I have got a Matsui TV (link:
http://www.currys.co.uk/martprd/stor... category_oid=)
which I picked up from currys a while back. It has this strange noise
though. When the screen shows White or bright colours it gives out a
high pitched noise, but is silent for black. Is this a fault?

"naza" wrote in message
...
I have got a Matsui TV (link:
http://www.currys.co.uk/martprd/stor... category_oid=)
which I picked up from currys a while back. It has this strange noise
though. When the screen shows White or bright colours it gives out a
high pitched noise, but is silent for black. Is this a fault?

It could be a loose ferrite core in the line O/P transformer or possibly the
line driver transformer, the PSU chopper transformer can also be a suspect.

Opinions vary on what to use but I've found superglue usually does the
trick - or if "a while back" means so recent there's still a warranty, take
it back and complain.

a ringing transformer with a lose or cracked ferite core
or bad cap in EHT circuit

"naza" wrote in message
...
I have got a Matsui TV (link:
http://www.currys.co.uk/martprd/stor... category_oid=)
which I picked up from currys a while back. It has this strange noise
though. When the screen shows White or bright colours it gives out a
high pitched noise, but is silent for black. Is this a fault?

"ZACK." wrote in message
u...
a ringing transformer with a lose or cracked ferite core
or bad cap in EHT circuit

"naza" wrote in message
...
I have got a Matsui TV (link:
http://www.currys.co.uk/martprd/stor... category_oid=)
which I picked up from currys a while back. It has this strange noise
though. When the screen shows White or bright colours it gives out a
high pitched noise, but is silent for black. Is this a fault?

Any inductor, including ferrite beads attached to component leads, may
resonate at SMPS and /or Horiz Deflection frequencies. These may be
difficult to diagnose without a good ear and a nonconductive probe to
actually touch the noise emanating devices to confirm what is singing out
the rhythm.

On 15 jun, 05:08, naza wrote:
I have got a Matsui TV (link:http://www.currys.co.uk/martprd/stor...essionID=@@@@0...)
which I picked up from currys a while back. It has this strange noise
though. When the screen shows White or bright colours it gives out a
high pitched noise, but is silent for black. Is this a fault?

quite common. not usually a fault. often a blob of superglue on the
coil cores near the line stage stops the singing! or a gentle tap on
the case of the set.
-B