Ohm's Law will tell you what size resistor will draw half an amp from 15v.įurther issues. Try loading each 15v output to see if it holds up. Disconnect the supply from the mixer section, so you get all the voltages. Yes of course the supply could have a problem under load, but I tend to think it is the mixer part. It detects excess load, and stops feeding it. The power supply is probably shutting itself down. Of course it still could be a short to ground, but would more likely then be one of the million little bypass caps each IC has nearby.ĪT YOUR OWN RISK, one method to find such a short is to apply something like +/-24v to those 15v rails, and let the bad little cap burst, revealing its location. Leave it on a bit and you MIGHT find one getting warm. Where? on one of the many ICs strewn throughout the unit. That may be it, but I fear your short may be rail to rail, rather than to ground.
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