SS-D2 red light medical instrument principle and maintenance circuit diagram

Published:2011/6/27 1:35:00 Author:Ecco | Keyword: red light , medical instrument , principle , maintenance | From:SeekIC

The instrument has two sets of rectifier circuit. One group is AC220V which is limited by R1, bridge rectified by D1 ~ D4, charged on C1 through R2, and when the voltage across C1 is more than turning voltage of two-way trigger diode ST, ST is conduction, so the T2 is first turned on. The coupling effect of winding B2 connected to C2, C5 in series will make T2 turn off, T1 turn on. This will enable the T1 and T2 alternately turn to build high-frequency oscillations.



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