Old Blue Jeans and Flying Machines
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tips check..........
Fri Aug 31, 2018 8:03pm

CROWN XTi 4000
Pro audio amp.
When powered on all the front panel LED's light for a fraction of a second and then that is it.. no power. The primary caps remain charged but there is no click of the soft start relay and the SMPS never goes any further. Very complicated power supply with about a dozen safety circuits that can shut it down.
I know a long shot but thought I would ask.
I have the schematics... Thanks.

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