Home Forums General Discussion Technical Questions Dover 4 slot questions

Have a 4 slot down. No print. Originally it would run to floor and not open. Changed door board and power board. But now am blowing two fuses all the way on the right off the transformer.
Any help world be great thanks

Which fuses? Did you check to see if you have 300vdc coming from the rectifier for doors before. Fuse 5&6 i believe feed.

5 and 6 are good. 7 and 8 keep blowing. Im leaning toward rectifier number one.

Also i poped out. All the cards and still blowing.

Is there a rear opening? Easy enough to check the diodes with your meter.

The isnt a rear opening

Do the doors open and close when you push the DO or DC relays in? When the car stopped and didn't open the doors, did the DO relay come in and did the DC relay drop??

It didnt. When it was having trouble before the fuse issue. I would press in do relay. And close would pull back in. Also. Manually open the door. It would only close. If i break safety edge. Door would just stop. Not reopen also

You might look at your micro switches in the door operator and your resistors in the COP.

7&8, dont that feed the rectifier? you have correct dc out?

Its was i believe 340 ish. I believe my general print is also incorrect. I will post it. It. But i divorced everything in the circuit feeding the cards. And the fused. 7 and 8. Stayed good. Maybe a bad travel cable

What was the solution to this problem? I'm experiencing the same issue.
1. Replaced the rectifier board and experienced the same issue with fuses #7 and #8. If I (Rect.1)pull the wires for 48VAC then fuses #7 and #8 don't blow.