Sharp Carousel R-1405, Carousel R-1406 User manual

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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 the following parts may result in a
severe, possibly fatal, electrical shock. (High Voltage Capaci-
tor, High Voltage Power Transformer, Magnetron, High Volt-
age Rectifier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS Page
PRECAUTIONSTOBEOBSERVEDBEFOREANDDURINGSERVICINGTO
AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSIDEFRONTCOVER
BEFORESERVICING ...................................................................................................... INSIDEFRONTCOVER
WARNINGTOSERVICEPERSONNEL ................................................................................................................1
MICROWAVEMEASUREMENTPROCEDURE.....................................................................................................2
FOREWORDANDWARNING................................................................................................................................3
PRODUCTSPECIFICATIONS...............................................................................................................................4
GENERAL INFORMATION ...................................................................................................................................4
OPERATION .........................................................................................................................................................7
TROUBLESHOOTINGGUIDE .............................................................................................................................11
TESTPROCEDURE ............................................................................................................................................13
TOUCHCONTROLPANELASSEMBLY .............................................................................................................22
COMPONENTREPLACEMENTANDADJUSTMENTPROCEDURE ..................................................................26
PICTORIALDIAGRAM ........................................................................................................................................34
POWERUNITCIRCUIT.......................................................................................................................................35
LSIUNITCIRCUIT...............................................................................................................................................36
PRINTEDWIRINGBOARD .................................................................................................................................37
PARTS LIST........................................................................................................................................................38
PACKINGANDACCESSORIES .........................................................................................................................40
S92M198R1405E
R-1405
R-1406
OVER THE RANGE
MICROWAVE OVEN
MODELS
SERVICE MANUAL
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-1405

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R-1406
PRECAUTIONS TO BE OBSERVED BEFORE AND
DURING SERVICING TO AVOID POSSIBLE EXPO-
SURE 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
microwavesource,andmakerepairsasnecessary:(1)interlockoperation,(2)properdoorclosing,(3)seal
andsealingsurfaces(arcing,wear,andother damage),(4)damage toorloosening ofhingesand 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
andtransmissionsystemsshallberepaired,replaced,oradjustedbyproceduresdescribedinthismanual
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 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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WARNINGTO 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 isthe connecting leadofthe high-
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 these 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. Reconnect thepowersupplycord after the outer case 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. Reconnect thepowersupplycord after the outer case 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.Whenthetwominuteshaselapsed(timeratzero)
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 microwave leakage test should be carried out.
Don't Touch !
Danger High Voltage

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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,and thereafter(through theuseful lifeof theoven), 5mW/cm2atanypoint5cmormore fromthe external
surface of the oven.
2) Safety interlock switches: Primary interlock 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/cm2at 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:
Surveyinstruments that comply with therequirementfor instrumentation as prescribed bytheperformance 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±5½C (68½F) in the center of the oven cavity.
The water container shall be a low form of 600 ml (20 oz) beaker with an inside diameter of approx. 8.5 cm (3-1/2 in.)
and made of an electrically nonconductive material such as glass or plastic.
Theplacingof this standard load in the oven is important not only to protect the oven, but also to insure that any leakage
is measured accurately.
4) Set the cooking control on Full Power Cooking Mode
5) Close the door and select a cook cycle of several minutes. If the water begins to boil before the survey is completed,
replace it with 275 ml of cool water.
C. Leakage test:
Closed-door leakage test (microwave measurement)
1) Grasptheprobeofthesurveyinstrumentandholditperpendiculartothegapbetweenthedoorandthebodyoftheoven.
2) Move the probe slowly, not faster than 1 in./sec. (2.5 cm/sec.) along the gap, watching for the maximum indication on
the meter.
3) Checkforleakageatthedoorscreen,sheetmetalseamsandotheraccessiblepositionswherethecontinuityofthemetal
has been breached (eg., around the switches, indicator, and vents).
Whiletestingforleakagearoundthedoorpullthedoorawayfromthefrontoftheovenasfarasispermittedbytheclosed
latch assembly.
4) Measure carefully at the point of highest leakage and make sure that the highest leakage is no greater than 4mW/cm2,
and that the primary interlock switch does turn the oven OFF before any door movement.
NOTE: After servicing, record data on service invoice and microwave leakage report.

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SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH,
NEW JERSEY 07430-2135
SERVICE MANUAL
OVER THE RANGE
MICROWAVEOVEN
R-1405/R-1406
FOREWORD
This Manual has been prepared to provide Sharp Electronics Corp.
Service Personnel with Operation and Service Information for the
SHARP OVER THE RANGE MICROWAVE OVEN, R-1405 and R-
1406.
Itisrecommendedthatservicepersonnelcarefullystudytheentiretext
of this manual so 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
radiationhazard.
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 not any other visible damage with the oven.
Servicing and repair work must be carried out only by trained service
personnel. DANGER
Certaininitialpartsareintentionallynotgroundedandpresent
a risk of electrical shock only during servicing. Service
personnel - Do not contact the following parts while the
applianceisenergized;
HighVoltageCapacitor,PowerTransformer,Magnetron,High
VoltageRectifierAssembly, HighVoltageHarness;
If provided, Vent Hood, Fan assembly, Cooling Fan Motor.
Allthepartsmarked“*”onpartslistareusedatvoltagesmorethan
250V.
Removal of the outer wrap gives access to voltage above 250V.
Allthepartsmarked“Дonpartslistmaycauseunduemicrowave
exposure,bythemselves,orwhentheyaredamaged,loosenedor
removed.
PRODUCTDESCRIPTION
GENERALINFORMATION
OPERATION
TROUBLESHOOTINGGUIDEAND
TESTPROCEDURE
TOUCHCONTROLPANEL
COMPONENTREPLACEMENT
ANDADJUSTMENTPROCEDURE
WIRINGDIAGRAM
PARTS LIST

