Sharp R-297 Service Manual ▷ View online
R-297ST
23
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. START KEY TOUCHED.
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. START KEY TOUCHED.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
NOTE: " " indicates components with potential above 250V.
Figure O-1 Oven Schematic-OFF Condition
Figure O-2 Oven Schematic-ON Condition
HIGH VOLTAGE
TRANSFORMER
WITH THERMAL
CUT-OUT 150
ß
C
MAGNETRON
H.V. RECTIFIER
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
MONITOR SWITCH
CONTROL
UNIT
UNIT
1ST. LATCH
SWITCH
SWITCH
2ND. INTERLOCK
RELAY CONTROL
SWITCH
RELAY CONTROL
SWITCH
B1
B2
A3
OL
FM
TTM
COM.
RY-1
RY-1: SURGE RELAY
SURGE RELAY UNIT
D1
C1
+
R1 - R4
ZD1 - ZD2
RS: SURGE
RESISTOR
N.O.
A1
RY-2:
2ND.
INTERLOCK
RELAY
2ND.
INTERLOCK
RELAY
H.V. FUSE
0.6A
CAPACITOR
0.91
F
AC2100V
TEMPERATURE
FUSE
120
ß
C (OVEN)
EARTH
230 - 240V
50Hz
BLU
BRN
LIVE
NEUTRAL
G-Y
FUSE
T6.3A
N
N
L
L
LINE CROSS CAPACITOR
0.068
/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS
CAPACITOR
0.0022
/AC250V
LINE BYPASS
CAPACITOR
0.0022
/AC250V
NOISE FILTER
HVT
HIGH VOLTAGE
TRANSFORMER
WITH THERMAL
CUT-OUT 150
ß
C
MAGNETRON
H.V. RECTIFIER
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
MONITOR SWITCH
CONTROL
UNIT
UNIT
1ST. LATCH
SWITCH
SWITCH
2ND. INTERLOCK
RELAY CONTROL
SWITCH
RELAY CONTROL
SWITCH
B1
B2
OL
FM
TTM
COM.
RY-1
D1
C1
+
R1 - R4
ZD1 - ZD2
RS: SURGE
RESISTOR
N.O.
A1
RY-2:
2ND.
INTERLOCK
RELAY
2ND.
INTERLOCK
RELAY
H.V. FUSE
0.6A
CAPACITOR
0.91
F
AC2100V
TEMPERATURE
FUSE
120
ß
C (OVEN)
EARTH
230 - 240V
50Hz
BLU
BRN
LIVE
NEUTRAL
G-Y
FUSE
T6.3A
N
L
L
LINE CROSS CAPACITOR
0.068
/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS
CAPACITOR
0.0022
/AC250V
LINE BYPASS
CAPACITOR
0.0022
/AC250V
NOISE FILTER
HVT
A3
RY-1: SURGE RELAY
SURGE RELAY UNIT
N
R-297ST
24
1
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
2
3
4
5
6
1
2
3
4
5
6
Figure S-1. Pictorial Diagram
WHT
RED
HIGH VOLTAGE COMPONENTS
MAGNETRON
HIGH
VOLTAGE
CAPACITOR
H.V.
RECTIFIER
MONITOR
SWITCH
TURNTABLE
MOTOR
FAN MOTOR
ORG
ORG
1ST. LATCH
SWITCH
COM.
COM.
ORG
GRY
WHT
N
RED
WHT
L
GRY
GRY
WHT
ORG
N.C.
N.O.
GRY
GRY
GRY
(Cabinet side)
(Front side)
RED
RED
2ND. INTERLOCK
RELAY CONTROL
SWITCH
RED
POWER
TRANSFORMER
HIGH VOLTAGE
FUSE
G/Y
B
L
U
B
R
N
EARTH
LIVE
NEUTRAL
POWER SUPPLY CORD
NOISE
FILTER
OVEN CAVITY
BACK PLATE
GRN
ORG
RED
WHT
GRY
GRY
RED
RED
ORG
CN-A
CN-B
2
GRY
1
3
ORG
GRY
GRN
2
1
COM.
ORG
BLK
BLK
N.O.
OVEN LAMP
TEMPERATURE
FUSE (OVEN)
RED
GRN
GRN
CONTROL UNIT
SYRGE
RELAY
UNIT
RY1
2ND.
INTERLOCK
RELAY
CN-B
2
1
CN-A
RS
HVT
ACL
ACN
N.O.
COM.
