Quote:
Originally Posted by wa2ise
That was an excellent Buggs Bunny cartoon!  |
Agreed!
Nick, what does "high level demodulator" mean?
As of Wednesday I got the cabinet up stairs and dismantled the CRT mask/safety glass/trim assembly for cleaning.
On Thursday I cleaned the disintegrated rubber gasket from the Glass and mask. I used Goof Off to get the rubber off the glass, and started to use it on the mask. I then realized that it would be too harsh on the paint of the mask, and switched to rubbing alcohol, which is also not particularly good for the paint, but less harsh and yet still efficient at dissolving the rubber goo.
On Friday I started to polish the the the brass trim. It was not going fast at all on the lightly tarnished piece I started on. After that piece was good on Saturday, I grabbed the worst corroded piece I had and started experimenting with technique, and found that vigorously scrubbing the polish on with a tooth brush was VERY effective. Sadly even though it looks good from a distance it is clear up close that these pieces are brass plated copper, and that all pieces have spots of varying size where the plating was corroded through over the years.
Nick I found out why those corner pieces were loose....Their retainer clips are busted. On the left is a good one the two others are the bad ones.
I mounted the corner pieces with the bad retainers at the top, and reinstalled everything in this picture.
I did a quick green purity (at the time the red would not work) and neglected to take a picture. I was confounded by the red not working for some time, but then found that there was a lead touching the screen wire terminal that was shorting the screen to ground
It looked much better after that.
The color circuits work, and I did some minor convergence tweaks to improve the picture. I still need to spray deoxit into some of the convergence pots as they can get squirly and mess with the deflection circuits. Still tons of adjustments to do which I'm going to need to fabricate a yoke extension cable to preform, and then hope that either the convergence will reach where I need it or that the set will not mind having the convergence yoke unplugged.
And what Nick has been wanting to see.....Color bars.
My camera made the left side look worse than it is, but it is clear that the demods need adjusting.
There is a nasty imtermitant that kills the signal at the second IF tube. I'm begining to wonder if the socket is bad.....
I actually lifted that set (minus the top lid) on to the black roundy my self. If it was not for the sore mussels I'd have been pretty proud of doing that.
