1961 Coronado Capri

[Electronic M]

Originally Posted by fixmeplease

My aqua dag coating is supposed to arrive today so Ive been outside scraping the old coating off, which went pretty good. Almost all of it has been removed but I have a question. in the picture I am including, I circled a small amount of dag which is closest to the neck. There is some other type of coating, which doesnt look like dag, above the part circled. Is there an electric connection between the two areas or are they isolated from each other somehow? EDIT: Now that the sun broke from the clouds I can see that its on the inside of the tube so I answered my own question and feel dumb, LOL

The dag above the circle is INSIDE the CRT vacuum (so no need to try removing it). They would paint it inside the neck after the phosphor is applied and before aluminization (you can see some of the aluminization in areas where the dag brush did not completely coat the glass) to improve conduction in key places.

[fixmeplease]

It went real well scraping, masking and coating it. I ended out scraping the whole thing clean. Now if the other parts would just arrive!

[fixmeplease]

Success! I changed the electros, a reg cap and a resistor that were in areas I had to solder anyway, plus some tubes.

The bottom half is brighter than the top half (the picture was not moving when I took it). My brightness will go much higher when I turn that control. Volume sounds ok. I only ran it a couple minutes.

Will start recapping, but how do I get rid of the 2 parts on the screen? (There is a curtain reflection on the top half)

Also, can I safely pull the chassis back, laying it down, to get at the picture tube button hole to safely discharge it? Can anything on the chassis bite me when I do that? theres no other way to get at it as you can see.

[Marco-nix]

Originally Posted by fixmeplease

Success! I changed the electros, a reg cap and a resistor that were in areas I had to solder anyway, plus some tubes.

The bottom half is brighter than the top half (the picture was not moving when I took it). My brightness will go much higher when I turn that control. Volume sounds ok. I only ran it a couple minutes.

Will start recapping, but how do I get rid of the 2 parts on the screen? (There is a curtain reflection on the top half)

Also, can I safely pull the chassis back, laying it down, to get at the picture tube button hole to safely discharge it? Can anything on the chassis bite me when I do that? theres no other way to get at it as you can see.

Congrats fixmeplease ! .. now you need to continue.. ( for a better result, i would change all caps and resistor ( paper and wax if the TV has them..)Even if some caps look like good , sooner or later they will ... POUFFFF !

[fixmeplease]

Yes, all the bumble bees are gonna go bye bye.

The yoke also plugs into the chassis. Is that safe to touch? (off and unplugged of course) I dont want to get zapped. Plus my other questions. Thanks guys for all the help.

[Electronic M]

Turn it off and wait a minute or two...The can lytics (which are the only thing other than the CRT that can hold charge) should discharge in that time. Once the cans have had a chance to discharge themselves, pull the chassis (the yoke may need to come off with it) back until the HV cable is taught or the HV connector is easy to get at (whichever comes first), and discharge the CRT.

[fixmeplease]

Is it safe to unplug the yoke? it has a tube like connection into the chassis and the wires are real short. That would leave the yoke on the CRT. Thanks!

[Electronic M]

If the yoke unplugs from the chassis, then is it perfectly safe to unplug (also safe if soldered on, but more of a pain to remove and reconnect properly).....Just don't power it up with the yoke disconnected....Pull the HO tube cap if it's series string heaters (if parallel pull the H and V output tubes) and you need to run it without the yoke.

If you have a test CRT and a spare yoke it will probably work safely with any similar era yoke.

[fixmeplease]

Thanks! I'll give it a go again tomorrow, replacing a few caps at a time.

[fixmeplease]

I got it recapped today, plus found several resistors out of tolerance, one by a lot, which was on the vert linearity control (a 3.9Meg that tested almost 10M). The TV has a mostly full screen picture now, great sound, but the vertical hold is hard to keep still, so I will have to deoxit that control and see if it helps. But Im done for today. I may have more questions but not tonight. Thanks!

[Marco-nix]

Originally Posted by fixmeplease

I got it recapped today, plus found several resistors out of tolerance, one by a lot, which was on the vert linearity control (a 3.9Meg that tested almost 10M). The TV has a mostly full screen picture now, great sound, but the vertical hold is hard to keep still, so I will have to deoxit that control and see if it helps. But Im done for today. I may have more questions but not tonight. Thanks!

well, if you don't still keep the vert hold, it is probably a tube ( Vert hold or Vert line , in the VERT section anyways.i can't say )on the chassis. but, change the resistors and you will see what happen Fixmeplease .. show us some pictures from your work with the tv ...sorry if my English is bad , I speak french and i don't use a translator...

[fixmeplease]

I'll get some more pictures on tonight. I think your right about it being a tube and i think I know which one and ordered it today. I think I finished up the chassis today. I changed out a few more resistors in the video tube areas and not much more I can do, I dont think. It did make the picture a little clearer. I do need to adjust a slug a little so am going to read on that.

[Marco-nix]

Super fixmeplease !

[fixmeplease]

OK, Ive already posted quite a few pictures but heres a few more. One is after I put new aqua dag on. One on the bench with picture was yesterday and the one of Hoss is after I was done today. The one of the underside is before I worked on it today, which was just 4 more resistors. There are 13 new caps, plus 3 electros, and 8 resistors.

My screens bottom part is lighter sometimes than the top, people look a little tall, its off center a little, and some vertical hold problems, but its quite watchable and Ive ran it a lot today. I have a tube ordered that I think will solve the vertical hold. Then I'll worry about the rest. I'll take it apart again in the summer and bead blast and repaint, except the areas with writing. Its a 17"

I really like analog sound better than digital, including old radios I work on. My hearing is bad and its easier for me to understand.

[Marco-nix]

Cool !.. now we can watch Bonanza.. lol