<<  <  Page 3/3
User Rank
Re: Bad solder
tekochip   10/23/2012 11:03:08 AM
I agree, I've seen it over and over. Themes solder formulations make such ugly looking joints that it's nearly impossible to tell from a visual examination if the joint is good or not. The EU really has to examine this issue again. I think they made a bad call.

Larry M
User Rank
Bad solder
Larry M   10/23/2012 10:38:37 AM
You wrote ". The problem was immediately apparent: several cold solder joints on one of the relays. I re-soldered every joint on the board because there was so little solder used in manufacturing that future failures were inevitable. Sure enough, the problem was solved.

"We then pulled the module on his Accord and found exactly the same problem -- exactly the same pins, even! The same remedy with the same result, the problem was resolved."

Not at all surprising. The misguided European rulings changing the composition of solder has resulted in formulations that are brittle and become more brittle with age. Electrical appliances, cellphones, cameras, music players, and cars are all failing prematurely due to this terribly ill-considered decision. I received a set-top box sent from 200 miles away, and received it with a surface mount IC (BGA) rattling around in the bottom.

I am sure you made the repairs with 60/40 or 63/37 Pb/Sn solder which should have been used in the first place.

This is not to mention the "tin-whisker" problem, also caused by the new solder formulations and suspected of causing the runaway Toyota accelerations.


Larry M
User Rank
Not good to replace a thermal breaker with a fuse
Larry M   10/23/2012 10:30:44 AM
Cars have used self-resetting thermal breakers instead of fuses on the headlights as early as the 1940s. There's a reason for this. On a pitch black country road on a cloudy moonless night, you don't want to be pitched into sudden darkness--and with no way to get home, just because wire insulation chafed through someplace.

You might be able to find and replace that fuse in blackness, but could your wife?

Better that you or she should drive home with blinking lights, cycling at a rate low enough to prevent fire or further wire damage but high enough for safety--to see and be seen.

<<  <  Page 3/3

Partner Zone
Latest Analysis
Caterpillar Inc. demonstrated this week at Design and Manufacturing Philadelphia that heavy industry can reap big benefits from 3D printing.
The most efficient and ecologically sound automation system may be "eco obsolete" — an older system sustained with obsolete parts.
Flexible electronics will expand beyond its high-profile role in fitness over the next five years, potentially aiding in the treatment of movement disorders such as Parkinson’s Disease.
Design News contributing writer Fred Eady strolls down the memory lane of the homebrew embedded WiFi designs he then wrote reference books around.
With two new tools from LUXeXceL, you can now create and print custom lens designs optimized for your particular application.
Design News Webinar Series
10/1/2015 11:00 a.m. California / 2:00 p.m. New York
9/10/2015 11:00 a.m. California / 2:00 p.m. New York
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
10/20/2015 8:00 a.m. California / 11:00 a.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Oct 5 - 9, Standards for the Internet of Things (IoT)
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7

Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service