biggal76
Active Member
Recently picked up an SX1280. Sound is great, better than I remember my old SX1250 that I sold and I think I like it better than my Sansui G901 (which I kept over my SX1250).
Problem originally was once you started to push it a little with low frequencies, it would trip the circuit protection relay. I immediately thought DC offset or Bias problem, so I just adjusted those as per the service manual. The left channel was about 60mV offset, so pretty far out of spec, right was ok.
It's all adjusted now, but now, when it draws a lot of low frequency power, the right channel gets into a pulsating approximately 60Hz loop that quickly increases in volume until it trips the circuit protection relay. I have no idea what the problem can be. Anyone have this issue in the past?
Funny that the problem seemed to be the left channel before I adjusted and now is the right. Could excess DeOxit Gold in the tone control switch contribute to this? I flooded it too much when I did the other adjustment as it seemed to still be dirty after cleaning it a couple of months ago.
Problem originally was once you started to push it a little with low frequencies, it would trip the circuit protection relay. I immediately thought DC offset or Bias problem, so I just adjusted those as per the service manual. The left channel was about 60mV offset, so pretty far out of spec, right was ok.
It's all adjusted now, but now, when it draws a lot of low frequency power, the right channel gets into a pulsating approximately 60Hz loop that quickly increases in volume until it trips the circuit protection relay. I have no idea what the problem can be. Anyone have this issue in the past?
Funny that the problem seemed to be the left channel before I adjusted and now is the right. Could excess DeOxit Gold in the tone control switch contribute to this? I flooded it too much when I did the other adjustment as it seemed to still be dirty after cleaning it a couple of months ago.