R-241CWAA R-241CWAC R-241CWAP SERVICE …archivos.diagramas.mx/otros/R241CWA.pdf · R-241CWAA...

R-241CWAAR-241CWACR-241CWAP

In interests of user-safety the oven should be restored to its originalcondition and only parts identical to those specified should be used.

MODELS R-241CWAA (Argentina)

R-241CWAC (Chile)

R-241CWAP (Peru)

S7908R241CPA/

MICROWAVE OVEN

TABLE OF CONTENTSCAUTION, MICROWAVE RADIATION ............................................................................................................... 1WARNING............................................................................................................................................................ 1PRODUCT SPECIFICATIONS ........................................................................................................................... 2GENERAL INFORMATION .................................................................................................................................. 2APPEARANCE VIEW ......................................................................................................................................... 3OPERATION SEQUENCE.................................................................................................................................. 4FUNCTION OF IMPORTANT COMPONENTS .................................................................................................. 5SERVICING ......................................................................................................................................................... 6TEST PROCEDURE ........................................................................................................................................... 8TOUCH CONTROL PANEL ............................................................................................................................... 14COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ............................................................. 18MICROWAVE MEASUREMENT ...................................................................................................................... 24WIRING DIAGRAM ........................................................................................................................................... 25PICTORIAL DIAGRAM ..................................................................................................................................... 26CONTROL PANEL CIRCUIT ............................................................................................................................. 27PRINTED WIRING BOARD ............................................................................................................................... 28PARTS LIST ..................................................................................................................................................... 29

SHARP CORPORATION

SERVICE MANUAL


1

SERVICE MANUAL

SHARP CORPORATION

OSAKA, JAPAN

MICROWAVE OVEN

R-241CWAA (Argentina)R-241CWAC (Chile)R-241CWAP (Peru)

GENERAL IMPORTANT INFORMATION

This Manual has been prepared to provide Sharp Corp. Serviceengineers with Operation and Service Information.

It is recommended that service engineers carefully study theentire text of this manual, so they will be qualified to rendersatisfactory customer service.

CAUTIONMICROWAVE RADIATION

DO NOT BECOME EXPOSED TO RADIATION FROMTHE MICROWAVE GENERATOR OR OTHER PARTSCONDUCTING MICROWAVE ENERGY.

Service engineers should not be exposed to the microwaveenergy which may radiate from the magnetron or othermicrowave generating devices if it is improperly used orconnected. All input and output microwave connections,waveguides, flanges and gaskets must be secured. Neveroperate the device without a microwave energy absorbingload attached. Never look into an open waveguide orantenna 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 trainedservice engineers.

All the parts marked "*" on parts list are used at voltages morethan 250V.

Removal of the outer wrap gives access to potentials above250V.

All the parts marked "∆" on parts list may cause unduemicrowave exposure, by themselves, or when they are dam-aged, loosened or removed.

TEST PROCEDURE

SERVICING ANDTROUBLESHOOTING CHART

FUNCTION OF IMPORTANTCOMPONENTS

OPERATING SEQUENCE

APPEARANCE VIEW

PRODUCT SPECIFICATIONS

WIRING DIAGRAM

PARTS LIST

MICROWAVE MEASUREMENT

TOUCH CONTROL PANELASSEMBLY

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE


2

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 (for R-241CWAA & R-241CWAC) : EARTHBLUE : NEUTRALBROWN : LIVE

ITEM DESCRIPTIONPower Requirements 220 Volts / 50 Hertz

R-241CWAA, R-241CWAC :Single phase, 3 wire earthed

220 Volts / 60 HertzR-241CWAP (Peru) : Single phase, 2 wire

Power Consumption 1.2 kW

Power Output 800 watts nominal of RF microwave energy (IEC 705)Operating frequency 2450 MHz

Case Dimensions Width 460 mmHeight 290 mm including footDepth 372 mm

Cooking Cavity Dimensions Width 314 mmHeight 199 mmDepth 321 mm

Turntable diameter 295 mm

Control Complement Touch Control System

Timer (0 - 99 minutes 99 seconds)Microwave Power for Variable Cooking

Repetition Rate;

HIGH ....................................... Full power throughout the cooking time

MEDIUM HIGH ........................................ approx. 70% of FULL Power

MEDIUM .................................................. approx. 50% of FULL Power

MEDIUM LOW ......................................... approx. 30% of FULL Power

LOW......................................................... approx. 10% of FULL Power

EASY DEFROST pad

INSTANT ACTION pads

Number pads

POWER LEVEL pad

TIMER/CLOCK pad

STOP/CLEAR pad

INSTANT COOK/START pad

Set Weight (Approx.) 14 kg

PRODUCT SPECIFICATIONS


3

APPEARANCE VIEW

TOUCH CONTROL PANEL

OVEN

8. Control panel9. Waveguide cover

10. Power supply cord11. Turntable12. Roller stay13. Earth wire [R-241CWAP]

1. Ventilation openings2. Oven lamp3. Door hinges4. Door safety latches5. See through door6. Door seals sealing surfaces7. Coupling

1. DIGITAL READOUT2. INDICATOR3. EASY DEFROST PAD

Press to select the Easy Defrost menu.4. INSTANT ACTION PADS

Press to cook or reheat 6 popular menus.5. NUMBER PADS

Press to enter cooking time, clock time, weight offood.

6. POWER LEVEL PADPress to select microwave power setting.If not pressed, HIGH is automatically selected.Press to alter the cooking result for automaticoperations.

7. TIMER/CLOCK PADPress to set clock, timer, child lock or demonstra-tion mode.

8. STOP/CLEAR PADPress to clear during programming.Press once to stop operation of oven during cook-ing; press twice to cancel cooking programme.

9. INSTANT COOK/START PADPress once to cook for 1 minute at 100% or in-crease by 1 minute multiples each time this pad ispressed during cooking.Press to start oven after setting programmes.

1

2

3

4

5

7

9

6

8

92 1

5447

11

3

6

8

12

1013


4

OPERATION SEQUENCE

OFF CONDITIONClosing the door activates all door interlock switches(1st. latch switch, 2nd. interlock relay control switch).

IMPORTANTWhen the oven door is closed, the monitor switch contacts(COM-NC) must be open.When the microwave oven is plugged in a wall outlet, ratedvoltage is supplied to the control unit.

Figure O-1 on page 25

1. The display flashes "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 CONDITIONHIGH COOKINGEnter a desired cooking time with the touching the numberkeys and start the oven with touching the start key.

Function sequence

Figure O-2 on page 25

CONNECTED COMPONENTS RELAY

Oven lamp, Fan motor, Turntable motor RY1

Power transformer RY2

1. Rated voltage is supplied to the primary winding of thepower transformer. The voltage is converted to about 3.3volts A.C. output on the filament winding and high voltageof approximately 2000 volts A.C. on the secondarywinding.

2. The filament winding voltage (3.3 volts) heats themagnetron filament and the high voltage (2000 volts) issent to the voltage doubling circuit, where it is doubled tonegative voltage of approximately 4000 volts D.C..

3. The 2450 MHz microwave energy produced in themagnetron generates a wave length of 12.24 cm. Thisenergy is channelled through the waveguide (transportchannel) into the oven cavity, where the food is placed tobe cooked.

4. When the cooking time is up, a signal tone is heard andthe relays RY1+RY2 go back to their home position. Thecircuits to the oven lamp, power transformer, fan motorand turntable motor are cut off.

5. When the door is opened during a cook cycle, theswitches come to the following condition.

CONDITION

DURING DOOR OPEN

SWITCH CONTACT COOKING (NO COOKING)

1st. latch switches COM-NO Closed Open2nd. interlock relaycontrol switch

COM-NO Closed Open

Monitor switch COM-NC Open Closed

The circuits to the power transformer, fan motor andturntable motor are cut off when the 1st. latch switch and2nd. interlock relay control switch are made open.

The oven lamp remains on even if the oven door isopened after the cooking cycle has been interrupted,because the relay RY1 stays closed. Shown in thedisplay is the remaining time.

6. MONITOR SWITCH CIRCUITThe monitor switch is mechanically controlled by ovendoor, and monitors the operation of the 1st. latch switchand the 2nd. interlock relay.

6-1 When the oven door is opened during or after the cycleof a cooking program, the 1st. latch switch and 2nd.interlock relay control switch must open their contactsfirst. After that the contacts (COM-NC) of the monitorswitch can be closed.

6-2. When the oven door is closed, the contacts (COM-NC)of the monitor switch must be opened. After that thecontacts of the 1st. latch switch and 2nd. interlock relaycontrol switch are closed.

6-3. When the oven door is opened and the contacts of the1st latch switch and 2nd. interlock relay remain closed.The fuse M8A will blow, because the monitor switch isclosed and a short circuit is caused.

MEDIUM HIGH, MEDIUM, MEDIUM LOW, LOWCOOKINGWhen the microwave oven is preset for variable cookingpower, rated voltage is supplied to the power transformerintermittently within a 32-second time base through the relaycontact which is coupled with the current-limiting relay. Thefollowing levels of microwave power are given.

SETTING;

NOTE: The ON/OFF time ratio does not exactly correspondto the percentage of microwave power, becauseapprox. 2 seconds are needed for heating up themagnetron filament.

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%


5

FUNCTION OF IMPORTANT COMPONENTS

DOOR OPEN MECHANISMThe door is opened by pulling the door, refer to the Figure D-1.

Figure D-1. Door Open Mechanism

1ST. LATCH SWITCH AND 2ND. INTERLOCK RE-LAY CONTROL SWITCH1. When the oven door is closed, the contacts (COM-NO)

must be closed.2. When the oven door is opened, the contacts (COM-NO)

must be opened.

MONITOR SWITCH1. When the oven door is closed, the contacts (COM-NC)

must be opened.2. When the oven door is opened, the contacts (COM-NC)

must be closed.3. If the oven door is opened and the contacts (COM-NO)

of the 1st latch switch and 2nd. interlock relay fail to open,the fuse blows simultaneously with closing the contacts(COM-NC) of the monitor switch.

CAUTION: BEFORE REPLACING A FUSE TEST THE1ST LATCH SWITCH, 2ND. INTERLOCKRELAY(RY2), 2ND. INTERLOCK RELAYCONTROL SWITCH, MONITOR SWITCH ANDMONITOR RESISTOR FOR PROPER OP-ERATION. (REFER TO CHAPTER "TESTPROCEDURE".)

MONITOR RESISTOR 0.8Ω 20WThe monitor resistor prevents the fuse bursting when thefuse blows due to the operation of the monitor switch.

