36ZP48 Buzzing/Humming Noise?

L00py^ · 22-01-2005, 12:13 PM

If I mute the volume on the TV, I can hear a loudish humming noise even from 3-4 metres away. What could be the possible causes of this please?

Soapysoap · 22-01-2005, 12:22 PM

From my experience (from TV manufacture not repair ) The buzzing could either be from:
a) a loose lamination in a transformer.
b) Incorrectly assembled scan coil (no wax over copper wire)

The again I could be totally wrong. The TV repair guys will see something like this every week and hopefully a better informed answer will come from one of them
Soapy

spocktra · 22-01-2005, 12:51 PM

If you change from 100htz to progressive scanning does the noise/pitch change?. If so it is the processor.Only you can decide if that warrants exchanging the set.

L00py^ · 22-01-2005, 1:00 PM

Nope seems the same level whichever picture mode I use. If I put my ear to the TV, its seems to be generated at the back/right hand side of the TV. The right hand side if still viewing the TV screen or left if standing behind it.

The picture quality is great, so would prefer to keep the set. I have an engineer coming to hopefully fix a slight geometry problem next Monday, should I ask his advice then spoctra?

spocktra · 22-01-2005, 11:42 PM

Yes it wont hurt asking but the engineer hasnt got to live with the set.Almost certainly he will say its within manufacturers tolerances.So basically its down to you and if you can put up with this.I returned a panny pd30 for the same problem.

24-01-2005, 9:16 PM

Quote:

Originally Posted by L00py^

I have an engineer coming to hopefully fix a slight geometry problem next Monday, should I ask his advice then spoctra?

What is the geometry problem ? Did you contact Toshiba directly or go through your retailer ?

I have a slight issue with mine but not sure if it warrants a visit by an engineer.

L00py^ · 25-01-2005, 12:03 AM

I contacted JL, but went and sent an installation engineer out, so JL are having to contact Toshiba, so a service engineer can come out.

spocktra · 25-01-2005, 7:27 AM

Dont be fobbed off.By the sale and returns act,you are perfectly entitled to return the product if at all not happy.The engineer will always say "its within the manufacturers specs".This is to save the retailer/manucturer a few bob.

PeaJay · 25-01-2005, 9:43 AM

Quote:

Originally Posted by spocktra

If you change from 100htz to progressive scanning does the noise/pitch change?. If so it is the processor.Only you can decide if that warrants exchanging the set.

My Toshiba ZT29 does this.
I'm living with it normally.
It sometimes annoys me though

However, as this is the third set i've had due to this buzz I'm beginning to think this is a "feature".

As the TV is absolutly fantastic otherwise. It ticks all the boxes that I was after in a TV: Dolby Digital, IDTV, fantastic picture and sound (baring the buzz)

Is this fixable?
is it worthwhile getting an "engineer" out, or just living with it?

rockyglw · 25-01-2005, 4:52 PM

If the sound is a very high pitched whine then it could the same as I had with my Philips WS. My local TV shop changed a coil from one that had the windings covered with what looked like insulating tape to one with open windings. He then covered the windings with a sort of resin. This has completely cured the problem and cost aroung £40 to diagnose and fix. He said that the problem was caused by the windings vibrating when the picture is streched to fill the screen on a WS TV. He also said that it was quite common due to cheap components used in order to keep the price of TV's down and was usually curable by soaking the existing windings, if accessible or replacing the coil if not. Hope this makes sense to the TV engineers amongst you!!