This amplifier has not been played despite being old this impeccable, without audio, has the STK0040II on the audio output, and a voltage regulator of -38 Vdc and + 38 Vdc STK3042.-and + voltages 38 vcc are correct, it has an AYB speaker choice key and its tape-mic etec inputs It turns on everything but does not emit any noise or sound, the most absolute silence. swollen or bad tores, nothing overheats, or presents abnormalities in sight. I changed the 2 STK0050II, followed the line and key of speakers, and okay, there were no changes with the Ci replacement, they have the tension on pins 1 and 0 but they do not respond. I need the circuit to follow up - HELP

that circuit can help me. thanks JOMI