| Phenomenon |
Problems |
Solving |
| No Display |
AC power off |
Turn on the power |
| PC off |
Turn on the PC, enter into our software |
| Communication cable cut off |
Check cables£¬connect cables again |
| Control system broke down |
Change the control system |
| Receiving card no power |
5V voltage |
| Software setting wrong |
Reset the program |
| Flash |
Control system broke down |
Change the control system |
| Communication cable signal loss |
Check cables£¬connect cables again |
| Control system voltage abnormal |
5V voltage |
| Software setting wrong |
Reset the program |
| Box No Display |
AC power off |
Check if 3 thread coupling connector is loosen Check if 3 thread coupling connector is cutting off |
| No input signal |
Check the green lamp of the receiving card, if not flash 1£®Check if 3 thread coupling connector is 2£®Check if 9 thread network cables are open or short. 3£®Check if the power of receiving cards is 5V. If all checks are correct, please change the receiving card |
| Module No Display |
Module Voltage |
The voltage is 5V |
| Signal cable between boxes is open |
Change the signal cable |
| HC245 not working |
Change HC245 |
| Half Module No Display |
Half module signal |
Check CP¡¢SC¡¢CT signals |
| Dark part signal |
Check the first TB62726's pin 2 |
| Module out of Control |
CP¡¢SC signal is open or short |
Check the control signal between the input of the module and HC245; Check the control signal between HC245 and the output of the previous module(CP,SC) |
| HC245 not work |
Change HC245 |
| Half Module Out of Control |
The next module works normally, the SC signal of this module is open or short. |
Check if the signal between SC and HC245 is open, or it is shorted by other signals |
| The same part of next module is out of control, the CP signal of this module id open or short. |
Check if the circuit between CP signal of this module and HC245 is open or shorted by other signals |
| Module 4*4 Matrix No Display |
The circuit between TB62726's pin 23 and the external resistor is open. |
Weld the pin 23 and the resistor again |
| TB62726's pin 22 is a rosin joint or a open circuit. |
Weld pin 22 again or use wire jumper to connect the open circuit |
| Module 4*4 Matrix Dark |
TB62726's pin 1 is a rosin joint or a open circuit. |
Weld pin 1 again or use wire jumper to connect the open circuit |
| TB62726's pin 24 is rosin joint or an open circuit. |
Weld pin 24 again or use wire jumper to connect the open circuit |
| Shadow When Display Texts |
CT signal |
Check circuits between CT and HC14 and HC138 |
| Dots Out of Control |
LED doesn't work |
Change LED lamps |
| Rosin joint |
Weld again£»Check correlative TB62726's output pin, Weld again if necessary |
| Short circuit |
Cut off the short circuit |
| Open circuit |
Connect circuit with wire jumpers |
| Constant lighting |
Cathode of LED is short to ground, Change TP62726 |
