Sharp R-430DK Service Manual

Microwave oven

Hide thumbs Also See for R-430DK:

Operation manual (32 pages)

Table of Contents

Quick Links

Summary of Contents for Sharp R-430DK

Page 1: Table Of Contents
PARTS LIST ............................... 45 PACKING AND ACCESSORIES ........................50 This document has been published to be used for after sales service only. SHARP ELECTRONCS CORPORATION The contents are subject to change without notice. Service Headquarters: Sharp Plaza, Mahwah, New Jersey, 07430-2135...
Page 2: Precautions To Be Observed Before And During Servicing To Avoid Possible Exposure To Excessive Microwave Energy
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 door open, service person should 1) tell the user not to operate the oven and 2) contact SHARP ELECTRONICS CORPORATION and Food and Drug Administration's Center for Devices and Radiological Health immediately.
Page 3: Warning To Service Personnel
R-430DK R-430DW R-430DQ R-440DK R-440DW WARNING TO SERVICE PERSONNEL Microwave ovens contain circuitry capable of pro- ducing 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 Trans- former, Magnetron, High Voltage Rectifier Assem- bly, High Voltage Harness etc..
Page 4: Microwave Measurement Procedure
R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW 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/cm 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/cm...
Page 5 R-430DK/DW/DQ R-440DK/DW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service OPERATION Personnel with Operation and Service Information for the SHARP MICRO- WAVE OVENS, R-430DK, R-430DW, R-430DQ, R-440DK & R-440DW. It is recommended that service personnel carefully study the entire text of...
Page 6: General Information
P-20 ..............approx. 20% of Full Power P-10 ..............approx. 10% of Full Power P-0 ............. No power throughout the cooking time R-430DK Sensor Cooking Pads, Breakfast Bar pads, Lunch on the run pad, One R-430DW Dish Dinner pad, Super Defrost pad, MINUTE PLUS pad, Compu...
Page 7: Oven Diagram
R-430DK R-430DW R-430DQ R-440DK R-440DW adapter properly grounded and polarized. If the extension cord must be used, it should be a 3-wire, 15 amp. or higher rated cord. Do not drape over a countertop or table where it can be pulled on by children or tripped over accidentally.
Page 8: Operation
(2) When the door is closed from the open position, the control unit. (Figure O-1). monitor switch contacts open first. Then the contacts of 1. The display will show flashing"SHARP SIMPLY PRESS the secondary interlock switch and door sensing switch CLEAR AND PRESS CLOCK"...
Page 9 R-430DK R-430DW R-430DQ R-440DK R-440DW 2. The coil of shut-off relay (RY-1) is energized, the turntable motor are turned on, but the power transformer SENSOR COOKING CONDITION is not turned on. 3. After about 16 seconds, the cook relay (RY-2) is Using the SENSOR function, food is cooked without figuring energized.
Page 10: Oven Schematic-Cooking Condition
R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY MAGNETRON MONITOR TEMP. FUSE 20A FUSE COM.
Page 11: Description And Function Of Components
R-430DK R-430DW R-430DQ R-440DK R-440DW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM open, the monitor fuse blows simultaneously with closing of the monitor switch contacts. The door is opened by pushing the open button on the control CAUTION: BEFORE REPLACING A BLOWN MONITOR panel, refer to the Figure D-1.
Page 12: Troubleshooting Guide
R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW TROUBLESHOOTING GUIDE Never touch any part in the circuit with your hand or an uninsulated tool while the power supply is connected. When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks.
Page 13: Test Procedure
R-430DK R-430DW R-430DQ R-440DK R-440DW CK = Check / RE = Replace RE RE A B C D E E F F G H RE RE CK I CK CK CK J K L TEST PROCEDURE POSSIBLE CAUSE DEFECTIVE PARTS...
Page 14 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 4. 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.
Page 15 R-430DK R-430DW R-430DQ R-440DK R-440DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER HIGH VOLTAGE RECTIFIER TEST 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Isolate the rectifier from the circuit. Using the highest ohm scale of the meter, read the resistance across the terminals and observe, reverse the leads to the rectifier terminals and observe meter reading.
Page 16 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERA- TURE, REPLACE TEMPERATURE FUSE.
Page 17 R-430DK R-430DW R-430DQ R-440DK R-440DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 5. Reconnect all leads removed from components during testing. 6. Reinstall the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all Screw Driver functions.
