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Sharp R-2197 Service Manual

Microwave oven r-2197
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See also: Operating Manual
1000 W/ R-219 7
CAUTION, MICROWAVE RADIATION ............................................................................................................. 1
WARNING .......................................................................................................................................................... 1
PRODUCT SPECIFICATIONS ......................................................................................................................... 2
GENERAL INFORMATION ................................................................................................................................ 2
APPEARANCE VIEW ....................................................................................................................................... 3
OPERATION SEQUENCE ................................................................................................................................ 4
FUNCTION OF IMPORTANT COMPONENTS ................................................................................................ 5
SERVICING ...................................................................................................................................................... 6
TEST PROCEDURE ......................................................................................................................................... 8
TOUCH CONTROL PANEL ASSEMBLY ........................................................................................................ 14
COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE ........................................................... 21
MICROWAVE MEASUREMENT .................................................................................................................... 27
WIRING DIAGRAM ......................................................................................................................................... 28
PICTORIAL DIAGRAM ................................................................................................................................... 29
CONTROL PANEL CIRCUIT ........................................................................................................................... 30
PRINTED WIRING BOARD ............................................................................................................................. 31
PARTS LIST ................................................................................................................................................... 32
SERVICE MANUAL
ON
DEF
NO. X2 CHECK
MODEL
In interests of user-safety the oven should be restored to its
original condition and only parts identical to those specified
should be used.

TABLE OF CONTENTS

SHARP CORPORATION
MICROWAVE OVEN
R-2197
R-2197
S9811R2197PJ/
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Summary of Contents for Sharp R-2197

  • Page 1: Table Of Contents

    R-2197 SERVICE MANUAL S9811R2197PJ/ MICROWAVE OVEN 1000 W/ R-219 7 NO. X2 CHECK R-2197 MODEL In interests of user-safety the oven should be restored to its original condition and only parts identical to those specified should be used. TABLE OF CONTENTS Page CAUTION, MICROWAVE RADIATION ......................
  • Page 2 R-2197...

  • Page 3: Caution Microwave Radiation

    MICROWAVE OVEN R-2197 APPEARANCE VIEW GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service OPERATING SEQUENCE engineers with Operation and Service Information. It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render satisfactory FUNCTION OF IMPORTANT customer service.

  • Page 4: General Information

    R-2197 PRODUCT DESCRIPTION SPECIFICATION ITEM DESCRIPTION Power Requirements 230 - 240 Volts 50 Hertz Single phase, 3 wire earthed Power Output 1000 W nominal of RF microwave energy (measured by method of IEC 705) Operating frequency 2450 MHz Case Dimensions...

  • Page 5: Appearance View

    R-2197 APPEARANCE VIEW OVEN 1. Oven light 2. Ceramic shelf 3. Control panel 4. Cavity face plate 5. Door latch openings 6. Door latches 7. Door hinges 8. Door seals and sealing surfaces 9. Door handle 10.Oven door with see-through window 11.Air ventilation cover and openings...

  • Page 6: Operation Sequence

    R-2197 OPERATION SEQUENCE OFF CONDITION first. After that the contacts (COM-NC) of the monitor switch can be closed. Closing the door activates the 1st. latch switch, 2nd. latch 6-2. When the oven door is closed, the contacts (COM- switch and stop switch.

  • Page 7: Function Of Important Components

    R-2197 FUNCTION OF IMPORTANT COMPONENTS DOOR OPEN MECHANISM HIGH VOLTAGE FUSE 0.75A The door is opened by grasping the door handle, refer to The high voltage fuse blows when the high voltage rectifier Figure D-1. or the magnetron is shorted.

  • Page 8: Servicing

    If the water remains cold carry out 3D checks and re-examine the Sharp recommend that wherever possible fault-finding is connections to the component being tested. carried out with the supply disconnected. It may in, some...