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ITEM DESCRIPTION
PowerRequirements 120 Volts / 13.5 Amperes
60Hertz
Singlephase,3wiregrounded
PowerOutput 950watts (IECTEST PROCEDURE)
Operatingfrequencyof2450MHz
CaseDimensions Width 29-15/16"
Height 15-9/16"
Depth 16-1/4"
CookingCavityDimensions Width 17-1/2"
Height 14-15/16"
1.5 Cubic Feet Depth 9-7/8"
Hoodlamp 2 bulbs, 20W x 2, Incandescent light bulbs
Hoodfan Approx. 300 C.F.M.
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 ......................................................Nopowerthroughoutthecookingtime
KEEP WARM pad, POPCORN pad, HOT WATER pad
REHEAT CENTER pads, COOK CENTER pads
DEFROST CENTER pads, Number selection pads
POWER LEVEL pad, TIMER / CLOCK pad
LIGHT button, FAN button,
STOP/CLEAR button, START/ MINUTE PLUS button,
Oven Cavity Light 20W x 1 Incandescent light bulb
SafetyStandard UL Listed FCC Authorized
DHHS Rules, CFR, Title 21, Chapter 1, Subchapter J
Weight Approx. 55 lbs.
PRODUCT SPECIFICATION
GENERAL INFORMATION
GROUNDING INSTRUCTIONS
Thisovenisequippedwithathreepronggroundingplug.Itmustbepluggedintoawallreceptaclethatisproperlyinstalledand
groundedin accordance withthe National ElectricalCodeand local codesandordinances.
Intheeventofanelectricalshortcircuit,groundingreducestheriskofelectricshockbyprovidinganescapewirefortheelectric
current.
WARNING: Improper use of the grounding plug can result in a risk of electric shock.

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ElectricalRequirements
The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE
GROUNDINGPINFROMTHEPLUG.
Thepowersupplycordandplugmustbeconnectedtoaseparate120VoltAC,60Hz,15Amp.ormorededicatedline,using
agroundedreceptacle.ThereceptacleshouldbelocatedinsidethecabinetdirectlyabovetheMicrowaveOven/Hoodsystem
mountinglocation.
1. Ovendoorwithsee-throughwindow.
2. Doorhinges.
3. Waveguidecover.
4. Turntablemotorshaft.
5. Ovenlamp.
Itwilllightwhenovenisoperatingordoorisopen.
6. Doorlatches.
The oven will not operate unless the door is
securely closed.
7. Onetouchdooropenbutton.
8. AutoTouchcontrolpanel
9. Time display: Digital display, 99 minutes 99
seconds.
10.Ventilationopenings.
11.LightCover.
12.Greasefilters.
13.Removableturntable.
The turntable will rotate clockwise or
counterclockwise.
Onlyremove for cleaning.
14.Removableturntablesupport.
15.Power supply cord
OVEN DIAGRAM
3-Pronged Plug
Grounded
Receptacle Box
Grounding Pin
3-Pronged Receptacle
14
7
3
4
5
10
2
1
6
11
12
15
9
8
13
10
10

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NOTE: Some one-touch cooking features such as "MINUTE PLUS" are disabled after three minutes when the oven is not
used. These features are automatically enabled when the door is opened and closed or STOP/CLEAR button is
pressed.
CONTROL PANEL

