R-204(W) SERVICE MANUAL S8102R204PHW/ MICROWAVE OVEN 0 30 25 20 15 14 13 12 11 800 560 400 240 80 MODEL R-204(W) 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 .................................................................................................... 1 WARNING ...................................................................................
R-204(W) CAUTION MICROWAVE RADIATION Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating devices if it is improperly used or connected. All input and output microwave connections, waveguides, flanges and gaskets must be secured. Never operate the device without a microwave energy absorbing load attached. Never look into an open waveguide or antenna while the device is energized.
R-204(W) SERVICE MANUAL SERVICING PRODUCT SPECIFICATIONS MICROWAVE OVEN R-204(W) GENERAL INFORMATION GENERAL IMPORTANT INFORMATION This Manual has been prepared to provide Sharp Corp. Service engineers with Operation and Service Information. APPEARANCE VIEW It is recommended that service engineers carefully study the entire text of this manual, so they will be qualified to render satisfactory customer service. OPERATING SEQUENCE WARNING Note: The parts marked "*" are used at voltage more than 250V.
R-204(W) SERVICING WARNING TO SERVICE PERSONNEL GB Microwave ovens contain circuitry capable of producing very high voltage and current, contact with following parts will result in electrocution. High voltage capacitor, Power transformer, Magnetron, High voltage rectifier assembly, High voltage harness. REMEMBER TO CHECK 3D REMEMBER TO CHECK 4R 1) Disconnect the supply. 2) Door opened, and wedged open. 3) Discharge high voltage capacitor. 1) Reconnect all leads removed from components during testing.
R-204(W) E Los hornos de microondas contienen circuitos eléctricos capaces de producir voltajes de alta tensión y descargas eléctricas. Para evitar el riesgo de electrocución, absténgase de tocar los siguientes componentes: condensador de alta tensión, transformador de alta tensión, magnetrón, dispositivo del rectificador de alta tensión y arnés de alta tensión. RECUERDE LA COMPROBACION 3D RECUERDE LA COMPROBACION 4C 1) Desconecte la alimentación. 2) Deje la puerta abierta y calzada.
R-204(W) I I forni a microonde contengono un circuito elettrico in grado di generare tensioni e correnti estremamente elevate. L’eventuale contatto con i seguenti componenti può causare la folgorazione: condensatore ad alta tensione; trasformatore ad alta tensione; magnetron; rettificatore alta tensione; cablaggio ad alta tensione. TRE OPERAZIONI IMPORTANTI PER INCOMINCIARE QUATTRO VERIFICHE IMPORTANTI DA NON DIMENTICARE 1) Scollegare l'alimentazione elettrica.
R-204(W) PRODUCT DESCRIPTION SPECIFICATION ITEM DESCRIPTION Power Requirements 230 Volts 50 Hertz Single phase, 3 wire earthed Power Consumption 1.
R-204(W) APPEARANCE VIEW OVEN 9 10 11 12 1 8 2 7 6 1. 2. 3. 4. 5. 6. 7. Control panel Door opening button Waveguide cover Seal packing Oven cavity Door Door safety latch 5 4 3 13 8. Door hinges 9. Door seals and sealing surfaces 10.Safety door latches 11.Ventilation openings 12.Outer case 13.Power cord Turntable Roller stay Seal packing 1. Place the roller stay on the floor of the oven cavity, engaging shaft into turntable motor shaft. 2. Then place the turntable on the roller stay.
R-204(W) OPERATION SEQUENCE OFF CONDITION control switch (SW3) are made open. Closing the door activates all door interlock switches (1st. interlock switch and 2nd. interlock relay control switch). 6. MONITOR SWITCH CIRCUIT The monitor switch (SW2) is mechanically controlled by oven door, and monitors the operation of the 1st. interlock switch (SW1). 6-1 When the oven door is opened during or after the cycle of a cooking program, the 1st. interlock switch (SW1) and 2nd.
