R402JWT SERVICE MANUAL S5601R402JPW/ MICROWAVE OVEN MODELS R-402JK-T R-402JW-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 contain circuitry capable of producing very high voltage and current, contact with following parts may result in a severe, possibly fatal, electrical shock.
CONTENTS PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY [9] [10] [11] BEFORE SERVICING CHAPTER 1. WARNING TO SERVICE PERSONNEL [1] Before Servicing .........................................1-1 [2] When the testing is completed, ..................1-1 [3] After repairing .............................................1-1 CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE [1] Requirements: ............................................
R402JWT R402JWT Service PRECAUTIONS TO BE OBSERVED BEFORE AND Manual DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with the door open.
R402JWT Service Manual CHAPTER 1. WARNING TO SERVICE PERSONNEL R402JWT 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. (Example) High Voltage Capacitor, High Voltage Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. Read the Service Manual carefully and follow all instructions.
R402JWT Service Manual CHAPTER 2. MICROWAVE MEASUREMENT PROCEDURE R402JWT [1] 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 acquisition by a purchaser, and thereafter (through the useful life of the oven), 5 mW/cm2 at any point 5cm or more from the external surface of the oven. 2.
R402JWT CHAPTER 3. FOREWORD AND WARNINGService R402JWT Manual [1] FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP MICROWAVE OVEN, R-402JK-T and R-402JW-T. It is recommended that service personnel carefully study the entire text of this manual so that they will be qualified to render satisfactory customer service. Check the interlock switches and the door seal carefully.
R402JWT CHAPTER 4. PRODUCT DESCRIPTION R402JWT Service Manual [1] SPECIFICATIONS ITEM Power Requirements Power Consumption Power Output Outside Dimensions Cooking Cavity Dimensions (1.4 Cubic feet) Control Complement Oven Cavity Light Safety Standard DESCRIPTION 120 Volts 60 Hertz Single phase, 3 wire grounded 1600W / Approx. 13.
R402JWT CHAPTER 5. GENERAL INFORMATION R402JWT Service Manual [1] GROUNDING INSTRUCTIONS This oven is equipped with a three prong grounding plug. It must be plugged into a wall receptacle that is properly installed and grounded in accordance with the National Electrical Code and local codes and ordinances. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current.
R402JWT 2. TOUCH CONTROL PANEL NOTE: Some one-touch cooking features such as “MINUTE PLUS” are disabled after three minutes when the oven is not in use. These features are automatically enabled when the door is opened and closed or the STOP/ CLEAR pad is pressed.
R402JWT CHAPTER 6. OPERATION R402JWT Service Manual [1] DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. 1. OFF CONDITION 3. POWER LEVEL P-0 TO P-90 COOKING Closing the door activates the door sensing switch and primary interlock switch. (In this condition, the monitor switch contacts are opened.) When Variable Cooking Power is programmed, the 120 volts A.C.
R402JWT [2] OVEN SCHEMATIC 1. Off Condition SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED 2. CLOCK APPEARS ON DISPLAY "TO LOAD" B2 DOOR SENSING SWITCH POWER TRANSFORMER B1 GRN GND " indicates components with potentials above 250V (RY2) SECONDARY INTERLOCK RELAY C2 C1 MAGNETRON H 120VAC 60Hz NOTE: " MAGNETRON TEMPERATURE FUSE MONITOR FUSE (20A) BLK "TO SOURCE" OVEN THERMAL CUT-OUT C3 N CONTROL UNIT (RY1) HIGH VOLTAGE CAPACITOR 0.
R402JWT [3] DESCRIPTION AND FUNCTION OF COMPONENTS 1. DOOR OPEN MECHANISM 4. TURNTABLE MOTOR The door is opened by pushing the open button on the control panel, refer to the Figure D-1. When the open button is pushed, the open button pushes up the switch lever, and then the switch lever pushes up the latch head. The latch heads are moved upward and released from latch hook. Now the door will open.
R402JWT CHAPTER 7. TROUBLESHOOTING GUIDEService R402JWT Manual 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. These tests are given a procedure letter which will be found in the "Test Procedure "section.
