LD Systems Curv 500, current sense problem, or worse?

[Sowhat]

The store owner where I have my shop is in a band... that should come as no shock. Yesterday he came in with his bands LD Systems Curv 500 subwoofer cabinet which also houses all the preamp, amp and power supply electronics for the system with an XLR cord attached to the mic/line input. Furthermore it would not come out of the socket no matter what type of lock picking and poking I employed. It had to come apart, I had to remove that nasty 12 or so pin XLR combo socket from the board so I could take it apart and release the XLR cable. Some judicious hot air swirled on mercilessly cleanly release the connector from the circuit board, unclip two catches on the connector housing and the halves slid apart. A little jiggle and the connector came right out. Seems it was a cheap aluminum type XLR and someone had stepped on it making it oval in shape. Once forced into that socket, it was never going to come back out. So, got the socket reassembled and re installed on the board and then this happened...

I fired it up, the power light flashed red then turned green and the fan started spinning and everything looked peachy, then... it shutoff, the indicator light that is, the fan still purred along but not indication that the amp was running, and it was indeed not running after a more careful check. I have spent hours microscopically inspecting all the SMD work on all the boards, rechecking the socket re-installation, the interconnectors, the grounds, and everything looks great but it still behaves this way. Just like a computer system current sense fault, afterall this thing is virtually a computer anyway, yeah a computer with an audio power amp attached. I have no schematic and I bet you don't have one either but there's so much firmware on this thing it gives me the willies.

Anyone have any thoughts or ideas before I throw myself to the mercy of LD Systems Repair for a bailout?

[nosaj]

The store owner where I have my shop is in a band... that should come as no shock. Yesterday he came in with his bands LD Systems Curv 500 subwoofer cabinet which also houses all the preamp, amp and power supply electronics for the system with an XLR cord attached to the mic/line input. Furthermore it would not come out of the socket no matter what type of lock picking and poking I employed. It had to come apart, I had to remove that nasty 12 or so pin XLR combo socket from the board so I could take it apart and release the XLR cable. Some judicious hot air swirled on mercilessly cleanly release the connector from the circuit board, unclip two catches on the connector housing and the halves slid apart. A little jiggle and the connector came right out. Seems it was a cheap aluminum type XLR and someone had stepped on it making it oval in shape. Once forced into that socket, it was never going to come back out. So, got the socket reassembled and re installed on the board and then this happened...

I fired it up, the power light flashed red then turned green and the fan started spinning and everything looked peachy, then... it shutoff, the indicator light that is, the fan still purred along but not indication that the amp was running, and it was indeed not running after a more careful check. I have spent hours microscopically inspecting all the SMD work on all the boards, rechecking the socket re-installation, the interconnectors, the grounds, and everything looks great but it still behaves this way. Just like a computer system current sense fault, afterall this thing is virtually a computer anyway, yeah a computer with an audio power amp attached. I have no schematic and I bet you don't have one either but there's so much firmware on this thing it gives me the willies.

Anyone have any thoughts or ideas before I throw myself to the mercy of LD Systems Repair for a bailout?

Call them up and see what happens the worst they could say is no.

nos

[Sowhat]

Just a note on this problem. I finally talked with LD Systems Repair and I never had a more pleasant conversation. It could be that my music store owner had just placed a sizeable order with them but the problem was resolved immediately. Instead of bothering with returning the unit, they just sent us a brand new electronics package and said we could use the old one for a paper weight if we liked... talk about remove and replace, just like disposable lighters. This now gives me the opportunity to tear the old one apart (at my leisure of course) and find the problem if I can, then I will have a spare. I forgot to ask for a schematic but based upon my conversation with their tech manager, I feel he will give me one if I ask... maybe I can get a warranty repair deal with them, who knows... Nice folks there.