HELP!! Polaroid 3211-TLXB

[mopower440]

Hello, I have a polaroid 3211-TLXB, built in may 2007. I love the tv but it has started acting up, and it is very random when it decides to act up. I can be watching it and all the sudden it shuts off, and when it does this, both the red light (standby) and blue light (on) also dissapear. When it does this, the ONLY way to get it to come back on is to unplug it for about 10 minutes and wait. Then plug it back up and the red light will be back and i can turn it on and will be fine..It may not do this again for another week, or it may do it again in 20 minutes, very random. Been doing this for a while now, and like i said, sometimes it may go a week before doing it again. 2 times when it did it, it squealed really loud when it did it, but normally it just shuts down..This doesnt really sound like the bad caps issue but figured i better ask to see for sure..
Any ideas on this?
Thanks

[sordids999]

Re: HELP!! Polaroid 3211-TLXB

Any pictures of your boards may help you more with fixing your problem

[nomoresonys]

Re: HELP!! Polaroid 3211-TLXB

Hello, I have a polaroid 3211-TLXB, built in may 2007. I love the tv but it has started acting up, and it is very random when it decides to act up. I can be watching it and all the sudden it shuts off, and when it does this, both the red light (standby) and blue light (on) also dissapear. When it does this, the ONLY way to get it to come back on is to unplug it for about 10 minutes and wait. Then plug it back up and the red light will be back and i can turn it on and will be fine..It may not do this again for another week, or it may do it again in 20 minutes, very random. Been doing this for a while now, and like i said, sometimes it may go a week before doing it again. 2 times when it did it, it squealed really loud when it did it, but normally it just shuts down..This doesnt really sound like the bad caps issue but figured i better ask to see for sure..
Any ideas on this?
Thanks

have similar problem with a sony, but it won't be good for a week, maybe til I turn it off, then no go just solid green.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

Any pictures of your boards may help you more with fixing your problem

I have not torn into it yet. Just wanted to run the problem by you all first and see if any of you thought it could still be the cap problem evn though the symptoms are not exactly the same as some..

[budm]

Re: HELP!! Polaroid 3211-TLXB

There are more than one version of this model, you can get the whole module pretty cheap.
http://www.shopjimmy.com/catalogsear...roid+3211-TLXB
It can be as simple as cold solder joints.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

what are you calling the module, the control box or?

[budm]

Re: HELP!! Polaroid 3211-TLXB

The whole control box which contains the power supply board and the main board.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

what one is it on that shop jimmy link you posted? It looked like they were all separate..?

[budm]

Re: HELP!! Polaroid 3211-TLXB

Since there are more than one version of this model, you need to take apart your TV to see which boards are used on your TV.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

Since there are more than one version of this model, you need to take apart your TV to see which boards are used on your TV.

ok i see what your talking about now. I will take it apart and check. Do you think buying that control assembly complete would fix the issue or is there still other parts that could be causing it? also, is that stuff at shopjimmy brand new or used?
Thanks

[budm]

Re: HELP!! Polaroid 3211-TLXB

There are T-CON board on the LCD panel, and then the Inverter board for the backlights.
You need to at least find out if the squealing sound is from the inverter board or from the power supply board.
These TV do have common failure in the power supply board and main board problem.
It is not well made TV, so to spend lots of money on this 7 years old 32" may not be good idea.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

There are T-CON board on the LCD panel, and then the Inverter board for the backlights.
You need to at least find out if the squealing sound is from the inverter board or from the power supply board.
These TV do have common failure in the power supply board and main board problem.
It is not well made TV, so to spend lots of money on this 7 years old 32" may not be good idea.

I know, i just hate to throw it out because when its working, it works great..Hate to throw it out unless its completely dead. Its only done the squeeling 2 times in the few years ive had it. when it acts up it usually just goes dead while watching it and when it goes dead, both the red and blue lights go out with it and i have to unplug it for a while to get the red light back, then i can turn it back on. I did notice that when it goes dead, if i look in the vents in the top of the tv, there is a light on in there and it doesnt go out like the rest of the tv does..

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

may try to just replace the 2 caps that are commonly bad with these polaroids and see what happens. The 2 caps are cheap enough..

[MagicSmoke]

Re: HELP!! Polaroid 3211-TLXB

I just repaired a PSU out of a Polaroid TLX-0321b. If it has this PSU in this pic http://assets.shopjimmy.com/media/ca...if3212xaph.jpg

Then replace all of them, the 2 most likely causing problems are the 450v ones right above where its marked Proview.

The smaller ones are underneath the heatsinks for the fets and get hot so their lifetime is reduced.

Total cost for mine with shipping from Digikey was 12$, its actually a little less as I ordered some spares also.

Edit... if you see a red led flashing inside when set is supposed to be powered on, then PSU has a fault.

[budm]

Re: HELP!! Polaroid 3211-TLXB

At this point we have no idea which version of the TV he has since no pictures are provided yet.
Power supply/inverter board combo with the typical bad 10uF 450V caps or power supply with separated inverter board.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

ok, i opened it up and got some pics, even though they refused to turn out good..





The caps all looked perfect no bulging at all, not in the least bit, EXCEPT for the big main cap, if you look in the pic, the end of it is bulging out but i think it may be made like that? The only thing i found was dust packed in tight around that big main cap and a few other components on the PS board, so i cleaned it out good with air.. also saw a few possible bad solder joints so i re-soldered them just to be sure. I got the TV on right now with the back off so if it goes out again, i can see if this red light on the PS board comes on like described in the above post..

The power supply model # is-MLT666A, then 200-poo-MLT666A-AH

The only thing on the other board thats beside the PS was a sticker with a bar code that says-FAR2075016957, dont know if thats the part# for that board or what but thats all its got..

[MagicSmoke]

Re: HELP!! Polaroid 3211-TLXB

What volt and uf are the 2 caps by the transformer? If they are 10uf 450v then they are bad. I used Panasonic EE series to replace.

The supply I repaired is different but still has the same 2 caps by the transformer.
They were not bulged, but when removed I could see where both had leaked around the leads.

Also all the caps under the heat sink need replaced whether they look bad or not. The high temp shortens their life.

EDIT... looked at a better pic of PSU on Sj, It does not have a fault led that I could find.

[budm]

Re: HELP!! Polaroid 3211-TLXB

OK, now we see the pictures of the boards, form what you describe the problem, it sounds like it lost the 5VSB, so you need to check that pin when the TV stops working, this 5V standby power supply is running 24/7.
Those two cap by the transformer (with sticker on top) are the filter caps for the 5VSB. There is small start up cap laying on it side next to Q3, that is the cap I suspect it to be bad, it will look normal but you need to check the capacitance and its ESR value.

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

2 nights in a row, i was laying in bed watching this tv and it went out. Both times i just rolled over and went to sleep instead of unplugging the tv. When i woke up the next morning, the red stand bye light was back on and i could power the tv on with the remote. SO i guess when this happens i dont have to unplug it to get the red light back unless i want it to come back on sooner than what it wants to..Like i said, its weird, when it goes dead, the red light either goes out also or at least goes real dim, but if i look in the vents in the back of the tv, there will be a white light that stays on. Its almost like it gets hot and shuts down..

[mopower440]

Re: HELP!! Polaroid 3211-TLXB

any idea what the white light is that stays on inside the tv when the rest goes dead and why this light stays on yet the rest of the tv goes dead?