Hi,
I just bought a new amplifier and it has a problem. When I turn it on the motorized pots start turning and they go to zero. The led around the power button blinks blue and there is a stuttering hum coming from the speakers. When I switch the mute button the led turns red.
I checked the tubes and found one was bad. I replaced it, and still nothing. I also sprayed the pots and plug-in connectors.
I have basic knowledge of electronic repair, and I have an esr meter, a VOM, and an oscilloscope. Where should I begin in order to diagnose this and repair it?
I just bought a new amplifier and it has a problem. When I turn it on the motorized pots start turning and they go to zero. The led around the power button blinks blue and there is a stuttering hum coming from the speakers. When I switch the mute button the led turns red.
I checked the tubes and found one was bad. I replaced it, and still nothing. I also sprayed the pots and plug-in connectors.
I have basic knowledge of electronic repair, and I have an esr meter, a VOM, and an oscilloscope. Where should I begin in order to diagnose this and repair it?