Sharp R-750AM (serv.man2) Service Manual ▷ View online
12
750A -
WIRING DIAGRAMS
Figure O-1 Oven Schematic
Note:
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND
AC CORD CONNECTION
BRN : BROWN
BLU : BLUE
G-Y : GREEN AND
YELLOW STRIPE
/15 : SECTIONAL AREA
OF 1.5mm
2
MIN
Indicates components
with potential above 250 V.
with potential above 250 V.
230V/240V ~ 50Hz
EARTH
0.22
µ
/ AC250V
FUSE
15A
15A
NOISE SUPPRESSION COIL
0.0047
µ
/ 250V
0.0047
µ
/ 250V
MAG
THERMAL
CUT OUT
125˚C
THERMAL
CUT OUT
125˚C
FUSE
F8A
F8A
*
H.V. RECTIFIER
*
H.V.
CAPACITOR
1.07
1.07
µ
F
2100VAC
*
MAGNETRON
*
POWER TRANSFORMER
GRILL HEATER
TURNTABLE
MOTOR
FAN MOTOR
OVEN LAMP
A3
A1
SW3:
STOP
SW
RY3
COM
RY1
NO
B1
B2
COM
NO
FM
OL
A5
RY2
G-Y / 15
BLU / 15
BRN / 15
N
GRILL
THERMAL
CUT-OUT
150˚C - 130˚C
THERMAL
CUT-OUT
150˚C - 130˚C
SW2:
MONITOR
SWITCH
MONITOR
SWITCH
SW1:
MONITORED
LATCH
SWITCH
SWITCH
10M/0.5W
680K/0.5W
NO
OVEN
THERMAL
CUT-OUT
160˚C
*
ASYMETRIC
RECTIFIER
NO
NC
L
TTM
13
750A -
Figure S-1. Pictorial Diagram
GRILL HEATER
BLU
WHT
RED
CONTROL PANEL
CN-B
MON
SW.
MON
SW.
TTM:
TURNTABLE
MOTOR
OVEN LAMP
TC1: MAG C/O
TC3: GRILL C/O
TC2: OVEN C/O
LIVE
POWER SUPPLY CORD
FM: FAN MOTOR
ASYMMETRIC
RECTIFIER
MG: MAGNETRON
T:
HVT
C: HV CAPACITOR
HV WIRE A
HV WIRE B
HV
RECT
NEUTRAL
EARTH
MON
LATCH
SW.
RY*3
NO
COM
NO
COM
RY*2
CN-A
WHT
ORG
BLK
BLU
BLU
RED
BLK
RED
RED
BLU
WHT
WHT
GRN
BLK
BLU
BLU
GRY
BRN
BRN
BLU
WHT
ORG
RED
BRN
BLU
WHT
BRN
BLK
BLU
BLU
BLU
G/Y
RED
WHT
RED
BRN
BRN
BLU
WHT
BRN
BLK
WHT
BLU
GRY
WHT
BLK
GRN
RED
PICTORIAL DIAGRAMS
14
750A -
Figure S-2. Control Panel Circuit
CONTROL PANEL CIRCUIT
51
64
20
R81
21
INT1
22
R83
23
R90
24
R91
25
R92
26
VDD
27
R40
28
R41
29
R42
30
R43
31
R50
32
R51
SEG20
63
SEG19
62
SEG18
61
SEG17
10G471K
C1 0.1
µ
/50v
C21
0.1
µ
/50v
R32
10K
ZD1 HZ5C2
ZD2
C4
C5
HZ4A2
C3
0.1
µ
/50v
C2 470
µ
/50v
10
µ
/50v
C20
C6 10
µ
/50v
C7 0.1
µ
/50v
R40 3.3k
IC1 IZA856DR
R3 4.7k
R5 240
R4 4.7k
R21 4.7k
R31 4.7k
R61 4.7k
C30
SP1
D20
D21
D22
VRS1
60
SEG16
59
SEG15
58
VDD
57
SEG14
