R-210A SERVICE MANUAL SX737R210APT/ MICROWAVE OVEN COOKING CONTROL DEFROST MED RICE MED LOW MED HIGH LOW HIGH DEFROST kg TIMER RICE 1.0 MODEL R-210A 0.5 4 2 DOOR OPEN 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-210A
R-210A SERVICE MANUAL MICROWAVE OVEN PRODUCT SPECIFICATIONS R-210A GENERAL IMPORTANT INFORMATION APPEARANCE VIEW This Manual has been prepared to provide Sharp Corp. Service 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 customer service.
R-210A PRODUCT DESCRIPTION SPECIFICATION ITEM Power Requirements DESCRIPTION 110 Volts 60 Hertz Single phase, 2 wire Power Consumption 1.1 KW Power Output 700 watts nominal of RF microwave energy (IEC-705) 600 watts nominal of RF microwave energy (2 litre water load ) Operating frequency 2450 MHz Case Dimensions Width 450 mm Height 295 mm including foot Depth 355 mm Cooking Cavity Dimensions Width 288 mm Height 195 mm Depth 319 mm Turntable diameter 272mm Control Complement 30 min.
R-210A APPEARANCE VIEW 2 10 3 1 OVEN 13 9 COOKING CONTROL DEFROST MED MED LOW RICE MED HIGH HIGH LOW TIMER DEFROST kg RICE 1.0 11 0.5 4 2 DOOR OPEN 8 14 4 5 1. 2. 3. 4. 5. 6 Ventilation openings Oven lamp Door hinges Door safety latches See through door 7 4 15 12 6. Door seals sealing surfaces 7. Coupling 8. Door open button 9. Control panel 10.Waveguide cover 11.Power supply cord 12.Rating label 13.Turntable 14.Roller stay 15.
R-210A OPERATION SEQUENCE 7-1. When the oven door is opened during or after the cycle of a cooking program, the 1st latch switch and 2nd latch switch must open their (COM-NO) contacts first. After that the contacts (COM-NC) of the monitor switch can be closed. 7-2. When the oven door is closed. The contacts (COMNC) of the monitor switch must be opened and the contacts (COM-NO) of the 2nd latch switch and the 1st latch switch must be closed. 7-3.
R-210A FUNCTION OF IMPORTANT COMPONENTS setting of cook time or failure of control unit. Under normal operation, the temp. fuse remains closed. However, when abnormally high temperatures are reached within the oven cavity, the temp. fuse will open at 120˚C, causing the oven to shut down. The defective fuse must be replaced with a new one. DOOR OPEN MECHANISM The door can be opened by pushing the open button on the control panel.
R-210A Note: because approx. 2 seconds are needed for heating up the magnetron filament. The ON/OFF time ratio does not exactly correspond to the percentage of microwave power, SERVICING WARNING TO SERVICE PERSONNEL 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 Fuse, High voltage harness.
R-210A CONDITION Fuse 13A blows when power cord is plugged into wall outlet. OFF CONDITION Fuse 13A blows when the door is opened. Home fuse blows when power cord is plugged into wall outlet. Oven does not operate at all. Oven goes into cook cycle but shuts down before end of cooking cycle. Oven lamp does not light. (Fan motor rotates) Fan motor does not operate, but oven lamp lights. COOKING CONDITION Timer motor does not operate, but oven lamp lights.
R-210A 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-210A TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Initial temperature .................................................................................................. T1 = 11°C Temperature after (60 + 2) = 62 sec. ..................................................................... T2 = 21°C Temperature difference Cold-Warm .................................................................... ∆T1 = 10°C Measured output power The equation is “P = 70 x ∆T” ...........................................
R-210A TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST CAUTION: 1˚C CORRESPONDS TO 60 WATTS. REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT. 1l (T1 C) 1l 1l (T2 C) (T1 C) 1l (T2 C) Heat up for 2 min. 22 sec. B POWER TRANSFORMER TEST WARNING: High voltages and large currents are present at the secondary winding and filament winding of the power transformer. It is very dangerous to work near this part when the oven is on.
R-210A TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST F. When the internal wire is opened in the high voltage capacitor shows an infinite resistance. G. The resistance across all the terminals and the chassis must be infinite when the capacitor is normal. If incorrect reading are obtained, the high voltage capacitor must be replaced. CARRY OUT 4R CHECKS. E SWITCH TEST Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table.
R-210A TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST If the fuse 13A is blown by incorrect door switching replace the defective switch(es) and the fuse 13A. If the fuse 13A is blown, there is a shorts or grounds in electrical parts or wire harness. Check them and replace the defective parts or repair the wire harness. CARRY OUT 4R CHECKS. CAUTION: I Only replace fuse with the correct value replacement.
R-210A 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-210A HIGH VOLTAGE COMPONENTS REMOVAL (HIGH VOLTAGE CAPACITOR, HIGH VOLTAGE RECTIFIER ASSEMBLY AND H.V. FUSE) 9. Disconnect the H.V. fuse from high voltage capacitor. 10.Remove the HVC cover from the high voltage capacitor. 11.Now H.V. rectifier assembly, H.V. fuse and H.V. capacitor should be free. To remove the components, proceed as follows. 1. CARRY OUT 3D CHECKS. 2. Disconnect the H.V. fuse from the power transformer. 3. Disconnect the H.V. wire of the H.V. rectifier assembly from the magnetron. 4.
