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R-230EW
BEFORE SERVICING ...................................................................................................... INSIDE FRONT COVER
WARNING TO SERVICE PERSONNEL ................................................................................................................ 1
MICROWAVE MEASUREMENT PROCEDURE ................................................................................................... 2
FOREWORD AND WARNING ............................................................................................................................... 3
PRODUCT SPECIFICATIONS .............................................................................................................................. 4
GENERAL INFORMATION ................................................................................................................................... 4
OPERATION .......................................................................................................................................................... 6
TROUBLESHOOTING GUIDE .............................................................................................................................. 9
TEST PROCEDURE ............................................................................................................................................ 10
TOUCH CONTROL PANEL ................................................................................................................................. 18
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ................................................................ 22
PICTORIAL DIAGRAM ........................................................................................................................................ 28
CONTROL PANEL CIRCUIT ............................................................................................................................... 29
PARTS LIST ........................................................................................................................................................ 31
PACKING AND ACCESSORIES ......................................................................................................................... 32
SHARP CORPORATION
SERVICE MANUAL
MODELS
ON
DEF. LBS.
QTY. CHECK
POPC ORN
MINU TE PLUS
1 DINNER
2 SOUP
PLATE
3 PIZZA
4 FRESH
ROLLS /MUFF
5 FROZE N
INS
REH EAT
ROLLS /MUFF
6 BEVER AGE
INS
CEN TER
TO ADJUS
T QUANT ITY
- TOUCH PAD
BAK ED
AGAIN
POT ATO ES
FRE SH
VEG ETA BLE
S
FRO ZEN
ENT REE S
FRO ZEN
VEG ETA BLE
S
COM PU DEF
ROS T
1 GROUN D
MEAT 2 STEAK
S/CHO PS
3 CHICK EN
1
PIECES
2
3
4
5
6
7
8
9
CLO CK
0
KIC TCH
EN
TIM ER
POW ER
LEV EL
STO P
CLE AR
ST AR T
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.
WARNING TO SERVICE PERSONNEL: Microwave ovens con-
tain circuitry capable of producing very high voltage and
current, contact with following parts may result in a severe,
possibly fatal, electrical shock. (High Voltage Capacitor, High
Voltage Power Transformer, Magnetron, High Voltage Recti-
fier Assembly, High Voltage Harness etc..)
TABLE OF CONTENTS
MICROWAVE OVEN
R-220EW
R-230EK
R-230EW
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-220EW
R-230EK
R-230EW
S1101R220EPW/
Page
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Summary of Contents for Sharp R-220EW
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Page 1: Table Of Contents
R-220EW R-230EK R-230EW SERVICE MANUAL S1101R220EPW/ MICROWAVE OVEN R-220EW MODELS R-230EK DEF. LBS. QTY. CHECK R-230EW POPC ORN MINU TE PLUS 1 DINNER 2 SOUP PLATE 3 PIZZA 4 FRESH ROLLS /MUFF 5 FROZE N REH EAT ROLLS /MUFF 6 BEVER AGE... -
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-220EW R-230EK R-230EW 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 - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W 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: Foreword And Warning
MICROWAVE OVEN R-220EW/ R-230EK/ R-230EW GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. OPERATION Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-220EW, R-230EK, R-230EW. It is recommended that service personnel carefully study the entire... -
Page 6: Product Specifications
P-0 ........No power throughout the cooking time POPCORN pad, MINUTE PLUS pad REHEAT CENTER pad, Instant Start pads EXPRESS DEFROST pad [R-220EW], COMPU DEFROST pad [R-230EK/W] Number selection pads, CLOCK pad KITCHEN TIMER pad, POWER LEVEL pad STOP/CLEAR pad, START pad... - Page 7 R-220EW R-230EK R-230EW 15 or 20 amp. fused electrical supply. It is recommended that a separate Grounded circuit serving only this appliance be provided. When installing this 3-Pronged Plug Receptacle Box 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.
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Page 8: Operation
R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during relay (RY2) and is mechanically associated with the door oven operation. - Page 9 R-220EW R-230EK R-230EW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY NOTE: " " indicates components with potential above 250V. C/T FUSE MAGNETRON THERMAL CUT-OUT COM. POWER TRANSFORMER N.O. (RY-1) (RY-2) PRIMARY INTERLOCK RELAY CAPACITOR CONTROL UNIT 0.86µF...
- Page 10 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM ARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (RE- The door is opened by pulling the door, refer to the Figure FER TO CHAPTER "TEST PROCEDURE").
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Page 11: Troubleshooting Guide
R-220EW R-230EK R-230EW 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. -
Page 12: Test Procedure
R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W CK = Check / RE = Replace A B C D E F F G H TEST PROCEDURE RE CK RE RE CK CK CK CK J POSSIBLE CAUSE... - Page 13 R-220EW R-230EK R-230EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 5. To test for a shorted magnetron, connect the ohmmeter leads between the magnetron filament leads and chassis ground. This test should indicate an infinite resistance. If there is little or no resistance the magnetron is grounded and must be replaced.
