Danby DMW769BL Service Manual Download Page 1

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MICROWAVE OVEN

DMW769W / DMW769BL

DMW769W-1 / DMW769BL-1

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. PCB Diagrams

9. Schematic Diagrams

DANBY

Summary of Contents for DMW769BL

Page 1: ...69BL 1 SERVICEManual 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 PCB Diagrams 9 Schematic Diagrams DANBY ...

Page 2: ...ians should remove their watches while repairing an MWO 11 To avoid any possible radiation hazard replace parts in accordance with the wiring diagram Also use only the exact replacements for the following parts Primary and secondary interlock switches interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary and secondary...

Page 3: ...arged about 30 seconds after disconnection Short the negative terminal of the high voltage capacitor to the oven chassis Use a screwdriver 3 High voltage is maintained within specified limits by close tolerance safety related components and adjustments If the high voltage exceeds the specified limits check each of the special components 1 2 Pretaution 1 2 Special Servicing Precautions Continued 1 ...

Page 4: ...2 450MHz MAGNETRON OM75SH 31 COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 198 32 W x 1026 32 H x 1325 32 D NET WEIGHT 27 6 LBS SHIPPING WEIGHT 30 9 LBS 2 2 Feature Chart MODEL FEATURE MORE LESS O AUTO REHEAT O TIME DEFROST DMW769W DMW769BL O AUTO DEFROST DMW769W 1 DMW769BL 1 O TIME COOK O POWER LEVEL O INSTANT COOK O MEMORY CHILD LOCK O CLOCK O SOUND O DEMO O LANGUANGE WEIGHT OPTION O KITCH...

Page 5: ...s power to level other than high Clock Sets current time Kitchen Timer More Less Button Increases or decreases cooking time Pause Canel Press to pause oven or correct a mistake Number Buttons Sets cooking times or amounts Start Instant Cook Buttons Instant setting to cook popular foods 3 2 Features External Views Door Ventilation Holes Light Safety Interlock Holes Control Panel Open Door Push Butt...

Page 6: ...el of fan motor assembly 6 Take out the fan motor assembly 7 Remove the oven lamp by pulling out from hole of air cover NOTE1 When removing the magnetron make sure that its antenna does not hit any adjacent parts or it may be damaged NOTE2 When replacing the magnetron be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition 1 Discharge the high ...

Page 7: ...tal plate between Door E and Door A until you hear the tick sound Insertion depth of the thin metal plate should be 0 5mm or less 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 fragile Then remove the door assembly 4 3 1 Removal of Door C 4 3 2 Removal of Door E Disassembly and Reassembly Door C Door A Door E Key Door S...

Page 8: ... and the coupler 7 When replacing the drive motor be sure to remount it in the correct position with the coupler 8 Connect all the leads to the drive motor 9 Screw the drive motor cover to the base plate with a screw driver 4 4 Replacement of Fuse 4 5 Replacement of Drive Motor Disassembly and Reassembly Screw Drive Motor Cover Base Plate Drive Motor 4 3 5 Reassembly Test After replacement of the ...

Page 9: ...ntrol box 4 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener 1 Window display should not be disassembled as its mounting tabs will be broken If repair work is difficult replace with Ass y control panel 2 The membrane key board is attached to the escutcheon base with doublefaced adhesive tape Therefore applying...

Page 10: ...e should read open 1 The low voltage transformer is located on the control circuit board 2 Remove the low voltage transformer from the PCB Ass y and check continuity 3 Normal resistor reading is shown in the table 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 touch...

Page 11: ...t the Latch Body by moving it so that the oven door will not have any play in it Check for play in the door by pulling the door assembly Make sure that the latch keys move smoothly after adjustment is completed Completely tighten the screws holding the Latch Body to the oven assembly 4 Reconnect to Monitor switch and check the continuity of the monitor circuit and all latch switches again by follo...

Page 12: ...er again with the thermometer and measure the temperature T2 5 Subtract T1 from T2 This will give you the water temperature rise DT 6 The output power is obtained by the following formula 7 Normal temperature rise for this model is 9 9ûC to 10 5ûC 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 temperat...

Page 13: ...a radiarion preventing device make a repair record for the measured values and keep the data 2 If the radiation leakage is more than 5 mW cm2 after determining that all parts are in good condition functioning properly and the identical parts are replaced as listed in this manual notift that fact to CENTRAL SERVICE CENTER 5 13 2 At least once a year have the microwave energy survey meter checked fo...