R-210A POWER SUPPLY CORD REPLACEMENT Removal 1. CARRY OUT 3D CHECKS. 2. Disconnect the wire leads from the power supply cord. 3. Remove the one (1) screw holding the power supply cord to the oven cavity back plate. 4. Remove the power supply cord from the oven cavity back plate. Re-install 1. Insert the power supply cord into the oven cavity back plate. 2. Secure the one (1) screw holding the power supply cord to the oven cavity back plate.. 3.
R-210A CAUTION: • Do not re-use the removed fan blade because the hole (for shaft) may be lager than normal. 9. Remove the two (2) screws holding the fan motor to the fan duct. 10. Now, the fan motor is free. 3. INSTALLATION 1. 2. 1) 2) 3) Install the fan motor to the fan duct with the two (2) screws. Install the fan blade to the fan motor shaft according the following procedure. Hold the centre of the bracket which supports the shaft of the fan motor on the flat table.
R-210A flange of the oven front face. 2. With the door closed, adjust latch hook by moving it back and forth and up and down. In and out play of the door allowed by the upper and lower position of the latch hook should be less than 0.5mm. The horizontal position of the latch hook should be adjusted so that the monitor switch is activated with the door closed. The vertical position of the latch hook should be adjusted so that the 1st. latch switch and the 2nd.
R-210A ture, light or sensing of gentle warm air movement around oven door is not abnormal and do not of themselves indicate a leakage of microwave energy from oven cavity. PIN UPPER OVEN HINGE DOOR PANEL CHOKE COVER LOWER OVEN HINGE PIN Figure C-8. Door Replacement SEALER FILM Installation 1. Put the adhesive tape on the backing film of the sealer film as shown in Fig. C-9. 2. Tear the backing film by pulling the adhesive tape. 3. Put the pasted side of the sealer film on the door panel.
R-210A MICROWAVE MEASUREMENT After adjustment of door latch switches, 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. REQUIREMENT The safety switch must prevent microwave radiation emission in excess of 5mW/cm2 at any point 5cm or more from external surface of the oven.
2ND. LATCH SWITCH IN1 20 Figure O-2 Oven Schematic-ON Condition TTM FM OL H.V.RECTIFIER H.V. CAPACITOR 0.86µ AC2000V H.V. FUSE 0.6A MONITOR SWITCH TURNTABLE MOTOR FAN MOTOR OVEN LAMP TM MAGNETRON POWER TRANSFORMER AC2 NOISE FILTER 1ST. LATCH SWITCH TEMP. FUSE 120˚C (OVEN) IN2 2ND. LATCH SWITCH IN1 TTM FM OL TM H.V.RECTIFIER H.V. CAPACITOR 0.86µ AC2000V H.V. FUSE 0.
H 1 2 5 2 1 G W O O O R R H R R R E Y T G G G D 6 2ND LATCH SWITCH 3 21 4 COM. BLU 5 WHT GRY BLK GRY GRY POWER TRANSFORMER MAGNETRON H.V. FUSE H.V. RECTIFIER HIGH VOLTAGE CAPACITOR 4 5 Figure S-1. Pictorial Diagram TURNTABLE MOTOR RED ORG Cabinet side RED WHT HIGH VOLTAGE COMPONENTS IN2 IN1 3 GRY FAN MOTOR ORG RED WHT GRY AC1 AC2 B COM. WHT WHT RED RED BLU BLK POWER SUPPLY CORD 110V 60Hz A N.O. N.C.
R-210A 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-210A Note: The parts marked "∆" may cause undue microwave exposure. The parts marked "*" are used in voltage more than 250V. REF. NO. 6-10 PART NO.
R-210A 2 1 4 3 6 5 7-7 A OVEN AND CABINET PARTS A 7-7 7-7 2-1 4-19 1-5 7-9 1-10 B 7-8 7-2 7-6 7-7 B 7-2 1-13 4-2 1-9 4-12 4-15 1-14 C 7-9 4-3 C 6-6 6-5 4-13 6-10 4-5 7-2 7-8 7-12 4-6 6-8 7-5 4-7 D D 1-8 1-4 4-20 4-14 7-11 6-2 1-6 7-7 4-11 1-7 1-16 7-4 7-13 7-10 4-16 E 7-2 7-2 7-2 4-17 4-1 1-2 4-4 6-7 1-11 E 1-15-1 1-15 1-3 4-10 1-2 6-1 7-3 2-2 1-12 F F 4-9 4-18 7-8 7-7 G G 7-7 2-3 7-7 2-3 4-8 7-7 H 1 2 4 3 24 H 5 6
R-210A 2 1 4 3 6 5 CONTROL PANEL PARTS 3-4 A A 1-1 7-1 B B 3-3 3-1 C C 3-2 5-8 3-5 5-6 5-7 5-1 D D DOOR PARTS 5-2 5-7 E E 5-3 5-7 F F 5-4 5-5 G G MISCELLANEOUS 6-9 6-4 H H Actual wire harness may be different than illustration.
R-210A '97SHARP CORP. (11K0.