FUSE1. The fuse blows when the contacts (COM-NO) of the 1st

latch switch and 2nd. interlock relay remain closed withthe oven door open and when the monitor switch closes.

2. If the wire harness or electrical components are short-circuited, the fuse M8A blows to prevent an electric shockof fire hazard.

HIGH VOLTAGE FUSEThe high voltage fuse blows when the high voltage rectifieror the magnetron is shorted.

THERMAL CUT-OUT 125˚C (OVEN)The thermal cut-out located on the top of the oven cavity isdesigned to prevent damage to the oven if the foods in theoven catch fire due to over heating produced by impropersetting of cook time or failure of control unit. Under normaloperation, the thermal cut-out remains closed. However,when abnormally high temperatures are reached within theoven cavity, the thermal cut-out will open at 125˚C, causingthe oven to shut down. The defective thermal cut-out mustbe replaced with a new one.

THERMAL CUT-OUT 95˚C (MAGNETRON )The thermal cut-out located on the top of the oven cavity isdesigned to prevent damage to the magnetron if an overheated condition develops in the tube due to cooling fanfailure, obstructed air guide, dirty or blocked air intake, etc.Under normal operation, the thermal cut-out remains closed.However, when abnormally high temperatures are reachedto the thermal cut-out , it will open at 95˚C, causing the ovento shut down. When the magnetron has cooled to 75˚C, thethermal cut-out closes and cook cycle will resume.

TURNTABLE MOTORThe turntable motor drives the roller stay to rotate theturntable.

FAN MOTORThe fan motor drives a blade which draws external cool air.This cool air is directed through the air vanes surroundingthe magnetron and cools the magnetron. This air is chan-nelled through the oven cavity to remove steam and vapoursgiven off from the heating foods. It is then exhausted throughthe exhausting air vents at the oven cavity.

Latch Heads

Latch Hook

Door

Monitor Switch1st. Latch

Switch

2nd. Interlock Relay Control Switch


6

SERVICING

WARNING TO SERVICE PERSONNELMicrowave ovens contain circuitry capable of producing very high voltage and current, contact with any part of the highvoltage circuit will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage rectifierassembly, High voltage fuse, High voltage harness.

REMEMBER TO CHECK 3D

1) Disconnect the supply.2) Door opened, and wedged open.3) Discharge high voltage capacitor.

WARNING: AGAINST THE CHARGE OF THEHIGH-VOLTAGE CAPACITOR

The high-voltage capacitor remains charged about60 seconds after the oven has been switched off.Wait for 60 seconds and then short-circuit the con-nection of the high-voltage capacitor (that is, of theconnecting lead of the high-voltage rectifier) againstthe chassis with the use of an insulated screwdriver.

Sharp recommend that wherever possible fault-finding iscarried out with the supply disconnected. It may in, somecases, be necessary to connect the supply after the outercase has been removed, in this event carry out 3D checksand then disconnect the leads to the primary of the powertransformer. Ensure that these leads remain isolatedfrom other components and the oven chassis. (Useinsulation tape if necessary.) When the testing is com-pleted carry out 3D checks and reconnect the leads to theprimary of the power transformer.

REMEMBER TO CHECK 4R

1) Reconnect all leads removed from components dur-ing testing.

2) Replace the outer case (cabinet).3) Reconnect the supply.4) Run the oven. Check all functions.

Microwave ovens should not be run empty. To test forthe presence of microwave energy within a cavity, placea cup of cold water on the oven turntable, close the doorand set the power level to HIGH. And set the microwavetimer for two (2) minutes. When the two minutes haselapsed (timer at zero) carefully check that the water isnow hot. If the water remains cold carry out 3D checksand re-examine the connections to the component beingtested.

When all service work is completed and the oven is fully assembled, the microwave power output should bechecked and microwave leakage test should be carried out.

IMPORTANT: If the oven becomes inoperative because ofa blown fuse M8A in the 1st. latch switch -2nd. interlock relay - monitor switch - moni-tor resistor circuit, check the 1st. latch switch,2nd. interlock relay, 2nd. interlock relay con-trol switch, monitor switch and monitorresistor before replacing the fuse M8A.

When troubleshooting the microwave oven, it is helpful tofollow the Sequence of Operation in performing the checks.Many of the possible causes of trouble will require that aspecific test be performed. These tests are given a proce-dure letter which will be found in the "Test Procedure"section.

TROUBLESHOOTING GUIDE


7

MA

GN

ET

RO

N

PO

WE

R T

RA

NS

FO

RM

ER

H.V

. RE

CT

IFIE

R A

SS

EM

BLY

HIG

H V

OLT

AG

E W

IRE

HIG

H V

OLT

AG

E C

AP

AC

ITO

R

1ST

. LA

TC

H S

WIT

CH

2ND

. IN

TE

RLO

CK

RE

LAY

CO

NT

RO

L S

WIT

CH

MO

NIT

OR

SW

ITC

H

MO

NIT

OR

RE

SIS

TO

R

TH

ER

MA

L C

UT

-OU

T 1

25˚C

(O

VE

N)

TH

ER

MA

L C

UT

-OU

T 9

5˚C

(M

G)

FA

N M

OT

OR

TU

RN

TA

BLE

MO

TO

R

FU

SE

M8A

TO

UC

H C

ON

TR

OL

PA

NE

L

RE

LAY

(R

Y-1

, RY

-2)

FO

IL P

AT

ER

N O

N P

.W.B

.

PO

WE

R S

UP

PLY

CO

RD

SH

OR

TE

D W

IRE

HA

RN

ES

S

OP

EN

ED

WIR

E H

AR

NE

SS

OV

EN

LA

MP

OR

SO

CK

ET

WA

LL O

UT

LET

MIS

AD

JUS

TM

EN

T S

WIT

CH

HO

ME

FU

SE

OR

BR

EA

KE

R

BLO

CK

ED

CO

OLI

NG

FA

N

BLO

CK

ED

VE

NT

ILA

TIO

N

KE

Y U

NIT

H.V

. FU

SE

Home fuse blows when powersupply cord is plugged intowall outlet.

FUSE M8A blows when powersupply cord is plugged intowall outlet.

"88:88" does not appear in dis-play but power supply cord isplugged into wall outlet.

Display does not operate prop-erly when stop/clear pad istouched.

Oven lamp does not light atdoor opened. (Display ap-pears.)

Oven does not start when thestart pad is touched. (Displayappears)

Oven lamp does not light (Dis-play appears.)

Fan motor does not operate.(Display appears.)

Turntable motor does not op-erate. (Display appears.)

Oven or any electrical partsdoes not stop when cookingtime is 0 or stop/clear pad istouched.

Oven seems to be operatingbut little or no heat is producedin oven load. (Microwavepower level is set at HIGH)

Oven does not seems to beoperating properly when ME-DIUM HIGH, MEDIUM, ME-DIUM LOW or LOW is set.(Oven operates properly atHIGH and then the stop/clearpad is touched the ovenstops.)

Oven goes into cook cycle butshuts down before end of cook-ing cycle.

OFFCONDITION

PROBLEMCONDITION

POSSIBLE CAUSEAND

DEFECTIVE PARTS

TEST PROCEDURE

ONCONDITION

CK = Check / RE = Replace

A B C CK D E E E F G G H H I K M N RE CK CK RE CK CK CK CK CK L J


8

CARRY OUT 3D CHECKS.

Isolate the magnetron from the high voltage circuit by removing all leads connected to the filamentterminal.

To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetronfilament terminals, the meter should show a reading of less than 1 ohm.

To test for a short circuit filament to anode condition, connect ohmmeter between one of the filamentterminals and the case of the magnetron (ground). This test should be indicated an infinite resistance. Ifa 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 way of IEC 705, i.e.it can be measured by using water load how much it can be absorbed by the water load. To measure themicrowave output power in the microwave oven, the relation of calorie and watt is used. When P(W)heating works for t(second), approximately P x t/4.187 calorie is generated. On the other hand, if thetemperature of the water with V(ml) rises ∆T (˚C) during this microwave heating period, the calorie of thewater is V x ∆T.

Measuring condition:1. Container

The water container must be a cylindrical borosilicate glass vessel having a maximum materialthickness of 3 mm and an outside diameter of approximately 190 mm.

2. Temperature of the oven and vesselThe oven and the empty vessel are at ambient temperature prior to the start of the test.

3. Temperature of the waterThe initial temperature of the water is (10±2)˚C.

4. Select the initial and final water temperature so that the maximum difference between the final watertemperature and the ambient temperature is 5˚C.

5. Select stirring devices and measuring instruments in order to minimize addition or removal of heat.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” is measured while the microwave generator is operating at full power. Magnetron filament heat-up

time is not included.NOTE: The operation time of the microwave oven is “t + 2” sec. 2 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 ± 2)˚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.

A MAGNETRON TEST

NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOLWHILE THE OVEN IS IN OPERATION.

The formula is as follows;P x t / 4.187 = V x ∆ T P (W) = 4.187 x V x ∆T / t

Our condition for water load is as follows:Room temperature..............around 20˚C Power supply Voltage.........Rated voltageWater load.........1000 g Initial temperature...........10±2°C Heating time.........52 sec.

P = 80 x ∆ T

TEST PROCEDURES

PROCEDURELETTER COMPONENT TEST


9

1000g

1000g1000g

T1˚C T2˚CHeat up for 54 sec.

B POWER TRANSFORMER TEST

CARRY OUT 3D CHECKS.Disconnect the leads to the primary winding of the power transformer. Disconnect the filament andsecondary 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:

WARNING: High voltages and large currents are present at the secondary winding and filamentwinding of the power transformer. It is very dangerous to work near this part when theoven is on. NEVER make any voltage measurements of the high-voltage circuits,including the magnetron filament.

If the reading obtained are not stated as above, then the power transformer is probably faulty and shouldbe replaced.CARRY OUT 4R CHECKS.

Initial temperature .................................................................................................. T1 = 11°CTemperature after (52 + 2) = 54 sec. ..................................................................... T2 = 21°CTemperature difference Cold-Warm.................................................................... ∆T1 = 10°CMeasured output powerThe equation is “P = 80 x ∆T” ...................................................... P = 80 x 10°C = 800 Watts

JUDGMENT: The measured output power should be at least ± 15 % of the rated output power.

CAUTION: 1°C CORRESPONDS TO 80 WATTS. REPEAT MEASUREMENT IF THE POWER ISINSUFFICIENT.

