I’m trying to repair an old Philips record deck. T5 in this circuit was smoking, so I replaced it (and F1 which had blown) but on power up the replacement T5 (2N2222) fried immediately as well. Can anyone tell me what I should look at next?
I’m trying to repair an old Philips record deck. T5 in this circuit was smoking, so I replaced it (and F1 which had blown) but on power up the replacement T5 (2N2222) fried immediately as well. Can anyone tell me what I should look at next?
Check the preset. If it's old it might have lost connection between wiper and track, and it's not designed to fail safe.
If it loses connection it turns the bias up to full and destroys the output stage.
Thank you all. The preset checked out OK. I suspect as mentioned above that the problem has cascaded, I'm now looking at the probably simple option of replacing the amp completely ....