Sharp R-671(B) Service Manual Download Page 32

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R-671 - 31

TEST DATA AT A GLANCE

PARTS

SYMBOL

VALUE / DATA

Special fuse

15A / 250V

Fuse

F 8A

Thermal cut-out (HVT)

TC1

145

C Off / 115˚C On

Thermal cut-out (OVEN)

TC2

150

C Off / 130˚C On

Grill heating element (top)

GH1

Approx. 76

Ω

/ Insulation resistance > 10 M

Ω

Bottom heating element

GH2

Approx. 132

Ω

/ Insulation resistance > 10 M

Ω

Oven lamp

230–240 V 25W

High voltage capacitor

AC 2100V 1.02

Magnetron

Filament < 1

Ω

/ Filament – chassis

∞

ohm.

Power transformer

Filament winding < 1

Ω

Secondary winding Approx. 143

Ω

/ Primary winding Approx. 2.6

Ω

WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE.

Summary of Contents for R-671(B)

Page 1: ...N O020URR0 Pizza Button 1 AD S10212R671EHW SERVICE MANUAL SHARP CORPORATION MICROWAVE OVEN WITH TOP AND BOTTOM GRILL MODEL R 671 W F In interests of user safety the oven should be restored to its original condition and only parts identical to those specified should be used SUPPLEMENT This service manual covers only those items that differ from the S10808R671EHW R 671 W Kg AUTO AUTO DEF COOK WATT K...

Page 2: ...A GLANCE 31 WIRING DIAGRAM 32 PICTORIAL DIAGRAM 35 CONTROL PANEL CIRCUIT 36 PRINTED WIRING BOARD 37 PARTS LIST 38 CABINET AND UNIT CHASSIS PARTS 41 CONTROL PANEL DOOR PARTS 42 MISCELLANEOUS PACKING AND ACCESSORIES 43 S10808R671EHW SERVICE MANUAL SHARP CORPORATION Kg AUTO AUTO DEF COOK WATT Kg STOP 1min R 671 MICROWAVE OVEN WITH TOP AND BOTTOM GRILL MODELS In interests of user safety the oven shoul...

Page 3: ...käytetään tai jos se kytketään väärin Kaikkien mikroaaltoliitäntöjen sekä syöttö että ulostulopuolella aaltoputkien laippojen ja tiivisteiden tulee olla varmistettuja Mikroaaltouunnia ei koskaan saa käyttää ilman kuormaa jossa mikroaaltoenergiaa kuluu Avoimeen aaltoputkeen tai antenniin ei koskaan saa katsoa virran ollessa kytkettynä ADVARSEL MIKROBØLGESTRÅLING Personell må ikke utsettes for mikro...

Page 4: ...liminated and the excess heat generated on adjacent components It can cause permanent damage or fire SHARP CORPORATION OSAKA JAPAN SERVICE MANUAL MICROWAVE OVEN WITH TOP AND BOTTOM GRILL R 671 B R 671 W R 671 IN GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp Service engineers with Operation and Service Information It is recommended that service engineers carefull...

Page 5: ...en stroom kunnen voortbrengen Contact met de volgende onderdelen kan elektrocutie tot gevolg hebben Hoogspanningscondensator hoogspanningstransformator magnetron hoogspanningsgelijkrichter hoogspannings kabelboom VERGEET DE VOLGENDE 3 STAPPEN NIET 1 Haal de stekker uit het stopcontact 2 Open de deur en zorg ervoor dat hij niet dicht kan vallen 3 Ontlaad de hoogspanningscondensator PAS OP VOOR DE E...

Page 6: ...os minutos temporizador a cero compruebe cuidadosamente que el agua se ha calentado Si el agua permaneciese fría efectúe las comprobaciones 3D y vuelva a examinar las conexiones de los componentes que han sido probados Cuando haya terminado la intervención en el equipo y el horno haya sido ensamblado de nuevo completamente deberá comprobar la potencia de salida de microondas y realizar una prueba ...

Page 7: ...eguire i tre controlli sopra citati e quindi scollegare i connettori dal primario del trasformatore Assicurarsi che tali connettori non vengano a contatto con altri componenti ne con il telaio del forno fare uso se necessario di nastro isolante Al termine dell intervento eseguire nuovamente i tre controlli e ricollegare i conduttori al primario del trasformatore QUATTRO VERIFICHE IMPORTANTI DA NON...

