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saber850 saber850 is offline
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Default LCD Desktop Monitor Fading to White, then Black

On May 10, 5:42*pm, Jeff Liebermann wrote:
On Mon, 10 May 2010 13:32:47 -0700 (PDT), saber850

wrote:
PCB Designation * * Farads (µF) * *Voltage (V) * * Temp (C) * * * *Length (mm)
Potential Length (mm) * * * Diameter (mm) * Lead Spacing (Board) (mm) * * * Mouser
Replacement Mouser *Replacement URL
C105 * * * *150 * * 450 * * 105 * * 41 * * *45 * * *20 * * *7 * * * 661-EKMQ451VN151MP40
http://www.mouser.com/Search/Product...51VN151MP40Svi....


You probably do NOT need to replace the big 150uF/450V capacitor. It's
not the high voltage low ripple current capacitors that fail. It's the
low voltage, but high ripple current filter caps that get hot and blow
up.

C107 * * * *47 * * *50 * * *105 * * 11 * * *24 * * *5 * * * 5 * * * 667-ECA-1HHG470
http://www.mouser.com/Search/Product...HHG470virtualk....


Tolerable. *It's not a low ESR type, but it's low enough to work.

C301 * * * *680 * * 25 * * *105 * * 17 * * *22 * * *10 * * *5 * * * 667-EEU-FC1E681
http://www.mouser.com/Search/Product...C1E681virtualk....
C302 * * * *680 * * 25 * * *105 * * 17 * * *22 * * *10 * * *5 * * * 667-EEU-FC1E681
http://www.mouser.com/Search/Product...C1E681virtualk....


It's low-ESR (although the data sheet doesn't clearly show this) so it
will work.

C110 * * * *820 * * 25 * * *105 * * 22 * * *24 * * *10 * * *5 * * * 598-361R821M025EG0E
http://www.mouser.com/Search/Product...21M025EG0Evirt....
C111 * * * *820 * * 25 * * *105 * * 22 * * *24 * * *10 * * *5 * * * 598-361R821M025EG0E
http://www.mouser.com/Search/Product...21M025EG0Evirt....


Also low-ESR and good quality cap. *No problems.

C112 * * * *330 * * 25 * * *105 * * 14 * * *24 * * *10 * * *5 * * * 667-EEU-FC1E331
http://www.mouser.com/Search/Product...C1E331virtualk....


Looks generally ok.

I'll leave it to you to determine if the case sizes and lead spacing
are the same as the originals. *Neither is particularly critical as
there is usually plenty of room. *One suggestion is to use the next
higher voltage rating capacitor. *The 50v cap will probably remain
50v, but the 25v caps should be replaced with 35v caps. *They last
longer, have a lower ESR, and aren't that much larger.

--
Jeff Liebermann * *
150 Felker St #D * *http://www.LearnByDestroying.com
Santa Cruz CA 95060http://802.11junk.com
Skype: JeffLiebermann * * AE6KS * *831-336-2558


Thanks for reviewing & the feedback. I'm glad I don't need to change
the large cap.

I'm looking for a cap w/ a lower ESR for the C107 cap (47uF, 50V). I
don't see 'ESR' in the data sheet. What do I look for? Would this
one be better:
http://www.mouser.com/ProductDetail/...Hyu04R92 c%3d
?

Most of these caps were near, if not at, the physical size limit. All
of the 25V caps have = 2mm of space to a neighboring component, and
in 2 cases, it's another cap (so only one could be bigger). So there
isn't much room for these (one will actually be a very tight fit as
is).