Science and technology are growing faster today, but no matter how fast they develop, there are many kinds of power, solar, lithium, mobile batteries, and so on, but the power adaptors that are different from the ones that are usually 12v power adaptors. And 12v power adapters are very prone to errors. However, there were failures with respect to the maintenance of the 12v power adaptor and the 12v power adaptor. The following sub-editories will be shared in detail。
12v power adapter failure maintenance
12v power adapter, pull plug insert power plug, no sparks, indicating primary circuit failure. It's a good job to turn on the power shell。
Look carefully, there's no burns, no circuit boards, and there's no hot yellow on the back. We'll measure the power input end with a universal watch, stop the infinity, and the pointer doesn't react。
Attention check, limit currents, electrical resistance, safety tubes and currents, diodes, found that the fuses had melted, thus determining that there might be short circuit failure. Online measurements of current filters, capacitation, no charge response, no response to typographical tests, and a pointer indicating electrical resistance around 100k。
Welding of filtered caps, measuring in table 1k, no charger response, resistance load 30k, reverse measurement, still 30k resistance, no charger response, and careful observation of the extreme leak in the cap. Remeasure the input power input end, the resistance is around 1 mega euro, and the input resistance is normal。
It is suggested that the power failure should be caused by a leak in the filtering capacity. Since there is no 400v10u filtering capacitor on hand and there is an empty filtered capacitor on the circuit board, access circuits are used in combination with 400v3. 9u and 400v6. 8u. Welding of the safety tube, measuring the power input end in table 1k, with electrical resistance at 1 mega euro, indicates that the circuits have returned to normal。
The secondary power output diode was measured and there were no signs of damage. Switch to the power, signal light on. Airborne measure output voltage, 13v, in normal range. The 20-time slide transformer was connected to the circuit, the resistance was adjusted and the current was maintained at 2a for 30 minutes without failure. The circuit board is loaded into the outer shell, which continues to be electrified for 30 minutes and the outer shell is hot。
As the adaptor is used for surveillance equipment for 24 hours x 365 days, it is estimated that the power adaptor is chronically operating with thermal dissipation of the power source resulting in overheating. For insurance purposes, 30 small holes were drilled with a 1mm drill on one side of the low-pressure part of the fittings to facilitate heat dispersion. So far, the repairs have been completed。
The above is a detailed sharing of information on the maintenance of the 12v power adaptor and the frequent failure of the 12v power adaptor. I hope our sharing will help you. It was also to be hoped that, when using the 12v power adapter, attention would be paid to the fact that, if used inappropriately, explosions would occur. So you have to pay attention. In addition to this, when you find that the 12v power adaptor is not working, you need to find the 12v power adaptor malfunctions based on what we have shared above, and to repair them based on the corresponding failure。