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OPERATION
DESCRIPTION OF OPERATING SEQUENCE
Thefollowingisadescriptionofcomponentfunctionsduring
ovenoperation.
OFF CONDITION
Closing the door activates the door sensing switch and
primaryinterlockswitch.(Inthiscondition,themonitorswitch
contactsareopened.)
When oven is plugged in, 120 volts A.C. is supplied to the
controlunit.(FigureO-1).
1. The display will show flashing "88 : 88".
To set any program or set the clock, you must first
touch the STOP/CLEAR button. The display will clear,
and " : " will appear .
COOKING CONDITION
ProgramdesiredcookingtimetouchingtheNUMBERpads.
WhentheSTARTbuttonistouched,thefollowingoperations
occur:
1. The contacts of relays are closed and components
connected to the relays are turned on as follows.
(Fordetails, referto FigureO-2)
RELAY CONNECTEDCOMPONENTS
RY1 Oven lamp / Fan motor / Turntable motor
RY2 Powertransformer
RY3,RY4 Hoodfanmotor
RY5,RY6 Hoodlamp
2. 120 volts A.C. is supplied to the primary winding of the
powertransformerandisconvertedtoabout3.3voltsA.C.
output on the filament winding, and approximately 2000
volts A.C. on the high voltage winding.
3. Thefilamentwindingvoltageheatsthemagnetronfilament
andtheH.V.windingvoltageis senttoa voltagedoubler
circuit.
4. The microwave energy produced by the magnetron is
channelled through the waveguide into the cavity feed-
box, and then into the cavity where the food is placed to
becooked.
5. Upon completion of the cooking time, the power
transformer, oven lamp, etc. are turned off, and the
generationofmicrowaveenergyisstopped.Theovenwill
revert to the OFF condition.
6. When the door is opened during a cook cycle, monitor
switch, door sensing switch, primary interlock switch,
relay (RY1) and secondary interlock relay (RY2) are
activated with the following results. The circuits to the
cooling fan motor, the turntable motor, and the high
voltage components are de-energized, the oven lamp
remainson,andthedigitalread-outdisplaysthetimestill
remaining in the cook cycle when the door was opened.
7. Themonitorswitchiselectricallymonitoringtheoperation
of the primary interlock switch and secondary interlock
relay(RY2)andismechanicallyassociatedwiththedoor
so that it will function in the following sequence.
(1) When the door opens from a closed position, the
secondaryinterlockrelay(RY2)andprimaryinterlock
switchopentheir contacts.Andcontactsoftherelay
(RY1) remains closed. Then the monitor switch
contacts close.
(2) When the door is closed from the open position, the
monitor switch contacts first open, and then the
contacts of the primary interlock switch and door
sensingswitchclose.Andcontactsoftherelay(RY1)
open.
Iftheprimaryinterlockswitchand secondaryinterlockrelay
(RY2)failwiththeircontactsclosedwhenthedoorisopened,
the closing of the monitor switch contacts will form a short
circuit through the monitor fuse, primary interlock switch,
relay(RY1)andsecondaryinterlockrelay(RY2),causingthe
monitor fuse to blow.
POWER LEVEL P-0 TO P-90 COOKING
WhenVariableCookingPowerisprogrammed,the120volts
A.C. is supplied to the power transformer intermittently
throughthecontactsofrelay(RY2)whichisoperatedbythe
controlunitwithin an interval second time base. Microwave
poweroperation is as follows:
VARI-MODE ON TIME OFF TIME
Power10(P-HI) 32 sec. 0 sec.
(100%power)
Power9(P-90) 30 sec. 2 sec.
(approx.90%power)
Power8(P-80) 26 sec. 6 sec.
(approx.80%power)
Power7(P-70) 24 sec. 8 sec.
(approx.70%power)
Power6(P-60) 22 sec. 10 sec.
(approx.60%power)
Power5(P-50) 18 sec. 14 sec.
(approx.50%power)
Power4(P-40) 16 sec. 16 sec.
(approx.40%power)
Power3(P-30) 12 sec. 20 sec.
(approx.30%power)
Power2(P-20) 8 sec. 24 sec.
(approx.20%power)
Power1(P-10) 6 sec. 26 sec.
(approx.10%power)
Power0(P-0) 0 sec. 32 sec.
(0%power)
Note: TheON/OFFtimeratiodoesnotcorrespondwiththe
percentageofmicrowavepower,becauseapprox.3
seconds are needed for heating of the magnetron
filament.

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VENTILATION METHODS HOT AIR EXHAUST
1. VERTICALVENTING
Forthisventingmethod,hotairrisingfromtheconventional
rangebelowisdrawninbythehoodfanmotorthroughthe
greasefiltersattherightandleftsidesofthebasecover,
upthroughtherightandleftsidesoftheovencavity,then
discharged vertically at rear center top of the oven, into
the customer's vent system.
2. HORIZONTALVENTING
The air handing is the same as VERTICAL VENTING
exceptthatthefinalairdischargeisdirectedhorizontally
outfromthetoprearoftheovenintothecustomer'svent
system.
3. RE-CIRCULATION(INSIDEVENTING)
The air handing is the same as VERTICAL VENTING
exceptthatthefinalairdischargeisdirectedhorizontally
through theupperfrontoftheovenintothekitchen.INthis
case, the accessory charcoal filter RK-240 must be
provided to filter the air before it leaves the oven.
To Duct
To Duct
Grease
Filter
Hood
Intake
Duct R
Hood Fan
Motor
Grease
Filter
To Duct
Hood
Intake
Duct R
Hood Fan
Motor
Hood
Intake
Duct R
Hood Exhaust
Louver
Hood Fan
Motor
Charcoal
Filter

