Publish Time: 2022-08-19 Origin: Site
The Touch Switch is a new product that is a result of technological advancement. The Touch Switch is a wall switch designed using the touch-sensitive chip principle and is a replacement for the traditional mechanical wall switch. The following is a small introduction to the causes of Touch Switch failure and failure repair tips. Here are some answers.
Here is the content list:
Touch Switch failure causes.
Touch Switch malfunction repair tips.
First, start looking for Touch Switch failure causes, generally have the following situation: First, the light long light: light long light clarifies that the main circuit of the switch is in a state of conduction, short-circuiting the ce foot of VT1, if also light, the problem in VS breakdown and diode VD1 ~ VD4 there is a short circuit. On the contrary, it is a problem of the control circuit, the possible reasons are VT2's ce pole breakdown, capacitor C1 short circuit or leakage, resistor R3 open circuit, so that VT1 can not constitute the base current, can be recognized soon after measuring the base potential of VT1, if the base potential is normal, then VT1 is damaged. Second, the light does not light up: according to the schematic diagram, you can use the short-circuit method to find out pole by pole. In the first short-circuit switch input, the light does not light up to clarify the problem in the circuit outside the switch, such as bulb damage, poor wiring, etc., and vice versa for the circuit has problems. Third, the light brightness is not normal: the light is long, but the brightness is not, can be controlled by the contact piece, clarify VD1 ~ VD4 there is a diode breakdown. If the light can be controlled by the contact piece, but the brightness is not, it is clarified that there is a diode open circuit. It can be quickly determined which diode is damaged by direct measurement of the online resistance.
There are several reasons why the Touch Switch may not work. The contacts may be poorly contacted, which can be repaired by disconnecting the power supply and wiping the contacts clean. It can also be caused by a burnt circuit board, which needs to be replaced. It is recommended to contact a professional to do this; it can be caused by a stuck switch.
If the Touch Switch does not light up when touched by hand, the reason for the switch malfunctioning is that the touch circuit is broken or the circuit is damaged, or the light bulb is damaged and does not light up, try replacing the light first to distinguish whether the light bulb is damaged or the light is damaged. The Touch Switch is a relatively advanced switch, which can be turned on or off by using a human body part, such as a finger or arm, to approach the capacitance generated by the switch, and the chip will transmit instructions to control the switch computer.
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