How-To: Common Cause Of Flat Panel PS Failure
Bob Villa
electrolytic capacitors (same physical size) on the switching PS.
There are 2) 1000uF X 10V and 2) 470uF X 15V that usually bulge and/or
fail. You shouldn't pay more than .25to .50c for each. (I used higher
voltage on the replacements of 1000x15 and 470x25)
Symptoms of failure are: slow power-up or totally dead.
stra...@yahoo.com
Look for highest ripple current rating. Nichicon HZ, HN, Panasonic FM
G²
Plai...@yawhoo.com
Correct. 'Bob Villa' apparently wants repeat business as his high ESR
caps will fail quickly. Note, 'Bob', good quality low ESR caps aren't
real expensive - you just aren't going to buy them at Radio Shack or
Caps R Us.
PlainBill
Bob Villa
Michael A. Terrell
Going to a higher voltage usually raises the initial ESR. That kind
of defeats the purpose of repairing the equipment.
--
You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
Teflon coated.
Michael A. Terrell
Which series? The brand tells you nothing about their
specifications.
Grant
>
>stra...@yahoo.com wrote:
>>
>> On Mar 6, 7:35 am, Bob Villa <pheeh.z...@gmail.com> wrote:
>> > This is common to almost all flat panel power supplies. There are 4
>> > electrolytic capacitors (same physical size) on the switching PS.
>> > There are 2) 1000uF X 10V and 2) 470uF X 15V that usually bulge and/or
>> > fail. You shouldn't pay more than .25to .50c for each. (I used higher
>> > voltage on the replacements of 1000x15 and 470x25)
>> > Symptoms of failure are: slow power-up or totally dead.
>>
>> Look for highest ripple current rating. Nichicon HZ, HN, Panasonic FM
>
>
> Going to a higher voltage usually raises the initial ESR. That kind
>of defeats the purpose of repairing the equipment.
Opposite, higher voltage rating usually lowers ESR ;) Check the datasheets.
Grant.
Kripton
you can build yourself a very usefull esr meter to identify quickly the
faulty capacitor ...
schematics here, simple analog to sophisticated digilat esr meter.
http://kripton2035.free.fr/esr-repository.html
regards,
--
---
Kripton
Bob Villa
wrote:
I'll let you know when they fail...dip-shit! (Original crap lasted 5
yrs)
Meat Plow
FAIL. You're out of your element here. Go back and troll alt.home.repair.
Your bullshit might be better told there where you don't have real repair
techs who did/do this kind of stuff for a living.
--
Live Fast, Die Young and Leave a Pretty Corpse
Bob Villa
I'm only relating what I did/or found to fix a problem I had...if you
shitheads want to add to that...your purgative.
Sorry if it has been covered here before.
Michael A. Terrell
Dipshit? You don't even know how to snip a sig file, let alone
anything about real troubleshooting. I've been finding and replacing
bad electrolytics for over 45 years.
Michael A. Terrell
It depends on the construction ot the Electrolytic. Some larger size
cans have four identical capacitors in parallel, inside the can to lower
the ESR. A lot don't.
Bob Villa
wrote:
>
> > I'll let you know when they fail...dip-shit! (Original crap lasted 5
> > yrs)
>
> Dipshit? You don't even know how to snip a sig file, let alone
> anything about real troubleshooting. I've been finding and replacing
> bad electrolytics for over 45 years.
>
> --
> You can't fix stupid. You can't even put a Band-Aid on it, because it's
> Teflon coated.
Do YOU even know how to read? I put this out there...if you want to
add to it from your experience go to it. There are people who are just
trying to save some money and fix things themselves. Lighten up...I
don't need to belong to your fucking club!
Arfa Daily
"Michael A. Terrell" <mike.t...@earthlink.net> wrote in message
news:wdCdnX91Y788-OnQ...@earthlink.com...
>
> stra...@yahoo.com wrote:
>>
>> On Mar 6, 7:35 am, Bob Villa <pheeh.z...@gmail.com> wrote:
>> > This is common to almost all flat panel power supplies. There are 4
>> > electrolytic capacitors (same physical size) on the switching PS.
>> > There are 2) 1000uF X 10V and 2) 470uF X 15V that usually bulge and/or
>> > fail. You shouldn't pay more than .25to .50c for each. (I used higher
>> > voltage on the replacements of 1000x15 and 470x25)
>> > Symptoms of failure are: slow power-up or totally dead.
>>
>> Look for highest ripple current rating. Nichicon HZ, HN, Panasonic FM
>
>
> Going to a higher voltage usually raises the initial ESR. That kind
> of defeats the purpose of repairing the equipment.