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SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. COOKING TIME PROGRAMMED.
3. VARIABLECOOKINGCONTROL"HIGH".
4. "START" BUTTON PRESSED.
Figure O-2. Oven Schematic-Cooking Condition
Figure O-1. Oven Schematic-Off Condition
SCHEMATIC
NOTE: CONDITION OF OVEN
1. DOOR CLOSED.
2. CLOCK APPEARS ON DISPLAY.
NOTE: " " indicates components with potential above 250V.
FUSE
20A
CAVITY
THERMAL
CUTOUT
120VAC
60Hz
HOOD FAN
THERMAL
CUT OUT
RED
PPL
COM.
RED
RED
ORG
BLK
WHT
WHT
WHT
GRY
BRN
WHT
WHT
RED
RED
WHT
WHT
YLW
YLW
BLK
WHT
ORG
GRN
A5
B3
A1 A3 B1 N.O.
E2
E1
RY4
HOOD
MOTOR
CONTROL UNIT
MAGNETRON
TEMPERATURE
FUSE
N.O.
(RY1)
(RY2)
COM.
DOOR
SENSING
SWITCH
TTM FMOL
HL
HL
TURN
TABLE
MOTOR
FAN
MOTOR
OVEN
LAMP
HOOD
LAMP
GRY
MONITOR
SWITCH
PRIMARY
INTERLOCK
SWITCH
RED
BLU
POWER
TRANSFORMER
MAGNETRON
HIGH
VOLTAGE
CAPACITOR
xx uF
HOOD
CAPACITOR
ORG
BRN
WHT
SECONDARY
INTERLOCK
RELAY
OVEN LAMP
RELAY
ORG
BLK
ORG
RED
RED
BLK
RED
RED
ORG
PPL
BLU
WHT
RY5
GRY
BLK
BLK
WHT
WHT
WHT
GRY
GND
BRN
WHT
F1
F2
F3
AH SENSOR
BRN
FUSE
20A
CAVITY
THERMAL
CUTOUT
120VAC
60Hz
HOOD FAN
THERMAL
CUT OUT
RED
PPL
COM.
RED
RED
ORG
BLK
WHT
WHT
WHT
GRY
BRN
WHT
WHT
RED
RED
WHT
WHT
YLW
YLW
BLK
WHT
ORG
GRN
A5
B3
A1 A3 B1 N.O.
E2
E1
RY4
HOOD
MOTOR
CONTROL UNIT
MAGNETRON
TEMPERATURE
FUSE
N.O.
(RY1)
(RY2)
COM.
DOOR
SENSING
SWITCH
TTM FMOL
HL
HL
TURN
TABLE
MOTOR
FAN
MOTOR
OVEN
LAMP
HOOD
LAMP
GRY
MONITOR
SWITCH
PRIMARY
INTERLOCK
SWITCH
RED
BLU
POWER
TRANSFORMER
MAGNETRON
HIGH
VOLTAGE
CAPACITOR
xx uF
HOOD
CAPACITOR
ORG
BRN
WHT
SECONDARY
INTERLOCK
RELAY
OVEN LAMP
RELAY
ORG
BLK
ORG
RED
RED
BLK
RED
RED
ORG
PPL
BLU
WHT
RY5
GRY
BLK
BLK
WHT
WHT
WHT
GRY
GND
BRN
WHT
F1
F2
F3
AH SENSOR
BRN

