Sharp R-246 (serv.man2) Service Manual ▷ View online
R-246(G)
R-246(SL)
R-246(W)
R-246(SL)
R-246(W)
23
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
Figure O-2 Oven Schematic-ON Condition
Figure O-1 Oven Schematic-OFF Condition
NOTE: " " indicates components with potential above 250V.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
1. DOOR CLOSED.
HIGH VOLTAGE
TRANSFORMER
MAGNETRON
H.V. RECTIFIER
CAPACITOR
0.91
µ
F
AC2100V
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
MONITOR SWITCH
CONTROL
UNIT
THERMAL
CUT-OUT
125˚C (OVEN)
CUT-OUT
125˚C (OVEN)
2ND.
INTERLOCK
RELAY
INTERLOCK
RELAY
2ND. INTERLOCK
RELAY CONTROL
SWITCH
RELAY CONTROL
SWITCH
MONITOED LATCH
SWITCH
SWITCH
A3
OL
FM
TTM
THERMAL
CUT-OUT
95˚C (MG)
CUT-OUT
95˚C (MG)
N.O.
RY-1
COM.
A1
RY-2
EARTH
230 - 240V
˜
50Hz
BLU
BRN
LIVE
NEUTRAL
G-Y
FUSE
T6.3A
N
L
LINE CROSS CAPACITOR
0.068
µ
/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS
CAPACITOR
0.0022
µ
/AC250V
LINE BYPASS
CAPACITOR
0.0022
µ
/AC250V
NOISE FILTER
H.V. FUSE
0.6A
B1
B2
HIGH VOLTAGE
TRANSFORMER
MAGNETRON
H.V. RECTIFIER
CAPACITOR
0.91
µ
F
AC2100V
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP
MONITOR SWITCH
CONTROL
UNIT
THERMAL
CUT-OUT
125˚C (OVEN)
CUT-OUT
125˚C (OVEN)
2ND.
INTERLOCK
RELAY
INTERLOCK
RELAY
2ND. INTERLOCK
RELAY CONTROL
SWITCH
RELAY CONTROL
SWITCH
MONITOED LATCH
SWITCH
SWITCH
A3
OL
FM
TTM
THERMAL
CUT-OUT
95˚C (MG)
CUT-OUT
95˚C (MG)
N.O.
RY-1
COM.
A1
RY-2
EARTH
230 - 240V
˜
50Hz
BLU
BRN
LIVE
NEUTRAL
G-Y
FUSE
T6.3A
N
L
LINE CROSS CAPACITOR
0.068
µ
/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS
CAPACITOR
0.0022
µ
/AC250V
LINE BYPASS
CAPACITOR
0.0022
µ
/AC250V
NOISE FILTER
H.V. FUSE
0.6A
B1
B2
24
R-246(G)
R-246(SL)
R-246(W)
R-246(SL)
R-246(W)
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
WHT
HIGH VOLTAGE COMPONENTS
MAGNETRON
HIGH
VOLTAGE
CAPACITOR
H.V.
RECTIFIER
MONITOR
SWITCH
TURNTABLE
MOTOR
FAN MOTOR
QRG
ORG
MONITORED
LATCH
SWITCH
COM.
COM.
CN-B
WHT
N
RED
WHT
L
WHT
N.C.
N.O.
GRY
GRY
PNK
RED
2ND.
INTERLOCK
RELAY
CONTROL
SWITCH
BLK
PNK
HIGH VOLTAGE
TRANSFORMER
HIGH VOLTAGE
FUSE
G/Y
B
L
U
B
R
N
EARTH
LIVE
NEUTRAL
POWER SUPPLY CORD
NOISE
FILTER
OVEN CAVITY
BACK PLATE
WHT
GRN
WHT
WHT
WHT
WHT
RED
RED
RED
RED
RED
THERMAL CUT-OUT
(MG.)
THERMAL CUT-OUT
(OVEN)
WHT
CN-A
2
RED
1
3
BLK
ORG
GRY
GRN
2
1
N.O.
COM.
