Thanks for the replies and apologies in my delay in responding. Had my first covid jab yesterday and spent most of yesterday afternoon and evening with a progressively worsening headache (plus the expected bruised arm sensation), though it has gone overnight.
Continuity on both plug and case fuse is fine. I have just had a chance to check the voltages on the TDA1541A chip, results look not so good unfortunately:
pin 15 measures -15.24V;
pin 26 measures -10.34V;
pin 28 measures +5.05V.
I have looked at the area highlighted around the slightly scorched capacitor (well spotted, by the way) and see the regulator mentioned. How do I go about measuring the voltages there? Is it simply a case of placing the negative probe to a chassis screw and touching each point that the regulator is connected to the circuit board, recording each measurement found? I can the post those results too, assuming the ones already posted taken from the TDA1541A chip dont mean that it is now confirmed non-functioning/unfixable.
Continuity on both plug and case fuse is fine. I have just had a chance to check the voltages on the TDA1541A chip, results look not so good unfortunately:
pin 15 measures -15.24V;
pin 26 measures -10.34V;
pin 28 measures +5.05V.
I have looked at the area highlighted around the slightly scorched capacitor (well spotted, by the way) and see the regulator mentioned. How do I go about measuring the voltages there? Is it simply a case of placing the negative probe to a chassis screw and touching each point that the regulator is connected to the circuit board, recording each measurement found? I can the post those results too, assuming the ones already posted taken from the TDA1541A chip dont mean that it is now confirmed non-functioning/unfixable.