Re: DC503 Not Working

Roger Evans


If you have almost zero volts across C548 then the -22V regulated supply is at almost zero volts. The most likely culprits are C548 itself and C549 which sits after L549 to provide an additional stage of smoothing. You should lift one pin of each of C548 and C549 to check that they are OK. You might as well check L549 for continuity while the other parts are disconnected.


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