Re: Again a 7854 power supply beast to be repaired...


Göran Krusell
 

You need a load of about 50W, possibly equally shared between positive and negative outputs. Either on the raw voltages or after the regulator board. You need to check all caps and diodes on the rectifier board, if you have not done this before. You can check diodes by making differential measurements across the diode. I found two bad power diodes this way.
Göran

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