[Amps] 3KW HP Supply Question

[Keith Densmore]

Greetings,
I recently bought one of the cheap surplus ESP120 50 Volt HP supplies off 
ebay (3000 Watt). It works ok but the front panel switch does not turn off 
the supply, it does not appear to do anything. With power to the supply, the 
fans always run, and the supply is switched on by shorting three pins at the 
back.
Before I try replacing the switch, can someone tell me exactly what that 
switch is supposed to do?
Thanks, 73,
Keith ve3ts 


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