Sharp R-671(B) Service Manual

Microwave oven with top and bottom grill

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This service manual covers only those items that differ from the S10808R671EHW.

R-671(W)

REF No

PART CODE

3-2

HPNLCW076URR0

3-5

GMADIA040URR0

3-6

JBTN-W033URF0

3-9

JBTN-R029URF0

3-10

JBTN-O020URR0

SERVICE MANUAL

AUTO

COOK

DEF

WATT

/Kg

STOP

min

R-671

In interests of user-safety the oven should be restored to its original

condition and only parts identical to those specified should be used.

TABLE OF CONTENTS

DESCRIPTION

Control Panel

Display Window

Start Button

More /Less Button

Pizza Button

SHARP CORPORATION

SUPPLEMENT

MICROWAVE OVEN WITH

TOP AND BOTTOM GRILL

R- 671 (W) F

MODEL

S10212R671EHW

QTY

CODE

Table of Contents

Summary of Contents for Sharp R-671(B)

Page 1 This service manual covers only those items that differ from the S10808R671EHW. R-671(W) TABLE OF CONTENTS REF No PART CODE DESCRIPTION CODE HPNLCW076URR0 Control Panel GMADIA040URR0 Display Window JBTN-W033URF0 Start Button JBTN-R029URF0 More /Less Button 3-10 JBTN-O020URR0 Pizza Button SHARP CORPORATION...
Page 2: Table Of Contents
WATT STOP R-671(W) R-671(IN)E R-671 R-671(IN) R-671(B)E R-671(W)N In interests of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used. TABLE OF CONTENTS Page CAUTION, MICROWAVE RADIATION ....................2 WARNING ..............................
Page 3: Caution Microwave Radiation
CAUTION MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected. All input and output microwave connections, waveguides, flanges and gaskets must be secured.
Page 4: Warning
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 carefully study the entire text of this manual, so they will be qualified to render satisfactory customer service.
Page 5: Servicing
Sharp beveelt ten sterkste aan dat, voor zover mogelijk, defecten worden opgespoord wanneer de stekker uit het Wanneer alle reparaties zijn uitgevoerd en de oven weer in stopcontact is gehaald.
Page 6 är kallt utför Du 3 steg kontroller och kontrollerar anslutningarna till varje enskild komponent på nytt. Sharp rekommenderar att felsökning sker med strömmen fränkopplad. Ibland kan det var nödvändigt att koppla på När all service är klar och ugnen ihopskruvad skall ugnens strömmen efter det att höljet avlägsnats, utför da 3 Steg...
Page 7 Sharp raccomanda, nei limiti del possibile, che la ricerca dei guasti avvenga in assenza di alimentazione elettrica. In alcuni casi tuttavia, può essere necessario alimentare Dopo aver portato a termine le operazioni di manutenzione l'apparecchio dopo aver rimosso la scatola esterna.
Page 8: Product Specifications
PRODUCT DESCRIPTION SPECIFICATION ITEM DESCRIPTION Power Requirements 230 Volts 50 Hertz Single phase, 3 wire earthed Power Consumption Microwave cooking 1.3 kW Approx. 5.8 A Top Grill mode ..... 0.75 kW Approx. 3.3 A Grill cooking Bottom Grill mode ....0.45 kW Approx.
Page 9: Appearance View
APPEARANCE VIEW OVEN 1. Control panel 2. Oven lamp 3. Grill heating element (Top Grill) 4. Door opening button 9. Door seals and sealing surfaces 10.Ventilation openings 5. Waveguide cover 6. Oven cavity 11.Outer cabinet 7. Turntable motor shaft 12.Power supply cord 8.
Page 10: Operation Sequence
OPERATION SEQUENCE OFF CONDITION Switch Contact Condition During Oven Door Closing the door activates the primary latch switch and the Cooking Open(No cooking) stop switch. COM-NO Closed Opened Primary latch Switch COM-NC Opened Closed IMPORTANT: Stop switch COM-NO Closed Opened When the oven door is closed, the contacts COM-NC COM-NO Closed...
Page 11 OPERATION SEQUENCE CONT 6. The relay RY5 stays closed for five (5) minutes, and the TOP GRILL MODE fan motor operates. In this mode, the food is cooked by the grill heating element (top grill). Select the TOP GRILL mode with the DUAL COOKING CONDITION COOKING MODE selector.
Page 12: Function Of Important Components
OPERATION SEQUENCE CONT PIZZA COOKING Specified cooking Limited power Time base Cooking mode time (minutes) output (%) (seconds) PIZZA automatically works out the correct cooking mode Microwave (100%) and time for cooking. Chose menu with the PIZZA button Top grill and enter the weight of the food with the TIME/WEIGHT Bottom grill dial.
Page 13: Troubleshooting Guide
