Sharp R-967 Service Manual

Microwave oven grill and convection

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This service manual covers only those items that differ from the R-963(IN/W)

For further information on items not covered by this supplement refer to the Service Manual

for R-963(IN/W) .

REF No

PART CODE

RHET-A269WRZZ

RMOTEA415WRZZ

3-2

DPWBFA192URK0

3-5

FUNTKC138URE0

3-5

FUNTKC139URE0

4-4

DOVN-A024URK0

4-20

PPIPFA005UR10

4-21

PSKR-A013URP0

4-22

PSKR-A014URP0

4-23

PSKR-A015URP0

4-24

PSKR-A016URP0

4-28

PSKR-A012URP0

4-30

NFANMA004URP0

4-32

PDUC-A019URP0

5-1

CDORFS028URK0

5-1

CDORFW026URK0

5-1-4

JHNDPS201URT0

5-1-4

JHNDPW200URF0

5-1-7

PGLSPA031URR0

5-1-9

XCTSD40P20000

5-1-10

JHNDPK205URF0

5-1-10

JHNDPW205URF0

6-6

TINS-A317URR0

6-7

TCADCA015URR0

6-12

TINS-A319URR0

SERVICE MANUAL

GRILL AND CONVECTION

R- 967 (W/IN)

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

Convection heating element

Convection motor

CPU/LCD assy

Key sheet(R-967(W))

Key sheet(R-967(IN))

Cavity assy

Pipe

Air separate angle A

Air separate angle B

Air separate angle C

Air separate angle D

Air separate angle E

Convection fan

Convection duct

Door assy (R-967(IN))

Door assy (R-967(W))

Door handle (R-967(IN))

Door handle (R-967(W))

Front door glass (R-967(W))

Screw

Handle cover (R967(IN))

Handle cover (R-967(W))

Operation manual

Cook book

Quick start guide

SHARP CORPORATION

R-967 - 1

SUPPLEMENT

MICROWAVE OVEN

S30332R967EHW

S07284R963EHW

QTY

CODE

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Summary of Contents for Sharp R-967

