R-930CS SERVICE MANUAL S9913R930CPST CONVECTION MICROWAVE OVEN Custom Help Interactive Minute Plus Sensor Reheat Popcorn Compu Defrost Elevate PKG 1 Baked potatoes 2 Frozen vegetables 3 Fresh veg-soft 4 Fresh veg-hard 5 Frozen entrees 6 Hot dogs 7 Bacon 8 Fish, seafood Sensor Cook Convecvtion CONVECTION 1 Hamburgers 2 Chicken pieces 3 Steaks 4 Fish steaks Compu Broil 1 Chicken 2 Turkey 3 Turkey breast 4 Pork Compu Roast 1 Bundt cake 2 Cookies 3 Muffins 4 French fries Compu Bake Preheat Co
R-930CS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open.
R-930CS WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock. (Example) High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage When the testing is completed, 1.
R-930CS MICROWAVE MEASUREMENT PROCEDURE A. Requirements: 1) Microwave leakage limit (Power density limit): The power density of microwave radiation emitted by a microwave oven should not exceed 1mW/cm2 at any point 5cm or more from the external surface of the oven, measured prior to acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external surface of the oven.
R-930CS SERVICE MANUAL PRODUCT DESCRIPTION CONVECTION MICROWAVE OVEN GENERAL INFORMATION R-930CS FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP CONVECTION MICROWAVE OVEN, R-930CS. It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service. Check the interlock switches and the door seal carefully.
R-930CS SPECIFICATION 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 1450 Watts Convection Power Output Case Dimensions Cooking Cavity Dimensions (1.5 Cubic Feet ) Control Complement Width 24-5/8" Height 14-7/8" Depth 19" Width 16-1/8" Height 9-5/8" Depth 16-1/8" Touch Control System Timer (0 - 99 min.
R-930CS 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 reduce risks of becoming entangled in or tripping over a longer cord.
R-930CS OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. and the secondary interlock switch are activated with the following results. The circuits to the turntable motor, the cooling fan motor, and the high voltage components are de-energized, the oven lamp remains on, and the digital read-out displays the time still remaining in the cook cycle when the door was opened. 7.
R-930CS to zero. 2. The shut-off relays (RY1,RY2,RY3,RY5 and RY6) are energized, turning on the oven lamp, turntable motor, cooling fan motor and convection fan motor. 3. The shut-off relay (RY4) is energized. The damper door is closed from the open position. 4. The heater relay (RY3) is energized, applying the main supply voltage to the heating element. 5. Now, the oven is in the convection cooking condition. 6.
R-930CS convection temperature, the oven goes into the programmed cooking mode. 6. At the end of the COMPU BROIL/ ROAST/ BAKE cycle, the damper is returned to the open position and the oven will go to the off condition. The cooling fan will remain on until the oven has cooled. An example of how sensor works: 1. Potatoes at room temperature. Vapor is emitted very slowly. MIC RO WA VE 2. Heat potatoes. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks. 3.
R-930CS IMPORTANT: During sensor cooking operation, the fire sensing operation sequence will not begin until the AH sensor has detected vapors and initiated a sensor cooking cycle. This is because the operation of the convection fan would interfere with the AH sensor's vapor detection. SCHEMATIC DIAGRAM SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. MAGNETRON TEMPERATURE FUSE RY1 RY6 RY5 RY4 N.O.
R-930CS MAGNETRON TEMPERATURE FUSE A-3 A-1 FM CM COM. (RY1) A-5 RY1 RY6 RY5 RY4 DM N.O. (RY1) RY2 A-9 RY2 PRIMARY INTERLOCK RELAY RY3 CONTROL UNIT F-1 SECONDARY INTERLOCK SWITCH CAPACITOR 0.94µ COM. (RY3) A-7 120V 60Hz POWER TRANSFORMER F-2 F-3 E-1 E-2 E-3 DOOR SENSING SWITCH AH SENSOR N.O. (RY2) N.O. (RY3) E-4 E-5 E-6 THERMISTOR COM. (RY2) DAMPER SWITCH HEATIMG ELEMENT DAMPER MOTOR CONVECTION MOTOR FAN MOTOR OVEN LAMP TURNTABLE MOTOR TTM OL MONITOR SWITCH FUSE H.V.
