[TechAssist] Re: Subject: Noisey coils & Transformers
- From: Daniel <danielstarca@xxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 30 Nov 2001 19:02:21 -0800 (PST)
Hi Dennis:
Since you asked :(
I was 'taught' by an older Tv Tech to use a very long
slender screwdriver, and to use the handle against my
ear to locate the actual source of the 'whine'.As some
may know: I was also supposed use rtv sealant to
anchor various sources 'til I had eliminated the noise
altogether.This advise worked in 90% of all cases I
came across,however I had a Zenith portable that
whined so badly that I couldn't quite find the true
souce, and nothing seemed to work.I received a tip at
the time to use a can of lacquer spray and lightly
spray the entire chassis(remove from TV) and it worked
very well.The trick is to get a thorough coating(into
the tranformers and coils) and to use as little as
possible.
Anyway I'm sure the manufacturer would frown on this
procedure, but it certainly works.
--- Dude1127@xxxxxxx wrote:
>
>
> Dennis
> If you can't hear it hook up a small mike to your
> scope to find it.,Les
>
> ----- Original Message -----
> From: "Dennis Viereck" <wa6ati@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, November 28, 2001 10:38 PM
> Subject: [TechAssist] Noisey coils & Transformers
>
> Since we ran the "cleaning the video head" into the
> ground I have
> another question for the group. I would like to
> know how all of you check
> for coils, transformers, and other components that
> sometime have the
> tendency to squeal at high audible frequencies in
> televisions? The devices
> I mean are like flybacks, linearity coils, yokes
> and brackets for these
> devices. Once you find, how do you correct them? By
> replacement or other
> tricks? For those of you, like me, who's hearing
> rolls off at 7 khz and
> can't > hear these noises, how do you detect them,
> and how do you know you
> have it repaired if you can't hear these high
> frequencies?
> Dennis Viereck
>
> =================================
> Help make your TechAssist database better!
> Submit your fixes here:
> http://circuitwork.com/techassist/tip/#tips
> =================================
> To UNSUBSCRIBE your email address, click here:
>
mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
>
=====
-Daniel
Crystal Electronics
help@xxxxxxxxxxxxxxx
__________________________________________________
Do You Yahoo!?
Buy the perfect holiday gifts at Yahoo! Shopping.
http://shopping.yahoo.com
=================================
Help make your TechAssist database better!
Submit your fixes here: http://circuitwork.com/techassist/tip/#tips
=================================
To UNSUBSCRIBE your email address, click here:
mailto:techassist-request@xxxxxxxxxxxxx?subject=unsubscribe
Other related posts:
