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Samsung CE745GR manual

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Table of contents for the manual

  • Page 1

    MICROW A VE OVEN CE745GR SERVICE Manual MICROWA VE 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. PCB Diagrams 9. Schematic Diagrams BWT GRILL CE745GR lbs . kg oz. g 1min+ h 10min min 1min 1-2-3 Auto Auto 10s .[...]

  • Page 2

    Samsung Electronics (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 othe[...]

  • Page 3

    1. Precaution 1-1 Safety precautions ( ) Samsung Electronics 1-1 1. All repairs should be done in accordance with the procedures described in this manual. This product complies with Federal Performance Standard 21 CFR Subchapter J (DHHS). 2. Pacemaker wearers must consult a physician before attempting to service an MWO. 8. Notify the Central Servic[...]

  • Page 4

    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[...]

  • Page 5

    2. Specifications 2-1 T able of Specifications Samsung Electronics 2-1 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 O[...]

  • Page 6

    CE745GR lbs . kg oz. g 1min+ h 10min min 1min 1-2-3 A uto Auto 10s . Auto Defrost Butten Kg,g Button Power Level Selection Button Memory Button Hold/Timer Button Stop Button Start/Boost Button Timer Setting Button Grill Button Combi Button Clock Setting Button More/Less Button Auto Cook Button Instant Cook Button 3. Operating Instructions 3-1 Contr[...]

  • Page 7

    4. Disassembly and Reassembly 4-1 Replacement of Magnetron, Motor Assembly and Lamp Samsung Electronics 4-1 Remove the magnetron including the shield case, permanent magnet, choke coils and 500pF capacitors (all of which are contained in one assembly). 1. Disconnect all lead wires from the magnetron and lamp. 2. Remove the bracket mounting. 3. Remo[...]

  • Page 8

    4-3 Replacement of Door Assembly 4-3-1 Removal of Door Assembly 4-2 Samsung Electronics Remove screws securing the upper hinge and lower hinge. Then remove the door assembly. Insert flat screwdriver into the gap between Door "A" and Door "C" to remove Door "C". Be careful when handling Door "C" because it is [...]

  • Page 9

    4-3-4 Removal of Key Door & Spring Samsung Electronics 4-3 1. Remove pin hinge from Door "E" Detach spring from Door "E" and key door. 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 microwa[...]

  • Page 10

    4-6 Replacement of Control Circuit Board 4-6-1 Removal of Control Box Assembly 4-4 Samsung Electronics 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 circuit board. 3. Remove screws securing the control box assembly. 4. Remove the screw securing the gro[...]

  • Page 11

    Samsung Electronics 5. Alignment and Adjustments 5-1 High V oltage T ransformer 5-2 Low V oltage T ransformer 5-3 Magnetron 5-1 1. Remove connectors from the transformer terminals and check continuity. 2. Normal resistance readings are as follows: (Room temperature = 20ûC) 1. Continuity checks can indicate only an open filament or a shorted magnet[...]

  • Page 12

    Samsung Electronics 5-4 High V oltage Capacitor 5-5 High V oltage Diode 5-6 Main Relay and Power Control Relay 5-7 Adjustment of Primary Switch, Door Sensing Switch and Monitor Switch 5-2 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[...]

  • Page 13

    Samsung Electronics 5-3 7. Normal temperature rise for this model is 9ûC to 11ûC at 'HIGH'. NOTE 1: Variations or errors in the test procedure will cause a variance in the temperature rise. Additional power test should be made if temperature rise is marginal. NOTE 2: Output power in watts is computed by multiplying the temperature rise [...]

  • Page 14

    Samsung Electronics 5-4 Alignment and Adjustments 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[...]

  • Page 15

    Samsung Electronics 6. T roubleshooting 6-1 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[...]

  • Page 16

    Samsung Electronics 6-2 Troubleshooting 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 swi[...]

  • Page 17

    Samsung Electronics 7. Exploded V iews and Parts List 7-1 Exploded V iews 7-1 M1 M6 M30 M32 M38 C1 C2 C3 C4 C5 C6 M37 D1 D2 D3 D5 D6 M33 M34 M22 M26 M24 M25 M27 M28 M29 M3 M7 M8 M9 M10 M11 M4 M2 M14 M20 M5 M15 M18 M16 M17 M19 M21 B1 B2 B4 B3 B5 M12 D4 D7 M35 M36 M31 M39 M40 M41 M43 M42 M44 M23 M13[...]

  • Page 18

    7-2 Main Parts List 7-2 Samsung Electronics Exploded Views and 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 DE61-30[...]

  • Page 19

    Samsung Electronics 7-3 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[...]

  • Page 20

    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 77[...]

  • Page 21

    8. P .C.B Diagrams 8-1 P .C.B Diagrams Samsung Electronics 8-1[...]

  • Page 22

    8-2 Samsung Electronics Parts No. Description / Specification Q'ty Remarks 0401-001002 DIODE-SWITCHING;1N4148M,100V,200mA,500mW 16 D5~20 0402-000559 DIODE-RECTIFIER;D4G,400V,1A,T-1 3 D01,2,4 0501-000283 TR-SMALL SIGNAL;KSA539-Y,PNP,400mW,TO-92 1 TR01 0501-000388 TR-SMALL SIGNAL;KSC815-Y,NPN,400mW,TO-92 1 TR03 2001-000003 R-CARBON;330ohm,5%,1/8[...]

  • Page 23

    9. Schematic Diagrams 9-1 Schematic Diagrams 9-1 FM L BRN BRN ASSY CHOKE P.C.B MGT TCO BLK BLK FUSE BLU BLU BLU WHT WHT BLK PRIMARYS/W DOOR SENSING S/W FA F MAGNETRON NO COM NO COM NO NC BLK WHT BLK ORG ORG BLK BLK BLK BLK BLU COM MAIN RELAY POWER RELAY INRUSH RELAY GRILL RELAY DM HEATER L.V.TRANS MAIN RELAY D-MOTOR L.V.T DOOR SENSING SWITCH MONITO[...]