R-25JT-F
7
TWO MAGNETRON OPERATION SYSTEM
Two magnetrons (1), (2) are equipped in order to get higher
microwave power output. The primary windings of the power
transformers (1), (2) are connected so that each magnetron
can be oscillated alternatively according to the frequency of the
power supply. Refer to the Figure B-1.
Figure B-1. Operation of Magnetron
COMMERCIAL
FREQUENCY
(60HZ)
POWER OUTPUT
BY MAGNETRON 1
POWER OUTPUT
BY MAGNETRON 2
OPERATION OF
MAGNETRON
Figure O-1. Oven Schematic-OFF Condition (208 V Condition)
SCHEMATIC
NOTE: CONDITION OF OVEN
1.
DOOR CLOSED OR 1 MINUTE AFTER COOK OFF
2.
" . " APPEARS ON DISPLAY
OVEN LAMP
BLOWER MOTOR
208/230V 60Hz
MAGNETRON (1)
BM
STIRRER MOTOR
SM
SM
H3
H1
MAGNETRON THERMISTOR
BLK
WHT
DOOR SENSING
SWITCH
A1
A3
B2
B1
A7
RY2
TAB1
TAB2
RY3
OVEN
TEMP.
FUSE
B3
OVEN
THERMISTOR (1)
OVEN
THERMISTOR (2)
PRIMARY
INTERLOCK
RELAY (1)
PRIMARY
INTERLOCK
RELAY (2)
MONITOR SWITCH (2)
MONITOR SWITCH (1)
POWER
TRANSFORMER (1)
CAPACITOR (1)
0.94µF
CAPACITOR (2)
0.94µF
POWER
TRANSFORMER (2)
H.V. RECTIFIER (1)
H.V. RECTIFIER (2)
MAGNETRON (2)
RY1
A5
OL
COM
GRN
NC
V.S.
SW (1)
COM
NC
NC
COM
V.S.SW (3)
VOLTAGE SELECT
SWITCH (V.S.SW) (2)
SECONDARY INTERLOCK
SWITCHE(1)
SECONDARY INTERLOCK
SWITCHE(2)
OL
MAGNETRON
TEMP. FUSE (1)
MAGNETRON
TEMP. FUSE (2)
FUSE 20A
DISCHARGE RESISTOR 470K 1/2W
LINE CROSS CAPACITOR 1.0
F
AC250V
NOISE SUPPRESSION COIL
3300pF
3300pF
NOISE
FILTER