a problem why don't you post it along with the make and model number and we will help you fix it.

Wiring diagrams have never been available. What is your problem?

There are no schematics available for garage door openers. Post your problem and we may be able to help.

The manufacturer has never put out a schematic for these things so the only test is if it works or not. It became cheaper to replace rather than repair many years ago. It would be fun though if the information was around.

If you are looking for a schematic diagram they are not available.

If you are looking for a schematic for a garage door opener receiver there are none available.

http://www.chamberlain.com/corporate/en-us

Enter your model # and you can download the users and install manuals. hope this helps

Remove the cover and I am sure you will find the gear is stripped. The part number for the gear is 41A2817 and is available at Sears or any garage door service company. It comes with instructions.