R-930CS is firmly closed thereby activating both interlock switches. The primary interlock system consists of the door sensing switch and primary interlock relay located on the control circuit board. condition develops in the magnetron due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc. Under normal operation, the temperature fuse remains closed.
R-930CS switch is OFF), its signal is sensed by the control unit, and shut-off relay (RY4) is de-energized. 3-3. The damper is held in the closed position during the convection cooking operation. 3-4. At the end of the convection cooking, shut-off relay (RY4) is energized, and the damper is returned to the open position. NOTE: If the damper door is not in the proper position, closed during convection or open during microwave, the control unit will stop oven operation after 1 minute.
Replace POSSIBLE CAUSE AND DEFECTIVE PARTS A MAGNETRON B C POWER TRANSFORMER H.V. RECTIFIER ASSEMBLY D E HIGH VOLTAGE CAPACITOR SECONDARY INTERLOCK SWITCH F G PRIMARY INTERLOCK SYSTEM MONITOR SWITCH H MONITOR FUSE I J MAGNETRON TEMPERATURE FUSE CONV. THERMAL CUT-OUT K CONVECTION HEATER L THERMISTOR M N DAMPER MOTOR DAMPER SWITCH P TOUCH CONTROL PANEL Q R KEY UNIT RELAY RY-1 R RELAY RY-2 R R RELAY RY-3 RELAY RY-4 R RELAY RY-5 R RELAY RY-6 S T COMP. DEFROST FOIL PATERN ON PWB.
R-930CS TEST PROCEDURES PROCEDURE LETTER A COMPONENT TEST MAGNETRON ASSEMBLY TEST 1. 2. 3. 4. 5. 6. 7. 8. 9. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. 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-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.) C HIGH VOLTAGE RECTIFIER TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Isolate the rectifier from the circuit.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. Reconnect all leads removed from components during testing. Reinstall the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions. NOTE: If the door sensing switch contacts fail in the open position and the door is closed, the turntable motor and oven light will be activated by RY1. PRIMARY INTERLOCK RELAY (RY2) 1.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. I Reconnect all leads removed from components during testing. Reinstall the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions. MAGNETRON TEMPERATURE FUSE TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor.
R-930CS TEST PROCEDURES PROCEDURE LETTER L COMPONENT TEST THERMISTOR TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Disconnect connector-E from the control unit. Measure the resistance of the thermistor with an ohmmeter. Connect the ohmmeter leads to Pin No’s E-3 and E-4. Room Temperature 68˚F(20˚C) - 86˚F(30˚C) 5. 6. 7. 8. 9. M Resistance Approx.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 9. Open the door and block it open. 10.Discharge high voltage capacitor. 11.Reconnect all leads removed from components during testing. 12.Re-install the outer case (cabinet). 13.Reconnect the power supply cord after the outer case is installed. 14.Run the oven and check all functions.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 2. Control Unit The following symptoms indicate a defective control unit. Before replacing the control unit, perform the Key unit test (Procedure Q) to determine if control unit is faulty. Reconnect the power supply cord. And check for followings. 2-1 In connection with pads. a) When touching the pads, a certain group of pads do not produce a signal. b) When touching the pads, no pads produce a signal.
