1 Look at the visual method to see if there is any rigid damage to the component (which is often caused during construction), whether the line is connected or disconnected (the worker accidentally picks the wrong one, or the owner's decoration is not connected correctly), and whether the component is burnt (generally) The current limiting resistor is scorched and the fuse is blown).
2 mainly to listen to the beating or whether the relay element fried (Oh horror of it but do not worry, fried dead people, but pay attention to safety yo gay); the unlock signal switching (such as video and audio power supplies, etc.), etc. should pay attention functions to achieve , If the jump test is a circuit problem or a bad relay contact, need to be corrected or replaced.
3 smell If you smell burned parts that are sure to be bad, they usually need to be replaced. Note that you must first find out why you can eliminate the problem (usually the wrong connection leads to reverse polarity of the power supply, and the signal line is connected to the power cable. ) It would be useless to continue to burn out the original and replace the accessories N times.
4 If you suspect any replacement parts (equipment) in question, can be a good accessory (device) replacement, such as troubleshooting accessories that bad on the contrary, no problem. For example, if a decoder or extension is connected, the whole unit cannot be called. If the entire unit is changed, it can be determined that the replaced decoder or extension is bad. Note that if the problem can not be solved after two replacements, it can be judged that the fault is not caused by this accessory, because any manufacturer is generally not likely to leave the factory with two devices, there is a problem, and can not continue to change, we must first find out the reasons for exclusion After the change, it is impossible to find a suggestion to contact the manufacturer.
5 is excluded parts broken part or system device, if the problem is solved or excluded, or that part of the equipment in question off the need to replace it may solve the problem. For example, if a unit failure is unrecognizable, if it is determined that it is not a host problem (that is, a good host still cannot solve the problem), it may be that there is a certain decoder in the unit, which is also called a platform (platform decoding fault isolation system ) Or extension (bus decoding system extension decoding) is a problem, there may be a problem with the unit main line; at this time we use exclusion of part of the exclusion. Can be eliminated with one-half, which is half-half-half-off, until the problem is solved, or even the last to 1 power supply 1 host 1 extension or 1 power supply 1 host 1 platform 1 extension (sometimes also added what signal amplifier) ​​to pick In the short-term, if there is no problem with the short-term connection, there may be insufficient power supply or interference, and even the manufacturer system cannot afford to do so much.
6 is to determine the fault coverage is determined generally as a unit and a position not unlocked, first look at the whole cell or of certain families do not lock or unlock one not, if the entire unit is not possible to unlock it without unlocking the host (if it is The power control lock is the problem that the power supply is not unlocked, or the electric control lock, the open lock line break, etc., can try with a new lock. It is also possible to directly output the voltage and current at the host's unlatching line terminal. If it is a part of the extension that does not unlock, it has nothing to do with the host and the electric lock, and it can find the cause directly on the extension or decoder. The same is true when not ringing. Finally, it is necessary to understand clearly what functions the system has been maintained, how to use it, the correct wiring diagram, the trend of the construction wiring, the phenomenon of failure, the time and condition of the failure (it can never be used to indicate that the system may not be Debugging is irresponsible for the project engineer or there is a problem with the manufacturer's product. This situation is more troublesome and may not be solved. The problem cannot be repaired; it can be used before but cannot be used, indicating that the system accessories can be repaired or replaced to restore the system. Some points can not be made clear, that maintenance is more difficult.
2 mainly to listen to the beating or whether the relay element fried (Oh horror of it but do not worry, fried dead people, but pay attention to safety yo gay); the unlock signal switching (such as video and audio power supplies, etc.), etc. should pay attention functions to achieve , If the jump test is a circuit problem or a bad relay contact, need to be corrected or replaced.
3 smell If you smell burned parts that are sure to be bad, they usually need to be replaced. Note that you must first find out why you can eliminate the problem (usually the wrong connection leads to reverse polarity of the power supply, and the signal line is connected to the power cable. ) It would be useless to continue to burn out the original and replace the accessories N times.
4 If you suspect any replacement parts (equipment) in question, can be a good accessory (device) replacement, such as troubleshooting accessories that bad on the contrary, no problem. For example, if a decoder or extension is connected, the whole unit cannot be called. If the entire unit is changed, it can be determined that the replaced decoder or extension is bad. Note that if the problem can not be solved after two replacements, it can be judged that the fault is not caused by this accessory, because any manufacturer is generally not likely to leave the factory with two devices, there is a problem, and can not continue to change, we must first find out the reasons for exclusion After the change, it is impossible to find a suggestion to contact the manufacturer.
5 is excluded parts broken part or system device, if the problem is solved or excluded, or that part of the equipment in question off the need to replace it may solve the problem. For example, if a unit failure is unrecognizable, if it is determined that it is not a host problem (that is, a good host still cannot solve the problem), it may be that there is a certain decoder in the unit, which is also called a platform (platform decoding fault isolation system ) Or extension (bus decoding system extension decoding) is a problem, there may be a problem with the unit main line; at this time we use exclusion of part of the exclusion. Can be eliminated with one-half, which is half-half-half-off, until the problem is solved, or even the last to 1 power supply 1 host 1 extension or 1 power supply 1 host 1 platform 1 extension (sometimes also added what signal amplifier) ​​to pick In the short-term, if there is no problem with the short-term connection, there may be insufficient power supply or interference, and even the manufacturer system cannot afford to do so much.
6 is to determine the fault coverage is determined generally as a unit and a position not unlocked, first look at the whole cell or of certain families do not lock or unlock one not, if the entire unit is not possible to unlock it without unlocking the host (if it is The power control lock is the problem that the power supply is not unlocked, or the electric control lock, the open lock line break, etc., can try with a new lock. It is also possible to directly output the voltage and current at the host's unlatching line terminal. If it is a part of the extension that does not unlock, it has nothing to do with the host and the electric lock, and it can find the cause directly on the extension or decoder. The same is true when not ringing. Finally, it is necessary to understand clearly what functions the system has been maintained, how to use it, the correct wiring diagram, the trend of the construction wiring, the phenomenon of failure, the time and condition of the failure (it can never be used to indicate that the system may not be Debugging is irresponsible for the project engineer or there is a problem with the manufacturer's product. This situation is more troublesome and may not be solved. The problem cannot be repaired; it can be used before but cannot be used, indicating that the system accessories can be repaired or replaced to restore the system. Some points can not be made clear, that maintenance is more difficult.