R-1200 R-1201 SERVICE MANUAL SY130R1200X// OVER THE COUNTER MICROWAVE OVEN MODELS R-1200 R-1201 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 the following parts may result in a severe, possibly fatal, electrical shock.
R-1200 R-1201 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.
R-1200 R-1201 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. (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. Don't Touch ! Danger High Voltage When the testing is completed, 1.
R-1200 R-1201 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 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.
R-1200 R-1201 SERVICE MANUAL PRODUCT DESCRIPTION OVER THE COUNTER MICROWAVE OVEN R-1200/ R-1201 GENERAL INFORMATION FOREWORD This Manual has been prepared to provide Sharp Electronics Corp. Service Personnel with Operation and Service Information for the SHARP OVER THE COUNTER MICROWAVE OVEN, R-1200 and R-1201. 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.
R-1200 R-1201 PRODUCT SPECIFICATION ITEM DESCRIPTION Power Requirements 120 Volts / 14.1 Amperes 60 Hertz Single phase, 3 wire grounded Power Output 1100 watts (IEC TEST PROCEDURE) Operating frequency of 2450MHz Width 23-7/8" Height 14-1/16" Depth 15- 9/16" Width 17-1/2" Height 9-7/8" Depth 14-15/16" Case Dimensions Cooking Cavity Dimensions 1.
R-1200 R-1201 Electrical Requirements The oven is equipped with a 3-prong grounding plug. DO NOT UNDER ANY CIRCUMSTANCES CUT OR REMOVE THE GROUNDING PIN FROM THE PLUG. The power supply cord and plug must be connected to a separate 120 Volt AC, 60 Hz, 15 Amp. or more dedicated line, using a grounded receptacle. The receptacle should be located inside the cabinet directly above the Microwave Oven/Hood system mounting location.
R-1200 R-1201 OPERATION DESCRIPTION OF OPERATING SEQUENCE The following is a description of component functions during oven operation. so that it will function in the following sequence. (1) When the door opens from a closed position, the secondary interlock relay (RY2) and primary interlock switch open their contacts. And contacts of the relay (RY1) remains closed. Then the monitor switch contacts close.
R-1200 R-1201 NOTE: " SCHEMATIC NOTE: CONDITION OF OVEN 1. DOOR CLOSED. 2. CLOCK APPEARS ON DISPLAY. " indicates components with potential above 250V. CAVITY TEMPERATURE FUSE MAGNETRON TEMPERATURE FUSE CONTROL UNIT N.O. COM. A1 B1 DOOR SENSING SWITCH FUSE 20A B2 RY2 RY1 A3 A5 N.O. HIGH VOLTAGE CAPACITOR 1.0µF/ AC2300V COM. HL OVEN LAMP HOOD LAMP HL OL TTM FM MONITOR SWITCH WHT RY4 TURNTABLE MOTOR 120 V AC.
R-1200 R-1201 DESCRIPTION AND FUNCTION OF COMPONENTS 3. If the door is opened, and the secondary interlock relay (RY2) and primary interlock switch contacts fail to open, the monitor fuse blows simultaneously with closing of the monitor switch contacts. CAUTION: BEFORE REPLACING A BLOWN MONITOR FUSE TEST THE DOOR SENSING SWITCH, SECONDARY INTERLOCK RELAY (RY2), RELAY (RY1), PRIMARY INTERLOCK SWITCH AND MONITOR SWITCH FOR PROPER OPERATION. (REFER TO CHAPTER "TEST PROCEDURE").
R-1200 R-1201 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 will require that a specific test be performed. These tests are given a procedure letter which will be found in the "Test Procedure "section.