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DESCRIPTION AND FUNCTION OF COMPONENTS
3. If the door is opened, and the secondary interlock relay
(RY2)and primary interlock switch contacts failtoopen,
themonitorfuseblowssimultaneouslywithclosingofthe
monitor switch contacts.
CAUTION: BEFORE REPLACING A BLOWN MONITOR
FUSE TEST THE DOOR SENSING SWITCH,
SECONDARY INTERLOCK RELAY (RY2),
RELAY(RY1),PRIMARYINTERLOCKSWITCH
AND MONITOR SWITCH FOR PROPER OP-
ERATION.(REFERTOCHAPTER"TESTPRO-
CEDURE").
NOTE: MONITORFUSEANDSWITCH AREREPLACED
AS AN ASSEMBLY
TEMPERATURE FUSE (MG)
The temperature fuse located on the fan duct assembly is
designed to prevent damage to the magnetron if an over
heated condition develops in the tube due to cooling fan
failure, obstructed air guide, dirty or blocked air intake, etc.
Undernormaloperation,thetemperaturefuseremainsclosed.
However,thetemperaturefusewillopenat302½F(150½C)
causing the oven to shut down.
NOTE: This is a fuse. It does not reset.
THERMAL CUT-OUT (HOOD )
This thermal cut-out located on the right base plate flange
(turntablemotorside).Itisdesignedtoautomaticallyturnon
the hood fan motor whenever the hot air rising from the
conventional range below causes the temperature at the
thermal cut-out to rise to 140½F (60½C) or higher, thus
removingthishotairfromaroundmicrowaveoven.Whenthe
temperature around the thermal cut-out drops to 113½F
(45½C) or lower, the thermal cut-out shuts off the hood fan
motor.
THERMAL CUT-OUT (CAVITY )
This thermal cut-out is located on the bottom of the oven
cavity.Itisdesignedtopreventdamagetotheovenunitifthe
foodintheovencatchesfireduetooverheatingproducedby
improper setting of cooking time or failure of control unit.
Undernormaloperation,thethermalcut-out remainsclosed.
However, the thermal cut-out will open at 293½F (145½C)
causingtheoventoshutdown.Thedefectivethermalcut-out
must be replaced with a new one.
TURNTABLE MOTOR
The turntable motor rotates the turntable located on the
bottomof the oven cavity, so thatthefoods on the turntable
cook evenly during cooking. Turntable will turn in either
direction.Theturntablemotor canbe turnedoff bytouching
TURNTABLEON/OFFpad.
COOLING FAN MOTOR
The cooling fan motor drives a blade which draws external
cool air. This cool air is directed through the air vanes
surroundingthemagnetronandcoolsthemagnetron.Thisair
is channelled through the oven cavity to remove steam and
DOOR OPEN MECHANISM
Thedoorisopenedbypushingtheopenbuttononthecontrol
panel,refer to the FigureD-1.
Whentheopenbuttonispushed,theopenbuttonpushesup
theopen lever, andthen the open leverpushes up thelatch
head.Thelatchheadsaremovedupwardandreleasedfrom
latch hook. Now the door will open.
FigureD-1. Door OpenMechanism
DOOR SENSING AND PRIMARY INTERLOCK
SWITCHES
The primary interlock switch is mounted in the lower posi-
tion of the latch hook and the door sensing switch in the
secondary interlock system is mounted in the upper posi-
tionofthelatchhook.They areactivated bythe latchheads
onthedoor.Whenthedoorisopened,theswitchesinterrupt
the circuit to all components. A cook cycle cannot take
place until the door is firmly closed thereby activating both
interlock switches. The secondary interlock system con-
sists of the door sensing switch and secondary interlock
relay located on the control circuit board.
MONITOR SWITCH
Themonitorswitchisactivated(thecontactsopened)bythe
latchheadonthedoorwhilethedoorisclosed.Theswitchis
intendedtorendertheoveninoperativebymeansofblowing
themonitorfusewhenthecontactsofthesecondaryinterlock
relay(RY2)andprimaryinterlockswitchfailtoopenwhenthe
doorisopened.
Functions:
1. When the door is opened, the monitor switch contact
close (to the ON condition) due to their being normally
closed. At this time the secondary interlock relay (RY2)
and primary interlock switch are in the OFF condition
(contactsopen)duetotheirbeingnormallyopencontact
switches. And the contacts of relay (RY1) are in the ON
condition (contacts close).
2. Asthedoorgoestoaclosedposition,themonitorswitch
contactsarefirstopenedandthenthedoorsensingswitch
and the primary interlock switch contacts close. (On
opening the door, each of these switches operate
inversely.)
Latch hook
Door sensing
switch
Latch heads
Monitor switch
Primary interlock switch
Open lever
Door

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TROUBLESHOOTING GUIDE
Nevertouch anypartin thecircuitwithyour handoran uninsulatedtoolwhilethe powersupplyisconnected.
Whentroubleshootingthe microwaveoven,itishelpful tofollowtheSequenceof Operationinperformingthechecks. Many
ofthepossiblecausesoftroublewillrequirethataspecifictestbeperformed.Thesetestsaregivenaprocedureletterwhich
will be found in the "Test Procedure "section.
IMPORTANT: If the oven becomes inoperative because of a blown monitor fuse, check the monitor switch, relay (RY1)
secondary interlock relay (RY2), door sensing switch and primary interlock switch before replacing the
monitor fuse. If monitor fuse is replaced, the monitor switch must also be replaced. Use part FFS-BA016/
KiT as an assembly.
IMPORTANT: Whenever troubleshooting is performed with the power supply cord disconnected. It may in, some cases,
be necessary to connect the power supply cord 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. Ensurethattheleadsremainisolatedfromother componentsandoven chassisbyusinginsulationtape.
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. Reconnect the power supply cord after the outer case is installed.
7. Run the oven and check all functions.
vapors given off from the heating foods. It is then exhausted
through the exhausting air vents at the oven cavity.
HOOD FAN MOTOR
Thehoodfanmotorisaone-speed,single-phase,doublepole
induction type, requiring a hood fan capacitor. It is located
outside the upper rear part of the oven cavity, is to remove,
from around the oven, hot air rising from the conventional
electricorgasrangeoverwhichitisinstalled.Thisairisthen
expelledeitherverticallyorhorizontallythroughthecustomer
supplied duct system, or discharged back into the kitchen.
HOOD LAMP
Thehoodlampsaremountedatthehoodlampangleonthe
base cover. The hood lamps can be turned off and on by
touchingthe LIGHTbutton.

