System operation management and maintenance points
As a public address system, system system functions must be maintained on a regular basis to maintain system performance. Public address system maintenance includes speaker loop maintenance, background music function maintenance, service call function maintenance, fire linkage testing and recording.
1) Speaker circuit maintenance. In order to ensure the normal operation of the system, the speaker circuit should be tested regularly to ensure the normal function of the circuit and can be used normally in emergency situations.
2) Background music function maintenance. Regularly test the background music function of the entire system to ensure that the system functions properly.
3) Service call function maintenance. Use business call broadcasts regularly to ensure that they function properly.
4) Fire linkage testing. For broadcast systems with emergency linkage function, fire tests should be conducted regularly to check whether the linkage relationship of the fire protection system is normal, whether the external broadcast is normal, and the system is in normal working condition.
5) History. The digital system has a software recording function. During the use of the system, the history records should be backed up regularly for query.
6) Electronic equipment is prone to failure due to dust and other images. During the use of the equipment, it should be cleaned regularly. The dust cleaning process should use cleaning tools (soft brush, blower, etc.), and do not transfer dust into the equipment.
7) When maintaining the cable, pay attention to the interface of the cable. Do not drop the connection.
8) During environmental maintenance, it is forbidden to stack items around the equipment. Keep the entire cabinet clean and tidy in the equipment cabinet, and ensure the ambient temperature and humidity of the equipment.
9) Regularly check the self-checking function of the broadcasting system to find out problems such as insufficient battery power, short circuit of control output circuit, and equipment that cannot be detected by the control program.
System failure analysis and maintenance
In the case of public address failure analysis and maintenance, if the broadcast system has equipment failure during use, the following tests should be performed:
1) Power supply detection: The equipment power supply system should be tested and the power cables of all the equipments of the vehicle should be properly connected to ensure the stable and normal operation of the power supply system of the equipment.
2) Device detection: The device should be tested to check whether the device is running normally, whether the function is normal, and whether the signal lines between all signal sources are correctly connected. For devices with replaceable devices such as fuses, the integrity of their devices should be reviewed periodically.
3) Line detection: The speaker line should be tested. Different systems have different detection methods. The digital system has a software recording function, which can analyze the external circuit through historical records. The conventional system can use the detection tool to detect the line.
4) Check whether the display of the panel or indicator of the system equipment is normal. Check the power supply, audio signal input/output, control signal input/output, connector, and similar equipment replacement for the faulty equipment to find out the system fault. Part.
5) The system with self-test program can start the system self-test program to detect the fault parts of the system, and check them one by one according to the system operation manual to eliminate the fault.
6) If the broadcast system still does not work properly, try segmentation function check, device interchange, etc. to determine the system fault location.
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