R-204(W) FUNCTION OF IMPORTANT COMPONENTS If the food load is overcooked, by either error in cook time or defect in the control unit, the temperature fuse will open. Under normal operation, the temperature fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the temperature fuse will open at 248˚F(120˚C), causing the oven to shut down. DOOR OPEN MECHANISM The door is opened by pushing the open button on the control panel, refer to the Figure D-1.
R-204(W) TROUBLESHOOTING GUIDE 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. Home fuse blows when power cord is plugged into wall outlet. Fuse F8A blows when power cord is plugged into wall outlet. (Timer off) OFF CONDITION Oven does not operate at all.
R-204(W) TEST PROCEDURES PROCEDURE LETTER A 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 the high voltage circuit by removing all leads connected to the filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a reading of less than 1 ohm.
R-204(W) TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Room temperature ....................... To = 21˚C Initial temperature .................... T1 = 11°C Temperature after (52 + 3) = 55 sec. ..................................................................... T2 = 21°C Temperature difference Cold-Warm ................................................................... ∆T1 = 10°C Measured output power The equation is “P = 80 x ∆T” ......................................................
R-204(W) TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST C. A normal capacitor shows continuity for a short time (kick) and then a resistance of about 10MΩ after it has been charged. D. A short-circuited capacitor shows continuity all the time. E. An open capacitor constantly shows a resistance about 10 MΩ because of its internal 10MΩ resistance. F. When the internal wire is opened in the high voltage capacitor, the capacitor shows an infinite resistance. G.
R-204(W) TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST NOISE FILTER MEASURING POINTS Between N and L Between terminal N and WHITE Between terminal L and RED INDICATION OF OHMMETER Approx. 680 kΩ Short circuit Short circuit L N LINE CROSS CAPACITOR 0.068µ/AC250V F1: FUSE M8A NOISE SUPPRESSION COIL If incorrect readings are obtained, replace the noise filter unit. LINE BYPASS CAPACITOR 0.0022µ/AC250V CARRY OUT 4R CHECKS. WHT I LINE BYPASS CAPACITOR 0.
R-204(W) TEST PROCEDURES PROCEDURE LETTER L COMPONENT TEST RELAY TEST CARRY OUT 3D CHECKS. Remove the outer case and check voltage between Pin No. 3 of the 2 pin connector (A) and the common terminal of the relay RY2 on the control unit with an A.C. voltmeter. The meter should indicate 230 volts, if not check oven circuit. Relay Test Check voltage at the relay coil with a D.C. voltmeter during the microwave cooking operation. DC. voltage indicated .......... Defective relay. DC. voltage not indicated ..
R-204(W) CONTROL PANEL ASSEMBLY OUTLINE OF CONTROL PANEL Control Unit Control unit consists of LSI, power source circuit, synchronizing signal circuit, ACL circuit, buzzer circuit, encoder circuit, indicator circuit and potentiometer circuit. 5) Buzzer Circuit The buzzer is responsive to signals from the LSI to emit audible sounds (tact switch touch sound and completion sound).
R-204(W) Pin No. 8 Signal I/O P20 OUT Description Magnetron high-voltage circuit driving signal. ON/OFF time ratio in Micro cooking (a. 32second time base) To turn on and off the cook relay (RY2). The signal holds "L" level during microwave cooking and "H" level while not cooking. In other cooking modes (70%, 50%, 30%, 10%) the signal turns to "H" level and "L" level in repetition according to the power level. MICRO COOK 100% 70% 50% 30% 10% ON OFF 32sec. 24sec. 18sec. 12sec. 6sec. 0sec. 8sec.
R-204(W) SERVICING As for the sensor-related controls of the touch control panel, checking them is possible if the dummy resistor(s) with resistance equal to that of the controls are used.
R-204(W) COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE WARNING: Avoid possible exposure to microwave energy. Please follow the instructions below before operating the oven. 1. Disconnect oven from power supply. 2. Make sure that a definite” click” can be heard when the microwave oven door is unlatched. (Hold the door in a closed position with one hand, then push the door open button with the other, this causes the latch leads to rise, it is then possible to hear a “click’ as the door switches operate.) 3.
