First check if F1 and TH1 are good. If F1 is blown, check if the D-S pole of Q1 breaks down. Common TH1 desoldering, C2 failure and Q1 breakdown damage, L1 inter-turn fire will also cause repeated damage Q1 failure. For emergency maintenance, the wires 1 and 2, 3 and 4 of the L1 can be short-circuited directly. C2 can be replaced by 47μF ~ 82μF / 450V electrolytic capacitor, Q1 can be replaced by common N-channel field effect tube such as 6N60, 2SK2645.
If F1 is normal and T1 has no output, check whether R2, R3, and R4 are normal. A common cause is that R2, R3, and R4 are deteriorated or open. When repairing, replace R3 and R4 with the same value 1W cement resistor; replace R2 with 1W fuse resistor. If the above resistance is normal, first cut off the load to see if the output voltage returns to normal; if it returns to normal, check the load circuit further. If the voltage is still not normal, then directly test whether the 3 pin of CN1 is short-circuited to ground. Common conditions are leakage or breakdown of one of ZD3 and ZD4.
An electronic clock device with a wireless network monitoring camera is characterized in that it comprises an electronic clock device body with a wireless network monitoring camera; the electronic clock device body with a wireless network monitoring camera is composed of a foot, a wireless transmission module, a It consists of a rechargeable battery, a speaker, a touch display screen, a camera, a casing, an infrared device, and a microprocessor; the feet are fixedly installed at the bottom of the rechargeable battery; a casing is fixedly installed on the top of the rechargeable battery, and the The interior is provided with a touch screen, a camera, an infrared device and a microprocessor; the microprocessor is electrically connected to the rechargeable battery through wires; the wireless transmission module, speaker, display, camera and infrared device are connected to the micro processor through wires The display screen is arranged at the bottom of the camera, and the camera is surrounded by an infrared device; the wireless transmission module is fixedly installed on both sides of the rechargeable battery, and the speakers are opened on both sides of the casing
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