I am working on a Pyle 1400 power amplifier. Can't find a schematic or service info, just the operator manual which is worthless.
The problem is in the power supply board. Turned it on and a few minutes later the magic smoke was released. Opened it up and saw that one of the 4700uf 50v caps had vented. Popped it out and while looking at it I saw that electrically in parallel with this bad cap was another of the exact same value. Of course I know this doubles the capacitance for a total of 9400uf. I had a 5700uf cap 50v and thought I could substitute it so I gave it a try. It smoked that 5700 cap too, leaving the other 4700uf in parallel just fine. I checked it too, ESR is nothing and it shows the proper labeled capacitance 4700uf caps are in the mail. I am reluctant to put in a new cap and watch it smoke too. I don't understand what is going on. It seems to me that the other cap should smoke too.
Pulled the bad out and left just the good one in. The amp operates just fine without this cap. No hum or noise and I can listen to it over my speakers at moderate levels. I am sure that if I started to really push it the need for this other cap would be very evident.
Can anyone clue me in on what is going on? Just to be clear the other two caps for the other side of the PPS are OK.
The problem is in the power supply board. Turned it on and a few minutes later the magic smoke was released. Opened it up and saw that one of the 4700uf 50v caps had vented. Popped it out and while looking at it I saw that electrically in parallel with this bad cap was another of the exact same value. Of course I know this doubles the capacitance for a total of 9400uf. I had a 5700uf cap 50v and thought I could substitute it so I gave it a try. It smoked that 5700 cap too, leaving the other 4700uf in parallel just fine. I checked it too, ESR is nothing and it shows the proper labeled capacitance 4700uf caps are in the mail. I am reluctant to put in a new cap and watch it smoke too. I don't understand what is going on. It seems to me that the other cap should smoke too.
Pulled the bad out and left just the good one in. The amp operates just fine without this cap. No hum or noise and I can listen to it over my speakers at moderate levels. I am sure that if I started to really push it the need for this other cap would be very evident.
Can anyone clue me in on what is going on? Just to be clear the other two caps for the other side of the PPS are OK.
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