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CK = Check / RE = Replace
POSSIBLE CASE AND DEFECTIVE PARTS
PROBLEM
TEST PROCEDURE
CONDITION
OFF
CONDITION
IDLE
CONDITION
MICROWAVE
COOKING
CONDITION
Home fuse blows when power cord is plugged into wall receptacle.
Monitor fuse blows when power cord is plugged into wall receptacle.
Display does not illuminate when power cord is first plugged into wall
receptacle.
Display does not operate properly when STOP/CLEAR button is touched.
(The time of day should appear on the display with beep sound during
normal condition.)
Oven lamp does not light with door is opened.
Hood fan motor operates when power cord is first plugged into wall
receptacle.
Temperature of oven base seems more than 140ûF (60ûC) because of
operation of the range below. But hood fan motor does not turn on
automatically. (Normally, food fan motor should be operating at low
speed.)
Hood lights do not turn on when LIGHT button is pressed.
Hood fan motor does not rotate at all with touched FAN button.
Oven lamp does not light in cook cycle. (But it does light when door is
opened.)
Fan motor does not operate. (Oven lamp and turntable motor operate.)
Turntable motor does not operate (Oven lamp lights and fan motor
operate.)
Oven does not go into cook cycle when START button is touched
Oven seems to be operating but little or no heat is produced in oven load.
(Food incompletely cooked or not cooked at all at end of cook cycle.)
Oven goes into a cook cycle but extremely uneven heating is produced in
oven load (food).
Variable cooking does not operate properly except Cooking Power 10 (P-
HI) mode.
Function of DEFROST CENTER does not operate properly.
Oven goes into DEFROST CENTER but food is not defrosted well.
CK LOW VOLTAGE CK NO POWER AT OUTLET
RE SHORT IN POWER CORD
CK OPENED OR SHORTED WIRING CK HOOD MOTOR CAPACITOR RE HOOD LAMP OR SOCKET RE TURNTABLE MOTOR RE FAN MOTOR RE OVEN LAMP OR SOCKET P FOIL PATERN ON P.W.B. O DEFROST CENTER N RELAYS (RY-5), (TY6) N RELAY (RY-4) N RELAY (RY-3) N RELAY (RY-2) N RELAY (RY-1) M KEY UNIT L CONTROL UNIT K HOOD FAN MOTOR J HOOD HERMAL CUT-OUT I MONITOR FUSE H MONITOR SWITCH G
SECONDARY INTERLOCK SYSTEM
F PRIMARY INTERLOCK SWITCH
E
TEMPERATURE FUSE OR THERMAL CUT-OUT
D HIGH VOLTAGE CAPACITOR C H.V. RECTIFIER B POWER TRANSFORMER A MAGNETRON

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BPOWER TRANSFORMER TEST
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check
across the magnetron filament leads should indicate less than 1 ohm.
5. Totestforashortedmagnetron,connecttheohmmeterleadsbetweenthemagnetronfilamentleads
and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance
themagnetronis groundedandmust bereplaced.
6. Reconnectall leadsremovedfrom components duringtesting.
7. Reinstallthe outer case(cabinet).
8. Reconnect the power supply cord after the outer case is installed.
9. Run the oven and check all functions.
MICROWAVE OUTPUT POWER
Thefollowingtestprocedureshouldbecarriedoutwiththemicrowaveoveninafullyassembledcondition
(outer case fitted).
HIGHVOLTAGESAREPRESENTDURINGTHECOOKCYCLE,SOEXTREMECAUTIONSHOULDBE
OBSERVED.
Power output of the magnetron can be measured by performing a water temperature rise test. This test
shouldonlybeusedifabovetestsdonotindicateafaultymagnetronandthereisnodefectinthefollowing
componentsorwiring:siliconrectifier,highvoltagecapacitorandpowertransformer.Thistestwillrequire
a 16 ounce (453cc) measuring cup and an accurate mercury thermometer or thermocouple type
temperaturetester. For accurate results, the following procedure must be followed carefully:
1. Fillthemeasuringcupwith16oz.(453cc)oftapwaterandmeasurethetemperatureofthewaterwith
athermometerorthermocoupletemperaturetester.Stirthethermometerorthermocouplethroughthe
wateruntil the temperature stabilizes. Record the temperatureofthewater.
2. Placethecupofwaterintheoven.OperateovenatPOWER10(HIGH)selectingmorethan60seconds
cooktime.Allowthewatertoheatfor60seconds,measuringwithastopwatch,secondhandofawatch
orthedigitalread-outcountdown.
3. Removethecupfromtheovenandagainmeasurethetemperature,makingsuretostirthethermometer
orthermocouplethroughthewateruntilthemaximumtemperatureisrecorded.
4. Subtractthecoldwatertemperaturefromthehotwatertemperature.Thenormalresultshouldbe29.2
to54.2½F(16.2to30.1½C)riseintemperature.Ifthewatertemperaturesareaccuratelymeasuredand
testedfortherequiredtimeperiodthetestresultswillindicateifthemagnetrontubehaslowpoweroutput
(lowriseinwatertemperature)whichwouldextendcookingtimeorhighpoweroutput(highriseinwater
temperature)whichwouldreducecookingtime.Becausecookingtimecanbeadjustedtocompensate
forpoweroutput,themagnetrontubeassemblyshouldbereplacedonlyifthewatertemperaturerise
testindicatesapoweroutputwellbeyondthenormallimits.Thetestisonlyaccurateifthepowersupply
line voltage is 120 volts and the oven cavity is clean.
AMAGNETRON ASSEMBLY TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Disconnect the primary input terminals and measure the resistance of the transformer with an
ohmmeter. Check for continuity of the coils with an ohmmeter. On the R x 1 scale, the resistance of
the primary coil should be less than 1 ohm and the resistance of the high voltage coil should be
approximately 83 ohms; the resistance of the filament coil should be less than 1 ohm.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.

