r6004d

[mpyrol]

I received this amp to repair and it appears to have missing parts. I amp pretty sure this is untouched. I have pics to illustrate. 1) Shouldn't there be a trim pot on the far right channel. 2) Am I missing r760?

The power supply 1000uFcaps are swollen on one rail. I pulled the c2061 and installed something close as a temp to see if the amp would power up. He tells me this amp was working and he purchased it new.

Brian

 

[Perry Babin]

It's probably a factory defect. The pots are likely for DC offset. If so and the DC offset isn't excessive, it may not be a significant problem.

Confirm that the positive and negative rails are equal. If one is significantly higher, you may have a problem in one channel.

 

[mpyrol]

I replaced the supply caps, rectifiers and the two transistors in what I assume are regulators in the power supply and it powered up. I get no unusual heat or current draw. I appreciate your input.

Brian