Hi ... I found this neat 70s vintage Kenwood reciever at garage sale. Don't know anything about it but seems to have great FM stage... Everything works perfect, but no lights. 4 fuse like faceplate lights, dial, stereo indicator, signal strength... none work. Bulbs test OK. Voltage to bulbs 7.7v DC. Any ideas or schematics available. You might tell I am new to this tinkering.... Thanks, Vaughn.