Sharp R-21JVF Service Manual

Sharp R-21JVF Manual

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  • Sharp R-21JVF | 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-21JVF | 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-21JVF | Service Manual - Page 3
    R-21JV-F 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-21JVF | Service Manual - Page 4
    R-21HT-F R-21JV-F 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
  • Sharp R-21JVF | Service Manual - Page 5
    SERVICE MANUAL LIGHT DUTY COMMERCIAL MICROWAVE OVEN R-21HT-F/ R-21JV-F FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVENS, R-21HT-F and R-21JV-F. It is recommended that service personnel
  • Sharp R-21JVF | Service Manual - Page 6
    R-21JV less. Touch Control System Timer (0 - 99 min. 99 seconds) Microwave Power for Variable Cooking Repetition Rate; P-HI Full power throughout the cooking , Chapter 1, Subchapter J, NSF certified GENERAL INFORMATION GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug
  • Sharp R-21JVF | Service Manual - Page 7
    R-21HT-F R-21JV-F Electrical Requirements The electrical requirements are a 120 volt 60 Hz, AC only, 15 amp. or more protected electrical supply. It is setting memory 10. CHECK pad for checking memory 11. SIGNAL pad for setting signal sound 5 7 9 10 R-21HT-F 5 6 85 11 9 10 6 8 11 R-21JV-F
  • Sharp R-21JVF | Service Manual - Page 8
    R-21HT-F R-21JV-F OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of the cooking time, the power transformer, oven lamp, etc. are turned off, and the generation of microwave energy is stopped. The oven will revert to the OFF condition. 6. When the door is opened during
  • Sharp R-21JVF | Service Manual - Page 9
    CUT-OUT 125˚C (OVEN) 145˚C (MAG.) A7 A3 POWER TRANSFORMER R-21HT-F R-21JV-F LINE BYPASS CAPACITOR 0.003300 F / AC 125V NOISE SUPPRESSION COIL LINE CROSS CAPACITOR 0.22 MOTOR MOTOR SECONDARY INTERLOCK SWITCH Figure O-2 Oven Schematic-Microwave cooking Condition CAPACITOR 0.94 µF 2400V 7
  • Sharp R-21JVF | Service Manual - Page 10
    R-21HT-F R-21JV-F DESCRIPTION AND FUNCTION OF COMPONENTS DOOR OPEN MECHANISM The door is opened by grasping the door handle, refer to Figure D-1. When the door handle is
  • Sharp R-21JVF | Service Manual - Page 11
    -F R-21JV-F 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
  • Sharp R-21JVF | Service Manual - Page 12
    R-21HT-F R-21JV-F TEST PROCEDURE CK = Check / RE = Replace A B C D E F F G H J K L M CK RE RE RE WRONG OPERATION LOW VOLTAGE DIRTY OVEN CAVITY NOISE FILTER POSSIBLE CASE AND DEFECTIVE PARTS CONDITION PROBLEM Home fuse or circuit breaker blows when power cord is plugged into wall outlet. OFF
  • Sharp R-21JVF | Service Manual - Page 13
    R-21HT-F R-21JV-F PROCEDURE LETTER A TEST PROCEDURES COMPONENT TEST MAGNETRON ASSEMBLY TEST 1. 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-21JVF | Service Manual - Page 14
    R-21HT-F R-21JV-F PROCEDURE LETTER C TEST PROCEDURES COMPONENT TEST HIGH VOLTAGE RECTIFIER 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-21JVF | Service Manual - Page 15
    R-21HT-F R-21JV-F PROCEDURE LETTER F TEST PROCEDURES COMPONENT TEST SECONDARY INTERLOCK SWITCH TEST 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block
  • Sharp R-21JVF | Service Manual - Page 16
    R-21HT-F R-21JV-F PROCEDURE LETTER H TEST PROCEDURES COMPONENT TEST BLOWN 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-21JVF | Service Manual - Page 17
    R-21HT-F R-21JV-F PROCEDURE LETTER TEST PROCEDURES COMPONENT TEST 1. Key Unit. NOTE ; 1) certain 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-21JVF | Service Manual - Page 18
    START SET 8 SELECTA EXPRESS STOP/ TIME DEFROST CLEAR CHECK 9 5 3 1 SIGNAL G12 0 6 4 2 R-21JV-F G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G 9 G10 G11 G12 voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated Defective relay. DC.
  • Sharp R-21JVF | Service Manual - Page 19
    R-21HT-F R-21JV-F PROCEDURE LETTER M TEST PROCEDURES COMPONENT TEST FOIL PATTERN ON THE the outer 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 finished. 1) Disconnect
  • Sharp R-21JVF | Service Manual - Page 20
    R-21HT-F R-21JV-F 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-21JVF | Service Manual - Page 21
    R-21HT-F R-21JV-F DESCRIPTION OF LSI LSI The I/O signal of the LSI is detailed in the following table. Pin No. Signal I/O 1 VCC IN Description Power source voltage: +5V.
