HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
<<  <  Page 3/3
tekochip
User Rank
Platinum
Re: Bad solder
tekochip   10/23/2012 11:03:08 AM
NO RATINGS
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
Platinum
Bad solder
Larry M   10/23/2012 10:38:37 AM
NO RATINGS
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
Platinum
Not good to replace a thermal breaker with a fuse
Larry M   10/23/2012 10:30:44 AM
NO RATINGS
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
Texas Instruments has produced an e-book intended to get you up to snuff on the Industrial Internet of Things.
A South African startup is combining recycled plastic with solar power to give underprivileged school children a stylish schoolbag that also supplies them with light to study by.
An in-depth survey of 700 current and future users of 3D printing holds few surprises, but results emphasize some major trends already in progress. Two standouts are the big growth in end-use parts and metal additive manufacturing (AM) most respondents expect.
Technology and global expansion are playing key roles in making manufacturing an attractive field for women to join, more than ever before, said the president of a woman-owned family of companies.
A few years ago, reshoring roared onto the scene as the next great movement in manufacturing, but the data so far reflect otherwise.
More:Blogs|News
Design News Webinar Series
8/13/2015 11:00 a.m. California / 2:00 p.m. New York
6/25/2015 11:00 a.m. California / 2:00 p.m. New York
6/24/2015 11:00 a.m. California / 2:00 p.m. New York
6/11/2015 11:00 a.m. California / 2:00 p.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.
Aug 31 - Sep4, Embedded System Design Techniques™ - Writing Portable and Robust Firmware in C
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