grabread
Active Member
Hello all, I need some advice on tracing a weak channel in an integrated amp. Fault is in the preamp section or tone board.
I think I have tracked it down to the tone board (passive type) but I'm not sure. I have set up a signal generator with 1khz square wave on one channel and sine on the other so I can see which channel I'm following. I am probing with a very shaky old scope which reads only about 10 mv sometimes 5mv on the bad side. about 20 mv on the good channel. Any advice on how to go about tracing this fault down would be very much appreciated.
There is no schematic available for this amp so it's down to good old fashioned detective work.
Many thanks
I think I have tracked it down to the tone board (passive type) but I'm not sure. I have set up a signal generator with 1khz square wave on one channel and sine on the other so I can see which channel I'm following. I am probing with a very shaky old scope which reads only about 10 mv sometimes 5mv on the bad side. about 20 mv on the good channel. Any advice on how to go about tracing this fault down would be very much appreciated.
There is no schematic available for this amp so it's down to good old fashioned detective work.
Many thanks