Sharp Carousel R-380E User manual

R-380E
39
SHARP CORPORATION
SERVICE MANUAL
S7107R380EPJ/
MICROWAVE OVEN
MODEL R-380E
In interests of user-safety the oven should be restored to its
original condition and only parts identical to those specified
should be used.
TABLE OF CONTENTS Page
CAUTION, MICROWAVE RADIATION............................................................................................................. 1
WARNING..........................................................................................................................................................1
PRODUCT SPECIFICATIONS ......................................................................................................................... 2
GENERAL INFORMATION................................................................................................................................2
APPEARANCE VIEW ....................................................................................................................................... 3
OPERATION SEQUENCE................................................................................................................................ 4
FUNCTION OF IMPORTANT COMPONENTS ................................................................................................ 6
SERVICING ...................................................................................................................................................... 7
TEST PROCEDURE......................................................................................................................................... 9
TOUCH CONTROL PANEL.............................................................................................................................16
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE........................................................... 21
MICROWAVE MEASUREMENT .................................................................................................................... 27
WIRING DIAGRAM......................................................................................................................................... 28
PICTORIAL DIAGRAM ................................................................................................................................... 29
POWER UNIT CIRCUIT ..................................................................................................................................30
CPU UNIT CIRCUIT ........................................................................................................................................31
PRINTED WIRING BOARD .............................................................................................................................32
PARTS LIST ................................................................................................................................................... 33
Info Display
INST
INST
ANT
ANT
COOK
COOK
STOP
STOP
CLEAR
CLEAR
ST
ST
ART
ART
TIMER
CLOCK
POWER
LEVEL
SLOW
COOK
SENSOR INSTANT REHEAT
SENSOR COOK
QUICK &
EASY
PIZZA
PIE
RICE
DINNER
PLATE
CASSEROLE
SOUP
VEETABLES
RICE/PASTA
MEATDESSERTS
HELP
EXPRESS
DEFROST
EASY
DEFROST
MORE
LESS

R-380E
40

R-380E
1
SERVICEMANUAL
MICROWAVE OVEN
R-380E
GENERAL IMPORTANT INFORMATION
ThisManualhasbeenpreparedtoprovideSharpCorp.Service
engineers with Operation and Service Information.
It is recommended that service engineers carefully study the
entire text of this manual, so they will be qualified to render
satisfactory customer service.
CAUTION
MICROWAVE RADIATION
DO NOT BECOME EXPOSED TO RADIATION FROM
THE MICROWAVE GENERATOR OR OTHER PARTS
CONDUCTING MICROWAVE ENERGY.
Serviceengineers shouldnot beexposed tothe microwave
energy which may radiate from the magnetron or other
microwave generating devices if it is improperly used or
connected. All input and output microwave connections,
waveguides, flanges and gaskets must be secured. Never
operate the device without a microwave energy absorbing
load attached. Never look into an open waveguide or
antenna while the device is energized.
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 engineers.
All the parts marked "*" on parts list are used at voltages more
than 250V.
Removal of the outer wrap gives access to potentials above
250V.
All the parts marked "∆" on parts list may cause undue micro-
wave exposure, by themselves, or when they are damaged,
loosened or removed.
SHARP CORPORATION
OSAKA, JAPAN
PRODUCT SPECIFICATIONS
APPEARANCE VIEW
OPERATING SEQUENCE
FUNCTION OF IMPORTANT
COMPONENTS
SERVICING AND
TROUBLESHOOTING CHART
TEST PROCEDURE
TOUCH CONTROL PANEL
ASSEMBLY
COMPONENT REPLACEMENT
AND ADJUSTMENT PROCEDURE
MICROWAVE MEASUREMENT
WIRING DIAGRAM
PARTS LIST

R-380E
2
ITEM DESCRIPTION
Power Requirements 230 - 240 Volts
50 Hertz
Single phase, 3 wire earthed
Power Consumption 1.7kW
Power Output 1150 watts nominal of RF microwave energy (IEC Test Procedure)
Operating frequency 2450 MHz
Case Dimensions Width 520 mm
Height 302 mm including foot
Depth 436 mm
Cooking Cavity Dimensions Width 374 mm
Height 227 mm
Depth 399 mm
Turntable diameter 335 mm
Control Complement Touch Control System
Clock ( 1:00 - 12:59)
Timer (0 - 99 minutes 99 seconds)
Microwave Power for Variable Cooking
Repetition Rate;
HIGH ...............................................Full power throughout the cooking time
M . HIGH ............................................................approx. 70% of Full Power
MEDIUM .............................................................approx. 50% of Full Power
M . LOW..............................................................approx. 30% of Full Power
LOW....................................................................approx. 10% of Full Power
HELP PAD, SENSOR INSTANT REHEAT PADS
SENSOR COOK PADS, EXPRESS DEFROST PAD
EASY DEFROST PAD, SLOW COOK PAD
MORE( ), LES( ) PADS, NUMBER PADS
POWER LEVEL PAD, CLOCK PAD
TIMER PAD, STOP/CLEAR PAD
INSTANT COOK/START PAD
Set Weight Approx. 17 kg
PRODUCT SPECIFICATIONS
GENERAL INFORMATION
WARNING
THIS APPLIANCE MUST BE EARTHED
IMPORTANT
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE:
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE

R-380E
3
APPEARANCEVIEW
1. Door handle
2. Oven lamp
3. Door hinges
4. Door safety latches
5. See through door
6. Door seals and sealing surfaces
7. Coupling
8. Wave guide cover
9. Touch control panel
10.Digital readout
11.Ventilation openings
12.Power supply cord
13.Turntable tray
14.Turntable support
15.Menu label
TOUCH CONTROL PANEL
NOTE:
The directed feature is disabled after three minutes when the oven is not in use. This feature is
automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed.
9
10
4
6
5
3
1
2
8
7
15
4
14
12
13
11
1. HELP PAD
Press to select auto start, child lock,
demonstration modes or info on pads.
Press to get cooking information.
2. SENSOR INSTANT REHEAT PADS
Press once to reheat 1 of 6 popular
menus.
3. SENSOR COOK PADS
Press to select Sensor Cook menus.
4. EXPRESS DEFROST PAD
Press to select the Express Defrost
menu.
5. MORE ( ), LESS ( ) PADS
Press to increase/decrease the time in
one minute increments during cooking
or to alter the cooking result for the
automatic operations.
6. EASY DEFROST PAD
Presstodefrostfrozenfoodbyentering
quantity.
7. SLOW COOK PAD
Press to cook slowly and for a longer
time.
8. QUICK AND EASY PAD
PresstoselectQuickandEasymenus.
9. NUMBER PADS
Press to enter cooking times, clock
time, weight or quantity of food.
10. POWER LEVEL PAD
Press to select microwave power
setting.
If not pressed, HIGH is automatically
selected.
11. CLOCK PAD
Press to set Clock.
12. TIMER PAD
Press to set Timer.
13. STOP/CLEAR PAD
Press to clear during programming.
Press once to stop operation of oven during cooking; press
twice to cancel cooking programme.
14. INSTANT COOK/START PAD
Press once to cook for 1 minute on HIGH or increase by 1
minute multiples each time this pad is pressed during
cooking. Press to start oven after setting programmes.
Info Display
INST
INST
ANT
ANT
COOK
COOK
STOP
STOP
CLEAR
CLEAR
ST
ST
ART
ART
TIMER
CLOCK
POWER
LEVEL
SLOW
COOK
SENSOR INSTANT REHEAT
SENSOR COOK
QUICK &
EASY
PIZZA PIERICE
DINNER
PLATE
CASSEROLE SOUP
VE ETABLES RICE/PASTA
MEAT DESSERTS
HELP
EXPRESS
DEFROST
EASY
DEFROST
MORE
LESS
1
Indicator
3
6
8
12
14 (See NOTE.)
2
9
4
7
13
10
5
11
Display

R-380E
4
OPERATION SEQUENCE
OFF CONDITION
Closing the door activates all door interlock switches
(1st. latch switch and 2nd. interlock relay control switch).
IMPORTANT
Whentheovendoorisclosed,themonitorswitchcontacts
(COM-NC) must be open.
Whenthemicrowaveovenispluggedinawalloutlet,rated
voltage is supplied to the noise filter and the control unit.
Figure O-1 on page 25
1. The display shows flashing "88:88".
2. To set any programmes or set the clock, you must
first touch the STOP/CLEAR pad.
3. : appears in the display.
NOTE: When the oven door is opened, the oven lamp
comes on at this time.
MICROWAVE COOKING CONDITION
HIGH COOKING
Enter a desired cooking time with the touching NUMBER
pad and start the oven with touching START pad.
Function sequence
Figure O-2 on page 25
CONNECTED COMPONENTS RELAY
Oven lamp, Fan motor, Turntable motor RY1
Power transformer RY2
1. Ratedvoltage is supplied to theprimary winding of the
power transformer. The voltage is converted to about
3.3 volts A.C. output on the filament winding and high
voltage of approximately 2000 volts A.C. on the
secondary winding.
2. The filament winding voltage (3.3 volts) heats the
magnetronfilamentandthehighvoltage(2000volts)is
sentto the voltage doubling circuit,where itis doubled
to negative voltage of approximately 4000 volts D.C..
3. The 2450 MHz microwave energy produced in the
magnetron generates a wave length of 12.24 cm. This
energyis channeled throughthewaveguide(transport
channel)intothe oven cavity,wherethefood is placed
to be cooked.
4. Whenthecookingtimeisup,asignaltoneisheardand
the relays RY1+RY2 go back to their home position.
The circuits to the oven lamp, power transformer, fan
motor and turntable motor are cut off.
5. When the door is opened during a cook cycle, the
switches come to the following condition
CONDITION
DURING DOOR OPEN
SWITCH CONTACT COOKING (NOCOOKING)
1st. latch switch COM-NO Closed Open
2nd. interlock relay
control switch COM-NO Closed Open
Monitor switch COM-NC Open Closed
The circuits to the power transformer, fan motor and
turntable motor are cut off when the 1st. latch switch
and2nd. interlock relaycontrol switch aremade open.
The oven lamp remains on even if the oven door is
opened after the cooking cycle has been interrupted,
because the relay RY1 stays closed. Shown in the
display is the remaining time.
6. MONITOR SWITCH CIRCUIT
The monitor switch is mechanically controlled by
ovendoor,andmonitorstheoperationofthe1st.latch
switch and 2nd. interlock relay.
6-1 When the oven door is opened during or after the
cycle of a cooking program, the 1st. latch switch and
2nd. interlock relay control switch must open their
contacts first.
After that the contacts (COM-NC) of the monitor
switch can be closed.
6-2. When the oven door is closed, the contacts (COM-
NC) of the monitor switch must be opened. After that
thecontactsofthe1st.latchswitchand2nd.interlock
relay control switch are closed.
6-3. When the oven door is opened and the contacts of
the1st. latch switch and 2nd. interlock relay remain
closed.ThefuseM10Awillblow,becausethemonitor
switch is closed and a short circuit is caused.
MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOW
COOKING
When the microwave oven is preset for variable cooking
power, rated voltage is supplied to the power transformer
intermittently within a 32-second time base through the
relay contact which is coupled with the current-limiting
relay. The following levels of microwave power are given.
SETTING;
NOTE: TheON/OFFtimeratiodoesnotexactlycorrespond
to the percentage of microwave power, because
approx. 3 seconds are needed for heating up the
magnetron filament.
SENSOR COOKING CONDITION
Using the SENSOR COOK or SENSOR INSTANT RE-
HEAT function, the foods are cooked or reheated without
figuring time, power level or quantity. When the oven
senses enough steam from the food, it relays the informa-
tiontoitsmicroprocessorwhichwillcalculatetheremaining
cooking time and power level needed for best results.
When the food is cooked, water vapor is developed. The
sensor “senses” the vapor and its resistance increases
gradually. When the resistance reaches the value set
according to the menu, supplementary cooking is started.
The time of supplementary cooking is determined by ex-
perimentwitheachfoodcategoryandinputtedintotheLSI.
An example of how sensor works:
1. Potatoes at room temperature. Vapor is emitted very
slowly.
32 sec. ON
24 sec. ON
18 sec. ON
12 sec. ON
6 sec. ON
8 sec. OFF
14 sec. OFF
20 sec. OFF
26 sec. OFF
HIGH
MEDIUM HIGH
MEDIUM
MEDIUM LOW
LOW
Approx. 70%
Approx. 50%
Approx. 30%
Approx. 10%

