Couple of '80's-'90's woodgrain plastic TV's
 

I've been seeing these TV's at the flea market for well over a year; but, I never asked about them because I figured they'd be more expensive than I wanted to pay. Today, I asked the owner of the flea market about them and he said I could have them for free. He said the person he got them from claimed they worked; but, he'd never tested them.

The first one is a 19" Sears/Sanyo from '85. This is a cable ready/remote set with a red LED channel display. There was a time I could have gotten $100 out of this set; but, it's not worth nearly that much now. I think this is the set that uses a vertical module with surface mounted parts and they were known to have bad connections on the module. Otherwise, they were good TV's and made nice pictures. This one works; but, has a snowy picture.
http://i538.photobucket.com/albums/f...ps1563245f.jpg

The second TV is a plain jane mono 25" Magnavox from '93 that uses the 25S1 chassis. This one is dead and I think it's the one that has the failure prone 100 uf cap in the power supply that will eventually cause the HOT to short and take out the power supply. These were also good TV's with decent CRT's.
http://i538.photobucket.com/albums/f...psf1fb9db5.jpg

those are very decent magnavoxs.saw more than a few and they produce a fine picture

I have a Maggie a couple years younger than that torn apart in the cold cold shop waiting for me to get back to it when the weather gets better

I opened the Sears and I can tell that it has a lot of hours on it. Looking at the CRT, it has an EIA code of 274; which, is RCA. The snowy picture appears to be caused by a defect in the AGC circuit. On the AGC terminal of the tuner, I have 7.9 volts and this voltage remains the same regardless of input signal level or the position of the RF AGC control. The next thing I'll probably do is apply a variable DC voltage to the AGC terminal of the tuner to see if I can get a clear picture.

I opened the Magnavox for a quick look and it is the model that uses the failure prone 100 uf cap that's located behind the flyback. The HOT is shorted; but, I haven't looked further. The EIA number on the CRT is 312; which, is Sylvania (no surprise there).

The Magnavox was a pretty good set (back in the day). I used to do warranty work on that chassis, and also used one in my home for many years. If I remember correctly, that is one of the many Phillips boards with a horizontal driver transformer that had 4 pins that came up through the body of the transformer with the winding wires soldered on the exposed top of the pins. Make sure you re-solder those connections (bottom of the board and on top) as they were very prone to cold solder joints, which usually shorts the horizontal output transistor.

The chassis in the Sears set was made by Sanyo. They were notorious for the odd vertical output board (which used to only be available from Sears). The little board is mounted on a small metal heat sink, and were very prone to failure. I douby they are available any longer. At any rate, they usually had a pretty good picture on them.

I have that maggie, still good pic, HOT shorted a year or so ago, replaced it an been fine since. IIRC that was the only issue, cap was ok.

They look to be in good cosmetic shape.