  • Sharp R-21JVF | Service Manual - Page 22
    R-21HT-F R-21JV-F Pin No. Signal I/O 22-24 P44-P42 OUT Digit selection signal. Description Signal similar to P45. 25 INT1 IN Signal synchronized with commercial power source
  • Sharp R-21JVF | Service Manual - Page 23
    Pin No. 61 Signal P33 I/O OUT 62 P32 OUT 63 P31 OUT 64 P30 OUT R-21HT-F R-21JV-F Description Key strobe signal. Signal applied to touch-key section. A pulse signal is input to P27, P26, P25 and P24 terminals while one of G5
  • Sharp R-21JVF | Service Manual - Page 24
    R-21HT-F R-21JV-F TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components This unit 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
  • Sharp R-21JVF | Service Manual - Page 25
    PRECAUTIONS FOR USING LEAD-FREE SOLDER R-21HT-F R-21JV-F 1. Employing lead-free solder The "Main PWB" of this model employs lead-free solder. This is indicated by the "LF" symbol printed on the PWB and in the service manual. The suffix letter indicates the alloy type of the solder. Example: Sn-Ag
  • Sharp R-21JVF | Service Manual - Page 26
    R-21HT-F R-21JV-F 3) Practice for inputting total using times (Ex. 310000 times). ... Flashing / ... 0.1sec BUZZER PAD (Door close) CHECK CHECK #2 SIGNAL SIGNAL DOUBLE QUANTITY DISPLAY . . . 82 68 (user total count) INDICATOR PHONE CHECK No. CHECK 34 56 (service total count upper figure) 3456XX
  • Sharp R-21JVF | Service Manual - Page 27
    100 set) CHECK . NOTE: 1 : To input using times of other memory, touch necessary Memory key at above step #A. 2 : To input using times of manual cooking, touch SELECTATIME key at above step #A. 3 : To input using times of Express Defrost, touch EXPRESS DEFROST key at above step #A. 25 R-21HT
  • Sharp R-21JVF | Service Manual - Page 28
    21JV-F 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-21JVF | Service Manual - Page 29
    R-21HT-F R-21JV-F HIGH VOLTAGE RECTIFIER ASSEMBLY AND HIGH VOLTAGE CAPACITOR REMOVAL To insertion plate A. 7. Remove the one (1) screw holding the chassis support to the magnetron. 8. Release the tabs of air intake duct from the chassis support and the oven cavity. 9. Move the air intake duct to
  • Sharp R-21JVF | Service Manual - Page 30
    R-21HT-F R-21JV-F POSITIVE LOCK® CONNECTOR (NO-CASE TYPE) REMOVAL 1. Disconnect the power supply 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. Install the fan blade to the shaft of
  • Sharp R-21JVF | Service Manual - Page 31
    R-21HT-F R-21JV-F POWER SUPPLY CORD REPLACEMENT Removal 1. Disconnect the power supply cord Plate Power Supply Cord Screw Green Wire Black Wire RED White Wire L WHT N Noise Filter Chassis Support 7. Now, the power supply cord is free. Re-install 1. Insert the moulding cord stopper of
  • Sharp R-21JVF | Service Manual - Page 32
    R-21JV warp the slit choke (tabs on the door panel assembly) to prevent microwave leakage. Choke Cover Putty Knife Door Frame Figure C-6. Door Disassembly 7. Release install choke cover to door panel by pushing. NOTE: After any service to the door; (A) Make sure that door sensing switch and secondary
  • Sharp R-21JVF | Service Manual - Page 33
    with proper microwave radiation emission limitation standards. (Refer to Microwave Measurement Procedure.) After any service, make sure Hinge Slit Chok Choke Cover Lower Oven Pin Hinge R-21HT-F R-21JV-F Figure C-7. Door Replacement ANTENNA MOTOR SHAFT REPLACEMENT REMOVAL 1. Disconnect
  • Sharp R-21JVF | Service Manual - Page 34
    R-21HT-F R-21JV-F To left wall of Flat face oven cavity Antenna motor shaft Antenna holder Hole To right wall of not caught between the oven door and the oven cavity front plate, to avoid possible exposure to excessive microwave energy. Oven Cavity Rear Edge Push Front Edge Ceramic Shelf 32
  • Sharp R-21JVF | Service Manual - Page 35
    FILTER BLU BRN THERMAL CUT-OUT 145°C(MAG.) WHT ORG ORG FAN MOTOR HIGH VOLTAGE COMPONENTS MAGNETRON H.V. RECTIFIER WHT WHT RED POWER TRANSFORMER H.V. CAPACITOR A A 6 5 4 3 2 1 R-21HT-F R-21JV-F
