Sharp R-1870 Service Manual Supplement page 9

SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
FUSE
MAGNETRON
20A
TEMPERATURE FUSE
BLK
BLK
BLK
BLK
C3
HOOD FAN
THERMAL
C9
CUT OUT
RY9
BRN
NOISE
C5
RESISTOR
RY10
GRN
BLU
C7
PPL HOOD
120 V AC. GND
CAPACITOR
60 Hz
HOOD
A1 A3 C1
MOTOR
HL HL
HOOD
LAMP
RED
YLW
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. START PAD TOUCHED.
FUSE
MAGNETRON
20A
TEMPERATURE FUSE
BLK
BLK
BLK
BLK
C3
HOOD FAN
THERMAL
C9
CUT OUT
RY9
BRN
NOISE
C5
RESISTOR
RY10
GRN
BLU
C7
PPL HOOD
120 V AC.
GND
CAPACITOR
60 Hz
HOOD
A1 A3 C1
MOTOR
HL HL
HOOD
LAMP
RED
YLW
CONTROL UNIT
RY6 RY5 RY4 RY7
RY8
A5 B5 B3 B1 B7
DM
TTM
FM
CM
WHT
WHT
GRY
SECONDARY
INTERLOCK
SWITCH
Figure O-1. Oven Schematic - Off Condition
CONTROL UNIT
RY6 RY5 RY4 RY7
RY8
A5 B5 B3 B1 B7
DM
TTM
FM
CM
WHT
WHT
GRY
SECONDARY
INTERLOCK
SWITCH
Figure O-2. Oven Schematic - Microwave Cooking Condition
COM.
N.O.
RY1 RY2
RY1
F1
COM. COM.
N.O. N.O.
E2 E5
RY2 RY3
RY1 RY3
E1
DOOR
THERMISTOR
SENSING
SWITCH
OL
COM.
N.O.
RY1
RY2
RY1
F1
COM. COM.
N.O. N.O.
E2
E5
RY2 RY3
RY1 RY3
E1
DOOR
THERMISTOR
SENSING
SWITCH
OL
7
AH SENSOR
POWER
TRANSFORMER
F2 F3
E6
E3
HIGH VOLTAGE
E4
STM
CAPACITOR
0.9 F
DAMPER
SWITCH
HIGH VOLTAGE
RECTIFIER
AH SENSOR
POWER
TRANSFORMER
F2 F3
E6
E3
HIGH VOLTAGE
E4
STM
CAPACITOR
0.9 F
DAMPER
SWITCH
HIGH VOLTAGE
RECTIFIER
R - 1 8 7 0
R - 1 8 7 1