john, divide and conquer!
First thing to do is disconnect the secondary from the transformer to the pcb. Unsolder the wires from the 'red' wires from the transformer to the diodes. then, the 'yellow' wire that goes to the diodes. Finally, disconnect the blue wire that go from the transformer to D7 this separates the transformer from the pcb assemble. Now, check to make sure you don't have one of the loose wire contacting the chassis and when you're happy, plug in the supply and turn it on. (via shorting pins 1 and 2 together) if the fuse holds, then power down and then re-connect just one of the of the sections at a time. If you find that when you, let's say the yellow wires, blow the fuse, then you have a wiring problem on the output side, most likely a short if the fuse blows with the secondaries removed from the pcb, then you have a short someplace in the wiring that you did when connecting the wires from the transformer to the pcb this should help you, mike, wb8vge On Mar 11, 2012, at 11:36 AM, John Gartman wrote: > Well I installed a heath kit in my AC-4 and all mine does is blow the fuse > when the jumper is between pins 1 and 2. I have gone over it many times. > Wire for wire reds to reds yellows to yellows blues to blues etc. but it > blows the 5 amp and a 6.5 amp slow blow and it blows that also. > What I don't know is what capacitors to leave on the bottom there are 2 that > go to ground. One from the fuse holder and one from L2 Are these needed? > I did not assemble the new circuit board I bought it assembled. I know it is > hard to guess without seeing and who knows what kind of goof ups a yahoo makes > in wiring but anyone have an idea on where to look next ? It did not blow > the fuse before the board was installed. > > Thanks > > John AG6GL > > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist
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