Gebruiksaanwijzing /service van het product r-8580 van de fabrikant Sharp
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SHARP SERVICE MANUAL S9706R8580J// CONVECTION MICROWAVE OVEN TAME OF CONTENTS PRECAUTIONS Page .......................................................................................................... FOREWORD INSIDE FRONT COVER .....................
R -8680 SERVICE MANUAL SHARP CONVECTION MICROWAVE OVEN R-8580 FOREWORD This Manual has been prepared to provide Sharp Corp. Service Personnel with complete Operation and Service Information for the SHARP CONVECTION MICROWAVE oven, R-8580.
R-8580 PRODUCT DESCRIPTION ITEM Power Requirements Power Consumption Power Output Convection Heater Power Output Case Dimensions Cooking Cavity Dimensions Control Complement Set Weight SPECIFICATION D.
R-8580 Auto-TouchTM Control Panel Touch to select sensor cook mode ,&&:::C::P: Touch to select Compu Cook mode 1 - Fresh vegetables 2 - Frozen vegetables 3 - Baked potatoes 4 - Frozen dinners .
OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. (RD71101 U) OFF CONDITION Closing the door activates both door interlock switches: upper latch switch, lower latch switch and stop switch.
R -8580 CONVECTION COOKING CONDITION PREHEATING CONDITION Program desired convection temperature by touching the CONVECTION pad and the temp. pad. When the START pad is touched, the following oper- ations occur: 1.
R-8580 Note: During alternate Microwave/Convection opera- tion, the convection heater is energized only if the cavity temperature drops below the set tem- perature. SENSOR COOKING CONDITION Using the SENSOR COOK function, the foods are cooked without figuring time, power level or quantity.
240V-50Hz G-4 MBA I TEMP. FUSE 142’C UPPER LATCH SWITCH NC TEMP. FUSE 142’C UPPER LATCH SWITCH ? NC LOWER I ATI -. -. . SWITCH d ^-^^ w. +A-7 l-6 RW A-5 A RV6 1 c I - CONVECTION%EATER POWER TRANSFORMER I t MONITOR RESISTOR O.B/2OW MON,TOR SW,TCH OVEN LAMP FAN MOTOR n MONITOR RESISTOR D.
R-8580 240V-50Hz AC CORD CONNECTION BRN : BROWN BLU : BLUE G-Y : GREEN AND YELLOW STRIPE 117 : SECTIONAL AREA OF l.Omm’ MIN. SCHEMATIC I NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CONVECTION PAD TOUCHED 3. DESIRED TEMP. PAD TOUCHED 4. START PAD TOUCHED LOWER LATCH SWITCH MONITOR RESISTOR 0.
R -8580 DESCRIPTION AND FUNCTION OF COMPONENTS THERMISTOR The thermistor is a negative temperature coefficient type. The temperature in the oven cavity is detected through the resistance of the thermistor, and then the CPU unit causes the heater relay to operate, thus the current to the convection heater is turned ON/OFF.
R-8580 The convection heater is located at the left side of the oven cavity. It is intended to heat air driven by the convection fan. The heated air is kept in the oven and force-circulated and reheated by the convection heater.
SERVICING TROUBLESHOOTING GUIDE When troubleshooting the microwave oven, it is helpfull to follow the Sequence of Operation in per- IMPORTANT: lf the oven becomes inoperative be- cause of a blown fuse in the monitor forming the checks. Many of the possible causes of trouble will require that a specific test be performed.
R -8580 PROBLEM POSSIBLE CAUSE TEST PROCEDURE OR CORRECTION COOKING CONDITION Oven lamp does not light in cook Defective shut-off relay (RY2) on relay Procedure N. cycle. unit. (Does light when door is opened) Defective CPU unit. Procedure 0. Oven lamp does not light at all.
R -8580 PROBLEM POSSIBLE CAUSE TEST PROCEDURE OR CORRECTION CONVECTION r CONV indicator light but oven does not go into a cook cycle when START pad is touched. CONV indicator lights, but heating element does not heat. Temperature in the oven cavity is lower or higher than preset.
R-8580 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST MAGNETRON ASSEMBLY TEST DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPO- NENTS OR WIRING. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm.
