The first thing to try is to operate the Tape Monitor switch about 50 times. It may just need to be cleaned, especially if you don't use that switch regularly. It's a common trouble spot for receivers that is often overlooked. A squirt of DeOxit inside the switch itself just might bring that bad channel back to life.Not a collector, but still have my old STA-42 Receiver which was the first component stereo device that I owned at about age 13 or 14. It has a channel not working and all the lamps are out, but I'm just starting to get into restorations and figured I might have a go at it as kind of a practice run.
Does anyone know if any service manuals or schematics are available or have any general info on where to start troubleshooting a bad channel in such as beast? (Hoping it's just a fuse).
