Recently I started up the K4005b but within one minute all music was gone and only a deep tone could be heard. I shut of the K4005b and restarted it. The deep tone was still there and the third transistor started smoking. I removed the transistor and started the K4005b. Nothing else started to smoke but the TDA7250 was extremely hot.
Does anyone have an idea how this might have happened? I recently put the K4005b in a new case and the TL072 came loose which gave me some problems in the beginning. Could an unbalanced circuit without the TL072 have caused damage which eventually showed up a couple of days later?
I’m thinking of replacing the TDA7250 along with the transistor. The only problem is that the TDA7250 is obsolete. Does anyone have an idea for a good replacement?
Thank you
Tom