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Forum 141

B&W TV Philips 21TG100U Line timbase fault.

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Black & White Television

Last Post by Till Eulenspiegel 3 years ago

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Till Eulenspiegel

(@till)

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The FD092 scanning coils were not equipped with picture shift magnets so an older type of of magnet once used for 90 degree tubes is being used to position the picture. Many early 110* scan coil assemblies also employed this type of shift magnet.

Till Eulenspiegel.

Posted : 21/05/2021 10:21 am

Till Eulenspiegel

(@till)

Posts: 4947

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The Philips 21TG100U continues to work well since the replacement line output transformer was fitted. The PL81 line output valve is holding up well also. A spare valve is kept inside the cabinet should the valve fail. The only issue reported was progressive reduction of picture height, replacing the resistors between the height control and the boost HT cured the fault.