Apple //e power supply no output

4 posts / 0 new
Last post
Last seen: 5 years 9 months ago
Joined: Jul 27 2018 - 22:56
Posts: 1
Apple //e power supply no output

Hello all, I am new to this forum so please tell me if I am breaking any rules.

The Aztec power supply on my Apple //e doesn't output anything, and I have run out of ideas as to what could be causing it. I have replaced all electrolytic capacitors, as well as the RIFA paper cap, and there was still no change. I checked all of the traces and inspected the solder joints and nothing would indicate that there are any cold joints or broken traces. Any ideas about what it could be are appreciated. I can also post some pictures later if that would help.

Last seen: 10 months 4 weeks ago
Joined: Jul 28 2018 - 04:29
Posts: 67
First I‘d start measuring the

First I‘d start measuring the voltage at the transformer primary, then on secondary side and see, if the correct voltages come to and from the transformer... so you would be able to tell, if the problem is on primary or on secondary side.

I guess, you already have checked the fuse?

speedyG's picture
Last seen: 4 years 11 months ago
Joined: Nov 16 2011 - 07:45
Posts: 2493
and the followup pages

Last seen: 1 year 1 month ago
Joined: Aug 4 2018 - 21:59
Posts: 139
Check the little feedback

Check the little feedback transformer, one of the windings goes open circuit. Its the most common cause of the symptoms you describe once the supply has been recapped.

Log in or register to post comments