R-8740 (serv.man13). Schematic diagrams — Sharp Home Appliance Service Manual (repair manual)

Model
R-8740 (serv.man13)
Pages
4 Few pages! See other manuals at the bottom of the first or last page.
Size
662.34 KB
Type
PDF
Document
Service Manual
Brand
Device
Home Appliance / Microwave Oven / Schematic diagrams
File
r-8740-sm13.pdf
Date

View Sharp R-8740 (serv.man13) Service Manual online

R-8740M  - 35
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. MICROWAVE POWER LEVEL KEY
PRESSED ONCE (100%)
4. START KEY PRESSED.
Figure O-1 Oven Schematic-OFF Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2.
    :
 OR CLOCK APPEARS ON DISPLAY.
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
Figure O-2 Oven Schematic-Microwave Cooking Condition
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
  
 SCHEMATIC DIAGRAMS
/R-8740M
C1
C3
STOR
THERMI-
B2
B1
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
 
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230V-240v       50Hz
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
/R-8740M
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
 
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230-240V       50Hz 
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
R-8740M  - 36
   SCHEMATIC DIAGRAMS
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. GRILL KEY PRESSED ONCE
4.  START KEY PRESSED
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
Figure O-3(a) Oven Schematic-Grill Cooking Condition (TOP GRILL mode)
Figure O-3(b) Oven Schematic-Grill Cooking Condition (BOTTOM HEATER mode)
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. GRILL KEY PRESSED TWICE.
4. START KEY PRESSED.
R-8740M
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
 
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230V-240V       50Hz
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
R-8740M
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230V-240V       50Hz
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
R-8740M  - 37
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. GRILL KEY PRESSED THREE TIMES.
4. START KEY PRESSED.
Figure O-4 Oven Schematic - Convection Cooking Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. CONVECTION TEMPERATURE SELECTED
4. START KEY PRESSED.
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
Figure O3(c). Oven Schematic - Grill Cooking Condition  (TOP AND BOTTOM mode)
   SCHEMATIC DIAGRAMS
R-8740M
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22   F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230V-240V       50Hz 
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
R-8740M
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230V-240V       50Hz 
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
R-8740M  - 38
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. DUAL COOKING KEY PRESSED THREE TIMES.
4. START KEY PRESSED.
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
Figure O5(b). Oven Schematic - Dual Cooking Condition  (MICROWAVE AND BOTTOM GRILL mode)
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
*CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230-240v       50Hz R-8740M
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
Figure O-5(a) Oven Schematic-Dual Cooking Condition (MICROWAVE AND TOP GRILL mode)
NOTE:  *INDICATES COMPONENTS WITH POTENTIALS ABOVE 250V
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. DUAL COOKING KEY PRESSED TWICE.
4. START KEY PRESSED.
   SCHEMATIC DIAGRAMS
C1
C3
STOR
THERMI-
B2
B1
SWITCH
STOP
UNIT
CONTROL
F1:FUSE
CAPACITOR
F2:FUSE
EARTH
*MAGNETRON
*POWER
TRANSFORMER
BLU
BRN
*ASYMMETRIC
RECTIFIER
*H.V. RECTIFIER
NEUTRAL
LIVE
NOISE SUPPRESSION COIL
NOISE
FILTER
/15
/15
G-Y/15
0.22  F/250V
N
L
10M/0.5W
4700u/250V
4700u/250V
680K/0.5W
GRILL HEATER (TOP)
OVEN
THERMAL
CUT-OUT
OVEN LAMP
OL
F8A
TM
T
MOTOR
TURNTABLE
CUT-OUT
THERMAL
MG
    230-240v       50Hz R-8740M
N.C
SWITCH
MONITOR
20A
MONIT'D
LATCH
SWITCH
MOTOR
CONVECTION
CM
BOTTOM HEATER
FAN MOTOR
FM
RY4
 A1
A3
A5
A9
A11
RY7
RY5
RY1
RY3
RY2
N.O
COM
N.O
COM
N.O
COM
1.07uF 2100V
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  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).