Page 18 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q TEST PROCEDURES R - 4 4 0 D K R-440DW PROCEDURE LETTER COMPONENT TEST The following symptoms indicate a defective key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed.
Page 19 (1) Place one cup of water in the center of the turntable tray in the oven cavity. (2) For R-430DK/DW/DQ, Close the door, touch the " Compu Defrost " pad three times and touch the number pad 5. And then touch the start pad.
Page 20 5) Make a visual inspection of the varistor. Check for burned damage and examine the transformer with a tester for the presence of layer short-circuit (for R- CN - A R-430DK/DW/DQ (J1) 430D K/DW/DQcheck the primary coil resistance which is approximately 210 ohm ± 15%). (for R-440DK/DW/DQ check the primary coil resistance which is approximately 133 ohm ±...
Page 21 (3) Place the container on the center of tray in the oven cavity. (4) Close the door. (5) For R-430DK/DW/DQ, Touch SENSOR REHEAT pad once and touch the start pad. Now, the oven is in the sensor cooking condition "SENSOR REHEAT" will appear in the display. For R-440DK/DW, Touch Reheat pad.
Page 22 For R-440DK/DW, Touch Reheat pad. 9-2 The control panel is in the sensor cooking operation. 9-3 For R-430DK/DW/DQ, after approximately 30 seconds, push plunger of select switch for more than 3 seconds. For R-440DK/DW, after approximately 50 seconds, push plunger of select switch for more than 3 seconds.
Page 23: Touch Control Panel
R-430DW R-430DQ R-440DK R-440DW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL FOR R-430DK/DW/DQ The touch control section consists of the following units. 3) Power Source Circuit This circuit generates voltages necessary in the control (1) Key Unit unit from the AC line voltage.
Page 24 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW 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 "L"...
Page 25 R-430DK R-430DW R-430DQ R-440DK R-440DW Pin No. Signal Description AVSS Connected to VC. 28-31 Terminal to change cooking input according to the Model. ANI0-ANI3 By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in operation is applied to set up its cooking constant.
Page 26 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW Pin No. Signal Description 51-54 Terminal not used. COM0-COM3 BIAS Terminal not used. VLC0 Terminal not used. 57-58 Terminal not used.
Page 27 R-430DW R-430DQ R-440DK R-440DW ABSOLUTE HUMIDITY SENSOR CIRCUIT R-430DK/DW/DQ (1) Structure of Absolute Humidity Sensor With this voltage given, the switches SW1 to SW5 in the The absolute humidity sensor includes two thermistors LSI are turned on in such a way as to change the as shown in the illustration.
Page 28 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q TOUCH CONTROL PANEL ASSEMBLY R - 4 4 0 D K R-440DW OUTLINE OF TOUCH CONTROL PANEL FOR R-440DK/DW This circuit generates a signal which resets the LSI The touch control section consists of the following units.
Page 29 R-430DK R-430DW LSI(IXA029DR) : R-440DK/DW R-430DQ R-440DK The I/O signal of the LSI(IXA029DR) is detailed in the following table. R-440DW Pin No. Signal Description TIOCA2 Terminal not used. Terminal not used. Power source voltage : +5.0V. The power source voltage to drive LSI is input to Vcc terminal. Connected to Vcc.
Page 30 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW Pin No. Signal Description Key strobe signal. Signal applied to touch screen section. A pulse signal is input to PB1-PB5 terminal while one of G10 line keys on key matrix is touched.
Page 31 R-430DK R-430DW R-430DQ R-440DK R-440DW Pin No. Signal Description Write strobe signal is output to WR terminal of IC5. Terminal not used. 75-76 MD0-MD1 Connected to VCC. Connected to GND. Avcc A/D converter power source voltage : +5V. The power source voltage to drive the A/D converter. Connected to VCC.
Page 32 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K ABSOLUTE HUMIDITY SENSOR CIRCUIT (R-440DK/DW) R-440DW increase the voltage available at AN6 terminal of the (1) Structure of Absolute Humidity Sensor LSI.
Page 33 R-430DK R-430DW R-430DQ R-440DK R-440DW TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components 5) Re-connect the power supply cord after the outer This unit uses CMOS LSI in the integral part of the case is installed. circuits. When handling these parts, the following 6) Run the oven and check all functions.
Page 34: Component Replacement And Adjustment Procedure
4. If the outer case (cabinet) is not fitted. WARNING FOR WIRING To prevent an electric shock, take the following pre- 3) Sharp edge: cautions. Bottom plate, Oven cavity, Waveguide flange, 1. Before wiring, Chassis support and other metallic plate.
Page 35: Pictorial Diagram
