Circuit Diagrams - Sharp R-990KS Service Manual

CHAPTER 12.
R990K(W)

CIRCUIT DIAGRAMS

[1] Oven Schematic
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
NOISE FILTER
OL
230-240V
50Hz
UPPER LATCH
SWITCH
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. START PAD TOUCHED.
NOISE FILTER
OL
230-240V
50Hz
UPPER LATCH
SWITCH
THERMAL CUT-OUT
145¡C (MAGNETRON)
OR
THERMAL CUT-OUT
TEMPERATURE
95¡C (FAN)
FUSE 150¡C
(MAGNETRON)
A1
CM
TTM
A-7
FM DM
A-9
CONTROL UNIT
E-1 E-2
STOP
THER-
SWITCH
MISTOR
THERMAL CUT-OUT
145¡C (MAGNETRON)
OR
THERMAL CUT-OUT
TEMPERATURE
95¡C (FAN)
FUSE 150¡C
(MAGNETRON)
A1
TTM CM
A-7
FM DM
A-9
CONTROL UNIT
E-1 E-2
STOP
THER-
SWITCH
MISTOR
Figure O-2. Oven Schematic-High or Easy Defrost or Reheat Sensor Cooking Condition
Service Manual
NOTE: " " indicates components with potentials above 250V
COM.
(RY1)
A3 A5
N.O.
(RY1)
COM.
(RY3)
RY2
COM.
(RY2)
RY3
N.O.
(RY2)
N.O.
(RY3)
F-3 F-2 F-1
E-3 E-4 E-5 E-6
DAMPER
AH SENSOR
SWITCH
Figure O-1 Oven Schematic-OFF Condition
COM.
(RY1)
A3 A5
N.O.
(RY1)
COM.
(RY3)
RY2
COM.
(RY2)
RY3
N.O.
(RY2)
N.O.
(RY3)
F-3 F-2 F-1
E-3 E-4 E-5 E-6
DAMPER
AH SENSOR
SWITCH
12 – 1
R990K(W)
POWER
TRANSFORMER
H.V.FUSE
0.75A
CAPACITOR
1.13μ
AC 2100V
POWER
TRANSFORMER
H.V.FUSE
0.75A
CAPACITOR
1.13μ
AC 2100V