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Zenith pots on CRT neck

Discussion in 'Electronic Repair' started by Ken H, Jan 26, 2005.

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  1. Ken H

    Ken H Guest

    To the group,

    Doing some advanced adjustments on my Digital HDTV C30W47.

    Similar models are C30W46, C32V37, C32V36, C32V46, C34W37

    There are three pots on a PCB on the neck of the Tube near the coil.

    Can someone tell me what these adjustments are for, exactly.

    They are labeled: YH, YHC, YV2

    Thanks in advance.

  2. Andy Cuffe

    Andy Cuffe Guest

    These sound like dynamic convergence controls. They will affect how
    the 3 colors line up over different areas of the screen. Don't touch
    them unless you have a cross hatch generator.
    Andy Cuffe

    <-- Use this email address first

  3. Ken H

    Ken H Guest


    I do have a cross hatch generator (Avia DVD).

    Now what? Guide me in.

    How do I adjust them? Procedure?

    My screen has a bluish tint, after someone else adjusted them thinking
    they were pincushion adjustment pots.

    Need a general procedure. please help.

    Thanks in advance.

  4. Andy Cuffe

    Andy Cuffe Guest

    Those shouldn't have been able to cause a bluish tint. No TV made in
    the last 5 years has pots to adjust that. You could be seeing blue
    shadows caused by the blue not lining up with the red and green.

    The service manual would tell you exactly what those controls do, but
    you should be able to figure it out from their effect on the cross
    hatch. Before you do anything, mark their current settings with a
    sharpie. They will most likely control how well the red and blue line
    up with each other at the edges of the screen.

    Andy Cuffe

    <-- Use this email address first

  5. Ken H

    Ken H Guest


    Will give it a shot this weekend.

    Can't get any worse.....

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