R-380E
5
2. Heatpotatoes.Moistureandhumidityisemittedrapidly.
You can smell the aroma as it cooks.
3. Sensor detects moisture and humidity and calculates
cooking time and variable power.
Cooking Sequence.
1. Touch each SENSOR COOK or SENSOR INSTANT
REHEATfunctionpadtooperatingthesensorcooking.
(See the operation manual for the proper procedure.)
NOTE: The oven should not be operated on SENSOR
COOK or SENSOR INSTANT REHEAT
immediately after plugging in the unit. Wait two
minutes before cooking on SENSOR COOK or
SENSOR INSTANT REHEAT.
2. The coil of shut-off relay (RY-1) is energized, the
turntable motor, oven lamp and cooling fan motor are
turned on, but the power transformer is not turned on.
3. After about 16 seconds, the cook relay (RY-2) is
energized. The power transformer is turned on,
microwaveenergyisproducedandfirststageisstarted.
The16seconds is thecoolingtime required to remove
any vapor from the oven cavity and sensor.
NOTE: During this first stage, do not open the door or
touch STOP/CLEAR pad.
4. When the sensor detects the vapor emitted from the
food,thedisplayswitchesovertotheremainingcooking
time and the timer counts down to zero.
At this time, the door may be opened to stir food, turn
it or season, etc.
5. Whenthetimerreacheszero,anaudiblesignalsounds.
Theshut-offrelayandcookrelayarede-energizedand
the power transformer, oven lamp, etc. are turned off.
6. Opening the door or touching the STOP/CLEAR pad,
the time of day will reappear on the display and the
oven will revert to an OFF condition.
MICROWAVE
MICROWAVE
AH SENSOR

R-380E
6
DOOR OPEN MECHANISM
Thedoor is opened by pullingthe door, refer to theFigure
D-1.
Figure D-1. Door Open Mechanism
1ST. LATCH SWITCH AND 2ND. INTERLOCK
RELAY CONTROL SWITCH
1. Whentheovendoorisclosed,thecontacts(COM-NO)
must be closed.
2. When the oven door is opened, the contacts (COM-
NO) must be opened.
MONITOR SWITCH
1. Whentheovendoorisclosed,thecontacts(COM-NC)
must be opened.
2. When the oven door is opened, the contacts (COM-
NC) must be closed.
3. Iftheovendoorisopenedandthecontacts(COM-NO)
of the 1st. latch switch and 2nd. interlock relay fail to
open,thefuseM10Ablows simultaneouslywithclosing
the contacts (COM-NC) of the monitor switch.
CAUTION: BEFORE REPLACING A BLOWN FUSE
M10ATESTTHE1ST.LATCHSWITCH, 2ND.
INTERLOCK RELAY, MONITOR SWITCH
AND MONITOR RESISTOR FOR PROPER
OPERATION.
MONITOR RESISTOR 0.8Ω20W
The monitor resistor prevents the fuse M10A bursting
when the fuse M10A blows due to the operation of the
monitor switch.
HIGH VOLTAGE FUSE
Thehighvoltagefuseblowswhenthehighvoltagerectifier
or magnetron is shorted.
FUSE M10A
1. ThefuseM10Ablowswhenthecontacts(COM-NO)of
the 1st. latch switch and 2nd. interlock relay remain
closed with the oven door open and when the monitor
switch closes.
2. If the wire harness or electrical components are short-
circuited, this fuse M10A blows to prevent an electric
shock or fire hazard.
FUNCTION OF IMPORTANT COMPONENTS
OVEN THERMAL CUT-OUT
Thethermal cut-out, locatedon the topof theoven cavity,
is designed to prevent damage to the oven by fire. If the
foods load is overcooked, by either error in cook time or
defect in the control unit, the thermal cut-out will open.
Undernormaloperation,theoventhermalcut-outremains
closed.However,whenabnormallyhightemperaturesare
reached within the oven cavity, the oven thermal cut-out
will open at 125˚C, causing the oven to shut down. The
defective thermal cut-out must be replaced with new one.
MAGNETRON THERMAL CUT-OUT
The thermal cut-out located near the magnetron is de-
signed to prevent damage to the magnetron if an over
heated condition develops in the tube due to cooling fan
failure,obstructedairguide,dirtyorblockedairintake,etc.
Under normal operation, the thermal cut-out remains
closed.However,whenabnormallyhightemperaturesare
reached within the magnetron, the thermal cut-out will
open at 95˚C causing the oven to shut down, when the
magnetronhascooledto75˚C,thethermalcut-outcloses
and cook cycle will resume.
TURNTABLE MOTOR
Theturntablemotordrivestheturntablerollerassemblyto
rotate the turntable.
FAN MOTOR
Thefanmotordrivesabladewhichdrawsexternalcoolair.
This cool air is directed through the air vents surrounding
the magnetron and cools the magnetron. This air is
channeled through the oven cavity to remove steam and
vapors given off from the heating foods. It is then ex-
hausted through the exhausting air vents at the oven
cavity.
NOISE FILTER
The noise filter prevents the radio frequency interference
that might flow back in the power circuit.
Latch Hook
2nd. Interlock
Reley Control
Switch
Latch
Heads
Door
Monitor Switch
1st. Latch
Switch

