polaroid tla-04011c

[mochamedics]

hello all trying to fic my lcd tv to start with i got it you had to turn it on blue light came on flashed for a second then nothing i left it on 10 minutes turned it off then back on worked great . so i used it just warmed it up ,then about a year ago just the red light , bought a main board not power supply board off ebay and it worked again as long as you warmed it up lasted a year now it turns blue light on flashes for a sec then blank no matter how long you warm it up,took back off looking for bad caps no buldge or burn .today it will turn blue light on flash and wont turn off just blue light on .i have a volt meter and am pretty good at fixing stuff any advice would be great thxs

[budm]

Re: polaroid tla-04011c

Please post the good clear pictures of the whole chassis, and then closed up pictures of each boards and connectors, then later on when you take the suspected board out, then we will need the top side and back side of the board. But lets see what the whole TV and the connectors, caps look like first. I think the problem will more likely to be in the power supply.

[mochamedics]

Re: polaroid tla-04011c

here are 3 pics ill remove power supply

[mochamedics]

Re: polaroid tla-04011c

here is power supply front back finer quality

[budm]

Re: polaroid tla-04011c

Are there any voltage labeling on those white connectors on the power supply board, right now your standby power supply is working.
Do you also still have the old control board, did you try that to see if you have the same symptom?

[mochamedics]

Re: polaroid tla-04011c

v1 gnd v2 remote on top left bottom left is gnd ,v3 no values old board was trashed over a year ago , ps thanks for the help if i know the caps that go bad i can replace them ,

[mochamedics]

Re: polaroid tla-04011c

bump

[selldoor]

Re: polaroid tla-04011c

BUMP !!! where/who do you think you are??
You will be lucky to get any help at all doing that.
You have to be patient with people here: we nearly all have jobs, college and families in the real world and we just help out when we can. I'd guess most of us are not qualified technicians, and just pass on what we have learnt.

In any case your pictures are very poor - we will not waste our time trying to look at them. - That is why over 80 people have looked at the post and given up!

As regard the caps make a list of all the Electrolytic ones - make voltage - uf we dont know what is on the board or if they are any good - are any leaking or bulging.
Are they on the list of Bad/ not very good caps.
Have you looked for a schematic / service manual for the set/power board.

[mochamedics]

Re: polaroid tla-04011c

wow little rude arnt we didnt know i upset you like that if you cant help then dont bother being rude .

[budm]

Re: polaroid tla-04011c

1) The pictures qualities are very poor, I have a hard time tracing out the bottom side of the board.
2) Please see the attached PDF, and tell us the voltage reading on the large cap is so we can tell if the PS_ON and PFC is working or not.

[mochamedics]

Re: polaroid tla-04011c

sorry about pics from before these are much better and on main cap 409 is reading when on

[budm]

Re: polaroid tla-04011c

Wells, thanks for the pictures, but they are still way out of focus, I cannot read the designators (white printing to show Rxxx, Cxxx).
Since you are getting about 400Vdc on that large cap, more likely the PS_ON is working and it is turning on the PFC Voltage boosting circuits, but not the 24Vdc switching power supply section.
Please see the PDF, I need REALLY GOOD CLEAR pictures and we need to find the P/N as printed on the two IC's as shown.

[mochamedics]

Re: polaroid tla-04011c

part number are big chip l6598d(top) sti emblem then 91c3638 (bottom) small chip 1653a pnin

[budm]

Re: polaroid tla-04011c

OK, I will look up the spec sheet tomorrow, it getting late here. Please also post clear pictures in the red area for me.

[retiredcaps]

Re: polaroid tla-04011c

I need REALLY GOOD CLEAR pictures

An example of what budm is talking about

https://www.badcaps.net/forum/attach...1&d=1290283049

[mochamedics]

Re: polaroid tla-04011c

here is a good pic

[mochamedics]

Re: polaroid tla-04011c

i can get a used power supply for 40 bucks

[budm]

Re: polaroid tla-04011c

That is cheap! But I like to verify things just to be sure, but we can only do so much from long distant.

[mochamedics]

Re: polaroid tla-04011c

yep if you look on the net by part number there is lots of them for around 40 some are 80 just bypass them lol