One of my genelec 1031a amp is making a noise like a hum or buzz.
I have replaced the filter caps for the 57 volt and the 15 volt supply. I have also sprayed contact cleaner on all connectors. No Love.
there is a ribbon cable going from the power PC board to the input PC board and I have found that if the input board is plugged in the 15 volt rail get pulled down to about 3 volts. if its unplugged it stays around 15VDC.
This amp uses the STK 4241V amp IC.
Any help would be great.
thanks
fvf
I have replaced the filter caps for the 57 volt and the 15 volt supply. I have also sprayed contact cleaner on all connectors. No Love.
there is a ribbon cable going from the power PC board to the input PC board and I have found that if the input board is plugged in the 15 volt rail get pulled down to about 3 volts. if its unplugged it stays around 15VDC.
This amp uses the STK 4241V amp IC.
Any help would be great.
thanks
fvf