In the hebei region, problems with the burning of the main plate during installation occurred with the spread of smart door locks. Today we will analyse the common causes of the burning of the main board and share the use of circuit detection tools necessary for maintenance to help users avoid pits and solve problems。
I. Five common triggers for the burning of the main board lock on the smart door
1. Power access error
The smart door lock usually uses a 12v direct current power source, and if installed by an error of 220v, or when the voltage is unstable (e. G., failure of a sub-sector transformer), the instant high voltage hits the main panel circuit directly. It is recommended that the power be cut and wired, and that the voltage be confirmed with a mass form before operation。
2. Short circuit links
Fragmentation of the guidance insulation layer at installation, loose interfaces or direct contact with the positive negative line at wiring lead to excessive short-circuit currents. Metallic contact oxidation may also trigger short circuits in the damp wet weather in hebei, and lock links are periodically checked。
3. Static interference
In the dry season in the north, human electrostatics are not released in direct contact with the main plate chip and may pierce the electrostatic shield. It is recommended to wear electrostatic bracelets and release electrostatics from metal objects prior to operation。
4. Installation of poor environment
Long-term exposure to high temperatures (e. G. Hot sun in hebei summer vehicles) or high humidity can accelerate the ageing of the main plate's electrical capacity and resistance. The ageing of some of the old sub-districts may also lead to fluctuations in power supply, causing the main plate to malfunction。
5. Quality of the master board
The poor-quality master plate uses non-standard electronic components, which are less stable in a very temperate climate in hebei. It is recommended that the risk of burning be reduced through 3c-certified brand products that support wide voltage (100-240v)。
Ii. Circuit detection tools and usage methods
1. The general schedule
- voltage slot: a red and black tablet to connect to the main plate power input end to confirm that the voltage meets the specifications (e. G. 12v (1)(10%)). If the voltage is abnormal, the problems of power supply or transformers in the sub-districts need to be checked。
- electrical resistance: detection of short circuits for components such as capacitors, diodes, which normally have a single guide, and electrical resistance values ranging from hundreds to thousands of euros。
- note: switch to the highest level prior to measurement and avoid short-term burning of the table of all uses directly from the pen。
2. Circuit break tester
The quick determination of whether or not the steering line is channeled during maintenance is particularly relevant in the case of the fracture of the hebei winter line due to cold temperatures. When used, the probe will be exposed to both ends and the sound of the beep indicates that the road is normal。
3. Oscilloscopes
Specialized-level testing tools to observe the stability of voltage waves. In the event of intermittent failure of the main plate, the electro-voltage mutation point is captured with a oscillator, which can locate specific damage elements (e. G., electric drum packs, chip welding)。
4. Insulation electrical resistance tester
The insulation of the circuits is detected and the insulation layer of the main plate connected to the key vent in the humid environment of hebei. This is done by connecting the pen to the end of the line and rotating the handle to the indicator stabilization value (generally 20 m)。
Iii. Guidelines for maintenance of pits
1. Power outage operations: both detection and maintenance must be preceded by power outages and a 5-10 minute waiting period to ensure that the charge is released。
2. Step-by-step testing: first screen the power source, circuit and then test the main plate chip. When the north is very wet, the focus is on whether the main plate welds are oxidized and can be cleaned with alcohol。
3. Alternative test method: when a component is suspected of being damaged, it may be replaced with a single type of component (due to the matching of parameters) to avoid blind replacement of the whole main plate。
While it is difficult to lock the main board, most problems can be avoided through standard installation and proper testing. It is recommended that hebei users select a formal installation team and prioritize the use of specialized tools for maintenance to reduce the risk of secondary damage. It is hoped that the above will help science to cope with the failure of the smart door locks and the safe use of smart home products。
