"Golf" wrote in message
ups.com...
"Golf" wrote in message
Thanks Leonard. A used tube is better than a bad one. I am interested
if you have one to sell. I'm not really familiar with the grey scale
tracking stuff. I have never replaced a yoke. Is there much to this?
I have replaced a tube in my 50" Hitachi. It came complete. Not too
much problem except for convergence, but I did get this corrected. Now
about the existing red tube - set kept blowing a fuse in the vertical
power supply. This particular model apparently had this common problem
due to bad solder joints on the convergence IC's. Took care of all
this. Couldn't get high voltage to come up, but I could hear crackling
noise at power up from the red tube, also could see arcing inside it.
I disconnected the anode from this tube, and the set now powers up
fine with the green and blue tube only. No more crackling noises. I
suspect the set was going into over current shut down? Anyhow, this is
why I think this tube is bad. Please email me with needed info and I
will take the used tube off your hands. I don't know if my email
address shows in this post so here it is - . Thanks
alot Leonard.
This is a raw CRT. It has no mounting hardware, so you will have to remove
it from the old tube and put it together. You will need fresh coolant. You
should make sure that your convergence and deflection problems are fixed as
this is likely why the red tube failed. With a vertical failure or severe
convergence offset the beam can hit the side of the tube and heats it up at
the yoke, causing a crack.
If you don't know how to adjust gray scale and convergence you need to get a
manual. Positioning the yoke is easy. YOu just push it all the way to the
top of the neck and turn it until your middle lines match the other tubes on
the convergence pattern.
Leonard