after rubber now peeping

[Bjorn Julin]

Its "wery" anoying.I cant stand it, silent studio
is a neccestiy, otherwise bad music!

Yepp its the high voltage backlight AC transformer
who is rattling. Not only the florucent displays
but odinary LCD wines to.

I have fixed on on my TG77, tok a long time to get
silent, changed the frequency slightely and finaley
drowned the whole transformer in silicon and a piece of
"silent madrass foam".

My friends SY77 was ok with just some silicon
under the transformer, it rattled against the PCB.

I fixed one D50 and a D550 remote controller,
that one was a paticulary pain, to get it silent
i had to remowe the supply to the backlight.
No backlight yepp but what the hech, it was just
a D550 remote.

BJ


>After fixing the keys I'd like to fix noise:
>
>Most fluorescent displays have some peeping or squeaking
>noise, I guess due to hf transformer for the background
>light.
>
>This seems to be acoustical emissions from the trafo coil.
>
>Has anyone achieved any progress in fighting this
>noise.
>
>Yes, it is silent, but still very annoying.
>
>m.c.
>

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