R-930CS TEST PROCEDURES PROCEDURE LETTER R COMPONENT TEST RELAY TEST 1. 2. 3. 4. 5. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Disconnect the leads to the primary of the power transformer. Ensure that these leads remain isolated from other components and oven chassis by using insulation tape. 6. After that procedure, re-connect the power supply cord. 7. Remove the outer case and check voltage between Pin Nos.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 3) Discharge high voltage capacitor. 4) Follow the troubleshooting guide given below for repair. STEPS OCCURRENCE CAUSE OR CORRECTION 1 Only pattern at "a" is broken. *Insert jumper wire J1 and solder. 2 Pattern at "a" and "b" are broken. *Insert the coil RCILF2003YAZZ between "c" and "d". 5 b 3 T1 26 9 CN - A POWER a (J1) 7 6) 7) 8) 9) P d VRS1 3 CONV M FAN M 5) Make a visual inspection of the varistor.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (5) (6) (7) (8) permit adequate ventilation, be sure to install so as not to block these vents. There should be some space for air circulation. Be sure the exterior of the cooking container and the interior of the oven are dry. Wipe off any moisture with a dry cloth or paper towel. The Sensor works with food at normal storage temperature. For example, chicken pieces would be at refrigerator temperature and canned soup at room temperature.
R-930CS TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (8) After that procedure, re-connect the power supply cord. (9) Check the sensor cook operation proceed as follows: 9-1. Touch SENSOR COOK pad and then touch the number pad 1. And touch Start pad. 9-2. The control panel is in the sensor cooking operation. 9-3. After approximately 20 seconds, push plunger of select switch for more than 3 seconds. This condition is same as judgement by AH sensor. 9-4.
R-930CS 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. 4) ACL Circuit A circuit to generate a signals which resetting the LSI to the initial state when power is applied. (1) Key Unit (2) Control Unit 5) Buzzer Circuit The buzzer is responds to signals from the LSI to emit noticing sounds (key touch sound and completion sound).
R-930CS Pin No. Signal I/O 5 AN7 IN 6 AN6 IN 7-9 10 AN5-AN3 AN2 IN IN 11 AN1 IN 12 AN0 IN 13 P55 OUT 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. AH sensor input. This input is an analog input terminal from the AH sensor circuit, and connected to the A/D converter built into the LSI. Heating constant compensation terminal.
R-930CS Pin No. 18 Signal I/O P50 OUT Description Damper motor relay driving signal. OFF To turn on and off shut-off relay(RY4). 19 P47 OUT P46-P45 P44 OUT OUT 23 P43 OUT 24 P42 OUT 25 INT1 IN 20-21 22 ON H : GND L Heating element driving signal. To turn on and off shut-off relay(RY3). "L" level H. GND During OFF during convection cooking; "H" level otherwise.
R-930CS Pin No. 37 38-40 Signal I/O P23 OUT P22-P20 OUT 41 P17 OUT 42 P16 OUT 43 P15 OUT 44 P14 OUT 45 P13 OUT 46 P12 OUT 47 P11 OUT 48 P10 OUT 49-53 P07-P03 OUT 54-56 P02-P00 OUT 57-59 P37-P35 OUT 60-64 P34-P30 OUT Description Segment data signals. The relation between signals and indicators are as follows: Signal Segment Signal Segment Signal Segment Signal Segment P23 ............. P1 P17 ............. P5 P13 ............. P9 P07 ........... P13 P22 ......
R-930CS ABSOLUTE HUMIDITY SENSOR CIRCUIT With this voltage given, the switches SW1 to SW5 in the LSI are turned on in such a way as to change the resistance values in parallel with R50-1. Changing the resistance values results in that there is the same potential at both F-3 terminal of the absolute humidity sensor and AN7 terminal of the LSI. The voltage of AN6 terminal will indicate about -2.5V. This initial balancing is set up about 16 seconds after the unit is put in the Sensor Cooking mode.
R-930CS TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer case is installed. 6) Run the oven and check all functions. A. On some models, the power supply cord between the touch control panel and the oven itself is so short that the two can’t be separated. For those models, check and repair all the controls (sensor-related ones included) of the touch control panel while keeping it connected to the oven. B.
R-930CS COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING AGAINST HIGH VOLTAGE: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1.