  • Sharp R-21JVF | Service Manual - Page 36
    R-21HT-F R-21JV-F A B C D E F G H 1 1 2 2 3 3 C3 47µ/10v C4 0.1µ/50v (J1) VRS1 10G471K A3 A5 AC120V 60Hz d T1 1N4002 x 4 D1 D2 + - D3 D4 C1 2200µ/25v C2 0.1µ/50v Q1 KIA7805PI + -
  • Sharp R-21JVF | Service Manual - Page 37
    4.7k R85 4.7k R84 4.7k G4 G5 G6 G7 G8 7 DOUBLE QUANTITY START SET 8 SELECTA EXPRESS STOP/ TIME DEFROST CLEAR CHECK 9 5 3 1 SIGNAL 0 6 4 2 NOTE : 35 4 4 5 5 6 6 R-21HT-F R-21JV-F Figure S-2b. Control Panel Circuit for
  • Sharp R-21JVF | Service Manual - Page 38
    R-21HT-F R-21JV-F 1 A B C D E F G H 1 2 3 4 5 1 13 DIP F R30 R33 R32 8 R31 5 1 IC2 4 CERTAIN PART IS INTENTIONALLY NOT GROUNDED AND MAY PRESENT A RISK OF ELECTRICAL SHOCK DURING SERVICING. SERVICE PERSONNEL - DO NOT CONTACT THE FOLLOWING PARTS WHILE THE APPLIANCE IS ENERGIZED ; TRANSFORMER
  • Sharp R-21JVF | Service Manual - Page 39
    R-21HT-F R-21JV-F 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. DESCRIPTION Q'TY 1- 1 1- 2 1- 3 1- 4 * 1- 5 * 1- 6 1- 7 1- 8 1- 9 1-10 1-10 1-11 1-12 1-13 * 1-14 ∆* 1-15 2- 1 2- 1 2- 2 2- 3
  • Sharp R-21JVF | Service Manual - Page 40
    panel frame with key unit [R-21JV-F] Key unit [R-21HT-F] Key unit [R-21JV-F] C/P case Display window [R-21JV-F] [R-21HT-F] User caution label assembly Steam guide HV capacitor holder Fan blade Fan duct Stirrer antenna assembly Insertion cushion Insertion plate A VCP cap Chassis support Antenna
  • Sharp R-21JVF | Service Manual - Page 41
    badge [R-21JV-F] Door badge [R-21HT-F] MISCELLANEOUS Instruction book x 8mm Screw : 4mm x 12mm Screw : 4mm x 8mm [R-21HT-F] Screw : 4mm x 8mm [R-21JV-F] Screw : 4mm x 10mm R-21HT-F R-21JV-F Q'TY 2 1 1 1 2 1 1 1 4 2 1 1 1 1 1 CODE AL Order Parts from the authorized SHARP parts Distributor for your
  • Sharp R-21JVF | Service Manual - Page 42
    R-21HT-F R-21JV-F 1 2-1 A 2 7-3 3 4 5 OVEN AND CABINET PARTS 7-3 7-3 1-10 1-9 4-28 7-13 6 A B 6-8 7-6 4-34 C 4-14 D 4-21 4-40 4-23 4-24 4-27 4-19 4-2 4-20 7-3 4-9 6-6 B 4-10 4-26 4-25 7-12 7-1 1-4 1-13 6-4 7-13 4-26 4-32 6-5 6-3 4-15 7-7 7-
  • Sharp R-21JVF | Service Manual - Page 43
    1 2 3 3-1 CONTROL PANEL PARTS A 3-2 3-2-3 B 3-2-2 4 5 3-4 3-4 3-4 3-4 R-21HT-F R-21JV-F 6 A B 3-3 C DOOR PARTS C 3-2-1 5-2 5-1-15 5-1-16 5-1-14 D 5-1 5-1-2 D 5-1-12 5-1-16 E 5-1-4 F 5-3 5-1-5 G 5-1-6 5-1-10 5-1-18 5-1-4-2 5-1-16 5-1-4-4 5-1-4-5 x4 5-1-13 E
  • Sharp R-21JVF | Service Manual - Page 44
    6-1 INSTRUCTION BOOK InOtovethneCavity Not Replaceable Items. TOP PAD ASSEMBLY (FPADBA385WRK0) WRAP COVER (SSAKHA034WRE0) DOOR PROTECTION SHEET (SPADPA204WRE0) BOTTOM PAD ASSEMBLY (FPADBA386WRK0) PACKING CASE SPAKCD113WRE0 [R-21HT-F] SPAKCD239WRE0 [R-21JV-F] COPYRIGHT © 2005 BY SHARP CORPORATION
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R-21HT-F
R-21JV-F
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 contain
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 Rectifier 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
................................................................
26
PICTORIAL DIAGRAM
........................................................................................................................................
33
CONTROL PANEL
CIRCUIT
..............................................................................................................................
34
PRINTED WIRING BOARD
.................................................................................................................................
36
PARTS LIST
........................................................................................................................................................
37
PACKING AND ACCESSORIES
.........................................................................................................................
42
S0515R21HTPF/
R-21HT-F
R-21JV-F
LIGHT DUTY
COMMERCIAL
MICROWAVE OVENS
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.
1000W/ R-21JV
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CHECK
R-21JV-F