- Page 14 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER HIGH VOLTAGE RECTIFIER TEST 1. Disconnect the power supply cord, and then remove outer case. 2.
- Page 15 R-220EW R-230EK R-230EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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. PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1.
- Page 16 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER BLOWN C/T FUSE TEST 1. Disconnect the power supply cord, and then remove outer case. 2.
- Page 17 R-220EW R-230EK R-230EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 2) Open the door and block it open. 3) Discharge high voltage capacitor. 4) Replace the key unit. 5) Reconnect all leads removed from components during testing. 6) Re-install the outer case (cabinet).
- Page 18 13. Reconnect the power supply cord after the outer case is installed. 14. Run the oven and check all functions. EXPRESS DEFROST TEST (R-220EW) (1) Place one cup of water in the center of the turntable tray in the oven cavity.
- Page 19 R-220EW R-230EK R-230EW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER MENU 1ST STAGE 2ND STAGE 3RD STAGE LEVEL TIME LEVEL TIME LEVEL TIME GROUND MEAT 0.5lb 1min.5sec. 27sec. 55sec. (5) If improper operation is indicated, the control unit is probably defective and should be checked.
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Page 20: Touch Control Panel
R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL 3) Power Source Circuit The touch control section consists of the following units as This circuit generates voltage necessary in the control shown in the touch control panel circuit. - Page 21 R-220EW R-230EK R-230EW DESCRIPTION OF LSI The I/O signal of the LSI are detailed in the following table. Pin No. Signal Description RESET Auto clear terminal. Signal is input to reset the LSI to the initial state when power is supplied. Temporarily set to “L”...
- Page 22 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W Pin No. Signal Description Signal similar to K02. When either G7 line on key matrix is touched, a corresponding signal will be input into P23. Signal similar to K02.
- Page 23 R-220EW R-230EK R-230EW SERVICING 1. Precautions for Handling Electronic Components A. On some models, the power supply cord between the This unit uses CMOS LSI in the integral part of the touch control panel and the oven itself is so short that the circuits.
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Page 24: Component Replacement And Adjustment Procedure
WARNING FOR WIRING To prevent an electric shock, take the following pre- and Oven cavity. cautions. 3) Sharp edge: 1. Before wiring, Bottom plate, Oven cavity, Waveguide flange, 1) Disconnect the power supply cord. Chassis support and other metallic plate. - Page 25 R-220EW R-230EK R-230EW CAUTION: 1. DISCONNECT OVEN FROM POWER SUP- NOTE: When replacing the outer case, the 2 special PLY BEFORE REMOVING OUTER CASE. Torx screws must be reinstalled in the same 2. DISCHARGE THE HIGH VOLTAGE CA- locations. PACITOR BEFORE TOUCHING ANY OVEN COMPONENTS OR WIRING.
- Page 26 Reinstallation 3. Turn the oven over. 1. Remove the any sharp edges on the turntable motor 4. Cut the four (4) bridges holding the turntable motor cover cover and the bottom plate with the cutting pliers. to the bottom plate with the cutting pliers as shown in 2.
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Page 27: Pictorial Diagram
R-220EW R-230EK R-230EW COOLING FAN MOTOR REMOVAL 16.Remove the two (2) screws holding the fan motor to the REMOVAL fan duct. 1. Disconnect the power supply cord and remove outer case. 17.Now, the fan motor is free. 2. Open the door and block it open. - Page 28 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W switch. But the switch will be caught by the bar of the front flange. latch hook. 5. Re-connect wire leads to the control unit. Refer to 8-2.
- Page 29 R-220EW R-230EK R-230EW cycle. This function does not require that door be air- tight, moisture (condensation)-tight or light-tight. Choke Cover Therefore, occasional appearance of moisture, light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves, indicate a leakage of microwave energy from oven cavity.
- Page 30 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W...
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Page 31: Control Panel Circuit
R-220EW R-230EK R-230EW... - Page 32 R - 2 2 0 E W R - 2 3 0 E K R - 2 3 0 E W...
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Page 33: Parts List
Control unit [R-230EK] 3- 1 DPWBFC159WRUZ Control unit [R-230EW] 3- 2 FPNLCB550WRKZ Control panel frame with key unit and LCD [R-220EW] 3- 2 FPNLCB551WRKZ Control panel frame with key unit and LCD [R-230EW] 3- 2 FPNLCB552WRKZ Control panel frame with key unit and LCD [R-230EK]... -
Page 34: Packing And Accessories
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. TOP PAD ASSEMBLY... - Page 35 R-220EW R-230EK R-230EW OVEN AND CABINET PARTS 7-12 from Feb. 2001 production 1-9b 7-10 4-2b for Jan. 2001 7-10 production 1-9a 7-11 4-2a 4-17 4-14 4-14 4-11 1-11 4-16 1-10 4-10 4-15 1-12 4-13 4-12...
- Page 36 No part of this publication may be reproduced, stored in retrieval systems, or transmitted in any form or by any means, electronic, mechanical, pho- tocopying, recording, or otherwise, without prior written permission of the publisher. 2001 SHARP CORP. (1S2.530E) Printed in U.S.A...