R - 330DK R -330DW SERVICE MANUAL S3005R330DPW/ MICROWAVE OVEN MODELS R-330DK R-330DW 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. R-330DW 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.
R -330DK R-330DW 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 -330DK R-330DW 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- 330DK R-330DW 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 -330DK R-330DW SERVICE MANUAL PRODUCT DESCRIPTION MICROWAVE OVEN R-330DK/ R-330DW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-330DK, R-330DW. 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- 330DK R-330DW SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1150 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Width 20-1/2" Height 11-7/8" Depth 17-1/8" Width 14-3/4" Height 8-3/4" Depth 15-3/4" Case Dimensions Cooking Cavity Dimensions 1.2 Cubic Feet Control Complement Touch Control System Clock ( 1:00 - 12:59 ) Timer (0 - 99 min.
R -330DK R-330DW contact a qualified electrician and have it replaced with a properly grounded three-pronged wall receptacle or have a grounding 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. CAUTION: DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE ROUND GROUNDING PRONG FROM THIS PLUG.
R- 330DK R-330DW OPERATION DESCRIPTION OF OPERATING SEQUENCE (1) When the door opens from the closed position, the primary interlock relay (RY2) and secondary interlock switch open their contacts. And contacts of the relay (RY1) remains closed. Then the monitor switch contacts close. (2) When the door is closed from the open position, the monitor switch contacts open first. Then the contacts of the secondary interlock switch and door sensing switch close. And contacts of the relay (RY1) open.
R -330DK R-330DW An example of how sensor works: (POTATOES) 1. Potates at room temperature. Vapor is emitted very MIC slowly. RO W AVE 2. Heat Potates. Moisture and humidity is emitted rapidly. You can smell the aroma as it cooks. AH SENSOR MIC RO WA VE 3. Sensor detects moisture and humidity and calculates cooking time and variable power. Cooking Sequence. 1. Touch one of the SENSOR pads. And then touch the Start pad.
R- 330DK R-330DW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY MONITOR FUSE 20A THERMAL CUT-OUT (OVEN) THERMAL CUT-OUT (MG.) N.O. POWER TRANSFORMER N.O. F3 A2 CAPACITOR 0.94µF AC 2300V F2 F1 PRIMARY INTERLOCK RELAY AH SENSOR (RY-2) (RY-1) A1 CONTROL UNIT COM. COM. SH-B GRN 120V AC 60 Hz SH-A DOOR SENSING SWITCH OL OVEN LAMP TTM MONITOR SWITCH FM RECTIFIER MAGNETRON SECONDARY INTERLOCK SWITCH TURNTABLE MOTOR FAN MOTOR Figure O-1.
R -330DK R-330DW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, PRIMARY INTERLOCK RELAY (RY2), RELAY (RY1), SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE"). NOTE: MONITOR FUSE AND MONITOR SWITCH ARE REPLACED AS AN ASSEMBLY. The door is opened by pulling the door. Refer to the Figure D-1.
R- 330DK R-330DW 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. 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.
R -330DK R-330DW CK = Check / RE = Replace Home fuse or circuit breaker blows when power cord is plugged into wall receptacle Monitor fuse blows when power cord is plugged into wall receptacle. OFF CONDITION All letters and indicators do not appear in display when power cord is first plugged into wall outlet. Display does not operate properly when STOP/CLEAR key is touched. (Buzzer should sound and ":" or time of day should appear in display.) Oven lamp does not light when door is opened.
R- 330DK R-330DW 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 -330DK R-330DW 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- 330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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 functions. CAUTION: IF THE THERMAL CUT-OUT INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE THERMAL CUT-OUT. F SECONDARY INTERLOCK SWITCH TEST 1. 2. 3. 4. 5. 6. 7. 8. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor.
R -330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. indicate an open circuit. If improper operation is indicated, the switch may be defective. After testing the monitor switch, reconnect the wire lead to the monitor switch (COM) terminal and check the continuity of the monitor circuit. Reconnect all leads removed from components during testing. Reinstall the outer case (cabinet). Reconnect the power supply cord after the outer case is installed.
R- 330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5) Run the oven and check all functions. 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. c) When touching the pads, sometimes a pad produces no signal. If the Key unit is defective. 1) Disconnect the power supply cord, and then remove outer case. 2) Open the door and block it open.
R -330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. Reconnect all leads removed from components during testing. 6. Re-install the outer case (cabinet). 7. Reconnect the power supply cord after the outer case is installed. 8. Run the oven and check all functions.
R- 330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 1ST STAGE WEIGHT 0.5lb LEVEL 70% 2ND STAGE TIME 40sec. LEVEL 40% TIME 30sec. (5) If improper operation is indicated, the control unit is probably defective and should be checked. M FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs.
