On Wednesday, September 9, 2020 at 5:19:15 PM UTC-4, wrote:
I have never have not had those problems with my tv since it was new


The Digital System 3 is simply a poor performer and they were when they were brand new. When showing them, we had to make sure every other TV in the showroom was off, including the basic and far cheaper analog System 3 and Chromacolor Zeniths which badly outperformed them at 50% the cost. The DS3 TV was built as a true digital TV and was the first with no mechanical chassis adjustments other than F, G2, and ring magnets around the CRT. While certainly noteworthy in a historical context, as an instrument to view television, they were also noteworthy in a bad way.

I used to have a bin full of all the 700 board chips (many several deep), several 700 boards (the rest of the boards were reliable) and threw them all away about 20 years ago when we put those chassis on the verboten list because of reliability and performance reasons. Half the 700 boards we got from Zenith in the red label (rebuilt) boxes didn't work or didn't work properly, and the yellow label (new) boards were exhausted when the TVs were still in warranty.

Honestly, if you want to keep it running for historical or even sentimental reasons, I couldn't argue with that and wish you luck on your parts search.. But if you want to watch programs on it, you would be better off with literally any other CRT TV of any era, including vacuum tube TVs that preceded it.


On Wednesday, September 9, 2020 at 2:19:11 PM UTC-5, wrote:
On Wednesday, September 9, 2020 at 7:03:30 AM UTC-4, wrote:
Cydrome Leader wrote:
Nancy Lacek wrote:
9-605-05
9-604-04
9-700-15

Will you return the duds in the suplied boxes, with the form filled out
for your credit?
Heh, I think they want to fix it because it weighs around 270 pounds and
it's a struggle to move around.

I used to own the same model and it cost me $20 for a couple mexicans to
dump it somewhere.

It's from the early 90's and has a **** poor picture compared to even the
cheapest lcd/led tv currently on the market. I think that one had the
"teletext" service built into it.

I sold a few of those, and they were absolute toilets. Zenith had some good tech back then but the Digital System Three wasn't any part of it. IIRC, it was based on the ITT digital TV chipset. They were squirrely when they were new and had a terrible muddy picture no matter how carefully they were prepped. On a blank snowy channel, these showed poor color temperature and bloated and blurry"pop corn" snow whereas every other TV back then had crisp, tight snow with excellent color temp. I can't guess why anyone would want to fix one of these unless it was for a historic collection of some sort.