  • Page 9: Test Procedure

    R-2197 TEST PROCEDURE A B C D E E E E F G H I K L M M N CK RE RE RECK CK CKCK POSSIBLE CASE DEFECTIVE PARTS PROBLEM CONDITION Home fuse circuit breaker blows when power cord is plugged into wall outlet.
  • Page 10 R-2197 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST MAGNETRON TEST NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECKS. Isolate the magnetron from high voltage circuit by removing all leads connected to filament terminal.
  • Page 11 R-2197 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Initial temperature ....................T1 = 11 C Temperature after (42 + 2) = 44 sec ..............T2 = 21 C Temperature difference Cold-Warm ............... T1 = 10C Measured output power The equation is “P = 100 x T” ..........P = 100 x 10 C = 1000 Watts JUDGMENT: The measured output power should be at least 15 % of the rated output power.
  • Page 12 R-2197 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST it has been charged. D. A short-circuited capacitor shows continuity all the time. E. An open capacitor constantly shows a resistance about 10 M because of its internal 10M resistance. F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance.
  • Page 13 R-2197 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST NOISE FILTER TEST CARRY OUT 3D CHECKS. FUSE M10A DISCHARGE RESISTOR 680 k Disconnect the leads from the terminals of noise filter. Using an ohmmeter, check between the terminals as described in the following table.
  • Page 14 R-2197 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST e) Wrong figure appears. f) A certain group of indicators do not light up. g) The figure of all digits flicker. 2-3 Other possible troubles caused by defective control unit. a) Buzzer does not sound or continues to sound.
  • Page 15 R-2197 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST PROCEDURES TO BE TAKEN WHEN THE FOIL PATTERN ON THE PRINTED WIRING BOARD (PWB) IS OPEN To protect the electronic circuits, this model is provided with a fine foil pattern added to the input circuit on the PWB, this foil pattern acts as a fuse.

  • Page 16: Touch Control Panel Assembly

    R-2197 TOUCH CONTROL PANEL ASSEMBLY OUTLINE OF TOUCH CONTROL PANEL The touch control section consists of the following units as 11) Relay Driving Circuit shown in the touch control panel circuit. This is a circuit for driving output relay by IC1 output.
  • Page 17 R-2197 Pin No. Signal Description AN5-AN4 Terminal to change functions according to the model. Signal in accordance with the model in operation is applied to set up its function. 9-10 AN3-AN2 Terminal not used. Input signal which communicates the door open/close information to LSI.
  • Page 18 R-2197 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" level the moment power is supplied, at this time the LSI is reset. Thereafter set at "H"...
  • Page 19 R-2197 2-2 Memory IC (IC2) X24C02P is a 2K-bit, serial memory, enabling CMOS to be erased/written electrically. This memory is constructed with 256 registers x 8bits, enabling individual access, read and write operations to be performed. Details of input/output signal for IC2 are as shown in the following diagram.
  • Page 20 R-2197 TOUCH CONTROL PANEL SERVICING 1. Precautions for Handling Electronic Components transformer. This unit uses CMOS LSI in the integral part of the 4) Re-install the outer case (cabinet). circuits. When handling these parts, the following 5) Re-connect the power supply cord after the outer precautions should be strictly followed.
  • Page 21 R-2197 PROCEDURE FOR CHECKING/CLEARING 3) Practice for inputting total using times (Ex. 310000 times). SERVICE COUNTS OF MICROWAVE OVEN ... Flashing / ... 0.1sec BUZZER The following procedure enables the servicer to obtain the total using times (cook cycles) since the microwave oven...
  • Page 22 R-2197 5) Practice for cancelling total using times and total opera- DISPLAY PAUSE tion time (user and service) and all other counter. End of each stage ... Flashing / ... 0.1sec BUZZER After 10% of total cooking time is passed...

  • Page 23: Component Replacement And Adjustment Procedure

    Please refer to ‘OVEN PARTS, CABINET PARTS, CONTROL PANEL PARTS, DOOR PARTS’, when carrying out any of the following removal procedures: WARNING FOR WIRING and Oven cavity. To prevent an electric shock, take the following 3) Sharp edge: manners. 1. Before wiring, Bottom plate, Oven cavity, Waveguide flange, Chassis support and other metallic plate.
  • Page 24 R-2197 HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE FUSE AND HIGH VOLTAGE RECTIFIER ASSEMBLY REMOVAL 8. Now, the high voltage fuse is free. To remove the components, proceed as follows. 9. Remove one (1) screw holding the capacitor holder to 1. CARRY OUT 3D CHECKS.

  • Page 25: Fan Motor Replacement

    R-2197 POSITIVE LOCK ® CONNECTOR (NO-CASE TYPE) REMOVAL Terminal 1. CARRY OUT 3D CHECKS. Positive lock® 2. Push the lever of positive lock ® connector. connector ® 3. Pull down on the positive lock connector. Push CAUTION: WHEN CONNECTING THE POSITIVE ®...

