Re: Challenging 2465 PS repair

Tom Gardner

Since a *switching* PSU will attempt to deliver a constant output
power, a low input voltage means a high input current flowing through
transistors, diodes and some capacitors.

An abnormally high current might cause damage.

On 03/05/2021, Milan Trcka <> wrote:

In an attempt to keep in as much smoke as possible when powering up suspect
or failed PS, I use an adjustable transformer (Variac) to slowly bring up
mains voltage while monitoring for vital signs. Use isolation transformer or
battery powered isolated scope when monitoring waveforms.


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