Service manual

7
R-22GV
R-22GT
R-23GT
R-24GT
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 O-1. R-23GT/24GT Oven SChematic-OFF Condition (208 VCondition)
Figure O-1. R-22GV/GT Oven SChematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED OR 1 MINUTE AFTER COOK OFF
2. " . " APPEARS ON DISPLAY
COMMERCIAL
FREQUENCY
(60HZ)
POWER OUTPUT
BY MAGNETRON 1
POWER OUTPUT
BY MAGNETRON 2
OPERATION OF
MAGNETRON
Figure B-1. Operation of Magnetron
FUSE 20A
OVEN LAMP
BLOWER MOTOR
120V 60Hz
MAGNETRON (1) (UPPER)
BM
STIRRER MOTOR STIRRER MOTOR
SM SM
OL
H3
H1
MAGNETRON THERMISTOR
INTAKE  THERMISTOR
BLK

WHT
GRY
GRY
DOOR SENSING
SWITCH
A1 A3 B2 B1
A7
RY2 RY3
OVEN 
THERMAL
CUT-OUT
BLOWER
MOTOR 
THERMAL
CUT-OUT
SECONDARY
INTERLOCK
SWITCH (1)
MAGNETRON
THERMAL
CUT-OUT (1)
(UPPER)
PRIMARY
INTERLOCK
RELAY (2)
B3
OVEN THERMISTOR
D1D3
TAB2 TAB1
PRIMARY
INTERLOCK
RELAY (1)
MAGNETRON
THERMAL
CUT-OUT (2)
(LOWER)
YLW
BLK
MONITOR SWITCH (1) MONITOR SWITCH (2)
WHT/GRY GRY
YLW BLK
POWER
TRANSFORMER (1) 
(FRONT)
CAPACITOR (1)
0.75µF
CAPACITOR (2)
0.75µF
POWER
TRANSFORMER (2) 
(REAR)
RECTIFIER (1) 
RECTIFIER (2) 
BLK
ORG
MAGNETRON (2) (LOWER)
GRN
RY1
SECONDARY
INTERLOCK
SWITCH (2)
FUSE 20A
OVEN LAMP
BLOWER MOTOR
208/230V 60Hz
MAGNETRON (1) (UPPER)
BM
STIRRER MOTOR
SM SM
OL
H3
H1
MAGNETRON THERMISTOR
INTAKE  THERMISTOR
BLKWHT
DOOR SENSING
SWITCH
A1 A3 B2 B1
A7
RY2 RY3
OVEN 
THERMAL
CUT-OUT
BLOWER
MOTOR 
THERMAL
CUT-OUT
MAGNETRON
THERMAL
CUT-OUT (1)
(UPPER)
PRIMARY
INTERLOCK
RELAY (2)
B3
OVEN THERMISTOR
D1D3
TAB2 TAB1
PRIMARY
INTERLOCK
RELAY (1)
MAGNETRON
THERMAL
CUT-OUT (2)
(LOWER)
RED
PNK
MONITOR SWITCH (2) MONITOR SWITCH (1)
GRY
WHT
PNK RED
POWER
TRANSFORMER (1) 
(FRONT)
CAPACITOR (1)
0.94µF
CAPACITOR (2)
0.94µF
POWER
TRANSFORMER (2) 
(REAR)
RECTIFIER (1) 
RECTIFIER (2) 
MAGNETRON (2) (LOWER)
RY1
A5
WHT/GRY
OL
VOLTAGE SELECT SWITCH (V.S.SW) (2)
COM
NC
COM
NC
V.S.SW (1)
COM
NC
NC
COM
V.S.SW (4)
V.S.SW (3)
SECONDARY
INTERLOCK
SWITCH (1)
SECONDARY
INTERLOCK
SWITCH (2)
BLK RED