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Want to know if I can replace a capacitor of 680uf 50v with a capacitor of 1500uf 35v on a plasma main power supply.

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NO. The capacitance must be the same. The voltage can be higher but never lower.
So you will need a capacitor of 680uf 50v. A capacitor with a higher voltage rating will work. They just cost more.
So for the power supply;
> Use ones with the Low Equivalent Series Resistance ESR rating
> Use ones with the same farad rating

> Use ones with the same or higher voltage rating
> Use ones with high temperature rating

Give this information to your parts supplier and they will get the right part.

Posted on Mar 25, 2011

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Won't print dark enough


Forget buying a new toner cartridge and don't bother re-installing anything - This is a power supply problem - The electrolytic capacitors fade away after a few years of power on and the high voltage to the printing engine drops too low.I tried a new toner cartridge - no help - re-installed drivers - no help.If you can handle a soldering iron or know a friend who can, replace the following capacitors on the power supply board on the LHS (power cord side). Make sure you use low impedance 105 degree power supply types. Warning - high voltage !!! power cord out and wait 30 minutes before touching anything.
C374 341 503 529 (47uF/35V), C526 (1uf/50V), C506 (0.47uF/35V), C515 (100uf/50V). All the others tested fine in mine. Also make sure you install them the correct way around!
Now I have "black as black can be" prints just like new and I can set print density back to 2 not 5.
enjoy ;-)

Apr 24, 2012 | HP LaserJet 3030 All-In-One Printer

2 Answers

Model FLM-3701 will not power up.


There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V. How ever, capacitors are more likely to fail on this television.
The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light.
This P/S board is easy to access on this TV. There is a cover on the back of the TV. It is attached with 8 screws. Remove the cover. This will expose 2 boards. The power supply board is on the right. To remove the P/S board, first unplug the cables. There is an AC power power cord on the right and 4 data cables on the left. The board is held in with 4 screws. Remove the screws and the board will lift out. Any capacitor that is swollen is bad. The top of the capacitor will be curved upward. On the left side of the P/S board, there are 9 big caps labelled E8 thur E17. I would suggest replacing all of them. 6 are 680uF 35V and 3 are 680uF 25V. In the upper central region there are 3 small caps. These go bad, but they do not swell. These are E6, E7 and E22. They are all 22uF 50V. Replace all three. The attached photo shows before and after the caps have been replaced. The original caps were orange. The replacement caps are black.

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-0.jpg

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-1.jpg

model-flm-3701-will-not-power-up-1onojclnad5aenzciu2mb45v-1-3.jpg

Dec 07, 2011 | Polaroid Televison & Video

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HI, I have a Philips tv model no: 23PFL5522D/05 and the red light has started to flash one long and two short what has gone wrong with it please?.


Change C82 (1500uF/16V), C83 (1500uF/16V) and C84 (680uF/16V) on the external power supply.

Let me know what happens after that.

Apr 07, 2011 | Televison & Video

1 Answer

Failed Repair Job. A friend of mine called a loocal repair shop to fix their LG50PC3D 9 x 10V 3300uf 105c Capacitors on the Power Board were swollen 1 x 50v 680uf 105c Capacitor on the Power board was...


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).

Feb 27, 2011 | LG 50PC3D 50 in. Plasma Television

2 Answers

Have a polaroid lcd that fizzled. blue light


The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light.
This P/S board is easy to access on this TV. There is a plastic cover on the back of the TV. It is attached with 8 screws. Remove the cover. This will expose 2 boards. The power supply board is on the right. To remove the P/S board, first unplug the cables. There is an AC power power cord on the right and 4 data cables on the left. The board is held in with 4 screws. Remove the screws and the board will lift out. Any capacitor that is swollen is bad. The top of the capacitor will be curved upward. On the left side of the P/S board, there are 9 big caps labelled E8 thur E17. I would suggest replacing all of them. 6 are 680uF 35V and 3 are 680uF 25V. In the upper central region there are 3 small caps. These go bad, but they do not swell. These are E6, E7 and E22. They are all 22uF 50V. Replace all three.
polaroid-lcd-fizzled-blue-light-1onojclnad5aenzciu2mb45v-1-0.jpg

Dec 22, 2009 | Polaroid FLM-3701 Television

1 Answer

My dell w3000 tv wont power on


There are likely bad capacitors on the power board. You will need to replace 4 capacitors, labeled c101, c304, c305 and c404. I used 3 50v 33uf and 1 50v 47uf capacitors. The originals are 35v 33uf and 35v 47uf. Replacing these should fix most power board issues.