C HIGH VOLTAGE RECTIFIER ASSEMBLY TEST

HIGH VOLTAGE RECTIFIER TEST


Isolate the high voltage rectifier assembly from the HV circuit. The high voltage rectifier can be testedusing an ohmmeter set to its highest range. Connect the ohmmeter across the terminal B+C of the highvoltage rectifier and note the reading obtained. Reverse the meter leads and note this second reading.The normal resistance is infinite in one direction and more than 100 kΩ in the other direction.

CARRY OUT 4R CHECKS.

NOTE: FOR MEASUREMENT OF THE RESISTANCE OF THE RECTIFIER, THE BATTERIES OF THEMEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BECAUSEOTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS.

TEST PROCEDURES


B C

HIGH VOLTAGE RECTIFIER

R-241CWAA/241CWAC R-241CWAP (Peru)

Primary winding 1.6 ohms approximately 1.35 ohms approximately

Secondary winding 128 ohms approximately 123 ohms approximatelyFilament winding less than 1 ohm


10

TEST PROCEDURES


D HIGH VOLTAGE CAPACITOR TEST


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 MΩ because 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.


E SWITCH TEST

Isolate the switch to be tested and using an ohmmeter check between the terminals as described in thefollowing table.


Table: Terminal Connection of SwitchPlunger Operation COM to NO COM to NC

Released O.C. S.C.Depressed S.C. O.C.

COM; Common terminal,NO; Normally open terminalNC; Normally close terminalS.C.; Short circuitO.C.; Open circuit

If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.


F MONITOR RESISTOR TEST

CARRY OUT 3D CHECKS.Disconnect the leads from the monitor resist. Using an ohmmeter and set on a low range. Check betweenthe terminals of the monitor resistor.

The resistance of monitor resistor is approx. 0.8 ohms.

If incorrect readings are obtained, replace the monitor resistor. CARRY OUT 4R CHECKS.

G THERMAL CUT-OUT TEST

CARRY OUT 3D CHECKS.Disconnect the leads from the terminals of the thermal cut-out. Then using an ohmmeter, make acontinuity test across the two terminals as described in the below.

CARRY OUT 4R CHECKS.Table: Thermal Cut-out Test

Temperature of "ON" condition Temperature of "OFF" condition Indication of ohmmeter (When roomParts Name (closed circuit). (open circuit). 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.


11

TEST PROCEDURES


An open circuit thermal cut-out (MG) indicates that the magnetron has overheated, this may be due toresistricted ventilation, cooling fan failure or a fault condition within the magnetron or HV circuit.

An open circuit thermal cut-out (OVEN) indicates that the food in the oven cavity may catch fire, this maybe due to overheating produced by improper setting of the cooking time or failure of the control panel.

H MOTOR WINDING TEST


Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the twoterminals as described in the table below.

I FUSE M8A


If the fuse M8A is blown when the door is opened, check the 1st latch switch, 2nd. interlock relay, 2nd.interlock relay control switch, monitor switch and monitor resistor.

If the fuse M8A is blown by incorrect door switching, replace the defective switch(s) and the fuse M8A.

If the fuse M8A is blown, there is a shorts or grounds in electrical parts or wire harness.Check them and replace the defective parts or repair the wire harness.


CAUTION: Only replace fuse with the correct value replacement.

If incorrect readings are obtained, replace the motor.


J HIGH VOLTAGE FUSE TEST

CARRY OUT 3D CHECKS.If the high voltage fuse is blown, there could be a short in the high voltage rectifier or the magnetron.Check them and replace the defective parts and the high voltage fuse.


CAUTION: ONLY REPLACE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE REPLACE-MENT.

K TOUCH CONTROL PANEL ASSEMBLY TEST

The touch control panel consists of circuits including semiconductors such as LSI, ICs, etc. Therefore,unlike conventional microwave ovens, proper maintenance cannot be performed with only a voltmeterand ohmmeter.In this service manual, the touch control panel assembly is divided into two units, Control Unit and KeyUnit, troubleshooting by unit replacement is described according to the symptoms indicated.1. Key Unit.

The following symptoms indicate a defective key unit. Replace the key unit.

Table: Resistance of MotorResistance

Motors R-241CWAA/241CWAC R-241CWAP (Peru)Fan motor Approximately 390 ohms Approximately 166 ohmsTurntable motor Approximately 12 kohms Approximately 12 kohms


12

M RELAY TEST

TEST PROCEDURES


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.The following symptoms indicate a defective control unit. Replace the control unit.

2-1 Programming problems.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 Display problems.a) For a certain digit, all or some segments do not light up.b) For a certain digit, brightness is low.c) Only one indicator does not light up.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 problems 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.

L KEY UNIT TEST

If the display fails to clear when the Detención/Cancelación pad is depressed, first verify the flat ribboncable is making good contact, verify that 2nd interlock relay control switch (door sensing switch) operatesproperly; that is the contacts are closed when the door is closed and open when the door is open. If 2ndinterlock relay control switch (door sensing switch) is good, disconnect the flat ribbon cable that connectsthe key unit to the control unit and make sure the door sensing switch is closed (either close the door orshort the door sensing switch connecter). Use the Key unit matrix indicated on the control panel schematicand place a jumper wire between the pins that correspond to the Detención/Cancelación pad makingmomentary contact. If the control unit responds by clearing with a beep, the key unit is faulty and mustbe replaced. If the control unit does not respond, it is a faulty and must be replaced. If a specific pad doesnot respond, the above method may be used (after clearing the control unit) to determine if the controlunit or key pad is at fault.

Remove the outer case and check voltage between Pin No 3 of the 2 pin connector (A) and commonterminal (lower terminal) of the relay (RY2) on the control unit with an A.C. voltmeter.The meter should indicate 220 volts, if not check oven circuit.

RY1 and RY2 Relay TestThese relays are operated by D.C. voltageCheck voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation.

1

2

3 45

6

789

0

Plato Principal

Nivel de Potencia

Verdura Congelada

Papa AsadaBebida

Verdure Fresca

Cronómetro Reloj

Arroz/ Pasta

G 6 G 5 G 4 G 3 G 2 G 1

G 7

G 8

G 9

G10Comienzo

Minuto Extra

Detención Cancelación

DESCONGELACION AUTOMATICA


13

TEST PROCEDURES


N PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD(PWB) IS OPEN

NOTE: At the time of making these repairs,make a visual inspection of the varistor.Check for burned damage and examinethe transformer with tester for the pres-ence of layer short-circuit (check pri-mary coil resistance). If any abnormalcondition is detected, replace the defec-tive parts.

DC. voltage indicated .......... Defective relay.DC. voltage not indicated .... Check diode which is connected to the relay coil. If diode is good, control

unit is defective.

RELAY SYMBOL OPERATIONAL VOLTAGE CONNECTED COMPONENTS

RY1 Approx. 15.0V D.C. Oven lamp / Turntable motor / Cooling fan motor

RY2 Approx. 14.0V D.C. Power transformer

To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary onthe PWB, this foil pattern acts as a fuse. If the foil pattern is open, follow the troubleshooting guide givenbelow for repair.

Problem: POWER ON, indicator does not light up.

STEPS OCCURANCE CAUSE OR CORRECTIONThe rated voltage is not applied between Pin

1 No. 3 of the 2 pin connector (A) and the. Check supply voltage and oven power cord.common terminal of the relay RY2.

2The rated voltage is applied to primary side Low voltage transformer or secondary circuit defective.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".

1 2

a

b c d

3 1

P

AC (N) FM TTM OLRY1

VR

S1

T1RY2

(J1)


14

The touch control section consists of the following units asshown in the touch control panel circuit.

(1) Key Unit(2) Control Unit

The principal functions of these units and their relatedsignals are explained below.

Key UnitThe key unit is composed of a matrix, signals generated inthe LSI are sent to the key unit through R81, R82, R83, R90,R91 and R92.When a key pad is touched, a signal is completed throughthe key unit and passed back to the LSI through R60, R61,R62, R63 to perform the function that was requested.

Control UnitControl unit consists of LSI, ACL circuit, indicator circuit,power source circuit, relay circuit, buzzer circuit and syn-chronizing signal circuit.

1) ACLThis circuit generates a signal which resets the LSI to theinitial state when power is supplied.

2) Indicator CircuitThis circuit consists of 4-digits, 12-segments and 3-common electrodes using a Liquid Crystal Display.

TOUCH CONTROL PANEL ASSEMBLY

OUTLINE OF TOUCH CONTROL PANEL

3) Power Source CircuitThis circuit generates voltage necessary in the controlunit from the AC line voltage. In addition, the synchroniz-ing signal is available in order to compose a basicstandard time in the clock circuit.

Symbol Voltage Application

VC -5V LSI(IC1)

4) Relay CircuitTo drive the magnetron, fan motor, turntable motor andlight the oven lamp.

5) Buzzer CircuitThe buzzer is responsive to signals from the LSI to emitaudible sounds (key touch sound and completion sound).

6) Synchronizing Signal CircuitThe power source synchronizing signal is available inorder to compose a basic standard time in the clockcircuit. It accompanies a very small error because itworks on commercial frequency.

7) 2nd. Interlock Relay Control Switch (Door SensingSwitch)A switch to “tell” the LSI if the door is open or closed.


15

1-12 SEG0-SEG11 OUT Segment data signal.Connected to LCD.The relation between signals are as follows:

LSI signal (Pin No.) LCD (Pin No.) LSI signal (Pin No.) LCD (Pin No.)SEG 0 (1) .............................. S12 SEG 6 (7) ................................. S6SEG 1 (2) .............................. S11 SEG 7 (8) ................................. S5SEG 2 (3) .............................. S10 SEG 8 (9) ................................. S4SEG 3 (4) ................................ S9 SEG 9 (10) ............................... S3SEG 4 (5) ................................ S8 SEG 10 (11) ............................. S2SEG 5 (6) ................................ S7 SEG 11 (12) ............................. S1

13 R60 IN Signal coming from touch key.When either G10 line on key matrix is touched, a corresponding signal out of R81 -R83and R90 - R92 will be input into R60. When no key is touched, the signal is held at “H”level.

14 R61 IN Signal similar to R60.When either G9 line on key matrix is touched, a corresponding signal will be input into R60.



17 AIN0 IN To input signal which communicates the door open/close information to LSI.Door close “H” level signal (0V). Door open “L” level (-5V).

18-20 AIN1-AIN3 IN Terminal to change functions according to the Model.By using the A/D converter contained in the LSI, DC voltage in accordance with theModel in operation is applied to set up its function.

21 VSS IN Power source voltage: -5V.VSS voltage of power source circuit input.

22 R70 OUT Magnetron high-voltage circuit driving signal.To turn on and off the cook relay (RY2). The signalsholds “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.

23 PULSE OUT Signal to sound buzzer (2.0 kHz).

A: key touch sound.