R-380E
7
SERVICING
WARNING TO SERVICE PERSONNEL
Microwaveovenscontaincircuitrycapableofproducingveryhighvoltageandcurrent,contactwithfollowingparts
of the high voltage circuit will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High
voltage rectifier assembly, High voltage fuse, High voltage harness.
REMEMBER TO CHECK 3D
1) Disconnect the supply.
2) Door opened, and wedged open.
3) Discharge the high voltage capacitor.
WARNING: AGAINST THE CHARGE OF THE
HIGH-VOLTAGE CAPACITOR
Thehigh-voltagecapacitorremainschargedabout
60 seconds after the oven has been switched off.
Wait for 60 seconds and then short-circuit the
connectionofthehigh-voltagecapacitor(thatis,of
the connecting lead of the high-voltage rectifier)
against the chassis with the use of an insulated
screwdriver.
Sharprecommendthatwhereverpossiblefault-finding
is carried out with the supply disconnected. It may in,
some cases, be necessary to connect the supply after
the outer case has been removed, in this event carry
out 3D checks and then disconnect the leads to the
primary of the power transformer. Ensure that these
leads remain isolated from other components and the
ovenchassis.(Useinsulationtapeifnecessary.)When
the testing is completed carry out 3D checks and
reconnect the leads to the primary of the power trans-
former.
REMEMBER TO CHECK 4R
1) Reconnect all leads removed from components
during testing.
2) Replace the outer case (cabinet).
3) Reconnect the supply.
4) Run the oven. Check all functions.
Microwave ovensshould not be run empty.To testfor
the presence of microwave energy within a cavity,
place a cup of cold water on the oven turntable, close
the door and set the microwave timer for two (2)
minutes. Set the power level to HIGH and push the
START button. When the two minutes has elapsed
(timeratzero)carefullycheckthatthewaterisnowhot.
If the water remains cold carry out 3D checks and re-
examine the connections to the component being
tested.
When troubleshooting the microwave oven, it is helpful to
follow the Sequence of Operation in performing the
checks.Manyofthepossiblecausesoftroublewillrequire
that a specific test be performed. These tests are given a
procedure letter which will be found in the "Test
Procedure"section.
When all service work is completed, and the oven is fully assembled, the microwave power output should be
checked and microwave leakage test should be carried out.
TROUBLESHOOTING GUIDE
IMPORTANT: If the oven becomes inoperative because
of a blown fuse M10A in the 1st. latch
switch-2nd.interlockrelay-monitorswitch
- monitor resistor circuit, check the 1st.
latch switch, 2nd. interlock relay, monitor
switchand monitorresistorbeforereplac-
ing the fuse M10A.

R-380E
8
CK = Check / RE = Replace
MAGNETRON
POWER TRANSFORMER
H.V. RECTIFIER ASSEMBLY
HIGH VOLTAGE CAPACITOR
1ST. LATCH SWITCH
2ND.INTER LOCKRELAY
CONTROL SWITCH
MONITOR SWITCH
MONITOR RESISTOR
THERMAL CUT-OUT 95˚C /125˚C
FAN MOTOR
TURNTABLE MOTOR
FUSE M10A
TOUCH CONTROL PANEL
KEY UNIT
RELAY (RY-1, RY-2)
FOIL PATERN ON P.W.B.
POWER SUPPLY CORD
SHORTED WIRE HARNESS
OPENED WIRE HARNESS
OVEN LAMP OR SOCKET
WALL OUTLET
MISADJUSTMENT SWITCH
HOME FUSE OR BREAKER
BLOCKED COOLING FAN
BLOCKED VENTILATION
NOISE FILTER
HIGH VOLTAGE FUSE
AH SENSOR
Homefuseblowswhenpower
supply cord is plugged into
wall outlet.
FUSE M10A blows when
power supply cord is plugged
into wall outlet.
Display does not show any-
thingwhen power supplycord
is plugged into wall outlet.
Display doesnotoperateprop-
erly when STOP/CLEAR pad
is touched.
Oven lamp does not light at
door opened. (Display ap-
pears.)
Oven does not start when the
START pad is touched. (Dis-
play appears)
Ovenlampdoesnotlight(Dis-
play appears.)
Fan motor does not operate.
(Display appears.)
Turntable motor assembly
doesnotoperate.(Displayap-
pears.)
Oven or any electrical parts
does not stop when cooking
timeis0orSTOP/CLEARpad
is touched.
Oven seems to be operating
butlittleornoheatisproduced
in oven load. (Microwave
power level is set at HIGH)
Oven does not seems to be
operating properly when ME-
DIUM HIGH, MEDIUM, ME-
DIUM LOW or LOW is set.
(Oven operates properly at
HIGH and then the STOP/
CLEAR pad is touched the
oven stops.)
Ovengoesintocookcycle but
shutsdownbeforeendofcook-
ing cycle.
AH sensor does not end dur-
ingSensorCookingcondition.
(Ovendoesnotshutoffaftera
cup of water is boiling by sen-
sor cooking.)
Oven stops at 16 sec. after
starting.
TEST PROCEDURE ABC
D EEEGFHHILMNO RE CKCK RE CK CKCK CK CK JKP
CONDITION PROBLEM
POSSIBLE CAUSE
AND
DEFECTIVE PARTS
ON
CONDITION
OFF
CONDITION
SENSOR
COOKING
CONDITION

R-380E
9
NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL
WHILE THE OVEN IS IN OPERATION.
CARRY OUT 3D CHECK.
Isolatethe magnetron fromhigh voltage circuitby removing allleads connected tofilament terminal.
Totestforanopencircuitfilamentuseanohmmetertomakeacontinuitytestbetweenthemagnetron
filament terminals, the meter should show a reading of less than 1 ohm.
Totestforshortfilamenttoanodecondition,connectohmmeterbetweenoneofthefilamentterminals
and the case of the magnetron (ground). This test should be indicated an infinite resistance. If a low
or zero resistance reading is obtained then the magnetron should be replaced.
MICROWAVE OUTPUT POWER (1 litre water load)
The following test procedure should be carried out with the microwave oven in a fully assembled
condition (outer case fitted). Microwave output power from the magnetron can be measured by IEC
testprocedure,i.e.itcanbemeasuredbyusingwaterloadhowmuchitcanbeabsorbedbythewater
load.Tomeasurethemicrowaveoutputpowerinthemicrowaveoven,therelationofcalorieandwatt
is used. When P(W) heating works for t(second), approximately P x t/4.187 calorie is generated. On
theotherhand,ifthetemperatureofthewaterwithV(ml) rises∆T(˚C) during this microwave heating
period, the calorie of the water is V x ∆T.
The formula is as follows;
P x t / 4.187 = V x ∆T+ 0.55 x mc (T2-T0)/4.187 P (W) = 4.187 x V x ∆T / t + 0.55 x mc (T2-T0)/t
Our condition for water load is as follows:
Room temperature (T0) ... around 20°C Power supply Voltage.............. Rated voltage
Water load..................................1000 g Initial temperature (T1) ...................... 10±1°C
Heating time.............................. 36 sec. Mass of container (mc) ......................... 330 g
T2............................ Final Temperature P = 115 x ∆T + 0.55 x mc (T2-T0)/36
Measuring condition:
1. Container
The water container must be a cylindrical borosilicate glass vessel having a maximum material
thickness of 3 mm and an outside diameter of approximately 190 mm.
2. Temperature of the oven and vessel
The oven and the empty vessel are at ambient temperature prior to the start of the test.
3. Temperature of the water
The initial temperature of the water is (10±1)˚C.
4. Select the initial and final water temperature so that the maximum difference between the final
water temperature and the ambient temperature is 5˚C.
5. Selectstirringdevicesandmeasuringinstrumentsinordertominimizeadditionorremovalofheat.
6. The graduation of the thermometer must be scaled by 0.1˚C at minimum and an accurate
thermometer.
7. The water load must be (1000±5) g.
8. “t”ismeasuredwhilethemicrowavegeneratorisoperatingatfullpower.Magnetronfilamentheat-
up time is not included.
NOTE: The operation time of the microwave oven is “t + 3”sec. 3 sec. is magnetron filament heat-
up time.
Measuring method:
1. Measure the initial temperature of the water before the water is added to the vessel.
(Example: The initial temperature T1 = 11˚C)
2. Add the 1 litre water to the vessel.
3. Place the load on the centre of the shelf.
4. Operate the microwave oven at HIGH for the temperature of the water rises by a value ∆T of
10 ˚C.
5. Stir the water to equalize temperature throughout the vessel.
6. Measure the final water temperature. (Example: The final temperature T2 = 21°C)
7. Calculate the microwave power output P in watts from above formula.
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
AMAGNETRON TEST

R-380E
10
Room temperature .................. To = 21˚C Initial temperature................. T1 = 11°C
Temperature after (36 + 3) = 39 sec. ................................................................ T2 = 21°C
Temperature difference Cold-Warm .............................................................. ∆T1 = 10°C
Measured output power
The equation is “P = 115 x ∆T”........................................... P = 115 x 10°C = 1150 Watts
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
JUDGEMENT: The measured output power should be at least ±15 % of the rated output power.
CAUTION: 1°C CORRESPONDS TO 115 WATTS REPEAT MEASUREMENT IF THE POWER IS
INSUFFICIENT.
1000g
1000g
1000g
T1˚CT2˚C
Heat up for 39 sec.
BPOWER TRANSFORMER TEST
WARNING: Highvoltagesandlargecurrentsarepresentatthesecondarywindingandfilament
winding of the power transformer. It is very dangerous to work near this part when
the oven is on. NEVER make any voltage measurements of the high-voltage
circuits, including the magnetron filament.
CARRY OUT 3D CHECKS.
Disconnect the leads to the primary winding of the power transformer. Disconnect the filament and
secondary winding connections from the rest of the HV circuitry. Using an ohmmeter, set on a low
range, it is possible to check the continuity of all three windings. The following readings should be
obtained:
a. Primary winding ....................approx. 1.0 Ω
b. Secondary winding ...............approx. 86 Ω
c. Filament winding...................less than 1Ω
If the reading obtained are not stated as above, then the power transformer is probably faulty and
should be replaced.
CARRY OUT 4R CHECKS.
CHIGH VOLTAGE RECTIFIER ASSEMBLY TEST
HIGH VOLTAGE RECTIFIER TEST
CARRY OUT 3D CHECKS.
IsolatethehighvoltagerectifierassemblyfromtheHVcircuit.Thehighvoltagerectifier canbetested
using an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the
high voltage rectifier and note the reading obtained. Reverse the meter leads and note this second
reading.Thenormalresistanceisinfiniteinonedirectionandmorethan100kΩintheotherdirection.
CARRY OUT 4R CHECKS.
NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF
THEMEASURINGINSTRUMENTMUSTHAVEAVOLTAGEATLEAST6VOLTS,BECAUSE
OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS.
BC
HIGH VOLTAGE RECTIFIER

R-380E
11
CARRY OUT 3D CHECKS.
Disconnect the leads from the monitor resistor. Using an ohmmeter and set on a low range. Check
between the terminals of the monitor resistor.
The resistance of monitor resistor is approx. 0.8 ohms.
GMONITOR RESISTOR TEST
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
DHIGH VOLTAGE CAPACITOR TEST
CARRY OUT 3D CHECKS.
A. Isolate the high voltage capacitor from the circuit.
B. Continuity check must be carried out with measuring instrument which is set to the highest
resistance range.
C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ
after it has been charged.
D. A short-circuited capacitor shows continuity all the time.
E. An open capacitor constantly shows a resistance about 10 MΩbecause of its internal 10MΩ
resistance.
F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance.
G. The resistance across all the terminals and the chassis must be infinite when the capacitor is
normal.
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R CHECKS.
ESWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
Table: Terminal Connection of Switch
Plunger Operation COM to NO COM to NC COM; Common terminal
Released Open circuit Short circuit NO; Normally open terminal
Depressed Short circuit Open circuit NC; Normally close terminal
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make a
continuity test across the two terminals as described in the table below.
CARRY OUT 4R CHECKS. Table: Thermal cut-out Test
Temperature of "ON" condition Temperature of "OFF" condition Indication ofohmmeter
Parts Name (closed circuit) (˚C) (open circuit) (˚C) (When room temperature
is approx. 20˚C)
Thermal cut-out 125˚C This is not resetable type. Above 125˚C Closed circuit.
Thermal cut-out 95˚C Below 75˚C Above 95˚C Closed circuit.
If incorrect readings are obtained, replace the thermal cut-out.
Anopencircuitthermalcut-out95˚C(MG)indicatesthatthemagnetronhasoverheated,thismaybe
duetoresistrictedventilation,coolingfanfailureorafaultconditionwithinthemagnetronorHVcircuit.
An open circuit thermal cut-out 125˚C (OVEN) indicates that the foods in the oven may catch fire,
this may be due to over heating produced by improper setting of the cooking time or failure of the
control panel.
FTHERMAL CUT-OUT TEST

R-380E
12
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor.
Usinganohmmeter,checktheresistancebetweenthetwoterminalsasdescribedinthetablebelow.
Table: Resistance of Motor
Motors Resistance
Fan motor Approximately 405 Ω
Turntable motor Approximately 12 kΩ
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS
HMOTOR WINDING TEST
CARRY OUT 3D CHECKS.
1. If the fuse M10A is blown, there could be shorts or ground in electrical parts or wire harness.
Check them and replace the defective parts or repair the wire harness.
2. IfthefuseM10Aisblownwhenthedoorisopened,checkthe1st.latchswitch,2nd.interlockrelay,
monitor switch and monitor resistor.
Ifthe fuse M10Ais blownby incorrect doorswitching replace thedefective switch(s) and the fuse
M10A.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE FUSE M10A WITH THE CORRECT VALUE REPLACEMENT
IBLOWN FUSE M10A
JNOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the noise
filter. Using an ohmmeter, check between the termi-
nals as described in the following table.
MEASURING POINT INDICATION OF
OHMMETER
Between N and L Open circuit
Between terminal N and WHITE Short circuit
Between terminal L and RED Short circuit
If incorrect readings are obtained, replace the noise filter unit.
CARRY OUT 4R CHECKS.
N
LCx L
L
Cy
WHT
RED
L (min) Cx ±20% Cy ±20%
600µH 0.068µF 0.0022µF
CARRY OUT 3D CHECKS.
Ifthe high voltage fuse isblown,therecouldbeashortinthe highvoltage rectifier or the magnetron.
Check them and replace the defective parts and high voltage fuse.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE THE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE RE-
PLACEMENT
KHIGH VOLTAGE FUSE TEST
If incorrect readings are obtained, replace the monitor resistor.
CARRY OUT 4R CHECKS.

R-380E
13
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
MKEY UNIT TEST
If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable
ismakinggoodcontact,verifythatthedoorsensingswitch(stopswitch)operatesproperly;thatisthe
contacts are closed when the door is closed and open when the door is open. If the door sensing
switch (stop switch) is good, disconnect the flat ribbon cable that connects the key unit to the control
unitand make sure thedoor sensing switchisclosed (either closethe door orshortthe door sensing
switch connector). Use the key unit matrix indicated on the control panel schematic and place a
jumperwirebetweenthepinsthatcorrespondto the STOP/CLEAR pad making momentary contact.
If the control unit responds by clearing with a beep the key unit is faulty and must be replaced. If the
control unit does not respond, it is faulty and must be replaced. If a specific pad does not respond,
the above method may be used (after clearing the control unit) to determine if the control unit or key
pad is at fault.
CARRY OUT 3D CHECKS.
LTOUCH CONTROL PANEL ASSEMBLY TEST
ThetouchcontrolpanelconsistsofcircuitsincludingsemiconductorssuchasLSI,ICs,etc.Therefore,
unlike conventional microwave ovens, proper maintenance cannot be performed with only a
voltmeterandohmmeter.Inthisservicemanual,thetouchcontrolpanelassemblyisdivided intotwo
units, Control Unit and Key Unit, and also the Control Unit is divided into two units, CPU Unit and
Power Unit, and troubleshooting by unit replacement is described according to the symptoms
indicated.
1. Key Unit. Note: Check key unit ribbon connection before replacement.
The following symptoms indicate a defective key unit. Replace the key unit.
a) When touching the pads, a certain pad produces no signal at all.
b) When touching a number pad, two figures or more are displayed.
c) When touching the pads, sometimes a pad produces no signal.
2. Control Unit.
Thefollowingsymptomsindicateadefectivecontrolunit.Beforereplacingthecontrolunit,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) Wrong figure appears.
f) A certain group of indicators do not light up.
g) The figure of all digits flicker.
2-3 Other possible troubles caused by defective control unit.
a) Buzzer does not sound or continues to sound.
b) Clock does not operate properly.
c) Cooking is not possible.
G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8
G 9
G10
G11
G12
G13
G14
MORE
LESS
DINNER
PLATE
EASY
DEFROST RICE / PASTA
SOUP TIMER CLOCK MEAT
VEGETABLES
PIE
SLOW
COOK
EXPRESS
DEFROST
POWER
LEVEL QUICK & EASY STOP CLEAR
RICE HELP
INSTANT
COOK
START
PIZZA
DESSERTS
CASSEROLE
12345
67890
NRELAY TEST
RemovetheoutercaseandcheckvoltagebetweenPinNo1ofthe2-pinconnector(A)andthenormal
open terminal of the relay RY1 on the power unit with an A.C. voltmeter. The meter should indicate
230 - 240 volts, if not check oven circuit.

R-380E
14
To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary
onthe PWB, this foil patternactsasafuse.Ifthefoilpatternis open, follow the troubleshootingguide
given below for repair.
Problem: POWER ON, indicator does not light up.
CARRY OUT 3D CHECKS.
STEPS OCCURRENCE CAUSE OR CORRECTION
The rated AC voltage is not present between
1 Pin No. 2 of the 2-pin connector (A) and the Check supply voltage and oven power cord.
normal open terminal of the relay RY1.
2The rated AC voltage is present to primary Low voltage transformer or secondary circuit defective.
side of low voltage transformer. Check and repair.
3 Only pattern at "a" is broken. *Insert jumper wire J1 and solder.
4 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d".
NOTE: *At the time of making these repairs,
makeavisualinspectionofthevaristor.
Checkfor burned damageand exam-
inethetransformerwithatesterforthe
presence of layer short-circuit (check
the primary coil resistance). If any ab-
normal condition is detected, replace
the defective parts.
CARRY OUT 4R CHECKS.
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
OPROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD
(PWB) IS OPEN
RY1 and RY2 Relay Test
These relays are operated by D.C. voltage.
Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.
DC. voltage indicated............... Defective relay.
DC. voltage not indicated......... Checkdiodewhichisconnectedtotherelaycoil.Ifdiodeisgood,
control unit is defective.
RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS
RY1 APPROX. 25.0V D.C. Oven lamp / Turntable motor / Cooling fan motor
RY2 APPROX. 24.0V D.C. Power transformer
CARRY OUT 4R CHECKS.
RY1
VRS1
T1
RY3
(J1)
a
b
cd
PAH SENSOR TEST
Checking the initial sensor cooking condition
WARNING : The oven should be fully assembled before following procedure.
(1)The oven should be plugged in at least two minutes before sensor cooking.
(2)Room temperature should not exceed 35˚C.
(3)Theunit shouldnotbeinstalledinanyarea whereheatandsteamaregenerated.The unitshould
not be installed, for example, next to a conventional surface unit. Refer to the “INSTALLATION
INSTRUCTIONS”of the operation manual.
(4)Exhaustvents areprovided on the back of the unitfor propercooling andair flow in the cavity. To
permitadequateventilation,besuretoinstallsoasnottoblockthesevents.Thereshouldbesome
space for air circulation.
(5)Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any
moisture with a dry cloth or paper towel.
(6)The Sensor works with food at normal storage temperature. For example, chicken pieces would
be at refrigerator temperature and canned soup at room temperature.
(7)Avoid using aerosol sprays or cleaning solvents near the oven while using Sensor settings. The
sensor will detect the vapor given of by the spray and turn off before food is properly cooked.

