Adjusting the yoke?

[clanggedin]

I have a WG Med res monitor that is displaying a crooked image. I read that adjusting the yoke will fix this probelm, but before I jump in which part of the yoke do I adjust?? Is it the piece of porceline right behind the tube before the copper wires? Do I just rotate it slightly??

[Rickn]

The yoke is the component on the neck of the tube that has 4 wire (normally Red,Blue for horizontal windings and green, yellow for vertical windings.

It will likely secured to the neck of the tube with a clamp, loosen the clamp slightly and rotate the yoke by grabbing the outside (largest diameter) portion of the yoke.

pretty simple, but do not pull the yoke back wards or tilt it up or down or you will affect purity and convergence.

Having said that, if the yoke has large white tape coming out from between it and the tube - it may be a bonded yoke, this one you are not going to move.

Before you do any of this check to make sure the chassi does not have a rotation control.

the easiest way to tell this if you do not haveany documents, is to look to see if there is a round coil, similar to the degaussing coil- it will be just slkightly larger in diameter than the yoke. It will be mounted to the tube and look like a black ring around the yoke.

In this case just use the control- all of our tri-res have them, but our SGA, standard res does not.

Rick Nieman
Rick@niemandisplays.com

[modessitt]

There are also a few things - like keystoning, trapezoid, etc. - that can cause a picture to be described as "crooked" but not caused by the yoke.  If in doubt, post a pic of what it looks like to be verified.

It should also be mentioned that doing this with a LIVE monitor can be dangerous if you don't know EXACTLY what you're doing.  Even a monitor that's off can bite if you're not careful.....