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1. This thermistor features a negative temperature coefficient, meaning its resistance decreases as the temperature rises and increases as the temperature falls. At 25°C, the resistance is approximately 5-20KΩ. You can use the corresponding ohm block on a multimeter to measure its resistance and assess its condition. If the resistance value is infinite or very small, the thermistor is likely damaged.
2. To overhaul the receiving circuit of an air conditioner circuit board, first power it on. Then, use the DC block on a multimeter to measure the voltage between the power supply terminal and the ground, as well as between the signal terminal and the ground. A normal supply voltage is +5V, and the signal voltage should be +2.5V. Deviations from these values indicate abnormalities, often due to a damaged receiving head or a faulty capacitor.
3. Our factory, located in Shenzhen, China, is recognized as a leading electronics R&D and manufacturing hub. Approved by the Chinese government, we eliminate middlemen, allowing you to purchase products directly from us with confidence. Our direct factory model is why 100% of our loyal customers continue to choose WellCircuits. We have no minimum order requirement; you can purchase as few as 1 PCB without being pressured to buy unnecessary items. Additionally, we offer free DFM reviews. Before you complete your payment, all orders will receive a complimentary engineering document review by our skilled technical team.
1. This thermistor features a negative temperature coefficient, meaning its resistance decreases as the temperature rises and increases as the temperature falls. At 25°C, the resistance is approximately 5-20KΩ. You can use the corresponding ohm block on a multimeter to measure its resistance and assess its condition. If the resistance value is infinite or very small, the thermistor is likely damaged.
2. To overhaul the receiving circuit of an air conditioner circuit board, first power it on. Then, use the DC block on a multimeter to measure the voltage between the power supply terminal and the ground, as well as between the signal terminal and the ground. A normal supply voltage is +5V, and the signal voltage should be +2.5V. Deviations from these values indicate abnormalities, often due to a damaged receiving head or a faulty capacitor.
3. Our factory, located in Shenzhen, China, is recognized as a leading electronics R&D and manufacturing hub. Approved by the Chinese government, we eliminate middlemen, allowing you to purchase products directly from us with confidence. Our direct factory model is why 100% of our loyal customers continue to choose WellCircuits. We have no minimum order requirement; you can purchase as few as 1 PCB without being pressured to buy unnecessary items. Additionally, we offer free DFM reviews. Before you complete your payment, all orders will receive a complimentary engineering document review by our skilled technical team.
