R-734 (serv.man3). Part 2 Diagrams (31-37) - Sharp Home Appliance Service Manual (repair manual)

Model: R-734 (serv.man3)
Pages: 7
Size: 173.88 KB
Type: PDF
Document: Service Manual
Brand: Sharp
Device: Home Appliance / Microwave Oven / Part 2 Diagrams (31-37)
File: r-734-sm3.pdf
Date: 2018-11-20

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R-734 - 31
Figure O-2 Oven Schematic-Microwave cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. Door closed.
2. Cooking time set.
3. Cooking mode at microwave.
4. START button pressed.
SCHEMATIC
NOTE: CONDITION OF OVEN
1. Door closed.
2. Cooking mode at microwave.
3. Timer at zero.
Figure O-1. Oven Schematic-OFF Condition
Note: "     " Indicates components with potential above 250 V.
OL
TTM
OVEN  LAMP
FAN MOTOR
TURNTABLE MOTOR
GH: GRILL HEATING ELEMENT 
H.V. RECTIFIER
MG:
MAGNETRON
T: HIGH VOLTAGE 
    TRANSFORMER
C:
CAPACITOR
1.07 
µ
F
AC2100V
CONTROL UNIT
A5
RY3
COM.
COM.
A3
A1
B2
B1 
SW3:
STOP SWITCH
SW1:
 MONITORED 
LATCH SWITCH
TC1: 
MG.
THERMAL
CUT-OUT
TC2:
OVEN
THERMAL
CUT-OUT
SW2:
MONITOR 
SWITCH
0.0047
µ
/ 250V
0.0047
µ
/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
F1: SPECIALFUSE 20A
F2: 
FUSE
F8A
NOISE FILTER
L
N
230V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.C.
N.O.
N.O.
N.O.
N.O.
 ASYMMETRIC
 RECTIFIER
RY1
RY2
FM
OL
TTM
OVEN  LAMP
FAN MOTOR
TURNTABLE MOTOR
GH: GRILL HEATING ELEMENT 
H.V. RECTIFIER
MG:
MAGNETRON
T: HIGH VOLTAGE 
    TRANSFORMER
C:
CAPACITOR
1.07 
µ
F
AC2100V
CONTROL UNIT
A5
RY3
COM.
COM.
A3
A1
B2
B1 
SW3:
STOP SWITCH
SW1:
 MONITORED 
LATCH SWITCH
TC1: 
MG.
THERMAL
CUT-OUT
TC2:
OVEN
THERMAL
CUT-OUT
SW2:
MONITOR 
SWITCH
0.0047
µ
/ 250V
0.0047
µ
/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
F2: 
FUSE
F8A
NOISE FILTER
L
N
230V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.C.
N.O.
N.O.
N.O.
N.O.
 ASYMMETRIC
 RECTIFIER
RY1
RY2
FM
F1: SPECIALFUSE 20A
SCHEMATIC DIAGRAMS

R-734 - 32
Figure O-3. Oven Schematic-Grill cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. Door closed.
2. Cooking time set.
3. Cooking mode at Grill.
4. START button pressed.
Figure O-4. Oven Schematic-Dual Cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. Door closed.
2. Cooking time set.
3. Cooking mode at Dual Grill.
4. START button pressed.
Note: "     " Indicates components with potential above 250 V.
OL
TTM
OVEN  LAMP
FAN MOTOR
TURNTABLE MOTOR
GH: GRILL HEATING ELEMENT 
H.V. RECTIFIER
MG:
MAGNETRON
T: HIGH VOLTAGE 
    TRANSFORMER
C:
CAPACITOR
1.07 
µ
F
AC2100V
CONTROL UNIT
A5
RY3
COM.
COM.
A3
A1
B2
B1 
SW3:
STOP SWITCH
SW1:
 MONITORED 
LATCH SWITCH
TC1: 
MG.
THERMAL
CUT-OUT
TC2:
OVEN
THERMAL
CUT-OUT
SW2:
MONITOR 
SWITCH
0.0047
µ
/ 250V
0.0047
µ
/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
F2: 
FUSE
F8A
NOISE FILTER
L
N
230V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.C.
N.O.
N.O.
N.O.
N.O.
 ASYMMETRIC
 RECTIFIER
RY1
RY2
FM
F1: SPECIALFUSE 20A
OL
TTM
OVEN  LAMP
FAN MOTOR
TURNTABLE MOTOR
GH: GRILL HEATING ELEMENT 
H.V. RECTIFIER
MG:
MAGNETRON
T: HIGH VOLTAGE 
    TRANSFORMER
C:
CAPACITOR
1.07 
µ
F
AC2100V
CONTROL UNIT
A5
RY3
COM.
COM.
A3
A1
B2
B1 
SW3:
STOP SWITCH
SW1:
 MONITORED 
LATCH SWITCH
TC1: 
MG.
THERMAL
CUT-OUT
TC2:
OVEN
THERMAL
CUT-OUT
SW2:
MONITOR 
SWITCH
0.0047
µ
/ 250V
0.0047
µ
/ 250V
10M/ 0.5W
NOISE SUPPRESSION COIL
680 k/ 0.5W
0.22
µ
/250V
F2: 
FUSE
F8A
NOISE FILTER
L
N
230V ~ 50Hz
BRN/15
BLU/15
G-Y/15
EARTH
LIVE
NEUTRAL
N.C.
N.O.
N.O.
N.O.
N.O.
 ASYMMETRIC
 RECTIFIER
RY1
RY2
FM
F1: SPECIALFUSE 20A
SCHEMATIC DIAGRAMS

