Re: Cheap solder joints- rant

Tony Hwang wrote:

mm wrote:

On Fri, 18 Nov 2005 12:03:02 -0600, J Kelly <jkelly@*newsguy.com>
wrote:


My dad's furnace quit a few years ago on Christmas Eve. Furnace guy 



Did you check the flue for Santa  Claus?

Some times he goes down the wrong chimney and gets stuck.


came out, said the controller boards was dead.  He replaced it, then
waited around a bit just to be sure it was going to continue to work
ok since the old one was intermittent and he didn't want to be called
back the following morning.  I looked at the old board and found a
cold solder joint, luckily I just so happened to have my pinball




I had a summer job at the US Naval Avionics Facility in Indianapolis
in 1966.    Part of my job was to deliver the internal mail.   In one
part of the buildingt, they had troughs of molten solder, though which
they tried to pass circuit boards, the bottoms about even with the
surface so that all the joints would solder at once, without people
doing it.  One problem was getting a very flat pool of solder.

I don't know what the other problems were, but they had been working
on it before I got there, they did so all summer, and they were still
at it when I left.

I don't know if anyone ever solved this problem.

I think I'm allowed to talk about this now.


machine reapir kit with me which had a soldering iron.  Resoldered the
connection on the board and had him put it back in.  Worked great. The
repairman was amazed, and dad was happy that he saved a couple hundred
on the part.  Cold solder joints are a real problem with electronics
and it seems to have gotten worse in the past couple years with all
the korean and chinese made junk.





Remove NOPSAM to email me.  Please let
me know if you have posted also.

Hi,
Todays service people are mostly lack good electronics knowledge.
My Carrier furnace had same kinda problem. After Googling and investigation, it was apparent due to the heat from two hi Wattage resistors on control board, couple solder joints were compromised. After resoldering and drilling few holes on the plastic cover around the resistors for better cooling, every thing is working OK again.
Locally replacement board was 320.00CAD plus tax which I did not need.
Tony
Hi,
Koreans and Chinese make things whatever spec. calls for. They're not making junk. Given specification is junk. By whom? You guess.
Tony
.

Relevant Pages

  • Re: Need value of R335 on Sylvania Chasis 26B1-06AA
    ... are 4 more resistors just like it. ... solder joints on them were cracked or cracking. ... > The Chasis model # is 26B1-06AA ... Prev by Date: ...
    (sci.electronics.repair)
  • Re: 7 opto transmitter boards are done! - Update
    ... As Martin said the resistors were the big problem on the OEM boards. ... The surface mount resistors on Tony's boards are basically ... and off does physical damage to the resistors and the solder joints ...
    (rec.games.pinball)