Who can help with this Chromacolor 2?

[Carmine]

The person who is in charge of the displays at the WP Chrysler museum (where my '59 Zenith SC was displayed) sent me the following e-mail a while back:

My wife is very active in the Farmington Players doing community theater, she has appeared in plays there and is currently directing one, Neil Simon's "Part two". The play takes place in the late 70s and the stage setting is two different New York apartments. Would it be possible for me/the Farmington players to borrow those two sets as functional set dressing pieces for this play? We would like to use them by hooking them up to a DVD player and playing bits of period shows like "Three's company" and "Love Boat", perhaps an old news broadcast at certain parts of the play. we would come get them and return them and treat them with the upmost in care and respect. I will personally see to it that they are covered with furniture pads after each show. We would give you credit in the program and some complimentary tickets to the show.

I want to help him out. I think its cool that somebody finally cares about authenticity!

But here is my problem... The curved Zenith (panarama) has a problem where the tuner "drifts". You get it tuned in perfect, then it slowly de-tunes itself. Other times, the channel that came in perfect is suddenly full of snow.

I removed the IF module and re-soldered all the female contact points after finding one with a micro-crack in the solder. I did the chroma module (because I noticed some color-shifting) and the board with AGC circuits (forgot the name) for good measure. This didn't help the tuner problem.



Captain Moody says I need to re-solder the actual tuner board on the backside of the flip-down chassis. However, this isn't a plug-in module, so I'm not exactly sure what needs to be re-soldered. A close inspection doesn't reveal any cracks.



I think the problem is in the varactor part of the tuner, because it reacts to the slightest movement. Are there any typical problems with these?



On the positive side, I did spend some time touching up screen controls and other adjustments. It does get a hell of a nice picture when it works properly..

I actually think it might do OK with a strong source like a DVD player, but I don't want it giving any problems during the play.