Sharp R-401FK Owner's manual

R-401FK
R-401FW
In the interest of user-safety the oven should be restored to its original condition and only parts identical to those specified
should be used.
WARNING TO SERVICE PERSONNEL: Microwave ovens contain 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 Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc..)
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
MICROWAVE MEASUREMENT PROCEDURE .................................................................................................. 2
FOREWORD AND WARNING ............................................................................................................................. 3
PRODUCT SPECIFICATIONS ............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................. 4
PARTS LIST ..........................................................................................................................................................6
PACKING AND ACCESSORIES ......................................................................................................................... 10
S13M204R401FE
R-401FK
R-401FW
MICROWAVE OVEN
MODELS
SUPPLEMENTAL SERVICE MANUAL
SHARP ELECTRONCS CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135
R-401FW
This is a supplemental Service Manual for Microwave Oven models R-401FKand R-401FW. This model is quite similar
to the base models R-402FW/R-404FK; (S42M185R402FE).
This supplemental manual must be used in conjunction with the base model service manual for complete operation,
service, safety and replacement parts information.

R-401FK
R-401FW
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE
ENERGY
(a) Do notoperate or allowthe oven to be operated with the dooropen.
(b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other
microwavesource, and makerepairs as necessary:(1) interlock operation,(2) properdoor closing, (3)
sealand sealing surfaces(arcing, wear, andother damage),(4) damage toor loosening ofhinges and
latches,(5) evidenceof dropping or abuse.
(c) Beforeturning onmicrowave powerfor any service test orinspection withinthe 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
manualbefore the ovenis released to the owner.
(e) A microwave leakage check to verify compliance with the Federal Performance Standard should be
performedon each ovenpriorto releasetothe 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
ELECTRONICSCORPORATIONimmediately @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 Food and
Drug Administration's Center for Devices and Radiological Health immediately.
Service personnel should inform SHARP ELECTRONICS CORPORATION of any certified unit
found 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.

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R-401FK
R-401FW
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. Disconnect the power supply cord , and then
remove 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(that is theconnecting lead ofthehigh-
voltage rectifier) against the chassis with the use of an
insulated screwdriver.
Whenever troubleshooting is performed the power supply
mustbedisconnected.Itmay,in somecases,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 power supplycord afterthe outercase 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 power supplycord afterthe outercase is
installed.
4. Run the oven and check all functions.
Microwaveovens shouldnotbeoperatedempty.Totestfor
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 the two minutes has elapsed (timer at
zero) 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

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R-401FK
R-401FW
MICROWAVE MEASUREMENT PROCEDURE
A. Requirements:
1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven
shouldnotexceed1mW/cm2atanypoint5cmormorefromtheexternalsurfaceoftheoven,measuredpriortoacquisition
byapurchaser,andthereafter(through the useful lifeoftheoven),5mW/cm2at any point 5cmormorefromtheexternal
surface of the oven.
2) Safety interlock switches:
Primary interlock relay switch shall prevent microwave radiation emission in excess of the requirement as above
mentioned. Secondary interlock relay and door sensing switch shall prevent microwave radiation emission in excess of
5 mW/cm2 at any point 5cm or more from the external surface of the oven.
B. Preparation for testing:
Before beginning the actual measurement of leakage, proceed as follows:
1) Make sure that the actual instrument is operating normally as specified in its instruction booklet.
Important:
Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for
microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing.
2) Place the oven tray in the oven cavity.
3) Place the load of 275±15 ml (9.8 oz) of tap water initially at 20±5O C (68OF) in the center of the oven cavity.
Thewatercontainershallbealowformof600ml(20oz)beaker with an inside diameter of approx. 8.5cm (3-1/2in.) and
made of an electrically nonconductive material such as glass or plastic.
Theplacing ofthis standardload inthe ovenis importantnot onlyto protectthe oven,but alsoto insurethat anyleakage
is measured accurately.
4) Set the cooking control on Full Power Cooking Mode.
5) Closethedoorandselectacookcycleofseveralminutes.Ifthewaterbeginstoboilbeforethesurveyiscompleted,replace
it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement):
1) Grasptheprobeofthesurveyinstrumentandholditperpendiculartothegapbetweenthedoorandthebodyoftheoven.
2) Movetheprobeslowly,notfasterthan 1in./sec.(2.5cm/sec.)alongthegap,watchingforthemaximum indicationonthe
meter.
3) Checkforleakageatthedoorscreen,sheetmetalseamsandotheraccessiblepositionswherethecontinuityofthemetal
has been breached (eg., around the switches, indicator, and vents).
Whiletestingforleakagearoundthedoor,pullthedoorawayfromthefrontoftheovenasfarasispermittedbytheclosed
latch assembly.
4) Measurecarefullyatthepointofhighestleakageandmakesurethatthehighestleakageisnogreaterthan4mW/cm2,and
that the primary interlock switch/secondary interlock relay does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.

3
R-401FK
R-401FW
SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
SUPPLEMENTAL SERVICE MANUAL
MICROWAVE OVEN
R-401FK/R-401FW
FOREWORD
ThissupplementalManualhasbeenpreparedtoprovideSharpElectronics
Corp. Service Personnel with Operation and Service Information for the
SHARPMICROWAVEOVENS,R-401FKandR-401FW.
The model R-401FK/FW is quite similar to base models R-402FW/R-
404FK(Ref.#S42M185R402FE).
Itisrecommendedthatservicepersonnelcarefullystudytheentiretextof
this manual so that they will be qualified to render satisfactory customer
service.
Checktheinterlockswitchesandthedoorsealcarefully.Specialattention
shouldbegiventoavoidelectricalshockandmicrowaveradiationhazard.
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
arisk ofelectricalshock only duringservicing.Service person-
nel - 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.
All the parts marked “∆” on parts list may cause undue microwave
exposure, by themselves, or when they are damaged, loosened or
removed.
PRODUCTDESCRIPTION
GENERALINFORMATION
PARTS LIST

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R-401FK
R-401FW
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed
and grounded in accordance with the National Electrical Code and local codes and ordinances.
Intheeventofanelectricalshortcircuit,groundingreducestheriskofelectricshockbyprovidinganescapewirefortheelectric
current.
WARNING: Improper use of the grounding plug can result in a risk of electric shock.
ElectricalRequirements
The electrical requirements are a 120 volt 60 Hz, AC only,
15or20amp.fusedelectricalsupply.Itisrecommendedthataseparatecircuitservingonlythisappliancebeprovided.When
installing this appliance, observe all applicable codes and ordinances.
A short power-supply cord is provided to reduce risks of becoming entangled in or tripping over a longer cord.
Whereatwo-prongedwall-receptacleisencountered,itisthepersonalresponsibilityandobligationofthecustomertocontact
SPECIFICATION
ITEM DESCRIPTION
PowerRequirements 120 Volts
13.0Amperes, 1550 watts
60Hertz
Singlephase,3wiregrounded
PowerOutput 1000watts (IEC 705 TESTPROCEDURE)
Operatingfrequencyof2450MHz
CaseDimensions Width 21-11/16"
Height 12-3/8"
Depth 17-3/8"
CookingCavityDimensions Width 15
1.6 Cubic Feet Height 9-7/16"
Depth 16-3/4"
ControlComplement TouchControl System
Clock ( 1:00 - 12:59 )
Timer (0 - 99 min. 99 seconds)
MicrowavePowerforVariableCooking
Repetition Rate;
P-HI .................................................. Fullpowerthroughoutthecookingtime
P-90 ....................................................................approx. 90% of Full Power
P-80 ....................................................................approx. 80% of Full Power
P-70 ....................................................................approx. 70% of Full Power
P-60 ....................................................................approx. 60% of Full Power
P-50 ....................................................................approx. 50% of Full Power
P-40 ....................................................................approx. 40% of Full Power
P-30 ....................................................................approx. 30% of Full Power
P-20 ....................................................................approx. 20% of Full Power
P-10 ....................................................................approx. 10% of Full Power
P-0 ......................................................No powerthroughoutthecookingtime
MINUTE PLUS pad, Cook pads, Defrost pads, Number selection pads, Power
Levelpad,Timer/Clockpad,Stop/Clearpad,START pad,Reheatpads, and
Popcorn.
Oven Cavity Light Yes
SafetyStandard UL Listed FCC Authorized
DHHS Rules, CFR, Title 21, Subchapter J

5
R-401FK
R-401FW
a qualified electrician and have it replaced with a properly grounded
three-pronged wall receptacle or have a grounding adapter properly
groundedandpolarized.Iftheextensioncordmustbeused,itshouldbe
a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop
ortablewhereitcanbepulledonbychildrenortrippedoveraccidentally.
CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR RE-
MOVE THE ROUND GROUNDING PRONG FROM THIS
PLUG.
OVEN DIAGRAM
1. One touch door open button.
Push to open door.
2. Door latches.
The oven will not operate unless the
door is securely closed.
3. Removable turntable support.
4. Removable turntable.
The turntable will rotate clockwise or
counterclockwise.
5. Oven lamp.
It will light when oven is operating or
door is opened.
6. Oven door with see-through window.
7. Ventilation openings. (Rear)
8. Auto-Touch control panel.
9. Time display: Digital display, 99
minutes 99 seconds.
10.Wave guide cover.
11.Power supply cord
TOUCH CONTROL PANEL
3-Pronged
Plug
Grounded
Receptacle Box
Grounding Pin
3-Pronged Receptacle
NOTE:
The directed features are disa-
bled after one minute when the
ovenisnotin use.Thesefeatures
are automatically enabled when
the door is opened and closed or
theSTOP/CLEARpadispressed.
1
65
4
210
11
9
7
8
3
R-401FW

6
R-401FK
R-401FW
REF.NO. PARTNO. §
DESCRIPTION Q'TY CODE
PARTS LIST
Note: The parts marked "∆∆
∆∆
∆" may cause undue microwave exposure.
The parts marked "*" are used in voltage more than 250V. "§" MARK: PARTS DELIVERY SECTION.
∆
ELECTRICPARTS
1- 1 RC-QZA234WRE0 M High voltage capacitor 1 AP
1- 2 FH-DZB013MRY0 M High voltage rectifier assembly 1 AK
1- 3 QSOCLB006MRE0 M Oven lamp socket 1 AE
1-4RLMPTA081WRZZ MOven lamp 1AD
1- 5 RMOTEA346WRE0 M Fan motor 1 AR
1- 6 FFS-BA019/KIT M
Monitor switch (V-16G-2C25), C/T fuse (20A 250V AC) & Inst. 1AF
1- 7 QSW-MA085WRE0 M
Primary interlock switch and door sensing switch (V-5230Q) 2AE
1- 8 QFS-TA050WRZZ M C/T fuse 150OC 1AE
1- 9 QFS-TA014WRE0 M Cavity temperature fuse 150OC 1AF
1-10 RV-MZA305WRZZ M Magnetron 1 BB
1-11 RMOTDA211WRE0 M Turntable motor 1 AL
1-12 RTRN-B077MRE0 M Power transformer 1 AZ
1-13 FACCDB003MRE0 M Power supply cord 1 AM
CABINETPARTS
2-1GDAI-B068MRP0 MBase plate 1AN
2- 2 GLEGPB004MRF0 M Foot 4 AB
2- 3 GCABUB097MRP0 M Outer case cabinet [R-401FK] 1 AU
2- 3 GCABUB088MRP0 M Outer case cabinet [R-401FW] 1 AU
CONTROLPANELPARTS
3- 1 CPWBFB063MRU0 M Control unit 1 BA
3- 1A QCNCMA275DRE0 J 2-pin connector (CN-B) 1 AB
3- 1B FW-VZB194MRE0 M Lead wire harness (WH-1) 1 AG
C1 RC-KZA087DRE0 J Capacitor 0.1 uF 50V 1 AA
C2 VCEA0A1EW108M M Capacitor 1000 uF 25V 1 AB
C3 VCEA0A1AW227M M Capacitor 220 uF 10V 1 -
C21 VCEAB31VW106M J Capacitor 10 uF 35V 1 AA
D1-4 RH-DZA006PRE0 J Diode (1N4002) 4 AD
D20-22 VHD1SS270A/-1 J Diode (1SS270A) 3 AA
D40 VHD1SS270A/-1 J Diode (1SS270A) 1 AA
LD1-4 RH-PXA002DRZZ M Light emitting diode 4 -
Q21 VSKRC243M//-3 J Transistor (KRC243M) 1 AB
R1 VRD-B12HF561J J Resistor 560 ohm 1/2W 1 AA
RY1-2 RRLY-A114DRE0 J Relay (DU12D1-1PR(M)) 2 AN
SP1 RALM-A019DRZZ M Buzzer 1 -
T1 RTRNPA110DRE0 J Transformer 1 AP
VRS1 RH-VZA032DRE0 J Varistor (10G471K) 1 AE
ZD1 VHEHZ4C3///-1 J Zener diode (HZ4C3) 1 AA
3- 2 FPNLCB386/KIT M Control panel sub assembly [R-401FK] 1 AY
3- 2 FPNLCB387/KIT M Control panel sub assembly [R-401FW] 1 AY
3- 2-1 FUNTKB334/KIT M Key unit [R-401FK] 1 AN
3- 2-1 FUNTKB335/KIT M Key unit [R-401FW] 1 AN
3- 2-2 JBTN-B118MRF0 M Open button [R-401FK] 1 AD
3- 2-2 JBTN-B119MRF0 M Open button [R-401FW] 1 AE
3- 2-3 MSPRTA050WRE0 M Open button spring 1 AA
3- 3 PSHEPA798WREZ M LCD sheet 1 AG
3- 4 QCNC-B001MRE0 M Rubber connector 1 AD
3- 5 RLCDSA107DRZZ M Light crystal display 1 -
3- 6 XEPSD30P10XS0 M Screw; 3mm x 10mm 3 AB
OVENPARTS
4- 1 LBNDKB007MRP0 M H.V. Capacitor band 1 AB
4- 2 LANGTB060MRP0 M Chassis support 1 AD
4- 3 PHOK-B018MRF0 M Latch hook 1 AF
4- 4 MLEVPB016MRF0 M Switch lever 1 AD
4- 5 PDUC-B120MRF0A M Magnetron duct 1 AG
4- 6 NFANPB001MRE0 M Fan blade 1 AC
4- 7 PDUC-B088MRF0 M Fan duct 1 AC
4- 8 ------------- M Oven cavity (Not a replaceable part) 1 --
4- 9 PCOVPB073MRP0 M Waveguide cover 1 AC
4-10 PPACGB014MRF0 M Turntable motor packing 1 AA
4-11 PCUSGB033MRP0 M Cushion 1 AA

