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. Since it can be both electrically written into and electrically erased, the EEPROM can be rapidly programmed and erased in circuit for reprogramming without removing them from the circuit board.
EEPROM is also called a non-volatile memory because when power is turned off the stored data in the EEPROM will not be erased or intact. New EEPROM have no data in it and usually have to program with a programmer before it can be use. Information stored in this type of memory can be retained for many years without a steady power supply.
What is the function of EEPROM? EEPROMs are used to store user programmable information such as: -
? VCR programming information
? CD programming information
? Digital satellite receiver control data
? User information on various consumer products
EEPROM in monitor performs two functions:
? When a monitor is switch on it will copies all data or information from the EEPROM to the microprocessor. For example, the EEPROM will let the microprocessor know the frequencies at which the monitor is going to operate.
? The EEPROM is used to store the current settings of the monitor. The settings of the monitor will not be erased even when the monitor is turned off. Anytime a change is made in the monitor settings, the microprocessor updates the setting in the EEPROM. When the monitor is turn on again, the stored settings are used to set up the monitor for operation.
What are the symptoms if the MONITOR or TV's EEPROM data is corrupted or damaged?
? No high voltage (no display).
? Horizontal or vertical frequencies run.
? Cannot save (store) current setting.
? Certain control functions like sound, brightness and contrast control does not functioning.
? On Screen Display (OSD) does not function or the OSD have a corrupted display.
? High voltage shut down (EEPROM set the horizontal frequency way too low or twice the line frequency perhaps leading to failure of the horizontal output transistor (HOT)).
What is an EEPROM programmer or copier?
EEPROM seldom fail, they just lose or have their memory (data) corrupted may be due to high voltage and static discharge from a monitor. Once reprogrammed they are as good as new. As mentioned earlier, new EEPROMs are blank and need information or data to be loaded in order for it to functions. The job of copying the data into an EEPROM is done by a programmer or a copier. Programmers comes in all shapes and sizes. You can copy these devices for repair replacement only. You cannot copy them for resale without a letter of approved from the vendor who produced them. There is quite a number of companies selling EEPROM programmer:
Typical EEPROM part no:
24C02, 24C04, 24C08 etc
24C325, 24C645AT17C65, AT17C128 etc
93C06, 93C46, 93C56, 93C66 etc
25010, 25020, 25040 etc
Jestine Yong is a electronic repairer and writer. For more information about electronic repair please visit his website at http://www.noahtec.com
This is the first step to servicing, upgrading or removing... Read More
Wireless Networking, Part 1: Capabilities and HardwareThese days it isn't... Read More
It's easy to be intimidated by all the laptop models... Read More
Testing diodes is different from testing a resistor because you... Read More
In the past computers and their accompanying printers were huge.... Read More
There are many fancy add-ons for computers, but the basic... Read More
Most people understand preventive maintenance like changing the oil in... 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
To Wire or Not to Wire Wireless networks... Read More
Flash your ATI video card BIOS.You will need the following:1.... Read More
Someone recently asked me "I teach senior citizens in a... Read More
Hard drives - Hard drives are a little more complicated.... Read More
Video technology has increased significantly over the past years, and... Read More
Tablet PCs are great. If you are a mobile person,... Read More
Video displays are most recent technique used in both outdoor... Read More
Used laptop computers are everywhere these days. How can you... Read More
If you have not seen the newest addition to the... Read More
Before you upgrade your PC hardware it's best to search... Read More
You've laid out good money for your laptop computer, but... Read More
If you're a bargain shopper looking to get the most... Read More
Picking your way through the ton of information available on... Read More
We live in an area that has begun to... Read More
If you are like most student's, money isn't exactly growing... Read More
Time is one of the most important things we have... Read More
When Quality is the Target, but not the Result, what... Read More
Expansion Cards Part 2: AGPThe first in this series of... Read More
Offering secure public Internet access is not as easy as... Read More
EEPROM stands for Electrical Erasable Programmable Read Only Memory and... Read More
The Celeron and Pentium Processors are two of Intel's best... Read More
Moving the office network? How hard could it be? Anybody... Read More
With technology advancing more every day, electronics have become smaller... Read More
So you know a little bit about tape backup, but... Read More
Video technology has increased significantly over the past years, and... Read More
The other day my son said to me, what else... Read More
RAID is short for Redundant Array of Independent (or Inexpensive)... Read More
PC cooling systems are one of the hottest - and... Read More
It's most peoples worst computing nightmare. You wake up in... Read More
A surge protector [AKA surge suppressor] is an electrical plug-in... Read More
If you're a bargain shopper looking to get the most... Read More
Many people simply go to the retail store and get... Read More
Have you noticed that laptop computers are beginning to dictate... Read More
We all know that computers change more then any other... Read More
We have finally advanced to a time when technology can... Read More
You've laid out good money for your laptop computer, but... Read More
There is a great need for preventive maintenance in correctional... Read More
A fuse is a very thin wire, which either melts... Read More
Data Centers are the core of the Internet. The computer... Read More
My mother always told me to dust, but I never... Read More
Junk faxes waste the resources of every business. It is... Read More
Many technicians are confused on how to really read a... Read More
Time is one of the most important things we have... Read More
Picking your way through the ton of information available on... Read More
You really enjoy those dvd movies and games and the... Read More
What is Video Encryption?Video Encryption is an extremely useful method... Read More
Even with the popularity of digital technology, and the availability... Read More
The other piece of vital equipment to accompany the rack... Read More
For years, I smugly prided myself as a non-fax machine... Read More
Things to Consider When Choosing a Computer CaseIn the past,... Read More
A revolution in learning technology has taken place. Actually, it... Read More
If you are like most student's, money isn't exactly growing... Read More
Selecting motherboard is really simple. As name suggests "Motherboard" acts... Read More
Throughout the years there have been many technologies involved with... Read More
Notebook computers are becoming very popular. They seem to be... Read More
A laptop computer certainly provides you with an unprecedented level... Read More
Whether you are crunching figures at a front office job... Read More
Computer Hardware |