Sanyo EM C120 1 User Manual To The 2f2658e7 B806 4657 B241 8c6004f85999
User Manual: Sanyo EM-C120 to the manual
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SUPPLEMENT OF SERVICE MANUAL Microwave Oven EM-C160US SERVICE MANUAL SUPPLEMENT for Model EM-C120 Microwave Oven PRODUCT CODE NO. 437-453-00 See the Service Manual of EM-C180US(SM-640179) except the items described in this Service Manual. CAUTION WARNING TO SERVICE TECHNICIANS 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. (b) Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary: (1)Interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse. (c) Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections. (d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner. (e)(i) A microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner. (For U.S.A) (e)(ii) A microwave leakage check to verify compliance with the Canadian Regulation, HEALTH AND WELFARE, SOR/79-920 should be performed on each oven prior to release to the owner. (For CANADA) REFERENCE NO.SM-640180 FORM # EM-C120 (02/05) CAUTION For microwave energy emission On every service call. A check for microwave energy emission must be made according to the following manner. Measurement of energy emission Measurement must be made with the microwave oven operating at its maximum output and containing a load of 275 ±15 milliliters of tap water initially at 20°± 5° celsius (68±9°F) placed within the cavity at the center. NOTE:The water container must be a 600 milliliter beaker and made of an electrically none conductive material such as glass or plastic. The cook tray must be in place when measuring emission. A properly operating door and seal assembly will normally register emission no greater than 4 mW/cm2 to allow for measurement uncertainty with the cooking shelf or tray in place. All repairs must be performed in such a manner that microwave energy emission is minimal. Follow the instructions supplied with the detector being used and perform an R.F. emission test around the door front, and all edges and vent of the outer case. The cabinet (wrapper) must be in place and the oven fully assembled. When performing an emission survey, with the meter on FAST RESPONCE, the movemtnt of detector probe shall not exceed one (1) inch per second. In the area emitting the highest reading, switch the meter to SLOW RESPONSE and take a reading for minimum of three (3) seconds. We recommended the pattern outline shown below when the door surface is surveyed. NOTE: Periodically check to be sure that the probe tip is not worn or dirty. The following U.S. standard applies to microwave ovens: 21 CFR 1030.10, Performance Standard for Microwave Ovens. It requires that the power density of the microwave radiation emitted by a microwave oven shall not exceed five (5) milliwatts per square centimeter at any point 5 centimeters (about 2 inches) or more from the external surface of the oven. All microwave ovens exceeding the emission level of 4 mW/cm2 must be reported to Dept. of Service for microwave ovens and the manufacturer immediately . The owner should be told not to use the microwave oven until it has been repaired completely. If a microwave oven is found to operate with the door open, report to Dept. of Service, the manufacturer and CDRH* immediately. Also tell the owner not to use the oven. *CDRH: Center for Device and Radiological Health. The interlock monitor switch acts as the final safety switch protecting the customer from microwave radiation. If the interlock monitor switch operates properly and the door interlocs switch fails, the fuse will blow. If this happens, all interlock switches must be replaced. The contacts of the interlock switches may be welded together. Power output Measurement ...................................... 1 Precautions and Repair Service Tips ....................... 1 Circuit Diagram ......................................................... 2 Test Procedures ............................................3 Disassembly Instructions............................... 3 •`4 Exploded View and Parts List......................... 5 •`12 Overall Circuit Diagram.................................13 •`16 1. SPECIFICATIONS 2. POWER OUTPUT MEASUREMENT Microwave output ................ 1,200W to 120W Frequency ........................... 2,450MHz Power supply ....................... 120V, 60Hz Rated current ...................... 15 Amp. Safety Device ...................... Thermal protector(Magnetron) 150°C(270°F) Open (Thermostat) 80°C(144°F)Close Thermistor (Magnetron) 200°C(360°F) Open 108°C(194°F)Close Thermistor(Duct)................120°C(216°F) Open Fuse (Cartridge Type) ................. 250V 10A Micro switch, Relay Interlock Switch Interlock monitor Switch Door sensing Switch and Relay RL-3 and RL-4 Max. input time .................... Electronic Digital, up to Manual 10min./Memory 30min. Overall Dimensions ........ 422(W)x540(D)x335(H) mm Oven cavity size ............ 330(W)x330(D)x230(H) mm Effective Capacity of Oven Cavity.........19.1liters Net weight ........................... 