Sharp R-120DG User manual

R-120DG
R-120DP
R-120DSC
TABLE OF CONTENTS Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ...................INSIDE FRONT COVER
BEFORE SERVICING ......................................................................................................INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL................................................................................................................1
FOREWORD AND WARNING...............................................................................................................................2
PRODUCT DESCRIPTION....................................................................................................................................3
PICTORIAL DIAGRAM ..........................................................................................................................................4
PARTS LIST ..........................................................................................................................................................5
PACKING AND ACCESSORIES ...........................................................................................................................9
S5012R120DPG/
MICROWAVEOVEN
MODEL R-120DG
R-120DP
R-120DSC
Intheinterestofuser-safetytheovenshouldberestoredtoitsoriginal
condition and only parts identical to those specified should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
VoltagePowerTransformer,Magnetron,HighVoltageRectifier
Assembly, High Voltage Harness etc..)
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
SUPPLEMENTAL SERVICE MANUAL
This is a supplemental Service Manual for Models R-120DG, R-120DP, R-120DSC. This model is
quite similar to base model R-120DW. Use this supplemental manual together with the Base Model Service Manual
(Refer No. is S3007R120DPW/) for complete operation, service information, etc..
HALF PINT
ON DEF LBS QTY CHECK
START/MINUTE LUS
STOP/CLEAR

R-120DG
R-120DP
R-120DSC
PRECAUTIONS TO BE OBSERVED BEFOREAND
DURING SERVICING TOAVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE
ENERGY
(a) Do not operate or allow the oven to be operated with the door open.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwave source, and make repairs as necessary: (1) interlock operation, (2) proper door closing, (3)
seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and
latches, (5) evidence of dropping or abuse.
(c) Before turning on microwave power for any service test or inspection within the microwave generating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
integrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave
generation and transmission systems shall be repaired, replaced, or adjusted by procedures described
in this manual before the oven is released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performed on each oven prior to release to the owner.
BEFORE SERVICING
Before servicing an operative unit, perform a microwave emission check as per the Microwave
Measurement Procedure outlined in this service manual.
If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS
CORPORATION immediately @1-800-237-4277.
If the unit operates with the door open, service person should 1) tell the user not to operate the oven
and 2) contact SHARP ELECTRONICS CORPORATION and The Food and Drug Administration's
Center for Devices and Radiological Health immediately.
ServicepersonnelshouldinformSHARPELECTRONICSCORPORATIONofanycertifiedunitfound
with emissions in excess of 4mW/cm2. The owner of the unit should be instructed not to use the unit
until the oven has been brought into compliance.

1
R-120DG
R-120DP
R-120DSC
WARNING TO SERVICE PERSONNEL
Microwave ovens contain circuitry capable of pro-
ducing very high voltage and current, contact with
following parts
may result in a severe, possibly
fatal, electrical shock.
(Example)
HighVoltageCapacitor,HighVoltagePowerTrans-
former,Magnetron,HighVoltageRectifierAssem-
bly, High Voltage Harness etc..
Read the Service Manual carefully and follow all
instructions.
Before Servicing
1. Disconnectthepowersupplycord ¬,and thenremove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
WARNING:RISK OF ELECTRIC SHOCK.
DISCHARGE THE HIGH-VOLTAGE
CAPACITOR BEFORE SERVICING.
The high-voltage capacitor remains charged about 60
secondsaftertheovenhasbeenswitchedoff.Waitfor60
secondsandthenshort-circuittheconnectionofthehigh-
voltagecapacitor (thatisthe connectingleadofthehigh-
voltage rectifier) against the chassis with the use of an
insulated screwdriver.
Whenever troubleshooting is performed the power supply
mustbedisconnected.Itmay,insomecases,benecessary
to connect the power supply after the outer case has been
removed, in this event,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power
transformer.
5. Ensure that the leads remain isolated from other
components and oven chassis by using insulation tape.
6. After that procedure, reconnect the power supply cord.
When the testing is completed,
1. Disconnect the power supply cord, and then remove
outer case.
2. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Reconnect the leads to the primary of the power
transformer.
5. Reinstall the outer case (cabinet).
6. Reconnectthe powersupply cordafter theoutercase is
installed.
7. Run the oven and check all functions.
After repairing
1. Reconnect all leads removed from components during
testing.
2. Reinstall the outer case (cabinet).
3. Reconnectthe powersupply cordafter theoutercase is
installed.
4. Run the oven and check all functions.
Microwave ovens should not be run empty. To test for the
presence of microwave energy within a cavity, place a cup
of cold water on the oven turntable, close the door and set
the power to HIGH and set the microwave timer for two (2)
minutes.When thetwo minuteshas elapsed(timer atzero)
carefully check that the water is now hot. If the water
remainscoldcarryoutBeforeServicingprocedureandre-
examine the connections to the component being tested.
When all service work is completed and the oven is fully
assembled,themicrowavepoweroutputshouldbechecked
and a microwave leakage test should be carried out.
Don't Touch !
Danger High Voltage

2
R-120DG
R-120DP
R-120DSC
SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
SERVICE MANUAL
MICROWAVE OVEN
R-120DG/ R-120DP/ R-120DSC
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service
Information for the SHARP MICROWAVE OVEN, R-120DG, R-120DP, R-120DSC.
The models R-120DG, R-120DP and R-120DSC are quite similar to base model R-120DW (Refer No. is S3007R120DPW/).
Itis recommendedthat servicepersonnel carefullystudy theentire textof thismanual andthe basemodel's manualso that
they will be qualified to render satisfactory customer service.
Check the interlock switches and the door seal carefully. Special attention should be given to avoid electrical shock and
microwave radiation hazard.
WARNING
Never operate the oven until the following points are ensured.
(A) The door is tightly closed.
(B) The door brackets and hinges are not defective.
(C) The door packing is not damaged.
(D) The door is not deformed or warped.
(E) There is no other visible damage with the oven.
Servicing and repair work must be carried out only by trained service personnel.
DANGER
Certain initial parts are intentionally not grounded and present a risk of electrical shock only during servicing.
Service personnel - Do not contact the following parts while the appliance is energized;
High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage
Harness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
All the parts marked “*” on parts list are used at voltages more than 250V.
Removal of the outer wrap gives access to voltage above 250V.
Allthepartsmarked“∆”onpartslistmaycauseunduemicrowaveexposure,bythemselves,orwhentheyaredamaged,
loosened or removed.

3
R-120DG
R-120DP
R-120DSC
ITEM DESCRIPTION
Power Requirements 120 Volts
60 Hertz
Single phase, 3 wire grounded
Power Consumption 1030W / Approx. 9 Amperes
Power Output 600 W nominal of RF microwave energy (IEC Test procedure)
Operating frequency 2450 MHz
Case Dimensions Width 14-3/8"
Height 14-1/8"
Depth 14"
Cooking Cavity Dimensions Width 11-3/4"
(0.7 Cubic feet) Height 16"
Depth 11-7/8"
Control Complement Touch Control System
Clock (1:00 - 12:59)
Timer (0 - 99 minutes 45 seconds)
POPCORN pad
EXPRESS DEFROST pad
COMPU COOK pad
DOUBLE QUANTITY pad
STOP/ CLEAR pad (STOP/CLEAR button)
CLOCK/ TIMER pad
10 MINUTES pad
1 MINUTE pad
15 SECONDS pad
START/ MINUTE PLUS button
Oven Cavity Light Yes
Safety Standard UL Listed.
FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
PRODUCT DESCRIPTION
SPECIFICATIONS
Figure O-1. Oven Schematic-Off Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED
2. CLOCK APPEARS ON DISPLAY
POWER
TRANSFORMER
RECTIFIER MAGNETRON
CAPACITOR
0.72µF
C/T FUSE
120V AC
60 Hz
OVEN
LAMP TURN-
TABLE
MOTOR FAN
MOTOR
MONITOR
SWITCH
SECONDARY
INTERLOCK
SWITCH
TTM
OL FM
GRN
A3
COM.
N.O.
DOOR
SENSING
SWITCH
B2 B1
(RY-1) (RY-2)
CONTROL UNIT
PRIMARY
INTERLOCK
RELAY
MAGNETRON
THERMAL CUT-OUT
A1

4
R-120DG
R-120DP
R-120DSC
6
45
123
6
45
123
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
Figure S-1. Pictorial Diagram
WHT
RED
GRY
HIGH VOLTAGE COMPONENTS
MAGNETRON
HIGH VOLTAGE CAPACITOR
H.V. RECTIFIER
MONITOR SWITCH
TURNTABLE MOTOR
FAN MOTOR
OVEN LAMP & SOCKET
GRY GRY
SECONDARY INTERLOCK SWITCH
COM
COM
RED
GRY
RED
GRY
N.C.
N.O. GRY
GRN GRN
GRY
WHT
C/T FUSE POWER SUPPLY CORD
120V 60Hz
GRD
HN
NOTE: The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw. The screw must always be kept tight.
NOTE: The neutral (WHT) wire must be connected to the terminal with "N" mark on the power supply cord.
RED
WHT
DOOR SENSING SWITCH
To fan duct
BLU
BLK
POWER TRANSFORMER
HIGH VOLTAGE WIRE
BLK Blue Mark
NOTE: Hot (RED) wire must be connected to the terminal with blue mark on the oven light socket.
RED RED
WHT
GRN
CONTROL PANEL
BLU
RED
WHT
MAGNETRON THERMAL CUT-OUT
BLKBLK
SP
RY1
PRIMARY INTERLOCK RELAY
CN-B
2
1
CN-A
3
1
RY2
RED
BLK
RED
WHT
CN-A 2
1 3
CN-B
2 1GRN
GRY
RED
BLK
COM
N.O.

5
R-120DG
R-120DP
R-120DSC
∆
∆
PARTS LIST
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
*
*
*∆
*∆
*
ELECTRIC PARTS
1- 1 QSW-MA137WRE0 Secondary interlock switch & door sensing switch 2 AH
1- 2 FFS-BA027WRKZ
C/T fuse (120˚C, 13A) & monitor switch (AM51620C53Y1) assembly 1AS
1- 3 FACCDA079WRE0 Power supply cord 1 AF
1- 4 QSOCLA021WRE0 Oven lamp socket 1 AH
1- 5 FH-DZA095WRKZ High voltage rectifier 1 AQ
1- 6 RC-QZA209WRE0 High voltage capacitor 1 AX
1- 7 RMOTEA383WRE0 Fan motor 1 AV
1- 8 RV-MZA195WRE0 Magnetron 1 BK
1- 8 RV-MZA198WRE0 Magnetron (Iinterchangeable) 1 BN
1- 9 RLMPTA068WRE0 Oven lamp 1 AG
1-10 RMOTDA211WRE0 Turntable motor 1 AS
1-10 RMOTDA186WRE0 Turntable motor (Iinterchangeable) 1 AW
1-11 RTHM-A117WRE0 Thermal cut-out 95˚C 1 AQ
1-12 RTRN-A606WRZZ Power transformer 1 BM
CABINET PARTS
2- 1 GCABUA779WRPZ Outer case cabinet [R-120DSC] 1 BB
2- 1 GCABUA781WRPZ Outer case cabinet [R-120DG] 1 BB
2- 1 GCABUA783WRPZ Outer case cabinet [R-120DP] 1 BB
2- 2 GDAI-A325WRWZ Bottom plate 1 AF
2- 3 GLEGPA074WRE0 Foot 2 AC
CONTROL PANEL PARTS
3- 1 DPWBFC045WRUZ Control unit 1 BB
3- 2 FPNLCB485WRKZ Panel frame with key unit 1 AY
3- 2-1 HPNLCB607WRFZ Control panel 1 AN
3- 2-2 PSHEPA723WREZ Key sheet 1 AM
3- 3 PPACGA175WREZ Packing 1 AF
OVEN PARTS
4- 1 PHOK-A117WRPZ Latch hook 1 AH
4- 2 PDUC-A740WRWZ Air intake duct 1 AD
4- 3 LBNDKA132WRP0 H.V. Capacitor holder 1 AD
4- 4 PDUC-A736WRPZ Magnetron air duct 1 AF
4- 5 PDUC-A743WRPZ Exhaust duct 1 AD
4- 6 PCUSUA541WRPZ Cushion 1 AC
4- 7 PDUC-A745WRWZ Fan duct 1 AE
4- 8 NFANJA029WRE0 Fan blade 1 AL
4- 9 PCUSUA540WRPZ Cushion 1 AC
4-10 PDUC-A752WRFZ Top air separator 1 AD
4-11 ************* Oven cavity (Not replaceable part) 1--
4-12 PCOVPA359WREZ Waveguide cover 1 AD
4-13 GLEGPA078WRFZ Leg (Left) 1 AE
4-14 GLEGPA079WRFZ Leg (Right) 1 AE
4-15 PDUC-A746WRFZ Air separator 1 AE
4-16 PSKR-A367WRFZ Barrier 1 AE
4-17 PCUSGA541WRPZ Cushion 2 AC
4-18 PPACGA097WRE0 O-ring 1 AG
4-19 PCUSUA542WRPZ Cushion 1 AC
4-20 PCUSGA543WRPZ Cushion 1 AC
4-21 PCUSUA543WRPZ Cushion 1 AC
4-22 PCUSUA544WRPZ Cushion 1 AC
4-23 LANGTA369WRPZ Chassis support 1 AF
4-24 PDUC-A753WRPZ Air duct 1 AE
4-25 LANGTA370WRPZ Support angle 1 AD
4-26 PCUSGA544WRPZ Cushion 1 AE
4-27 PCUSUA212WRP0 Cushion 1 AB
4-28 PCUSUA545WRPZ Cushion 1 AC
4-29 PCUSUA546WRPZ Cushion 1 AC
4-30 PSPAKA006WREZ Spacer 1 AE
4-31 PCUSUA452WRP0 Cushion 1 AB
4-32 PSPAKA008WREZ Spacer 1 AC
4-33 PSPAKA007WREZ Spacer 1 AC
4-34 LX-WZA053WREZ Special washer 1 AC
4-35 PSPAKA005WREZ Spacer 1 AC
4-36 PSPAKA004WREZ Spacer 1 AC
Rerer to "POSTION OF SPACERS" on page 9

