OT: Wall-Wart Question

MisterM · 852

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Offline MisterM

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on: April 26, 2019, 02:36:28 AM
Excuse this off topic post but I don’t know where else to ask and the technical knowledge on this forum may be able to help.  I have a 12V. wall wart (NEC AD-400) that has not been used for several months due to damaged insulation. I decided to fix the damage and step one was to check that it still worked so I wouldn’t waste my time. Before I plugged it in I connected my meter to the output and got 15V. After sever days it still reads 15V. and has not yet been plugged into the AC. How can this be?

Frank Horvatich


Offline Paul Birkeland

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Reply #1 on: April 26, 2019, 04:40:57 AM
There's a charged capacitor in it and no bleed down resistor across it.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline MisterM

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Reply #2 on: April 26, 2019, 04:47:39 AM
OK Thanx

Frank Horvatich