R-8680 TEST PROCEDURES (CONT’D) PROCEDURE LETTER COMPONENT TEST 3. Water container should be one (1) litre beaker made of Pyrex glass and its diameter approxi- mately 12 cm. 4. Room temperature should be around 20 “C. 5. Power supply voltage should be specification voltage.
R-8580 TEST PROCEDURES (CONT’D) PROCEDURE LETTER COMPONENT TEST MONITOR SWITCH TEST Before performing this test, disconnect oven from power supply and make sure that the upper latch switch is operating properly referring to the above Switch Test Procedure.
R -8580 TEST PROCEDURES (CONT’D) PROCEDURE LETTER COMPONENT TEST CONVECTION HEATER TEST Make sure the convection heater is fully cooled and test as follows; a. Disconnect wire leads and measure the resistance with an ohmmeter. On the R x 1 scale, the resistance between the convection heater terminals should be approximately 38 ohms.
R-8580 TEST PROCEDURES (CONT’O) PROCEDURE LETTER COMPONENT TEST N RELAY UNIT TEST The relay unit consists of circuits including the shut-off relays, buzzer, transformer, etc. Plug power cord into wall receptacle “88:88” will be flashing in the display.
TEST PROCEDURES (CONT’O) PROCEDURE LETTER COMPONENT TEST 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 voltmeter and ohmmeter.
TEST PROCEDURES (CONT’O) PROCEDURE LETTER COMPONENT TEST 0 AH SENSOR TEST Checking the initial sensor cooking condition (1) The oven should be plugged in at least five minutes befor sensor cooking. (2) Room temperature should not exceed 35 “C. (3) The unit should not be installed in any area where heart and steam are generated.
R-8580 TEST PROCEDURES (CONT’D) PROCEDURE LETTER COMPONENT TEST CHECKING CONTROL UNIT (1) Disconnect oven from power supply and remove outer case. (2) Discharge the high voltage capacitor. (3) Disconnect the wire leads from the cook relay. (4) Disconnect the sensor connector that is mounted to lower position of control panel.
R-8580 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as shown in the touch control panel circuit. (1) Relay Unit (2) Key Unit (3) Control Unit The principal functions of these units and the signals communicated among them are explained below.
DESCRIPTION OF LSJ LSI( IZA096DR) The I/O signal of the LSI(IZA096DR) is detailed in the following table. (RD93101 U) PIN NO. I l-6 1 SIGNAL ) EO-E5 I I/O / OUT Digit selection signal. Refer to the touch control panel circuit about the relation between signals and digits.
R-8580 PIN NO. 15 1 SIGNAL / El4 I I/O j OUT Segment data signal. Signal similar to E6. PIN NO. / 16 1 SIGNAL j El5 I I/O 1 OUT Seqment data siqnal. Signal similar to E6. Kev strobe siqnal. Signal applied to touch-key section. A pulse signal is input to AN4-AN7 terminal while one of G-6 line keys on key matrix is touched.
R -8580 PIN NO. 1 29 1 SIGNAL j SI E25 I I/O / OUT Used for initial balancing of the bridge circuit(absolute himidity sensor). (RD936Al U) PIN NO. / 30 1 SIGNAL / E26 I I/O / OUT Signal to sound buzzer. A: Key touch sound.(O.l sec.) B: Completion sound.
R -8580 PIN .NO. / 38 1 SIGNAL / R5 Damper motor relav driving signal. To turn on and off the damper motor relay. I I/O j OUT (RD93466UI PIN NO. 1 39 1 SIGNAL / R6 I l/O 1 OUT Digit selection signal. Signal similar to EO. PIN NO. j 40 1 SIGNAL 1 R7 I I/O / IN Input signal which communicates the damper open/close information to LSI.
PIN NO. / 51 1 SIGNAL / AN3 I I/O / IN 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 (RD936A3U) PIN NO. ( 52 SIGNAL / AN2 I I/O IN AH sensor inuut.
R-8580 ABSOLUTE HUMIDITY SENSOR CIRCUIT (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration. One thermister is housed in the closed vessel filled with dry air while another in the open vessel.
R -8580 SERVICING 1. Precautions for Handing Electronic Components This unit uses PMOS LSl in the integral part of the circuits. When handing these parts, the following precautions should be strictly followed. PMOS LSI have extremely high impedance at its input and output terminals.