Page 8: ...e Dimensions Width 450 mm Height 298 mm including foot Depth 392 mm Cooking Cavity Dimensions Width 296 mm Height 203 mm Depth 297 mm Turntable diameter 275 mm Control Complement Touch Control System Clock 1 00 12 59 or 0 00 23 59 Timer 0 90 minutes Microwave Power for Variable Cooking Repetition Rate 100 Full power throughout the cooking time 70 approx 70 of FULL Power 50 approx 50 of FULL Power ...

Page 9: ...cator 3 LESS MORE indicator 4 CLOCK indicator 5 COOK indicator 6 AUTO indicator light It will light during automatic operation OPERATION BUTTONS 7 LESS MORE buttons 8 PIZZA button 9 AUTO COOK button 10 AUTO DEFROST button 11 COOKING MODE selector MICROWAVE cooking DUAL cooking GRILL cooking 12 WATT button 13 TIME WEIGHT dial 14 CLOCK setting button 15 STOP button 16 1 min START button 17 DOOR OPEN...

Page 10: ...lays RY1 RY2 RY5 go back to their home position The circuits to the oven lamp high voltage transformer fan motor and turntable motor are cut off 5 When the oven door is opened during a cooking cycle the switches come to the following condition Switch Contact Condition During Oven Door Cooking Open No cooking COM NO Closed Opened Primary latch Switch COM NC Opened Closed Stop switch COM NO Closed O...

Page 11: ...udible signal sounds and the contacts of relays RY1 RY3 RY4 are opened then the grill heating element top bottom heating element turntable motor and oven lamp are de energized 6 The relay RY5 stays closed for five 5 minutes and the fan motor operates DUAL COOKING CONDITION The oven has two dual cooking mode One is MICRO WAVE AND TOP GRILL mode and other one is MICRO WAVE AND BOTTOM GRILL mode In b...

Page 12: ...more same cooking modes are carried out the limitations of power output are not carried out after the total cooking time beyond the specified cooking time 4 In case of the two or more different cooking modes are carried out the specified cooking time is started to countfromthepointwhenthecookingmodeischanged 5 If the cooking mode has the power level display the power level is also displayed when t...

Page 13: ...2 will open at 150 C causing the oven to shut down The thermal cut out will cut back in at 130 C TURNTABLE MOTOR TTM The turntable motor drives the turntable roller assembly to rotate the turntable FAN MOTOR FM The fan motor drives a blade which draws external cool air This cool air is directed through the air vanes sur rounding the magnetron and cools the magnetron This air is channelled through ...

Page 14: ...e the door Display does not operate properly when STOP button is pressed Oven does not start when the START button is pressed Display operates Oven lamp does not light Turntable motor operates Fan motor does not operate Oven lamp lights Turntable motor does not operate Oven lamp lights Oven or electrical parts does not stop when cooking time is 0 or STOP button is pressed Oven goes into cook cycle...

Page 15: ...The oven and the empty vessel are at ambient temperature prior to the start the test 3 Temperature of the water The initial temperature of the water is 10 2 C 4 Selecttheinitialandfinalwatertemperaturesothatthemaximumdifferencebetweenthefinalwater temperature and the ambient temperature is 5K 5 Select stirring devices and measuring instruments in order to minimize addition or removal of heat 6 The...

Page 16: ...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 THEMEASURINGINSTRUMENTMUSTHAVEAVOLTAGEATLEAST6VOLTS BECAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIRECTIONS CARRY OUT 3D CHECKS Disconnect the leads...

Page 17: ...nals as described in the below Table Thermal Cut out Test Temperature of ON Temperature of OFF Indication of ohmmeter Parts Name condition closed circuit condition open circuit Whenroomtemperature C C is approx 20 C Thermal cut out 145 C Cuts back in at 115 C Above 145 C Closed circuit Thermal cut out 150 C Cuts back in at 130 C Above 150 C Closed circuit If incorrect readings are obtained replace...

Page 18: ...bed in the table below Table Resistance of Motor Motors Resistance Fan motor Approximately 300 Ω Turntable motor Approximately 14 9 kΩ If incorrect readings are obtained replace the motor CARRY OUT 4R CHECKS K GRILL HEATING ELEMENT TOP AND BOTTOM HEATING ELEMENT TEST CARRY OUT 3D CHECKS Before carrying out the following tests make sure the heating element is cool completely 1 Resistance of heating...

Page 19: ...ght up g The figure of all digits flicker h When touching a tact switch the control unit does not respond 6 Other possible problems caused by defective control unit a Buzzer does not sound or continues to sound b Cooking is not possible L TOUCH CONTROL PANEL ASSEMBLY TEST M TACT SWITCH TEST 1 Disconnect the oven from the power supply 2 Discharge the high voltage capacitor 3 Remove the control unit...

