I have signal into the middle board but no drive out. I have signal in on pin 5 of the 393 chip. Square wave on output pin 1. triangle wave on pin 2 and square wave on pin 3. Signal on pin 5, 6 and 7. plus and minus 12v is good.
On the power acoustik BAMF-5500 that is a smaller version of this amp, the modulation that drives the next board uses pins 5 (audio), 6 (triangle) and 7 (output to driver circuit). Look at the attached photos. Do you see an IC with those signals? The lowest numbered image is pin 1.
- Status
- Not open for further replies.