I'm not entirely sure that I go along with that, Michael. The chart of
'expected' ESRs on the front of Bob Parker's meter, would suggest that
increasing the working voltage for a given capacitance value, produces ever
lower ESR figures, until you get up to about 100v working, when the trend
reverses slightly, and small increases are then recorded ... I've always
found that chart of his a pretty good guide.
Arfa
Michael A. Terrell
I've seen some brands that didn't follow that chart very well. The
cheaper brands seem more like they set the spec with a dartboard. I had
datasheets for over fifty brands t one time, and some so called low ESR
were no better than the lowest grade of standard electrolytics. Other
do follow Bob Parker's chart quite well.
Michael A. Terrell
Posting half assed information helps no one, and bad electrolytics in
power supplies have been a problem since the '20s. Also, no one needs
your childish rants. There are enough crybabies who pop into the group
and think they are a genius, without you.
John Robertson
Even Bob P. isn't very happy with the chart - it is only a guideline,
not a code sheet...
http://www.youtube.com/watch?v=b6kgS_AwuH0
John :-#)#
--
(Please post followups or tech enquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Bob Villa
wrote:
> Bob Villa wrote:
>
> > Do YOU even know how to read? I put this out there...if you want to
> > add to it from your experience go to it. There are people who are just
> > trying to save some money and fix things themselves. Lighten up...I
> > don't need to belong to your fucking club!
>
> Posting half assed information helps no one, and bad electrolytics in
> power supplies have been a problem since the '20s. Also, no one needs
> your childish rants. There are enough crybabies who pop into the group
> and think they are a genius, without you.
>
> --
> You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
> Teflon coated.
Hey Mike when can I expect this PSU to fail...a few years from now?
Thanks for your gracious responses.
Michael A. Terrell
Bob Villa wrote:
>
> On Mar 7, 9:13 pm, "Michael A. Terrell" <mike.terr...@earthlink.net>
> wrote:
> > Bob Villa wrote:
> >
>
> > > Do YOU even know how to read? I put this out there...if you want to
> > > add to it from your experience go to it. There are people who are just
> > > trying to save some money and fix things themselves. Lighten up...I
> > > don't need to belong to your fucking club!
> >
> > Posting half assed information helps no one, and bad electrolytics in
> > power supplies have been a problem since the '20s. Also, no one needs
> > your childish rants. There are enough crybabies who pop into the group
> > and think they are a genius, without you.
>
> Thanks for your gracious responses.
When can you post a real question?
Bob Villa
wrote:
>
>
> > Hey Mike when can I expect this PSU to fail...a few years from now?
> > Thanks for your gracious responses.
>
> When can you post a real question?
>
> --
> You can't fix stupid. You can't even put a Band-Aid™ on it, because it's
> Teflon coated.
Alas, the mastertech doesn't understand sarcasm.
Michael A. Terrell
Bob Villa wrote:
>
> On Mar 31, 6:20 pm, "Michael A. Terrell" <mike.terr...@earthlink.net>
> wrote:
>
> >
>
> >
> > > Hey Mike when can I expect this PSU to fail...a few years from now?
> > > Thanks for your gracious responses.
> >
> > When can you post a real question?
>
You can't even do sarcasm well, and I'm not being sarcastic.
Bob Villa
The only thing you do well...other than being a critic...is please
yourself.
Michael A. Terrell
Yawn. I built KU band communications equiment that is aboard the
ISS, and all you do is whine.
Bob Villa
Holy Crap! I must have cut you deep...now you need to brag. I am so
impressed...especially how you belittle people instead of helping
them.
Michael A. Terrell
Sigh. You don't want help. You were bragging about your 'fix'. I
have helped thousands of people over the last 45 years, but only those
that wanted help.
Bob Villa
I researched the cause of common failures and related what I
found...all you needed to do was suggest using better/more appropriate
capacitors. Instead you and "Meatball" chose to belittle my effort.
My only thought in posting was that someone else might fix their flat
panel and save it from the trash.
Good Day Sir!
Meat Plow
Villa is a troll. He trolls alt.home.repair with the same bullshit.
Probably a few others too.
--
Live Fast Die Young, Leave A Pretty Corpse
Bob Villa
Thanks for your illuminating supposition.
Michael A. Terrell
He's not even a decent troll.
Meat Plow
I only used "troll" because it was the closest thing to what he does I
could think of. I think the whole story was made up.
Michael A. Terrell
No, he is just a low grade troll. He tried to email me more of his
childish insults, but they bounced because he isn't white listed.
If he really did replace the caps, he would have used lead free
plumbing solder with 'Ruby flux', and WD40 to wet the mess.
Meat Plow
LOL Luzer.
> If he really did replace the caps, he would have used lead free
> plumbing solder with 'Ruby flux', and WD40 to wet the mess.
<nods>
Bob Villa
> Teflon coated.
Who is childish here? And you know there were insults...but you didn't
see them?
And your sig is much improved!