R402JWT CHAPTER 8. TEST PROCEDURES R402JWT Service Manual [1] Procedure A: MAGNETRON ASSEMBLY 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. 4. To test for an open filament, isolate the magnetron from the high voltage circuit. A continuity check across the magnetron filament leads should indicate less than 1 ohm. 5.
R402JWT 5. Reconnect all leads removed from components during testing. 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. NOTE: Be sure to use an ohmmeter that will supply a forward bias voltage of more than 6.3 volts. [4] Procedure D: HIGH VOLTAGE CAPACITOR 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. 4.
R402JWT [7] Procedure F: SECONDARY INTERLOCK SYSTEM TEST 1. DOOR SENSING SWITCH 1. Disconnect the power supply cord, and then remove outer case. 2. Open the door and block it open. 3. Discharge high voltage capacitor. 4. Isolate the switch and connect the ohmmeter to the common (COM.) and normally open (NO) terminal of the switch. The meter should indicate an open circuit with the door open and a closed circuit with the door closed. If improper operation is indicated, replace the door sensing switch. 5.
R402JWT 3. Discharge high voltage capacitor. 4. If the monitor fuse is blown when the door is opened, check the primary interlock switch, secondary interlock relay (RY2), relay (RY1) and monitor switch according to the “TEST PROCEDURE” for those switches before replacing the blown monitor fuse. CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE, TEST THE PRIMARY INTERLOCK SWITCH, SECONDARY INTERLOCK RELAY, DOOR SENSING SWITCH AND MONITOR SWITCH FOR PROPER OPERATION.
R402JWT b) When touching the pads, no pads produce a signal. 2) In connection with indicators a) At a certain digit, all or some segments do not light up. b) At a certain digit, brightness is low. c) Only one indicator does not light. d) The corresponding segments of all digits do not light up; or they continue to light up. e) Wrong figure appears. f) A certain group of indicators do not light up. g) The figure of all digits flicker. 3) Other possible problems caused by defective control unit.
R402JWT [13] Procedure L: RELAY 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. 4. Disconnect the leads to the primary of the power transformer. 5. Ensure that these leads remain isolated from other components and oven chassis by using insulation tape. 6. After that procedure, re-connect the power supply cord. 7.
R402JWT 5) Make a visual inspection of the varistor. Check for burned damage and examine the transformer with a tester for the presence of layer short-circuit (check the primary coil resistance which is approximately 563Ω±10%). If any abnormal condition is detected, replace the control unit. a 6) Reconnect all leads removed from components during testing. 7) Re-install the outer case (cabinet). c 8) Reconnect the power supply cord after the outer case is installed.
R402JWT Service Manual CHAPTER 9. TOUCH CONTROL PANEL ASSEMBLY R402JWT [1] OUTLINE OF TOUCH CONTROL PANEL 3) Power Source Circuit This circuit generates voltage necessary in the control unit from the AC line voltage. The touch control section consists of the following units. (1) Key Unit In addition, the synchronizing signal is available in order to compose a basic standard time in the clock circuit. (2) Control Unit (The Control Unit consists of Power Unit and LSI Unit).
R402JWT Pin No. 18 Signal P50 I/O OUT Description Magnetron high-voltage circuit driving signal. To turn on and off the cook relay (RY2). The signals holds “L” level during microwave cooking and “H” level Maximum while not cooking. In other cooking modes (variable output cooking) the signal turns to “H” level and “L” level in repetition according to the power level. OFF ON OFF 70% of maximum output 19 20 P47 P46 IN OUT 21 P45 IN 22-23 P44-P43 OUT 24 INTP0 H : GND L : -5V OFF 24 sec.
R402JWT Pin No. Signal I/O 56-72 SEG16-SEG0 OUT 73 VCC IN 74 VREF IN 75 AVSS IN 76 COM3 OUT 77 COM2 OUT 78 COM1 OUT 79 COM0 OUT 80 VL3 IN Description Segment data signal. Connected to LCD. The relation between signals are as follows: LSI signal (Pin No.) LCD (segment) LSI signal (Pin No.
