samsung UN22D5010 no power

[jose6326]

Re: samsung UN22D5010 no power

it is a non "Z" version
i got this pdf from Digikey

they said it is a possible equivalent to the original

[tom66]

Re: samsung UN22D5010 no power

It just looks to have a few additional features, the main functionality is unchanged and it should work fine.

[jose6326]

Re: samsung UN22D5010 no power

sounds good tom

but i may have found the actual IC i need

im just waiting on the sales guy to email me if they have it in stock

if they do not have it or it has a long lead time i will just order the one from ebay or digikey

thanks

[jose6326]

Re: samsung UN22D5010 no power

I can not find the original IC
So I ordered one from digikey and one from ebay
Now I play the waiting game
I will post after I solder and reinstall the board
Hopefully this will fix the issue

[jose6326]

Re: samsung UN22D5010 no power

hey tom im thinking of buying this o scope
do you think it's worth buying for diagnosing issues on lcds and plasmas?

it is a simpson dual trace o scope model number 452

[tom66]

Re: samsung UN22D5010 no power

It is probably only just about good enough for most uses, but how much will it cost you? I would pay up to $30 for that, because it would be useful for most repairs, but may struggle on some types of diagnosis.

[jose6326]

Re: samsung UN22D5010 no power

he was asking 75 but i got him down to 50 bucks

[jose6326]

Re: samsung UN22D5010 no power

Ok I installed the new ic and the fuse

I plugged in the power cord and there is still no power
No led on the front

What do I test now?

[capkid]

Re: samsung UN22D5010 no power

Did you ever completely test the components surrounding that bad IC? I had a similar IC in a Vizio that took out three to four components when it burned.

[jose6326]

Re: samsung UN22D5010 no power

Here is a pic of the surrounding components
New Ic is under heat sink

How should I test each component?

[capkid]

Re: samsung UN22D5010 no power

It looks like the IC mostly blew out to the right, but I'd test these components. You may have to de-solder one of the leads on each component if your readings are questionable:

- Resistor (RM805): Ohm scale on meter.
- Diodes (DM801 and DM802): Diode mode on meter. Place your meter leads on each lead of the diode, respectively, record the reading, then swap your meter leads. You should get a reading in one direction (something like 0.5V) and no reading in the opposite direction.

The blue cap to the right of JP825 appears to be fine. I'd also flip the board over to look for components in the vicinity that could have been damaged.

[budm]

Re: samsung UN22D5010 no power

See redline.

[jose6326]

Re: samsung UN22D5010 no power

It actually blew out to the right and forward towards the transformer

I think I found a shorted diode

DM801: 0.470
Dm802: OFL

RM805: 0.5 ohms
CM809: 6.95 ohms then it starts to go down

Blue cap next to JP825 reads OFL on ohm setting

[jose6326]

Re: samsung UN22D5010 no power

I just found a blown component

Its one of the extremely small chips
I dont know what its actually called

Is this difficult to remove and replace?
How am I suppose to figure what part number this and order?

[capkid]

Re: samsung UN22D5010 no power

It actually blew out to the right and forward towards the transformer

I think I found a shorted diode

DM801: 0.470
Dm802: OFL

RM805: 0.5 ohms
CM809: 6.95 ohms then it starts to go down

Blue cap next to JP825 reads OFL on ohm setting

Your readings don't look complete. The diodes need to be read with the meter leads on opposite leads of the component then you swap them to take a second reading: Two readings per diode. It looks like your resistor is shorted, though. I'd remove the resistor and test it off the board. A burn mark on a resistor is usually a bad sign.

Bud may have a better idea on that burned component on the backside of the board. Is it in the vicinity of the burned IC on the front of the board?

Edit: Never mind. I saw the JP825 jumper and realized that the component on the backside is near the bad IC.

[budm]

Re: samsung UN22D5010 no power

Can I see the bigger picture on on that back side so I can see how that blown IC are connected to the blown part? Make it JPEG.
That blown device ICM851 is going to be hard to know what it is.

[jose6326]

Re: samsung UN22D5010 no power

Yes the burned component is near the newly repkaced ic

Bud I am taking pictures with my note2
So im not sure if I can make tbe pics jpeg

[jose6326]

Re: samsung UN22D5010 no power

I hope the pics are good enough

They are both the same I just boxed the location of the new ic and the burned component in yellow

If you need more pics let me know

Thanks for all the help

[budm]

Re: samsung UN22D5010 no power

OK, that part is more likely to be the ref Diode which is part of the regulation feedback. Since it burnt so bad, that means the surge must have come through the Cold secondary side of the circuit, so more likely you will have more damaged parts in the power supply and the main board.

[jose6326]

Re: samsung UN22D5010 no power

So should I just search for the psu board and main board on ebay or should I continue to go down the line and locate each individual defective component?