Hi,
I am completely new to this field. Due to illness I am no longer able to work and have decided to try to fix some of my old audio equipment as a hobby. I have just begun a audio electronics course but am impatient to try to effect my first repair. This is a vintage Sansui Receiver. When powered up there is a burning smell and a wisp of smoke. I have identified the resistor involved and am seeking to replace it but obviously don't want the same to happen to a new one. I wonder if someone can give me an idea of what may have caused it to burn out in the first place. I attach some images and a schematic. On the images, you will see the burnt ( I think its gold, black, orange, orange) resistor, some marking to the edge of the board and, underneath, there is something brown over some of the pins. Could this be the cause, or is it a symptom of the burnt resistor? Any advice would be gratefully received.
I am completely new to this field. Due to illness I am no longer able to work and have decided to try to fix some of my old audio equipment as a hobby. I have just begun a audio electronics course but am impatient to try to effect my first repair. This is a vintage Sansui Receiver. When powered up there is a burning smell and a wisp of smoke. I have identified the resistor involved and am seeking to replace it but obviously don't want the same to happen to a new one. I wonder if someone can give me an idea of what may have caused it to burn out in the first place. I attach some images and a schematic. On the images, you will see the burnt ( I think its gold, black, orange, orange) resistor, some marking to the edge of the board and, underneath, there is something brown over some of the pins. Could this be the cause, or is it a symptom of the burnt resistor? Any advice would be gratefully received.
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