B: Completion sound.

R-241CWAA/ R-241CWAC R-241CWAP (Peru)

24 R72 OUT Oven lamp, fan motor and turntable motor driving signal.

To turn on and off shut off relay (RY1). The square waveform voltage is delivered to theRY1 driving circuit and RY2 control circuit.


DESCRIPTION OF LSILSI(IZA906DR)The I/O signal of the LSI(IZA906DR) are detailed in the following table.

Pin No. Signal I/O Description

H : GND

L : -5V

OFF

ON

ON

OFF OFF

H : GND

L : -5V

P-HI

P-70 24 sec. 8 sec.

A

B

0.12 sec.

2.4 sec.

H : GND

L : -5V

H : GND

L : -5V

During cooking

L : -5V

H : GND

20.0 msec.

A

B

0.1 sec.

2.0 sec.

H : GND

L : -5V

H : GND

L : -5V

During cooking

L : -5V

H : GND

16.7 msec.


16

25 R73 OUT Terminal not used.

26 INT2 IN Signal synchronized with commercial power source frequency.

This is the basic timing for time processing of LSI.

R-241CWAA/R-241CWAC R-241CWAP (Peru)

27 R81 OUT Key strobe signal.Signal applied to touch-key section. A pulse signal is input to R60 - R63 terminal whileone of G6 line keys on key matrix is touched.






33 XIN IN Internal clock oscillation frequency setting input.The internal clock frequency is set by inserting the capacitor-resistor oscillation circuitwith respect to XOUT terminal.

34 XOUT OUT Internal clock oscillation frequency control output.Output to control oscillation input of XIN.

35 RESET IN Auto clear terminal.Signal is input to reset the LSI to the initial state when power is supplied. Temporarilyset to “L” level the moment power is supplied, at this time the LSI is reset. Thereafter setat “H” level.

36 HOLD IN/OUT Connected to GND.

37 VLC IN Signal synchronized with commercial power source frequency .Signal similar to VSS.

38 COM1 OUT Common data signal: COM1.Connected to LCD (Pin No. C1)



41 COM4 OUT Terminal not used.

42 VDD IN Power source voltage input terminal.Connected to GND.

Pin No. Signal I/O Description

20.0 msec

H : GND

L : -5V16.7 msec

H : GND

L : -5V


17

1. Precautions for Handling Electronic ComponentsThis unit uses CMOS LSI in the integral part of thecircuits. When handling these parts, the following pre-cautions should be strictly followed. CMOS LSI haveextremely high impedance at its input and output termi-nals. For this reason, it is easily influenced by thesurrounding high voltage power source, static electricitycharge in clothes, etc., and sometimes it is not fullyprotected by the built-in protection circuit.In order to protect CMOS LSI.1) When storing and transporting, thoroughly wrap them

in aluminium foil. Also wrap PW boards containingthem in aluminium foil.

2) When soldering, ground the technician as shown inthe figure and use grounded soldering iron and worktable.

2. Shapes of Electronic Components

3. Servicing of Touch Control PanelWe describe the procedures to permit servicing of thetouch control panel of the microwave oven and theprecautions you must take when doing so.To perform the servicing, power to the touch controlpanel is available either from the power line of the ovenitself or from an external power source.

(1) Servicing the touch control panel with powersupply of the oven :

CAUTION:THE HIGH VOLTAGE TRANSFORMER OF THEMICROWAVE OVEN IS STILL LIVE DURING SERV-ICING AND PRESENTS A HAZARD .

Therefore, when checking the performance of thetouch control panel, put the outer cabinet on the ovento avoid touching the high voltage transformer, orunplug the primary terminal (connector) of the highvoltage transformer to turn it off; the end of suchconnector must be insulated with an insulating tape.After servicing, be sure to replace the leads to theiroriginal locations.

A. On some models, the power supply cord betweenthe touch control panel and the oven itself is soshort that the two can’t be separated.

For those models, check and repair all the controls(sensor-related ones included) of the touch con-trol panel while keeping it connected to the oven.

SERVICING

EC B

B. On some models, the power supply cord betweenthe touch control panel and the oven proper is solong enough that they may be separated fromeach other. For those models, therefore, it ispossible to check and repair the controls of thetouch control panel while keeping it apart from theoven proper; in this case you must short both endsof the door sensing switch (on PWB) of the touchcontrol panel with a jumper, which brings about anoperational state that is equivalent to the ovendoor being closed. As for the sensor-related con-trols of the touch control panel, checking them ispossible if the dummy resistor(s) with resistanceequal to that of the controls are used.

(2) Servicing the touch control panel with powersupply from an external power source:Disconnect the touch control panel completely fromthe oven proper, and short both ends of the doorsensing switch (on PWB) of the touch control panel,which brings about an operational state that is equiva-lent to the oven door being closed. Connect anexternal power source to the power input terminal ofthe touch control panel, then it is possible to checkand repair the controls of the touch control panel; it isalso possible to check the sensor-related controls ofthe touch control panel by using the dummy resistor(s).

4. Servicing ToolsTools required to service the touch control panel assem-bly.1) Soldering iron: 30W

(It is recommended to use a soldering iron with agrounding terminal.)

2) Oscilloscope: Single beam, frequency range: DC -10MHz type or more advanced model.

3) Others: Hand tools

5. Other Precautions1) Before turning on the power source of the control unit,

remove the aluminium foil applied for preventingstatic electricity.

2) Connect the connector of the key unit to the controlunit being sure that the lead wires are not twisted.

3) After aluminium foil is removed, be careful that abnor-mal voltage due to static electricity etc. is not appliedto the input or output terminals.

4) Attach connectors, electrolytic capacitors, etc. toPWB, making sure that all connections are tight.

5) Be sure to use specified components where highprecision is required.

approx. 1M ohm

Transistor2SA933SDTA143ESKRA101MKRC243M


18

COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE

WARNING: Avoid possible exposure to microwave energy. Please follow the instructions belowbefore operating the oven.

1. Disconnect oven from power supply.2. Visually check the door and cavity face plate for damage

(dents, cracks, signs of arcing etc.).

Carry out any remedial work that is necessary before oper-ating the oven.Do not operate the oven if any of the following conditionsexist;1. Door does not close firmly.2. Door hinge, support or latch hook is damaged.3. The door gasket or seal or damaged.

4. The door is bent or warped.5. There are defective parts in the door interlock system.6. There are defective parts in the microwave generating

and transmission assembly.7. There is visible damage to the oven.

Do not operate the oven:1. Without the RF gasket (Magnetron).2. If the wave guide or oven cavity are not intact.3. If the door is not closed.4. If the outer case (cabinet) is not fitted.

Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any ofthe following removal procedures:

WARNING FOR WIRING

To prevent an electric shock, take the following man-ners.1. Before wiring,

1) Disconnect the power supply.2) Open the door and wedge the door open.3) Discharge the high voltage capacitor and wait for 60

seconds.2. Don't let the wire leads touch to the following parts;

1) High voltage parts:Magnetron, High voltage transformer, High voltagecapacitor, High voltage fuse and High voltage recti-fier assembly.

2) Hot parts:Oven lamp, Magnetron, High voltage transformerand Oven cavity.

3) Sharp edge:Bottom plate, Oven cavity, Waveguide flange, Chas-sis support and other metallic plate.

4) Movable parts (to prevent a fault)Fan blade, Fan motor, Switch

3. Do not catch the wire leads in the outer case cabinet.4. Insert the positive lock connector certainly until its pin

is locked. And make sure that the wire leads should notcome off even if the wire leads is pulled.

5. To prevent an error function, connect the wire leadscorrectly, referring to the Pictorial Diagram.

To remove the outer case proceed as follows.1. Disconnect oven from power supply.2. Open the oven door and wedge it open.3. Remove the eight (8) screws from rear and along the side

edge of case.4. Slide the entire case back about 3cm to free it from

retaining clips on the cavity face plate.5. Lift the entire case from the oven.

6. Discharge the H.V. capacitor before carrying out anyfurther work.

7. Do not operate the oven with the outer case removed.N.B.; Step 1, 2 and 6 form the basis of the 3D checks.

CAUTION: DISCHARGE HIGH VOLTAGE CAPACITORBEFORE TOUCHING ANY OVEN COMPO-NENT OR WIRING.

OUTER CASE REMOVAL

1. CARRY OUT 3D CHECKS.2. Disconnect the wire leads (main wire harness and H.V.

fuse) from power transformer.3. Disconnect the filament lead of power transformer from

the magnetron.

4. Disconnect the filament lead of the power transformerfrom high voltage capacitor.

5. Remove the two (2) screws holding the transformer tobottom plate and (2) screws from bottom plate.

6. Remove the transformer.

POWER TRANSFORMER REMOVAL


19

HIGH VOLTAGE COMPONENTS REMOVAL(HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE)

To remove the components, proceed as follows.1. CARRY OUT 3D CHECKS.2. Disconnect the H.V. fuse from the power transformer.3. Disconnect the H.V. wire of the H.V. rectifier assembly

from the magnetron.4. Remove one (1) screw holding capacitor holder to oven

cavity back plate.5. Disconnect the filament lead of the power transformer

from the H.V. capacitor.6. Remove one (1) screw holding earth side terminal of high

voltage rectifier assembly, and remove capacitor holder.7. Disconnect all the leads and terminals of high voltage

rectifier assembly from high voltage capacitor.

8. Disconnect the H.V. fuse from the high voltage capacitor.9. Now H.V. rectifier assembly, H.V. fuse and H.V. capaci-

tor should be free.

CAUTION: WHEN REPLACING HIGH VOLTAGE RECTI-FIER ASSEMBLY, ENSURE THAT THE CATH-ODE (EARTH) CONNECTION IS SECURELYFIXED TO THE CAPACITOR HOLDER WITHAN EARTHING SCREW.

CAUTION: DO NOT REPLACE ONLY HIGH VOLTAGERECTIFIER. WHEN REPLACING IT, RE-PLACE HIGH VOLTAGE RECTIFIER ASSEM-BLY.

Removal1. CARRY OUT 3D CHECKS.2. Disconnect the wire leads from the magnetron.3. Carefully remove the three (3) screws holding the mag-

netron to the waveguide flange.4. Lift up magnetron with care so that the magnetron

antenna is not hit by any metal object around antenna.5. Now, the magnetron is free.Re-install1. Re-install the magnetron to the waveguide flange with

MAGNETRON REPLACEMENT

1. CARRY OUT 3D CHECKS.2. Pull the wire leads from the oven lamp socket by pushing

the terminal hole of the oven lamp socket with the flat typesmall screw driver.