Page 1 CDORFS028URK0 Door assy (R-967(IN)) CDORFW026URK0 Door assy (R-967(W)) 5-1-4 JHNDPS201URT0 Door handle (R-967(IN)) 5-1-4 JHNDPW200URF0 Door handle (R-967(W)) 5-1-7 PGLSPA031URR0 Front door glass (R-967(W)) 5-1-9 XCTSD40P20000 Screw 5-1-10 JHNDPK205URF0 Handle cover (R967(IN)) 5-1-10 JHNDPW205URF0 Handle cover (R-967(W)) TINS-A317URR0 Operation manual...
Page 2 KEY SHEET DOOR PARTS 5-1-8 5-1-1 5-1-2 5-1-3 5-1-8 5-1-5 5-1-7 5-1-6 5-1-9 5-1-10 5-1-4 R-967- 2...
Page 3 SW11 D-CUT SW10 SW12 SW13 Figure S-7 Printed Wiring Of Board of Switch Unit R-967 - 3...
Page 4 4-28 7-16 7-16 4-45 7-16 4-37 4-38 7-11 7-16 7-10 7-14 7-15 4-34 7-10 7-13 4-12 4-41 7-15 4-40 7-17 4-36 4-43 7-16 4-31 7-10 7-15 7-16 7-16 4-42 7-15 4-35 7-10 7-16 4-32 4-44 7-16 4-33 7-16 R-967- 4...
Page 5: Table Of Contents
TEST DATA AT A GLANCE ........................34 WIRING DIAGRAM ..........................35 PICTORIAL DIAGRAM .......................... 39 POWER UNIT CIRCUIT ......................... 40 CPU UNIT CIRCUIT ..........................41 INDICATOR CIRCUIT ..........................42 KEY UNIT CIRCUIT ..........................43 PRINTED WIRING BOARD ........................44 PARTS LIST ............................45 SHARP CORPORATION...
Page 6 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 7: Warning
GRILL AND CONVECTION MICROWAVE OVEN R-963(IN)/ R-963(W) GENERAL INFORMATION GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. APPEARANCE VIEW 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 8: 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 9 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 10 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 11: Product Specifications
PRODUCT DESCRIPTION SPECIFICATION ITEM DESCRIPTION Power Requirements 230 Volts / 50 Hertz / Single phase, 3 wire earthed Power Consumption Microwave cooking 1.5 kW Approx. 6.7 A Convection cooking 2.65 kW Approx. 11.5 A Grill cooking 2.65 kW Approx. 11.5 A Micro and Grill ......
Page 12: Appearance View
APPEARANCE VIEW OVEN 1. Grill heating element 2. Oven lamp 3. Control panel 4. Shelf runners 5. Waveguide cover 6. Oven cavity 7. Coupling 8. Door seals and sealing surfaces 9. Door opening handle 10.Air-vent openings 11.Outer cabinet 12.Power cord 15.Low Rack 13.Turntable 16.High Rack...
Page 13: Operation Sequence
OPERATION SEQUENCE OFF CONDITION Switch Contact Condition During Oven Door Closing the door activates the monitored latch switch and Cooking Open(No cooking) the stop switch. COM-NO Closed Opened Monitored latch switch IMPORTANT: COM-NC Opened Closed When the oven door is closed, the contacts COM-NC Stop switch COM-NO Closed...
Page 14 OPERATION SEQUENCE GRILL COOKING CONDITION 1min / START key is touched, the following operations occur: TOP GRILL (Figure O-3a) 1. The relays RY1, RY6 and RY7 are energized, the oven In this condition the food is cooked by the grill heating lamp, turntable motor, fan motor and convection motor element .
Page 15 OPERATION SEQUENCE from the food, it relays the information to its microproces- sor Cook, POTATO, and INSTANT ACTION are auto- sor which will calculate the remaining cooking time and matic cooking functions. power level needed for best results. When the food is cooked, water vapour is developed. POWER OUTPUT REDUCTION The sensor “senses”...
Page 16: Function Of Important Components
FUNCTION OF IMPORTANT COMPONENTS DOOR OPEN MECHANISM If the wire harness or electrical components are short- circuited, this fuse F1 20A blows to prevent an electric The door can be opened by pulling the door handle. shock of fire hazard. Door FUSE F2 F8A 250V 1.
Page 17 FUNCTION OF IMPORTANT COMPONENTS the asymmetric rectifier is 1.7 KV. D1 and D2 of the with the food being cooked. When the temperature inside asymmetric rectifier or high voltage rectifier are shorted the oven cavity reaches the selected temperature, the when the each peak reverse voltage goes beyond the heating elements are de-energized.
Page 18: Troubleshooting Guide
FUNCTION OF IMPORTANT COMPONENTS OPEN JUDGE BY THERMISTOR the damper cam, damper switch SW4 is closed (ON position). 1. If the temperature of the thermistor does not rise to more 1-4. The signal of damper switch SW4 is re-sensed in the than 40˚C after 4 minutes and 15 seconds from when control unit and shut-off relay (RY8) is turned off.
Page 19 TROUBLESHOOTING GUIDE BLOCKED COOLING FAN BLOCKED CONVECTION FAN NO POWER AT WALL OUTLET HOME FUSE OR BREAKER MIS-ADJUSTMENT OF SWITCHES BLOCKED VENTILATION OPENINGS OPENED WIRE HARNESS SHORTED WIRE HARNESS OVEN LAMP OR SOCKET POWER SUPPLY CORD AH SENSOR FOIL PATTERN ON P.W.B. RELAY RY8 RELAY RY7 RELAY RY6...
