MICROWAVE OVEN CM1319 / CM1329 CM1619 / CM1629 CM1919 / CM1929 SERVICE Manual MICROWAVE OVEN CONTENTS 1. Precaution 2. Specifications 3. Operating Instructions 4. Disassembly and Reassembly 5. Alignment and Adjustments 6. Troubleshooting 7. Exploded Views and Parts List 8. Schematic Diagrams 9.
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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 (c) Before turning on microwave power operated with the door open. for any service test or inspection within (b) Make the following safety checks on the microwave generating all ovens to be serviced before activating...
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.
1-2 Special High Voltage Precautions 1. High Voltage Warning Do not attempt to measure any of the high Discharge the 2 High Voltage Capacitors voltages --this includes the filament voltage before servicing! of the magnetron. High voltage is present during any cook cycle. Before touching any components or wiring, always unplug the oven and discharge the high voltage capacitor (See Figure 1-1)
3. Operating Instructions 3-1 Features (CM1319/CM1619/CM1919) VARIABLE COOKING POWER CONTROL DIAL OVEN LAMP (230V 25W) TIMER DIAL +20sec PAD DISPLAY STOP/CANCEL PAD OVEN LAMP COVER START BUTTON CEILING COVER DOOR HANDLE SAFETY INTERLOCK HOLES DOOR PLATE TRAY DOOR LATCHES AIR FILTER...
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3-3 Control Panel (CM1329 / CM1629 / CM1929) + 20sec 1. DISPLAY 2. PROGRAM PAD 3. PROGRAM LOCK PAD 4. NUMBER PADS(TIME, MEMORY PROGRAMMING) 5. POWER LEVEL SELECTOR PAD 6. DEFROST SELECTOR PAD 7. DOUBLE QUANTITY PAD 8. +20sec PAD (ONE TOUCH COOK PAD) 9.
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3-5. Operation Guide (CM1919/CM1619/CM1319) Cooking/Reheating 1. Make sure the oven is plugged into a properly earthed electrical outlet and ’ON’ appears in the display window. 2. Open the door. The oven lamp will be turned on. 3. Put the food into a suitable container, place it in the center of the oven and then close the door securely.
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3-5. Operation Guide (CM1919/CM1619/CM1319) To stop the cooking You can stop cooking at any time so that you can: Á Check the food Á Turn the food over or stir it Á Leave it to stand * Temporarily ; Open the door or press button once.
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3-3 Operation Guide (CM1929/CM1629/CM1329) One-stage cooking This oven is preset at the factory for automatic operation. Make sure the oven is plugged into a properly earthed electrical outlet and ’ON’ appears in the display window. Open the door (The oven lamp will be turned on.). Put the food into a suitable container, place it in the centre of the oven and then close the door securely (The oven lamp will go off.).
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3-3 Operation Guide (CM1929/CM1629/CM1329) Multi-stage cooking 1. Select the desired power level by pressing the POWER LEVEL Selector pad or DEFROST pad. Result : The selected power level will be displayed in the display window. 2. Set the desired heating time by pressing the NUMBER pads. Result : The selected time is displayed in the display window.
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3-3 Operation Guide (CM1929/CM1629/CM1329) Using the Defrost Feature NOTE : When the oven was operating for longer than 25 min under Defrosting cycle, you can NOT change the power level from Defrosting to Heating(Cooking/Reheating) mode. NOTE : The oven is designed not to work when power level is set to 0 mode between the heating mode and the defrosting mode.
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3-3 Operation Guide (CM1929/CM1629/CM1329) One-stage 1. Hold down PROGRAM LOCK( ) and then press PROGRAM ( ) pad. Hold together for 2 sec. * Be sure to press the pads firmly. Result : PROG indicator appears in the digital display. 2.
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3-3 Operation Guide (CM1929/CM1629/CM1329) Multi-stage 1. Hold down PROGRAM LOCK( ) and then press PROGRAM( ) pad. Hold together for 2 sec. * Be sure to press the pads firmly. Result : PROG indicator appears in the digital display. 2. Press appropriate NUMBER pad for the desired memory number. Result : Selected memory program code appears below the PROGRAM indicator.
If you want to cancel any cooking settings before starting cooking, simply press CANCEL pad once. Power Levels and Time Variations (CM1919/1929/CM1619/1629/CM1319/1329) The power level function enables you to adapt the amount of energy dissipated and thus the time required to cook or reheat your food, according to its type and quantity.