R-430DK R-430DW R-430DQ R-440DK R-440DW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP PLY BEFORE REMOVING OUTER CASE. 2. DISCHARGE THE HIGH VOLTAGE CA- PACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. Special screw NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations.
Page 36: Lsi Unit Circuit
4. Where the corners have been snipped off bend corner 7. Now the turntable motor is free. areas flat. No sharp edges must be evident after removal 8. After replacement use the one (1) screw to fit the turntable of the turntable motor cover.
Page 37 R-430DK R-430DW R-430DQ R-440DK R-440DW COOLING FAN MOTOR REMOVAL REMOVAL CAUTION: 1. Disconnect the power supply cord and then remove outer * Do not reuse the removed fan blade because the hole case. (for shaft) may be larger than normal.
Page 38 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW 3. Secure latch hook (with two (2) mounting screws) to oven and check continuity of the monitor circuit. Refer to chapter flange.
Page 39 R-430DK R-430DW R-430DQ R-440DK R-440DW SEALER FILM 6. Re-install choke cover to door panel by pushing. Installation Note: After any service to the door; 1. Put the adhesive tape on the backing film of the sealer (A) Make sure that door sensing switch and secondary film as shown in Fig.
Page 40 PRIMARY INTERLOCK RELAY N.O. HIGH VOLTAGE COMPONENTS N.C. COM. MONITOR FUSE & TURNTABLE MONITOR HOLDER MAGNETRON HIGH VOLTAGE MOTOR SWITCH WIRE A HIGH SECONDARY VOLTAGE INTERLOCK CAPACITOR SWITCH COM. POWER H.V. RECTIFIER TRANSFORMER Figure S-1. Pictorial Diagram R-430DK/DW/DQ...
Page 41 NOTE: The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw. CAVITY TEMP. FUSE The screw must always be MAGNETRON TEMP. FUSE kept tight. CN-F AH SENSOR POWER SUPPLY CORD 120V 60Hz DOOR N.O.
Page 42 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW CN-C 12PIN LEAD WIRE HARNESS Q2 2SB1238 R4 27 R5 4.7k D1-D4 11ES1 CN-A 1SS270A 1SS270A –...
Page 43 One Dish Stop Lunch on Power Breakfast Fish/ Frozen Frozen Dinners Clear the Run Level seafood vegetables entrees R71 15k Sensor Baked Custom Super Popcorn reheat potatoes Help Defrost R72 15k R73 15k KEY UNIT Figure S-3(a). CPU Unit Circuit R-430DK/DW/DQ...
Page 44 R10 470 1/2w Q10 KTC1027 WH-1 WH-1 KTC1027 LED1 LED2 C91 0.1µ/25v 4.7k – – C92 0.1µ/25v CPU UNIT C93 0.1µ/25v KRC101S C94 0.1µ/25v R13 4.7k AH SENSOR C95 0.1µ/25v (R101) 4.7k (J10) 4.7k (J11) R41 3.32kD C40 0.1µ/50v (J12) (J13) 4.7k 0.1µ...
Page 45 C120 0.1µ/50v COM4 COM5 IC1 P90 C121 0.1µ/50v COM6 COM7 COM8 IC1 P87 C122 0.1µ/50v IC1 P86 C123 0.1µ/50v LIQUID CRYSTAL DISPLAY IC1 P85 IC1 P84 NOTE : IF NOT SPECIFIED, 1/10W ± 5% Figure s-4. Indicator circuit for R-430DK/DW/DQ...
Page 46: Printed Wiring Board
CN - C CN - B CN - A (J1) (CN - D) (D10) Figure S-5(a) . Printed Wiring Board of Power Unit R-430DK/DW/DQ CN - C VRS1 (J1) CN - A QKITPB031MREO Figure S-5(b) . Printed Wiring Board of Power Unit R-440DK/DW...
Page 47: Parts List
VHEHZ161///-1 Zener diode (HZ16-1) 3- 1-2 DPWBFC041WRKZ LSI unit [R-440DK/DW] 3- 2 FPNLCB285MRK0 Control panel frame with key unit [R-430DK] 3- 2 FPNLCB286MRK0 Control panel frame with key unit [R-430DW] 3- 2 FPNLCB287MRK0 Control panel frame with key unit [R-430DQ]...
Page 48 R - 4 4 0 D K R-440DW REF. NO. PART NO. § DESCRIPTION Q'TY CODE 3- 2- 2 JBTN-B094MRF0 Open button [R-430DK & R-440DK] 3- 2- 2 JBTN-B095MRF0 Open button [R-430DW & R-440DW] 3- 2- 2 JBTN-B096MRF0 Open button [R-430DQ] 3- 2- 3 MSPRTA050WRE0...
Page 49 To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION Order Parts from the authorized SHARP parts Distributor for your area. Defective parts requiring return should be returned as indicated in the Service Policy. Notes:...
Page 50 R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW OVEN AND CABINET PARTS 4-11 1-15 7-10 1-10 1-14 1-11 6-10 4-10 1-12 1-13 7-10 4-12...
Page 51 R-430DK R-430DW R-430DQ R-440DK R-440DW CONTROL PANEL PARTS 3 - 5 3 - 1 3 - 3 3 - 5 3 - 4 3 - 5 3 - 1 3-1-2 3 - 5 3-1-1 3 - 2 3-2-1 3 - 2...
Page 52: Packing And Accessories
R - 4 3 0 D K R- 430DW R - 4 3 0 D Q R - 4 4 0 D K R-440DW PACKING AND ACCESSORIES TOP PAD ASSEMBLY DOOR PROTECTION SHEET PLASTIC BAG TRAY HOLDER 6-5 TURNTABLE TRAY 6-8 OPERATION MANUAL 6-9 RECIPE CARD BOTTOM PAD ASSEMBLY...
Page 53 R-430DK R-430DW R-430DQ R-440DK R-440DW Notes:...
Page 54 No part of this publication may be repro- duced, stored in retrieval systems, or trans- mitted in any form or by any means, elec- tronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher. '00 SHARP CORP. (8M3.20E) Printed in U.S.A...

This manual is also suitable for:

R-430dw R-440dw R-430dq R-440dk

Sharp R-430DK Service Manual

Quick Links

TABLE OF CONTENTS

Related Manuals for Sharp R-430DK

Summary of Contents for Sharp R-430DK

This manual is also suitable for:

Table of Contents