Is it possible that the square wave is the badly clipped sine wave?
Do the inputs to the LM339s pulse with no outputs in the circuit?
Do the inputs to the LM339s pulse with no outputs in the circuit?
I cannot be sure about the signal I was seeing at the outputs. It happens so quickly usually all I see on my scope is a random flash-change off flat-line.
With the outputs removed from the amp everything still power cycles. I've got the outputs installed right now but will look at removing them if nothing else.
With the outputs removed from the amp everything still power cycles. I've got the outputs installed right now but will look at removing them if nothing else.
Kev79,
I actually never fixed this one. I still have it in my posession though. I had verified with another MTX that this one's pre-amp board was in good condition. In one of the previous posts from Perry, I had taken his advice and removed Q102 with little effect.
I actually never fixed this one. I still have it in my posession though. I had verified with another MTX that this one's pre-amp board was in good condition. In one of the previous posts from Perry, I had taken his advice and removed Q102 with little effect.
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