- 17 -
4-3. WARNING - High voltage circuit ( 4,000 volt )
* The half-wave voltage doubler circuit consists of the secondary winding of
the high voltage transformer, H.V. diode (rectifier), and H.V. capacitor. The
H.V. diode allows alternating current (AC) to flow in one direction only and
rectifies it to pulsating direct current (DC).
The H.V. capacitor is able to store energy on one half of the AC cycle and
release it on the other half cycle.
* During the first half cycle of operation, the secondary winding of the
transformer supplies 2000 Volts to the capacitor current flows through the
diode and returns to the transformer for a complete circuit. This half-cycle
of AC charges the capacitor to approximately 2000 Volts.
* During the second half cycle of operation, the current flows in the opposite
direction, again supplies 2000 Volts to the circuit.
* This permits the capacitor to discharge its 2000 Volts on top of the 2000
Volts generated by the secondary winding, creating an approximate total
voltage of negative 4000 Volts D.C.
The negative 4000 Volts DC causes the magnetron to conduct current
and, to oscillate at 2450 MHz.
The first half cycle and the second half cycle become one complete cycle,
repeated input power frequency times per second .
INPUT
SENONDARY
WINDING AT
2000V
MAGNETRON
+
-
-
INPUT
SENONDARY
WINDING AT
2000V
MAGNETRON
+
-
-
+
INPUT
MAGNETRON
+
-
+
INPUT
MAGNETRON
+
-
+
-
SECONDARY
WINDING AT
2000V
Содержание MA-2005ST
Страница 39: ...6 2 13552A 13213A 13581A 13720D 14970A 14026A 13536A 13352A DOOR PARTS ...
Страница 40: ...6 3 26638A 23572A 23550D 268711 24781M WTP018 WTT028 24510L 250201 24970A CONTROLLER PARTS ...
Страница 41: ...6 4 948503 340511 33052M 36549S 34036W 33390G 35889A WTP013 WTT020 WSZ185 33112U OVEN CAVITY PARTS ...
Страница 42: ...6 5 43501A 43500A 466001 WSZ085 466001 466003 LATCH BOARD PARTS ...
Страница 44: ...6 7 63302L 63303L 63303R 948501 63302R 56170D WSZ002 WTT021 WTT021 65006B 65006B BASE PLATE PARTS ...
Страница 45: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Страница 46: ...8 2 PRINTED CIRCUIT BOARD ...