LM1876T for Tweeters scratchy noise impulses.

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Hello,
my 4-channel Amp is driving the tweeters with an LM1876T. Since a few days when i switch the amp on there are scratchy, clicky impulses. They are not constantly there.
I disconnected the sources to check if it comes from there but it is clearly the amp.

It is not depending from the volume i set, the noise has always the same volume.
It is not the volume potentiometer which i checkt already.

What could be the problem? What should i check?
Thanks for any help!
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.