T1
3
1
RY2
WHT
WHT
R-297ST
25
Figure S-2. Control Unit Circuit
1
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
2
3
4
5
6
1
2
3
4
5
6
SEG14
AIN1
AIN0
SEG0
P20
VLC2
VLC1
VLC0
CAPL
CAPH
P70
AIN5
P03
COM0
AIN2
AIN3
AIN4
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
P11
P10
P33
P32
P31
INTP0
P26
P25
AVSS
P24
P23
P22
BZO90
1
48
32
49
64
16
33
B2
COM
NO
A1
RY2
DU12D1-1P(M)-R
D20
D21
Q21
DTD143ES
C21
10uF/35V
+
-
D22
D40
SP1
C2
470uF/25V
+
-
0.1uF/25V
+
-
C8
220uF/10V
ZD1
HZ4B3
C10
0.1uF/25V
R5
R6
15K
C4
0.01uF/25V
R10
15K
C11
0.01uF/25V
1K
C1
Q20
DTA143EKA
C20
R41
15K
R40
4.7K
MICRO
VRS1
T1
D1
D2
D3
D4
SEG1
SEG3
SEG2
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG11
SEG12
COM2
COM1
COM0
B1
DOOR
RST
-5V
INT
BZ
COM
M
C40
GND
R4
910
1/2W
CN-B
AC(H)
AC(N)
ab
d
c
G4
G5
G6
G1
(J1)
G8
G9
G10
G2
G3
G7
VR
R30
3.3K
0.01uF
25V
PA114DR
COM1
COM2
COM3
COM2
COM3
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG2
SEG3
SEG4
SEG5
SEG6
P71
P72
AVDD
P01
P00
RESET
X2
X1
VSS
VDD
XT2
XT1
IC
P53
P52
P51
P50
P02
17
R75
R76
R7
R8
R9
C3
R77
R78
C60
C61
C62
C63
4.7K
4.7K
4.7K
R81
11KF
(J12)
(J11)
(J10)
(J13)
(J15)
(J14)
Q30
P41
P42
P40
A3
10sec
1min.
10min.
C60-C63
330P/50V x 4
< LSI UNIT >
Express
COOK
< KEY UNIT >
START
AUTO
MINUTE
Express
DEFROST
STOP
CLEAR
POWER
WEIGHT
R75-R78
220K x 4
0.1uF
25V
C80
22pF/50V
IC-1
Q1
2SA1037AK
Q10
DTA143EKA
DTA143EKA
0.1uF
25V
Q22
DTA123JS
< POWER UNIT >
[NOTE]
:IF NOT SPECIFIED 1/16W –5%
:IF NOT SPECIFIED 1SS270A
RY1
FTR-F3AA012E
or
G5N-1A VDC12
D1 - D4 1N4002
X
4
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
2ND.
INTERLOCK
RELAY
CONTROL
SWITCH
LIQUID CRYSTAL DISPLAY
COOK DEF
KG
QTY
CHECK
AC230 - 240V
50HZ
R-297ST
26
PARTS LIST
*
*
*
*
*
*
*
*
*
*
*
*
Note: The parts marked " " may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V.
REF. NO.
PART NO.
DESCRIPTION
Q'TY
CODE
1
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
2
3
4
5
6
1
2
3
4
5
6
Figure S-3. Printed Wiring Board
DIP
CN-B
C21
T1
S
D2
P
(J1)
1
C8
2
5
E
Q22
B
21
SP1
Q21
(J12)
(J13)
(J14)
(J15)
E
C2
R4
3
4
ZD1
D3
D4
D1
VRS1
RY2
RY1
CN-A
1
3
(J11)
(J10)
D20
D21
D40
D22
D22
CHIP
SIDE
SIDE
UNIT
CODE
CODE
ELECTRIC PARTS
1- 1
QACC-A126WRZZ
Power supply cord
1
AT
1- 1
QACC-A088WRE0
Power supply cord (Interchangeable)
1
AW
1- 2
FPWBFA347WRKZ
Noise filter
1
AX
1- 3
FH-DZA102WRKZ
High voltage rectifier assy
1
AN
1- 3
FH-DZA106WRKZ
High voltage rectifier assy (Interchangeable)
1
AQ
1- 3
FH-DZA088WRK0
High voltage rectifier assy (Interchangeable)
1
AP
1- 4
RC-QZA295WRZZ
High voltage capacitor
1
AV
1- 4
RC-QZA218WRE0
High voltage capacitor (Interchangeable)
for production use
1
--
1- 5
QFS-CA027WRZZ
Fuse T6.3A
1
AG
1- 6
QFS-IA004WRE0
High voltage fuse 0.6A
1
AK
1- 7
RMOTEA403WRZZ
Fan motor
1
AZ
1- 7
RMOTEA340WRE0
Fan motor (Interchangeable)
1
AX
1- 7
RMOTEA389WRE0
Fan motor (Interchangeable) for production use
1
--
1- 8
RV-MZA261WRE0
Magnetron
BF
1- 9
RLMPTA083WRZZ
Oven lamp
1
AM
1-10
QSW-MA137WRE0
1st. latch switch/ 2nd. interlock relay control switch
2
AH
1-11
QSW-MA138WRE0
Monitor switch
1
AH
1-12
RTRN-A706WRZZ
Power transformer
1
BH
1-13
QFS-TA038WRE0
Temperature fuse 120C(Oven)
1
AK
1-14
RMOTDA253WRZZ
Turntable motor
1
AV
1-14
RMOTDA226WRE0
Turntable motor (Interchangeable)
1
AT
1-14
RMOTDA173WRE0
Turntable motor (Interchangeable)
1
AX
CABINET PARTS
2- 1
GCABUA864WRPZ
Outer case cabinet
1
BD
2- 2
GLEGPA074WRE0
Foot
2
AC
2- 3
PCUSUA605WRPZ
Cushion
1
AG
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