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Model
R-291KM
Pages
35
Size
2.28 MB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven
File
r-291km.pdf
Date
PREV: Sharp R-28STM (serv.man2) User Manual / Operation Manual

Sharp R-291KM Service Manual ▷ View online

R-291(K)M
12 – 1
R218L(W)
CHAPTER 12. 
CIRCUIT DIAGRAMS
[1] Oven Schematic
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR OPENED AND CLOSED.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
                                                                                                      Figure O-1 Oven Schematic-OFF Condition
                                                                                                   
Figure O-2 Oven Schematic-ON Condition
A3
A1
B3
B5
OL
FM
TTM
RELAY
CN-C
HUMIDITY
SENSOR
MICRO
TEMP.
FUSE
FUSE
HOLDER ASSY
FUSE 6.3A
SECONDARY INTERLOCK SWITCH
CONTROL
UNIT
MICRO
RELAY
H.V. CAPACITOR
IN2
IN1
F
M 
N
A
O
T
R
O
O
P
M
AL 
NE
V
NR
UT
T
M E
LB
A
O
T
R
O
DOOR SENSING
 
N.O
COM
.
H
V
REI
FI
TC
ER .
I
N
O
M
T
WS 
R
O
H.V. TRANSFORMER
M
A
TE
N
G
R
N
O
FM
OL
TTM
L
N
N
OI
T
CE
N
N
OC 
DR
OC 
CA
N
W
OR
B : 
NR
B
E
UL
B :  
UL
B
UL
N
B
RB
B1
N.C
SWITCH
 *
             *SEE NOTE 3
*RATE VOLTAGE SEE NOTE 4
A3
A1
B3
B5
OL
FM
TTM
RELAY
CN-C
HUMIDITY
SENSOR
MICRO
TEMP.
FUSE
FUSE
HOLDER ASSY
FUSE 6.3A
SECONDARY INTERLOCK SWITCH
CONTROL
UNIT
MICRO
RELAY
H.V. CAPACITOR
IN2
IN1
F
M 
N
A
O
T
R
O
O
P
M
AL 
NE
V
NR
UT
T
M E
LB
A
O
T
R
O
DOOR SENSING
 
N.O
COM
.
H
V
REI
FI
TC
ER .
I
N
O
M
T
WS 
R
O
H.V. TRANSFORMER
M
A
TE
N
G
R
N
O
FM
OL
TTM
L
N
N
OI
T
CE
N
N
OC 
DR
OC 
CA
N
W
OR
B : 
NR
B
E
UL
B :  
UL
B
UL
N
B
RB
B1
N.C
SWITCH
 *
             *SEE NOTE 3
*RATE VOLTAGE SEE NOTE 4
R-291(K)M
12 – 2
[2] Pictorial Diagram (Figure S-1)
Figure S-1 Pictorial Diagram
YLW
MONITOR SWITCH
DOOR SENSING SWITCH
COM
COM
GRY
N.C.
N.O.
N.O.
COM
RED
RED
TEMPERATURE FUS
E
(OVEN)
SECONDARY INTERLOCK LATC
H
SWITCH
WHT
RED
WHT
COM
N.O.
BLK
HIGH VOLTAGE CAPACITOR
H.V
.RECTIFIER
HIG
H
VOLTAG
E
COMPONENTS
MAGNETRON
TURNTABLE MOTOR
HIG
H
VOLTAGE
TRANSFORMER
GRY
RED
ORG
WHT
BLK
GRY
FUSE
LINE
NEUTRAL
FA
N
MOTOR
BLK
BLU
ORG
OVEN LAMP
ORG
BRN
BLU
L
N
WHT
RED
Powe
rSupply
Cord
Ove
n
Cavity
Bac
k
Plate
Screw
FUS
E
HOLDER
ASSEMBLY
G / Y
GRY
HIG
H
VOLTAG
E
FUSE
GRY
GRY
BLU
RED
YLW
PNK
ORG
GRY
WHT
ORG
RY1
GRY
N.C.
PNK
ORG
BLK
RED
R-291(K)M
12 – 3
[3] Control unit circuit (Figure S-2)
Figure S-2 Control unit circuit
R-291(K)M
12 – 4
[4] Control unit circuit (Figure S-3)
Figure S-3 Control unit circuit
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