Building intercom system installation and commissioning

First, equipment preparation before installation

1. Before the equipment is installed, it is necessary to conduct a comprehensive inspection of all the lines of the system, whether there is a disconnection or a short circuit;

2. After confirming that there is no fault in the line of the entire system, the equipment can be installed. Solder must be added to the contacts of the wiring.

3, the installation of equipment must be in strict accordance with the instructions attached to the product or installation manual for correct wiring.

Second, the system before power debugging

1. After the equipment is fully installed, it must be fully checked whether the wiring of each part is correct; if there is a wrong connection, the whole system may not work properly.

2. Check if the power cord is connected incorrectly, and if there is a short circuit between the positive and negative poles, otherwise the device will burn out the equipment and its related circuit equipment, which will cause serious fire.

Third, the unit building intercom and visual part of the debugging

1. Under the condition that the line and wiring are correct and the equipment is in good condition, the unit system can work normally after being powered on.

2. In the debugging of the unit building, first connect all the wirings of the host computer and the lowest layer protector/decoder and indoor unit, and at the same time, number the extension's room number according to the instructions for use; Confirm whether the door host and underlying lines and equipment are normal.

3. If the normal work shows that the door host and the line and equipment are normal; then cut off the system power supply, and then connect the main line of the next layer of the system, the second layer of debugging (system power must be off), in turn up .

4. During the debugging of the unit building, it is necessary to start the debugging one by one from the bottom layer, that is, after the first layer is debugged, the second layer is debugged, and the debugging is continued until the whole unit is debugged. Commissioning is completed and it can work normally.

Under normal circumstances, the following voltage parameters can be used to determine the quality of the circuit or equipment by using the multimeter's voltage file;

Static, supply voltage and +B voltage to ground: 12V

Audio line A2 voltage to ground: 0V

Data line P voltage to ground: 0V

After calling the extension, the voltage of the audio line will change to ground: rise to 5.6V

At the same time, the moment of the call through the extension can be measured on the data line P line to a rapid change in pulse voltage between 0-5V change.

5. If the entire unit system equipment is installed and the wiring is correct, but can not work after power-on, the first power off only leaving the underlying protector/decoder, indoor unit and the door of the host is connected, that is more than two layers The bus of the protector/decoder is completely removed, and it is confirmed whether the main door and the bottom protector/decoder and the indoor unit are normal. If it is normal, the fault is in the protector/decoder or indoor unit above the second floor. In this way, you must find the root cause of the fault layer by layer.

6. If you encounter the above fault, if the floor is high, you can use the "golden section method" to check the fault, that is, disconnect the middle floor (if the 20 floors need to be disconnected in the 10th floor) above the protector/decoder. Bus, restore the bus connected to the second floor, confirm the fault is specifically in the middle layer or above the middle layer, according to this method can quickly identify the root cause of the fault.

7. As long as the wiring between the indoor unit and the protector/decoder is correct, the connection cable between the protector/decoder and the indoor unit is plugged in and the video line is connected. After the room number of the extension is programmed, it can be normal without debugging. jobs.

8. If the image of the indoor unit appears ghost or the image is distorted due to excessive signal strength, a 75-ohm-size carbon film resistor must be connected to the video output of the last protector/decoder at the top layer for attenuation. / Match the video signal.

9. If the image of the indoor unit is blurred or the image is white, the video signal is weak. You can adjust the video gain by turning on the video amplifier on the protector. The method is to place the three jumpers J1 on the protector side by side. J2, J3 from the original OFF dial to the ON place, at the same time by adjusting the protector on the 2 potentiometer to adjust the size of the video gain and high-frequency signal size. Specific methods can be taken to the side of the extension connected to the protector, while adjusting the potentiometer, while observing the image; generally low-level (7 layers below) does not need to open the video amplifier circuit; high-level (more than 20 layers) also only open a protector Video amplifier circuit can be.

10. During the call between the host computer and the indoor unit, if there is a harsh whistling sound or the sound of the host horn is small, you can use a small flat-blade screwdriver to perform the potentiometers VR1 and VR2 on the mainboard of the entrance door. Speaker, microphone volume adjustment.

Fourth, the community networking debugging

1. Before debugging the entire networking system, it is necessary to check whether the wiring of the entire networked trunk line and each trunk isolator is correct. The soldering must be added to all the contacts of the entire network line to increase the reliability of the system operation.

2. The shielded wire of the network cable must be connected to the weak grounding point in the master control room of the supervisor. After confirming the error, the entire networking system can be commissioned.

3, before the call must be set for each door host's local number, and the same host under the door number of the host can not be repeated, otherwise the door when the host calls the management machine, there will be more than one door at the same time the host is activated to call, Causes multiple doorway hosts to make calls and cause howling.

4. When the entire networked system cannot work, it is necessary to check whether the D1 and D2 data lines are connected incorrectly, especially if the D1 and D2 of the network cable are connected incorrectly, or if the network cable of one of the relay isolators is connected incorrectly, it will cause the entire network. Networked systems do not work.

5, under normal circumstances, the network data line D1 has a voltage of about 2.3V, D2 has a voltage of about 2.7V, D1, D2 data line voltage sometimes changes, usually between 2 ~ 3V, D1 and There is a difference in the voltage value of D2. If the voltage values of D1 and D2 are the same, the networked system will not work. When the call is in a call, the audio line A1 and the ground have a voltage of 5.6 to 6 V. If the voltages of the above parameters are abnormal, Must check the relevant lines.

6. For cells with few cell door hosts, if the equipment of the entire networked system is installed and the wiring is correct, but it cannot work after power is turned on, only the nearest doorway and relay isolator of the management center machine can be left. The network cable of the management center machine is connected, that is, the network bus after the nearest relay isolator is completely removed to confirm whether the networked system can work normally. If the system is normal, it indicates that the fault is in the nearest relay isolation. After the device is on the networking bus, it is necessary to find the source of the fault one by one.

7. When encountering the above faults, if there are more cells in the cell door host (more than 24 cell door hosts), the “golden split method” can be used to check the fault, that is, disconnect the networked bus on the middle of the intermediate isolator. In the intermediate relay isolator, access to the management center machine to confirm whether the fault occurs before the intermediate relay isolator or after the intermediate relay isolator, according to this method can quickly identify the root cause of the fault.