Page 20: Test Procedure
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 21 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER Room temperature ....... To = 21˚C Initial temperature ..... T1 = 11°C Temperature after (47 + 3) = 50 sec..............T2 = 21°C Temperature difference Cold-Warm..............∆T1 = 10°C Measured output power The equation is “P = 90 x ∆T” ............P = 90 x 10°C = 900 Watts ±...
Page 22 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER THE MEASURING INSTRUMENT MUST HAVE A VOLTAGE AT LEAST 6 VOLTS, BE- CAUSE OTHERWISE AN INFINITE RESISTANCE MIGHT BE SHOWN IN BOTH DIREC- TIONS. HIGH VOLTAGE CAPACITOR TEST CARRY OUT 3D CHECKS. A. Isolate the high voltage capacitor from the circuit. B.
Page 23 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER An open circuit thermal cut-out (MG) TC1 indicates that the magnetron has overheated, this may be due to resistricted ventilation, cooling fan failure. An open circuit thermal cut-out (GRILL) TC2 indicates that the oven cavity has overheated, this may be due to no load operation..
Page 24 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 3. If the fuse F2 F8A is blown, there could be shorts in the asymmetric rectifier or there is a ground in wire harness. A short in the asymmetric rectifier may be occurred due to short or ground in H.V. rectifier, magnetron, high voltage transformer or H.V.
Page 25 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER KEY AND JOG UNIT TEST If the display fails to clear when the STOP pad is depressed, first verify the flat ribbon cable is marking good contact, verify that the door sensing switch (stop switch) operates properly; that is the contacts are closed when the door is closed and open when the door is open.
Page 26 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER STEPS OCCURRENCE CAUSE OR CORRECTION The rated AC voltage is not present between Check supply voltage and oven power cord. Pin Nos. 1 and 3 of the 4-pin connector (E). The rated AC voltage is present at primary Low voltage transformer or secondary circuit defective.
Page 27 TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (1) Disconnect oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Remove the AH sensor. (4) Install the new AH sensor. (5) Re-install the outer case. (6) Reconnect the oven to the power supply and check the sensor cook operation proceed as follows: 6-1.
Page 28: Touch Control Panel Assembly
TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as 8) Back Light Circuit shown in the touch control panel circuit. A circuit to drive the back light (Light emitting diodes LD10 - LD19).
Page 29 DESCRIPTION OF LSI LSI(IXA036DR) The I/O signal of the LSI(IXA036DR) are detailed in the following table. Pin No. Signal Description Used for initial balancing of the bridge circuit (absolute humidity sensor). This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI.
Page 30 DESCRIPTION OF LSI Pin No. Signal Description CNVSS Connected to VC. 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 31 DESCRIPTION OF LSI Pin No. Signal Description Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal while one of G8 line key on matrix is touched. Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P70 - P73 terminal while one of G7 line key on matrix is touched.
Page 32 ABSOLUTE HUMIDITY SENSOR CIRCUIT son rate reaches the preset value (fixed for each menu (1) Structure of Absolute Humidity Sensor to be cooked), the LSI causes the unit to stop sensor The absolute humidity sensor includes two thermistors cooking; thereafter, the unit goes in the next operation as shown in the illustration.
Page 33 SERVICING 1. Precautions for Handling Electronic Components case is installed. This unit uses CMOS LSI in the integral part of the circuits. 6) Run the oven and check all functions. When handling these parts, the following precautions On some models, the power supply cord between the should be strictly followed.
Page 34: Component Replacement And Adjustment Procedure
Oven lamp, Magnetron, High voltage trans- To prevent an electric shock, take the following former and Oven cavity. these procedures. 3) Sharp edge: 1. Before wiring, Bottom plate, Oven cavity, Weveguide flange, 1) Disconnect the power supply. Chassis support and other metallic plate.
