Thursday, January 5, 2023

Understanding SMD resistor code is very important if you want to be able to repair LCD Monitors. EachSMD resistor has a numeric number on top of its body. It would not take you a long time to understand it as the below guidance will show you exactly how you can calculate the ohms value easily.  0 = Jumper000 = Jumper 6R8 = 6.8 Ohm100 = 10 Ohm750 = 75 Ohm101 = 100 Ohm  164...
 Currently, the most commonly used light emitting device is a fluorescent tube called a cold cathode tube for CCFL. The CCFL is called a cold cathode tube because even though the principle of illumination is the same as that of the hot cathode tubes used by indoor lamps, this lamp does not require preheating of the filament.Also, the electrodes at the end of the...
 Most of the LCD Monitor has a Start Circuit to control the voltage from the power supply to the supply pin of Inverter IC. The main control signal comes from the Main board and the voltage is from 0 and few Volts (2- 5 Volts).If the signal is Zero Volts, then the inverter IC would not receive any supply voltage from the power supply and if the signal is 2 Volts (On)...
 For a newer LCD Monitor design, the inverter board is joining together with the power board as shown in the above photo. Older LCD Monitor has the inverter board separated from the power board as shown below. There are four types of inverter designs (topologies) used in the LCD Monitors.1.     Buck Royer inverter2.     Push pull...
The switch mode power supply used to power up LCD Monitor can be either the external or internal type. The function of the power supply is to convert the main supply AC 230 volts into DC output voltages to supply to the necessary boards in LCD Monitor.SchemaLCD Power Supply Board230 Volts AC supply enters the power supply and to the bridge rectifier ac pins (normally is the...
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