Hi
Because the old loudspeaker was making a noise like a squeak, the suspension was damaged ι replaced it with another one which the seller told me was the same in rms watt 150 watt rms 350 watt peak 10 inches and the resistance is 8 ohm like the old spaker
The strange thing is that when I put the new one it played well with a lot of good sound quality for about 20 minutes and then it burned two fuses at the input of the transformer because one of the two transistors had a burn at the output.
More specifically, the 2SC5200 has burnt not its complement 2SA1943
After that I checked the circuit well, I did not find any other problem according to my estimates and I only changed the glowing transistor 2SC5200 using the old that was not glowing 2SA1943
The result was the same, the fuses at the entrance 4Α and the same transistor 2SC5200 were burned again.
Because the old loudspeaker was making a noise like a squeak, the suspension was damaged ι replaced it with another one which the seller told me was the same in rms watt 150 watt rms 350 watt peak 10 inches and the resistance is 8 ohm like the old spaker
The strange thing is that when I put the new one it played well with a lot of good sound quality for about 20 minutes and then it burned two fuses at the input of the transformer because one of the two transistors had a burn at the output.
More specifically, the 2SC5200 has burnt not its complement 2SA1943
After that I checked the circuit well, I did not find any other problem according to my estimates and I only changed the glowing transistor 2SC5200 using the old that was not glowing 2SA1943
The result was the same, the fuses at the entrance 4Α and the same transistor 2SC5200 were burned again.