R-734 - 33
Figure S-1. Pictrorial Diagram
BLK
RED
TC2:
OVEN THERMAL 
CUT-OUT
TC1:
MG. THERMAL
 CUT-OUT
OL: OVEN LAMP 
RED
WHT
WHT
WHT
5
RED
4
3
WHT
2
1
BLK
COM
WHT
WHT
WHT
YLW
RED
BLK
N.C.
N.O.
N.O.
COM
SW3:
STOP 
SWITCH
NO
NO
COM
COM
GH:  GRILL 
HEATING ELEMENT
RED
RED
WHT
BRN
BLU
GRN
GRN
GRN
WHT
TTM: 
TURNTABLE
MOTOR
SW2:
MONMITOR
SWITCH
SW1:
MONITORED
LATCH 
SWITCH
YLW
BLK
BLK
RED
WHT
CN-A
1
CN-B
2
RED
GRN
RED
BLK
RED
YLW
NOISE FILTER
L
TP
F 8 A
F2:
TL
RED
F1: 20 A
WHT
N
BLK
BLK
WHT
WHT
RED
WHT
FM: FAN 
       MOTOR
WHT
HIGH VOLTAGE COMPONENTS
G
–
Y
POWER SUPPLY CORD
NEUTRAL
LIVE
EARTH
CN-B
2
1
RY2
NO
COM
RY3
CONTROL PANEL
CN-A
T1
CN-G
1
5
MG: MAGNETRON
H.V.WIRE B
T:
C:
H.V. 
CAPACITOR
H.V.
RECTIFIER
ASYMMETRIC RECTIFIER
 HIGH VOLTAGE
 TRANSFORMER
WHT
WHT
BLK
BLK
YLW
RED
PICTORIAL DIAGRAM

R-734 - 34
Figure S-2. Control Panel Circuit
A 3
AC230V
50Hz
OVEN LAMP
FAN MOTOR
TURNTABLE
MOTOR
GRILL
HEATING
ELEMENT
HIGH
VOLTAGE
TRANSFORMER 
NOTE :
STOP SWITCH
SWITCH UNIT
CN-A
CN-B
T1
4
6
3
1
RY1
RY2
RY3
: IF NOT SPECIFIED, 1/4W 
±
 5%
D23
D30
R22 91 1/2w
R31 4.7k
R51 4.7k
R50 4.7k
CR60
CN-G
R32 10k
R30 15k
R10 4.7k
A
B
C50
C51 
C
SW50
D1-4
11ES1
D1
D3
WH-1
WH-2
R1 510 1w
R2 510 1w
LD1
LD2
LD3
LD4
D4
Q1
KRA101M
Q3
2SB1238
Q24
KRA101M
Q40
KRA101M
Q23
KRC243M
Q21
KRA223M
Q22
KRA223M
Q20
2SB1238
ZD20
HZ20-1
Q2
DTA123ES
D2
VRS1
10G471K
C3
0.1
µ
/50v
C21 0.1
µ
/50v
C6 10
µ
/50v
LIQUID CRYSTAL DISPLAY
C7 0.1
µ
/50v
IC-1
IXA089DR
D20
C30
R52
R61 4.7k
100k
100k
R53
R20 1k
D21
D22
C1 0.1
µ
/50v
C20
10
µ
/50v
C2 470
µ
/50v
SP1
C4
R3 4.7k
R40 3.3k
R21 4.7k
R5 240
R4 4.7k
C5
(J8)
(J6)
(J4)
(J2)
Constant 
RY : Timing 
Model
(J9)
(J7)
(J5)
(J3)
ZD1 HZ5C-2
ZD2 HZ4A2
CF1
CST4.00MGW
SEG20
R81
20
25
30
32
64
52
55
60
INT1
R83
R90
R91
R92
VDD
R40
R41
R42
R43
R50
R51
SEG19
SEG18
SEG17
SEG16
SEG15
VDD
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
C3
C2
C1
(J1)
b
c
d
a
A 1
A 5
NO
NO
COM
COM
B 1
B 2
G 1
G 2
G 3
G 4
G 5
G 6
+
–
R62 4.7k
+
–
+
–
SEG8
SEG21
1
5
10
15
35
40
45
19
51
33
SEG22
SEG23
COM1
COM2
COM3
COM4
VLC
VSS
XIN
XOUT
K00
K01
K02
K03
TEST
RESET
HOLD
INT2
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
R73
R72
R71
R70
R63
R62
R61
R60
R53
R52
: IF NOT SPECIFIED, 0.01
µ
F/16V
: IF NOT SPECIFIED, 1SS270A
CONTROL PANEL CIRCUIT

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