Plug in the test machine, the indicator light will be off and the sound and light will be absent. There is no response when the power is turned off again. It must be powered off after a few minutes and the indicator light is still on. Normal should be standby red light, turn on green light. The initial consideration is power protection. The cover is directly measured STB 5V, and the power is instantaneously reached 8V and then disappears. Obviously, the problem occurs in the sub-power supply 5V of the power supply board, and the voltage disappears after the voltage rises. It is over-voltage protection, usually in the optocoupler power supply and voltage-stabilized sampling part. Remove the four screws on the power board and open the board to see --- Hey! The glue sent me money again. The following is not described in the text, see the picture:
Respect the opinions of friends and change the type of glue into a wealthy glue.
A smoke camera is a kind of camera with the shape of a smoke detector, which is generally difficult to recognize, mainly for concealment. It is mostly used in more Ming-sensing places, in order not to arouse the disgust of the guests.
When the smoke concentration reaches a certain value, the weak current generated by the sensor is amplified by the amplifier and directly drives the camera or drives the camera through the action generated by the servo system, and shoots until it is burned out, so the recording equipment is best as far away from the collection site as possible.
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