6
R-120DG
R-120DP
R-120DSC
REF. NO. PART NO. DESCRIPTION Q'TY CODE
*
HOW TO ORDER REPLACEMENT PARTS
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
2. REF. NO.
3. PART NO.
4. DESCRIPTION
Order Parts from the authorized SHARP parts Distributor for your area.
Defective parts requiring return should be returned as indicated in the Service Policy.
∆
∆
DOOR PARTS
5- 1 FDORFA341WRTZ Door panel 1 AX
5- 2 GWAKPA743WRRZ Door frame [R-120DSC] 1 AX
5- 2 GWAKPA747WRRZ Door frame [R-120DG] 1 AX
5- 2 GWAKPA749WRRZ Door frame [R-120DP] 1 AX
5- 3 JBTN-B119WRFZ START/MINUTE PLUS button and STOP/CLEAR button 2 AE
5- 4 MSPRTA196WREZ Button spring 2 AC
5- 5 LSTPPA194WRFZ Latch head 1 AE
5- 6 MSPRTA084WRE0 Latch spring 1 AB
5- 7 PSHEPA722WREZ Sealer film 1 AE
5- 8 GCOVHA418WRFZ Choke cover 1 AL
5- 9 LSTPPA196WRFZ Door stopper 1 AC
5-10 XEPSE30P08XS0 Screw : 3mm x 8mm 4 AC
5-11 PCUSUA555WRPZ Cushion 1 AH
MISCELLANEOUS
6- 1 FROLPA089WRK0 Turntable support 1 AP
6- 2 NTNT-A060WRE0 Turntable 1 AP
6- 3 TINSEA857WRRZ Instruction book 1 AD
6- 4 FW-VZB784WREZ Switch harness 1 AF
6- 5 FW-VZB773WREZ Main wire harness 1 AR
6- 6 QW-QZA239WRZZ High voltage wire 1 AH
6- 7 TCAUAA166WRR0 DHHS caution label 1 AC
6- 8 TCAUAA258WRRZ Monitor caution 1 AC
6- 9 TCAUAA240WRR0 Screw caution 1 AC
SCREWS AND WASHERS
7- 1 XEPSD30P08KS0 Screw : 3mm x 8mm 6 AA
7- 2 XOTSD40P08000 Screw : 4mm x 8mm 20 AA
7- 3 LX-EZA042WRE0 Special screw 4 AB
7- 4 LX-CZ0052WRE0 Special screw 2 AA
7- 5 LX-CZA070WRE0 Special screw (Torx tamper proof screw) 2 AC
7- 6 LX-WZA028WRE0 Special washer 1 AB
7- 7 XHTSD40P12RV0 Screw : 4mm x 12mm 1 AA
7- 8 XHPSD40P08K00 Screw : 4mm x 8mm 6 AA
7- 9 XHPSD30P06000 Screw : 3mm x 6mm 2 AA
7-10 XHTSD40P08RV0 Screw : 4mm x 8mm 6 AA
7-11 XOTSD40P12RV0 Screw : 4mm x 12mm 4 AA
7-12 XETSD40P08000 Screw : 4mm x 8mm 2 AA
7-13 LX-CZA079WREZ Special screw 1 AA

7
R-120DG
R-120DP
R-120DSC
6
45
123
6
45
123
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
OVEN AND CABINET PARTS
,,
,,
,,
,,
,,
,,
,,
,,
,
,
7-2
7-2
7-2
7-2
7-5
7-8
1-8
4-5
4-4
4-36
7-9
1-12
1-11
4-3
2-2
4-2
4-28
4-15
6-2
6-1
7-10
7-2
4-6
2-1
7-10
1-5
1-2
7-13
7-12 7-12
7-10 7-3
6-9
6-7
4-20
4-10
7-2
7-10
7-4
4-32
4-33
4-8
6-8
4-19 1-7
7-2
4-24
4-16
7-2
7-2
7-2
4-23
7-7
4-34
4-35
1-3
4-9
4-7
4-30
4-31
4-1
1-10
7-8
4-18
7-6
4-12
7-2
4-13
7-11
4-14
4-17
4-17
7-2
1-1
1-1
2-3
7-2
1-2
7-2
7-8
1-6
7-2 4-25
4-22
4-21
4-29
4-26
4-27
1-9
1-4
4-11

8
R-120DG
R-120DP
R-120DSC
6
45
123
6
45
123
A
B
C
D
E
F
G
H
A
B
C
D
E
F
G
H
MISCELLANEOUS
CONTROL PANEL PARTS
DOOR PARTS
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
6-5 6-6
Actual wire harness may be different than illustration.
6-4
5-10
5-11
5-10
5-10
3-2-2
3-2-1
5-9
5-10
3-2
3-1
3-3
7-1
5-5
5-6
5-1
5-8
5-7
5-3
5-4
5-2