R-1200 R-1201 CK = Check / RE = Replace OFF CONDITION IDLE CONDITION MICROWAVE COOKING CONDITION Home fuse blows when power cord is plugged into wall receptacle. Monitor fuse blows when power cord is plugged into wall receptacle. Display does not illuminate when power cord is first plugged into wall receptacle. Display does not operate properly when STOP/CLEAR pad is touched. (The time of day should appear on the display with beep sound during normal condition.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER A COMPONENT TEST MAGNETRON ASSEMBLY TEST 1. 2. 3. 4. 5. 6. 7. 8. 9. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. 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.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST (HIGH VOLTAGES ARE PRESENT AT THE HIGH VOLTAGE TERMINAL, SO DO NOT ATTEMPT TO MEASURE THE FILAMENT AND HIGH VOLTAGE.) C HIGH VOLTAGE RECTIFIER TEST 1. 2. 3. 4. Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor. Isolate the rectifier from the circuit.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 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. CAUTION: IF THE TEMPERATURE FUSE INDICATES AN OPEN CIRCUIT AT ROOM TEMPERATURE, REPLACE TEMPERATURE FUSE. F PRIMARY INTERLOCK SWITCH TEST 1. 2. 3. 4. 5. 6. 7. 8. G Disconnect the power supply cord, and then remove outer case. Open the door and block it open. Discharge high voltage capacitor.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 5. 6. 7. 8. I When the monitor switch actuator is pushed by a screw driver through the lower latch hole on the front plate of the oven cavity with the door opened (in this condition the plunger of the monitor switch is pushed in), the meter should indicate an open circuit. If improper operation is indicated, the switch may be defective.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST The following symptoms indicate a defective key unit. a) When touching the pads, a certain pad produces no signal at all. b) When touching a number pad, two figures or more are displayed. c) When touching the pads, sometimes a pad produces no signal. If the key unit is defective, replace the key unit. 2. Control Unit. The following symptoms indicate a defective control unit.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER L G8 G7 G6 G5 G4 G3 G2 G9 5 4 3 2 1 POWER LEVEL MINUTE PLUS G12 G11 G10 COMPONENT TEST 0 9 8 7 6 STOP CLEAR START HOT WATER DEFROST CENTER TASK LIGHT ACCENT LIGHT POPCORN REHEAT CENTER KEEP WARM TIMER CLOCK FROZEN FRESH FROZEN VEGETABLES VEGETABLES ENTREES BAKED POTATOES RICE GROUND MEAT G1 RELAY TEST 1. Disconnect the power supply cord, and then remove outer case.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST Menu Steaks/Chops 0.5lbs 1ST STAGE LEVEL TIME 60% 57sec. 2ND STAGE LEVEL TIME 40% 17sec. (8) If improper operation is indicated, the control unit is probably defective and should be checked. FOIL PATTERN ON THE PRINTED WIRING BOARD TEST To protect the electronic circuits, this model is provided with a fine foil pattern added to the primary on the PWB, this foil pattern acts as a fuse. 1. Foil pattern check and repairs.
R-1200 R-1201 TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST 8) 9) 10) 11) 12) 13) 14) Disconnect the power supply cord. Open the door and block it open. To discharge high voltage capacitor, wait for 60 seconds. Reconnect all leads removed from components during testing. Re-install the outer case (cabinet). Reconnect the power supply cord after the outer case is installed. Run the oven and check all functions.
R-1200 R-1201 DESCRIPTION OF LSI LSI The I/O signal of the LSI is detailed in the following table. Pin No. Signal I/O 1-2 VL2-VL1 IN 3-6 AN7-AN4 IN 7 AN3 OUT 8 AN2 IN 9-10 11-13 14 AN1-AN0 P57-P55 CNTR0 OUT OUT OUT Description Power source voltage input terminal. Standard voltage for LCD. Terminal to change cooking input according to the Model. By using the A/D converter contained in the LSI, DC voltage in accordance with the Model in operation is applied to set up its cooking constant.
R-1200 R-1201 Pin No. Signal I/O 30 XIN IN 31 XOUT OUT 32 VSS IN 33 P27 OUT 34 P26 OUT 35 P25 OUT 36 P24 OUT 37 P23 OUT 38 P22 OUT 39 P21 OUT 40 P20 OUT 41 P17 OUT 42 P16 OUT 43-47 48-50 51-72 P15-P11 OUT OUT OUT SEG24-SEG22 SEG21-SEG0 Description Internal clock oscillation frequency input setting. The internal clock frequency is set by inserting the ceramic filter oscillation circuit with respect to XOUT terminal.
R-1200 R-1201 Pin No. Signal I/O 73/74 75 76 77 VCC/VREF AVSS COM3 COM2 IN IN OUT OUT 78 COM1 OUT 79 COM0 OUT 80 VL3 IN Description Connected to GND. Connected to VC. Terminal not used. Common data signal: COM2. Connected to LCD signal COM2. Common data signal: COM1. Connected to LCD signal COM1. Common data signal: COM0. Connected to LCD signal COM0. Power source voltage input terminal. Standard voltage for LCD.
