I have just finished a complete recap of a Sansui G-9000 that came into my shop barely playing. I rebuild lots of recievers. I have rebuilt the PA boards and replaced transistors 5-8 ,the the 2sc1628(NPN) and 2sa818(PNP) transistors with KSC2690AS(NPN) and KSA1220AY(PNP) from Mouser. With the old transistors still in place, I was able to adjust the bias to 16mv with no problem. Both sides started at 3mv like they had never been adjusted with old xors. With the new transistors bias is at zero and can't be adjusted at all. Needless to say at minimum volume there is distortion. Can resistors be changed in the bias circuit like R25+26 390ohm to give me some bias voltage?