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Ceramic Disc Capacitor - How to Accurately Test It

02nd December 2009
The last article I mentioned about electrolytic capacitor breakdown when under load. In this article I will talk about the high voltage resin coated ceramic disc capacitor. In computer monitor, it is frequent used in the screen voltage (G2) line at the cr... Read >

How to Read Zener Diode Code

02nd December 2009
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 lo... Read >

Testing Flyback Transformer - How to Test and When to Replace It

02nd December 2009
Nowadays, more and more monitor comes in with flyback transformers problems. Testing flyback transformers are not difficult if you carefully follow the instruction. In many cases, the flyback transformer can become short circuit after using not more t... Read >

Flyback Transformer-How to Locate the ABL Line

02nd December 2009
Whenever there is a complaint about monitor contrast problem I will check on the flyback transformer ABL (automatic blanking limiter) circuit. Sometimes a weak picture tube might caused contrast problem. If the picture tube is good, I will go st... Read >

Testing a Transformer - How To Accurately Test A Transformer

02nd December 2009
There is two types of transformers in the market- linear transformer and switch mode power transformer. The transformers design is different. Sometimes it is just referred as ac transformer. Linear transformer mostly used in radio, project kits, VCD and... Read >

The Importance Of Current Sense Resistor In Switch Mode Power Supply

02nd December 2009
Current sense resistor is usually located in the switch mode power supply section. Newer version of monitor-the b+ (boost) circuit also have this current sense resistor. If you repair electronic equipment especially the switch mode power supplies, the cur... Read >

The Right Way To Discharge Capacitor In Switch Mode Power Supplies

02nd December 2009
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. Typical values of this type of filter capacitor are 220uf 250volt and 330uf 400volt! If you are going to w... Read >

Computer Monitor Flyback Transformer - Replacement and Substitution

02nd December 2009
The Computer Monitor flyback transformer comes with many types of parts number, designed and inductance winding values. Although some may have different part numbers, they can be use d to substitue on another model of monitor! The Monitor flyback tran... Read >

Samsung 153V LCD Monitor Power Supply Repair Tips

02nd December 2009
Troubleshooting Samsung 153V LCD power supply is just like troubleshooting those crt type. This monitor came in with no power symptom. If you are first time repairing this type of power supply, I recommend you to first remove the switch mode power tra... Read >

Samsung 510bn LCD Power Supply Repair Secrets

02nd December 2009
The complaint for this Samsung 510BN LCD monitor was no power, after the cover was opened I found that the power filter capacitor still hold some charge and the voltage was quite high. A good monitor by right the filter capacitor stored voltage should... Read >

NEC P8000 Printer Repair Secrets

02nd December 2009
If the complaint for NEC P8000 printer was a missing line across the printout, immediately we will suspect the printer head or the ribbon or even sometime the ribbon mask. Among so many brands of dot matrix printers, only this model has one common fau... Read >

Samsung 713N LCD Repair with SE7889-Lf ic Problem

02nd December 2009
This Samsung 713N LCD monitor came in with no display symptom and no power. In other words, once you switched 'on' you could see the power LED lights up (no display) and then for couples of seconds the power led light goes off. When I removed the signal... Read >

Understanding Transistor Cross Reference

02nd December 2009
All electronic repairers should know how to read the transistor cross reference equivalent book if they want to succeed in electronic repairs. The data sheet is very important for every engineers and technicians because it can help them to find the near... Read >

Epson Lx300 Printer Repair-No Power And Can't Print -Max232ic Faulty

01st December 2009
Intermittent no power was the complaint of this Epson lx 300 printer. As usual, the main suspect was the power on/off switch. After removing the power board from the printer, I could clearly see a dry joint at the pin of the switch mode power transfor... Read >

Understanding Monitor Flyback Transformers Internal Capacitor

01st December 2009
Troubleshooting Monitor flyback transformers is not difficult if you know what is inside the flyback. Normally for a monitor flyback transformer, it consists of the casing, winding, pins, high voltage cable, anode cap, divider, epoxy and a high voltage ... Read >
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