R-1200 R-1201 SERVICING 1. Precautions for Handling Electronic Components This unit uses CMOS LSI in the integral part of the circuits. When handling these parts, the following precautions should be strictly followed. CMOS LSI have extremely high impedance at its input and output terminals. For this reason, it is easily influenced by the surrounding high voltage power source, static electricity charge in clothes, etc. and sometimes it is not fully protected by the built-in protection circuit.
R-1200 R-1201 COMPONENT REPLACEMENT AND ADJUSTMENT PROCEDURE 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. Please follow the instructions below before operating the oven. 1.
R-1200 R-1201 cabinet) to the top cabinet. 5. While supporting the front of the oven, pull down the two (2) mounting levers and release the oven from the unit mounting plate. 6. Pull the power cord out of the wall cabinet and remove the oven. 7. The oven is now free and can be placed on the work surface selected for servicing the oven. 8. Installation is the reverse of this procedure. OUTER CASE REMOVAL 7. Nip the cord bushing with bushing pliers and release it from the outer case cabinet. 8.
R-1200 R-1201 10.Now, the high voltage rectifier assembly is free. 11.Remove capacitor from the holder. 12.Now, the high voltage capacitor is free. CAUTION: WHEN REPLACING THE HIGH VOLTAGE RECTIFIER ASSEMBLY, THE GROUND SIDE TERMINAL MUST BE SECURED FIRMLY WITH A GROUNDING SCREW. 6. Disconnect high voltage wire A from capacitor. 7. Remove the fan duct assembly from the oven cavity, referring to the procedure of "COOLING FAN MOTOR REMOVAL" 8.
R-1200 R-1201 6. Hold the fan duct to the magnetron with the one (1) screw. 7. Reconnect the wire leads to the fan motor, magnetron and high voltage capacitor, referring to the pictorial diagram. 8. Reinstall the wire leads to the hole of the fan duct. 9. Refer to procedure of "OUTER CASE REMOVAL". And reverse their procedure. And reinstall the outer case.
R-1200 R-1201 RIGHT PANEL ASSEMBLY AND POWER UNIT REMOVAL 7. Disconnect the connectors CN-A, CN-B and CN-C from the control unit. 8. Remove the right panel assembly from the oven. 9. Now, the right panel assembly is free. 10.Remove the two (2) screws holding the power unit to the right panel. 11.Release the two (2) tabs holding the power unit to the right panel. 12.Now, the power unit is free. 1. Disconnect the power supply cord. 2. Open the door and block it open. 3.
R-1200 R-1201 DOOR REPLACEMENT DOOR ASSEMBLY REMOVAL 1. Disconnect the power supply cord and remove the oven from wall and remove outer case. (Refer to procedure of "Removal of Oven from Wall" and "Outer case Removal") 2. Open the door and block it open. 3. To discharge the high voltage capacitor, wait for 60 seconds. 4. Disconnect the 9-pin wire harness from the power unit. 5. Release a snap band of the 9-pin wire harness from the hole on the base plate R. 6.
R-1200 R-1201 DOOR DISASSEMBLY 12.Releasing the two (2) lower tabs, remove the LSI unit with the LCD holder from the door frame assembly. 13.Disconnect the 9-pin wire harness from the LSI unit. 14.Releasing the two (2) tabs, release the LCD from the LCD holder. 15.Releasing the four (4) tabs, remove the LCD holder from the LSI unit. 16.Now the LSI unit is free. NOTE: For 9-pin wire harness 1.
1 2 3 30 BRN 1 ORG 3 RED 2 YLW 4 GRN 5 BLU 6 PPL 7 GRY 8 RY2: COM. N.O. N.O. T1 1 1 CN-A 5 4 5 2 N.O. CN-C IC1 8 G R Y 9 9 W H T (on the door) 2 3 4 5 6 7 R O Y G B P E R L R L P D G W N U L 1 LSI UNIT CN-G BRN COM. 5 GRY WHT WHT E BRN HOOD LAMP & SOCKET WHT GRN ORG HOOD LAMP & SOCKET WHT WHT Blue Marking to Base Plate Right GRN GRN TURNTABLE MOTOR Figure S-1. Pictorial Diagram MONITOR SWITCH COM.