Page 20: ...w 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 CARRY OUT 3D CHECKS BEFORE REPAIR 4 Pattern at a and b are broken Insert the coil RCILF2003YAZZ between c and d CARRY OUT 3D CHECKS BEFORE REPAIR NOTE At the time of these repairs make a visual inspection of the varistor for burning da...

Page 21: ... potentiometer cir cuit and indicator circuit 1 LSI This LSI controls the tact switch strobe signal encoder signal potentiometer signal relay driving signal for oven function and indicator signal 2 Power Source Circuit This circuit generates voltage necessary in the control unit Symbol Voltage Application VC 5 0V LSI IC1 3 Synchronizing Signal Circuit The power source synchronizing signal is avail...

Page 22: ...gh voltage circuit driving signal To turn on and off the cook relay RY2 In 100 POWER operation the signals hold L level during microwave cooking and H level while not cooking In other cooking modes 70 50 30 10 the signal turns to H level and L level in repetitionaccordingtothepower level 20 22 P46 P44 OUT Terminal not used 23 INT1 IN Signal coming from encoder When the encoder is turned the contac...

Page 23: ...minal not used 41 P17 IN Signalcoming from touch tact switch When any one of tact switches SW1 SW4 SW7 on key and jog unit matrix is touched a corresponding signal from P25 P27 will be input into P17 When no tact switch is touched the signal is held at H level 42 P16 IN Signal similar to P17 When any one of tact switches SW2 SW5 SW8 on key and jog unit matrix is touched a corresponding signal will...

Page 24: ...while keeping it connected to the oven B On some models the power supply cord be tween the touch control panel and the oven proper is so long enough that they may be separated from each other For those models therefore it is possible to check and repair the controls of the touch control panel while keeping it apart from the oven proper in this case you must short both ends of the door sensing swit...

Page 25: ...er High volt age capacitor and High voltage rectifier assem bly 2 Hot parts Top heating element Bottom heating element Oven lamp Magnetron High voltage transformer and Oven cavity 3 Sharp edge Bottom plate Oven cavity Weveguide flange Chassis support and other metallic plate 4 Movable parts to prevent a fault Fan blade Fan motor Switch Open lever Open button 3 Do not catch the wire leads in the ou...

Page 26: ...ss and the stop switch harness from the control unit 3 Remove the one 1 screw holding the control panel to the oven cavity front flange 4 Remove the control panel assembly from the oven 5 Disconnect the cable from the connector CN C CONTROL PANEL ASSEMBLY REMOVAL TURNTABLE MOTOR REPLACEMENT 2 Re install the turntable motor by locating shaft onto coupling then fitting it to the oven cavity with 1 o...

Page 27: ...r by pushing the fan blade with a small light weight ball peen hammer or rubber mallet CAUTION Do not hit the fan blade when installing be cause the bracket may be deformed Make sure that the fan blade rotates smoothly after installation Make sure that the axis of the shaft is not slanted 2 Install the fan motor to the power angle with the two 2 screws 3 Re connect the wire leads to the fan motor ...

Page 28: ...ower Supply Cord Replacement POWER SUPPLY CORD POWER ANGLE GREEN YELLOW WIRE BLUE WIRE BROWN WIRE NOISE FILTER SCREW L TP F 8 A TL RED 15 A WHT N CHASSIS SUPPORT POWER SUPPLY CORD MOULDING CORD STOPPER POWER ANGLE SQUARE HOLE BOTTOM HEATING ELEMENT REMOVAL 1 CARRY OUT 3D CHECKS 2 Remove the turntable motor cover from the power angle referring to TURNTABLE MOTOR REPLACE MENT 3 Disconnect the wire l...

Page 29: ...tothe gap between the choke cover and door PANEL as shown in Figure C 7 to free engaging parts 5 Release choke cover from door panel 6 Now choke cover is free Figure C 7 Door Disassembly head 12 Now latch head and latch spring are free 13 Remove the two 2 screws holding the glass stopper to the door frame 14 Remove the glass stopper from the door frame 15 Slide the front door glass leftwards and t...

Page 30: ...e of cavity face plate is to be less than 1 0mm 3 Door is positioned with its face pressed toward cavity face plate 4 Check for microwave leakage around door with an approved microwave survey meter Refer to Micro wave Measurement Procedure Note The door on a microwave oven is designed to act as an electronic seal preventing the leakage of microwave energy from oven cavity during cook cycle This fu...

Page 31: ...ve ovens must be used for test ing Recommended instruments are NARDA 8100 NARDA 8200 HOLADAY HI 1500 SIMPSON 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 should be a low form of 600 ml beaker with inside diameter of approx 8 5cm and made of an electrically non conductive material such as...

