ok heres the deal. I won grand champion with my amplifier at hendricks county 4-H, and was selected to go to state. The electronics judge told me to redo the circuit board befroe state fair because the ancient soldering iron I was useing was cruddy and didnt allow me to do a good job at all. Well, I redid the board today but when I went to plug it in and play it nothing happens. You can only get sound out of it when you do this: one of the channels on your output source to BOTH inputs on the amp- no ground, only one channel + and ground into + and + in on the amp. Both channels play fine that way, but its not the way its supposed to be. You hook up your ground and the sound cuts off immediatly. If you unconnect it and touch either of the inputs on the amp you will get the normal buzz sound out of the speakers, but grab the ground and it theres a pop and the speakers jump and theres no sound at all. Do you think my chips are fried? ( I tryed two chips I had- one was the one that did work in the amp before I redid it and another was one I had used in a circuit and desoldered again- I dont know if it worked to begin with. I did try it on the circuit board and got the same problem, and I even hooked it up on my solderless breadboard to try and diagnose it, SAME PROBLEM! forgot to mention my chip, its the TDA7264 chip. Also one more problem, if you hook it up like normal ( left/right/ground) obviously no sound, but if you turn my cd player up to full and turn the bass up all the way theres an intermittent ( horribly distorted ) sound every time you get bass in the music, but it wont have any high end at all. Only chopped off distorted bass... almost sounds like repeted farting only short and stiff.. haha. Anyways, I have to have this fixed before tuesday august 3rd, 3 days away. Anyone know anything that might be wrong? If its my chip, does anyone know anything about ST's samples program? would they do free next day air?
thanks for any help

thanks for any help