R-380E
15
(8) If the sensor has not detected the vapor of the food, ERROR will appear and the oven will shut off.
Water load cooking test
WARNING : The oven should be fully assembled before following procedure.
Makesuretheovenhasbeenpluggedinatleasttwominutesbeforecheckingsensorcookoperation.
The cabinet should be installed and screws tightened.
(1)Fill approximately 200 milliliters of tap water in a 1000 milliliter measuring cup.
(2)Place the container on the center of tray in the oven cavity.
(3)Close the door.
(4)Touch the CLOCK once, the POWER LEVEL pad twice, the START pad once, the number pad
1onceandthenumberpad4once.Now,theovenisinthesensorcookingcondition,and"AH20",
"SENSOR" and "COOK" will appear in the display.
(5)The oven will operate for the first 16 seconds, without generating microwave energy.
NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage
of sensor cooking.
(6)After approximately 16 seconds, microwave energy is produced.
IfERROR isdisplayed orthe ovendoes notturn off,replace theAH sensoror checkthe controlunit,
refertoexplanationbelow.Iftheovenstopsafter5minutesandERRORis displayed, the AH sensor
is normal. Check other parts except the AH sensor.
TESTING METHOD FOR AH SENSOR AND/OR CONTROL UNIT
To determine if the sensor is defective, the simplest method is to replace it with a new replacement
sensor.
(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)Remove the AH sensor.
(5)Install the new AH sensor.
(6)Reconnect all leads removed from components during testing.
(7)Re-install the outer case (cabinet).
(8)Reconnect the power supply cord after the outer case is installed.
(9)Reconnect the oven to the power supply and check the sensor cook operation as follows:
9-1. Fill approximately 200 milliliters of tap water in a 1000 milliliter measuring cup.
9-2. Place the container on the center of tray in the oven cavity.
9-3. Close the door.
9-4. Touch the CLOCK pad once, the POWER LEVEL pad twice, the START pad once, the
number pad 1 once and the number pad 4 once.
9-5. The control panel is in automatic Sensor operation.
9-6. The oven turns off automatically, and the time for detecting moisture will be displayed.
Ifnewsensordose not operate properly, theproblemiswith the control unit, andrefertoexplanation
below. CHECKING CONTROL UNIT
(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 sensor connector that is mounted to control panel.
(5)Then connect the dummy resistor circuit (see fig.) to the sensor connector of control panel.
(6)Disconnect the leads to the primary of the power transformer.
(7)Ensure that these leads remain isolated from other components and oven chassis by using
insulation tape.
(8)After that procedure, re-connect the power supply cord.
(9)Check the sensor cook operation proceed as follows:
9-1. Touch the CLOCK pad once, the POWER LEVEL pad twice, the START pad once and the
number pad 1 once and the number pad 4 once.
9-2. The control panel is in the sensor cooking operation.
9-3. Afterapproximately 25seconds,pushplungerof selectswitchformorethan3 seconds.This
condition is same as judgement by AH sensor.
9-4. After approximately 3 seconds, the display shows “X X . X X “which is the time for detecting
moisture.
If the above is not the case, the control unit is probably defective.
If the above is proper, the AH sensor is probably defective.
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST

R-380E
16
TOUCH CONTROL PANEL ASSEMBLY
OUTLINE OF TOUCH CONTROL PANEL
The touch control section consists of the following units.
(1) Key Unit
(2) Control Unit (The Control Unit consists of Power Unit
and LSI Unit).
The principal functions of these units and the signals
communicated among them are explained below.
Key Unit
The key unit is composed of a matrix, signals generated
in the LSI are sent to the key unit through P00-P07.
Whenakeypadistouched,asignaliscompletedthrough
thekeyunitandpassedbacktotheLSIthroughP14-P17,
AIN6 and AIN7 to perform the function that was re-
quested.
Control Unit
Control unit consists of LSI, ACL circuit, indicator circuit,
powersourcecircuit,relaycircuit,buzzercircuit,synchro-
nizing signal circuit, absolute humidity sensor circuit and
back light circuit.
1) ACL
This circuit generates a signal which resets the LSI to
the initial state when power is supplied.
2) Indicator Circuit
This circuit consists of 40 segments and 16 common
electrodes using a Liquid Crystal Display.
3) Power Source Circuit
Thiscircuitgeneratesvoltagesnecessaryinthecontrol
unit from the AC line voltage.
In addition, the synchronizing signal is available in
order to compose a basic standard time in the clock
circuit.
Symbol Voltage Application
VC -5V LSI(IC1)
4) Relay Circuit
A circuit to drive the magnetron, fan motor, turntable
motor and light the oven lamp.
5) Buzzer Circuit
ThebuzzerisresponsivetosignalsfromtheLSItoemit
audible sounds (key touch sound and completion
sound).
6) Synchronizing Signal Circuit
The power source synchronizing signal is available in
order to compose a basic standard time in the clock
circuit.
It accompanies a very small error because it works on
commercial frequency.
7) 2nd. Interlock Relay Control Switch
A switch to “tell”the LSI if the door is open or closed.
8) Back Light Circuit
A circuit to drive the back light (Light emitting diodes
LD10-LD15).
9) Absolute Humidity Sensor Circuit
This circuit detects moisture of the cooking food to
allow its automatic cooking.
TEST PROCEDURES
PROCEDURE
LETTER COMPONENT TEST
(10) Disconnect the power supply cord, and then remove outer case.
(11) Open the door and block it open.
(12) Discharge high voltage capacitor.
(13) Disconnect the dummy resistor circuit from the sensor connector of control panel.
(14) Carry out necessary repair.
(15) Reconnect all leads removed from components during testing and repairing.
(16) Re-install the outer case (cabinet).
(17) Reconnect the power supply cord after the outer case is installed. Run the oven and check all
functions.
(18) Carry out "Water load cooking test" again and ensure that the oven works properly.
R1,R2 : 22Ω±1% 1/2W
R3 : 4.3kΩ±5% 1/4W
R4 : 1MΩ±5% 1/4W
Sensor Dummy Resistor Circuit
Plunger
NC
NO
COM
COM NO
NC
R3 R4
R1
R2
1
2
3
F-1
F-2
F-3
To connector (F)
on Control Unit.
CONNECTOR

