Sharp R-220FW Service Manual

Sharp R-220FW Manual

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  • Sharp R-220FW | Service Manual - Page 1
    ENERGY INSIDE FRONT COVER 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
  • Sharp R-220FW | Service Manual - Page 2
    to the owner. BEFORE SERVICING 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
  • Sharp R-220FW | Service Manual - Page 3
    R-220FW WARNING TO SERVICE PERSONNEL Microwave ovens the Service Manual carefully and follow all instructions. Don't Touch ! Danger High Voltage Before Servicing 1. chassis with the use of an insulated screwdriver. Whenever troubleshooting is performed the power supply must be disconnected.
  • Sharp R-220FW | Service Manual - Page 4
    sure that the actual instrument is operating normally as specified in its instruction booklet. Important: Survey instruments that comply with the requirement for instrumentation as prescribed by the performance standard for microwave ovens, 21 CFR 1030.10(c)(3)(i), must be used for testing. 2) Place
  • Sharp R-220FW | Service Manual - Page 5
    SERVICE MANUAL MICROWAVE OVEN R-214FW/ R-220FW FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-214FW and R-220FW. It is recommended that service personnel carefully study the entire
  • Sharp R-220FW | Service Manual - Page 6
    220FW Clock (1:00 - 12:59) Timer (0 - 99 minutes 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI Full power throughout the cooking time CFR, Title 21, Chapter 1, Subchapter J GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug. It
  • Sharp R-220FW | Service Manual - Page 7
    R-214FW R-220FW Electrical Requirements The electrical requirements are a 115 -120 volt 60 Hz, seals and sealing surfaces 4 8 12 6 Turntable motor shaft 7 Removable turntable support 7 Carefully place the turntable support in the center 1 of the oven floor. 8 Removable turntable 32 6 11
  • Sharp R-220FW | Service Manual - Page 8
    R-214FW R-220FW OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a sec. 26 sec. 32 sec. Note: The ON/OFF time ratio does not correspond with the percentage of microwave power, because approx. 3 seconds are needed for heating of the magnetron filament. POWER OUTPUT REDUCTION If the
  • Sharp R-220FW | Service Manual - Page 9
    SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY R-214FW R-220FW NOTE: " " indicates components with potentials above 250V. C/T FUSE TEMPERATURE FUSE (OVEN) N.O. COM. POWER TRANSFORMER (RY-1) (RY-2) A3 PRIMARY INTERLOCK RELAY 120V AC 60 Hz GRN
  • Sharp R-220FW | Service Manual - Page 10
    R-214FW R-220FW DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened magnetron. If an over heated condition develops in the magnetron due to cooling fan failure, obstructed air guide, dirty or blocked air intake, etc., the C/T fuse will open. Under normal operation, the C/T
  • Sharp R-220FW | Service Manual - Page 11
    GUIDE R-214FW R-220FW 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
  • Sharp R-220FW | Service Manual - Page 12
    R-214FW R-220FW TEST PROCEDURE CK = Check / RE = Replace RE CK A B C D E F F G H RE RE CK I/K CK RELAY WRONG OPERATION LOW VOLTAGE DIRTY OVEN CAVITY KEY UNIT FOIL PATTERN ON PWB. DEFROST CONDITION PROBLEM Home fuse blows when power cord is plugged into wall receptacle. C/T fuse blows when power
  • Sharp R-220FW | Service Manual - Page 13
    R-214FW R-220FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. To test for a shorted is installed. 9. Run the oven and check all functions. MICROWAVE OUTPUT POWER The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer case fitted).
  • Sharp R-220FW | Service Manual - Page 14
    R-214FW R-220FW TEST PROCEDURES PROCEDURE LETTER C HIGH VOLTAGE RECTIFIER TEST COMPONENT TEST 1. air flow through the vent holes of the oven cavity, especially the cooling fan and air guide. 5. Reconnect all leads removed from components during testing. 6. Reinstall the outer case (cabinet).
