Flat panel monitor simple fault own inquiry

In order to search the LCD display in use of the fault, you can use the pointer-type multimeter rx10kω resistor file for tracing. This is a high resistance file, you can check the impact of the display of a variety of pass and break. And because it has 9~15v DC voltage, it can drive the LCD display, Judging whether the measuring device is normal from the display state. But since the multimeter outputs a DC voltage, therefore, it is best not to delay the test, so as to avoid electrochemical reaction. You can use the following tips to reduce DC damage, will be a pen in the hands, and then hold the liquid crystal display back electrode, and then use another pen to detect the rest of the electrodes, at this time, external power supply internal resistance Will be greatly increased, thus reducing the destructive effect of DC components.

Another way to use inductive mains for testing is also very practical. Take a pen or ordinary wire, wrap one end around the lamp or other electrical power cord, about 2~5 around. At this point, the wire will be induced to generate a weak AC voltage. This inductive voltage resistance is very large, with 50Hz AC induction voltage for general household appliances although useless, but used to drive liquid crystal display device is suitable. At this point, as long as the finger pinch liquid crystal display part of the back electrode, with the end of the wire to touch the electrodes in the section of the line, the segment of the pixel can be displayed. This method is very convenient to detect the quality of the liquid crystal display, however, as the current of the induction electricity is very small, but the voltage is still very high, therefore, sometimes in this way detection will find untouched pixels also appear crosstalk display, this is due to other external lines caused by the hanging, at this time with the finger light touch crosstalk display electrode , the crosstalk display disappears.