🚀 go-pugleaf

The ghost of tedpan@techbook.com (Teddy Panarto) writes:
>I have an old Sony TV with an annoying problem:
>       Whenever the TV is displaying bright pictures (white color), the
>audio gets distorted, and the level of distortion is proportional with the
>amount of white colors on the picture. The problem appears easily on
>Volkswagen commercial (if you've seen it), because most of the picture
>color (i.e. background) is white.
>Please e-mail (if this has been discussed before), or post any suggestions
>or comments.
>Thank you.

If the distortion is in the form of an annoying hum, the problem might be that
the audio trap transformer is misadjusted.  This transformer acts as a filter
to remove the audio from the video before it goes to the video amplifier and
as a transformer to extract the FM from the video to bring it to the FM IF
section.

You should be able to find this transformer easily as it's right after the
video detector (diode) and before the video amplifier and also leads to the
audio section.

There might be more tunable components involved with this as well.  Try to get
the schematic.
-- 
/*  rcarter@wpi.wpi.edu */      /* Amazing */             /* Joseph H. Allen */
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]?a[p+=a[p+=q]=q]=q:0:0;for(;q++-1817;)printf(q%79?"%c":"%c\n"," #"[!a[q-1]]);}