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TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Ifthecapacitorisopen,nohighvoltagewillbeavailabletothemagnetron.Disconnectinputleadsand
check for short or open between the terminals using an ohmmeter.
Checkingwithahighohmscale,ifthehighvoltagecapacitorisnormal,themeterwillindicatecontinuity
for a short time and should indicate an open circuit once the capacitor is charged. If the above is not
thecase,check the capacitor with an ohmmeter to see if it is shorted between either of the terminals
and case. If it is shorted, replace the capacitor.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
DHIGH VOLTAGE CAPACITOR TEST
ECAVITY THERMAL CUT-OUT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the
temperatureofthethermalcut-outreachesapproximately293½F(145½C).
An open thermal cut-out indicates overheating of the oven, exchange the oven thermal cut-out and
checkinsideofovencavityandforimpropersettingofcookingtimeoroperationofcontrolunit.Check
forrestrictedairflowthroughtheventholesoftheovencavity,especiallythecoolingfanandairguide.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
MAGNETRON TEMPERATURE FUSE TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. A continuity check across the temperature fuse terminals should indicate a closed circuit. If the
temperatureofthemagnetronreachesapproximately302½F(150½C),thetemperaturefuseopens.An
open temperature fuse indicates overheating of the magnetron. Check for restricted air flow to the
magnetron,especiallythecoolingfanairguide.
5. Reconnectall leadsremovedfrom components duringtesting.
CHIGH VOLTAGE RECTIFIER TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Isolatetherectifierfromthecircuit.Usingthehighestohmscaleofthemeter,readtheresistanceacross
theterminalsandobserve,reversetheleadstotherectifierterminalsandobservemeterreading.Ifa
short is indicated in both directions, or if an infinite resistance is read in both directions, the rectifier
isprobablydefective and should be replaced.
5. Reconnectall leads removedfromcomponents during testing.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOTE:Besure to useanohmmeter that will supplya forward bias voltageofmore than 6.3volts.
(HIGHVOLTAGESAREPRESENT ATTHE HIGHVOLTAGE TERMINAL,SO DONOT ATTEMPTTO
MEASURETHE FILAMENT AND HIGH VOLTAGE.)

15
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TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Before performing this test, make sure that the primary interlock switch and the secondary interlock
relay are operating properly, according to the above Switch and Interlock system Test Procedures.
Disconnectthewireleadfromthemonitorswitch(COM)terminal.Checkthemonitorswitchoperation
byusing the ohmmeter asfollows. When the doorisopen, the meter shouldindicatea closed circuit.
Whenthemonitorswitchactuatorispushedbyascrewdriverthroughthelowerlatchholeonthefront
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
CAUTION: IF THE THERMALCUT-OUTORTEMPERATUREFUSE INDICATESAN OPENCIRCUIT
ATROOMTEMPERATURE,REPLACETHERMALCUT-OUTORTEMPERATUREFUSE.
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Isolatetheswitchandconnecttheohmmetertothecommon(COM.)andnormallyopen(NO)terminal
of the switch. The meter should indicate an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the secondary interlock switch.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
FPRIMARY INTERLOCK SWITCH TEST
HMONITOR SWITCH TEST
GSECONDARY INTERLOCK SYSTEM TEST
DOORSENSINGSWITCH
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Isolatetheswitchandconnecttheohmmetertothecommon(COM.)andnormallyopen(NO)terminal
of the switch. The meter should indicate an open circuit with the door open and a closed circuit with
the door closed. If improper operation is indicated, replace the door sensing switch.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
NOTE: Ifthedoorsensingswitchcontactsfailintheopenpositionandthedoorisclosed,thecoolingfan
motor, stirrer motor and oven light will be activated by RY1.
SECONDARYINTERLOCKRELAY(RY2)
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Disconnecttwo(2)wireleadsfromthemaletabterminalsoftheSecondaryInterlockRelay.Checkthe
stateoftherelaycontactsusingaohmmeter.Therelaycontactsshouldbeopen.Iftherelaycontacts
are closed, replace the circuit board entirely or the relay itself.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.

