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Panasonic TV Model CT-27SL13G, Odd Symptom

Discussion in 'Electronic Repair' started by Brad, Nov 16, 2006.

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  1. Brad

    Brad Guest


    In my service shop, I have a Panasonic TV model CT-27SL13G (mfg 07/03)
    with an odd symptom. The picture is about 6 inches high (black on top and
    bottom), but it is "warped" with a wavy edge (top & bottom).

    I checked electroylitics in vert. circuit. Regulated B+ is 130V, there
    is +27V at pin 2 (VCC) of IC451 (AN5522). I scoped pin 2 looking for
    excessive ripple, but found around 2V P-P ripple. I "rang" the yoke with a
    yoke tester (ok) even though I didn't think it is the cause. I replaced
    IC451 (AN5522), but the problem remains. It may be a problem in the yoke
    return (I have no schematic)? Did you have a problem like this?

    Thanks in advance, Brad

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