portman shore electronics soundsweep 5050

[bnalls]

Hi,
I located a rare rack unit. It's a Portman Shore electronics Soundsweep 5050. It was pulled from a ballroom that was demoed. This is apparently a ball room speaker controller that can feed sound around a room in circles, crazy 8s and other patterns. I intended to use it on a 6 speaker guitar amp.
Anyway, I'm looking for more info on it. We fired it up and the bypass was all that worked. A further check indicated that one of the chips was severely visually fried as well as having one leg burned off that stuck in the socket upon removal.
No idea what chip this is.
Portman Shore Electronics is possibly defunct now too. Do know where to start trouble shooting the chip for possible point to point wiring or whatever.
Any help would be much appreciated.
I'll try and include pics later.
Thanks,
Brian

 

[bnalls]

 

[glpg80]

can you read any numbers on the IC?

if so you could possibly order a replacement IC. ot get one that is close. but if so, then i would still wait to install it and fire it up. if you cant read the letters then there is definately no way to fix a fried IC. the only way to go further on than that is to take a microscope and have an electrical/computer engineer decifer the and/or logic gates inside the IC and suggest a new one.

as far as the board goes, if everything else looks alright physically then possibly you should be alright without having to do a cap job, and maybe get by with touching up soulder spots.

electronically on the other hand, well usually there is a reason IC's are blown. and that deals with either the positive 5V/12V or ground being shorted. either externally inside the unit or inside the IC itself. but without knowing the IC number you cant look up or google a chart for it to figure out what pins are hot/ground, so you are again stuck in a hard spot.

your best bet is to have someone with experience in replacing IC chip-mounts replace the one that was in there, and also trouble shoot the voltage hot and ground connections for that IC on the unit itself. if everything checks out alright, then find out what IC it is that is blown and simply replace it and it will be good to go.

 

[bnalls]

there are absolutely no markings on the chip.
6 marked chips are in the unit and they are labeled 1 - 6 on the face of the chips. This one was unmarked, but had a socket, for ease of replacement, on the circuit board.
There are 7 legs on each side of the chip. It may be doomed to be a mystery forever. I'll try and get a pic of the chip and sockets.

Actually it may have been marked...at one time. Apparently it was blown to pieces. Maybe somebody can source a schematic or perform some magic on this one?

 

[bnalls]

bump for help needed!!!