I messed up and didnt pay attention when I removed the 10V and 16V caps, so now I dont know where the 16V cap goes (they are similar in size). I bought many 10V and only 2 16V, so I cant replace all with 16V. Please help!!
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replacing the 10V caps with 25V caps is perfectly fine. In fact, if it was manufactured like that, those caps may not have blown. Replacing a 680uF with a 1000uF could be problematic depending on it's function. 680uF is pretty specific when 500uF and 1000uF are much more common and therefore cheaper - one would think that the engineers would have tried using those in the design rather than a 680uF - makes me think the value of the cap is important to the frequency of the circuit it's in. Other concerns might be whether he got any of them in backwards or not. That's a rookie mistake, but still an easy enough one to make (for a rookie). Also, with that many swollen caps, I wonder if there were any that leaked out the bottom before swelling at the top (IE - if some caps were missed in the replacement procedure) Also, with that large a number of caps gone, other components may have been compromised or blown. I'd be testing the transistors around those caps (most likely punched through rather than open), looking for fusible links (surface mount fuses, 0 OHM resistors) that may have opened up etc. The initial attack on the problem was basically correct, and in many cases probably would have fixed it (if say the 680uF cap was functioning as a ripple filter). But when that didn't fix it, a deeper analysis should have been done to complete the repair (including locating a 680uF cap).
The most likely cause of your problems: Power Supply!!! This model (and most of the Samsung LCDs of this same year) had problems with filter capacitors on the SMPS (swith mode power supply). The first thing you should do is remove the rear cover and inspect the power supply. You will want to focus your attention on the capacitors (they looks like little cans... plastic wrapped with metal tops) near the plug which connects the SMPS to the Main board (has the input connectors on it). The tops of the caps are nearly always swollen and puffed up on these capacitors when they are bad. I recommend replacing the caps with the same value, but at a slightly higher voltage rating. ex.: replace a 1000uf, 10v cap with a 1000uf, 16v cap.
When I replace caps in this model, I replaced all the caps (4 (1000uF by the heat sink, 1 (470uF) by the inverter transformer) for the 5v and the 12v since you cannot 100% relying on just by looking bulging tops. I am not sure why your has 3-470uf. See my example here: http://s807.photobucket.com/albums/yy352/budm/Princeton%20VL2018W/
You need to replace the power board,Or replace the capactors on it.
Replacing the capactors is the best idea.They are under rated at 10volt insted of 16volt or higher. They cost less too. If you replace the board,you will still have the same problem again later. They are usualy 680uf 10v,1000uf 10v,2200uf 10v,and 3300uf 10v. Replace them with the same uf but 16v or 25v EXPANPLE use... 1000uf 16v or 1000uf 25v
They are polorised Blak spot on board is the - side of cap. Stripe on cap is -. The caps. swell if they are bad. The tops round out,or the X on top breaks anfand black or brown goo comes out. Top should be flat. It I can assist you further please feel free to ask. firstname.lastname@example.org
same thing happened to my ilo. There are four capacitors that are bad
on the power board. You can usually tell its bad because at the top it
bulges out. Here is what you need to do. Unplug the tv, open up your
ilo find the power board ( the power cord plugs into it). Then find the
capacitors that are bad (they are the around things usually in blue
color) and remove them by soldering the other side. On mine there where
three 1000uf 16v and one 470uf 35v. Those are the ones that need
replacing. I replaced them with a higher voltage rating 1000uf 35v and
470uf 50v. All you need to do is solder them back on but make sure you
solder them back the right way (plus goes to plus on the board or you
will be in trouble). I found the capacitors at radio shack for about
1.50 a peice. If you dont know how to solder look it up on youtube. If
that does not work there might be couple more bad capacitors that need
replaceing just need to find them and you can tell by a small bulging
You can change the voltage rating to a higher one without compromizing the circuit. You can not lower the value however. In other words, using a 1000uF cap rated at 16V would be OK. The short answer is no, you can not use the extra caps you have unless you put 3 of them in series. (I doubt you have the space for that.)
I have a philips 19 lcd. the damn thing just display a white screen with the word aging in red in the certer. it goes off after a while, turn black a while then comes back again, with the white screen. keeps doing it over and over.
anybody have any idea? i tried caps, but all the caps look good. to be noted i didnt change all.
I have to assume that your post is some question concerning the SMPS on the Akai TV and then further assume that you're dealing with a dead condition??? That given, you probably need to replace several caps on the SMPS that can be ordered as a kit. The kit supplies 19 caps in-all (4) 3300/35v, (8) 2200/25v, (6) 1000/10v and (1) 1000/16v the last seven 1000uf caps can all be 16v if you order the smaller style.
That is assuming you are experiencing a dead condition on your set. It is best if you can give a tech a little more to go on than "power suply" if you're actually wanting any real help.
Replace 19 caps in the power supply, 4) 3300uf/35v, 8) 2200uf/25v, 6) 1000uf/10v, 1) 1000uf/16v and ESR the remaining caps for good measure. That should repair the problem in about 99% of the cases. I do several of these a month...