7
R-401FK
R-401FW
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.
REF. NO. PART NO. § DESCRIPTION Q'TY CODE
DOORPARTS
5 -1 FCOV-B202MRK0 M Door frame assembly [R-401FK] 1 AQ
5 -1 FCOV-B203MRK0 M Door frame assembly [R-401FW] 1 AQ
5 -2 LSTPPB021MRF0 M Latch head 1 AD
5 -3 MSPRTA046WRE0 M Latch spring 1 AB
5 -4 FDORFB062MRT0 M Door panel 1 AX
5- 5 PSHEPB021MRE0 M Sealer film 1 AD
5- 6 HPNL-B087MRE0 M Door screen 1 AK
5- 7 GCOVHB042MRF0 M Choke cover 1 AG
MISCELLANEOUS
6- 1 FW-VZB125MRE0 M Stop switch harness 1 AF
6- 2 FW-VZB192MRE0 M Main wire harnes 1 AU
6- 3 FROLPB025MRK0 M Turntable support 1 AN
6- 4 NTNT-A108WREZ M Turntable tray 1 AM
6- 5 TCAUAB045MRR0 M Monitor caution label 1 AA
6- 6 TCAUAB038MRR0 M DHHS/Screw caution label 1 AB
6- 7 TINSEB338MRK0 M Operation manual 1 AD
6- 8 QW-QZB016MRE0 M High voltage wire A 1 AC
SCREWS,NUTSANDWASHERS
7- 1 LX-BZA041WRE0 M Special screw 5 AA
7- 2 LX-CZ0052WRE0 M Special screw 2 AA
7- 3 XHTSD40P12RV0 M Screw : 4mm x 12mm 1 AA
7- 4 XOTSD40P12000 M Screw : 4mm x 12mm 8 AA
7- 5 XCBSD30P08000 M Screw : 3mm x 8mm 3 AA
7- 6 LX-CZA038WRE0 M Special screw 2 AA
7- 7 XHTSD40P08RV0 M Screw : 4mm x 8mm 3 AA
7- 8 LX-CZA070WRE0 M Special screw (Torx tamper proof screw) 2 AB

8
R-401FK
R-401FW
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
2-3
4-7
6-6
1-5
4-6
4-8
4-9
6-4
6-3
2-1
7-5
1-11
4-10
7-2
7-2
7-4
4-3
1-12
1-9
7-3
7-5
7-5
1-8
7-7
4-2
7-4
1-10
1-3
1-4
7-1
1-7
1-7
4-4
7-1
4-1
1-1
1-2
2-2
2-2
2-2
2-2
7-4
7-4
7-4
6-5
1-6
4-5
1-13
7-8
7-6
7-8
7-6
1-6
4-11