Page 35 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 5. Release the capacitor holder from the base plate. CAUTION: WHEN REPLACING HIGH VOLTAGE 6. Remove the high voltage capacitor from the capacitor RECTIFIER ASSEMBLY, ENSURE THAT holder. THE CATHODE (EARTH) CONNECTION 7. Disconnect the high voltage rectifier assembly from the IS SECURELY FIXED TO THE BASE high voltage capacitor.
Page 36 Re-install 4. Cut the three (3) bridges holding the turntable motor 1. Remove the any sharp edges on the turntable motor cover to the base plate with cutting pliers as shown in cover and the base plate with the cutting pliers.
Page 37 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 15.Now, the convection unit assembly is free. CONVECTION MOTOR REMOVAL 15. Remove the one (1) nut and washer from the convec- CONVECTION HEATING ELEMENT REMOVAL tion motor shaft. 15. Remove the two (2) screws holding the convection 16.
Page 38 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE GRILL HEATING ELEMENTS REMOVAL 1. CARRY OUT 3D CHECKS. the oven cavity top plate, slide the grill reflector toward 2. Disconnect wire leads from the thermal cut-out (GRILL). the magnetron. And then lift up the grill reflector and remove it.
Page 39 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE DOOR REPLACEMENT REMOVAL 5. Hold the door panel to the door frame with eight (8) screws. 1. Disconnect the oven from the power supply. 6. Re-install choke cover to door panel by clipping into 2. Push the door slightly. position.
Page 40: Microwave Measurement
MICROWAVE MEASUREMENT Recommended instruments are: After adjustment of door latch switches, monitor switch and door are completed individually or collectively, the NARDA 8100 following leakage test must be performed with a survey NARDA 8200 instrument and it must be confirmed that the result meets HOLADAY HI 1500 the requirements of the performance standard for micro- SIMPSON 380M...
Page 41: Wiring Diagram
SCHEMATICS 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 42 SCHEMATICS Note: SCHEMATIC AC CORD CONNECTION NOTE: CONDITION OF OVEN BRN : BROWN 1. DOOR CLOSED. BLU : BLUE 3. " . O" APPEARS ON DISPLAY. G-Y : GREEN AND YELLOW STRIPE /15 : SECTIONAL AREA OF 1.5mm MIN. " "...
Page 43 SCHEMATICS SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. COOKING TIME ENTERED. NOTE: The convection cooking will be curried out as back up until the 3. GRILL MODE SELECTED. oven cavity temperature rises to 220 ˚C 3. STRAT KEY TOUCHED. CONTROL UNIT SW4:...
Page 44 SCHEMATICS Note: SCHEMATIC NOTE: CONDITION OF OVEN AC CORD CONNECTION 1. DOOR CLOSED. BRN : BROWN 2. COOKING TIME ENTERED. BLU : BLUE 3. DUAL MODE PAD TOUCHED ONCE. G-Y : GREEN AND YELLOW STRIPE 4. CONVECTION TEMPERATURE SELECTED. /15 : SECTIONAL AREA OF 1.5mm MIN.
Page 45: Pictorial Diagram
PICTORIAL...
Page 46: Power Unit Circuit
POWER SWITCH UNIT OVEN S1NB10 WH1-4 THERMISTOR WH1-3 – – R4 510 1w WH1-6 Q1 2SB1238 R5 3.3k WH1-9 BUZZER AC230V R3 680 1w 50Hz WH2-2 WH1-10 WH1-5 POWER WH1-11 CONTROL FAN MOTOR WH1-8 CONVECTION WH1-7 MOTOR DAMPER WH2-4 MOTOR R6 130 1w OVEN LAMP WH2-3...
Page 47: Cpu Unit Circuit
CONTROL PANEL UNIT CIRCUIT...
Page 48: Indicator Circuit
INDICATOR CIRCUIT Figure S-4. Indicator Circuit...
Page 49: Key Unit Circuit
KEY UNIT CIRCUIT Figure S-5. Key Unit Circuit...
Page 50: Printed Wiring Board
PRINTED WIRING BOARD OF POWER UNIT VRS1 POWER CONT Figure S-6. Printed Wiring Board of Power Unit...
Page 51: 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 REF. NO. PART NO. § DESCRIPTION Q'TY CODE ELECTRIC PARTS RC-QZA219WRE0 High voltage capacitor...
Page 52 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 REF. NO. PART NO. § DESCRIPTION Q'TY CODE 3- 7 HDECQS001URT0 Panel sash [R-963(W)]...
Page 53 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 REF. NO. PART NO. § DESCRIPTION Q'TY CODE 6- 5 FAMI-A002URK0 Low rack...
Page 54 EXPLODED DIAGRAM OF OVEN PARTS OVEN PARTS 7-16 4-17 7-10 4-25 6-11 7-13 4-18 4-20 7-17 7-13 4-27 7-16 4-10 4-22 7-16 4-39 4-21 4-19 4-13 7-13 7-13 4-23 4-15 7-17 7-12 7-16 4-16 7-10 7-18 4-24 4-14 4-11 7-16 7-14 4-26 7-12...
Page 55 CONTROL PANEL/DOOR PARTS CONTROL PANEL PARTS DOOR PARTS 5-1-8 5-1-1 7-15 5-1-3 5-1-2 5-1-8 5-1-5 5-1-7 5-1-4 5-1-6...
Page 56 (PSRA-A001URH0) SQUARE RACK (FAMI-A003URK0) ROLLER STAY ASSEMBLY BAG PLASTIC PRINTED MATTER (SSAKBA003URE0) ACCESSORY HOLDER BOTTOM PAD ASSEMBLY INTO THE (SPADPA019URE0) OVEN CAVITY (FPADBA304WRK3) PACKING CASE 7-15 R-963(W); SPAKCA381URR0 R-963(IN); SPAKCA382URR0 Not Replaceable Items. 2000 SHARP CORP. (8S1.31E) Printed in U.K.

Sharp R-967 Service Manual

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