Table of Contents
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R-230DW
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
1. Grou nd mea
t
2.Ste aks/ chop
s
3.Ch icken piec
es
COM PU DEF
ROS T
TO ADJU ST
QUAN TITY
- TOUC H PAD
AGAI N
SNA CKS
POP COR
N
BEV ERA GE
COO KING
BAK ED
POT ATO ES
FRE SH
VEG ETA BLE
S
REH EATI NG
DIN NER
PLA TE
ROL LES &
MUF FINS
1
2
3
4
5
6
7
8
9
In the interest of user-safety the oven should be restored to its original
POW ER
LEV EL
0
TIM ER
CLO CK
STO P
STA RT
CLE AR
condition and only parts identical to those specified should be used.
MINU TE PLUS
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-220DW
R-230DK
R-230DW
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-220DW
R-230DK
R-230DW
S1004R220DPW/
Page
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Summary of Contents for Sharp R-220DW
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Page 1: Table Of Contents
R-220DW R-230DK R-230DW SERVICE MANUAL S1004R220DPW/ MICROWAVE OVEN R-220DW MODELS R-230DK R-230DW DEF. LBS. QTY. CHECK 1. Grou nd mea 2.Ste aks/ chop 3.Ch icken piec COM PU DEF ROS T TO ADJU ST QUAN TITY - TOUC H PAD... -
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-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW 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... -
Page 5: Foreword And Warning
MICROWAVE OVEN R-220DW/ R-230DK/ R-230DW 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-220DW, R-230DK, R-230DW. It is recommended that service personnel carefully study the entire... -
Page 6: Product Specifications
P-20 ............ approx. 20% of FULL Power P-10 ............ approx. 10% of FULL Power P-0 ........No power throughout the cooking time EXPRESS DEFROST pad [R-220DW], COMPU DEFROST pad [R-230DK/W] MINUTE PLUS pad [R-220DW], START/MINUTE PLUS pad [R-230DK/W] Instant Start pads... -
Page 7: Oven Diagram
R-220DW R-230DK R-230DW Electrical Requirements The electrical requirements are a 115 -120 volt 60 Hz, AC only, Grounded 3-Pronged Plug 15 or 20 amp. fused electrical supply. It is recommended that a separate Receptacle Box circuit serving only this appliance be provided. When installing this appliance, observe all applicable codes and ordinances. -
Page 8: Operation
R-220DW R - 2 3 0 D K R-230DW 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. so that it will function in the following sequence. - Page 9 R-220DW R-230DK R-230DW SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY C/T FUSE MAGNETRON THERMAL CUT-OUT COM. POWER TRANSFORMER N.O. (RY-2) (RY-1) PRIMARY INTERLOCK RELAY CAPACITOR CONTROL UNIT 0.86 F 120V AC 60 Hz DOOR...
- Page 10 R-220DW R - 2 3 0 D K R-230DW 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-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW 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 DEFECTIVE PARTS... - Page 13 R-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW 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.
- Page 15 R-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER BLOWN C/T FUSE 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.
- Page 17 R-220DW R-230DK R-230DW 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-220DW) (1) Place one cup of water in the center of the turntable tray in the oven cavity. (2) Close the door, touch the " EXPRESS DEFROST " pad once.
- Page 19 R-220DW R-230DK R-230DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER (3) The oven is in Compu Defrost cooking condition. (4) The oven will operate as follows. WEIGHT 1ST STAGE 2ND STAGE 3RD STAGE LEVEL TIME LEVEL TIME LEVEL TIME 0.5lb 1min.5sec.
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Page 20: Touch Control Panel
R-220DW R - 2 3 0 D K R-230DW TEST PROCEDURES PROCEDURE COMPONENT TEST LETTER 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. -
Page 21: Description Of Lsi
R-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW 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. When either G8 line on key matrix is touched, a corresponding signal will be input into K00.
- Page 23 R-220DW R-230DK R-230DW 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-220DW R-230DK R-230DW 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.
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Page 26: Control Panel Assembly Removal
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. -
Page 27: Pictorial Diagram
R-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW 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. Then pull out the switch while pushing the plunger of the chapter "Pictorial Diagram".
- Page 29 R-220DW R-230DK R-230DW 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-220DW R - 2 3 0 D K R-230DW...
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Page 31: Control Panel Circuit
R-220DW R-230DK R-230DW SEG13 COM1 SEG14 COM0 SEG15 SEG16 SEG17 SEG18 SEG19 330p/50v 330p/50v /25v 330p/50v 0.01 330p/50v 100k 20kF 100k HZ4C3 100k 100k /25v 0.01 /25v 0.01 /25v 0.01 /25v 4.7k /16v /35v /50v /25v 1/4w 3.3k PKM22EPT (J1) - Page 32 R-220DW R - 2 3 0 D K R-230DW SEG13 COM1 SEG14 COM0 SEG15 SEG16 SEG17 SEG18 SEG19 330p/50v 330p/50v /25v 330p/50v 0.01 330p/50v 100k 20kF 100k HZ4C3 100k 100k /25v 0.01 /25v 0.01 /25v 0.01 /25v 4.7k /16v /35v...
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Page 33: Parts List
Control unit [R-230DK] 3- 1 DPWBFC028WRUZ Control unit [R-230DW] 3- 2 FPNLCB477WRKZ Control panel frame with key unit and LCD [R-220DW] 3- 2 FPNLCB481WRKZ Control panel frame with key unit and LCD [R-230DW] 3- 2 FPNLCB482WRKZ Control panel frame with key unit and LCD [R-230DK]... -
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: Oven And Cabinet Parts
R-220DW R-230DK R-230DW OVEN AND CABINET PARTS 7-10 7-10 4-17 6-10 4-14 6-10 4-14 6-11 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. 2000 SHARP CORP. (3S2.530E) Printed in U.S.A...