  • Page 26: Pictorial Diagram

    R-2197 POWER SUPPLY CORD REPLACEMENT Removal Re-install 1. CARRY OUT 3D CHECKS. 1. Insert the moulding cord stopper of power supply cord 2. Remove the one (1) screw holding the green/yellow into the square hole of the oven cavity rear plate, wire to the cavity rear plate.
  • Page 27 R-2197 of the monitor switch is pressed with the door closed. 4. Secure the screws with washers firmly. 5. Check the operation of all switches. If each switch has Latch Head Handle not activated with the door closed, loosen screw and Lever adjust the latch hook position.

  • Page 28: Installation Of Ceramic Shelf

    R-2197 (B) An approved microwave survey meter should be used to assure compliance with proper micro- Upper wave radiation emission limitation standards. Oven Hinge (Refer to Microwave Measurement Procedure.) Upper Oven Hinge After any service, make sure of the following : 1.
  • Page 29 R-2197 MICROWAVE MEASUREMENT ing. After adjustment of door latch switches, monitor switch Recommended instruments are: and door are completed individually or collectively, the NARDA 8100 following leakage test must be performed with a survey NARDA 8200 instrument and it must be confirmed that the result meets...
  • Page 30 R-2197 SCHEMATIC NOTE: Indicates components with potential above 250 V. NOTE: CONDITION OF OVEN 1. DOOR CLOSED. APPEAR ON DISPLAY. THERMAL THERMAL CUT-OUT CUT-OUT NOISE FILTER 1ST. LATCH 125˚C (OVEN) 145˚C (MG) SWITCH 2ND. LATCH SWITCH Figure O-1 Oven Schematic-OFF Condition...
  • Page 31 R-2197 RECTIFIER H.V. EARTH CN-B CN-A CN-G RY2 RY3...
  • Page 32 R-2197 4.7k 0.01 SPECIFIED, 1SS270A SPECIFIED, 4.7k 1/4W SPECIFIED, NOTE 4.7k 4.7k 4.7k 4.7k HZ4A2 4.7k /50v /50v /10v 4.7k /50v /50v /25v /50v /25v 2200 /10v 10G471K VRS1 (J1)

  • Page 33: Printed Wiring Board

    R-2197 (C83) (C82) (C81) (C80) (R91) (R90) (JJ) (R89) (R66) (C64) (R69) (JH) (R65) (R68) (C60) (R60) (R62) (C101) (C60) (J5) (JG) (JD) (R61) (J6) (JE) (R64) (R63) (C63) (CN - H) (JA) (R1) (ZD1) (R2) (R101) (14) (15) (16)

  • Page 34: Parts List

    R-2197 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 CODE ELECTRIC PARTS 1- 1 QSW-MA086WRE0 Monitor switch 1- 2...
  • Page 35 R-2197 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 CODE VHEHZ4A2///-1 Zener diode (HZ4A2) 3- 2 FPNLCB403WRK0 Control panel frame with key unit...
  • Page 36 R-2197 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 CODE “SCREWS,NUTS AND WASHERS 7- 1 XHPSD40P08K00 Screw : 4mm x 8mm...

  • Page 37: Oven And Cabinet Parts

    R-2197 OVEN AND CABINET PARTS 1-10 4-23 7-13 4-10 7-13 7-13 4-26 4-21 7-12 1-13 4-26 4-17 4-27 4-28 1-17 4-14 7-10 1-18 4-15 7-10 4-25 7-11 1-12 4-18 7-10 4-22 4-13 4-20 4-19 1-15 1-11 7-14 4-12 4-29 4-11...
  • Page 38 R-2197 CONTROL PANEL PARTS 3-2-3 3-2-2 DOOR PARTS 3-2-1 5-15 5-17 5-21 5-16 5-13 5-16 5-20 5-16 5-13 5-4-2 5-4-4 5-4-1 5-4-3 5-4-4 5-16 5-12 5-14 5-19 5-12 5-18 5-11 5-19 MISCELLANEOUS 5-10 Actual wire harness may be different from illustration.

  • Page 39: Packing And Accessories

    R-2197 PACKING AND ACCESSORIES TOP PAD ASSEMBLY (FPADBA385WRK0) WRAP COVER (SSAKHA034WRE0) TRAY HOLDER DOOR PROTECTION SHEET (SPADFA435WRE0) (SPADPA204WRE0) MENU STICKER BOTTOM PAD ASSEMBLY (FPADBA386WRK0) INSTRUCTION BOOK PACKING CASE Not Replaceable Items. SPAKCD153WRE0...
  • Page 40 R-2197 '98SHARP CORP. (9S0.730E) Printed in Australia...

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