Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Early Color Television

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 12-28-2002, 11:55 PM
opt80's Avatar
opt80 opt80 is offline
AK Member
 
Join Date: Nov 2002
Location: Stratford,Prince Edward Island
Posts: 43
TV Help

Need some expertise on TVs,My mother has a 27 inch Sanyo,nice tv.
Sometimes ,especially when it is first turned on it gives a high pitched hum.The dealer has been,to be kind,useless.
A competitor said that "a something or other"was vibrating within the set.It is annoying at first but once the set heats up it goes away.Any Thoughts?

Best,
opt80
Reply With Quote
  #2  
Old 12-29-2002, 01:01 AM
Eric H's Avatar
Eric H Eric H is offline
Administrator
 
Join Date: Jun 2002
Location: So. Calif
Posts: 11,565
Degaussing

The noise is probably the Degaussing coil humming.

The coil is used to demagnetize the CRT and only kicks in for a couple seconds when the set is cold.

The metal shield around the CRT may be vibrating from the 60 cycle magnetic field.

Basically this is normal operation.

Oh wait, you said a high pitched noise...

Your Flyback transformer or Yoke could be singing, this will be a very high frequency noise, also normal to a certain extent however loose windings on either of those components can sometimes be tightend up to reduce the noise.

Eric

Last edited by Eric H; 12-29-2002 at 01:05 AM.
Reply With Quote
  #3  
Old 12-29-2002, 08:21 AM
opt80's Avatar
opt80 opt80 is offline
AK Member
 
Join Date: Nov 2002
Location: Stratford,Prince Edward Island
Posts: 43
Hi Eric

Thanks for the info I'll pass that along to the dealer on monday!!

Best Regards

Alan
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:39 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.