First, LED display no signal output, because the control card voltage is not normal, flat cable plug the direction is not correct, send, receive card, check, the voltage is adjusted to the normal value, the card problem, replace.
Second, LED display screen shaking phenomenon, one is the control card, multimedia card address is not correct, re-adjust or replace. Another kind, if there is a slight jitter in the whole screen, it is because the power supply of the display screen is insufficient and the power supply can be measured. If the power supply voltage is lower than 190V, please adjust it to normal. If the power supply voltage is constant, please contact the company.
Third, the LED screen full screen bright line, because the computer crashes or power failure, restart the computer.
Fourth, the partial display panel does not light, and is followed by a long bright line, because the switching power supply to the board to provide +5 V power is not output, that is, power failure, you can first turn off the screen, measure the short circuit between the +5 V power supply and 0V . (Normally about 15Ω, less than 12Ω can be a short circuit, if the short circuit to find the short circuit, if the normal value of the cathode, indicating that the power supply is damaged, it must be replaced.
5. The two lines of the display unit are not on. The reason is that the integrated block HC245 is abnormal and must be checked and replaced.
6. If the power-off of the computer is caused by insufficient power and the computer and the LED display are used in the same way during the screen-opening moment, it is suggested that the user's display should use only one power supply to avoid electrical interference with the computer.
Upsetting Rebar Coupler, which is different from Rib Peeling Rebar Coupler. The rebar thread is made by upsetting machine, and rebar thread cutting machine. The thread made by chaser.
The advantage of this type of coupler is the thread is bigger than the rebar diameter. So the coupler connection is stable, and the tensile strength can reach standard requirement.
Bridge, tunnel, high speed railway, high tower and other stric construction, this type of upsetting coupler will be need.
The thread is precision, and it does't break the steel material inner structure.
We can manufacture the coupler surface with black or silver color.
Upsetting Rebar Coupler
Quick Rebar Coupler Joint,Mechanical Rebar Splicing Coupler,Upsetting Rebar Coupler,Building Material Rebar Coupler
BAODING JINDI MACHINERY CO., LTD , https://www.rebarconnector.com