3. Tear the cushion from the light mount plate.4. Bend the tab of the light mount plate holding the oven.5. Lift up the oven lamp socket.6. Now, the oven lamp socket is free.

OVEN LAMP SOCKET REMOVALOven lamp socket

Terminal

Wire lead

Terminal holeFlate type small screw driver

Figure C-1. Oven lamp socket

POSITIVE LOCK® CONNECTOR REMOVAL

1. CARRY OUT 3D CHECKS.2. Pushing the lever of positive lock® connector.3. Pull out the positive lock® connector.

CAUTION: WHEN YOU (SERVICE ENGINEERS) CON-NECT THE POSITIVE LOCK® CONNECTORSTO THE TERMINALS, CONNECT THE POSI-TIVE LOCK® SO THAT THE LEVER FACEYOU (SERVICE ENGINEERS).

Terminal

Push

Pull down

1

2

Lever

Positive lock® connector

Figure C-2 Positive lock ® connector

three (3) screws.2. Re-connect the wire leads to the magnetron. Refer to

"PICTORIAL DIAGRAM".3. Re-install the outer case and check that the oven is

operating properly.

CAUTION: WHEN REPLACING THE MAGNETRON, BESURE THE R.F. GASKET IS IN PLACE ANDTHE MAGNETRON MOUNTING SCREWSARE TIGHTENED SECURELY.


20

TURNTABLE MOTOR REPLACEMENT

Removal1. Disconnect the oven from the power supply.2. Remove the turntable and turntable support from the

oven cavity.3. Turn the oven over.4. Cut the four (4) bridges holding the turntable motor cover

to the bottom plate with the cutting pliers as shown inFigure C-4.

CAUTION: DO NOT DROP THE TURNTABLE MOTORCOVER INTO THE OVEN AFTER CUTTINGTHE BRIDGES. BECAUSE IT WILL DAMAGETHE WIRE LEADS OF THE MOTOR AND IT ISDIFFICULT TO REMOVE IT OUT OF THEOVEN.

5. Remove the turntable motor cover from the bottom plate.6. Disconnect the wire leads from the turntable motor.7. Remove the single (1) screw holding the turntable motor

to the oven cavity.8. Remove the turntable motor from the oven cavity.

9. Remove the O-ring and washer from the turntable motor.10.Now, the turntable motor is free.

Re-install1. Remove the any sharp edges on the turntable motor

cover and the bottom plate with the cutting pliers.2. Re-install the O-ring.3. Apply the grease (Shinetsu silicone grease G-420 of

Sinetsu Chemical Co. Ltd. or Toray Silicone grease SH-14 of Toray Silicone Co., Ltd.) to the O-ring and the baseof the turntable motor shaft as shown in Figure C-5.

4. Re-install the turntable motor with the O-ring and washerto the oven cavity with the single (1) screw.

5. Re-connect the wire leads to the turntable motor.6. Insert the tab of the turntable motor cover into the hole of

the bottom plate as shown in Figure C-4.7. Re-install the turntable motor cover to the bottom plate

with one (1) screw XHTSD40P08RV0 orXFPSD40P08K00 as shown in Figure C-4.

Washer

O-ring

Base of turntable motor shaft

Turntable motor

O-ring

Washer

Apply grease here

Figure C-4. Turntable Motor CoverFigure C-5. Washer and O-ring Installation and

Grease Applying.

Bottom Plate

BridgesTurnrable Motor Cover

Tab

Hole

Cutting Pliers

Screw; XHTSD40P08RV0 or XFPSD40P08K00

Removal1. CARRY OUT 3D CHECKS.2. Remove the single (1) screw holding the green/yellow

wire to the oven cavity back plate (for R-241CWAA/ R-241CWAC).

3. Disconnect the brown wire lead of the power supply cordfrom the fuse holder, referring to the Figure C-3 (a).

4. Cut away the connector.5. Release the power supply cord from the rear cabinet,

referring to the Figure C-3 (b).6. Now, the power supply cord is free.

Re-install1. Insert the moulding cord stopper of power supply cord

into the square hole of the oven cavity back plate,referring to the Figure C-3 (b).

2. Install the earth wire lead of power supply cord to the ovencavity back plate with one (1) screw and tight the screw (forR-241CWAA/ R-241CWAC) .

3. Connect the brown wire lead of power supply cord to thefuse holder correctly, referring to the Pictorial Diagram.

4. Strip the blue wire lead of the power supply cord and wirelead of the main wire harness for 15mm lengh from its end.

5. Wind the conductor of the blue wire lead of the powersupply cord and the conductor of the wire lead of the mainwire harness each other.

6. Insert them into the connector. And clamp it.7. CARRY OUT 4R CHECKS.

POWER SUPPLY CORD REPLACEMENT

Figure C-3(a). Power Supply Cord Replacement Figure C-3 (b) Power Supply Cord Replacement

Power Supply Cord

Oven Cavity Back Plate

Square Hole

Moulding Cord Stopper

15 mm

Connector CE-230

Blue wire lead of power supply cord

Wire lead of the main wire harness

Conductor: Stripped portion

Connector CE-230

POWER SUPPLY CORD

OVEN CAVITY BACK PLATE

GREEN/YELLOW WIRE

SCREW

BLUE WIREFUSE HOLDER

OVEN CAVITY

BROWN WIREBLUE WIRE BROWN

WIRE



21

FAN MOTOR REPLACEMENT

REMOVAL1. CARRY OUT 3D CHECKS.2. Disconnect the wire leads from the fan motor.3. Remove the one (1) screw holding the chassis support to

the oven cavity front plate.4. Remove the chassis support .5. Release the filament lead of the power transformer and

the H.V. wire from the fan duct.6. Remove the one (1) screw holding the light mounting

plate to the oven cavity.7. Release the wire leads (to the oven lamp) from the hole

of the fan duct.8. Remove the one (1) screw holding the fan duct to the

waveguide flange.9. Release the fan motor assembly from the oven cavity.10.Remove the fan blade from the fan motor shaft according

to the following procedure.11.Hold the edge of the rotor of the fan motor by using a pair

of groove joint pliers.

CAUTION:• Make sure that any pieces do not enter the gap

between the rotor and the stator of the fanmotor. Because the rotor is easy to be shavenby pliers and metal pieces may be produced.

• Do not touch the pliers to the coil of the fanmotor because the coil may be cut or injured.

• Do not disfigure the bracket by touching withthe pliers.

12 Remove the fan blade assembly from the shaft of the fanmotor by pulling and rotating the fan blade with yourhand.

13 Now, the fan blade will be free.

CAUTION:• Do not re-use the removed fan blade because

the hole (for shaft) may be larger than normal.

14. Remove the two (2) screws holding the fan motor to thefan duct.

15. Now, the fan motor is free.

INSTALLATION

1. Install the fan motor to the fan duct with the two (2)screws.

2. Install the fan blade to the fan motor shaft according tothe following procedure.

3. Hold the center of the bracket which supports the shaftof the fan motor on the flat table.

4. Apply the screw lock tight into the hole (for shaft) of thefan blade.

5. Install the fan blade to the shaft of fan motor by pushingthe fan blade with a small, light weight, ball peenhammer or rubber mallet.

CAUTION:• Do not hit the fan blade strongly when installed

because the bracket may be transformed.• Make sure that the fan blade rotates smooth after

installed.• Make sure that the axis of the shaft is not slanted.

6. Install the fan motor assembly to the oven cavity byfitting the tabs of the fan duct into the holes of the ovencavity and the waveguide flange.

7. Re-install the light mounting plate to the oven cavity withthe one (1) screw.

8. Insert the end of the chassis support into the slit of theoven cavity rear cabinet.

9. Re-install the chassis support to the oven cavity frontplate with the one (1) screw.

10. Install the filament lead and the H.V. wire into the holeof the fan duct .

11. Re-install the wire leads (to the oven lamp) to the holeof the fan duct.

12. Connect the wire leads to the fan motor, referring to thepictorial diagram. Shaft

Table Center of bracket

Side View

Rear View

Gap

RotorBracket

Stator

Groove joint pliersCoil

1. CARRY OUT 3D CHECKS.2. Disconnect the leads and connectors from the control

unit.3. Remove the one (1) screw holding the chassis support to

the front plate of the oven cavity.4. Remove the chassis support from the oven.5. Lift up the control panel and release it from the oven

cavity.6. Now, the control panel assembly is free.

CONTROL PANEL ASSEMBLY REMOVAL

NOTE: 1. Before attaching a new key unit, wipe off remainingadhesive on the control panel frame surfacescompletely with a soft cloth soaked in alcohol.

2. When attaching the key unit to the control panelframe, adjust the upper edge and right edge of thekey unit to the correct position of control panelframe.

3. Stick the key unit firmly to the control panel frameby rubbing with soft cloth not to scratch.

Shaft

Axis

Stator

Rotor

These are the positions that should be pinched with pliers


22

1. CARRY OUT 3D CHECKS.2. Disconnect wire leads from the switches and control

panel.3. Remove the control panel assembly from the oven cavity

front flange. Refer to chapter "CONTROL PANEL AS-SEMBLY REMOVAL".

4. Remove two (2) screws holding latch hook to ovenflange.

5. Remove latch hook assembly from oven flange.6. To remove the secondary interlock switch.6-1. Pull out the 1st. latch switch from the latch hook, by

pushing outward on the tab that is holding the switch.But the switch will be caught by the bar of the latch hook.

6-2. Then pull out the switch while pushing the plunger of theswitch again.

6-3. Now the 1st. latch switch is free.7. To remove the monitor switch or 2nd. interlock relay

control switch.7-1. With pushing outward on the tab that is holding the

switch, turn the switch so that the pole is an axis.7-2. Pull out the switch from the latch hook. Do not break the

pole or tab of the latch hook.7-3. Now the switch is free.

Re-install1. Re-install each switch in its place. The 1st. latch switch

is in the lower position and the monitor switch is in themiddle position. The 2nd. interlock relay control switch is

1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR SWITCH REMOVAL

in the upper position.2. Re-connect wire leads to each switch. Refer to chapter

"Pictorial Diagram".3. Secure latch hook (with two (2) mounting screws) to oven

flange.4. Re-install the control panel assembly to the oven cavity

front flange.5. Re-connect wire leads to the control unit. Refer to chap-

ter "Pictorial Diagram".6. Make sure that monitor switch is operating properly and

check continuity of the monitor circuit. Refer to chapter"Test Procedure", and Adjustment Procedure below.

