Rockford Fosgate BD1000@1

[RockfordFIx]

Perry,

i can't find the carrier signal.. cant find it with my scope. I was troubleshooting the lm6361n and powered it with it removed and now i have lost the carrier triangle wave. I even looked for it at the LM6172. Where is the origin of the carrier signal generated?

 

[seankane]

Is the LM6361N installed now?

Do you have the schematic?

 

[Perry Babin]

Pin 7 of U11 should have essentially 0v DC and have a triangle waveform.

 

[RockfordFIx]

Perry and Sean,

sorry for the delay...yesterday i had no carrier wave on pin 7. i just removed one from a parts amp and installed it and now i am making some headway. I have my carrier waveform. Yesterday i had 8v on pin 7.

Now that i have my carrier waveform the mic4420 has a nice square wave on the outputs of both. I also have the correct waveforms now on both the railswitchers and the audio outputs. I have about 12volts on the speaker outputs still.

I have a few things left to check and hopefully have this one wrapped up.

 

[Perry Babin]

If all other components are in the circuit, post the DC voltage on all pins of U17.

 

[RockfordFIx]

Perry,

U17
1=00.05
2=-9.28
3=00.04
4=-9.69
5=00.06
6=-00.65
7=9.83
8=00.05