sharp sc9690-tuner,preamp 50 disc cd changer, no electric lights or displays,

this sharp tuner ,preamp cd changer works,but without any display lights for discs, stations, is maddening. anybody have a schematic of this old machine-1996. dial lights ,a hand drawn one if anyone worked on enough of these.the power amp rocks the neighborhood when i listen to led Zeppelin about 3 times a year.