1. CARRY OUT 3D CHECKS.If the 1st. latch switch, 2nd. interlock relay control switch andmonitor switch do not operate properly due to amisadjustment, the following adjustment should be made.2. Loosen the two (2) screws holding the latch hook to the

flange of the oven front face.3. With the door closed, adjust latch hook by moving it back

and forth and up and down. In and out play of the doorallowed by the upper and lower position of the latch hookshould be less than 0.5mm. The horizontal position of thelatch hook should be adjusted so that the monitor switchis activated with the door closed. The vertical position ofthe latch hook should be adjusted so that the 2nd.interlock relay control switch and the 1st. latch switch areactivated with the door closed.

4. Secure the screws firmly.5. Check the operation of all switches. If each switch has

not activated with the door closed, loosen screw andadjust the latch hook position.

After adjustment, make sure of the following.1. In and out play of the door remains less than 0.5mm when

in the latched position. First check upper position of latchhook, pushing and pulling upper portion of door towardthe oven face. Then check lower portion of the latchhook, pushing and pulling lower portion of door towardthe oven face. Both results (play in the door) should beless than 0.5mm.

1ST. LATCH SWITCH, 2ND. INTERLOCK RELAY CONTROL SWITCH AND MONITOR SWITCH ADJUSTMENT

2. The 1st. latch switch and 2nd. interlock relay controlswitch interrupt the circuit before the door can be opened.

3. The monitor switch contacts close when the door isopened.

4. The contacts of 1st. latch switch and 2nd. interlock relaycontrol switch open within 1.6mm gap between right sideof cavity face plate and door when door is open.

5. Re-install outer case and check for microwave leakagearound the door with an approved microwave surveymeter. (Refer to Microwave Measurement Procedure.)

Figure C-6. Latch Switch Removal

Latch Hook

Monitor Switch

1st. Latch Switch


Pole

Pole

BarOutward

Outward

Tab

Tab

Latch Heads

Latch Hook

Door

Monitor Switch1st. Latch

Switch


Figure C-7. Latch Switch Adjustments


23

1. Door latch heads smoothly catch latch hook throughlatch holes and that latch head goes through center oflatch hole.

2. Deviation of door alignment from horizontal line of cavityface plate is to be less than 1.0mm.

3. Door is positioned with its face pressed toward cavityface plate.

4. Check for microwave leakage around door with an ap-proved microwave survey meter. (Refer to MicrowaveMeasurement Procedure.)

NOTE:The door on a microwave oven is designed to act asan electronic seal preventing the leakage of micro-wave energy from oven cavity during cook cycle. Thisfunction does not require that door be air-tight, mois-ture (condensation)-tight or light-tight. Therefore,occasional appearance of moisture, light or sensingof gentle warm air movement around oven door is notabnormal and do not of themselves, indicate a leak-age of microwave energy from oven cavity.

Figure C-9. Door Replacement

SEALER FILMInstallation1. Put the adhesive tape on the backing film of the sealer

film as shown in Fig. C-10.2. Tear the backing film by pulling the adhesive tape.3. Put the pasted side of the sealer film on the door panel

Figure C-10. Sealer film

DOOR REPLACEMENT

REMOVAL1. Disconnect the power supply cord.2. Open the door slightly.3. Insert a putty knife (thickness of about 0.5mm) into the

gap between the choke cover and corner portion of doorpanel as shown in Figure C-8 to free engaging parts.

4. Pry the principles of the lever and lift up the choke coverby inserting a putty knife in order shown in figure C-8.

5. Release choke cover from door panel.6. Now choke cover is free.

Figure C-8. Door Disassembly

7. Release two (2) pins of door panel from two (2) holes ofupper and lower oven hinges by lifting up.

8. Now, door panel is free from oven cavity.9. Remove the four (4) screws holding door panel to door

frame.10.Release door panel from ten (10) tabs of door frame and

remove door frame by sliding the door panel downward.11.Now, door panel with sealer film is free.12.Tear sealer film from door panel.13.Now, door panel is free.14.Slide latch head upward and remove it from door frame

with releasing latch spring from door frame and latchhead.

15.Now, latch head and latch spring are free.16.Remove door screen from door frame.17.Now, door screen is free.

RE-INSTALL1. Re-install door screen to door frame.2. Re-install latch spring to the head. Re-install latch spring

to the door frame. Re-install latch head to the door frame.3. Re-install door panel to door frame by fitting ten (10) tabs

of door frame to ten (10) holes of door panel.4. Hold the door panel to door frame with the four (4)

screws.5. Put sealer film on door panel. Refer to "Sealer Film" and

figure C-10, on how to handle the new film.6. Catch two (2) pins of door panel on two (2) hole of upper

and lower oven hinges.7. Re-install choke cover to door panel by pushing.Note: After any service to the door;(A) Make sure that 1st. latch switch, 2nd. interlock relay

control switch and monitor switch are operatingproperly. (Refer to chapter "Test Procedures".).

(B) An approved microwave survey meter should beused to assure compliance with proper microwaveradiation emission limitation standards.

After any service, make sure of the following :

12345

6

7

8

9 0q

w

Putty Knife

Door Frame

Choke Cover

Pin

PinLower Oven Hinge

Lower Oven Hinge

Upper Oven Hinge

Upper Oven Hinge

Door Panel

Choke Cover

Sealer filmBacking film

Adhesive tape


24

MICROWAVE MEASUREMENT

After adjustment of door latch switches, monitor switch anddoor are completed individually or collectively, the followingleakage test must be performed with a survey instrumentand it must be confirmed that the result meets the require-ments of the performance standard for microwave oven.

REQUIREMENTThe safety switch must prevent microwave radiation emis-sion in excess of 5mW/cm2 at any point 5cm or more fromexternal surface of the oven.

PREPARATION FOR TESTING:Before beginning the actual test for leakage, proceed asfollows;1. Make sure that the test instrument is operating normally

as specified in its instruction booklet.Important:Survey instruments that comply with the requirement forinstrumentations as prescribed by the performance stand-ard for microwave ovens must be used for testing.

Recommended instruments are:NARDA 8100NARDA 8200HOLADAY HI 1500SIMPSON 380M

2. Place the oven tray into the oven cavity.3. Place the load of 275 ± 15ml of water initially at 20 ± 5˚C

in the centre of the oven tray. The water container shouldbe a low form of 600 ml beaker with inside diameter ofapprox. 8.5cm and made of an electrically non-conduc-tive material such as glass or plastic.The placing of this standard load in the oven is importantnot only to protect the oven, but also to insure that anyleakage is measured accurately.

4. Close the door and turn the oven ON with the timer set forseveral minutes. If the water begins to boil before thesurvey is completed, replace it with 275ml of cool water.

5. Move the probe slowly (not faster that 2.5cm/sec.) alongthe gap.

6. The microwave radiation emission should be measuredat any point of 5cm or more from the external surface ofthe oven.

mW cm 2

mW cm 2

Microwave leakage measurement at 5 cm distance

SHARP


25

SCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. COOKING TIME PROGRAMMED.3. START KEY TOUCHED.

SCHEMATICNOTE: CONDITION OF OVEN1. DOOR CLOSED.2. CLOCK APPEARS ON DISPLAY. NOTE: " " indicates components with potential above 250V.

Figure O-1 Oven Schematic-OFF Condition

Figure O-2 Oven Schematic-ON Condition

PO

WE

R T

RA

NS

FO

RM

ER

MA

GN

ET

RO

N H

.V. R

EC

TIF

IER

TU

RN

TA

BLE

MO

TO

R

FA

N M

OT

OR

OV

EN

LA

MP

2ND. INTERLOCK RELAY CONTROL SWITCH M

ON

ITO

R S

WIT

CHC

ON

TR

OL

UN

IT

THERMAL CUT-OUT 125˚C (OVEN)

1ST. LATCH SWITCH

B1 B2A3

OL

FM

TT

M

THERMAL CUT-OUT 95˚C (MG)

N.O.

RY

-1

COM.

A1

RY

-2

2ND

. IN

TE

RLO

CK

R

ELA

Y

MO

NIT

OR

R

ES

IST

OR

0.

8/20

W

EA

RT

H

220V

˜ 50

Hz

BLU

BR

N

LIV

EN

EU

TR

AL

G-Y

FU

SE

M

8A

H.V

. FU

SE

0.

6A

EA

RT

H

220V

˜ 60

Hz

BLU

BR

N

LIV

EN

EU

TR

AL

G-Y

R-241CWAA R-241CWAC

for R-241CWAP (Peru)

for

CAPACITOR 0.94µF AC2000V CAPACITOR 0.75µF AC2100V


PO

WE

R T

RA

NS

FO

RM

ER

TU

RN

TA

BLE

MO

TO

R

FA

N M

OT

OR

OV

EN

LA

MP

2ND. INTERLOCK RELAY CONTROL SWITCH M

ON

ITO

R S

WIT

CHC

ON

TR

OL

UN

IT

THERMAL CUT-OUT 125˚C (OVEN)

1ST. LATCH SWITCH

B1 B2A3

THERMAL CUT-OUT 95˚C (MG)

N.O.

RY

-1

COM.

A1

RY

-2

2ND

. IN

TE

RLO

CK

R

ELA

Y

MO

NIT

OR

R

ES

IST

OR

0.

8/20

W

EA

RT

H

220V

˜ 50

Hz

BLU

BR

N

LIV

EN

EU

TR

AL

G-Y

FU

SE

M

8A

PO

WE

R T

RA

NS

FO

RM

ER

MA

GN

ET

RO

N H

.V. R

EC

TIF

IER

CAPACITOR 0.94µF AC2000V CAPACITOR 0.75µF AC2100V

H.V

. FU

SE

0.

6A

OL

FM

TT

M

EA

RT

H

220V

˜ 60

Hz

BLU

BR

N

LIV

EN

EU

TR

AL

G-Y

R-241CWAA R-241CWACfor




26

64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

Fig

ure

S-1

. Pic

toria

l Dia

gram

WH

T

RE

D

WH

T

HIG

H V

OLT

AG

E C

OM

PO

NE

NT

S

MA

GN

ET

RO

N

HIG

H

VO

LTA

GE

C

AP

AC

ITO

R

H.V

. R

EC

TIF

IER

MO

NIT

OR

S

WIT

CH

TU

RN

TA

BLE

M

OT

OR

FA

N M

OT

OR

OV

EN

LA

MP

&

SO

CK

ET

GR

Y

GR

Y

1ST

. LA

TC

H

SW

ITC

H

CO

M.

CO

M.

OR

G

GR

Y

OR

G

GR

YN

.C.

