These dip pins frequencies operated in the 300 400 mhz range.
How to check frequency of garage door opener.
How to change the frequency for a garage door opener.
Look for a small black button behind the lens light of the head receiver on the door opener near the antenna.
First plug the garage door opener into an outlet in the house using an extension cord.
Point your door opener remote toward the head receiver two feet or closer and press.
Test the operation of the garage door using the transmitter.
Double check it to make sure it is correct.
This was accomplished by sliding each of the nine dip pins into matching position on the opener and the remotes.
We just bought a house with old garage door openers and the previous owners had long since lost their remotes.
Snap the cover back on the back of the transmitter.
Next you will need to shut power to the garage off with your circuit breaker.
Next you ll test the range on your remote controls to see if it improves.
The openers are old stanley v 76 models with 8 dip switches on the receiver.
Press and hold this button.
Align the 12 dip switches in exactly the same pattern as you have written on paper.
If you got the dip switch positioning correct the garage door motor will turn on.