If a switching power supply is faulty, 90% of faults can be located by following the four steps of "Inspect - Test - Disconnect - Replace":   1. Inspect After powering off for 5 minutes, visually inspect the housing for bulging, burning, blown fuses, or capacitor leakage, taking photos for record.   2. Test Use a multimeter in the DC range to measure the main capacitor: 300 V ±10% at no load. Below 250 V indicates a defective rectifier bridge or filter. Measure the output: No load should be ±5% of the nominal value; short circuit should be 0 V, the fuse is intact, and the secondary rectifier is broken.   3. Disconnect Unplug the load and use a 30 W/12 V automotive light bulb as a dummy load: If the light bulb lights normally, the power supply is OK, and the problem lies with the load. If it does not light or flickers, proceed to the n...

  Cleaning equipment refers to mechanical devices used for cleaning floors, walls, ceilings, and other areas, such as sweepers, vacuum cleaners, floor scrubbers, high-pressure washers, etc. These devices typically require chargers to recharge their built-in batteries in order to ensure their normal operation. So, how can we maintain and care for the chargers of cleaning equipment? Here are some common methods:   1. Regularly inspect the appearance   Regularly check if the charger has any damage, cracks, deformations, etc. If any obvious damage to the casing is found, it should be immediately discontinued from use to prevent risks such as electric shock or fire.   2. Avoid excessive pulling   When using the charger, avoid excessive pulling of the power cord, especially the charging head. Excessive pulling may lead to wire breakage or poor internal connec...

  When dealing with the export of smart chargers as electronic products, a series of preparations need to be made. Here are some general considerations and preparations required:   1. Product Specifications and Features:Determine the specifications, functions, and features of your smart charger, including input voltage, output voltage, power, type of charging ports (such as USB-A, USB-C, etc.), compatibility, etc. Ensure your product meets the standards and demands of your target market.   2. Quality and Safety Certification:Ensure your product complies with the quality and safety certification standards of your target market, such as CE certification, FCC certification, etc. These certifications are basic requirements for entering international markets.   3. Market Research:Conduct market research to understand the demand, preferences, and...