N.O

.G

RY

GR

Y

GR

Y

OR

G

WH

T

MO

NIT

OR

RE

SIS

TO

R

2ND

. IN

TE

RLO

CK

R

ELA

Y C

ON

TR

OL

S

WIT

CH

GR

YO

RG

PO

WE

R

TR

AN

SF

OR

ME

R

HIG

H V

OLT

AG

E

FU

SE

RE

DG

/Y

B

L U

B

R

N

EA

RT

H

LIV

E

for

R-2

41C

WA

A &

R-2

41C

WA

Cfo

r R

-241

CP

(P

eru

)

FU

SE

AN

D

HO

LDE

R

CO

NN

EC

TO

R

"N"

labe

l [fo

r R

-241

CW

AA

(A

rgen

tin

a) o

nly

]

NE

UTR

AL

PO

WE

R

SU

PP

LY

CO

RD

OV

EN

CA

VIT

Y

BA

CK

PLA

TE

Bla

ck M

ark

NO

TE

: N

uetr

al

(WH

T)

wire

m

ust

be

conn

ecte

d to

th

e te

rmin

al w

ith b

lack

mar

k on

the

oven

ligh

t soc

ket.

GR

Y

GR

NW

HT

WH

T

WH

T

N

CO

NT

RO

L U

NIT

GR

Y

RE

D

RE

DR

ED

BLK

TH

ER

MA

L C

UT

-OU

T

(MG

.)

TH

ER

MA

L C

UT

-OU

T

(OV

EN

)

OR

G

CN

-A

CN

-B

2G

RY

13

OR

GO

RG

GR

YG

RN

21

N.O

.

CO

M.

B

L U

B

R

N

LIV

EN

EU

TR

AL

PO

WE

R

SU

PP

LY

CO

RD

OV

EN

CA

VIT

Y

BA

CK

PLA

TE

GR

N

GR

N

IC-1

SP

30

RY

1

RE

LAY

CN

-B

21

CN

-A

31

RY

2

BLK

OR

G

RE

D


27

64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

Fig

ure

S-2

. Con

trol

Pan

el C

ircui

t

+ –

+ –

+

–

+ –

A3

A1

NO

B1

B2

COM

VRS1

a

b(J1)

d

c

31

42

RY

1

RY

2

T1

D1

D4

D2

D3

D1~

D4:

11E

S1

D20

D40

R22

56D21 D22

C1 0.1µ/50v

C2 470µ/25v

C3 0.01µ/16v

C4 47µ/16v

R2 1k

Q1 2SA933

R3 15kC5 0.1µ/50v

SP30

R1 9

10 1

/2w

R4

15k

R30 3.3k

R5 15k

D5

C6 0.01µ/16v

Q30

K

RA

101M

Q21

K

RC

243M

Q22

D

TA

143E

S

Q20

K

RA

101M

C21

10

µ/35

v

C20

0.1

µ/50

v

R41 4.7k

R40

15k

C40 0.01µ/16vR20 15k

VC

(J2) 3.3k

(J4)

(J6)

(J3) 4.3k

(J5)

(J7)

C70 0.01µ/16v

S12S11S10S 9S 8S 7S 6S 5S 4S 3S 2S 1C 3C 2C 1

C71 33p

R70 10kF

R57

15k

R58

15k

R59

15k

R60

15k

R64 220k

R80 15k

R63 220k

R62 220k

R61 220k

C64C63C62C61

C61

~C

64

330p

F/5

0v x

4 G10

G 9

G 8

G 7

G 6

G 5

G 4

G 3

G 2

G 1

R55 15k

R54 15k

R53 15k

R52 15k

R51 15k

R50 15k

0

97

85

6

1

2

43

Comie

nzo

MIinu

to Ex

tra

DESC

ONGE

LACION

AU

TOMA

TICA

Nive

l de

Pote

ncia

Deten

ción

Cance

lación

Cronóm

etro

Reloj

Plat

o Pr

incip

al

Verd

ura

Fres

ca

Pap

a A

sada

Verd

ura

Cong

elada

Arr

oz/

Pas

ta

Beb

ida

IC1 IZA906DR

142 40 22253035

105 15 21

SE

G 0

SE

G 1

SE

G 2

SE

G 3

SE

G 4

SE

G 5

SE

G 6

SE

G 7

SE

G 8

SE

G 9

SE

G10

SE

G11

R60

R61

R62

R63

AIN

0A

IN1

AIN

2A

IN3

VS

S

VD

DC

OM

4C

OM

3C

OM

2C

OM

1V

LCH

OLD

RE

SE

TX

OU

TX

INR

92R

91R

90R

83R

82R

81IN

T2

R73

R72

PU

LSE

R70

NO

TE

:IF

NO

T S

PE

CIF

IED

, 1/

4w ±

5%

IF N

OT

SP

EC

IFIE

D,

1SS

270A

(J2)

& (

J3):

R

esis

tor

3.3k

(J2

) an

d 4.

3K (

J3)

for

R-2

41C

WA

A/2

41C

WA

C

Ju

mpe

r w

ire (

J2)

and

open

(J3

) fo

r R

-241

CW

AP

(P

eru

)

AC

220V

50H

z fo

rR-2

41C

WA

A

R

-241

CW

AC

60H

z fo

rR

-241

CW

AP

OV

EN

LA

MP

T

UR

NT

AB

LE

MO

TO

R

FA

N M

OT

OR

2ND

. IN

TE

RLO

CK

R

ELA

Y

CO

NT

RO

L

SW

ITC

H

MIC

RO

CO

NT

RO

L U

NIT

KE

Y U

NITC

OO

KD

EF

K

G

QT

YC

HE

CK

LIQ

UID

CR

YS

TA

L D

ISP

LAY

ZD1 HZ4C3


28

64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

Figure S-3. Printed Wiring Board

12

5

7

R2

R80

R3E

E E

B

B

3

1

1

13

2

2

4

SP

B

Q1

Q22

D22

Q30

R59R60

R58R57R40

R4

C40

D3

D20D40

CN - B

AC (N) FM TTM OLRY1DOOR SW

C4

C6

C71

D5

C3

ZD

1R

1R

30 SP

30

C5

R70

C70

(CF

1)

R41

R51

R50

R52

R54

R53

R55

DIP

22

B

B

Q20

Q21

VR

S1

C21

D1

D4

D2

C2

C1

T1

C20R

20R5

RY

2

D21

10E

E

6

42

1IC

1

4

21

9

31R61

R62

R63

R64

C61

C63

C64

C62

2

,F 11(J7)(J5)(J3)

(J6)(J4)(J2)

(J1)

8

R

+

+

+

+


29

PARTS LISTNote: The parts marked " ∆" may cause undue microwave exposure.

The parts marked "*" are used in voltage more than 250V.

REF. NO. PART NO. DESCRIPTION Q'TY CODE

******

∆*

***

*

ELECTRIC PARTS1- 1 QSW-MA131WRE0 1st. latch switch & 2nd. interlock relay control switch 2 AG1- 2 QSW-MA132WRE0 Monitor switch 1 AH1- 3 QACC-A102WRE0 Power supply cord for Argentina [R-241CWAA] 1 AU1- 3 QACC-A077WRE0 Power supply cord for Chile [R-241CWAC] 1 AT1- 3 QACC-A058WRE0 Power supply cord for Peru [R-241CWAP] 1 AQ1- 4 QSOCLA022WRE0 Oven lamp socket 1 AG1- 5 FH-DZA082WRK0 High voltage rectifier 1 AQ1- 6 RC-QZA168WRE0 High voltage capacitor 0.94 µF/2000V for Argentina [R-241CWAA] 1 AV1- 6 RC-QZA126WRE0 High voltage capacitor 0.94 µF/2000V (Interchangeable) [R-241CWAA] 1 AX1- 6 RC-QZA168WRE0 High voltage capacitor 0.94 µF/2000V for Chile [R-241CWAC] 1 AV1- 6 RC-QZA126WRE0 High voltage capacitor 0.94 µF/2000V (Interchangeable) [R-241CWAC] 1 AX1- 6 RC-QZA135WRE0 High voltage capacitor 0.75 µF/2100V for Peru [R-241CWAP] 1 AV1- 7 RMOTEA340WRE0 Fan motor for Argentina [R-241CWAA] 1 AX1- 7 RMOTEA362WRE0 Fan motor (Interchangeable)for Argentina [R-241CWAA] 1 AY1- 7 RMOTEA340WRE0 Fan motor for Chile [R-241CWAC] 1 AX1- 7 RMOTEA362WRE0 Fan motor (Interchangeable)for Chile [R-241CWAC] 1 AY1- 7 RMOTEA362WRE0 Fan motor for Peru [R-241CWAP] 1 AY1- 7 RMOTEA291WRE0 Fan motor (Interchangeable) for Peru [R-241CWAP] 1 AX1- 8 RV-MZA284WRE0 Magnetron 1 BR1- 9 RLMPTA069WRE0 Oven lamp 1 AK1- 9 RLMPTA029WRE0 Oven lamp (Interchangeable) 1 AL1-10 RMOTDA173WRE0 Turntable motor 1 AX1-10 RMOTDA226WRE0 Turntable motor (Interchangeable) 1 AT1-11 RTHM-A078WRE0 Thermal cut-out 125˚C 1 AK1-12 RTRN-A563WRE0 Power transformer 220V/50Hz for Argentina [R-241CWAA] 1 BP1-12 RTRN-A563WRE0 Power transformer 220V/50Hz for Chile [R-241CWAC] 1 BP1-12 RTRN-A565WRE0 Power transformer 220V/60Hz for Peru [R-241CWAP] 1 BN1-13 RR-WZA022WRE0 Monitor resistor 0.8 Ω 20W 1 AK1-14 QFS-IA004WRE0 H.V. fuse 0.6A 1 AK1-15 QFSHDA019WRE0 Fuse holder 1 AH1-16 QFS-CA010WRE0 Fuse M8A 1 AE1-17 RTHM-A079WRE0 Thermal cut-out 95˚C 1 AL

CABINET PARTS2- 1 GCABUA696WRP0 Outer case cabinet 1 AY2- 2 FDAI-A203WRY0 Bottom plate 1 BB2- 3 GLEGPA074WRE0 Foot 2 AC

