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Sharp R-930AW manual

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  • Page 1

    R-930AK R-930AW In the interest 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 CONVECTION MICR O W A VE O VEN Page PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICE TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY ................... INSID[...]

  • Page 2

    R-930AK R-930AW PRECA UTIONS T O BE OBSER VED BEFORE AND DURING SER VICING T O A V OID POSSIBLE EXPOSURE T O EXCESSIVE MICR O W A VE ENERGY (a) Do not operate or allow the oven to be operated with the door open. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repai[...]

  • Page 3

    1 R-930AK R-930AW BEFORE SER VICING Before servicing an operative unit, perform a microwave emission check as per the Microwave Measurement Procedure outlined in this service manual. If microwave emissions level is in excess of the specified limit, contact SHARP ELECTRONICS CORPORATION immediately 1- (800) 237-4277. If the unit operates with the do[...]

  • Page 4

    2 R-930AK R-930AW MICR O W A VE MEASUREMENT PR OCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm 2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (throug[...]

  • Page 5

    3 R-930AK R-930AW SER VICE MANU AL CONVECTION MICROWAVE OVEN R-930AK / R-930AW FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Informa- tion for the SHARP CONVECTION MICROWAVE OVENS R- 930AK / R-930AW. It is recommended that service personnel carefully study the entire text of t[...]

  • Page 6

    4 R-930AK R-930AW SPECIFICA TION ITEM DESCRIPTION Power Requirements 120 Volts 13.0 Amperes (Microwave) / 13.0 Amperes (Convection) 60 Hertz / Single phase, 3 wire grounded Power Output 900 watts (IEC 705 Test Procedure) Operating frequency of 2450MHz Convection Power Output 1450 Watts Case Dimensions Width 24-5/8" Height 14-7/8" Depth 19[...]

  • Page 7

    5 R-930AK R-930AW Electrical Requirements The electrical requirements are a 115 -120 volt 60 Hz, AC only, 15 or 20 amp. fused electrical supply. It is recommended that a separate circuit serving only this appliance be provided. When installing this appliance, observe all applicable codes and ordinances. A short power-supply cord is provided to redu[...]

  • Page 8

    6 R-930AK R-930AW OPERA TION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. OFF CONDITION Closing the door activates the door sensing switch and secondary interlock switch. (In this condition, the monitor switch contacts are opened.) When oven is plugged in, 120 volts A.C. is supplied [...]

  • Page 9

    7 R-930AK R-930AW CONVECTION COOKING CONDITION PREHEATING CONDITION Program desired convection temperature by touching the CONVECTION pad and the Temperature pad. When the START pad is touched, the following operations occur: 1. The coil of shut-off relays (RY1, RY3,RY5 and RY6) are energized, the oven lamp, cooling fan motor, turntable motor and c[...]

  • Page 10

    8 R-930AK R-930AW The sensor “senses” the vapor and its resistance increases gradually. When the resistance reaches the value set ac- cording to the menu, supplementary cooking is started. The time of supplementary cooking is determined by experi- ment with each food category and inputted into the LSI. An example of how sensor works: 1. Potatoe[...]

  • Page 11

    9 R-930AK R-930AW Figure O-2. Oven Schematic-Microwave Cooking Condition IMPORTANT: During sensor cooking operation, the fire sensing op- eration sequence will not begin until the AH sensor has SCHEMATIC 1. DOOR CLOSED. 2. COOKING TIME PROGRAMMED. 3. “START” PAD TOUCHED. Figure O-1. Oven Schematic-OFF Condition SCHEMATIC NOTE: CONDITION OF OVEN[...]

  • Page 12

    10 R-930AK R-930AW SCHEMATIC 1. DOOR CLOSED. 2. CONVECTION PAD TOUCHED. 3. DESIRED TEMP. TOUCHED. 4. COOKING TIME PROGRAMMED. 5. “START” PAD TOUCHED. SCHEMATIC 1. DOOR CLOSED. 2. MIX COOKING PAD TOUCHED. 3. COOKING TIME PROGRAMMED. 4. “START” PAD TOUCHED. 5. RY2 AND RY3 WILL ALTERNATELY CLOSE. DURING COOK CYCLE. Figure O-4. Oven Schematic-C[...]