Page 32: ...g element top GH1 Approx 76 Ω Insulation resistance 10 MΩ Bottom heating element GH2 Approx 132 Ω Insulation resistance 10 MΩ Oven lamp OL 230 240 V 25W High voltage capacitor C AC 2100V 1 02µF Magnetron MG Filament 1Ω Filament chassis ohm Power transformer T Filament winding 1Ω Secondary winding Approx 143 Ω Primary winding Approx 2 6 Ω WARNING DISCONNECT THE PLUG WHEN MEASURING RESISTANCE ...

Page 33: ... 680 k 0 5W 0 22µ 250V F1 FUSE 15A F2 FUSE F8A NOISE FILTER L N 230V 50Hz BRN 15 BLU 15 G Y 15 EARTH LIVE NEUTRAL NC NC RY1 RY4 RY3 RY2 OL FM TTM OVEN LAMP FAN MOTOR TURNTABLE MOTOR GH1 GRILL HEATING TOP ELEMENT GH2 BOTTOM HEATING ELEMENT H V RECTIFIER MG MAGNETRON T HIGH VOLTAGE TRANSFORMER T C TRANSFORMER C CAPACITOR 1 2µF AC2100V CONTRL OUNIT A7 RY6 RY5 COM COM COM N O A9 N O N O A3 A1 B2 A5 B1...

Page 34: ...700p 250V 10M 0 5W NOISE SUPPRESSION COIL 680 k 0 5W 0 22µ 250V F1 FUSE 15A F2 FUSE F8A NOISE FILTER L N EARTH NC NC RY1 RY4 RY3 RY2 230V 50Hz BRN 15 BLU 15 G Y 15 EARTH LIVE NEUTRAL OL FM TTM OVEN LAMP FAN MOTOR TURNTABLE MOTOR GH1 GRILL HEATING TOP ELEMENT GH2 BOTTOM HEATING ELEMENT H V RECTIFIER MG MAGNETRON T HIGH VOLTAGE TRANSFORMER T C TRANSFORMER C CAPACITOR 1 2µF AC2100V CONTROL UNIT A7 RY...

Page 35: ...0M 0 5W NOISE SUPPRESSION COIL 680 k 0 5W 0 22µ 250V F1 FUSE 15A F2 FUSE F8A NOISE FILTER L N NC NC RY1 RY4 RY3 RY2 230V 50Hz BRN 15 BLU 15 G Y 15 EARTH LIVE NEUTRAL GH1 GRILL HEATING TOP ELEMENT OL FM TTM OVEN LAMP FAN MOTOR TURNTABLE MOTOR GH1 GRILL HEATING TOP ELEMENT GH2 BOTTOM HEATING ELEMENT H V RECTIFIER MG MAGNETRON T HIGH VOLTAGE TRANSFORMER T C TRANSFORMER C CAPACITOR 1 2µF AC2100V CONTR...

Page 36: ... WHT 6 7 BLU 8 9 YLW COM GRY YLW WHT WHT RED GRY N C NC COM SW2 STOP SWITCH CONTROL UNIT NO COM GH1 TOP GRILL HEATING ELEMENT GH2 BOTTOM HEATING ELEMENT ORG WHT WHT RED WHT GRN GRN GRN BRU RED ORG WHT TTM TURNTABLE MOTOR SW3 MONITOR SWITCH SW1 PRIMARY LATCH SWITCH GRY ORG BLK RED RED BRN G R Y Y L W BLK BLK WHT CN A CN A 1 1 9 1 1 11 2 CN B CN B T1 CN C 2 RED GRN RED RED BLU G Y WHT WHT POWER SUPP...

Page 37: ... 77 COM2 76 COM3 75 AVSS 74 VREF 73 VCC 72 SEG0 71 SEG1 70 SEG2 69 SEG3 68 SEG4 67 SEG5 66 SEG6 65 SEG7 1 VL2 2 VL1 3 AN7 4 AN6 5 AN5 6 AN4 7 AN3 8 AN2 9 P61 10 P60 11 P57 12 P56 13 P55 14 P54 15 P53 16 P52 17 P51 18 P50 19 P47 20 P46 21 P45 22 P44 23 INT1 24 INT0 63 SEG9 62 SEG10 61 SEG11 60 P34 59 P35 58 P36 57 P37 56 P00 55 P01 54 P02 53 P03 52 P04 51 P05 50 P06 49 P07 48 P10 47 P11 46 P12 45 P...

