I have two remotes for a Genie model 880 (ancient) garage door opener. The thing looks like it's from about 1970. Neither one of the remotes work reliably for opening the garage door, but both will work if I try a couple times, and I have only been able to get the door to close once with either of them (I just moved in a couple months ago, and before today I had only tried the remotes a couple times before today).
I opened one of them up, hoping to find a dead battery or a loose button connection, only to find both of them fully functional. I did, however, notice that there appeared to be a resistor(?) missing on the PCB. I opened up the other remote, and found the same open connection, plus another resistor missing (R5)! I've been trying to debug the circuit with my cheapo DMM, but I don't have any other lab equipment handy on the weekend.
Is anyone familiar with these types of garage door openers? I drew up a schematic of the PCB. R6 is the missing resistor, and R5 is missing on the second remote.
I opened one of them up, hoping to find a dead battery or a loose button connection, only to find both of them fully functional. I did, however, notice that there appeared to be a resistor(?) missing on the PCB. I opened up the other remote, and found the same open connection, plus another resistor missing (R5)! I've been trying to debug the circuit with my cheapo DMM, but I don't have any other lab equipment handy on the weekend.
Is anyone familiar with these types of garage door openers? I drew up a schematic of the PCB. R6 is the missing resistor, and R5 is missing on the second remote.
Attachments
-
197.6 KB Views: 98