R-930CS CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations. Special screw Screw Driver (Type: TORX T20 H or GTXH20-100) POWER TRANSFORMER REMOVAL 1. Disconnect the power supply cord and then remove outer case. 2. Open the oven door and block it open. 3. Discharge high voltage capacitor. 4.
R-930CS 7. Remove one (1) screw and washer holding the rectifier from the capacitor holder. 8. Remove one (1) screw holding the capacitor holder to the rear cabinet. 9. Remove the capacitor from the holder. POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL Terminal 1. Disconnect the power supply cord and then remove outer case. 2. Open the oven door and block it open. 3. Discharge high voltage capacitor. 4. Push the lever of positive lock® connector. 5. Pull down on the positive lock ® connector.
R-930CS HEATER UNIT ASSEMBLY REMOVAL (HEATING ELEMENT/CONVECTION FAN/CONVECTION MOTOR/THERMISTOR) THERMISTOR REMOVAL HEATING ELEMENT REMOVAL 1. Disconnect the power supply cord and then remove outer case. 2. Open the oven door and block it open. 3. Discharge high voltage capacitor. 4. Disconnect wire leads from H.V. capacitor and remove four (4) screws holding rear cabinet to bottom plate and three (3) screws holding to heater unit assembly and two (2) screws holding steam duct to top of oven cavity.
R-930CS 3. Hold the center of the bracket which supports the shaft of the fan motor on the flat table. 4. Apply the screw lock tight into the hole (for shaft) of the fan blade. 5. Install the fan blade to the shaft of fan motor by pushing the fan blade with a small, light weight, ball peen hammer or rubber mallet. CAUTION: * Do not hit the fan blade strongly when installed because the bracket may be disfigured. * Make sure that the fan blade rotates smooth after installation.
R-930CS misadjustment, the following adjustment should be made. 4. Loosen the two (2) screws holding latch hook to the oven cavity front flange. 5. With door closed, adjust latch hook by moving it back and forth, and up and down. In and out play of the door allowed by the latch hook should be less than 0.5mm. 6. Secure the screws with washers firmly. DOOR SENSING SWITCH MONITOR FUSE After adjustment, check the following. 1. In and out play of door remains less than 0.5mm at the latched position. 2.
R-930CS DOOR DISASSEMBLY DOOR PANEL 5. Remove the twelve (12) screws holding the door panel to the door frame. NOTE: The one (1) screw of the twelve (12) screws also holds the earth terminal of the door decoration to the door frame. 6. Remove the door panel from the door frame. Now the door panel is free. Remove door assembly, refer to "Door Replacement". Replacement of door components are as follows: CHOKE COVER 1. Place door assembly on a soft cloth with latches facing up.
1 2 3 38 4 CN-A RY6 T1 RED BRN BLK ORG ORG BRN BRN 5 1 2 3 4 5 6 7 8 9 WHT PPL BRN ORG CN-A RY1 (N.O.) RY1 (COM.) RY2 (N.O.) RY2 (COM.) RED COM SECONDARY INTERLOCK SWITCH 6 GRY GRY TURNTABLE MOTOR PNK GRY G R Y G R Y BRN GRY CONVECTION MOTOR Figure S-1.
3 39 OVEN LAMP TURNTABLE MOTOR HEATING ELEMENT A5 A3 A1 NO 4 COM NO COM NO COM POWER TRANSFORMER FAN MOTOR CONV. MOTOR DAMPER MOTOR A7 c RY1 RY3 RY2 RY6 RY5 D2 D3 C22 0.1µ/50v (J1) 10G471K RY4 4 D23 C2 1000µ/35v C1 0.1µ/50v + – Q22 KRA101M Q21 KRA101M Q20 KRA101M R3 330 1/2w Q1 2SB1238 5 C11 C3 0.1µ/50v E2 C50 6 Q3 KRA101M R8 4.7k E4 OVEN THERMISTOR E3 R62 27kF F1 (A) (C) F3 AH SENSOR F2 (B) CF1 4.
