Due to this voltage is maximum
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In a normal operation is power supply controlled by IC1. When transistors Q1 and
Q2 are closed, then Q3 and Q4 are opened. When we want to open one from power
transistors (Q1, Q2), then we have to close his exciting transistor (Q3, Q4).
Current goes via R46 and D14 and one winding T2. This current excite voltage on
base of power transistor and due to positive feedback transistor goes quickly to
saturation.
[noparse][[/noparse]Non-text portions of this message have been removed]
Q2 are closed, then Q3 and Q4 are opened. When we want to open one from power
transistors (Q1, Q2), then we have to close his exciting transistor (Q3, Q4).
Current goes via R46 and D14 and one winding T2. This current excite voltage on
base of power transistor and due to positive feedback transistor goes quickly to
saturation.
[noparse][[/noparse]Non-text portions of this message have been removed]