704A ISO schematics and/or advice?

[greatwhiteslark]

Hi everyone,

I've had a 704A powering non-Altec speakers (I know, it's a travesty) for a few years and the right channel decided to go dark last night. I've checked all the inputs and outputs to no avail, my multimeter shows signal coming in through AUX on both channels and no voltage on the Right A, B, or Headphones outputs.

While this seems to be more of a pro equipment board, I hope someone has scanned some information on this lovely old receiver or can point me towards a likely culprit.

After working with new Soundcraft, Crown, and JBL gear all day I want something uncomplicated and warm sounding in my den, I really don't want to have to search out another 70's vintage receiver that *might* need some work. I already have one of those!

Thanks for the help!

[Old Guy]

If all else fails-
ALTEC 704A service manual | servicemanuals.net

I don't have any of the Hi-Fi stuff but somebody here might.