Printers - Choosing the Printer That Fits Your Needs
Printers - Choosing the Printer That Fits Your Needs
copiers have become a daily central for somebody who has a laptop
The Importance Of Electronic Components Surrounding ICs
The Importance Of Electronic Components Surrounding IC’s
Troubleshooting and repairing electronic equipment can really make us have a great satisfaction whenever a problem is solved. You don’t mind how many hours have been spent especially if you are a beginner and your only focus is to find out the fault and make the equipment work again. What you want is experience and the fun of learning new things as you progress to search deeper about electronic repair. But some of us as electronic troubleshooter gave up easily if come across problems that are difficult to solve, perhaps you do not understand how the circuit work and i myself was in this situation before. Don’t worry if you don’t understand how a particular circuit work as you read on I will provide some solution for you.
Usually a repair technician or engineer has a procedure or their own style of repairing equipment. I can say most of us as electronic repairer perform a test first to see what the fault is before begun to open up the equipment and repair. For example, a Monitor with one bright white horizontal line across the screen reveals to us that the fault is in the vertical section or circuit. Once the cover opens, we will head straight to the vertical section and look for dry joints, perform voltage testing, check for related components, test vertical yoke coil and even direct replace the vertical IC.
This is a normal procedure for those who have vast experience in electronic repair and truly understand how a particular circuit works. What if you are new in this repair field or don’t really understand how the circuit work? Then how are you going to solve the problem? Easy! Just direct replace the suspected section IC and check all the surrounding components. Let me put it into a better picture. A color problem usually related to the color board of a Monitor. If you don’t understand how a color circuit work-never mind, what you do is just direct replace the color IC (usually the board will have two IC’s-one is the video pre-amplifier and the other is video driver IC) and retest the Monitor. If the Monitor works fine then your problem solved. However, if the problem still remains, then you have to use another method which is checking all the surrounding components.
You would not believe that many times the IC is not at fault and the real culprit was the surrounding components like a shorted ceramic capacitor, diode or even transistor. Two weeks ago, I came across a LCD Monitor with display shut off after few seconds. After some checking I confirmed that it was the inverter board faulty. It’s a small board with many SMD components on it except the high voltage transformers and couples of electrolytic capacitors. The inverter IC is a SMD as well and I do not have this part. I proceed to check the surrounding components first before decide to order the inverter IC online. Do you know what I found? I found a shorted SMD capacitor somewhere nearby the inverter IC. The value was 0.15 microfarad and a new capacitor brought the LCD Monitor back to life again.
Another case, it was a China made 15” Monitor, the high voltage rise up to 15 KV and shutdown after tested it with a high voltage probe. I suspect the horizontal circuit is causing the problem but a new h/v oscillator (TDA4857PS IC) won’t help either. Next I just solder out all of the surrounding components (components only related to horizontal pin out) and check one by one and found one of the resistor has gone up in resistance. I do have the choice to start tracing from the pins of the IC but I found removing all surrounding components and test which is faster.
This method also can be use if you can’t find any data for a particular IC, for example a new equipment model in the market. As mentioned above it is not necessary always IC’s fault. However, if you have confirmed that all of the surrounding components tested okay then chances are high that the IC indeed faulty. This is true only if you are really sure that the circuit is the cause of the problem. In other words, you would not replace horizontal/vertical oscillator IC when there is a color problem would you?
Although you can repair electronic equipment by checking all of the surrounding components, in fact I do encourage you to learn beyond than that such as voltage and signal tracing as these methods can really speed up your repair work. You must also learn how to read a schematic diagram as well. I want you to know that some problems can’t be solved by only checking surrounding components. For instance, if the h/v oscillator IC didn’t send a signal to the gate pin of B+ FET, the display will become small (small width). Now if you check all the surrounding components in the B+ circuit, I’m sure you would not find any bad component there because the problem is in the h/v oscillator IC and this IC is located a bit far from the B+ circuit. Your time will be wasted and the problem can’t be solved!