  • Sharp R-220FW | Service Manual - Page 15
    R-214FW R-220FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 8. Run the oven and check all functions. PRIMARY INTERLOCK SYSTEM TEST DOOR SENSING SWITCH 1. Disconnect the power supply cord,
  • Sharp R-220FW | Service Manual - Page 16
    220FW magnetron, especially the cooling fa air guide. CAUTION: IF THE C/T FUSE microwave ovens, proper maintenance cannot be performed with only a voltmeter and ohmmeter. In this service manual, the touch control panel assembly is divided into two units, Control Unit and Key Unit, and troubleshooting
  • Sharp R-220FW | Service Manual - Page 17
    R-214FW R-220FW TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 4) Replace the key unit. 5) group of indicators do not light up. g) The figure of all digits flicker. 2-3 Other possible problems caused by defective control unit. a) Buzzer does not sound or continues to sound. b) Clock does not
  • Sharp R-220FW | Service Manual - Page 18
    R-214FW R-220FW TEST PROCEDURES PROCEDURE LETTER K voltage Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated Defective relay. DC. voltage not high voltage capacitor. 4) Follow the troubleshooting guide given below for repair. 16
  • Sharp R-220FW | Service Manual - Page 19
    PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST R-214FW R-220FW STEPS 1 2 OCCURRENCE Only pattern at "a" is broken. case is installed. 9) Run the oven and check all functions. 2. Follow the troubleshooting guide given below, if indicator does not light up after above check and repairs are
  • Sharp R-220FW | Service Manual - Page 20
    R-214FW R-220FW 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
  • Sharp R-220FW | Service Manual - Page 21
    R-214FW R-220FW DESCRIPTION OF LSI The I/O signal of the LSI are detailed in the following table. Pin No. Signal 1 RESET 2 TEST 3 VSS 4 OCS3 5 OCS4 6 VD1 7 VDD 8 9 10
  • Sharp R-220FW | Service Manual - Page 22
    R-214FW R-220FW Pin No. Signal 25 K01 26 K02 27 K03 I/O Description IN Signal similar to K02. When either G9 line on key matrix is touched, a corresponding
  • Sharp R-220FW | Service Manual - Page 23
    R-214FW R-220FW SERVICING 1. Precautions for Handling Electronic Components This unit uses CMOS LSI power supply of the oven : CAUTION: THE HIGH VOLTAGE TRANSFORMER OF THE MICROWAVE OVEN IS STILL LIVE DURING SERVICING AND PRESENTS A HAZARD . Therefore, before checking the performance of the touch
  • Sharp R-220FW | Service Manual - Page 24
    220FW COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING AGAINST HIGH VOLTAGE: Microwave microwave energy. Please follow the instructions RF gasket (Magnetron). 2. If the wave guide or oven cavity are not intact. 3. If Sharp edge: Bottom plate, Oven cavity, Waveguide flange, Chassis support
  • Sharp R-220FW | Service Manual - Page 25
    R-214FW R-220FW to free it from retaining clips on the cavity face plate. 6. Lift entire outer case from the unit. CAUTION: 1. DISCONNECT OVEN FROM POWER SUP- PLY
  • Sharp R-220FW | Service Manual - Page 26
    R-214FW R-220FW CONTROL PANEL ASSEMBLY REMOVAL 1. Disconnect the power supply cord and remove outer case. TURNTABLE MOTOR REMOVAL Removal 1. Disconnect the power supply cord. 2. Remove the turntable and turntable support from the oven cavity. 3. Turn the oven over. 4. Remove the one (1) screw
  • Sharp R-220FW | Service Manual - Page 27
    R-214FW R-220FW 3. Re-connect the wire leads to the turntable motor. 4. Insert the fan blade to the fan motor shaft according to the following procedure. 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
  • Sharp R-220FW | Service Manual - Page 28