S12
S11
S10
S11
S10
S 9
S 8
S 7
S 6
S 5
S 4
S 3
S 2
S 1
S 8
S 7
S 6
S 5
S 4
S 3
S 2
S 1
C 1
C 2
C 3
C 2
C 3
56
SEG13
55
SEG12
54
SEG11
53
SEG10
52
SEG 9
1
SEG21
2
SEG22
3
SEG23
4
COM1
5
COM2
6
COM3
7
COM4
8
VLC
9
VSS
10
XIN
11
XOUT
12
K00
13
K01
14
K02
15
K03
16
TEST
17
RESET
18
HOLD
19
INT2
SEG 8
50
SEG 7
49
SEG 6
48
SEG 5
47
SEG 4
46
SEG 3
45
SEG 2
44
SEG 1
43
SEG 0
42
R73
41
R72
40
R71
39
R70
38
R63
37
R62
36
R61
35
R60
34
R53
33
R52
+
–
+
–
+
–
+
–
A 3
A 1
B 2
B
1
A 5
NO
NO
COM
COM
b
a
c
RY1
RY2
(J11)
(J10 )
RY3
: IF NOT SPECIFIED 1/4w
±
5%
: IF NOT SPECIFIED 1SS270A
: IF NOT SPECIFIED 0.01
µ
F / 16v
D23
NOTE
R30 15k
R10 4.7k
(J5)
(J3)
WH-2
LIQUID CRYSTAL DISPLAY
LD1
LD2
LD3
LD4
WH-1
(J7)
(J9)
CF1 4MHz
CR60
KEY UNIT
CONTROL UNIT
D30
DOOR SWITCH
T1
D1
D2
D4
D3
D1-D4
11ES1
Q40
KRA101M
Q24
KRA101M
Q21
KRA223M
Q22
KRA223M
Q23
KRC243K
Q1
KRA101M
AC240V
50Hz
OVEN LAMP
FAN MOTOR
TURNTABLE
MOTOR
HEATER
HIGH
VOLTAGE
TRANSFORMER
Q2
DTA123ES
Q3
2SB1238
R1
510
1w
R2
510
1w
d
(J2)
(J4)
(J6)
(J8)
G 1
G 2
G 3
G 4
G 5
G 6
G 7
G 8
G12
G11
G10
G 9
R62 4.7k
R63 4.7k
R64 4.7k
R67 4.7k
R68 4.7k
1min.
AUTO
DEFROST
10sec.
AUTO
COOK
DUAL
GRILL
MICROWAVE
POWER
LEVEL
CONVENI
-ENCE
FOODS
STOP/
CLEAR
AUTO START
AUTO
MINUTE
CLOCK
START
GRILL
LESS
g • oz
Kg • Lb
Kg / Lb
TIMER
MORE
10min.
(J1)
15
750A -
Figure S-3. Printed Wiring Board
1
LD1
LD2
LD3
WH-2
R65
E
E
E
E
B
B
B
Q2
ZD2
Q24
R51
R2
R1
D2
D1
D3
D4
(J10)
R60
R21
R52
R53
MICRO
RY3
RY2
OL/FM
/TTM
/TTM
B
C
A
AC
R31
R50
CF1
2
6
8
10
12
11
7
D30
D23
Q22
Q20
D22
5
1
D20
VRS1
CN - A
(J3)
(J5)
(J7)
(J5)
(J7)
(J8)
CN - B
1
2
R10
R61
R62
R63
R64
R66
R67
R68
C1
S1
WH-1
WH-1
64
52
51
33
32
20
11
2
19
1
IC1
3
(J6)
(J4)
(J2)
ZD1
1
5
9
4
(J9)
SW63
CR60
Q40
Q3
R30
R40
R20
R22
D21
RY1
GRILL
SW50
(J11)
(J1)
F
ZD20
R3
C30
C50
C51
C5
C6
C4
C1
C2
C21
C20
Q23
Q1
Q21
SP1
C7
R4
R5
B
B
E
E
E
E
E
B
C3
B
S
P
T1
B
SW62
CN - G
SW61
WH-2
DIP
LD4
QKITPA018URE0
SW60
WIRING DIAGRAMS
Click on the first or last page to see other R-750AM (serv.man2) service manuals if exist.