Read Sharp R-23AM (serv.man3) Service Manual online
5
R - 2 2 A T
R-23AM
R - 2 4 A T
R-23AM
R - 2 4 A T
power, the line voltage is supplied to the high voltage
transformers T1+T2 intermittently within a 48 second time
base through the contacts of the relays RY3+RY4.
The following levels of microwaves power are given.
transformers T1+T2 intermittently within a 48 second time
base through the contacts of the relays RY3+RY4.
The following levels of microwaves power are given.
NOTE: The ON/OFF time ratio does not exactly corre-
spond to the percentage of microwave power,
because approx. 3 seconds are needed for heat-
ing up the magnetron filament.
because approx. 3 seconds are needed for heat-
ing up the magnetron filament.
MICROWAVE VARIABLE COOKING (for R-23AM)
When the microwave oven is preset for variable cooking
power, the line voltage is supplied to the high voltage
transformers intermittently within a 48 second time base
through the contacts of the relays RY2+RY3.
The following levels of microwaves power are given.
power, the line voltage is supplied to the high voltage
transformers intermittently within a 48 second time base
through the contacts of the relays RY2+RY3.
The following levels of microwaves power are given.
NOTE: The ON/OFF time ratio does not exactly corre-
spond to the percentage of microwave power,
because approx. 3 seconds are needed for heat-
ing up the magnetron filament.
because approx. 3 seconds are needed for heat-
ing up the magnetron filament.
48 sec. ON
Number key
44sec. ON
Number key 9
40 sec. ON
Number key 8
36 sec. ON
Number key 7
32 sec. ON
Number key 6
26 sec. ON
Number key 5
22 sec. ON
Number key 4
16 sec. ON
Number key 3
12 sec. ON
Number key 2
8 sec. ON
Number key 1
0 sec. ON
Number key 0
48 sec. ON
100%
26sec. ON
50%
12 sec. ON
20%
8 sec. ON
10%
T1: HIGH VOLTAGE
TRANSFORMER
TRANSFORMER
H. V. RECTIFIER
C1: H.V. CAPACITOR
MG1: MAGNETRON (UPPER)
(REAR)
H. V. RECTIFIER
H. V. FUSE
H. V. FUSE
C2: H.V. CAPACITOR
MG2: MAGNETRON (LOWER)
T2: HIGH VOLTAGE
TRANSFORMER
TRANSFORMER
(FRONT)
COMMERCIAL
FREQUENCY
(50HZ)
FREQUENCY
(50HZ)
POWER OUTPUT
BY MAGNETRON T1
BY MAGNETRON T1
POWER OUTPUT
BY MAGNETRON T2
BY MAGNETRON T2
OPERATION OF
MAGNETRON
MAGNETRON
TWO MAGNETRON OPERATION SYSTEM
Two magnetrons MG1+MG2 are equipped in order to get
higher microwave power output. The primary windings of
the high voltage transformers T1+T2 are connected so
that each magnetron can be oscillated alternatively ac-
cording to the frequency of the power supply. Refer to the
Figure B-1 and B-2.
higher microwave power output. The primary windings of
the high voltage transformers T1+T2 are connected so
that each magnetron can be oscillated alternatively ac-
cording to the frequency of the power supply. Refer to the
Figure B-1 and B-2.
Figure B-1. High Voltage Circuit
Figure B-2. Operation of Magnetron
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