R-1200 R-1201 2 1 4 3 6 5 A A T1 D2 b + – R1 240 1w (J1) C – c COM Q21 KRC243M RY1 N.O AC(H) COM MICRO RY2 E A3 HOOD LAMP COMMON A1 C3 INT C4 OVEN LAMP TURNTABLE MOTOR FAN MOTOR C6 BUZZER C5 MICRO C7 HOOD LAMP Q22 KRA101M RY3 E HOOD LAMP D24 1SS270A HOOD LAMP C D D23 1SS270A HOOD LAMP VA + D22 1SS270A D C2 R2 240 1w C21 10µ/35v D21 1SS270A N.O AC(N) OVEN LAMP TURNTABLE MOTOR FAN MOTOR GND R4 3.
C8 HOOD LAMP C9 C7 HOOD LAMP C5 C4 OVEN LAMP TURNTABLE MOTOR FAN MOTOR DOOR SENSING SWITCH C6 BUZZER MICRO. C3 INT C2 4 R40 4.7k C1 0.1µ/50v NOTE : R20 1k G F C20 0.1µ /50v : IF NOT SPECIFIED, 1/16W ± 5% R41 15k Q23 DTA143EKA Q22 DTA143EKA Q21 DTA143EKA Q30 DTA143EKA Q10 DTA143EKA R9 680 1/2w LD1 LD2 LD3 LD4 C10 0.1µ /50v VA R10 15k R1 82 C40 0.01µ /25v R3 4.7k C11 0.01µ/25v – + R5 15k R68 15k Q2 2SA1037AK R69 15k R4 1k UDZ4.3B ZD1 5 C3 0.01µ/25v R6 4.
R-1200 R-1201 1 2 4 3 5 6 A A B B CN - F 3 R53 1 DIP 8 R54 5 C50 R51 1 C 2 CN - C R4 11 1 CN - B E Q22 SP1 1 D20 B C51 4 2 IC-1 (J2) R52 R50 D40 C D21 C3 D 1 BFB ZD1 RY1 B 3 E C21 E Q21 D R2 R1 R5 R3 Q1 C2 C1 D2 D1 1 VRS1 E QKITPB036MRE0 E 5 P (J1) S F F 8 T1 5 LOT NO D4 D3 3 RY2 RY4 G CN - A D22 G D23 4 D24 1 RY3 H H Figure S-4.
R-1200 R-1201 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-1200 R-1201 ∆ REF. NO. 4- 8 4- 9 4-10 4-11 4-12 4-13 4-14 4-15 4-16 4-17 4-18 4-19 4-20 4-21 4-22 4-23 4-24 PART NO.
R-1200 R-1201 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 Order Parts from the authorized SHARP parts Distributor for your area. Defective parts requiring return should be returned as indicated in the Service Policy.
R-1200 R-1201 2 1 4 3 6 5 OVEN AND CABINET PARTS A A 4-10 7-3 7-5 1-12 2-3 4-12 4-1 7-5 7-5 B 7-8 7-1 B B 1-5 7-5 2-4 4-17 A 7-1 C C 4-16 4-17 7-2 4-13 6-10 7-8 4-3 7-1 D ;;;;;; ;;;;; ; ;;;; ;;;;; ;;;;;;;;; ;;;;; ;;;;;; ;;;;;;;;; ;B ;;;;;; ;;;;; ; ; ; ;;;;; ;;;; ;;;;;;; ; ; ;; ;;;;;; ; ;;;; 4-7 4-2 7-3 E D 1-3 7-5 7-1 7-1 4-4 1-6 1-2 4-16 4-20 7-7 7-4 4-13 4-11 1-1 A E 4-21 2-1 4-15 7-6 4-8 6-8 6-9 1-8 4-5 1-10 1-4 4-9 1-14 4-6 7-8 F 1-11 1-9
R-1200 R-1201 1 2 4 3 6 5 4-3 TURNTABLE TRAY PACKING AND ACCESSORIES A A TOP PAD SPADBB043MRE0 B C B 6-4 TOP & WALL TEMPLATE DOOR PROTECTOR SPADP0221MRE0 C 6-3 WRAP COVER SSAKH0103MRE0 OPERATION MANUAL 6-1 INSTALL MATERIAL ASSEMBLY D D ACCESSORY PACK SSAKAB004MRE0 E E BOTTOM PAD F F SPADBB044MRE0 Non-replaceable items G G PACKING CASE SPAKCB324MRR1 [R-1200] SPAKCB324MRR2 [R-1201] H H 1 2 4 3 5 6 COPYRIGHT © 2001 BY SHARP CORPORATION ALL RIGHTS RESERVED.