R-380E
17
1 COM5 OUT Common data signal : COM11. Connected to LCD signal COM11.
2 COM4 OUT Common data signal : COM12. Connected to LCD signal COM12.
3 COM3 OUT Common data signal : COM13. Connected to LCD signal COM13.
4 COM2 OUT Common data signal : COM14. Connected to LCD signal COM14.
5 COM1 OUT Common data signal : COM15. Connected to LCD signal COM15.
6 COM0 OUT Common data signal : COM16. Connected to LCD signal COM16.
7-10 VL1-VL4 IN Power source voltage input terminal.
Standard voltage for LCD.
11 VL5 IN Power source voltage input terminal.
Standard voltage for LCD. Connected to GND.
12-14 C3-C1 IN Terminal not used.
15 VLIN IN Terminal not used.
16 VREG OUT Terminal not used.
17 NC Terminal not used.
18 VSS IN Power source voltage : -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC.
19-21 P27-P25 OUT Terminal not used.
22-26 P24-P22 IN Used for initial balancing of the bridge circuit (absolute humidity sensor).
27 P47 IN To input signal which communicates the door open/close information to LSI.
Door close "H" level signal (0V). Door open "L" level signal (-5V).
28 P46 OUT Terminal not used.
29 P45 OUT Oven lamp, fan motor and turntable motor driving signal.
Toturnonandoffshutoffrelay(RY1).Thesquare
waveform voltage is delivered to the RY1 driving
circuit and RY2 control circuit.
30 P44 OUT Magnetron high-voltage circuit driving signal.
To turn on and off the cook relay (RY2). The
signals holds "L" level during microwave cooking
and "H" level while not cooking. In other cooking
modes (variable cooking) the signal turns to "H"
level and "L" level in repetition according to the
power level. (ON and OFF times for other power level.)
31 P43 Terminal not used.
32 CNTR0 OUT Signal to sound buzzer (2.0 kHz).
A: key touch sound.
B: Completion sound.
33 P41 OUT Terminal not used.
34 INT0 IN Signal synchronized with commercial power source frequency.
This is the basic timing for time processing of LSI.
35 P07 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G1 line keys on key matrix is touched.
36 P06 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G2 line keys on key matrix is touched.
37 P05 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G3 line keys on key matrix is touched.
38 P04 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G4 line keys on key matrix is touched.
39 P03 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G5 line keys on key matrix is touched.
LSI
The I/O signal of the LSI is detailed in the following table.
Pin No. Signal I/O Description
20.0 msec.
During cooking
H : GND
L : -5V
100
PERCENT
70
PERCENT
H : GND
L : -5V
H : GND
L : -5V
ON
ON
OFF
OFF OFF
24 sec.
8 sec.
A
B
0.12 sec.
2.4 sec.
H : GND
L : -5V
H : GND
L : -5V
20.0 msec.
H : GND
L : -5V

R-380E
18
Pin No. Signal I/O Description
40 P02 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G6 line keys on key matrix is touched.
41 P01 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16 and P17
terminal while one of G7 line keys on key matrix is touched.
42 P00 OUT Key strobe signal.
Signal applied to touch-key section. A pulse signal is input to AIN7, P14, P15, P16, P17 and
AIN6 terminal while one of G8 line keys on key matrix is touched.
43 P17 IN Signal coming from touch key.
When either G9 line on key matrix is touched, a corresponding signal out of P00-P07 will be
input into P17. When no key is touched, the signal is held at "H" level.
44 P16 IN Signal similar to P17.
When either G10 line on key matrix is touched, a corresponding signal will be input into P16.
45 P15 IN Signal similar to P17.
When either G11 line on key matrix is touched, a corresponding signal will be input into P15.
46 P14 IN Signal similar to P17.
When either G12 line on key matrix is touched, a corresponding signal will be input into P14.
47 AIN7 IN Signal similar to P17.
When either G13 line on key matrix is touched, a corresponding signal will be input into AIN7.
48 AIN6 IN Input terminal to judge the model.
The signal out of P04 will be input into AIN6 through G4 line on key matrix. The LSI will judge
the model by this signal.
49 AIN5 IN AH sensor input.
This input is an analog input terminal from the AH sensor circuit, and connected to the A/D
converter built into the LSI.
50 AIN4 IN Usedforinitialbalancingofthebridgecircuit(absolutehumiditysensor).Thisinputisananalog
inputterminalfromtheAHsensorcircuit,andconnectedtotheA/DconverterbuiltintotheLSI.
51 RESET IN Auto clear terminal.
Signalis inputtoreset theLSIto theinitialstate whenpoweris applied. Temporarilyset "L" level
the moment power is applied, at this time the LSI is reset. Thereafter set at "H" level
52 NC Terminal not used.
53 XCOUT OUT Terminal not used.
54 XCIN IN Connected to VC.
55 NC Terminal not used.
56 VCC IN Power source voltage: GND(0V).
The power source voltage to drive LSI is input to VCC terminal.
57 OSCSEL IN Connected to VC(-5V).
58 XOUT OUT Internal clock oscillation output.
Output to control oscillation input of XIN.
59 VSS IN Power source voltage: -5.0V.
The power source voltage to the LSI is input to VSS terminal. Connected to VC.
60 NC Terminal not used.
61 XIN IN Internal clock oscillation frequency control input setting.
Theinternalclockfrequencyis set by inserting the ceramic filter oscillation circuit with respect
to XOUT terminal.
62 NC Terminal not used.
63-66 AIN3-AIN0 IN Terminal to change cooking input according to the Model.
By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in
operation is applied to set up its cooking constant.
67 COM8 OUT Common data signal : COM8. Connected to LCD signal COM8.
. 68 COM9 OUT Common data signal : COM7. Connected to LCD signal COM7.
69 COM10 OUT Common data signal : COM6. Connected to LCD signal COM6.
70 COM11 OUT Common data signal : COM5. Connected to LCD signal COM5.
71 COM12 OUT Common data signal : COM4. Connected to LCD signal COM4.
72 COM13 OUT Common data signal : COM3. Connected to LCD signal COM3.
73 COM14 OUT Common data signal : COM2. Connected to LCD signal COM2.
74 COM15 OUT Common data signal : COM1. Connected to LCD signal COM1.
75-102 SEG67-SEG40 OUT Terminal not used.
103-142 SEG39-SEG0 OUT Segment data signal.
Connected to LCD.