Viore PDP42V18HA Power Supply.

[Vizor]

lg-3501q00156a-power-supplyusp440m42lp


Hearing like a Chirping Clicking noise, that's really fast and really annoying, its in the area that i have pictures for can't figure out what it is.

[retiredcaps]

Re: Viore PDP42V18HA Power Supply.

Do you have 5V DC standby?

[Vizor]

Re: Viore PDP42V18HA Power Supply.

5VCtrL / 5.06v
VS / 184.0V
VA / 59.7V

[Vizor]

Re: Viore PDP42V18HA Power Supply.

http://youtu.be/8Ahq-0AoP2k

Video of the issue to make it more clear of what i am hearing.

[Vizor]

Re: Viore PDP42V18HA Power Supply.

anyone?

[selldoor]

Re: Viore PDP42V18HA Power Supply.

Try resoldering the large pins in last two pictures.

Does the set actually work apart from the noise?

[Vizor]

Re: Viore PDP42V18HA Power Supply.

everything works, all but the z sus board is screwed. Colored Dark blue specks etc already know that's bad

Power supply was making the noise, replaced 2 bad caps didn't make a difference.

[tom66]

Re: Viore PDP42V18HA Power Supply.

Use some superglue on the chirping component. (Locate it exactly with a cylinder, e.g. made from paper) The windings are vibrating because the old varnish has dried up.

[Nocta]

Re: Viore PDP42V18HA Power Supply.

Check these transformers for cracks (there may be barely visible cracks). I heard about these kind of problems.

For what I heard on your video, these one are causing the sound.

[Vizor]

Re: Viore PDP42V18HA Power Supply.

Which Transformer Powers the z sus board anyone know?

[Vizor]

Re: Viore PDP42V18HA Power Supply.

Anyways, i was reflowing some solder and i came across 2 of those 5W15 J B A R O their are a few on the board elsewhere that don't look nearly as bad could those be making that noise?

[tom66]

Re: Viore PDP42V18HA Power Supply.

Anyways, i was reflowing some solder and i came across 2 of those 5W15 J B A R O their are a few on the board elsewhere that don't look nearly as bad could those be making that noise?

Probably not. They are "cement" resistors. A wire is coiled inside to make the required resistance and it is then encased in the ceramic white body - usually this prevents the wire from moving.

[selldoor]

Re: Viore PDP42V18HA Power Supply.

I notice this is a second thread concerning this same set - please dont do that - its difficult enough following one- and vital information in one may not be in the other.

[Vizor]

Re: Viore PDP42V18HA Power Supply.

The other post focused on the whole TV this is just the power supply and also no one would reply back to the other thread.

[Nocta]

Re: Viore PDP42V18HA Power Supply.

I don't think a resistor could cause the sound. It's more likely in components like transformers or coil windings because those components produce little vibrations.

[Vizor]

Re: Viore PDP42V18HA Power Supply.

using a stethoscope i have pin-pointed the noise coming from the marked areas on the power supply, what does this area power/control?

[tom66]

Re: Viore PDP42V18HA Power Supply.

The yellow one is the PFC inductor. The other items are the mains filters. You can try applying glue to the mains filters to see if it fixes it.

[Vizor]

Re: Viore PDP42V18HA Power Supply.

Will the noise actually hurt anything long term?

[tom66]

Re: Viore PDP42V18HA Power Supply.

Will the noise actually hurt anything long term?

It shouldn't. The glue is normally present on the inductors, but it dries up over time so it becomes much more audible.