Electronics > Repair

bad caps on samsung lcd display

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What_NZ:

--- Quote from: retiredcaps on July 03, 2014, 10:22:11 pm ---In addition, using the wrong series of caps will also cause them to fail prematurely.

In a SMPS, you will likely need low ESR caps.  Caps like Panasonic FM or FR series.

PS. Replacing only the obviously bulged capacitors and thinking it is "repaired" is another newbie mistake.

--- End quote ---

The Capacitor Bible - http://industrial.panasonic.com/jp/i/29880/2T_E/2T_E.pdf
or the cut down version http://industrial.panasonic.com/www-data/pdf/ABA0000/ABA0000PE285.pdf

lpc32:
How closely do you need to match the specs of the original caps? Are power supply caps practically the only thing that breaks?

wraper:

--- Quote from: lpc32 on July 04, 2014, 09:14:11 pm ---How closely do you need to match the specs of the original caps? Are power supply caps practically the only thing that breaks?

--- End quote ---
Generally just watch that ESR is around that of original or lower and max ripple current is the same or higher. If the replacement is from top manufacturer, it wouldn't be too bad even if parameters are a bit worse, just because they don't embellish them as crap brands.
They are not only things what breaks but a very common fault. Especially if psu is made around 2003-2008.

retiredcaps:

--- Quote from: lpc32 on July 04, 2014, 09:14:11 pm ---Are power supply caps practically the only thing that breaks?

--- End quote ---
Having spent significant time on badcaps.net helping others fix their broken lcd monitors, the answer is no.

Other things that go bad are the bridge rectifier (usually after some power outage/storm), fuse, voltage regulators on the main/logic board, corrupt eeproms, bad ccfls, poor solder joints and shorted transistors.

fluxcapacitor:
there are some sellers on ebay that i trust,ive never had any fakes from them .

http://stores.ebay.co.uk/PC-MotherBoard-Capacitors-Store

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