  • Page 13

    11 R-930AK R-930AW OUTER CASE SWITCHES The two outer case switches are mounted near the power supply cord at the oven cavity rear plate. When the outer case cabinet is installed with the screws, one of the screws pushes the actuator and then the actuator pushes each plungers of the two outer case switches and their contacts are closed. When a cabin[...]

  • Page 14

    12 R-930AK R-930AW TROUBLESHOO TING GUIDE When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks. Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure letter which will be found in the “Test Procedure”section. IMPORTA[...]

  • Page 15

    13 R-930AK R-930AW A MAGNETRON B POWER TRANSFORMER C H.V. RECTIFIER ASSEMBLY D HIGH VOLTAGE CAPACITOR E SECONDARY INTERLOCK SWITCH F PRIMARY INTERLOCK SYSTEM G MONITOR SWITCH H MONITOR FUSE I MAGNETRON TEMPERATURE FUSE J CONV. THERMAL CUT-OUT K CONVECTION HEATER L THERMISTOR M DAMPER MOTOR N DAMPER SWITCH P OUTER CASE SWITCH Q TOUCH CONTROL PANEL R[...]

  • Page 16

    14 R-930AK R-930AW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST HIGH VOLTAGES ARE PRESENT DURING THE COOK CYCLE, SO EXTREME CAUTION SHOULD BE OBSERVED. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across th[...]

  • Page 17

    15 R-930AK R-930AW If the capacitor is open, no high voltage will be available to the magnetron. Disconnect input leads and check for short or open between the terminals using an ohmmeter. Checking with a high ohm scale, if the high voltage capacitor is normal, the meter will indicate continuity for a short time and should indicate approximately 10[...]

  • Page 18

    16 R-930AK R-930AW J THERMAL CUT-OUT TEST A continuity check across the thermal cut-out terminals should indicate a closed circuit unless the temperature of thermal cut-out reaches 302˚F(150˚C). The thermal cut-out resets automatically at approximately 266˚F(130˚C). If the thermal cut-out has opened under the normal condition, replace the same [...]

  • Page 19

    17 R-930AK R-930AW If the display fails to clear when the STOP/CLEAR pad is depressed, first verify the flat ribbon cable is making 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. If the door sensing switch (stop switch) is goo[...]

  • Page 20

    18 R-930AK R-930AW T COMPU DEFROST TEST (1) Place one cup of water in the center of the turntable tray in the oven cavity. (2) Close the door, touch the "COMPU DEFROST" pad twice and touch the Number pad "5". And then touch the "START" pad. (3) After 2 sec. Now the oven is in COMPU DEFROST cooking condition. (4) The ov[...]

  • Page 21

    19 R-930AK R-930AW V AH SENSOR TEST Checking the initial sensor cooking condition (1) The oven should be plugged in at least two minutes before sensor cooking. (2) Room temperature should not exceed 95˚F (35˚C). (3) The unit should not be installed in any area where heat and steam are generated. The unit should not be installed, for example, next[...]

  • Page 22

    20 R-930AK R-930AW Plunger NC NO COM COM NO NC R3 R4 R1 R2 1 2 3 F-1 F-2 F-3 To connector (F) on Control Unit. CONNECTOR TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST NOTE: ERROR will appear if the door is opened or STOP/CLEAR pad is touched during first stage of sensor cooking. (6) After approximately 16 seconds, microwave energy is produced, an[...]

  • Page 23

    21 R-930AK R-930AW The touch control section consists of the following units as shown in the touch control panel circuit. (1) Key Unit (2) Control Unit The principal functions of these units and the signals communicated among them are explained below. Key Unit The key unit is composed of a matrix, signals P10 - P17 generated in the LSI are sent to [...]

  • Page 24

    22 R-930AK R-930AW 1 VCC IN Connected to GND. 2 VEE IN Anode (segment) of Fluorescent Display light-up voltage: -30V. Vp voltage of power source circuit input. 3 AVSS IN Power source voltage: -5V. VC voltage of power source circuit input. 4 VREF IN Reference voltage input terminal. A reference voltage applied to the A/D converter in the LSI. Connec[...]

  • Page 25

    23 R-930AK R-930AW 17 P51 OUT Magnetron high-voltage circuit driving signal. To turn on and off the cook relay(RY2). In P-HI operation, the signals holds "L" level during microwave cooking and "H" level while not cooking. In other cooking modes (P-90, P-80, P-70, P-60, P-60, P-50, P-40, P-30, P-20, P-10, P-0) the signal turns to[...]