R402JWT [3] SERVICING FOR TOUCH CONTROL PANEL 1. Precautions for Handling Electronic Components b) On some models, the power supply cord between the touch control panel and the oven proper is so long enough that they may be separated from each other.
R402JWT Service Manual SOLDER CHAPTER 10. PRECAUTIONS FOR USING LEAD-FREE R402JWT [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: Indicates lead-free solder of tin, silver and copper [2] Using lead-free wire solder When repairing a PWB with the “LF” symbol, only lead-free solder should be used.
R402JWT Service AND Manual ADJUSTMENT PROCECHAPTER 11. COMPONENT REPLACEMENT R402JWT DURE [1] WARNINGS WARNING AGAINST HIGH VOLTAGE: Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts may result in severe, possibly fatal, electric shock. (Example) High Voltage Capacitor, Power Transformer, Magnetron, High Voltage Rectifier Assembly, High Voltage Harness etc.. WARNING: Avoid possible exposure to microwave energy.
R402JWT [2] OUTER CASE REMOVAL NOTE: When replacing the outer case, the 2 special Torx screws must be reinstalled in the same locations. To remove the outer case, procedure as follows. 1. Disconnect the power supply cord. 2. Open the oven door and block it open. 3. Remove the two (2) screws from the lower portion of the rear cabinet using a T20H Torx type or GTXH20-100 screw driver. 4. Remove the remaining two (2) screws from rear. 5.
R402JWT 5. Reinstall outer case and check that the oven is operating properly. 3. Hold the chassis support to the oven cavity front plate and the magnetron with the two (2) screws. CAUTION: WHEN REPLACING MAGNETRON, BE SURE THE R.F. GASKET IS IN PLACE AND MOUNTING SCREWS ARE TIGHTENED SECURELY. 4. Reconnect the wire leads to the magnetron. Refer to “PICTORIAL DIAGRAM”. [6] OVEN LAMP REMOVAL 1. Disconnect the power supply cord and then remove outer case. 7. Now, the oven lamp is free. 2.
R402JWT Control panel frame Left tab Square hole of control panel frame Cut off portion Small depression Display window Right tab Ribbon cable Slit Wire lead Back light PWB (LD10) Back light PWB installation CAUTION: When the back light PWB is installed into the square hole of the control panel frame, the wire leads should be routed through the cut off portion, not to be pinched.
R402JWT Coil Shaft Groove joint pliers Shaft Axis Stator Gap Bracket These are the positions that should be pinched with pliers. Stator Rotor Rear View Table Center of bracket Rotor Side View [12] DOOR SENSING SWITCH/PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH REMOVAL 1. REMOVAL At this time switch lever will be free, do not lose it. 1. Disconnect the power supply cord and remove outer case. 2. REINSTALLATION 2. Open the door and block it open. 4. Disconnect wire leads from the switches. 1.
R402JWT 2) An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards. 3. Insert a putty knife (thickness of about 0.5mm) into the gap between the door stopper and the choke cover to free engaging parts as shown in Figure C-4. 4. Try the principles of the lever and lift up the door stopper. 3. After any service, make sure of the following: 5. Now, the door stopper is free from the door assembly. 1.
Figure S-1. Pictorial Diagram 12 – 1 ORG WHT GRY RY1 T1 COM. PRIMARY NO INTERLOCK SWITCH N.C. RED GRY GRY WHT WHT COM. WHT WHT GRY GRN WHT GRY TURNTABLE MOTOR BRN ORG OVEN LAMP RED THERMAL CUT-OUT (OVEN) RED RED RED WHT WHT MAGNETRON TEMP FUSE ORG ORG N POWER SUPPLY CORD 120V 60Hz NOTE: The grounding conductor of the power supply cord has been grounded by power supply cord fixing screw. The screw must always be kept tight.