R -8580 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING: To avoid possible exposure to microwave 4. There is any defective parts in the interlock, A. B. 1. 2. 3. 4. 5. energy; Before operating the oven oven door or microwave generating and trans- mission assemblv.
1. 2. 3. 4. 5. 5. 6. 8. 9. MAGNETRON REMOVAL Disconnect oven from power supply and remove outer case. screws, a carefull attention should be necessary to Discharge the high voltage capacitor. prevent the magnetron fall away. Disconnect wire leads from the magnetron.
R -8580 DAMPER ASSEMBlY REMOVAL 1. Disconnect oven from power supply and remove 7. Raise the stopper of the damper shaft, and pull out outer case. the damper shaft. 2. Discharge the high voltage capacitor. 3. Disconnect wire leads from damper motor and damper switch.
CONTROL PANEL ASSEMBLY AND CPU UNIT REMOVAL The complete control panel should be removed for re- placement of components except the relay unit. To remove the control panel, proceed as follows: 1, Disconnect oven from power supply and remove outer case.
R -8580 DOOR REPLACEMENT AND ADJUSTMENT DOOR REPLACEMENT 1. Disconnect oven from power supply and remove outer case. 2. Holding the door, remove three (3) screws securing the upper door hinge to the oven cavity. The door assembly is nowfree from the oven cavity.
R -8580 MICROWAVE MEASUREMENT After adjustment of door latch switches, monitor switch and door are completed individually or collec- tively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for microwave oven.
R -8580 1 2 3 4 5 6 c I I II I I I 11 II II II II OIL> II- I 1 I I I l---lIIIII I II r t E it- P .- P 5 8 E 2 a . z B g ii F 1 I 2 3 4 I 5 6 36.
R -8580 A 6 C D E F G H 1 2 3 4 5 6. 1 I 2 I 3 4 5 6 1 A IB / / lC D 37.
R -8580 1 2 3 4 5 6 1 5 2 t (dir SW -* 0 L. T.TM F M. CONV M OAMPM P0Wef.q I I I I Relay Unit Control Unit Figure S-3. Printed Wiring Board I I I I I 38.
PARTS LIST Note : The voltage supplied to the parts ‘I*” are greater than 250V. * Refer to “REPLACEMENT PARTS LIST” described at after PARTS LIST.
R -8580 Note : The voltage supplied to the parts RI,, are greater than 25OV. * Refer to “REPLACEMENT PARTS LIST” described at after PARTS LIST. REF.
R-8580 Note : The *I REF. NO. VRSl 3- 3 3- 4 3- 5 3- 6 3- 7 3- 8 3- 9 3-10 oltage supplied to the parts ,,*” are greater than 250V. ?fer to “REPLACEMENT PARTS LIST” described at after PARTS LIST.
R -8580 Note The voltage supplied to the parts n*w are greater than 250V. * Refer to “REPLACEMENT PARTS LIST” described at after PARTS LIST. * * REF.
R -8580 Note : The voltage supplied to the parts “*,, are greater than 250V. * Refer to “REPLACEMENT PARTS LIST” described at after PARTS LIST. REF. NO. PART NO. DESCRIPTION CI’TY CODI steamduct ass'y, heating element unit 7-14 XCPSD40P08000 Screw; and heating element mtg.
R -8580 REPLACEMENT PARTS LIST This replacement parts list shows interchangeability of marked ( * ) parts on the control panel parts to the alterations of product locations. This list has been prepared to show LISTED PART NO. along with the USED PART NO.
R-8580 - A BI C -1 D E F 1 2 3 4 I ! 5 6 - x 9 a 1 2 3 4 , , , I 5 6 45.
R-8580 1 2 3 4 5 6 CONTROL PANEL PARTS 3-r 9 ‘Y ‘ k4 I” 4 J/I /’ / 3-2 0 I 0 1, * ri p II 0 i I 8 P 1 DOOR ASSEMBLY MISCELLANEOUS 6- I P 6-3 Trans.
R-8580 1 2 3 4 5 6 I , PACKING AND ACCESSORIES I [TRAY PACKING FOAM a (SPADP0328WREO) WI Not Redaceble Item L / 1 2 I 3 4 5 6 47.
R -8580 48.
R -8580 49.
R -8580 (RDXI 101 U) SHARP ‘87 0 SHARP CORP. (9U0.75E) Printed in Australia.
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