High pitched whistle, Zenith 27"


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High pitched whistle, Zenith 27"

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adam
Unregistered User
adamiecjr1@aol.com

Jan 5, 2003, 5:55 AM

Post #1 of 7 (818 views)
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High pitched whistle, Zenith 27"	Can't Post

A high pitched whistle is coming from my 27* Zenith (cable), regardless of channel. It is intermittent and not affected by muting. Any suggesitons? Thanks

Alan
TV Repair Authority

Jan 5, 2003, 10:16 AM

Post #2 of 7 (810 views)
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Re: [adam] High pitched whistle, Zenith 27" [In reply to]	Can't Post

Probably something in the horizontal section.
Have a look at this page:
http://ths.gardenweb.com/forums/load/electronics/msg11204542316.html
Alan

tvbrian
Novice

Feb 10, 2008, 7:01 PM

Post #3 of 7 (106 views)
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Re: [Alan] High pitched whistle, Zenith 27" [In reply to]	Can't Post

you will possibly find its a small transformer rattling causing hi pitched whistle, i used to find it by pressing a screwdriver on the suspected item whilst its in working mode, i have seen them with a matchstick pressed between the bobbin and the lamination then glued the suspect transformer i think is line drive is only about 1" square, dont attempt repair if you are not used to tv repairs as their is hi voltage in the older tvs. good luck

mel
Veteran

Feb 10, 2008, 8:30 PM

Post #4 of 7 (105 views)
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Re: [tvbrian] High pitched whistle, Zenith 27" [In reply to]	Can't Post

A quick and easy fix is to spray the suspect transformer with a clear acrylic spray.

tvbrian
Novice

Feb 10, 2008, 8:37 PM

Post #5 of 7 (104 views)
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Re: [mel] High pitched whistle, Zenith 27" [In reply to]	Can't Post

yes that is possible but i never had luck trying that, normally have to change the transformer if they will let you have one, prob try and sell you a new tv

rrobor
Veteran

Feb 11, 2008, 8:41 AM

Post #6 of 7 (98 views)
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Re: [tvbrian] High pitched whistle, Zenith 27" [In reply to]	Can't Post

Take the transformer out. tie a thread to it and dip it in a can of polyurothane and leave submerged for several minuits. take out and hang above can to drip . brush excess off and let dry. Small transformers with ferrite or metal bases a small squirt of silastic between the base and board. works every time. Yokes that whistle whilst with a manufacturer we tried painting and spraying, that did not work. dipping did. Problem was it takes about a week to have the smell reduced enough.

tvbrian
Novice

Feb 11, 2008, 9:42 AM

Post #7 of 7 (97 views)
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Re: [rrobor] High pitched whistle, Zenith 27" [In reply to]	Can't Post

Hi Thanks for the info. pity i didnt have it a few years ago i have retired now thank god, still like mucking around with me own stuff, i wonder if the guy whos thread this is has got his zenith sorted, have a good day now. Brian Smile

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