| |
| |
|
Hardware Information |
|
|
|
How to Read Zener Diode Code
Many technicians are confused on how to really read a zener diode code. There are many types of code number indicated on it's body. The look and shape of a zener diode sometimescan be mistaken to be a normal signal diode. To differentiate it, is by looking at the codenumber on it's body- whether it is a normal diode or zener diode. Thanks to the manufacturers where their main boards are printed with the word 'ZD' which referred to zener diode and 'D' means a diode. However, from my experienced some printed circuit board the marking of 'D' also can represent zener diode. This will misled a technician into believing a zener diode is actually a diode. We as a technician or engineer must know or be sensitive about the marking. The only way to find out is by referring the code number printed on the component's body from a semiconductor data book. Without data book it is quite difficult to know the actual zener diode voltage. If you do not have the data book you may go to google search engine and type the following code and hope you can find the answer there! A wrong substitution of zener diode may caused your equipment to malfunction and sometimes will even blow your equipment. Time and money are loss due to that we lack of knowledge of identify the right zener diode voltage. If you are unable to identify the code, do not worry as this newsletter are here to guide you to successfully on how to read the zener diode code. 5.1=5.1Volt zener diode 5V1=5.1Volt zener diode 12= 12 Volt zener diode 12V= 12 Volt zener diode BZX85C22=22Volt 1 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE) BZY85C22=22Volt 1/2 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE) Note: There is also part number such as BZVXXXXX where you have to find it from ECG SEMICONDUCTOR BOOK. 1N4746= 18 Volt 1 watt zener diode (refer to ECG PHILIPS SEMICONDUCTORS MASTER REPLACEMENT GUIDE) 6C2=6.2 Volt zener diode. (If you look at the zener diode code it is written as 6C2 READING FROM TOP TO BOTTOM) Don't read from bottom to top otherwise the value you get is 2C6 which you cannot find from data book! I believe many will ask how do I get the voltage for the code of 6C2. Still refer to ECG book, you have to search for HZ part number. That's mean instead of finding 6C2, search for HZ6C2 and you will get the answer! The lowest zener voltage that I came across was 2.4 volt and the highest was 200 Volt 5 watt. Conclusion- Be alert when checking the part number of a zener diode. Don't always assume that a small signal diode is always a zener diode. Carefully observe the marking on the main board and read the zener diode part number refer to the semiconductor book, preferably ECG SEMICONDUCTOR DATA BOOK which you can get from your local electronic distributor. With this knowledge in mind, you will be successfully find the right voltage of a zener diode. Jestine Yong is a electronic repairer and writer. For more information on electronic repair please visit his website at http://www.noahtec.com
MORE RESOURCES:
Hardware - Google News |
|
|
|
RELATED ARTICLES
Wireless Notebooks: What You Need To Know About Going Wireless! It's not exactly breaking news that our world is becoming increasingly wireless. Many of our daily activities that once needed a wired connection can now be done wirelessly!The cell phone craze was probably the first revolution that seemingly happened overnight. How to Shop for Inkjet Printer Cartridges Keeping Shipping Costs DownWhen shopping for inkjet printer cartridges online keep in mind that postage can add significantly to the cost of a single inkjet cartridge. In some cases the cost of postage can be as much as the cost of the inkjet printer cartridge effectively doubling the price you pay. What is EEPROM ? EEPROM stands for Electrical Erasable Programmable Read Only Memory and also referred to as E²PROM. As the name suggest, an EEPROM can be both erased and programmed with electrical pulses. Laptop Computers Instigate Classroom Revolution! Have you noticed that laptop computers are beginning to dictate what happens in the classroom? Additionally, mobile technology is changing where learning takes place. This is especially true as laptops are entering the educational arena in ever increasing numbers. A Guide to Refurbished IBM Laptops IBM boasts a very large array of older and newer refurbished laptops on their website ibm.com. Printer Ink Cartridges - The History You are working at your computer and trying to print out important documents and all at once you find you are out of ink. Years ago that would have presented a big problem. Two Essential Accessories For Notebook Computers A Good Notebook BagForget those that are bundled with your notebook computer. Get yourself a good notebook bag that is well-padded both on its load-bearing straps, and 100% around the notebook itself. Five Band Resistor Color Code-What Does The Last Band Of White Color Represent? In electronic repair, most of the time i came across five band resistor color code. The purpose of using the five colour band resistor in a circuit is that it provide a more accurate value compare to the four color band. How To Choose The Best Gaming Laptop The gaming laptop is coming of age! It is steadily increasing in popularity as performance quality goes up. Gamers now regularly consider laptops or notebooks when searching for that perfect gaming machine. A Technical Introduction to Audio Cables What is so important about cables anyway?One of the most common questions asked by consumers faced with purchasing cables for their audio or home theater system is, "What is so important about cables anyway?" They can cost as much or more than some of the hardware in the system and to many it is difficult to understand why wire isn't just wire.To begin to understand how audio cables work, we have to start with the two fundamentally different types of audio cables you are likely to have in your system. War of the Disks: A Close-in Analysis of the Hard Disk Drive vs. the Solid State Disk Much has been written about solid state disks (SSDs) becoming the next big thing1 in the IT industry(1). But as to whether or not we have enough knowledge of how it will revolutionize the industry is a different question. Facing DVD Software Dilemma? Its Brainlessly Simple 1. Pocket DVD Wizard http://www. Laptop Security -Where'd My Laptop Go? Laptops are lovely. They are convenient, mobile, powerful and prestigious. ESR Meter - The Capabilities To Check Beyond Electrolytic Capacitor 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. Adding Serial Ports to a Computer with Only USB Ports So you bought a new computer but you don't have serial ports?It's surprisingly common these days - you find an awesome machine that does everything you want it to do, but then you get home and find out that amongst the lightning-fast processor and terabyte hard drive, you're missing something - a serial port.Most laptop manufacturers have killed RS-232In an effort to enforce newer standards, such as USB and FireWire, many laptop manufacturers have let serial ports fall by the wayside. How to Add or Remove an IDE ROM drive CD ROMS - If you're adding or removing an internal cd-rom, dvd-rom, or just about any internal ROM that has an opening CD door, read on. Almost all IDE devices such as CD-ROM, DVD-ROM, etc. Routing, Routed, and Non-Routable Protocols ROUTING PROTOCOLSA generic term that refers to a formula, or protocol, used by a router to determine the appropriate path over which data is transmitted. The routing protocol also specifies how routers in a network share information with each other and report changes. Personal Asset Preventive Maintenance Software Personal asset preventive maintenance software exists to help people manage and maximize the value of their assets. Common types of personal asset preventive maintenance software deal with taxes and investments. Motherboard Basics A recent Tech Tip covered the basics of selecting a computer case and made mention of the various sizes that correspond to motherboards of different form factors. A few people wrote in expressing interest in understanding more about the basics of motherboards, and that's exactly what this Tech Tip intends to address. Is A Laser Printer Right For Me? The average home computer user definitely does not need a laser printer. Sure laser printer prices have fallen considerably in the last couple of years.
|
| home | site map |
| © 2006 |