CONTROL PANEL PARTS3- 1 CPWBFA813WRK0 Control unit for Argentina [R-241CWAA] 1 BG3- 1 CPWBFA813WRK0 Control unit for Chile [R-241CWAC] 1 BG3- 1 CPWBFA812WRK0 Control unit for Peru [R-241CWAP] 1 BF3- 1A QCNCMA431DRE0 2-pin connector (A) 1 AC3- 1B QCNCMA275DRE0 2-pin connector (B) 1 ABC1 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AAC2 VCEAB31EW477M Capacitor 470 uF 25V 1 ACC3 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AAC4 VCEAB31CW476M Capacitor 47 uF 16V 1 AAC5 RC-KZA087DRE0 Capacitor 0.1 uF 50V 1 AAC6 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AAC20 VCEAB31HW104M Capacitor 0.1 uF 50V 1 AMC21 VCEAB31VW106M Capacitor 10 uF 35V 1 AAC40 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AAC61-64 VCKYD11HB331K Capacitor 330 pF 50V 4 AAC70 VCKYD11CY103N Capacitor 0.01 uF 16V 1 AAC71 VCCCF61HH330J Capacitor 33 pF 50V 1 ABD1-4 VHD11ES1///-1 Diode (11ES1) 4 ABD5 VHD1SS270A/-1 Diode (1SS270A) 1 AAD20-22 VHD1SS270A/-1 Diode (1SS270A) 3 AAD40 VHD1SS270A/-1 Diode (1SS270A) 1 AAIC1 RH-IZA906DRE0 LSI 1 AMQ1 VS2SA933S//-3 Transistor (2SA933) 1 ABQ20 VSKRA101M//-3 Transistor (KRA101M) 1 ABQ21 VSKRC243M//-3 Transistor (KRC243M) 1 ACQ22 VSDTA143ES/1B Transistor (DTA143ES) 1 AAQ30 VSKRA101M//-3 Transistor (KRA101M) 1 ABR1 VRD-B12HF911J Resistor 910 ohm 1/2W 1 AA


30

Note: The parts marked " ∆" may cause undue microwave exposure.The parts marked "*" are used in voltage more than 250V.


∆∆

∆

∆

∆

R2 VRD-B12EF102J Resistor 1.0k ohm 1/4W 1 AAR3-5 VRD-B12EF153J Resistor 15k ohm 1/4W 3 AAR20 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AAR30 VRD-B12EF332J Resistor 3.3k ohm 1/4W 1 AAR40 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AAR41 VRD-B12EF472J Resistor 4.7k ohm 1/4W 1 AAR50-55 VRD-B12EF153J Resistor 15k ohm 1/4W 6 AAR57-60 VRD-B12EF153J Resistor 15k ohm 1/4W 4 AAR61-64 VRD-B12EF224J Resistor 220k ohm 1/4W 4 AAR70 VRN-B12EK103F Resistor 10k ohm 1/4W 1 AAR80 VRD-B12EF153J Resistor 15k ohm 1/4W 1 AA(J2) VRD-B12EF332J Resistor 3.3k ohm 1/4W for Argentina [R-241CWAA] 1 AA(J2) VRD-B12EF332J Resistor 3.3k ohm 1/4W for Chile [R-241CWAC] 1 AA(J3) VRD-B12EF432J Resistor 4.3k ohm 1/4W for Argentina [R-241CWAA] 1 AA(J3) VRD-B12EF432J Resistor 4.3k ohm 1/4W for Chile [R-241CWAC] 1 AARY1 RRLY-A111DRE0 Relay (JV12S-KT) 1 ALRY2 RRLY-A094DRE0 Relay (OMIF-S-112LM) 1 ANSP30 RALM-A014DRE0 Buzzer (PKM22EPT-CA) 1 AGT1 RTRNPA114DRE0 Transformer 1 ASVRS1 RH-VZA032DRE0 Varistor (10G471K) 1 AEZD1 VHEHZ4C3///-1 Zener diode (HZ4C-3) 1 AA3- 2 FPNLCB454WRK0 Control panel frame with key unit and LCD 1 BC3- 2-1 FUNTKA957WRE0 Key unit 1 AY3- 2-2 RLCDSA062DRE0 Liquid crystal display 1 AM3- 3 QCNC-A012WRE0 Rubber connector 1 AF3- 4 XEPSD30P08XS0 Screw; Control unit mtg. 4 AA

OVEN PARTS4- 1 PHOK-A105WRF0 Latch hook 1 AL4- 2 LANGQA477WRW0 Light mount plate 1 AY4- 3 PCUSUA502WRP0 Waterproof cushion 1 AD4- 4 LBNDKA038WRP0 Capacitor holder 1 AF4- 5 NFANJA029WRE0 Fan blade 1 AK4- 6 PDUC-A694WRF0 Fan duct 1 AG4- 7 FOVN-A415WRT0 Oven cavity 1 BL4- 8 GLEGPA073WRF0 Leg 1 AD4- 9 LANGTA318WRP0 Chassis support 1 AE4-10 PCUSGA389WRP0 Cushion 1 AG4-11 PCOVPA276WRE0 Waveguide cover 1 AM4-12 PCUSUA500WRP0 Cushion 1 AC4-13 PPACGA097WRE0 O-ring 1 AG4-14 PCUSUA443WRP0 Cushion 1 AE

DOOR PARTS5- 1 FDORFA321WRT0 Door panel 1 AT5- 2 GWAKPA628WRF0 Door frame 1 AY5- 3 HPNL-A688WRR0 Door screen 1 AV5- 4 LSTPPA175WRF0 Latch head 1 AE5- 5 MSPRTA084WRE0 Latch spring 1 AB5- 6 PSHEPA622WRE0 Sealer film 1 AG5- 7 GCOVHA390WRF0 Choke cover 1 AK5- 8 XCPSD40P08000 Screw : 4mm x 8mm 4 AA

MISCLANEOUS6- 1 FROLPA090WRK0 Turntable support 1 AQ6- 2 NTNT-A094WRE0 Turntable 1 AN6- 3 TINSSA010WRR0 Instruction book 1 AF6- 4 FW-VZB605WRE0 Switch harness 1 AH6- 5 FW-VZB688WRE0 Main wire harness 1 AU6- 6 TCAUAA247WRR0 Argentina caution label for Argentina [R-241CWAA] 1 AD6- 6 TCAUHA214WRR0 K caution label for Chile [R-241CWAC] 1 AC6- 6 TCAUHA214WRR0 K caution label for Peru [R-241CWAP] 1 AC6- 7 TSPCNC800WRR0 Rating label for Argentina [R-241CWAA] 1 AD6- 7 TSPCNC799WRR0 Rating label for Chile [R-241CWAC] 1 AD6- 7 TSPCNC801WRR0 Rating label for Peru [R-241CWAP] 1 AD6- 8 QTANP0020YBE0 Connector 1 AA6- 9 TLABSA029WRR0 M8A label 1 AC6-10 TLABSA081WRR0 Argentina label for Argentina [R-241CWAA] 1 AD6-11 TCAUAA231WRR0 AC cord caution for Argentina [R-241CWAA] 1 AF6-12 QW-QZA177WRE0 Earth wire for Peru [R-241CWAC] 1 AK


31

HOW TO ORDER REPLACEMENT PARTS

To have your order filled prompty and correctly, please furnish the following information.

1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION

PACKING AND ACCESSORIES


6-13 TLABPA032WRR0 Earth label for Peru [R-241CWAC] 1 AG6-14 TLABSA073WRR0 N label for Argentina [R-241CWAA] 1 AB

SCREWS AND WASHERS7- 1 XHPSD40P08K00 Screw : 4mm x 8mm for Argentina [R-241CWAA] 7 AA7- 1 XHPSD40P08K00 Screw : 4mm x 8mm for Chile [R-241CWAP] 7 AA7- 1 XHPSD40P08K00 Screw : 4mm x 8mm for Peru [R-241CWAP] 6 AA7- 2 LX-EZA042WRE0 Special screw 2 AB7- 3 LX-WZA028WRE0 Special washer 1 AB7- 4 LX-CZA078WRE0 Special screw 4 AC7- 5 XHTSD40P08RV0 Screw : 4mm x 8mm 5 AA7- 6 XHPSD30P06000 Screw : 3mm x 6mm 1 AA7- 7 XOTSD40P12RV0 Screw : 4mm x 12mm 3 AA7- 8 XOTSD40P12000 Screw : 4mm x 12mm 5 AA7- 9 XOTSE40P08000 Screw : 4mm x 8mm 4 AA7-10 LX-CZA076WRE0 Special screw 2 AC7-11 LX-CZ0052WRE0 Special screw 2 AA7-12 XHPSD30P10000 Screw : 3mm x 10mm 1 AA

TURNTABLE TRAY

TURNTABLE SUPPORTINTO THE OVEN CAVITY

Not replaceable items.TRAY PAD ASSY

(CPADBA244WRK0)

PACKING CASE

MICROWAVE OVEN

TOP PAD ASSEMBLY

FPADBA377WRK0

POLYETHYLENG BAG

SSAKHA014WRE0

DOOR PROTECTION SHEET

SPADPA580WRE0

SPAKCD283WRE0 [R-241CWAC] SPAKCD284WRE0 [R-241CWAA] SPAKCD285WRE0 [R-241CWAP]

BOTTOM PAD ASSEMBLY

FPADBA378WRK0

INSTRUCTION BOOK


32

64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

OVEN AND CABINET PARTS 7-4

2-1 7-4

7-4

7-4

7-9

7-54-6

1-16

1-15

4-4

1-144-9

7-1

7-8

7-11

7-1

7-1

1-12

7-107-7

7-10

4-1

2-2

7-7

2-3

2-3

7-2

4-13

7-3

1-10

6-4

7-5

1-7

1-1

1-1

1-2

1-6

1-5

7-9

7-12

7-1

7-1

1-8

6-7

7-8

1-11

1-17

1-9

1-4

4-31-13

4-24-14

4-10

4-7

4-11

6-2

6-1

4-12

4-8

6-6

1-31-3

for R-241CWAA/CWAC

4-5

7-8

7-6

6-9

7-8

6-10

6-11

6-13

6-12


33

64 51 2 3

64 51 2 3

A

B

C

D

E

F

G

H

A

B

C

D

E

F

G

H

CONTROL PANEL PARTS

DOOR PARTS

MISCELLANEOUS

5-3

5-5

5-2

5-4

5-8

5-8

6-5 6-8

6-4

5-6

5-7

5-1

Actual wire harness may be different than illustration.

3-23-2-2

3-2-1

3-33-1

3-4

3-4

3-4

Before attaching Control unit to Control panel, foil side of Control unit must be cleaned by ethyl-alcohol.


34

'99SHARP CORP. (7S0.120E) Printed in U.S.A.

R-241CWAA R-241CWAC R-241CWAP SERVICE …archivos.diagramas.mx/otros/R241CWA.pdf · R-241CWAA...

Documents

Transcript of R-241CWAA R-241CWAC R-241CWAP SERVICE …archivos.diagramas.mx/otros/R241CWA.pdf · R-241CWAA...