FUNCTION OF IMPORTANT COMPONENTS CONT SPECIAL FUSE F1 15A TURNTABLE MOTOR TTM If the wire harness or electrical components are short- The turntable motor drives the turntable roller assembly circuited, this fuse F1 blows to prevent an electric shock of to rotate the turntable.
Page 14: Test Procedure
TROUBLESHOOTING GUIDE CONT TEST PROCEDURE A B C D E E E F F G H I J J K K L M N N N N N N O POSSIBLE CAUSE DEFECTIVE PARTS PROBLEM CONDITION Fuse F1 15A blows when power cord is plugged into wall outlet.
Page 15: Test Procedures
TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MAGNETRON TEST NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECKS. Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a reading of less than 1 ohm.
Page 16 TEST PROCEDURES CONT PROCEDURE COMPONENT TEST LETTER Initial temperature ....................T1 = 11°C Temperature after (52 + 3) = 55 sec ..............T2 = 21°C Temperature difference Cold-Warm ..............∆T1 = 10C Measured output power The equation is “P = 80 x ∆T” ............P = 80 x 10°C = 800 Watts ±...
Page 17 TEST PROCEDURES CONT PROCEDURE COMPONENT TEST LETTER 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.
Page 18 TEST PROCEDURES CONT PROCEDURE COMPONENT TEST LETTER If the fuse F8A (F2) is blown by incorrect door switching replace the defective switch(es) and the fuse F8A (F2). CARRY OUT 4R CHECKS. CAUTION: Only replace fuse with the correct value replacement. NOISE FILTER TEST LINE CROSS CAPACITOR 0.22µ/250V...
Page 19 TEST PROCEDURES CONT PROCEDURE COMPONENT TEST LETTER 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 can not be performed with only a voltmeter and ohmmeter.
Page 20 TEST PROCEDURES CONT PROCEDURE COMPONENT TEST LETTER PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD (PWB) IS OPEN To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse.
Page 21: Control Panel Assembly
CONTROL PANEL ASSEMBLY OUTLINE OF CONTROL PANEL The touch control section consists of the following units as 4) ACL Circuit shown in the touch control panel circuit. A circuit to generate a signals which resets the LSI to the initial state when power is supplied. The principal functions of these units and the signals communicated among them are explained below.
Page 22 DESCRIPTION OF LSI CONT Pin No. Signal Description Oven lamp and turntable motor driving signal(Square Waveform : 50Hz). To turn on and off shut-off relay (RY1). 20 msec The square waveform voltage is delivered to the relay (RY1) driving circuit . During cooking Terminal not used.
Page 23 DESCRIPTION OF LSI CONT Pin No. Signal Description RESET Auto clear terminal. Signal is input to reset the LSI to the initial state when power is applied. Temporarily set to "L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H"...
Page 24 SERVICING 1. Precautions for Handling Electronic Components For those models, check and repair all the controls (sensor-related ones included) of the This unit uses CMOS LSI in the integral part of the touch control panel while keeping it connected circuits. When handling these parts, the following pre- cautions should be strictly followed.
Page 25: Component Replacement And Adjustment Procedure
Oven lamp, Magnetron, High voltage transformer To prevent an electric shock, take the following and Oven cavity. manners. 3) Sharp edge: 1. Before wiring, Bottom plate, Oven cavity, Weveguide flange, 1) Disconnect the power supply. Chassis support and other metallic plate.
Page 26 10.Now, the turntable motor is free. Slits Re-install 1. Remove the any sharp edges on the turntable motor cover and the base plate with the cutting pliers. Power angle R-671 - 25...
Page 27: Fan Motor Replacement
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT FAN MOTOR REPLACEMENT REMOVAL Because the hole (for shaft) of it may be- come bigger than a standard one. 1. CARRY OUT 3D CHECKS. 5. Now, the fan motor is free. 2. Disconnect the wire leads from the fan motor. 3.
Page 28 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT POWER SUPPLY CORD REPLACEMENT Removal Re-install 1. CARRY OUT 3D CHECKS. 1. Insert the moulding cord stopper of power supply cord 2. Remove the one (1) screw holding the green/yellow into the square hole of the power angle, referring to the wire to the power angle.
Page 29 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT PRIMARY LATCH SWITCH, STOP SWITCH AND MONITOR SWITCH ADJUSTMENT If the primary latch switch, stop switch and monitor switch results (play of the door) should be less than 0.5mm. do not operate properly due to a mis-adjustment, the 2.
