The customer uses an LCD splicing screen at the site. Customer feedback makes it easy to burn the output board of the matrix. After multiple tests and evaluations by Geffen Technology, although the output board has ESD protection, the chip in the rework burned board is burned by rework. There is a high probability that the original is caused by improper grounding. 3.3. We speculate that there should be frequent on/off equipment at the customer's site. Because there is no good grounding, the "ground" voltage difference between the devices causes the chip to burn out (not due to static electricity) when powering up.

The actual way of grounding - the signal source
● DVD: Generally the national standard eight-figure tail two-phase plug. It is impossible to touch the earth.
●Camera: Generally powered by an external 12V power adapter, with a two-phase plug at the end of the national standard. It is impossible to touch the earth.
●Notebook: external power adapter, generally a three-phase plug (including grounding pin) at the end of the national standard.
●It is necessary to confirm that there is a grounding pin in the socket (there is a grounding pin in standard construction)
●PC: Built-in power module, generally the national standard product suffix three-phase plug (including grounding pin).
●It is necessary to confirm that there is a grounding pin in the socket (there is a grounding pin in standard construction)
● Actual grounding method - matrix
●All are three-phase plugs (including grounding pins) at the end of the national standard.
● It is necessary to confirm that there is a grounding pin in the power strip (there are grounding pins in standard construction)
●The chassis is separately equipped with a ground screw. Purchase a compliant grounding cable to connect to the grounding of the cabinet.
● Actual grounding method - display device
●Ordinary LCD TV: Generally a two-phase plug at the end of the national standard. It is impossible to touch the earth.
●LCD display: generally a three-phase plug (including grounding pin) at the end of the national standard.
●It is necessary to confirm that there is a grounding pin in the socket (there is a grounding pin in standard construction)
●LCD splicing screen: the power module used for regular splicing screen is generally a three-phase plug (including grounding pin) at the end of the national standard product.
●Informal splicing screen, which may use an ordinary TV power module, adopts a two-phase plug at the end of the national standard. It is impossible to touch the earth.
● Even if the power module adopts the three-phase plug of the national standard product, it is necessary to confirm that the grounding pin of the AC power socket is connected to the ground of the driver board.
●LED dot matrix wall: the power module used for regular dot matrix wall is generally a three-phase plug (including grounding pin) at the end of the national standard.
●It is necessary to confirm that there is a grounding pin in the socket (there is a grounding pin in standard construction)