Well after tracing the signal I still can not find why the left channel is dead. Does not show any signal at the meter. Cleaned all the pots best I could. I found no signal at the out put transistors for the left channel.
Don't know much about Sansui. Didn't know if the 8080 had unattainable parts. I'm really hoping he has the source switch set wrong or something. He said he bought it with a house full of furniture at an estate sale.