Dec 20, 2009 | Dell W3000 30 in. HD-Ready LCD Television

1 Answer

50 inch plasma blank screen


I bought my Philips Magnavox 50" plasma in June of 2007. In february of 2009, I noticed increasingly longer delays in the video coming on after turning on the power and then the audio began to delay coming on. After a few weeks of this problem the audio and video then stopped coming on at all. However, there was power going to the unit because the green power light was working. I noticed over 50 other consumers on this website had the same problem. WITH THE HELP OF OTHERS ON THIS WEBSITE, I HAVE FIXED THE PROBLEM FOR $40. YES, FOR LESS THAN $100.00 I HAVE A WORKING HDTV AGAIN, BUT WITH NO THANKS TO PHILIPS - MAGNAVOX. THEY WERE USELESS. 

HERE IS THE FIX:

1. Unplug your power supply cord.
2. Remove back panel on your HD.
3. Look for capacitors that have a bubbled or slightly raised and rounded top. This indicates the capacitors have overheated or leaked and need to be replaced. The normal look is a flat surface with no raised features at all. (I had two bad capacitors that were side-by-side and identical: 3300uf 10v. Also, they should be located on the power supply board. My power supply board is in the middle of my 50" plasma.) 
4. Go to an electronics repair store or Radio Shack and see if they carry your capacitor type and size and replace them yourself if you are comfortable with removing the capacitors and soldering new ones to the power supply board. The capacitors will cost you $2.00 each or less. 
5. I was not comfortable replacing the capacitors myself so I removed the power supply board by removing the screws and unplugging several wire connections. This was not difficult at all. I then brought the power supply board to a local electronics shop that did repairs on HDTVs and simply asked them to remove the bad capacitors and solder two new capacitors onto the power supply board. They did it for $40, which included cost for the 2 new capacitors, while I waited and it only took about 10 minutes.
6. I replaced the power supply board and back panel of TV and it worked!!!

Some people on this sight suggested replacing the capacitors with some that have higher temperature ratings. Based on that advice, I wanted to replace my two that were bad (3300uf 10v) with two rated at 4700uf 35v, but my electronics guy suggested against it. Instead, I replaced mine with 3300uf 50v, with the only difference from the original parts being the higher voltage (50v instead of 10v). I figure if the problem occurs again, I now know I can get it fixed for less than $50.00. Philips - Magnavox should be ashamed for such poor customer service and not telling people about this simple fix. When I called their customer service support number I was simply directed to a repair place --over two hours away!!! 

Jan 22, 2009 | Philips 50PFP5332D 50 in. Plasma...

4 Answers

I have a Gateway LP2207 Monitor that will not turn on. It shows a picture for about a second and goes off. Any assistance would be greatly appreciated.


3 electrolic capcitors on power supply board go bad, disasemble carefully split case,start from bottom take care with ribbon cable to face, flip up ribbon brown holder on face slide out cable, remove sheild for supply take screws off of supply board,turn over and 2 caps next to each other are 680uf by 25v replace with 680uf by 50v , close by is a 1000uf by 25v replace with 1000uf by 35v or 50v. reassemble but be carefull not to pinch ribbon cable to face buttons after sliding back in socket and flip catch down on cable,remember!!! don't pinch cable when snaping case together.
From Keith the ham radio operator former TV and radio repairman.
ufothing@yahoo.com

Dec 07, 2008 | Computers & Internet

6 Answers

ILO LCT32HA36 will not power on


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 top.

Aug 24, 2008 | iLO LCT32HA36 Television

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