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Originally Posted by bgadow
My -15 had the short vertical problem which took some looking but finally I found an open resistor, it was right off of either the height or vert lin. control, I can't remember which, but worth checking.
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That's exactly what was wrong with this one. R105 150k ohm connected between the height and vert centering controls was open. Changed it and the raster opened up nicely! One problem solved... several to go!
I got the rest of the lytics changed last night. Almost a pain trying to figure out where to put them all. Those 80/450 caps take up some space!
Those two tubes that wouldn't light turned out to be a wire on top of the board that had corroded and broke. New piece of wire fixed that.
Today I am going to removed the crt so I can get all the crap cleaned out from behind the safety glass. It should fall right off.
Three other problems I've noticed so far. It seems that I have very little control on the brightness. It's displaying the picture at a "normal" brightness level it seems, but, I can't make it much brighter or darker. It will change some, but not like it should. Checked the control with my meter... it checks good. Any suggestions on that?
The picture will lock on the horizontal when i first turn on the set (with the control turned all the way to one side). Touching anything... whether it be changing the channel, adjusting the controls, or simply breaking wind will cause it to get out of whack. The only way I can get it to come back is to turn it off and then back on. Tried two different horz osc tubes and no luck so far.
The service switch fails to function conrrectly. I don't get anything on the screen when in the service position. I had to remove the verticle output tube for setting the screen controls.
Can't say much for the color right now. I think I saw it get color a couple of times, but, I'm not going to concern myself with it till I get all the other bugs out.
It's getting better... slowly but surely.