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IBLOWN MONITOR FUSE TEST
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. If the monitor fuse is blown when the door is opened, check the secondary interlock relay, primary
interlockswitchandmonitorswitchaccordingtothe"TESTPROCEDURE"forthoseswitchesbefore
replacingtheblownmonitorfuse.
CAUTION: BEFOREREPLACINGABLOWNMONITORFUSE,TESTTHESECONDARYINTERLOCK
RELAY, PRIMARY INTERLOCK SWITCH, DOOR SENSING SWITCH AND MONITOR
SWITCHFORPROPEROPERATION.
If the monitor fuse is blown by improper switch operation, the monitor fuse and monitor switch must
bereplacedwith"monitorfuseandmonitorswitchassembly"partnumberFFS-BA016/KiT,evenifthe
monitorswitchoperatesnormally.Themonitorfuseandmonitorswitchassemblyiscomprisedofa20
ampere fuse and switch.
5. Reconnectall leadsremovedfrom components duringtesting.
6. Re-installthe outercase(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
plateoftheovencavitywiththedooropened(inthisconditiontheplungerofthemonitorswitchispushed
in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be
defective.Aftertestingthemonitorswitch,reconnectthewireleadtothemonitorswitch(COM)terminal
and check the continuity of the monitor circuit.
5. Reconnectallleadsremoved from
componentsduringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnectthepowersupply cordafter
the outer case is installed.
8. Run the oven and check all functions.
JHOOD THERMAL CUT-OUT TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. A continuity check across the thermal cut-out terminals should indicate an open circuit unless the
temperatureofthethermalcut-outreachesapproximately140½F(60½C)ormore.At thattemperature,
the contacts will close. The thermal cut-out opens automatically at approximately 113½F(45½C).
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
KHOOD FAN MOTOR TEST
1. Disconnect the power supply cord, and then remove outer case.
2. Open the door and block it open.
3. Dischargehighvoltagecapacitor.
4. Ifthemotordoesnotturn,touchtheFANbuttononceandcheckvoltagebetweenpins"1"and"2"(Blue
and Black wires) of the 6 pin connector. If 120 Volts appear and the hood capacitor is good, replace
the hood fan assembly. If 120 Volts does not appear, check the motor circuit. The resistance values
of motor terminals are as follows:
Primary
Interlock Switch Monitor Switch
Screw Driver
Ohmmeter
Red White/ White

17
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TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
Resistancebetween;
BLU(1) AND YLW (4) = 0Ω(Shorted)
BLK(2) AND YLW (4) = 60Ω
BLU(1) AND BLK (2) = 60Ω
RED(5) AND BLU (1) = 162Ω
RED(5) AND BLK (2) = 102Ω
YLW(4) AND RED (5) = 162Ω
6-PIN CONNECTOR
OF HOOD FAN MOTOR
5. Reconnectall leadsremovedfrom components duringtesting.
6. Reinstallthe outer case(cabinet).
7. Reconnect the power supply cord after the outer case is installed.
8. Run the oven and check all functions.
BLU BLK
YLW RED
1 2
4 5
60 Ω
102 Ω
HOOD FAN
CAPACITOR
YLW
RED
BLU
BLK
1
2
4
5
SUB
60 Hz
120 v
MAIN

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TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
LTOUCH CONTROL PANEL ASSEMBLY TEST
The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,
unlikeconventionalmicrowaveovens,propermaintenancecannotbeperformedwithonlyavoltmeterand
ohmmeter.Inthisservicemanual,thetouchcontrolpanelassemblyisdividedintotwounits,ControlUnit
and Key Unit, and also the Control Unit is divided into two units, LSI Unit and Power Unit, and
troubleshooting by unit replacement is described according to the symptoms indicated.
Beforetesting,
1) Disconnect the power supply cord, and then remove outer case. Refer to procedure of " HOOD
EXHAUST LOUVER REMOVAL ", " REMOVAL OF OVEN FROM WALL " and " OUTER CASE
REMOVAL ".
2) Open the door and block it open.
3) To discharge high voltage capacitor, wait for 60 seconds.
4) Removetwo(2)screwsholdingthehoodintakeductRtotheovencavitytopplateandthebaseplate
R. And remove the hood intake duct R.
5) Disconnect the leads to the primary of the power transformer.
6) Ensure that these leads remain isolated from other components and oven chassis by using
insulationtape.
1. Key Unit.
NOTE ;
1) Checkkey unitribbon connectionbefore replacement.
2) Reconnectallleads removed from componentsduring testing.
3) Re-install the hood intake duct R with two (2) screws.
4) Re-installtheouter case (cabinet).
5) Reconnect the power supply cord after the outer case is installed.
6) Run the oven and check all functions.
The following symptoms indicate a defective key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) Whentouchinga number pad,twofigures or moreare displayed.
c) When touching the pads, sometimes a pad produces no signal.
If the key unit is defective.
1) Disconnect the power supply cord, and then remove outer case.
2) Open the door and block it open.
3) To discharge high voltage capacitor, wait for 60 seconds.
4) Replace the key unit.
5) Reconnectallleads removed from componentsduring testing.
6) Re-installtheouter case (cabinet).
7) Reconnect the power supply cord after the outer case is installed.
8) Run the oven and check all functions.
2. ControlUnit.
The following symptoms indicate a defective control unit. Before replacing the control unit, perform
the Key unit test (Procedure M) to determine if control unit is faulty.
2-1 In connection with pads.
a) When touching the pads, a certain group of pads do not produce a signal.
b) When touching the pads, no pads produce a signal.
2-2 In connection with indicators
a) At a certain digit, all or some segments do not light up.
b) At a certain digit, brightness is low.
c) Only one indicator does not light.
d) The corresponding segments of all digits do not light up; or they continue to light up.
e) Wrongfigureappears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible problems caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clockdoesnotoperateproperly.
c) Cooking is not possible.