I have a few browser automation tasks set up to run using cron on my home NAS (Ubuntu / Linux Mint 17), but ran into trouble with Selenium’s webdriver throwing exceptions due to my NAS being headless. There is a very simple workaround for this problem – create a bash/shell script that you will call from cron, give it the… Read more →
Thought I would share some Python code that I use when I want an alert via text message. I originally used this in conjunction with a script to parse a web-page every minute and let me know when a particular Bitcoin miner was available. Yes, they sold out that fast! This is also terrific for IT-type alerts. On my Ubuntu… Read more →
So I’ve been teaching myself Java. My textbook of preference is Introduction to Programming Java – An Interdisciplinary Approach by Robert Sedgewick and Kevin Wayne. Because I currently work in Python, I decided to port the programs as I go and uploading them to Google Code. A bit of a grind, but I believe, worthwhile. Dec 02, 2014: Chapter 1… Read more →
Conky is system monitor software for X (aka, Linux desktop). I find that most of the themes out there really don’t suit my taste, and wanted to modify an existing theme (Gotham) to add CPU, memory, and network utilization. I ended up with a theme that’s elegant and does everything I wanted (albeit Android-ish). If you haven’t installed Conky, it’s… Read more →
I recently decided to give up Microsoft and Windows. After browsing a multitude of Linux distros, I settled on Linux Mint 17. I like the style of Cinnamon and it works well for me as a Software Developer. One issue I had recently was that the panel icons (similar to Quick Launch in Windows) have almost no gap between them… Read more →
I recently purchased a Toyota Venza V6 and picked up a generic OEM Industrial “Type F” oil filter wrench from the local AutoZone. That traditional metal “cap” was a one and done piece of Made in China garbage. I decided to look look around for something that actually does the job – even better if it was made in the… Read more →
I actually like repairing electronics and have been doing so with my hobby of restoring classic arcade video games for over 20 years. It is always amusing to me to see that the same problems that plagued an Atari Asteroids machine from 1979 are the same you’ll find in modern power supplies – crappy soldering and/or cheap capacitors.
Interlude over, moving on to the power board in a Samsung TV (LN-832410) – the BN96-03775A. Problem? Cheap caps that swelled up and then “gave up the ghost.”
This particular TV would not power up immediately, but if you left it on for a while, eventually it would fire up and work perfectly.
Ok, so you take something apart – how do you spot a bad or failing capacitor? Usually if the electronic device has failed completely, you will see that the capacitor has become “swollen” on top. This applies for capacitors in anything from TVs to the massive cap that helps kick-start the fans on your outdoor air conditioning units.
In this Samsung there were 3 caps that showed obvious signs of failure. It may be difficult to see, but if you run your fingers over the top of the caps, it will be really easy to notice which ones feel swollen. Here’s a pic of two of them.
For some electronic devices you can find “cap kits” that let you shot-gun all of the caps on a board. This is a great approach because most of the time the kits are super-cheap ($5 – $15) and why would replace a single 10-year old cap and leave all the other old ones in?
In this case, I replaced (7) capacitors. I labeled them in the photo and their values are listed below the image. Did I mention photography is another of my hobbies?
- 1/2 (CM851 & CM852) = 1500uf 35v
- 3 (CS852) = 1000uf 16v
- 4 (CM856) = 1000uf 25v
- 5 (CM858) = 470uf 25v
- 6 (CM861) = 2200uf 10v
- 7 (CM860) = 1000uf 35v
Total repair minus shipping costs & my time? $7.10.
For most electronic repairs I like to use caps that are rated for around 10,000 hours, 105C+ temp rating, and low ESR. All of the ones I chose for this repair were Panasonic.
I absolutely recommend Mouser for replacement capacitors and electronic parts in general. They have an absolutely massive selection and are in Texas, so I almost always get my parts “next day” regardless of who I ship with. They ship same or next day so regardless of where you live, you’ll get your parts fast.
UPDATE: I’ve driven about 80 miles since I installed the brackets, and as much as I want to love them, I really don’t. The car is actually much *less* comfortable with the seat farther back, so I’ll be returning the brackets. I bought them through Amazon, so at least I won’t have any hassles on the return. Read more →
Awhile back we put new tires on our 2008 Toyota Prius. When we did this, we had the alignment done as well. Ever since it came out of the tire shop, it seemed like at random the traction control light would come on and the car would make a very loud “beep beep beep” until you got below 30mph. I… Read more →
After buying my wife a bigger car now that we have two boys, I inherited a 2008 Toyota Prius. I’ve been driving a regular-cab Chevy Silverado 5.3L V8 since I can remember, so migrating from 16mpg highway to around 40 is nice. The Prius however, is one uncomfortable car to drive. I’m 6′ tall and am cramped in the driver’s… Read more →