|
|
|
|
|
|
|
|
|
|
|
There is something good about esr meter because besides electrolytic capacitor it can be use to measure other type of capacitors such as the non polarity capacitor. From esr meter specification, it is usually mentioned only checking the electrolytic type. When i began to experiment with the Dick Smith ESR Meter i found that it have the capabilities to check other type of capacitors as well.
However it is limited to checking capacitor in the higher value only such as .1uf(104), .22uf(224), 1uf(105) and etc. Lower capacitance value don't get any reading from the esr meter due to it can only read until 99 ohms. Perhaps other esr meter such as the B & K esr meter have the range to check it.
You will even be surprised to see that the dick smith esr meter can check the non-polarity capacitor in-circuit (without removing the cap).
True case example-Monitor came in with display jumping horizontally. You can see a bunch of horizontal black lines across the top display (picture). From experienced it will tell you that vertical section have problem. I begin to troubleshoot the vertical section. Supply voltage checked ok, vertical driver and oscillator IC replaced, all components connected or nearby vertical driver and oscillator ic have been checked ok. By the way I used digital capacitance meter to check the non-polarity cap and esr meter to check the electrolytic cap. The problem is still there and can't be solve!
When i use Dick Smith ESR Meter to compare the esr value of a non-polarity capacitor located near the vertical driver ic, i noticed that there is a big different in the esr value. The good esr value for a .22uf non-polarity cap is between 6.5 to 7 ohm but the spoilt one have a value of 14 ohm! Almost double the value, that's why the display jump. The good thing is i discovered the culprit while the capacitor still in the circuit which mean this esr meter can check non-polarity cap in-circuit. However my recommendation for you is to solder out one leg and check unless you already have the experienced in checking components on board. Replacing the cap solved the display problem.
Conclusion-In order to accurately test a non-polarity capacitor, besides checking the capacitance value and using analog meter to check the charge and discharge to see if it has develop any short circuit when under load, you are also required to check the esr value as well.
Jestine Yong is a electronic repairer and a writer. For more information about electronic repair please visit his website at http://www.noahtec.com/electronic-repai r-articles.htm
So many people have small USB drives today, but what... Read More
EEPROM stands for Electrical Erasable Programmable Read Only Memory and... Read More
Bluetooth BasicsBluetooth technology is nothing new, but in many respects... Read More
A Good Notebook BagForget those that are bundled with your... Read More
Here's how to format a hard drive (Legal Stuff: We... Read More
My mother always told me to dust, but I never... Read More
CD ROMS - If you're adding or removing an internal... Read More
The ability to easily move data from PC to PC... Read More
There are many different names for these drives, just so... Read More
The importance of a bar code reader in this day... Read More
A surge protector [AKA surge suppressor] is an electrical plug-in... Read More
Science-Fiction meets reality with this new video display technology.The Heliodisplay... Read More
Bar code readers have proven themselves to be essential tools... Read More
Most HP and Epson printers are drop on demand printers.... Read More
You've laid out good money for your laptop computer, but... Read More
There are three refurbished laptop battery types, each named for... Read More
Who needs an LCD display? Well, if you're like me,... Read More
Samsung laser toner is just as popular as its Hewlett-Packard... Read More
The gaming laptop is coming of age! It is steadily... Read More
Picking your way through the ton of information available on... Read More
The Power Supply convert's your regular household current into low... Read More
Digital cameras have really taken off in popularity in recent... Read More
The Inkjet printer industry is booming. Office supply companies report... Read More
Are you captivated by the stunning Case Mods you've seen... Read More
The quick answer is...yes and no.Consider this. How many printer... Read More
Someone recently asked me "I teach senior citizens in a... Read More
Surge Suppressors ? A First Line of DefenseAll home theater... Read More
To upgrade or not? That is the question. At least,... Read More
Forget about emptying your wallets every time you see the... Read More
Roll over lumbering desktop computers, the limber laptop is here,... Read More
What is so important about cables anyway?One of the most... Read More
Computer MiceEvery computer user can hopefully identify their mouse and... Read More
From throwing our unnecessary files, to defragmenting, from partitions to... Read More
It is a given fact that buying wholesale would make... Read More
Switch mode power supply contain some large filter capacitors that... Read More
If, for some reason, you can't get an exact replacement... Read More
We all know what it is like when that message... Read More
Video technology has increased significantly over the past years, and... Read More
A Good Notebook BagForget those that are bundled with your... Read More
Tools needed:1 - 10cc Injector1 - 4" - 5" of... Read More
A recent Tech Tip covered the basics of selecting a... Read More
When you're studying for your CCNA exams, you're going to... Read More
My mother always told me to dust, but I never... Read More
The number of different formats available in DVD drives can... Read More
Testing diodes is different from testing a resistor because you... Read More
Ever wonder where all the cool gadgets come from? Ever... Read More
Most HP and Epson printers are drop on demand printers.... Read More
We live in an area that has begun to... Read More
When it comes to sales of technology products over the... Read More
Laptops or Notebook computers are an expensive personal and business... Read More
Computer Hardware |