test card

In fact, the principle of maintenance electronic screen is very simple, the unit board is powered on, and then the signal input can be displayed normally. Buy a universal meter to measure the voltage. If the unit board is abnormal, replace the unit board. If the power supply voltage is abnormal, replace the power supply.
Author:Cai qiuqing   Time:2021-09-13 14:36 Browse(null)
A. The whole board doesn't light up
Author:Yang Dong   Time:2021-09-12 11:20 Browse(null)
It's good to keep the direction of the lines consistent. The order is from right to left. There is a row of red lines on the lines, which can make all the lines face up in red or make all the lines face down in red.
Author:Li Pengtao   Time:2021-09-06 13:34 Browse(null)
The fault analysis and common treatment methods of LED display are analyzed
Author:Song Wei   Time:2021-08-28 14:37 Browse(null)
1. The quality is not good
Author:Ones self entertainment   Time:2021-08-03 15:42 Browse(null)
Working principle of LED electronic display screen
Author:Mr. li   Time:2021-07-04 08:04 Browse(null)
Adjustment of the pattern of large screen LED electronic display screen
Author:Du Wenwen   Time:2021-07-03 17:55 Browse(null)
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