The LED tester is a device that provides power to LED lights in TV screens. It includes an isolating switch power supply, a constant-current circuit, a current control circuit, and an LED digital voltage display system. The device has a voltage output of 0-300V DC and a current output of 0.15mA (starting current) to 0-30mA. It can handle a voltage input of 85V-245V AC 50/60HZ, with a power input of less than 20VA. The device operates within a temperature range of 20-40C.
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