Schematic for a Chamberlain 5200 HBC garage door opener
Greetings ... my background is electronics and I need a schematic for the main control board in the garage door opener. I wrote them requesting same and of course got the "old get lost I don't care if you buy another product from us attitude". I know the remote control is working as I can trace it to the output pin of an LM2902 and I know it is getting to the micro but it will not operate the door up down relay so that is why I need a schematic.
Any help would be greatly appreciated ... thanks in advance and take care ...Vic
As in all industries that order control boards from outside vendors, the vendor does not provide schematics and are kept secret as proprietary information.
I have never discovered a way to get the manufacturer of these control boards to release a copy. The only solution is to order a replacement.