  • Page 26

    24 R-930AK R-930AW 34 P26 IN Signal similar to P27. When any one of G-2 line key on key matrix is touched, a corresponding signal will be input into P26. 35 P25 IN Signal similar to P27. When any one of G-3 line key on key matrix is touched, a corresponding signal will be input into P25. 36 P24 IN Signal similar to P27. When any one of G-4 line key[...]

  • Page 27

    25 R-930AK R-930AW Pin No. Signal I/O Description 48 P10 OUT Segment data signal. Signal similar to P23. Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P24-P27 terminal while one of G-5 line keys on key matrix is touched. 49-53 P07-P03 OUT Segment data signal. Signal similar to P23. 54-56 P02-P00 OUT Digit select[...]

  • Page 28

    26 R-930AK R-930AW SERVICING approx. 1M ohm Transistor 2SB910M E C B E C B Transistor DTA123ES KRA101M KRA223M KRC243M 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedanc[...]

  • Page 29

    27 R-930AK R-930AW COMPONENT REPLA CEMENT AND ADJUSTMENT PROCEDURE CAUTION: DISCONNECT OVEN FROM POWER SUPPLY BEFORE REMOVING OUTER CASE. DISCHARGE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING AFTER REMOVING OUTER CASE. OUTER CASE SWITCHES REPLACEMENT Removal 1. Disconnect the oven from the power supply and remove the outer [...]

  • Page 30

    28 R-930AK R-930AW POSITIVE LOCK ® CONNECTOR (NO-CASE TYPE) REMOVAL Push the lever of positive lock ® connector. Pull down on the positive lock ® connector. CAUTION: WHEN YOU CONNECTING THE POSITIVE LOCK ® CONNECTORS TO THE TERMINALS, INSTALL THE POSITIVE LOCK ® SO THAT THE LEVER FACES YOU. Figure C-2. Positive lock ® connector Terminal Push [...]

  • Page 31

    29 R-930AK R-930AW FAN MOTOR REMOVAL 1. Disconnect the oven from power supply. Remove the turntable tray, and the turntable support out of the oven cavity. 2. Turn the oven upside down and remove one (1) screw holding the turntable motor cover to the base plate and take off the turntable motor cover. TURNTABLE MOTOR REMOVAL 3. Disconnect wire lead [...]

  • Page 32

    30 R-930AK R-930AW CONTROL PANEL ASSEMBLY AND CONTROL UNIT REMOVAL To remove the control panel, procedure as follows: 1. Disconnect oven from power supply and remove outer case. 2. Discharge high voltage capacitor. 3. Disconnect connector CN-A, CN-E and CN-F from the control unit. 4. Disconnect the wire leads from the relays RY1, RY2 and RY3. 5. Re[...]

  • Page 33

    31 R-930AK R-930AW DOOR REPLACEMENT AND ADJUSTMENT REMOVAL 1. Disconnect oven from power supply and remove the outer case. Remove turntable tray and turntable support from oven cavity. 2. Remove three (3) screws holding lower oven hinge. 3. Remove the lower oven hinge from oven cavity bottom flange. 4. Remove door assembly from upper oven hinge on [...]

  • Page 34

    32 R-930AK R-930AW 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 function does not require that door be airtight, moisture (condensation)-tight or light-tight. Therefore, occasional appearance of moisture, light or sensing of gentle war[...]

  • Page 35

    33 R-930AK R-930AW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H TURNTABLE  MOTOR GRY BRN ORG GRN RED BLK DAMPER  MOTOR COOLING FAN  MOTOR OUTER CASE SWITCH (Oven side) OUTER CASE SWITCH (Cabinet side) RED PNK RED BLK OVEN THERMAL CUT-OUT MAGNETRON TEMPERATURE FUSE GRY IC-1 RED 1 2 3 4 5 6 PNK RED GRN WHT[...]

  • Page 36

    34 R-930AK R-930AW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-2. Control Panel Circuit + – + – + – + – + – + – A9 A7 A1 A3 A5 E1 E2 E5 E6 E3 E4 F1 F2 F3 G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G 9 G10 G11 G12 NO NO NO COM COM COM VRS1 C1 0.1 µ /50v C22 0.1 µ /50v C3 0.1 µ /50v C5 0.1 µ /50v C9 0.01 µ /50v C4 10 µ /35v [...]

