I am original owner of v 1969 Lancer 99 speaker system with the enclosed SE408S Transducer Energizer. After 34+ years of faithful service (other than replacing some bias adjustment trim pots, as I recall), the amp has developed an annoying AC hum even with shorted inputs and makes unpleasant crackling noises when input is moderately high.
I love this old thing and want to get it fixed, right. No longer have an oscilloscope, so cant do much testing. I suspect the power supply filter caps, but not sure.
1) Where can I find a circuit diagram and/or service guide/bulletins. I've searched the LH web site without success.
2) Who does good repair work in the Bay Area of California?
Any and all advice is appreciated.