R-930CS 1 2 4 3 5 6 A A R 1 32 DIP ,F B B E 3 R90 C70 C10 (C81) R86(J8) (ONLY PHR) (CF1) 32 33 CF1 (R85) D70 D71 D72 D73 D74 D75 D76 D77 1 (C80) (R45) (C45) C7 R7 R8 C8 3 C E E 5 B Q4 B Q3 1 12 R79 R78 R77 R76 R75 6 C9 R64 64 9 C5 4 D (C47) IC3 1 8 3 14 R40 1 CN - F 15 16 17 18 6 R31 R30 E B Q24 E 1 B C3 D31 D30 C4 E Q1 D23 RY2 B E E D21 D3 D4 D1 B D20 4 1 S1 1 5 P VRS1 3 5 7 DAMP M CONV M FAN M RY4 E Q22 25 Q20 F D2 E BE Q
R-930CS PARTS LIST Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. PART NO.
R-930CS REF. NO. D20-26 D30-31 D70-77 IC1 IC2 Q1 Q3 Q4 Q20-23 Q24-25 Q26 Q40 Q90 R2 R3 R4 R7-8 R10-11 R30 R31 R40 R50 R51 R62 R63 R64 R70-81 R90-93 R100 (J4) (J5) RY1-3 RY4-6 SP40 T1 VRS1 ZD2 ZD3 ZD4 3- 2 3- 2-1 3- 2-2 3- 2-3 3- 2-4 3- 2-5 3- 3 3- 4 3- 5 3- 6 3- 7 3- 8 PART NO.
R-930CS PART NO.
R-930CS REF. NO. 7-24 7-25 7-26 7-27 7-28 7-29 PART NO. XOTSD40P12000 XHPSD30P08000 XNESD40-32000 XNEUW40-32000 XWSUW40-10000 XOTSD40P12RV0 DESCRIPTION Q'TY 16 2 2 1 1 5 Screw; 4mm x 12mm Screw; 3mm x 8mm Nut; 4mm x 3.2mm Nut; 4mm x 3.2mm Washer; 4mm x 1mm Screw; 4mm x 12mm CODE AA AA AA AA AA AA HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 3. PART NO. 2. REF. NO. 4.
H 1 2 4-30 4-31 1-5 3 45 4-2 4-3 4-9 4-22 4-35 4 2-8 5 7-24 1-20 4-28 7-5 2-10 A 2-4 x4 2-7 7-19 1-4 1-4 4-21 2-9 x3 7-16 7-22 1-7 7-24 4-26 4-38 4-14 1-17 7-24 x5 1-2 7-13 1-3 1-18 x2 7-4 x2 4-40 1-16 7-6 7-23 4-18 6-7 7-20 6-10 1-9 4-39 1-1 4-17 7-10 2-5 4-27 1-19 7-24 6-8 7-17 7-16 1-6 7-9 4-20 1-14 4-41 4-19 7-16 7-26 7-2 4-33 2-2 4-15 A 7-19 4-32 7-2 7-18 5 6 2-3-2 2-3-1 7-22 x2 7-7 7-16 6-4 2-6 7-2 4 7-24 7-8
R-930CS 2 1 4 3 6 5 3-7 CONTROL PANEL PARTS 3-3 A A 3-1 3-6 x3 3-4 3-2 7-24 B B 3-8 3-2-5 3-2-4 3-5 3-7 3-2-1 7-24 C C DOOR PARTS 3-2-3 5 3-2-2 5-12 5-3 D D 5-1 5-13 5-9 5-11 E E 5-4 5-11 5-2 5-11 5-5 5-6 5-7 F F 5-10 5-11 5-8 MISCELLANEOUS 6-5 G 6-1 6-2 G 6-4 Actual wire harness may be different than illustration. 6-6 H H 6-7 1 2 4 3 5 6 '99 SHARP CORP. (9S2.530E) Printed in U.S.
R-930CS COPYRIGHT © 1999 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. '99 SHARP CORP. (5S2.530E) Printed in U.S.
