Sound defect in Sony KV2170GE

I have 21" Sony CRT tv, model KV2170KV which looses its volume gradually from loud to soft and evantually ends up buzzing. This happends intermittently.

I've tried to knock the TV when the fault appears but this doesnt help. So an dry joint might not be the problem.

Recycling the power to the TV sometimes solves the problem. Any idea where can I start? Thanks in advance.

 

[Sjouke Burry]

vernondopaul@gmail.com wrote in
news:f5c1e2db-793d-4f66-b7da-27a049adca22@googlegroups.com:

I have 21" Sony CRT tv, model KV2170KV which looses its volume
gradually from loud to soft and evantually ends up buzzing. This
happends intermittently.

I've tried to knock the TV when the fault appears but this doesnt
help. So an dry joint might not be the problem.

Recycling the power to the TV sometimes solves the problem. Any idea
where can I start? Thanks in advance.

Some component overheating?
Try a cold spray around the circuit involved.

 

[Ian Field]

<vernondopaul@gmail.com> wrote in message
news:f5c1e2db-793d-4f66-b7da-27a049adca22@googlegroups.com...

I have 21" Sony CRT tv, model KV2170KV which looses its volume gradually
from loud to soft and evantually ends up buzzing. This happends
intermittently.

I've tried to knock the TV when the fault appears but this doesnt help. So
an dry joint might not be the problem.

Recycling the power to the TV sometimes solves the problem. Any idea where
can I start? Thanks in advance.

Sounds like the sound intercarrier filter is drifting - if so; the buzz is
video getting into the sound demodulator.