R-204(W) MAGNETRON REMOVAL 1. CARRY OUT 3D CHECKS. 2. Disconnect the wire leads from magnetron. 3. Remove the three (3) screws holding the magnetron to the waveguide. 4. Remove the magnetron from waveguide. 5. Now, the magnetron is free. CAUTION: WHEN REPLACING THE MAGNETRON, BE SURE THE R.F. GASKET IS IN PLACE AND THE MAGNETRON MOUNTING SCREWS ARE TIGHTENED SECURELY. HIGH VOLTAGE COMPONENTS REMOVAL (HIGH VOLTAGE CAPACITOR AND HIGH VOLTAGE RECTIFIER ASSEMBLY) To remove the components, proceed as follows.
R-204(W) TURNTABLE MOTOR REMOVAL Removal Re-install 1. Disconnect the oven from the power supply. 2. Remove the turntable and turntable support from the oven cavity. 3. Turn the oven over. 4. Remove the one (1) screw holding the turntable motor cover to the bottom plate. 5. Now, the turntable motor cover is free. 6. Disconnect the wire leads from the turntable motor. 7. Remove the single (1) screw holding the turntable motor to the oven cavity. 8. Remove the turntable motor from the oven cavity. 9.
R-204(W) POWER SUPPLY CORD REPLACEMENT Removal Re-install 1. CARRY OUT 3D CHECKS. 2. Remove the single (1) screw holding the green/yellow wire to the oven cavity. 3. Disconnect the leads of the power supply cord from the noise filter, referring to the Figure C-3 (a). 4. Release the moulding cord stopper of the power supply cord from the square hole of the oven cavity back plate, referring to the Figure C-3 (b). 5. Now, the power supply cord is free. 1.
R-204(W) After adjustment, check the following. 1. In and out play of door remains less than 0.5mm when in the latched position. First check upper position of latch hook, pushing and pulling upper portion of door toward the oven face. Then check lower portion of the latch hook, pushing and pulling lower portion of the door toward the oven face. Both results (play in the door) should be less than 0.5mm. 2. The 1st. interlock switch, 2nd.
R-204(W) SEALER FILM Installation 1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-7. 2. Tear the backing film by pulling the adhesive tape. 3. Put the pasted side of the sealer film on the door panel Sealer film Backing film Adhesive tape Figure C-7.
R-204(W) MICROWAVE MEASUREMENT After adjustment of 1st. interlock switch, 2nd. interlock relay control switch, monitor switch and door are completed individually or collectively, the following leakage test must be performed with a survey instrument and it must be confirmed that the result meets the requirements of the performance standard for microwave oven. 2. 3.
R-204(W) TEST DATA AT A GLANCE PARTS Fuse Temperature fuse (OVEN) Oven lamp High voltage capacitor Magnetron High voltage transformer SYMBOL F1 TF OL C MG T VALUE / DATA M 8A 250V 120°C 240–250 V 25W 0.91µF AC 2100V Filament < 1Ω / Filament – chassis ∞ ohm. Filament winding < 1Ω Secondary winding Approx. 185 Ω Primary winding Approx. 2.4 Ω WARNING: DISCONNECT THE PLUG WHEN MEASURING RESISTANCE. SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. TIMER OFF.
H 1 2 T1 3 26 CN-A 1 4 G 5 COM. N.O. COM. GRY WHT WHT WHT BLK GRY ORG ORG FM: FAN MOTOR Figure S-1. Pictrorial Diagram TTM: TURNTABLE MOTOR E SW2: MONITOR SWITCH N.C. GRY GRY ORG RED WHT GRY GRY ORG WHT L B R N RED LIVE RED H.V. RECTIFIER T: HIGH VOLTAGE TRANSFORMER F2: HIGH VOLTAGE FUSE MG: MAGNETRON C: HIGH VOLTAGE CAPACITOR HIGH VOLTAGE COMPONENTS WHT N AL UTR B L U POWER SUPPLY CORD 4 SW1: 1ST.
