[TechAssist] Quasar SP2530DE-1/chassis AEDC142 won't power ON

This similar question was recent elsewhere for a different make/model.

This unit came in with an original complaint of "relay chattering" - quite 
audible.  Finally, it just quit coming on by remote or by customer control 
panel.  Only noticeable function is that once POWER ON is selected, you here 
the relay engage - no startup voltage, nor POWER LED status.

I found relay contacts to be charred and replaced it.  Same result.  I replaced 
the surrounding caps and some diodes.  Same result.  I later found some bad 
solder joints.  Again same result.  Unless I have missed some of the immediate 
or adjacent circuitry, I am stumped.. or the unit is determined NOT to let me 
"rekindle its life".

Anyone have a schem or even a partial for the front end of this unit I migh 
obtain and/or some suggestions?

Thanks in advance.
Chaz

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