Sampo color

[Airedale]

Just picked this up, have yet to fire it up. Saw it working in a pic.

The sticker is gone, so I'm unsure what year it is. For 30 bucks I had to say yes.

My '74 Trinitron is dead (never figured out why), I hope this will take its place.

[Electronic M]

Nice set.
Don't forget to rinse and repeat.

[Airedale]

So its hooked up, I had to tinker with the color and vertical controls. The picture isn't as clear as I'd like and there's still a yellow tint to the screen. The color tuner is very touchy, as in if I touch it wrong the picture will go black and white.

I'll pull the back this evening and give it a quick look, then see if I can clean the color tuner.

Could one of the guns be going bad or is it likely this sketchy color tuner?

[zeno]

Clean the tuner & customer controls & you should be OK. Its hard to
tell but the pix looks to bright.
To rough check the CRT turn the color all the way DOWN so you get
a B&W pix. If its not B&W the CRT is probably getting weak.
Some adjustments may help that out.

BTW we sold Sampos for a few years. They ran & held up good for
a low priced set. Yours is apx late 70's

73 Zeno
LFOD !

[Airedale]

It goes B&W when the color tuner is turned down, the picture is nice and bright. So I assume the CRT is still strong.

I can't find my deoxit so I'm putting off cleaning the controls.

As for now, I'm home and watching one of my favorite movies "Night of the Comet"

[damen]

I kept a similar Sampo around because it has a radio. We once had to contact the company to order a part and they shipped us a complete chassis.

[vortalexfan]

Originally Posted by damen

I kept a similar Sampo around because it has a radio. We once had to contact the company to order a part and they shipped us a complete chassis.

With a radio built in like that, I wonder if your set was a hospitality set?

[Airedale]

After playing for seven hours, being tinkered with, the yellow tint is now nearly non existent. The picture even seems a tad crisper.

The controls are still touchy but I am very happy with this old set. I will try and get the case cleaned tomorrow and the controls cleaned this weekend.

[probnot]

Originally Posted by Airedale

After playing for seven hours, being tinkered with, the yellow tint is now nearly non existent. The picture even seems a tad crisper.

The controls are still touchy but I am very happy with this old set. I will try and get the case cleaned tomorrow and the controls cleaned this weekend.

I've heard of CRTs taking a while to "wake up" after sitting for years and years. Sounds like yours is nice and strong and just needed to be used for a bit.

[zeno]

Thats probably the case here. More use will help & warm up time
will come down. If you dont drive it hard with a lot of brite & contrast
it will look better too.
Zeno

Originally Posted by probnot

I've heard of CRTs taking a while to "wake up" after sitting for years and years. Sounds like yours is nice and strong and just needed to be used for a bit.

[ARC Tech-109]

Look on the top of the IC's for the date codes, something like 8034 or 7921. 8034=34th week of 1980 when the part was actually made, figure a few weeks of time between factories and this will help narrow it down.

[Airedale]

I cleaned the TVs outside and opened the case to blow it out, heres what I found out.

1. Wear a mask and goggles next time!
2. On the inside diagram it says the tube is a Hitachi cs-13A , but on the tube it says Hitachi 379ECB22-TC06.
3 the i.c's are all NEC brand, the huge one is marked upc580c, but had no build date.
4. The tuner is a Mitsumi Elec. Co. LTD with a build date of June 1983.
5. The Sharpness control on the back has been repaired with a trio of resistors in parallel.
6. The channel knob was broken and badly repaired.

I'd like to determine the correct resistor to replace the 3 that are soldered together.

I can't find my deoxit, so I just ordered more. I'll try cleaning the touchy tuners when it arrives.

Beyond these minor issues I am loving this old set.

[Jon1967us]

Tuner cleaner: what’s the best stuff?

[Electronic M]

Originally Posted by Jon1967us

Tuner cleaner: what’s the best stuff?

I favor a product called "De Ox Id" it's cheaper than deoxit(which went ripoff level last time I saw it at radio shack) and seems to work comparably well.

[Airedale]

Tuner controls are cleaned. Noticeably a bit better than it was, still not perfect. The Color control is still a bit touchy.

The yellow tint that it had has faded away, looking good.

I've about 20 hours on this lil set now, I love it. I'm calling it "good enough", its going in the bedroom.