If you need to measure the quality of the LED constant current power supply chip, you can follow the following steps:
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1. Use the resistance (ohm) of the multimeter to test. Connect the two multimeter probes to the positive and negative terminals of the output terminal of the power chip respectively, and observe whether the reading of the multimeter is within the normal range.
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2. Use the voltage (DC voltage) of the multimeter to test. Connect the two multimeter probes to the positive and negative terminals of the input terminal of the power chip respectively, and observe whether the reading of the multimeter is within the normal range.
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3. Use oscilloscope test to observe whether the waveform of the output end of the power chip is normal, and observe whether the threshold voltage is normal during operation.
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4. If the above tests can not confirm whether the power chip is normal, you can use alternative parts to test, replace the power chip with the same brand, model and parameter, and observe whether the problem can be solved.
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It should be noted that if you do not have the relevant technical knowledge or professional measurement equipment, please do not disassemble or dispose of the circuit board by yourself, so as not to bring you security risks or other losses. If necessary, please consult professional technicians or service providers.
To use a multimeter to determine the quality of BP3122LED constant current driver chip, you can follow the following steps:
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1. Connect the multimeter to the test point. Connect the red test pin to the positive terminal of the measuring point and the black test pin to the negative terminal.
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2. Power on the chip to make it work properly.
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3. Use a multimeter to test the output voltage and current of the chip. According to the BP3122LED specification, the range of test voltage and current values can be determined.
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4. Observe the test results. If the test results do not match the specifications, it means that the chip may have a problem and needs to be replaced.
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It should be noted that the test point needs to be carefully handled during testing and the correct testing method is followed. If you do not have experience, it is best to ask an experienced technician or electronic engineer to perform the test.
First determine whether the positive and negative wiring is correct, and then use a multimeter to hit the DC 200v gear to test whether the drive is about 30 v voltage, there is a good drive lamp to be replaced, and on the contrary, no voltage drive is bad to be replaced