29Kg NOTE: The power output specification, 1200W on this model is measured with IEC measurement. The power output is measured with two(2) liters water is equivalent to 1200W in measurement with IEC, when measured with the following power output. (1)1. Fill two beakers, one liter of tap water respectively 2. Use an accurate thermometer and measure each water temperature respectively. (2) Place beakers side by side in center of the ceramic tray. (3) Close the door,set the “TIME” for two minutes. Touch the “START” key and heat the water for exactly two minutes. (4)Take the beakers out, immediately stir the water and measure the water temperatures respectively. (5) Calculate the temperatures rise of water in each beaker. Then calculate the average value of the two temperature rises.(ƒ¢t) (6) The teperature rise shall be in the following range; Average Temp. Rise Minimum 15.4°C Maximum 18.8°C Power output is affected by the line voltage under load. (7) For correct Power output measurement, the line voltage under load must be 120±2 Volts. - 1 - 4. TEST PROCEDURES AND TROUBLESHOOTING PRIMARY CAUTION WINDINGS -DISCONNECT THE POWER SUPPLY CORD FROM THE WALL OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT. PROCEED WITH TESTS ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITORS AND REMOVING THE LEAD WIRES ON THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMERS FOR LOWER AND UPPER MAGNETRONS. Filament Windings (SEE FIGURE 3) A. TEST PROCEDURES COMPONENT HIGH-VOLTAGE TRANSFORMER Secondary Windings Figure 2 CHECKOUT PROCEDURE RESULT 1) Measure the resistance: With an ohm-meter on R x1 scale. a. Primary winding; b. Filament winding; c. Secondary winding; 2) Measure the resistance: with an ohm-meter on highest scale. a. Primary winding to ground; b. Filament winding to ground; Normal reading: Approximately 1.0 ohms Less than 1 ohm. Approximately 83 ohms Normal reading: Infinite ohms. Infinite ohms. Note: Remove varnish of measured point. Figure 3 5. DISASSEMBY INSTRUCTIONS F. CHANGING POWER SUPPLY CORD (See exploded view on page 5) (1) Unfasten 1 screw for ground and pull out the 2 wires of the power cord from the terminal plate. (2) Remove 1 screw for the bottom bracket of the cord bushing. (3) Install the new power supply cord with the reverse procedure of above (1) to (2). WARNING: For changing the power supply cord, never use other than the following. Key No. Order No. 5 617 140 1561 6 617 140 1332 7 617 140 1349 Parts Name Power cord Ass’y Cord bush Bottom bracket - 3 - Maintenance: The microwave ovens are designed, manufactured, and tested for years of dependable operation. However, the oven may require service from time to time if the consumable components listed below are not replaced at the appropriate time. For protection from unexpected service calls and undue inconvenience, we recommend that the user has the listed parts replaced at the intervals below, (at customer cost). This will avoid the trouble of repeated service calls after the expiration of the warranty period. Consumable components: When more than 1,250 hours of accumulative cooking time or more than 200,000 cycles of door opening/closing is observed by key operations, the following consumable components will be replaced. (Maintenance light in window display indicates when accumulative cooking time reaches 1,250 hours.) Light 1. Magnetron Tube, Part No. 415 002 7702 2. Printed Circuit Board-Relay, Part No. 617 137 3844 3. Switch base Assembly, Part No. 617 205 1208 4. Door Latch, part No. 617 068 1087 When more than 2,000 hours of accumulative cooking time is observed, the following consumable components should be replaced. 5. Blower motor, Part No. 617 140 1585 When slow rotating of blower motor is observed after removing dust from blower motor, blower motor must be replaced. 6. Door hinge, Part No. 617 120 3028 When a worn door hinge is observed and proper door adjustments can not be made, the door hinge must be replaced. 7. Door Assembly, Part No. 617 178 0734 When a worn door pin is observed and proper door adjustments can not be made, the door assembly must be replaced. - 4 - 6. EXPLODED VIEW AND PARTS LIST Main body Parts-1 NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a symbol. - 5 - NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a symbol. - 6 - Main body Parts-2 NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a symbol. - 8 - NOTE: All component have special characteristics for safety and must be replaced using parts listed in this manual. All service on M/W ovens should be performed by a qualified technician using approved testing equipment. Customers should not attempt replace component marked with a symbol. - 9 - Wiring of High voltage Circuit Upper Magnetron Red wire Lower Magnetron BACK Red wire Filament Winding Black Pink/Light Blue Red wire Lower Transformer Blue/Blue Filament Winding FRONT Brown Upper Transformer Red wire Wiring of Switches Upper Capacitor Monitor switch Brown(C Inside) White (NO) Light Blue (NC) Orange(C) Blue(NC Inside) Pink(NO Insde) Brown Orange White/ Black Yellow Interlock switch Purple Purple Door sensing switch - 16 - Lower Capacitor Viewed from back
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