AC(N) Figure S-2. Control Panel Circuit 12 – 2 DOOR SENSING SWITCH MICRO AC(H) OVEN LAMP, TURNTABLE MOTOR, FAN MOTOR B-2 B-1 㽲 WH-1 WH-1 㽳 d a D1~D4 510 1/2W 510 1/2W NOTE: D31 1SS270A D30 1SS270A DU12D1-1P(M)-R RY2 DU12D1-1P(M)-R RY1 R8 D6 R3 KTA1267Y Q2 4.7K 1/4W R5 510 1/2W POWER UNIT 5% Q4 DTA123JS 10u/35V C5 Q3 DTD143ES SP1 LTST-C190KGKT x 4 LD4 LD3 LD2 LD1 27 1/4W R4 1SS270A x2 D5 R2 JUMPER WIER : IF NOT SPECIFIED 1/10W 0.
R402JWT [3] Printed Wiring Board (Figure S-3) Figure S-3.
R402JWT PARTS LIST MICROWAVE OVEN HOW TO ORDER REPLACEMENT PARTS To have your order filled promptly and correctly, please furnish the following information. 1. MODEL NUMBER 2. REF. NO. 3. PART NO. 4. DESCRIPTION MODELS R-402JK-T R-402JW-T Parts marked "*" may cause undue microwave exposure. Parts marked " " are used in voltage more than 250V.
R402JWT [1] OVEN PARTS 7-10 7-2 7-10 2-1 4-13 7-2 6-3 4-15 6-4 1-6 4-11 1-10 7-1 1-2 7-9 7-6 1-7 4-3 1-1 1-3 7-5 7-8 4-5 7-8 4-4 7-10 4-8 1-5 4-7 4-12 7-3 7-10 7-3 6-2 7-7 4-10 4-1 1-12 1-11 1-4 4-14 1-13 7-1 6-1 1-2 2-2 1-4 7-8 4-6 4-2 1-9 1-8 7-1 7-10 7-10 2-3 2-3 7-4 2-3 2-3 2 4-9
R402JWT NO. PARTS CODE PRICE NEW PART RANK MARK RANK DESCRIPTION [1] OVEN PARTS ! * ! ! ! ! ! * * ELECTRIC PARTS 1-1 FPWBFA417WRKZ 1-1 FPWBFA389WRKZ 1-2 FFS-BA033WRKZ 1-2 FFS-BA037WRKZ 1-3 QFS-TA013WRE0 1-4 QSW-MA085WRE0 1-4 QSW-MA147WRZZ AY AW -AN AG AF AG Noise filter assembly Noise filter assembly (Interchangeable) Monitor fuse 20A and monitor switch (V-5220Q) Monitor fuse 20A and monitor switch (D3V-1G-2C25) Temp.
R402JWT [2] DOOR & CONTROL PANEL PARTS 5-8 5-5 5-1 5-2 5-3 5-4 5-7 5-6 3-1 3-5 3-5 3-1-3 3-4 3-1-1 3-1-2 6-5 3-3 3-2 Actual wire harness may be different from illustration.
R402JWT NO.
R402JWT INDEX PARTS CODE [D] DPWBFC531WRKZ [F] FACCDA083WRE0 FACCDA085WREZ FACCDA103WREZ FDORFA412WRTZ FFS-BA033WRKZ FFS-BA037WRKZ FH-DZA118WRKZ FPNLCB902WRKZ FPNLCB903WRKZ FPWBFA389WRKZ FPWBFA417WRKZ FROLPA097WRKZ FW-VZC093WREZ FW-VZC094WREZ [G] GCABUA991WRPZ GCABUB012WRPZ GCOVHA382WRF0 GDAI-A390WRWZ GLEGPA104WREZ GMADIA161WRFZ GWAKPB034WRRZ GWAKPB036WRRZ [H] HPNL-A868WREZ HPNL-A869WREZ [J] JBTN-B359WRFZ JBTN-B360WRFZ [L] LANGTA419WRPZ LBNDKA163WRPZ LSTPPA139WRF0 LSTPPA167WRF0 LX-CZ0052WRE0 LX-CZA070WRE0