4. Disassembly and Reassembly 4-1 Replacement of Magnetron Remove the magnetron including the shield case, permanent magnet, choke coils and capacitor (all of which are contained in one assembly). Duct-MGT-L 1. Remove the outer panel. Nut-Flange Duct-Fan NOTE : Before servicing, make sure to discharge electric charge remaining on the high voltage capacitors or wait for more than 5 min.
4-3 Replacement of Door Assembly 4-3-1 Removal of Door Assembly NOTE : Be sure to wear gloves when you disassemble or assemble the parts. 1. Remove hex bolts securing the upper hinge and lower hinge. Then remove the door assembly. 2.
4-4 Replacement of Fuse and H.V.Fuse 1. Disconnect the oven from the power source. 2. Remove defective fuse from Noise filter. 3. When replacing the fuse, be sure to use an exact replacement part. If new fuse blows out again after replacement, check the primary interlock switch, door sensing switch and interlock monitor switch.
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4-6 Replacement of Control Box Assy and P.C.Board 4-6-1 Removal of Control Box Assembly 1. Be sure to discharge any static electric charge built up on your body and avoid touching the touch control circuitry. 2. Remove 3 screws securing the Control Box Ass’y to the oven cavity. 3.
4-7 Replacement of Fan Motor 1. Remove the outer panel and back-cover. Ventilation Motor 2. Discharge the high voltage capacitor. 3. Remove all the lead wires from Magnetron and High Voltage Capacitor. 4. Remove 2 screws securing the duct fan. 5.
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4-10 Replacement of Air Filter 1. Pull out the spacer pins at both ends of the Air Filter. Then the locking clamps inside are released. 2. Lift the Air Filter off the post carefully. Note : Spacer pins are not detachable from the Air Filter. Plastic Spacer Pins 4-11 Replacement of High Voltage Capacitor NOTE : It is not necessary to remove Magnetron in...
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.
5-5 High Voltage Diode 1. Isolate the diode from the circuit by disconnecting its leads. 2. With the ohm-meter set at the highest resistance scale, measure across the diode terminals. Reverse the meter leads and read the resistance. A meter with 6V, 9V or higher voltage batteries should be used to check the front-to back resistance of the diode (otherwise an infinite resistance may be read in both directions).
1000 : Water (cc) * 22 : CM1919/1929(1900W) T : Temperature Rise (T2-T1) * 26 : CM1619/1629(1600W) MC : Cylindrical borosilicate glass weight * 32 : CM1319/1329(1300W) : Room temperature 7. Normal temperature rise for this model is 9 to 11 at ’HIGH’.
5-10 Check for Microwave Leakage 5-10-1 Procedure for Measurement of Microwave Energy Leakage 1) Pour 275 ?5cc of 20 ( 68 F 9 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.
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 LEAD WIRES FROM THESE PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON.
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6-1 Electrical Malfunction(continued) SYMPTOM CAUSE CORRECTIONS Oven lamp goes off 1. Loose lead wire or open lamp Tighten lamp lead wire or replace filament with a new lamp 1. Misadjustment of latch switch 2. Defective primary latch switch Microwave output is low;. Consult electrician.
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6-2 Error Codes & Corrections Code Cause Corrections 1. Improper input power freqency. Check if power frequency is 50Hz. 2. Defective Ass’y Main P.C.B Replace Ass’y Main P.C.B or MICOM 1. Overheating inside cavity Check if the oven was operating without load or (no load or little load aging) too little load and plug the power cord in again.
2 is 30 seconds. The relation between indications on the display window and the output power of the microwave oven is as shown in figure below. CM1919/CM1929 CM1619/CM1629 CM1319/CM1329 20% opt open-7sec(8sec) 25% opt short-9sec(6sec) 30% opt short-10sec(5sec) c(d):...
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9-2 Description of Operating Sequence (continued) Initial operating status of Power Relay when the START button is pressed. Relays are designed to work as shown in the figure below. When the oven is set to DEFROST power position, Inrush Relay1 and Power Relay1 are programmed to work with Inrush Relay2 and Power Relay2 not simultaneously but alternately.
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9-2 Description of Operating Sequence (continued) High Voltage Transformer input power sensing circuitry Refers to the circuitry that detects and check if the input power is correctly supplied to the primary terminal of High Voltage Transformer when the microwave oven is operating. If any abnormal condition(eg.