Page 38: ... LD5 R51 DCUT SW6 SW4 SW9 24 23 22 21 20 C51 R50 R53 R52 SW1 SW7 VR1 1 A B C 2 3 C50 WH B SW8 SW5 KEY AND JOG UNIT LD5 R51 DCUT SW6 SW4 SW9 24 23 22 21 20 C51 R50 R53 R52 SW1 SW7 VR1 1 A B C 2 3 C50 WH B SW8 SW5 CPU UNIT CIRCUIT DIAGRAMS CONT ...

Page 39: ...istor DTA143ES 1 AB Q3 4 VS2SB1238 3 U Transistor 2SB1238 2 AD Q20 21 VSDTA143ES 3 U Transistor DTA143ES 2 AB Q22 VSDTD143ES 3 U Transistor DTD143ES 1 AC Q23 24 VSDTA143ES 3 U Transistor DTA143ES 2 AB Q25 VSDTA143ES 1B U Transistor DTA143ES 1 AB Q26 VSDTA143ES 3 U Transistor DTA143ES 1 AB Q40 VSDTA143ES 3 U Transistor DTA143ES 1 AB Note The parts marked may cause undue microwave exposure The parts...

Page 40: ... JBTN B014URF0 U Open button R 671 B 1 AE 3 3 JBTN K019URF0 U Open button R 671 IN 1 AE 3 3 JBTN W008URF0 U Open button R 671 W 1 AE 3 4 MSPRCA045WRE0 U Open button spring 1 AA 3 5 GMADIA015URR0 U Display window 1 AE 3 6 JBTN B003URF0 U Start button R 671 B 1 AC 3 6 JBTN G001URF0 U Start button R 671 W 1 AC 3 6 JBTN K020URF0 U Start button R 671 IN 1 AC 3 7 JBTN B004URR0 U Auto Def button R 671 B ...

Page 41: ...30P06000 U Screw 3mm x 6mm 6 AA MISCELLANEOUS 6 1 TINS A074URR0 U Operation manual 1 AM 6 1 TINS A112URR0 U Operation manual R 671 W N 1 AM 6 2 CTNT A001URK0 U Turntable 1 AY 6 3 FAMI A081WRM1 U Trivet Rack 1 AR 6 4 QW QZA001URE0 U High voltage wire B 1 AE 6 5 QW QZA191WRE0 U High voltage wire A 1 AF 6 6 FW VZA053URE0 U Stop switch harness 1 AF 6 7 FW VZA049URE1 U Main harness 1 AT 6 8 LBNDKA004WR...

Page 42: ...RTS 7 7 2 1 6 10 7 6 7 11 4 7 4 21 4 16 6 2 F2 7 7 7 6 7 6 1 1 4 18 4 5 T TC1 7 1 7 1 7 8 7 8 7 8 6 8 2 2 2 2 6 6 7 7 7 12 4 2 FM 7 7 6 9 7 7 4 19 4 20 1 3 1 3 4 8 4 14 4 12 SW2 7 8 7 3 7 8 7 8 7 9 GH1 7 8 4 6 7 11 7 7 4 13 4 13 4 3 GH2 7 2 TC2 F1 7 9 7 5 7 4 4 10 4 28 7 6 SW3 SW1 7 6 7 6 7 7 4 1 C 7 7 4 25 4 2 7 4 7 4 TTM 4 4 4 23 4 11 4 15 4 9 4 22 4 24 4 17 1 2 MG 7 7 OL 4 26 ...

Page 43: ...R 671 42 DOOR PARTS CONTROL PANEL PARTS CONTROL PANEL DOOR PARTS 4 27 5 7 5 8 5 8 5 8 5 8 5 3 5 4 5 5 5 1 5 2 5 6 3 9 3 7 3 10 3 4 3 3 3 13 3 11 3 12 3 6 3 2 3 5 3 8 3 14 x 6 3 14 x 6 3 1 3 1E 3 1F 3 1D ...

Page 44: ...SHEET SPADPA531WRE0 PACKING CASE SPAKCA228URR0 R 671 B SPAKCA229URR0 R 671 W SPAKCA230URR0 R 671 IN SPAKCA237URR0 R 671 W N SPAKCA238URR0 R 671 W E SPAKCA239URR0 R 671 B E SPAKCA240URR0 R 671 IN E Not Replaceable Items OUTER WRAP COVER R 671 B SPADFA353WRE0 INTO THE OVEN CAVITY 6 5 6 3 6 6 6 4 Actual wire harness may be different from illustration 6 7 MISCELLANEOUS MISCELLANEOUS PACKING AND ACCESS...

Page 45: ...R 671 44 98 SHARP CORP 7S1 31E Printed in U K ...

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