Sharp R1481 Manual

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1. Disconnect the power supply cord, remove the oven
from wall and remove outer case (Refer to procedure of
Removal of Oven from Wall and Outer case Removal.)
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the wire leads from the fan motor and the
chassis support.
5. Remove one (1) screw holding the hood duct to oven
cavity.
6. Release the wire leads from the hole of the hood duct.
7. Lift up the fan motor side of the hood duct.
8. Remove...

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1. Disconnect the power supply cord.
2. Open the door and block it open.
3. Remove the three (3) screws holding the base cover to
the oven cavity
4. Remove the base cover from the oven cavity by pulling
REMOVAL)
4. Lift the oven lamp cover up.
5. Now, the oven lamp and the socket are found.
6. Screw the oven lamp off from the lamp socket.
7. Now, the oven lamp is  free.
TURNTABLE MOTOR REMOVAL
down and moving to the left slightly.
5. Disconnect the wire leads from the  turntable...

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the control panel.
17.Remove the key fixing plate from the control panel.
18.Tear the key unit from the key fixing plate.
19.Now, the key unit is free
NOTES FOR KEY UNIT REPLACEMENT
1. Do not reuse the torn key unit because the performance
of the adhesive becomes weak.
2. Before attaching a new key unit, wipe off remaining
adhesive on the key fixing plate surfaces completely with
a soft cloth soaked in alcohol.
3. When attaching the key unit to the key fixing plate, adjust
the...

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1. Disconnect the power supply cord and remove the oven
from wall and remove outer case. (Refer to procedure of
Removal of Oven from Wall and Outer case Removal)
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Remove the control panel assembly, referring to the
procedure of CONTROL PANEL ASSEMBLY ,
CONTROL UNIT AND KEY UNIT REMOVAL.
If the door sensing switch, secondary interlock switch and
monitor switch do not operate properly due to a
misadjustment,...

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latch holes correctly.
6. Re-install the door stopper to the door assembly.
7. Re-install the hood exhaust louver to the oven cavity
front face plate.
Note: After any service to the door;
(A) Make sure that door sensing switch and secondary
interlock switch are operating properly. (Refer to
chapter Test Procedures.)
(B) An approved microwave survey meter should be
used to assure compliance with proper microwave
radiation emission limitation standards.
After any servicing, make...

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6
45
12
3
6
45
12
3 A
B
C
D
E
F
G
HA
B
C
D
E
F
G
H
Figure S-1. Pictorial Diagram
HIGH
VOLTAGE
RECTIFIER HIGH VOLTAGE
CAPACITOR
HIGH VOLTAGE
WIRE A
HIGH VOLTAGE COMPONENTS
POWER 
TRANSFORMERPower Supply
cord 120V 60Hz
1 2 3
WHT
GRNBLK
WHT
GRNBLK
CAVITY
THERMAL
CUT-OUT
MAGNETRON
TEMPERATURE 
FUSE
WHTRED
BLKREDBLK
FAN
MOTOR
TURNTABLE
MOTOR
GRYORGWHTORG
ORG
RED
WHT
ORG
BLK WHTHOOD LAMPS
& SOCKETS
Blue 
Marking 
Blue Marking OVEN LAMP & SOCKET
to Chassis Support
CN-E...

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6
45
12
3
6
45
12
3 A
B
C
D
E
F
G
HA
B
C
D
E
F
G
H
Figure S-2. Control Panel Circuit
+
–
+ –
+–
+
–
A 7
VRS1 (J1)
D20 R110
R110 47 1/2w
C110 0.033µ/250v C110
D25 D26 D27 D28
T1
D1
D1-D4
11ES1
Q20
KRA101M
Q24
KRA101M
R20
1k 1/2w
RY4
RY5
RY1
RY2 NO NCRY3
Q25
KRA101M
Q26
KRA101M
Q28
KRA101MQ30
KRA101M
Q27
KRC243MQ40
KRA101M MOTOR RUN
CAPACITOR
TURNTABLE
MOTOR
HOOD LAMP
HOOD THERMO
HOOD MOTOR

COM(H)
FAN MOTOR
OVEN LAMP
STIRRER MOTOR
MICROHIGH

LOW

 COMQ4...

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6
45
12
3
6
45
12
3 A
B
C
D
E
F
G
HA
B
C
D
E
F
G
H
Figure S-3. Printed Wiring Board
DIP
,BFB
1
R10
C6C10
R4
R1
D4
(ZD2)
S1 S2
P (R2)D1 SP40C5
C7
D25
D20 46
4847 RY4
RY5
T1
(470V)
VRS1
(CN - A)
CN - A
AC(N) TTM RY3
AC(H)OL MICRO
FM ZD3
ZD1 ZD4 CF1 (J15)
R7
R40 27
28
29
30
31
32 (J11) (J10)
(R76)
(R100)
(D70)
D71
D72
D73
D74
D75
D76R77
R79
R80
R81
R82
R70
R71
R72
R73 
35 
3 1 B B  B 
B 
B  E  E E 
E B 
E 
E E E 
E 
E  B  B B 
B 
B  Q30  Q20 Q40 
Q3 
R83 R78
D77
(IC2)
34
42
C3
4356...

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PARTS LIST
Note: The parts marked ÒDÓ may cause undue microwave exposure.
The parts marked Ò*Ó are used in voltage more than 250V.
¤ MARK: PARTS DELIVERY SECTION
ELECTRIC PARTS
1- 1 FH-DZB012MRY0 M High voltage rectifier assembly  1 AK
1- 2 RC-QZA173WRE0 M High voltage capacitor  1 AR
1- 3 QFS-TA013WRE0 M Temperature fuse 150ûC (Magnetron)  1 AG
1- 4 RMOTDA182WRE0 M Turntable motor  1 AQ
1- 5 RMOTDA214WRE0 M Stirrer motor  1 AQ
1- 6 RTHM-B005MRE0 M Thermal cut-out N.O. 60ûC (Hood...

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REF. NO. PART NO. ¤ DESCRIPTION QTY CODE
IC1 RH-IZA876DRE0 J LSI 1 AW
Q3 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q4 VSDTA123ES/-3 J Transistor (DTA123ES) 1 AA
Q20 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q24-26 VSKRA101M//-3 J Transistor (KRA101M) 3 AB
Q27 VSKRC243M//-3 J Transistor (KRC243M) 1 AB
Q28 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
Q30 VSKRA101M//-3 J Transistor (KRA101M) 1 AB
R1 VRD-B12HF432J J Resistor      4.3k ohm   1/2W 1 AH
R2 VRD-B12EF152J J Resistor      1.5k...