LED light bead small pitch display common faults and solutions

The use of SMD table mount lamp bead design LED small pitch display, although the price is much lower than the small pitch of COB package, but the long-term reliability in the use of a lot of restrictions, in this process, there are many customers will ask the "screen daily maintenance and maintenance" problem. Therefore, the technical support staff has summarized the following dry goods for your reference 01 Module dead or down lamp The reason: A dead lamp below 50ppm is a normal dead lamp phenomenon. Bump lights during installation, and accidentally knock lights during use. Maintenance method: Replace the problem module with a spare module. Upload the correction data of the corresponding spare module in the U disk. Indicate the reason for the repair on the replaced module, and the exact coordinate position of the module in the large screen must be marked. 02 Module color bar What HAPPENS: Abnormal vertical bar color appeared in the module: high, dark, steady on, red, green and blue color abnormal. Cause: The module chip is abnormal, the column of a lamp bead internal short circuit, PCB board line short circuit, extrusion between modules.   Maintenance method: Replace the problem module with a spare module. Upload the correction data of the corresponding spare module in the U disk. Indicate the reason for the repair on the replaced module, and the exact coordinate position of the module in the large screen must be marked. 03 A color block/bar appears in the module Symptom: A rectangle/strip color anomaly appears on the module. Cause: An IC on the module is abnormal. Maintenance mode: Replace the problem module with a spare module. Upload the correction data of the corresponding spare module in the U disk. Indicate the reason for the repair on the replaced module, and the exact coordinate position of the module in the large screen must be marked. 04 Module has no correction data Phenomenon: According to the unit of the module, the phenomenon of flower screen/Mosaic, or gray hair. Cause: The module does not upload correction data or the correction data is lost.   Maintenance mode: Re-upload the correction data of the module. The latter uploads the correction data of the whole screen. You can also choose to temporarily turn off the correction. 05 Module signal/power connection is abnormal Symptom: The black display of a single module is not displayed or is incomplete. Cause: The 5V power cable and signal bar of the module are improperly connected.   Maintenance method: Remove the module and plug in the 5V power cable or bar cable. more articles： https://www.sunriseleddisplay.com/production-suspended-transparent-led-screen-completed/  

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