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Matrix Switching System—User Manual

8.0 Communication Protocol/Control Command Code

Communication Protocol: Baud rate 9600bps, no odd or even calibration bit address,

8bit transmission address, 1bit stop address. Please refer to the “Command list.pdf” in

the CD-ROM for more related Command Code information.

9.0 Troubleshooting

1. What do I do if the HDMI matrix front panel switching keys are not responding?

Answer: The HDMI matrix front panel keys employ scanning testing and require longer

response time. Press and hold the keys for 2 seconds. This will ensure key

switching will be responsive in operation.

2. What do I do if matrix does not display or color display is abnormal after hot plug?

Answer: Switching of the matrix system goes through the IC chips. If the voltage

difference between the input signal equipment and the matrix equipment is too

large, hot plug could easily cause damage to the IC chips. Please turn off the

power to the system before plugging or unplugging.

3. What do I do if there is a loss of color reproduction, or no video signal output?

Answer: Please check if connectors at both ends of the HDMI signal cable are correctly

connected.

4. What do I do if the serial port (usually refer to the computer serial port) fails to control

the HDMI matrix?

Answer: Check that the communication port set by the control software is correctly

connected to the corresponding serial port of the equipment. Also, check to

see if the computer communication port is in good order.

5. What do I do if the corresponding graphics fail to output during HDMI matrix

switching?

Answer:

(1) Check if there is signal on the input end. If there is no input signal, it could be that the

input connection cable is broken or the connector gets loose. You are advised to

replace the connection cable.

(2) Check if there is signal on the output end. If there is no output signal, it could be that

the cable is broken or the connector gets loose. You are advised to replace the

connection cable.

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