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THEORY OF OPERATION
E-4 E-4
POWER WAVE 450
SWITCH BOARDS
There are four Switch Boards in the Power Wave, each
containing an input capacitor. The capacitors on
Switch Boards #1 and #2 are always in parallel, and
the capacitors on Switch Boards #3 and #4 are always
in parallel. When the filter capacitors are fully charged,
they act as power supplies for the Switch Boards. The
Switch Boards contain the Field Effect Transistors
(FETs) which, when switched on, supply the Main
Transformer primary windings with DC current flow.
See FET operation discussion and diagrams (Figures
E.10 and E11).
FIGURE E.4 – SWITCH BOARD CIRCUIT
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
AUX.
