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Calex CME20G Service Manual

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MICROWAVE OVEN
CME20G
SERVICE
Manual
CONTENTS
MICROWAVE OVEN
8. PCB Diagrams
CALEX

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Summary of Contents for Calex CME20G

  • Page 1: Table Of Contents

    MICROWAVE OVEN CME20G SERVICE Manual CONTENTS MICROWAVE OVEN 1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjustments 6. Troubleshooting 7. Exploded Views and Parts List 8. PCB Diagrams 9. Schematic Diagrams CALEX...
  • Page 2 PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TOAVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be (c) Before turning on microwave power for any service test or inspection operated with the door open. within the microwave generating (b) Make the following safety checks on compartments, check the magnetron,...

  • Page 3: Precaution

    1. Precaution Follow these special safety precautions. Although the microwave oven is completely safe during ordinary use, repair work can be extremely hazardous due to possible exposure to microwave radiation, as well as potentially lethal high voltages and currents. 1-1 Safety precautions ( 1.
  • Page 4 Pretaution 1-2 Special Servicing Precautions (Continued) 17. When checking the continuity of the switches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected. 18. Components that are critical for safety are indicated in the circuit diagram by shading, 19.

  • Page 5: Specifications

    2. Specifications 2-1 Table of Specifications MODEL CME20G ITEM TIMER 99 MINUTES 90 SECONDS POWER SOURCE 230V/50HZ, AC POWER CONSUMPTION MICROWAVE : 1,400W, GRILL : 1,100W OUTPUT POWER FROM100 TO850W (6 LEVEL POWER) (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz MAGNETRON...

  • Page 6: Operating Instructions

    3. Operating Instructions 3-1 Control Panel INSTANTREHEAT/ COOK SELECTION AUTO DEFROST Auto SELECTION WEIGHT SELECTION GRILL MODE SELECTION MICROWAVE MODE COMBI MODE SELECTION 1-2-3 SELECTION 10 s 10 min 1 min TIME SETTING STANDING TIME SETTING CLOCK SETTING START BUTTON STOP/CANCEL BUTTON + 30 s 3-2 Features &...

  • Page 7: Disassembly And Reassembly

    4. Disassembly and Reassembly 4-1 Replacement of Magnetron, Motor Assembly and Lamp Remove the magnetron including the shield case, Lamp Thermo S/W Cover Air permanent magnet, choke coils and capacitors (all of which are contained in one assembly). 1. Disconnect all lead wires from the magnetron and lamp.
  • Page 8 Disassembly and Reassembly 4-3 Replacement of Door Assembly 4-3-1 Removal of Door "C" Insert flat screwdriver into the gap between Door "A" and Door "C" to remove Door "C". Be careful Door "A" when handling Door "C" because it is fragile. Then remove the door assembly.
  • Page 9 Disassembly and Reassembly 4-3-5 Reassembly Test After replacement of the defective component parts of the door, reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage. 1. When mounting the door to the oven, be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment.
  • Page 10 Disassembly and Reassembly 4-6 Replacement of Control Circuit Board 4-6-1 Removal of Control Box Assembly 1. Be sure to ground any static electric charge in your body and never touch the control circuit. 2. Disconnect the connectors from the control Screw circuit board.

  • Page 11: Alignment And Adjustments

    5. Alignment and Adjustments PRECAUTION 1. High voltage is present at the high voltage terminals during any cook cycle. 2. It is neither necessary nor advisable to attempt measurement of the high voltage. 3. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the high voltage capacitor.
  • Page 12 Alignment and Adjustments 5-4 High Voltage Capacitor 1. Check continuity of the capacitor with the meter set at the highest resistance scale. 2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9MΩ. 3.
  • Page 13 Alignment and Adjustments 5-8 Output Power of Magnetron CAUTION MICROWAVE RADIATION PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY. The output power of the magnetron can be measured by performing a water temperature rise test. Equipment needed : * Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm) * One glass thermometer with mercury column...
  • Page 14 Alignment and Adjustments 5-10 Procedure for Measurement of Microwave Energy Leakage 1) Pour 275±15cc of 20±5˚C(68±9˚F) water in a beaker which is graduated to 600cc, and place the beaker in the center of the oven. 2) Start to operate the oven and measure the leakage by using a microwave energy survey meter.

  • Page 15: Troubleshooting

    6. Troubleshooting PRECAUTION 1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE. 2. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT. 3. DISCHARGE THE HIGH VOLTAGE CAPACITOR. 4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON.
  • Page 16 Troubleshooting 6-1 Electrical Malfunction(continued) SYMPTOM CAUSE CORRECTIONS Oven lamp and fan motor turn on 1. Misadjustment or loose wiring Adjust door and latch switches. of primary latch switch 2. Defective primary latch switch Oven can program but timer 1. Open or loose wiring of secondary Adjust door and interlock switches.

