Trouble with picture on Matsui plasma tv

[playman]

Hi there I was just given this 42" matsui plasma TV from a local repairshop becouse the client didint want to pay the repair charge and he just left it there.
The model number is 42mwp5005

It seems to be ok TV so I decided to try to fix it, and I wanted to see if any one has ever seen this simpton and might know where to start.

It starts up and "works"
when it's cold it takes some time for the pixels to shine, and kinda looks like
watching water sliding on a flatt surface in slow motion I don't know how to descripe it in any other way

I took 3 pictures to show how terrible the resolution is.

So, does any one have any idea what this could be?

[tom66]

Re: Trouble with picture on Matsui plasma tv

Classic bad Z-sustain.

Could just be the fuse...

If it's an LG chassis, it might be the hybrid (around £30.)

Most Matsui plasmas are not HD though. Keep in mind non-HD plasmas (EDTV) are usually only worth around £50 in my part of the country. I'm not sure if it is different in Iceland.

[playman]

Re: Trouble with picture on Matsui plasma tv

Classic bad Z-sustain.

Could just be the fuse...

If it's an LG chassis, it might be the hybrid (around £30.)

Most Matsui plasmas are not HD though. Keep in mind non-HD plasmas (EDTV) are usually only worth around £50 in my part of the country. I'm not sure if it is different in Iceland.

lol £50?
this piece would probably sell for atleast £250 if not £300 here.
well I got it for free and could spend some cash into the repair to make it work again.

could you tell me where I might find this fuse, or where I should search for it.
I'll post some Pics soon of the inside

[tom66]

Re: Trouble with picture on Matsui plasma tv

lol £50?
this piece would probably sell for atleast £250 if not £300 here.
well I got it for free and could spend some cash into the repair to make it work again.

could you tell me where I might find this fuse, or where I should search for it.
I'll post some Pics soon of the inside

I'm not sure without pics - get them up as soon as possible.

[playman]

Re: Trouble with picture on Matsui plasma tv

Allright I just finished taking the pictures, so far as i've noticed there are 2 bulged capacitors, wich I have circled on the pictures.

Before I go and replace the caps, there must be some reason for them to bulge right?
what could that be?

Could the bad screen be becouse of the bulged caps?

[tom66]

Re: Trouble with picture on Matsui plasma tv

The first bad cap you've circled is simply the black disc bulging, not the actual capacitor. It is common due to heat. However, the cap with the bulged vent -is- failed.

The bad screen probably isn't caused by the vented cap, however the board may have been damaged by it failing as it is sometimes the responsibility of that cap to absorb the voltage spikes caused by the high current switching.

The fuses are the two white cylindrical objects near the power connector in the fifth photo. Test the fuses for continuity: use the 200 ohm range on your meter - measure the fuse - you should see less than 1 ohm for a good fuse. Do this without power applied to the TV. The board on the right connected to the plasma panel is the Z-sustain.

[playman]

Re: Trouble with picture on Matsui plasma tv

Allright just checked the fuses, the one with the red mark is 6.3A and is fine (gave me 1.3Ohm)
the other one wich is 4A is apperently dead as it gave me no reading.

so where do I stand if I change the bad cap and the fuse on picture 5?
is this just "normal" or do I have to do more searching?

[tom66]

Re: Trouble with picture on Matsui plasma tv

Allright just checked the fuses, the one with the red mark is 6.3A and is fine (gave me 1.3Ohm)
the other one wich is 4A is apperently dead as it gave me no reading.

so where do I stand if I change the bad cap and the fuse on picture 5?
is this just "normal" or do I have to do more searching?

I have encountered one plasma TV where the fuse was simply blown and replacing it fixed the problem - it had the same poor picture symptom. Change the cap, then the fuse. What is the rating on the failed cap?

[playman]

Re: Trouble with picture on Matsui plasma tv

What is the rating on the failed cap?

250v 47uf 105°c

I'll drop by the shop tomorrow and buy the cap and fuse.

[tom66]

Re: Trouble with picture on Matsui plasma tv

250v 47uf 105°c

I'll drop by the shop tomorrow and buy the cap and fuse.

Only use a decent high voltage cap. I suggest Chemicon KMG/KMH for replacement.

[playman]

Re: Trouble with picture on Matsui plasma tv

Only use a decent high voltage cap. I suggest Chemicon KMG/KMH for replacement.

Allright i'll keep that in mind, just a question if they have them.

[lti]

Re: Trouble with picture on Matsui plasma tv

I'm not sure that the cap in the second picture is actually good. The other two identical caps would have probably been exposed to the same amount of heat.

[playman]

Re: Trouble with picture on Matsui plasma tv

I'm not sure that the cap in the second picture is actually good. The other two identical caps would have probably been exposed to the same amount of heat.

I was able to press down the plastic bulge on the big cap and it popped right back up, meaning it felt like bulged plastic.
but what do I know, right that's why i'm here.

[lti]

Re: Trouble with picture on Matsui plasma tv

That is good. It means that the cap isn't bulging.

[playman]

Re: Trouble with picture on Matsui plasma tv

Just got the spare fuse and 47uf cap wich is 400v rated not 250v but that should not matter.
hopefully i'll be able to get the TV together tonight and test it.

Altough I did not like the smudge on the board and heat signs below the big cooling plate,
but I guess time will tell.

[playman]

Re: Trouble with picture on Matsui plasma tv

Allright I just finished replaceing the cap and fuse, and the picture has not changed.
Altough the "water" thing did not show up.

As I was talking to the repair man, he was afraid that the thing under the heatsink might be broken.
And I guess there is no way of fxing that?

[tom66]

Re: Trouble with picture on Matsui plasma tv

Allright I just finished replaceing the cap and fuse, and the picture has not changed.
Altough the "water" thing did not show up.

As I was talking to the repair man, he was afraid that the thing under the heatsink might be broken.
And I guess there is no way of fxing that?

Yes, there is a way of fixing that. It's just expensive (~£30) and difficult (very difficult to desolder, but it has been done before.) Is your new fuse blown?

[playman]

Re: Trouble with picture on Matsui plasma tv

Yub the new fuse is blown :/
Do you know if there are any pictures or anything regarding the fix so I could see how difficult it is?

Is there no way of buying a new/used board, or is that much more expensive then trying to fix it?

[tom66]

Re: Trouble with picture on Matsui plasma tv

Yub the new fuse is blown :/
Do you know if there are any pictures or anything regarding the fix so I could see how difficult it is?

Is there no way of buying a new/used board, or is that much more expensive then trying to fix it?

What's the board part #?

Someone else with the same/similar problem: https://www.badcaps.net/forum/showthread.php?p=234851

I've never done it myself thankfully, so I'm not much help.

[playman]

Re: Trouble with picture on Matsui plasma tv

Part #: 6870qze013c

I did a quick search and came up with this.
http://www.ebay.com/sch/i.html?_nkw=...&_osacat=71582

2 sales look interesting, 1 has just the ZSUS board and the other one has the whole plate, both cost about the same.
So I would probably just buy the whole board and skip the hazzle of having to desolder and solder.
(unless you know where I could get it cheaper)

I was also wondering, would it matter if I would plug a fan on the heatsink?
this kinda looks like the plate might some heat problem.

The stupid plastic holding the pins on the wire broke, not the board socket itself but the plug,
do you know if the wires are hard to come by? it's the wires for the P2 plug.