    R-214FW R-220FW Re-install 1. Re-install each switch in its place. The warp the slit choke (tabs on the door 14.Now, latch head and latch spring are free. panel assembly) to prevent microwave leakage. 15.Remove door screen from door frame. 8 Choke Cover 7 6 9 10 11 16.Now, door screen is
  • Sharp R-220FW | Service Manual - Page 29
    6. Re-install choke cover to door panel by pushing. Note: After any service to the door; (A) Make sure that door sensing switch, secondary interlock switch themselves, indicate a leakage of microwave energy from oven cavity. Pin Upper Oven Hinge R-214FW R-220FW Slit Choke Door Panel Lower Oven
  • Sharp R-220FW | Service Manual - Page 30
    "N" mark on the power supply cord. RED BLK C/T FUSE HIGH VOLTAGE COMPONENTS ORG GRY MAGNETRON (RED) H.V. RECTIFIER (RED) HIGH VOLTAGE CAPACITOR (WHT) POWER TRANSFORMER A A 6 5 4 3 2 1 R-214FW R-220FW
  • Sharp R-220FW | Service Manual - Page 31
    R77 220k R78 220k Figure S-2. Control Panel Circuit G 1 G 2 G 3 G 7 6 2 G 8 3 5 G 9 TIMER CLOCK 0 G10 9 8 KEY UNIT G 4 G 5 G 6 COOK MINUTE PULS 4 POPCORN POWER LEVEL 1 DEFROST STOP CLEAR 7 REHEAT START 6 6 R-214FW R-220FW A B C D E F G H
  • Sharp R-220FW | Service Manual - Page 32
    R-214FW R-220FW 1 A B C D E F G H 1 2 3 4 5 DIP CN-B UNIT CODE CHIP SIDE Q22 E B D40 5 D22 C8 Board 2 3 4 5 C2 Q21 E 6 A B C D E F G H 6 PARTS LIST Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO
  • Sharp R-220FW | Service Manual - Page 33
    key unit [R-220FW] Graphic sheet [R-214FW] Graphic sheet [R-220FW] Membrane switch Turntable support Monitor caution DHHS caution label Instruction book for pre-production [R-220FW] Instruction book 4. DESCRIPTION Order Parts from the authorized SHARP parts Distributor for your area. Defective parts
  • Sharp R-220FW | Service Manual - Page 34
    R-214FW R-220FW 1 2 OVEN AND CABINET PARTS A 2-1 3 4 5 7-10 7-3 7-10 7-10 6 A B C D E 4-5 F 4-8 6-1 G 6-2 H B 7-3 4-9 1-10 1-8 7-6 7-9 7-10 4-3 C 7-7 7-9 7-10 7-2 6-4 1-2 4-12 7-10 1-7 4-4 1-6 D 6-3 7-8 4-11 1-3 4-9 7-5 E 7-10 1-11 7-2 7-11 F 2-2 4-10 4-1
  • Sharp R-220FW | Service Manual - Page 35
    Before attaching Control unit to Control panel, foil side of Control unit must be cleaned by ethyl-alcohol. 3-7 3-5 3-4 3-6 DOOR PARTS 5-7 5-6 R-214FW R-220FW 6 A B C D E F F MISCELLANEOUS 6-6 5-5 5-4 G G Actual wire harness may be different than illustration. H H 1 2 3 4 5 6 33
  • Sharp R-220FW | Service Manual - Page 36
    R-214FW R-220FW 1 2 A PACKING AND ACCESSORIES B C D E INTO THE OVEN CAVITY F 3 4 DOOR PROTECTION SHEET SPADPA580WRE0 6-5 INSTRUCTION BOOK 6-1 TURNTABLE TRAY MICROWAVE OVEN 6-2 TURNRTABLE SUPPORT 5 6 TOP PAD ASSEMBLY A FPADBA454WRKZ B POLYETHYLENG BAG SSAKHA014WRE0 C D BOTTOM PAD
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R-214FW
R-220FW
MICROWAVE OVEN
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
Page
PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO
AVOID POSSIBLE
EXPOSURE TO EXCESSIVE MICROWAVE ENERGY
...................
INSIDE FRONT COVER
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
PRINTED WIRING BOARD
.................................................................................................................................
29
PARTS LIST
........................................................................................................................................................
30
PACKING AND ACCESSORIES
.........................................................................................................................
34
S3208R220FPW/
R-214FW
R-220FW
MODELS
SERVICE MANUAL
SHARP CORPORATION
This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
R-220FW