08-02-2010, 05:26 AM
The Sam's will have the schematics. Be careful when measuring voltages, etc, for solid state devices are far less forgiving than tubes. Use a modern digital meter, (or an ancient VTVM) only to do this.
Like any other device, tube or transistor, I would first suspect filter capacitors in the power supply need to be changed. If you have a picture and sound, this one can probably be fixed. And use a nice strong clear analog signal from your cable to do the testing. I'm sure you can find a cable to analog converter for next to nothing.
And any controls (potentiometers) should be cleaned; I like deoxit. And any accumulation of dust and crud needs to be cleaned out from the circuit boards and the flyback area and cables must be cleaned up too. I like denatured alcohol for this. Make sure you let everything dry out for a day before powering up after you clean things up.
Like any other device, tube or transistor, I would first suspect filter capacitors in the power supply need to be changed. If you have a picture and sound, this one can probably be fixed. And use a nice strong clear analog signal from your cable to do the testing. I'm sure you can find a cable to analog converter for next to nothing.
And any controls (potentiometers) should be cleaned; I like deoxit. And any accumulation of dust and crud needs to be cleaned out from the circuit boards and the flyback area and cables must be cleaned up too. I like denatured alcohol for this. Make sure you let everything dry out for a day before powering up after you clean things up.
