Fault Symptom Failure Cause Failure Analysis Processing
A unit board is not bright 1, no +5 v
2, the data line is bad 1, the power is bad, replace the power supply
2, replace the data line
The whole screen is not bright 1, the main controller is not +5 v
2, the entire screen AC no
3, the computer is not set 1, the power is bad, replace the power supply
2, check the power supply circuit
3, re-set.
A unit of red (or green) is always bright 1, the connection of the unit data line problems
2, the corresponding distribution board has a problem
3, a fast cell board failure 1, re-insert the data cable, pay attention to the direction
2, for a data line
3, replace the distribution board
4, root change unit board
Communication is not normal 1, the software is set correctly
2, whether the communication line is connected
3, MAX323 has a problem 1, restart the computer, re-switch the display.
2, re-set.
3, with a digital table for measurement.
4, replace this piece of MAX232.
The whole screen horizontal separated several lines of light, separated by a few lines do not plug the network cable is not plugged into a good line
Large screen display normal, computer black screen computer settings are not reset
The first few pages of information is normal, after a few screen is not normal 1, the screen capacity is limited, too much information
2, the memory device does not erase 1, re-send, minus some unnecessary information
2, re-send
Information team, but the font does not make the size of the information and the size of the screen does not match the size of the information, the size of the screen and set the size of the same