Sound troubles on zenith 19z32q chassis

[jpdylon]

This set has been somewhat of a challenge as something new seems to fail every time I use it.

The set has been completely re-capped and I had to thoroughly clean all the tuner contacts to get a decent picture and sound. This was back in late november.

It had the typical intercarrier buzz that alot of zeniths suffer from - but the sound was undistorted and had plenty of volume. Just two days ago my sound disappeared, but left the intercarrier buzz behind. No sound, just buzz that varied with the scene. This was a sudden failure.

I determined that the audio portion of the set is working by injecting a signal into the audio detector, however the sound carrier is not getting to the detector from the IF strip.

At this point, I am unable to tell with certainty that the problem is in the tuner or the IF strip. However, when the fine tuning is turned through its short range the buzz changes drastically and blank channels reveal that there is white noise so I'm more likely to believe the problem is in the tuner.

I hate to tear the tuner apart again because its somewhat of a pain to get to the wiring and tube sockets. It has a strange oscillator adjustment that looks like a flat head screwdriver sticking up out of the tuner. I don't have an adjustment tool for this.

I know this is a silly question, but is there any easy fix. Any ideas?