2 3 27 4 2ND. INTERLOCK RELAY CONTROL SWITCH b VRS1 (J1) 10G471K c 6 4 NOTE Q24 KTA1274 RY1 RY2 a d 1 3 D1 D22 D2 – + C1 470µ/35v D20 – + Q40 KRA101M 5 C2 0.1µ/50v : IF NOT SPECIFIED, 0.01µF/ 50V : IF NOT SPECIFIED, 1/10W ± 5% ZD2 HZ4A2 Q1 KTA1274 ZD1 HZ6A3 R32 4.7k R31 15k R1 100 2w R2 2k 1/2w Q2 KRA117M C8 C11 C3 R3 4.7k Figure S-2. Control Unit Circuit D30 C20 0.1µ/50v Q20 KRA101M Q22 KRA101M R40 3.
R-204(W) A R52 R53 R54 R55 JP6 DIP JP10 JP11 C8 Q22 B C21 Q20 JP21 E B R10 Q10 E ZD3 DU D22 Q21 E B Q24 E OM E B JP20 3 D2 4 5 S D21 2 P D1 6 D3 1 VRS1 RY1 7 T1 1 3 JP18 2 3 2 1 VR1 D4 CNA J1 JP14 B JP19 JP22 Q1 JP17 E ZD2 JP13 Q2 CNB B JP12 1 E JP15 JP16 D20 C1 28 C4 F RY2 F 6 5 4 3 2 1 G G B E SP1 Q40 JP23 B E E R2 R1 E JP2 JP1 JP4 JP3 B D20 ZD1 B E C B A SW1 B E D D Q50 C B E JP7 JP8 JP9 C B Q53 B A R51 R50 0 RD107AF 6 5
R-204(W) 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.
R-204(W) Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. 7- 7 7- 8 7- 9 PART NO. XHPSD40P08000 XOTSD40P12RV0 XOTSE40P08000 DESCRIPTION Q'TY CODE 3 5 2 AA AA AA Screw : 4mm x 6mm Screw : 4mm x 12mm Screw : 4mm x 8mm HOW TO ORDER REPLACEMENT PARTS To have your order filled prompty and correctly, please furnish the following information. 1. MODEL NUMBER 3. PART NO. 2. REF. NO. 4.
R-204(W) 2 1 3 4 5 6 OVEN PARTS A A 7-8 2-1 7-8 7-8 7-8 B B 7-8 2-3 C C OL 4-9 7-9 4-3 7-9 7-7 F1 7-3 7-3 7-2 7-6 7-1 7-3 D D 1-2 MG TF 4-4 4-11 7-1 1-1 FM R 6-3 4-9 7-3 7-5 E E T 4-5 7-2 F F 4-8 4-1 6-1 7-4 SW3 4-10 2-2 7-1 7-3 F2 G G 1-3 C SW2 7-1 6-2 TTM 2-2 SW1 4-7 4-2 4-6 7-2 H 1 2 H 3 4 31 5 6
R-204(W) 2 1 3 4 5 CONTROL PANEL PARTS A 3-2 6 3-9 A 3-1 3-3 3-9 B B 3-5 3-8 3-6 DOOR PARTS C C 5-7 3-7 5-6 3-4 D D 5-1 5-2 5-3 E E F F 5-5 5-4 G G MISCELLANEOUS 6-4 Actual wire harness may be different than illustration.
R-204(W) PACKING AND ACCESSORIES TOP PAD ASSEMBLY FPADBA459WRKZ DOOR PROTECT SHEET WRAP COVER SPADPA580WRE0 SSAKHA014WRE0 6-5 INSTRUCTION BOOK 6-1 TURNTABLE TRAY MICROWAVE OVEN BOTTOM PAD ASSEMBLY FPADBA460WRKZ 6-2 TURNRTABLE SUPPORT INTO THE OVEN CAVITY Not replaceable items.
R-204(W) '01 SHARP CORP. (8S1.