Page 30 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE CONT 5. Catch two (2) pins of door panel on two (2) hole of upper and lower oven hinges. 6. Re-install choke cover to door panel by pushing. Note: After any service to the door; (A) Make sure that door sensing switch and primary latch switch are operating properly.
Page 31: Microwave Measurement
MICROWAVE MEASUREMENT Recommended instruments are: After adjustment of door latch switches, monitor switch NARDA 8100 and door are completed individually or collectively, the NARDA 8200 following leakage test must be performed with a survey HOLADAY HI 1500 instrument and it must be confirmed that the result meets SIMPSON 380M the requirements of the performance standard for micro- 2.
Page 32: Test Data At A Glance
TEST DATA AT A GLANCE PARTS SYMBOL VALUE / DATA Special fuse 15A / 250V Fuse F 8A Thermal cut-out (HVT) 145°C Off / 115˚C On Thermal cut-out (OVEN) 150°C Off / 130˚C On Grill heating element (top) Approx. 76 Ω / Insulation resistance > 10 MΩ Bottom heating element Approx.
Page 33: Wiring Diagram
CIRCUIT DIAGRAMS Note: SCHEMATIC AC CORD CONNECTION NOTE: CONDITION OF OVEN BRN : BROWN 1. DOOR CLOSED. BLU : BLUE 2. PLUGGED IN OVEN. G-Y : GREEN AND YELLOW STRIPE 3. NOTHING APPEARS ON DISPLAY. /15 : SECTIONAL AREA OF 1.5mm MIN.
Page 34 CIRCUIT DIAGRAMS CONT SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. MICROWAVE COOKING MODE SELECTED. 3. POWER LEVEL CHOSEN. 4. COOKING TIME ENTERED. 5. STRAT BUTTON PRESSED. NOISE F2: FUSE F8A FILTER CONTROL UNIT SW2: STOP SWITCH SW3: SW1: PRIMARY LATCH SWITCH MONITOR SWITCH Figure O-2 Oven Schematic-Microwave cooking Condition SCHEMATIC...
Page 35 CIRCUIT DIAGRAMS CONT SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. TOP AND BOTTOM GRILL COOKING MODE SELECTED. Indicates components with potential above 250 V. 3. COOKING TIME ENTERED. 4. STRAT BUTTON PRESSED. NOISE F2: FUSE F8A FILTER CONTROL UNIT SW2: STOP SWITCH SW3:...
Page 36: Pictorial Diagram
CIRCUIT DIAGRAMS CONT R-671 - 35...
Page 37: Control Panel Circuit
CIRCUIT DIAGRAMS CONT R-671 - 36...
Page 38: Printed Wiring Board
CIRCUIT DIAGRAMS CONT DCUT DCUT ( KEY AND JOG UNIT ) ( CPU UNIT ) Figure S-3. Printed Wiring Board R-671 - 37...
Page 39: Parts List
PARTS LIST ∆ Note: The parts marked " " may cause undue microwave exposure. / The parts marked "*" are used in voltage more than 250V. / "§" Mark: Spare parts delivery section. ELECTRIC PARTS REF. NO. PART NO. § DESCRIPTION Q'TY CODE...
Page 40: Control Panel Parts
PARTS LIST CONT CONTROL PANEL PARTS CONT REF. NO. PART NO. § DESCRIPTION Q'TY CODE R1-2 VRS-B13AA511J Resistor 510 ohm R4-5 VRD-B12EF472J Resistor 4.7k ohm 1/4W R6-8 VRD-B12EF103J Resistor 10k ohm 1/4W VRD-B12EF102J Resistor 1.0k ohm 1/4W VRD-B12EF241J Resistor 240 ohm 1/4W VRD-B12EF472J Resistor...
Page 41 PARTS LIST CONT OVEN PARTS CONT REF. NO. PART NO. § DESCRIPTION Q'TY CODE 4-12 LANGQA007URP0 Air duct angle ∆ 4-13 LANGQA008URP0 Grill heater angle 4-14 MLEVFA078WRF0 Open lever 4-15 MSPRCA004URE0 Sealed spring 4-16 PCOVPA309WRE0 Waveguide cover 4-17 PCOVQA002URP0 Heater cover 4-18 PCUSGA360WRP0 HVT cushion...
Page 42: Cabinet And Unit Chassis Parts
CABINET AND UNIT CHASSIS PARTS OVEN PARTS 6-10 7-11 7-11 4-13 4-21 4-13 4-16 4-28 4-10 4-24 4-17 7-12 4-15 4-20 4-11 4-23 4-14 4-19 4-12 4-22 4-26 4-25 4-18 NOTE: In the event of removing the turntable motor cover, this part should be refit- ted using screw connection: LX-CZS030WRE0 (Ref.
Page 43: Control Panel/Door Parts
CONTROL PANEL/DOOR PARTS CONTROL PANEL PARTS 3-1D 3-1E 3-1F 3-13 3-10 3-14 x 6 3-11 3-14 x 6 3-12 DOOR PARTS 4-27 R-671 - 42...
Page 44: Miscellaneous/Packing And Accessories
RACK DOOR PROTECTION SHEET (SPADPA531WRE0) TURNTABLE TRAY ACCESSORY HOLDER BOTTOM PAD ASSEMBLY (SPADPA010URE0) (FPADBA007URK0) INTO THE OVEN CAVITY PACKING CASE (SPAKCA228URR0); R-671(B) (SPAKCA229URR0); R-671(W) (SPAKCA230URR0); R-671(IN) Not Replaceable Items. (SPAKCA237URR0); R-671(W)N (SPAKCA238URR0); R-671(W)E (SPAKCA239URR0); R-671(B)E (SPAKCA240URR0); R-671(IN)E R-671 - 43...
Page 45 ® '98 SHARP CORP. (7S1.31E) Printed in U.K. R-671 - 44...

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R-671(in)R-671(w)R-671(w)e R-671(in)e R-671(b)e R-671(w)n

Sharp R-671(B) Service Manual

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