465 Scope Question


Bill
 

Started out with no -8vdc. Replaced the bridge rectifier now I have -6.5vdc. The power transistor Q1566 checks out as OK. Lifter C1569 but that didn't help. The voltages on Q1566 are ok except the Collector voltage is a little over =3vdc when it should be +5vdc. I'm going on the assumption that something downstream is dragging down the -8vdc but is not a dead short.

Sound reasonable?

All the other Low Voltage power supplies are dead on in voltage.
Bill

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