R -330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. N AH SENSOR TEST Checking the initial sensor cooking condition WARNING : The oven should be fully assembled before following procedure. (1) The oven should be plugged in at least two minutes before sensor cooking. (2) Room temperature should not exceed 95˚F (35˚C).
R- 330DK R-330DW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 9-5. The control panel is in automatic Sensor operation. 9-6. The display will start to count down the remaining cooking time, and the oven will turn off automatically after the water is boiling (bubbling). If new sensor dose not operate properly, the problem is with the control unit, and refer to explanation below. CHECKING CONTROL UNIT (1) (2) (3) (4) (5) (6) (7) Disconnect the power supply cord, and then remove outer case.
R -330DK R-330DW TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Power Source Circuit This circuit generates voltages necessary in the control unit from the AC line voltage. In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit. The touch control section consists of the following units. (1) Key Unit (2) Control Unit (The Control Unit consists of Power Unit and LSI Unit).
R- 330DK R-330DW Pin No. Signal I/O Description 12 RESET IN Auto clear terminal. Signal is input to reset the LSI to the initial state when power is applied. Temporarily set "L" level the moment power is applied, at this time the LSI is reset. Thereafter set at "H" level. 13 INTP0 IN Connected to VC. 14 INTP1 IN Signal synchronized with commercial power source frequency. This is the basic timing for time processing of LSI. H : GND L : -5V 16.7 msec. 15 P02 OUT Terminal not used.
R -330DK R-330DW Pin No. Signal I/O Description 28-31 ANI0-ANI3 IN Terminal to change cooking input according to the Model. 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. 32 ANI4 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 LSI.
R- 330DK R-330DW ABSOLUTE HUMIDITY SENSOR CIRCUIT (1) Structure of Absolute Humidity Sensor The absolute humidity sensor includes two thermistors as shown in the illustration. One thermistor is housed in the closed vessel filled with dry air while another in the open vessel. Each sensor is provided with the protective cover made of metal mesh to be protected from the external airflow. increase the voltage available at ANI5 terminal of the LSI.
R -330DK R-330DW TOUCH CONTROL PANEL SERVICING 3) Re-connect the leads to the primary of the power transformer. 4) Re-install the outer case (cabinet). 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.
R- 330DK R-330DW 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 -330DK R-330DW NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations. 2. DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING. 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- 330DK R-330DW Reinstallation 1. Re-install the magnetron duct with thermal cut-out (MG) to magnetron with the two (2) screws. 2. Re-install the magnetron to waveguide flange with the four (4) screws. 3. Insert the two (2) tabs of the chassis support to the oven cavity front plate and the back plate. 4. Hold the chassis support to the oven cavity back plate, oven cavity front flang, magnetron and the fan duct with the four (4) screws. 5.
R -330DK R-330DW TURNTABLE MOTOR REMOVAL 1. Disconnect the power supply cord. 2. Remove turntable and turntable support from oven cavity. 3. Lay the oven on it's backside. Remove the turntable motor cover by snipping off the material in four corners. 4. Where the corners have been snipped off bend corner areas flat. No sharp edges must be evident after removal of the turntable motor cover. 5. Disconnect wire leads from turntable motor. (See "Positive lock connector removal") 6.
R- 330DK R-330DW DOOR SENSING SWITCH/SECONDARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL Reinstallation 1. Re-install each switch in its place. The secondary interlock/monitor switches are in the lower position and the door sensing switch is in the upper position. 2. Re-connect wire leads to each switch. Refer to pictorial diagram. 3. Secure latch hook (with two (2) mounting screws) to oven flange. 4. Make sure that the monitor switch is operating properly and check continuity of the monitor circuit.
R -330DK R-330DW 11.Now, door panel with sealer film is free. 12.Tear sealer film from door panel. 13.Now, door panel is free. 14.Slide latch head upward and remove it from door frame with releasing latch spring from door frame and latch head. 15.Now, latch head and latch spring are free. 16.Remove door screen from door frame. 17.Now, door screen is free. Pin Upper Oven Hinge REINSTALLATION 1. Re-install door screen to door frame. 2. Re-install the latch spring to the latch head.
H 1 2 3 32 BLK 4 (POWER UNIT) YLW BLK RED RED CN-A 1 WHT 2 GRN RED N.C. 5 COM. TURNTABLE MOTOR D WHT BLK WHT GRY BLK BLK RED GRY GRY BLK NOTE: The neutral (WHT) wire must be connected to the neutral (WHT) wire of the power supply cord. POWER SUPPLY CORD 120V 60Hz POWER TRANSFORMER HIGH VOLTAGE WIRE B MAGNETRON HIGH VOLTAGE CAPACITOR HIGH VOLTAGE COMPONENTS BLK THERMAL CUT-OUT (MG) WHT 5 Figure S-1.
