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MICROWAVE OVEN
CE745GR
Manual
SERVICE
CONTENTS
MICROWAVE OVEN
1. Precaution
2. Specifications
3. Operating Instructions
4. Disassembly and Reassembly
5. Alignment and Adjustments
Auto Auto
lbs. oz.
kg g
1-2-3
h min
10min 1min 10s.
6. Troubleshooting
1min+
CE745GR
GRILL
7. Exploded Views and Parts List
8. PCB Diagrams
9. Schematic Diagrams
BWT
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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 operated (c) Before turning on microwave power for any with the door open. service test or inspection within the microwave (b) Make the following safety checks on all ovens generating compartments, check the magnetron, to be serviced before activating the magnetron wave guide or transmission line, and cavity for or other microwave source, and
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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. All repairs should be done in accordance 11. If the fuse is blown by the Interlock Monitor with the procedures described in this Switch: Replace all of the following at the manual. This produ
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Pretaution 1-2 Special Servicing Precautions (Continued) 16. When checking the continuity of the witches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected. 17. Components that are critical for safety are indicated in the circuit diagram by shading, or . 18. Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety c
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2. Specifications 2-1 Table of Specifications MODEL CE745GR ITEM TIMER 99 MINUTES 90 SECONDS POWER SOURCE 230V/50HZ, AC POWER CONSUMPTION MICROWAVE : 1,400W,GRILL : 1100W OUTPUT POWER FROM85 TO 850W (10 LEVEL POWER) (IEC-705 TEST PROCEDURE) OPERATING FREQUENCY 2,450MHz MAGNETRON OM75PH(31) COOLING METHOD COOLING FAN MOTOR 1 27 3 OUTSIDE DIMENSIONS 19 / "(W) x 10 / "(H) x 14 / "(D) 4 32 8 NET WEIGHT 36.3 LBS. SHIPPING WEIGHT 39.6 LBS. 2-2 Comparison Chart MODEL CE745GR FEATURE MORE/LESS O AUTO R
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3. Operating Instructions 3-1 Control Panel Instant Cook Button Auto Defrost Butten Auto Cook Button Auto Auto Kg,g Button More/Less Button lbs. oz. Clock Setting Button kg g Power Level Selection Button Grill Button Hold/Timer Button Combi Button 1-2-3 h min Memory Button 10min 1min 10s. Timer Setting Button 1min+ Stop Button Start/Boost Button CE745GR 3-2 Features & External Views Ventilation Slot Light Door Safety Interlock Holes
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4. Disassembly and Reassembly 4-1 Replacement of Magnetron, Motor Assembly and Lamp Remove the magnetron including the shield case, Cover Air permanent magnet, choke coils and 500pF capacitors (all of which are contained in one Thermo S/W Lamp assembly). 1. Disconnect all lead wires from the magnetron Fan Motor and lamp. BKT-Mountain 2. Remove the bracket mounting. 3. Remove the air cover. 4. Remove screws securing the magnetron to the wave guide. 5. Take out the magnetron very carefully. 6. Rem
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Disassembly and Reassembly 4-3 Replacement of Door Assembly 4-3-1 Removal of Door Assembly Remove screws securing the upper hinge and lower hinge. Then remove the door assembly. Upper Hinge Screw Lower Hinge Screw 4-3-2 Removal of Door "C" Insert flat screwdriver into the gap between Door Door "C" "A" and Door "C" to remove Door "C". Be careful when handling Door "C" because it is fragile. Door "A" 4-3-3 Removal of Door "E" Following the procedure as shown in the figure, Door "E" insert and bend
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Disassembly and Reassembly 4-3-4 Removal of Key Door & Spring 1. Remove pin hinge from Door "E" Detach spring from Door "E" and key door. Door "E" 2. 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. 3. 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 low
