Home Forums General Discussion Technical Questions Dover Oildraulic 1982 not opening door

Jump the door open button and use your meter on the logic rack, black lead in SC. To get OD output, you should read 5v to OD test point on power board and 5 v at IN not (1X) and 0v at PCP (1-1) if IN not or PCP are in the wrong state there is something wrong with an IN2 relay contact. If those are all right then you need a new power board. If OD read 0 v, go to the door board, DO not test point needs to read 0v, DOL not (pin2-11) has to read 5v and DZ (pin 2-K) reads 5v. If DO not read 5 v make sure DOB not is at 0v (2-6) and ULD is at 5v (2-R)