  • Page 17: Exploded Views And Parts List

    7. Exploded Views and Parts List 7-1 Exploded Views...
  • Page 18 2501-001104 C-OIL 1uF,2.1KV,BK,54x35x80,20 DE61-50106A BRACKET-HVC SECC,T0.8,W31,L125.8 DE61-40017A FOOT PP(A353),BLK,MW5630T DE59-00002A DIODE-H.V ESJC13-12B,12KV,MWO ALL,RING&FLAT TERMIN DE91-70061B ASSY-H.V.FUSE THV060T-0750-H,5KV0.75A,RED DE94-00089S ASSY DOOR CME20G(CE2733),PURE-WHT,CALEX DE94-00088E ASSY CONTROL-BOX CME20G(CE2733),PURE-WHT,CALEX DE74-20102B TRAY-COOKING GLASS,T5.0,PI288,780G,M745 DE92-90436C ASSY-GUIDE ROLLER MW4370W,D16.5,XAREX DE67-60075A COUPLER PPS,7G,BRN,M97G45 DE74-70071B RACK-WIRE MSWR3,PI3,PI230,HI80,SNC2 DE47-20032A THERMOSTAT...
  • Page 19 Exploded Views and Parts List 7-3 Door Parts List Ref. No. Parts No. Description Specification Q'ty Remarks DE64-40322S DOOR-A ABS,-,-,-,PURE-WHT,CME20G(CE2733),CALEX DE67-20186A SCREEN-DOOR SAN,T2.2,W354,L224,SMOG,3RD-0.7CU.FT DE92-50133F ASSY DOOR-E CE2733(3RD-0.7),BLK-CAOTING,-,2ND-HINGE DE64-40008B DOOR-C PP,T1.5,BLK,CE745G DE64-40006F DOOR-KEY POM(F20-02),-,-,12G,BLK,MW7897G,NO-TALK DE61-70033A SPRING-KEY ES,HSWR10,PI0.6,D6.0,L22.3,BLU DE61-80004A HINGE-LOWER SCP1,T2.3,ZN-COATING,M745 DE61-80005A HINGE-UPPER SCP1,T2.3,ZN-COATIN,M745...
  • Page 20 Exploded Views and Parts List 7-6 Standard Parts List Parts No. Description Specification Q'ty Remarks DE60-10012A SCREW-TAP TITE TH,+,3,M4,L10,SWR10,ZPC2,TOOTH P-CORD DE60-10012A SCREW-TAP TITE TH,+,3,M4,L10,SWR10,ZPC2,TOOTH PCB-GND DE60-10018A SCREW-ASSY MACHINE PH,M4X0.7P,8,MSWR10,SN1,WS BKT-HEATER DE60-10045A SCREW-TAP PH PH,M3,L6,FEFZY GRL-TCO DE60-10080A SCREW-WASHER M5,L12,2S DE60-10080A SCREW-WASHER M5,L12,2S DE60-10082H SCREW-A...
  • Page 21 8. P.C.B Diagrams 8-1 P.C.B Diagrams...
  • Page 22 P.C.B Diagrams 8-2 P.C.B Parts List Parts No. Description Specification Q'ty Remarks 3501-001050 RELAY-MINIATURE 24VDC,200mW,5A,1FormA,10mS,5mS RY02,RY03 3501-001062 RELAY-POWER 24VDC,523.2mW,16A,1FormA,15mS, RY01 3501-001068 RELAY-POWER 24Vdc,523mW,16A,1FormA,15mS,10 RY04 3601-001126 FUSE-FERRULE 250V,1.6A,FA,CERAMIC,5X20MM FUSE 3708-000528 CONNECTOR-FPC/FC/PIC 13P,2.54mm,STRAIGHT,SN CN05 DE26-20146A TRANS-L.V SLV-745EN,230V,50HZ,AC17/7V LVT1 DE30-20016A BUZZER CBE2220BA,STICK BUZ1 DE47-40024A HOLDER-FUSE FH-51H,7.5A FUSE...

  • Page 23: Schematic Diagrams

    9. Schematic Diagrams 9-1 Schematic Diagrams CONDITION OF OVEN DOOR IS OPENED 1.INPUT : 230V COOK OFF 2.DOOR : OPEN 3.LAMP : ON WIRING COLOR : P.C.B PATTERN : P.C.B IN/OUT POINT BRN : BROWN BLU : BLUE WHT : WHITE ORG : ORANGE RED : RED YEL : YELLOW...