I got a CTsomething 1000 here and a JBL plate amp build by them and both have the same readings. The power supply is not running.

I find there is a source called 30VCTRL or some, and I finally found out it comes from a winding on the transformer. However it a pears there is a startup pulse applied to it.

What I don't know at this time is if it is actually starting and shutting down right away. I read no shorts. Of course there could be other things

I have considered next time I put this up I might just put 30 volts in from a bench supply and see what happens.

Any ideas ? Phil ? "Eat **** and die all you have to do is ______ and then drink some battery acid and drop dead". That would be cool, I just want these MFs outta here. Oh yeah and once this is nailed then the plate amp is nailed.

If I get nothing I can do it. I would just like to save time. Get this **** out and the customer is happy.

And it is fairly elusive, it has to have something to do with AC BULK. How else can they start it ?

So anyone familiar with this who can shortcut me to the fault ? I'll return the favor whenever I can.

That is a Harman product these days. My experience with them is that they are pretty supportive, even of legacy stuff.

https://medias.audiofanzine.com/file...ual-479799.pdf

Or: http://schems.com/bmampscom/crown/14...l%204-2010.pdf


Will be your schematic, or something close to it. Either of those links is searchable as well.


Customer service: 1 (800) 422-8027
Headquarters: Stamford, CT
Founded: 1953
Subsidiaries: JBL, AKG, Infinity Systems, MORE
Parent organization: Harman International

You might try the mother ship.

Peter Wieck
Melrose Park, PA