Page 14: ... 3 Defective monitor switch NOTE1 4 Shorted HVCapacitor 5 Shorted HVTransformer NOTE2 NOTE 1 All of these switches must be replaced at the same time refer to adjustment instructions Check continuity of power relay contacts and if it has continuity replace power relay also NOTE 2 When HVTransformer is replaced check diode and magnetron also Oven does not accept 1 Key input is not in Sequence Refer ...

Page 15: ...an and fan motor Tighten screws of fan motor 2 Loose screws on H V Transformer Tighten screws of H V Transformer 3 Shorted H V Diode Replace H V Diode Turntable motor does not rotate 1 Open or loose wiring of turntable motor Check the wire of turntable motor 2 Defective turntable motor Replace turntable motor Oven stops operation during cooking 1 Open or loose wiring of primary Adjust door and lat...

Page 16: ...xploded Views and Parts List 7 1 Exploded Views 7 1 M1 M2 M21 M22 M23 C1 C2 C3 C4 C5 C6 M24 D1 D2 D3 D5 D6 M11 M26 M13 M14 M15 M12 M16 M17 M18 M19 M20 M3 M25 M27 M4 M5 M6 M7 M8 M9 M10 B1 B2 B4 B3 D4 D7 C7 ...

Page 17: ...DOOR PP TB53 GH10 T2 5 W31X100 5 12G NTR 3RD W 1 M12 DE26 10156A TRANS H V SHV 4593UC 120V 2015V 3 10V 60 1 M13 2501 001018 C OIL 800nF 2100V BK 35X54X70 20mm 1 M14 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M15 DE59 40001A DIODE H V HVR 1X 32B 12 1 M16 DE74 20102B TRAY COOKING GLASS T5 0 PI288 780G M745 1 M17 DE92 90436C ASSY GUIDE ROLLER MW4370W D16 5 XAREX 1 M18 DE67 60075A COUPLER PPS 7G B...

Page 18: ...EN DOOR SAN T2 2 W354 L224 SMOG 3RD 0 7CU FT 1 D 5 DE92 50133C ASSY DOOR E MW4593G BLK 3RD 0 7 1 D 6 DE64 40008B DOOR C PP T1 5 BLK CE745G 1 D 7 DE01 00112A FILM DOOR PET T0 15 W150 L268 NTR 3RD W 1 Ref No Parts No Description Specification Q ty Remarks C 1 DE66 00002A BUTTON PUSH ABS 1 C 2 DE61 70076A SPRING BUTTON HSWR PI0 6 1 C 3 DE34 00019A SWITCH MEMBRANE PET DMW769W 120V60HZ DANBY 1 DMW769W ...

Page 19: ...REW A 2S 4X12 TOOTHED 2 OUT PA DE60 10082H SCREW A 2S 4X12 TOOTHED 1 P CORD DE60 10082H SCREW A 2S 4X12 TOOTHED 1 PCB GND DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 2 G MOTOR DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 2 TCO DE60 10122A SCREW TAP TH TAP TH 2 4X8 FE FN 1 OUT PA DE60 10195A SCREW STAR POLE TH 2 4 12 SWCH18A ZNC 2 DE60 30016A NUT FLANGE M4 MSWR1...

Page 20: ...8 P C B Diagrams 8 1 P C B Diagrams 8 1 ...

Page 21: ...9 C10 C11 C12 P20 2401 000151 C AL 1000uF 20 25V GP TP 12 5x20 5 1 C02 P21 2401 000244 C AL 100uF 20 10V GP TP 6 3x7 5 1 C04 P22 2401 000466 C AL 10uF 20 35V GP TP 5x7 5 1 C08 P23 2401 000914 C AL 22uF 20 16V GP TP 5x11 5 1 C05 C07 P24 2401 002075 C AL 4 7uF 20 50V GP TP 5x11 5 1 C06 P25 2401 002598 C AL 220uF 20 50V GP TP 10x16 5 1 C01 P26 2503 001014 C NETWORK 1nFx7 80 20 50V 1 AC01 P27 2802 000...

Page 22: ...YEL YELLOW BLU BLUE ORG ORANGE G GREEN MGT TCO COM COM NC 120V 120V 130V 40W 21V 0V NO L FM DM ASSY CHOKE P C B FUSE WHT G G GND GND C 1 C 3 C2 0 9mH 500K 2200pF 2200pF BLK BLK BLK WHT RED WHT WHT BLK BLU ORG NO COM NO COM ORG NO COM NC COM DOOR SENSING SWITCH SECONDARY INTERLOCK SWITCH INTERLOCK MONITOR SWITCH PRIMARY INTERLOCK SWITCH CON1 R R R R ORG ORG WHT RED WHT MAGNETRON HIGH VOLTAGE DIODE ...

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