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Four maintenance methods of touch delay switch

Release time:2018-06-26    Clicks: Click

 
When I use the touch delay switch when the failure of the first do not worry, according to the method we introduce to the friends, to a simple operation can, how to do the specific operation? Let's give you a detailed introduction.
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Maintenance method of touch delay switch
1. touch delay switch - fuse problem
(1) when the electricity is opened, the fuse is suddenly burnt out, and the output voltage is zero at this time. It should be the switch tube being knocked out, the emitter and the collector short circuit.
(2) use the tool to remove the switch tube first and use the universal meter to check the ground resistance of the emitter and collector. If it is zero or very small, it needs to replace a new one, and then the new fuse is replaced by the OK.
2. touch delay switch grating problem
(1) if the grating has a "S" shape distortion, first do not be surprised, this problem is more common, should be the filter circuit and voltage regulator, if the diode circuit breakage, full wave rectification to half wave rectification, the capacity of the filter capacitance may be reduced.
(2) to look for the problem in this direction first, if the diode problem, to replace a new, the same signal diode, start running, generally no problem.
3. touch delay switch - circuit short circuit problem
(1) if used. It is found that the AC 220V rectifier filter circuit suddenly appears short-circuit fault, and when it starts, the insurance is broken.
(2) first check whether the rectifier diode is short circuited, the filter capacitor has leakage of electricity, the demagnetization coil plug, check the demagnetization thermistor is short circuited, basically these problems, it is eliminated one by one, according to the situation, the corresponding repair and replacement parts.
4. touch delay switch - no grating problem
(1) when the machine is opened, there is no grating, no display, the power indicator light is not bright. When the fuse is checked, it is found that it is not burned, this time it is strange.
(2) check whether the AC transformer is open, confirm the current limiting resistance of the rectifier circuit, whether there is open circuit or whether the diode is broken, use the universal meter to check, if there is abnormal, good maintenance in time.
From the touch delay switch, four kinds of maintenance methods of touch delay switch have been analyzed. The maintenance process of touch delay switch is very simple. It usually needs universal meter test. If abnormal, the reason can be found. In the touch delay switch repair, we often encounter resistance, parts damage, please replace the same model, do not make a mistake, otherwise it will affect the later use.
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