  • Page 37

    35 R-930AK R-930AW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H Figure S-3. Printed Wiring Board R R 0 1 2 1 31 1 1 1 1 1 65 4 3 2 1 1 135 7 9 45 7 8 3 3 1 4 58 12 12 12 32 33 64 3 4 6 9 13 CONV HEATER COM RED BRN ORG BLK PINK RED (BRN RED) D25 RY3 RY2 RY1 RY5 RY4 RY6 C11 R10 R11 D31 D30 D24 D23 18 17 16 19 21 22 23 24 14 15 B B B B [...]

  • Page 38

    R-930AK R-930AW 36 P ARTS LIST ◊ Refer to "MPORTANT" described at end of parts list. REF. NO. PART NO. DESCRIPTION Q'TY CODE ELECTRICAL PARTS 1- 1 FACCDA048WRE0 Power supply cord 1 AT 1- 2 FFS-BA012WRK0 Monitor fuse 20A and monitor switch (V-5220D-070) assembly 1A H 1- 3 QFSHDA009WRE0 Fuse holder 1 AF 1- 4 QSW-MA110WRE0 Secondary i[...]

  • Page 39

    37 R-930AK R-930AW REF. NO. PART NO. DESCRIPTION Q'TY CODE IC1 RH-IZA797DRE0 LSI 1 AX IC2 RH-IZA495DRE0 IC 1 AL Q1 VS2SB910MR/-4 Transistor (2SB910M) 1 AE Q3 VSKRA101M//-3 Transistor (KRA101M) 1 AB Q4 VSDTA123ES/-3 Transistor (DTA123E) 1 AA Q20-23 VSKRA101M//-3 Transistor (KRA101M) 4 AB Q24-25 VSKRA223M//-3 Transistor (KRA223M) 2 AB Q26 VSKRC2[...]

  • Page 40

    R-930AK R-930AW 38 REF. NO. PART NO. DESCRIPTION Q'TY CODE 4-27 PREFHA053WRW0 Thermal protection plate (Right) 1 AP 4-28 PSKR-A153WRW0 Air guide (Bottom) 1 AK 4-29 PSKR-A323WRW0 Air guide (Right) 1 AF 4-30 LANGQA407WRW0 Convection motor mounting plate 1 AG 4-31 NPLYBA021WRF0 Pulley (M) 1 AC 4-32 NFANJA020WRE0 Fan blade 1 AE 4-33 PDUC-A270WRF0 [...]

  • Page 41

    39 R-930AK R-930AW 7-24 XOTSD40P12000 Screw; 4mm x 12mm 22 AA 7-25 XFPSD30P08000 Screw; 3mm x 8mm 2 AA 7-26 XNESD40-32000 Nut; 4mm x 3.2mm 2 AA 7-27 XNEUW40-32000 Nut; 4mm x 3.2mm 1 AA 7-28 XWSUW40-10000 Washer; 4mm x 1 mm 1 AA REF. NO. PART NO. DESCRIPTION Q'TY CODE HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correct[...]

  • Page 42

    R-930AK R-930AW 40 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H OVEN AND CABINET PARTS 1-10 1-11 7-24 2-1 7-24 2-6 7-12 7-16 A 7-4 7-24 1-19 7-24 4-32 7-19 4-33 4-41 4-15 7-26 1-14 7-10 TO OVEN  BASE PLATE 7-3 4-8 4-4 4-10 7-1 4-36 4-12 1-15 7-21 7-28 7-27 4-9 7-11 1-5 7-21 7-1 7-14 7-24 4-31 1-13 4-30 4-7 7-21 4-29 4-1 4-22 4-23 7-11 7[...]

  • Page 43

    41 R-930AK R-930AW 6 45 1 2 3 6 45 1 2 3 A B C D E F G H A B C D E F G H DOOR PARTS CONTROL PANEL PARTS MISCELLANEOUS 5-3 5-10 5-1 5 Actual wire harness may be different than illustration. 6-4 6-1 6-5 6-6 6-7 6-2 5-10 5-10 5-9 5-5 5-4 5-7 5-8 5-6 5-2 5-5 x 3 x 2 7-24 7-24 3-5 3-4 3-7 3-3 3-2 3-2-1 3-2-3 3-2-2 3-6 3-1[...]

  • Page 44

    R-930AK R-930AW 42 '97 SHARP CORP. (6K2.770E) Printed in U.S.A[...]