Chromacolor Space command 500!!!!!!

[drh4683]

bgadow sold me 19" space command 500. He brought it to the ETC and OLD TV NUT brough back with him to IL for me. A special thanks to OLD TV NUT for helping get this set and to bgadow for bringing it with him to the ETC.

This is a 1973 model SD1950R.
I got the set all tuned up this evening. Had 2 issues: No Sound and a non stopping channel drive motor.
Took the tuner out to service find out what the issue was. After some close analasis, the directional switch on the gear drive unit had carbon arced and shorted the switch out. Thus, the motor never stopped flipping through the channels when the set was on. Apparently the dialectric grease was gone from the contacts causing the carbon build up. Thats all set now and the tuner works like it should, both directions. The remote pictured is the second generation space command 500 remote and was used only in the 1973 models. Most space command remote styles were used for a few years before a change. In 1974, those large bulky rectangular remotes were used and are among the most common you see on ebay now.

Sound was an easy fix. 90% of all no sound or cracking sound on the 4 tube hybirds is a defective sound IC on the sound module (a 221-48). Zenith designed these sets to be easily fixed, all I had to do was pull the iC out of the socket and put a new one in its place.

Converged the set and did the basic color alignment set up and its got a true chromacolor picture! IMO, the zenith 4 tube hybrid has the best picture of any tube type set. When these are working correctly, the picture quality rivals new sets.