ORG
OVEN LAMP
CONTROL UNIT
GRN
GRN
SP1
RY1
CN-B
2
1
CN-A
3
1
RY2
GRY
WHT
WHT
R-246(G)
R-246(SL)
R-246(W)
R-246(SL)
R-246(W)
25
Figure S-2. Control Panel 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
+
–
+
–
+
–
A 3
A 1
NO
COM
G10
G 9
G 8
G 7
G 6
G 5
G 4
G 3
G 2
G 1
B 2
B 1
AC(N)
T1
POWER UNIT
ab
d
c
RY1
D1
D2
D3
R4
910 1/2w
R21 1k 1/4w
VR
R41 15k
NOTE
: IF NOT SPECIFIED, 1SS270A
: IF NOT SPECIFIED, 1/10W
±
5%
R70 15k
R71 15k
R72 15k
R73 15k
R40 4.7k
R78 220k
R77 220k
R76 220k
R67
15k
R66
15k
R65
15k
R64
15k
R63
15k
R62
15k
R75 220k
D22
D40
Q10 DTA143EKA
Q30 DTA143EKA
Q20
DTA143EKA
Q22
KRA105M
Q21
DTD143ES
Q1
2SA1037AK
Q23
2SA1267Y
D1-D4
11ES1
IC1
D4
VRS1 10G471K
C2 470
µ/25v
R30
3.3k 1/4w
C1 0.1
µ/50v
C10
0.1
µ
/50v
C20 0.1
µ
/25v
C8 47
µ/16v
C21 10
µ/35v
R10 15k
R50 20kF
R20 15k
R6 15k
R5
1k
HZ4C3
ZD1
HZ12A3L
ZD2
C3 0.01
µ/25v
C40 0.01
µ/25v
C5 0.1
µ
/25v
C6
0.1
µ
/25v
C7 0.1
µ
/25v
C4
S12
SEG19
VC3
B Z
R00
R01
R02
R03
P20
P21
P22
P23
K00
K01
K02
K03
COM0
COM1
VC2
VC1
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
S11
S10
S 9
S 8
S 7
S 6
S 5
S 4
S 3
S 2
S 1
C 1
C 2
C 3
0.01
µ
/25v
C11 0.01
µ/25v
SP1
PKM22EPT
D20
(J1)
(J2)
D21
RY2
AC230-240V
50Hz
OVEN LAMP
TURNTABLE
MOTOR
FAN MOTOR
2ND.
INTERLOCK
RELAY
CONTROL
SWITCH
MICRO
AC(H)
GND
(J10)
(J15) 4.7k
(J11) 4.7k
(J13) 4.7k
15
29
30
44
45
54
1
14
(J12)
(J14)
RESET
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM3
COM2
TEST
VSS
OCS3
OCS4
VD1
VDD
AVDD
AVREF
AVSS
P40
P41
P42
P43
Express
COOK
10 sec
1 min
10 min
Express
DEFROST
POWER
WEIGHT
STOP
CLEAR
START
AUTO
MINUTE
CPU UNIT
COOK
DEF.
KG
QTY.
CHECK
LIQUID CRYSTAL DISPLAY
KEY UNIT
VC
GND
GND
26
R-246(G)
R-246(SL)
R-246(W)
R-246(SL)
R-246(W)
Figure S-3. Printed Wiring Board
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
*
*
*
*
*
*
*
*
∆
*
*
PARTS LIST
ELECTRIC PARTS
1- 1
QACC-A088WRE0
Power supply cord
1
AW
1- 2
FPWBFA347WRKZ
Noise filter
1
AX
1- 3
FH-DZA103WRKZ
High voltage rectifier
1
AS
1- 3
FH-DZA082WRK0
High voltage rectifier (Interchangeable)
1
AQ
1- 3
FH-DZA087WRK0
High voltage rectifier (Interchangeable)
1
AQ
1- 4
QSW-MA085WRE0
Monitored latch switch
1
AF
1- 4
QSW-MA137WRE0
Monitored latch switch (Interchangeable)
1
AH
1- 5
QSW-MA086WRE0
Monitor switch
1
AF
1- 5
QSW-MA138WRE0
Monitor switch (Interchangeable)
1
AH
1- 6
QSW-MA085WRE0
2nd. interlock relay control switch
1
AF
1- 6
QSW-MA137WRE0
2nd. interlock relay control switch (Interchangeable)
1
AH
1- 7
RC-QZA295WRZZ
High voltage capacitor
1
AV
1- 7
RC-QZA218WRE0
High voltage capacitor (Interchangeable)
for production use
1
--
1- 8
RMOTEA403WRZZ
Fan motor
1
AZ
1- 8
RMOTEA340WRE0
Fan motor (Interchangeable)
1
AX
1- 8
RMOTEA389WRE0
Fan motor (Interchangeable) for production use
1
AX
1- 9
RV-MZA306WRZZ
Magnetron
1
BL
1-10
RLMPTA083WRZZ
Oven lamp
1
AM
1-11
RMOTDA173WRE0
Turntable motor
1
AX
1-11
RMOTDA226WRE0
Turntable motor (Interchangeable)
1
AT
1-12
RTHM-A116WRE0
Thermal cut-out 125˚C (OVEN)
1
AK
1-12
RTHM-A078WRE0
Thermal cut-out 125˚C (OVEN) (Interchangeable)
1
AK
1-13
RTRN-A679WRZZ
High voltage transformer
1
BK
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
3
DIP
,F
CHIP SIDE
R4
C2
D3
C1
C21
Q21
D1
D2
D4
Q22
VRS1
D40
B
B
1
1
1
7
S
P
4
3
2
2
E
E
R30
D22
(R21)
1
3
RY1
RY2
D20
(ZD2)
CN - B
CN - A
SP1
C8
(Q23)
B
E
D21
(J2)
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