1991 Zenith Console SJ2722lk5 totally dead

[Jeffhs]

I am trying to find more information on the Zenith SJ2722lk5 TV, as I like all models of Zenith TV, radio, stereo, et al. (I am particularly interested in the details on this particular TV, as it is one of the last sets made by the original Zenith Radio Corporation before the company left Chicago for Korea.) However, every search I've done for this model returns an error. What are the letters following SJ2722? I tried "lk5" but that, like the other searches I've done for this chassis, returned an error, telling me to check my spelling (which I did, several times). The error shows up even with everything properly spelled. Are the letters following the set's model number "lk5", "lK5", "LK5"...? I also did a search for just plain SJ2722 (no letters following the final digit), with the same results.

BTW, I wouldn't operate the TV with just a horizontal line across the CRT, as this will burn the phosphors, as it will in older b&w sets. This line is caused if the service switch, on the rear apron of the chassis, is set to the "service" position; however, if the TV does not have such a switch, the problem is almost certainly caused by horizontal sweep failure. This can occur in solid state televisions (b&w or color) because the horizontal sweep in SS sets has nothing (or very little) to do with the HV plant.

Also, I was surprised to see the Zenith "System 3" badge on the front panel of this TV. Until now, I was not aware that Zenith was still using that particular model name as late as the early 1990s; I thought they had retired it by then, or at least by the end of the '80s.

Thanks much.