Re: DC503 Not Working


On Mon, Jul 27, 2020 at 12:22 AM, Roger Evans wrote:


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.

L549 is fine. When I checked the voltage across C548, that top board was removed. Hence L549 wasn’t connected.

Thank you for pointing that out Roger

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