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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. 3. Remove screws securing the control box assembly. 4. Remove the screw securing the ground tail of Control Box the keyboard. 4-6-2 Removal of P.C.B Assembly 1. Pull the lever end of the plastic fastener and remove the Flexible P
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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. 5-1 High Voltage Transformer 1. Remove connectors from the transformer terminals Filament Terminals and check continuity. 2. Normal resistance readings are
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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. A shorted capacitor will show continuous continuity. 4. An open capacitor will show constant 9MΩ. 5. Resistance between each terminal and chassis should read infinite. 5-5 High Voltage Diode 1. Isolate the diode from the circuit by disconnecti
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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 NOTE: Check line voltage under load. Low voltage wil
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Alignment and Adjustments 5-10 Microwave Heat Distribution - Heat Evenness The microwave heat distribution can be checked indirectly by measuring the water temperature rise at certain positions in the oven: 1. Prepare five beakers made of 'Pyrex', having 100 milliliters capacity each. 2. Measure exactly 100milliliters off water load with a measuring cylinder, and pour into each beaker. 3. Measure the temperature of each water load. (Readings shall be taken to the first place of decimals.) 4. Put
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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. TO DO OTHERWISE MAY RESULT IN A FALSE READING OR DAMAGE TO YOUR METER. 5. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT
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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. does not start. interlock switch 2. Off-alignment of primary interlock 3. Defective secondary interlock S/W Microwave output is low;. 1. Decrease in power source vol
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7. Exploded Views and Parts List 7-1 Exploded Views D5 M1 M3 D1 M2 D7 M13 D4 M12 M6 M4 D6 M35 M7 D2 M9 M5 D3 M10 M8 M11 M36 M34 M14 M37 M16 M15 M17 M33 M20 M18 M21 M32 M22 B2 M19 M31 B1 M30 B3 M27 M38 M29 B5 B4 M24 M23 C4 M26 C3 C5 C6 M25 M43 M28 C1 M39 C2 M44 M42 M40 M41 Samsung Electronics 7-1
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Exploded Views and Parts List 7-2 Main Parts List Ref. No. Parts No. Description/Specification Q'ty Remarks OLD PARTS NO. M 1 DE70-30032X PANEL-OUTER;T0.6 W351.2 L1010 WHT-COATIN 1 M 2 DE63-90150A CUSHION-RUBBER;DFA20 T2 W100 L140 BLK 1 M 3 DE61-50323A BRACKET-UPPER;ALSTAR T0.6 W385 L205 M624 1 73011-0243-00 M 4 DE61-30008A SUPPORTER-HEATER;ALUMINA T12 CE745G 1 M 5 DE61-70060A SPRING-PLATE;SK-5 T0.5 1 76674-232-810 M 6 DE47-70072A HEATER
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Exploded Views and Parts List 7-3 Door Parts List Ref. No. Parts No. Description/Specification Q'ty Remarks Old Parts No. D 1 DE64-40007A DOOR-A;ABS(VH-080) T3.0 WHT 1 D 2 DE64-40006A DOOR-KEY;POM(TC3005) T2.0 12GR BLK CE9 1 D 3 DE61-70033A SPRING-KEY;ES HSWR10 PI0.6 D6.0 L22.3 BL 1 72724-0040-00 D 4 DE67-20004D SCREEN-DOOR;PC T1.5 W173.6 L373.5 WHT CE 1 D 5 DE92-50126B ASSY DOOR-E;COATING BLK CE745G 1 D 6 DE64-40008B DOOR-C;PP T1.5 W L G
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Exploded Views and Parts List 7-6 Standard Parts List Parts No. Description / Specification Q'ty Remarks Old Parts No. DE60-10012A SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2 1 NO-FIL 70504-0002-00 DE60-10012A SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2 1 P-CO-E 70504-0002-00 DE60-10012A SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2 2 HI-UPP 70504-0002-00 DE60-10122A SCREW-TAP TH;TAP TH 2-4X8 FE FN 2 C-CEIL 77128-240-085 DE60-10122A SCREW-TAP TH;TAP TH 2-4X8 FE FN
