LCD display inverter is the highest failure rate components. inverter engaged in the maintenance of traditional monitors maintenance or electrical repairs, a senior technical staff to some extent, is not a difficult task, we do not make in-depth discussion. We only board for LCD repair, explore the inverter of the substitution problem. In the routine maintenance, we often come into contact with the LCD inverter is divided into two categories: one category is used in all brands LCD monitors dedicated inverter, one is Shenzhen, the production of common parts as a common inverter. Special brand of machine used in inverter is damaged it is often difficult or expensive to buy, no hope in the maintenance of the premise, instead of using general-purpose inverter has become a very important maintenance tool.
Whether dedicated or general-purpose inverter inverter, their structure and function in the circuit design is not essentially different, in the same supply voltage, drive capability is completely under the same conditions can be used to replace the special high-pressure common inverter board. Lamp that can be driven by the number of points, the common inverter with a single light inverter (commonly used in the following 8-inch screen, laptop screen, etc.), dual-lamp inverter (part of the 15-inch screen), four-lamp inverter (most 17-inch, 19 inch screen), six light inverter (20-inch screen) and so on. Backlight interface, according to the form of distinction, the narrow mouth and wide mouth of the difference. Voltage inverter according to differentiate, a common 5V supply, l2V power, l8V power and 24V power supply and a few species. In the desktop LCD monitor, the most commonly used is l2V power inverter. Meanwhile, the dedicated inverter interface definition because different manufacturers and models are often not consistent; while there are many general-purpose inverter their brand of products is the same interface definition. However, the inverter is now producing more and more enterprises, contact surfaces must be limited, so there is a common interface definition different inverter is also unknown.
The inverter instead of a dedicated board with a common time to note the following:
1, the operating voltage to be consistent
2, the number of backlight and interface style interfaces to be consistent
3, the drive power to match
4, installation of a suitable size to
5, the common interface board is correctly connected to the corresponding interface driver board
Even without the relevant information, inverter interface definition in general is relatively easy to determine. First, find the interface to supply part of the VCC, GND, connected OK, and then find the inverter switching ONOFF and brighter side ADJ, ADJ generally easier to find, it is usually followed by a resistive transistor. If you can not distinguish, switch ONOFF and can brighten any connected terminal ADJ, does not shine and then transfer over then. Just make sure the power supply part of the VCC, GND, or do not take the wrong tone against the general will not damage the pressure plate. Interface can also be measured voltage values ??to distinguish between, for example:
inverter interface is: VCC GND ONOFF ADJ NC
Reference Voltage: 12V OV 5V 2V OV
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