Service manual

34
R-870B
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. START PAD TOUCHED.
Figure O-2 Oven Schematic-Microwave cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. : OR CLOCK APPEAR ON DISPLAY.
NOTE: Indicates components with potential above 250 V.
Figure O-1 Oven Schematic-OFF Condition
FM
TTM
OVEN LAMP
FAN MOTOR
CONVECTION

MOTOR
TURNTABLE  MOTOR
H.V. RECTIFIER
CONTROUNIT
T1 T2
COM. COM. COM.
N.O.
COM.
N.O. N.O.
N.O.
A1
LINE BYPASS CAPACITOR 0.0033µF/ 250V
LINE BYPASS CAPACITOR 0.0033µF/ 250V
RESISTOR 10M/ 0.5W
NOISE SUPPRESSION COIL
RESISTOR 680 k/ 0.5W
LINE CROSS CAPACITOR 0.22µ/250V
NOISE FILTER UNIT
2ND. INTERLOCK
RELAY CONTROL
SWITCH
THERMISTOR
BRNBLU
G-Y 
EARTH
LIVENEUTRAL
RY4
RY3
RY2 RY6 RY5
CM
RY1
CAPACITOR 1.07µF AC2200V
GRILL HEATER (TOP)
BOTTOM HEATER
MAGNETRON
HIGH VOLTAGE  TRANSFORMER
B2
D1 D3
B1 F1 F3 F2
A3 A5
1ST.
LATCH SWITCH
THERMAL CUT-OUT
(MG.)
THERMAL
CUT-OUT(OVEN)
MONITOR SWITCH
FUSE 15A
FUSE 
M10A
220 V
~
50Hz
MONITOR RESISTOR 0.8/ 20W
LN
OL
AH SENSOR
RY2: 2ND. INTERLOCK
 RELAY
H.V. FUSE 0.75A
FM
TTM
OVEN LAMP
FAN MOTOR
CONVECTION

MOTOR
TURNTABLE  MOTOR
CONTROUNIT
T1 T2
COM. COM. COM.
N.O.
COM.
N.O. N.O.
N.O.
A1
LINE BYPASS CAPACITOR 0.0033µF/ 250V
LINE BYPASS CAPACITOR 0.0033µF/ 250V
RESISTOR 10M/ 0.5W
NOISE SUPPRESSION COIL
RESISTOR 680 k/ 0.5W
LINE CROSS CAPACITOR 0.22µ/250V
NOISE FILTER UNIT
THERMISTOR
BRNBLU
G-Y 
EARTH
LIVENEUTRAL
RY4
RY3
RY2 RY6 RY5
CM
RY1
GRILL HEATER (TOP)
BOTTOM HEATER
HIGH VOLTAGE  TRANSFORMER
B2
D1 D3
B1 F1 F3 F2
A3 A5
1ST.
LATCH SWITCH
THERMAL CUT-OUT
(MG.)
THERMAL
CUT-OUT(OVEN)
MONITOR SWITCH
FUSE 15A
FUSE 
M10A
220 V
~
50Hz
MONITOR RESISTOR 0.8/ 20W
LN
OL
2ND. INTERLOCK
RELAY CONTROL
SWITCH
AH SENSOR
RY2: 2ND. INTERLOCK
 RELAY
H.V. RECTIFIER
CAPACITOR 1.07µF AC2200V
MAGNETRON
H.V. FUSE 0.75A