Conclusion- This article act as a guide to assist you so that you can use the checking surrounding components method on whatever type of equipment you want to repair include boards that use lots of SMD IC’s. Your basic electronics and testing skill have to be strong otherwise a bad component you might think it is good and at the end you will not be able to detect the fault. Continue to learn and improve yourself and I believe one day you shall achieve what you want to be. All the best to you!
Jestine Yong is a electronic repairer and a writer and if you want to become a professional in testing electronic components please visit his website at http://www.TestingElectronicComponents.com
Sennheiser Headphones - 7 Reasons Why Theyre Great!
Sennheiser Headphones - 7 Reasons Why They’re Great!
Sennheiser Headrings are one of the most amazing pieces of technology to give you great sound, and make a great organize to give to guidely or everybody you worship. They surpass many other calls that are out right now, and can be found in a pure cost boundary as well. This particular call factory hard to give great assetr satisfaction, and has done so with their fantastic line of headsets that work great for almost any use.
They are addict affable, elegant, and the record just goes on and on. What kind of cans do they have? Here are just a few of the types: battery and wireless, racket decline and cancabaling, headset and other different perfects and types.
#1 check Out Background racket
How many epoch have you been recordening to your choice song and then a bus goes by or somebody is chatting loud next to you and you skip that “had to examine it” part of the song or what? Well that won’t occur with this headset call. The stopped ear cups keep farther racket farther, making it greatly easier and more enjoyable to recorden to tune almost anyplace. So, let the world slither by and give guidely that recordening pleasure you deserve.
#2 Great project
different most other headset companies on the promote, these ones are plain yet elegant. They have only a few buttons that obscure the necessities, yet look great enough to take with you anyplace when on the go. They are extensive-sized yet lightweight and calm to take with you, making them the last present when looking for the complete headset call to affix with for life.
#3 Comfortable
Wrapped in comfortable padding and fabric, the Sennheiser headsets are a must have. They won’t get uncomfortable after tiresome them for a few songs, especially while they frame your ears to give the last recordening experience. Their lightweight project makes it look like they aren’t even there, so you can recorden during many of your standard day-to-day activities.
#4 Very abuser welcoming
Even although the hottest in technology over the older few days have been absolutely amazing, it is someepoch pleasant to be able to simply use a upshot to its extensive boundary. That is viable when you asset this call of headset, while there are no bizarre buttons or menus to fiddle around with. The essential dials, such as size, country, and tuning dial, are all included, making it viable to recorden to tune lacking having to squander hours recital an holder’s guide. They can be worn right out of the packaging, and are great for everybody who is technology-illiterate.
#5 Durability
Get rid of the agonize and worry about them falling or accidentally fljaunt, while the brawny project makes them secure and eager to take on the world. They are great for winning on the go because they can be fearful into a reward or bag with no unruly, or you can even toss them around your stem for a passing jaunt. Don’t agonize about your children with this particular call, because the padded circlet is brawny yet lightweight at the same time. They are very well value the money you squander that can be approved on to outlook generations, as long as they are full nursing of and not abworn.
#6 Ambient Sound Capability
You will never have to agonize about not being able to examine your contacts chatting or your cabal ring ringing, while tiny microrings are worn to choose up and transmit ambient sound to the addict. The tiny microrings can distinguish close important sounds such as a conversation from background sounds, making it viable to have an amazing recordening experience. The important racket is examined and the grating cram gets left behind.
#7 cost
These cans may be more dear than some of the calls that can be assetd at native superstores or drug marts, but they are well value the cost. They surpass all other calls inside the same cost boundary, and operate greatly better than any other business can petition. They boundary from about $100 to $500 depending on the perfect, and can be worn for days and days to come. The Sennheiser headsets have an amazing cost that can be afforded by many, but vacation people concern like they are living the comfy life.
Sennheiser headsets give you great wireless eminence and sound. Give guidely the convenience to move around the house or recorden to your choice football match or film lacking disturbing, or you disturbing them with a set of Sennheiser RS-130 wireless headsets. Affordable sound and convenience for your choice tune or show.