sci.electronics.repair Google Group

Re: Yet another bulging-capacitors replacement

arfa.da...@ntlworld.com (Arfa Daily) — Sun, 05 Sep 2010 00:17:10 UT

Assuming that you're talking a 'standard' SM rework station with hot air
pencil, and not a multi-thousand dollar fixed rework station, then the one I
recently purchased direct from China, was just 55 quid - about $85. Bit of
postage to add on of course, but at that sort of money, not too much
justification required, I would suggest ? Look on eBay for KADA 852D. Very

How best to eval heat risk from AC adaptors

vjp2...@at.biostrategist.dot.dot.com — Sat, 04 Sep 2010 21:12:03 UT

WHat P=VI values are safe to leave plugged in indefinitely (clock or phone)?
I still remember a 1970s Readers Digest on a fire from a 1950s
telephone adaptor..
- = -
Vasos Panagiotopoulos, Columbia'81+, Reagan, Mozart, Pindus, BioStrategist
[link] [link]

Re: Supergluing your fingers together

pcdhspammesensel...@electrooptical.net (Phil Hobbs) — Sat, 04 Sep 2010 20:57:50 UT

isw wrote:
You put a drop of it on a bit of scrap plastic, and apply with a
toothpick--just like epoxy. If you use too much, the free surface
outgasses like mad and you wind up with white plastic snow all over
everything. There are 'low outgassing' PMMA formulations, but they're
only low by comparison.

Re: Yet another bulging-capacitors replacement

je...@cruzio.com (Jeff Liebermann) — Sat, 04 Sep 2010 20:22:17 UT

On Sat, 4 Sep 2010 12:28:55 -0700 (PDT), whit3rd <whit...@gmail.com>
wrote:
<[link]>
The exact quote is:
A considerable increase in thermal effectiveness of a BGA
package can be obtained by using boards that are thermally
efficient, increasing the airflow, or providing thermal paths

Re: Yet another bulging-capacitors replacement

whit...@gmail.com (whit3rd) — Sat, 04 Sep 2010 19:28:55 UT

Like Intel says, it's primary.
'Primary' does not mean the heatsink with the largest heat flux. It
means the FIRST heatsink, the one that all designers start with.
BGA packages have quite a lot of thermal conductivity through those
soldered-down feet, it's not something to be ignored.
In related news, 'prime rib' is a rib roast with the rib #1 included.

Re: Yet another bulging-capacitors replacement

je...@cruzio.com (Jeff Liebermann) — Sat, 04 Sep 2010 17:19:27 UT

On Sat, 4 Sep 2010 09:44:11 +0100, "Arfa Daily"
There are about 100 assorted BGA packages, most of which do not
require a heat sink. You see them on video cards, cell phones, glue
chips, game machines, and most commonly on memory cards. There is NO
WAY your large BGA package, which probably has a big FPGA burning 200

HOT ACTRESS

sravanthi.sravy...@gmail.com (SRAVANTHI LOVE) — Sat, 04 Sep 2010 15:33:12 UT

ASTHASINGAL IN A BATHROOM
[link]
SNEHA HOT SEX PHOTOS
[link]
ARTHICHABRIA BEAUTIFUL PHOTOS
[link]
ANUSHKA UNBELIVABLE PHOTOS

Re: Plasma TV Foggy area

mhyw...@yahoo.com (Meat Plow) — Sat, 04 Sep 2010 12:57:54 UT

If the screen protector was damaged by some solvent it would be easy to
tell using a little oblique lighting

Re: Plasma TV Foggy area

mark_zachar...@sbcglobal.net (Mark Zacharias) — Sat, 04 Sep 2010 09:51:01 UT

Lets not get ahead of ourselves - do we know for sure it's really a plasma
and not an LCD? My customers often confuse the two.
If not damage to anti-glare coating which has been suggested, it does sound
more like an LCD type problem to me.
Mark Z.

Re: Yet another bulging-capacitors replacement

arfa.da...@ntlworld.com (Arfa Daily) — Sat, 04 Sep 2010 08:44:11 UT

OK. So here's the thing. The articles that you linked to are very
interesting, and at least one says that "the pcb is the primary heatsink in
the case of BGAs". Given that is true, as it was Intel I think that said it,
is this true for all BGAs ? If it is, then what is the point of fixing an
elaborate heatsinking system to the *tops* of the BGAs, and force cooling

Re: Weird stuff -- update -- (was Electronic Kenmore refrigerator not working, what does this sign mean)

lionsl...@consolidated.net (Martin H. Eastburn) — Sat, 04 Sep 2010 04:10:59 UT

Vapor lock. Likely a little light on freon and the pump shutting off
gets a high head pressure and can't push up to clear it.
Likely in the off position, it will leak pass a gasket and it will start.
That is my suspect. Might be that way only when hot. e.g. just running.
Might work in the shop all winter if cold out there - lightly running and

Re: Supergluing your fingers together

i...@witzend.com (isw) — Sat, 04 Sep 2010 03:50:36 UT

In article <e9a18692kkr82i2c0vu3dd6oij583 5k...@4ax.com>,
Some newer formulations can be brushed on; they don't go off as fast,
and it's a lot easier to get the joint properly aligned than it used to
be.
Also, some formulations will work fine with things like paper or
cardboard, too.
Isaac

Re: Supergluing your fingers together

i...@witzend.com (isw) — Sat, 04 Sep 2010 03:47:27 UT

In article <i5q87b$5i...@news.eternal-sep tember.org>,
Easy; you just smear it on with your finger 8^}
Isaac

Re: Weird stuff -- update -- (was Electronic Kenmore refrigerator not working, what does this sign mean)

the-daring-du...@peckerhead.net (The Daring Dufas) — Sat, 04 Sep 2010 03:32:47 UT

Back in the late 70's I worked for Tandy repair and most of the trouble
with their equipment was caused by cold solder joints. The connections
made with plated through holes on the circuit board were always suspect.
TDD

Re: Weird stuff -- update -- (was Electronic Kenmore refrigeratornotworking, what does this sign mean)

mike.terr...@earthlink.net (Michael A. Terrell) — Sat, 04 Sep 2010 03:07:51 UT

Some cases put pressure on one side of the ribbon connector. The
modification extended it outside of the case. I repaired a lot of early
computers, too.