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THEORY OF OPERATION
FIGURE E.4 – SWITCH BOARD CIRCUIT
| INPUT | MAIN | OUTPUT |
|
| RECTIFIER |
| ||
| TRAMSFORMER | RECTIFIER |
| |
INPUT | AND | POSITIVE | ||
CONTACTOR | RECONNECT |
| CHOKE | |
|
| LEFT |
|
|
THREE |
| SWITCH |
|
|
| BOARD |
|
| |
PHASE |
|
|
| |
|
|
|
|
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INPUT |
| FET |
POWER |
| ASSEMBLY |
INPUT | AUX. | CT |
TRANS |
| |
LINE |
| |
SWITCH |
| RIGHT |
|
| |
|
| SWITCH |
PROTECTION | FAN | BOARD |
BOARD |
|
|
FET
ASSEMBLY
POWER
BOARD
CONTROL
BOARD
WATER
COOLERDISPLAY
BOARD
PC
INTERFACE
NEGATIVE
SHUNT
SNUBBER AND
SENSE LEADS
LCD
DISPLAY
KEYPAD
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OVERLAY
WF1 WF2
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).
NOTE: Unshaded areas of Block Logic Diagram are the subject of discussion.
