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Friday, 5 December 2008       

Jestine Yong Profile and Articles




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1). Flyback Transformer-How to locate the ABL line
Whenever there is a complaint about monitorcontrast problem i will check on the flybacktransformer ABL (automatic blanking limiter)circuit

2). Ceramic Disc Capacitor-How to accurately test it.
The last article i mentioned about electrolytic capacitor breakdown when under load. In this article i will talk about the high voltage resin coated c

3). 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 s

4). Testing Transformer- How to accurately test a transformer
There is two types of transformers in the market- linear transformer and switch mode power transformer. The transformers design is different.Somet

5). How to Read CRT Tube Part Numbers
All picture tubes, whether monochrome or color type are identified by a specific code consisting of numbers and letters. The codes are different f

6). The Importance Of Current Sense Resistor In Switch Mode Powe
Current sense resistor is usually located in the switch mode powersupply section. Newer version of monitor-the b+ (boost) circuitalso have thi

7). Understanding Transistor Data and Replacement
If, for some reason, you can’t get an exact replacement for the transistor that you want to replace, you can refer to one of the transistor substituti

8). Testing Diode-The Accurate Way on How to Test Semiconductor
Testing diodes is different from testing a resistor because you need a skill to do it.If you do not know or wrongly test a diode you will be unabl

9). Setting Up as a Electronic Repair Authorized Service Center
If you plan to upgrade your workshop into an Authorized Service Center, this should guarantee plenty of work and a secure future. Setting up from scra

10). What is a crystal ? And how to test it.
Crystal are use to keep the frequency of the clock from drifting. If the signal from this clock stops, or is weak, or the pulses begin to vary, the el

11). Testing Flyback Transformer-How to test and when to replace
Nowadays, more and more monitor comes in with flyback transformers problems. Testing flyback transformers arenot difficult if you carefully follow

12). The Right Way To Discharge Capacitor In Switch Mode Power Su
Switch mode power supply contain some large filter capacitors that can hold dangerous charges even if the unit has not been used for several days. Typ

13). How to solve multiple paper loading problem in HP5L and HP6L
Have you ever encountered before the problem of having multiple paper loading in your HP LaserJet 5L and 6L? Do you know that this is caused by a

14). 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

15). What is a Fuse ? And how to test it.
A fuse is a very thin wire, which either melts or vaporizes when too much current flows through it. The thin wire may be made of aluminum, tin-coated

16). Electronic Schematics Diagram-The Four Commonly Asked Questi
I came across quite a number of questions about electronic circuit schematics diagram.Most of the question asked are:a) Do we really need a sc

17). Electronic Books and Magazine can be among your cost effecti
Electronic servicing is, as they say, a “growth industry”. With many new electronic products and equipments reaching the market, there is a large dema

18). Five Band Resistor Color Code-What Does The Last Band Of Whi
In electronic repair, most of the time i came across five band resistor color code. The purposeof using the five colour band resistor in a circuit



 


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