Rockford T10001bd no Audio Output.

[rdiaz]

Hello everyone, I have this amplifier with no audio output I have rail voltages, I also have the -+6v, on the TLC072C's I have +8v and -13v, the 8v doesn't seem to be right if some one has any suggestions I really appreciate them. Thanks.

 

[Perry Babin]

What's the output of the LM317?

 

[rdiaz]

LM317 (U7) is 10.45V, LM317 (U6) is 5.2v measured from RCAs ground.

 

[rdiaz]

I was testing at 12v on battery, I raise the voltage to 13.8 and now the amp is in protection mode.

 

[rdiaz]

I just notice on the power supply some one changed 4 mosfets.

 

[rdiaz]

on the LM317 input I only getting 12.8v.

 

[Perry Babin]

Do you now have approximately the same ± on the power supply terminals of the TL072s?

 

[rdiaz]

Problem founded R32 was opened.

 

[rdiaz]

Thank you for your help.

 

[Perry Babin]

Where is R32?

 

[rdiaz]

Here is.

 

[rdiaz]

Here

 

[Perry Babin]

From the diagram, I would never have guessed that that could have been a problem.