R -330DK R-330DW 2 1 4 3 6 5 A A CN-C 12PIN LEAD WIRE HARNESS B Q2 2SB1238 – LED C2 GND + – C4 10µ/35v b + C3 0.1µ/50v a 1SS270A C10 B R5 4.7k ZD1 HZ16-1 d C 1SS270A C1 0.1µ/50v A2 10G471K AC VRS1 A1 D6 C2 1000µ/35v D1-D4 11ES1 T1 CN-A D5 R1 2.4k R4 27 C C3 VC C1 VA C4 INT C9 VR C5 BUZZER C6 OVEN LAMP TURNTABLE MOTOR FAN MOTOR R3 510 1/2w (J1) Q1 2SB1238 R2 680 1/2w c D D SP1 PKM22EPT Q3 KRC243M R6 3.
34 C-12 DOOR SENSING SWITCH 4 NOTE C-11 C-8 (BROWNER) C11 0.1µ/50v Q21 DTA123JKA Q20 DTA143EKA F-2 C20 0.1µ /50v C12 0.1µ /50v F-3 R92 1.8kF R10 1k E 5 6 7 8 IC2 BA4558 1 2 3 4 C13 0.
3 35 4 IC1 P84 NOTE R127 4.7k R134 15k R126 4.7k R125 4.7k R124 4.7k R123 4.7k : IF NOT SPECIFIED, 1/10W ± 5% C125 0.1µ/50v 51 OSC4 OSC3 VD1 OSC2 OSC1 VSS BZ COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 IC3 IZA951DR 100 75 76 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 1 LIQUID CRYSTAL DISPLAY 4 5 5 Figure S-4.
R- 330DK R-330DW 2 1 4 3 6 5 A A DIP 1 R3 ZD1 D1 (D20) D2 D4 C2 E Q3 (D10) D9 C C1 D3 B C5 (J2) D (CN - B) D5 R4 D6 E 1 2 SP1 2 B Q2 C4 B R1 E C 1 R5 R2 B 12 C3 R6 (RED) (GREEN) SH - B SH - A CN - C SW B D D7 D8 RY2 1 3 (CN - D) E E RY1 RY3 P F S F (J1) VRS1 G G T1 2 1 CN - A F H H Figure S-5.
R - 330DK R -330DW 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 -3 30DK R-330DW REF. NO. ∆ 4- 5 4- 6 4- 7 4- 8 4- 9 4-10 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 4-20 4-21 4-22 4-23 4-24 4-25 PART NO.
R - 330DK R -330DW 2 1 4 3 7-5 2-1 OVEN AND CABINET PARTS 6 5 7-8 A A 7-5 4-23 4-25 7-1 4-22 1-15 7-2 1-10 4-17 B 7-8 7-2 1-11 1-13 1-4 4-20 1-8 7-3 7-6 7-6 6-7 7-7 7-3 4-13 4-24 4-23 6-6 4-9 4-11 C B C 7-6 7-3 4-19 4-7 4-10 7-3 D 6-9 D 1-5 7-4 4-20 4-22 7-1 4-12 1-7 4-21 1-6 4-15 E 7-6 E 1-1 7-9 4-14 6-2 4-4 4-2 4-18 1-12 1-2 7-6 1-3 4-8 4-5 F 7-1 6-1 1-14 4-3 7-3 7-6 1-1 F 7-5 7-1 4-16 4-1 2-2 4-15 4-6 2-4 G 1-9 G 7-6 2-3 7-6 H H
R -3 30DK R-330DW 2 1 4 3 6 5 3-6 CONTROL PANEL PARTS 3-2 A 3-3 A 3-5 3-4 3-6 B B 3-1 3-3-1 DOOR PARTS 5-9 C C 5-7 5-2 5-7 D D 5-1 5-7 E E 5-3 5-7 5-5 F F 5-4 5-6 5-8 G G 6-3 MISCELLANEOUS (CAPACITOR) 6-4 6-5 Actual wire harness may be different from illustration.
R - 330DK R -330DW 2 1 4 3 6 5 PACKING AND ACCESSORIES A A TOP PAD ASSEMBLY FPADBA416WRKZ DOOR PROTECTION SHEET SPADPA204WRE0 B B PLASTIC BAG SSAKHA034WRE0 6- 8 INSTRUCTION BOOK & PRINTING MATTER 6-10 RECIPE SHEET 6- 2 C TURNTABLE TRAY C BOTTOM PAD ASSEMBLY FPADBA417WRKZ 6- 1 TURNTABLE SUPPORT TRAY PACK INTO THE OVEN CAVITY SPADFA451WRE0 D D Not replaceable items.
R -3 30DK R-330DW COPYRIGHT © 2000 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. 2000 SHARP CORP. (3S2.530E) Printed in U.S.
