Samsung MR5491G Service Manual Download Page 1

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MICROWAVE OVEN

MR5491G / MR5492W

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

SEA

Summary of Contents for MR5491G

Page 1: ...VICEManual 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 SEA ...

Page 2: ...hes interlock monitor switch 12 If the fuse is blown by the Interlock Monitor Switch Replace all of the following at the same time Primary door sensing switch and power relay as well as the Interlock Monitor Switch The correct adjustment of these switches is described elsewhere in this manual Make sure that the fuse has the correct rating for the particular model being repaired 13 Design Alteratio...

Page 3: ...ive 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 Samsung Electronics 1 2 Special Servicing Precautions Continued 1 3 Special High Voltage Precautions PRE...

Page 4: ...ECONDS POWER SOURCE 120V 60HZ AC POWER CONSUMPTION MICROWAVE 1 400W OUTPUT POWER FROM 100W TO 1000W 10 LEVEL POWER IEC 705 TEST PROCEDURE OPERATING FREQUENCY 2 450MHz MAGNETRON OM75PH 31 ESS COOLING METHOD COOLING FAN MOTOR OUTSIDE DIMENSIONS 2011 32 W x 1111 32 H x 145 8 D NET WEIGHT 35 3 lbs SHIPPING WEIGHT 40 8 lbs ...

Page 5: ...uto Reheat Button Sets type of dish to be reheated Number Buttons Sets cooking times or amounts More Less Button Increases or decreases cooking time Auto Defrost Button Set weight of food to be defrosted Power Level Selection Button Sets power to level other than high Clock Button Sets current time Pause Canel Button Press to pause oven or correct a mistake 3 Operating Instructions 3 1 Control Pan...

Page 6: ...he correct position and make sure the gasket is in good condition CAUTION THIS OVEN WAS MANUFACTURED FOR USE IN A RECREATIONAL VEHICLE ONLY THIS OVEN REQUIRES INSTALLATION INTO A CABINET STRUCTURE ONLY THIS OVEN IS NOT DESIGNED FOR USE IN NON CABINET INSTALLATIONS OR FREESTANDING APPLICATIONS ADJACENT TO WITHIN 2 FEET OF ANY GAS OR ELECTRIC RANGE COOKTOP OR OVEN PLUG THE THREE PRONG POWER CORD INT...

Page 7: ...und 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 Door C Door A Door E Key Door Spring Door E 1 Discharge the high voltage capacitor 2 Disconnect all the leads 3 Remove t...

Page 8: ...s 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 2 Adjust so that the door has no play between ...

Page 9: ...cting 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 hot air such as using o...

Page 10: ...ase 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 tou...

Page 11: ...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 following the componen...

Page 12: ...ature rise is marginal NOTE 2 Output power in watts is computed by multiplying the temperature rise step 5 by a factor of 80 90 times the of centigrade temperature 4 187 x 1000 x DT 0 88xMcx T2 T0 Output Power 42 42 Heating Time sec 4 187 Coefficient for Water 1000 Water cc DT Temperature Rise T2 T1 Mc Cylindrical borosilicate glass weight To Room temperature 5 8 Output Power of Magnetron Alignmen...

Page 13: ... exhaust openings moving the probe in a clockwise direction at a rate of 1 inch sec If the leakage testing of the cabinet door seam is taken near a corner of the door keep the probe perpendicular to the areas making sure that the probe end at the base of the cone does not get closer than 5cm to any metal If it gets closer than 5cm erroneous readings may result 5 Measured leakage must be less than ...

Page 14: ... sensing switch 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 ...

Page 15: ...d 1 Loose fan 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 d...

Page 16: ...cs 7 Exploded Views and Parts List 7 1 Exploded Views 7 1 M1 I1 I4 M3 M2 M21 M22 M23 C1 C2 C3 C4 C5 C6 C7 M24 D1 D2 D3 D5 D6 M25 M26 I2 I3 M11 M13 M14 M15 M12 M16 M17 M18 M20 M19 M4 M5 M6 M7 M8 M9 M10 B1 B2 B4 B3 M27 D4 ...

Page 17: ...3RD W 1 M12 DE26 00019A TRANS H V SHV 5594UC 120V60HZ 2195V 3 60V DY 1 M13 2501 001105 C OIL 950nF 2 1KV BK 54x35x80 20 1 M14 DE61 50106A BRACKET HVC SECC T0 8 W31 L125 8 1 M15 DE91 70063A ASSY HVD V2M6 PI9 0 0 05MT 1 M16 DE74 20015B TRAY COOKING GLASS T6 0 PI318 1050G MW5630T 1 M17 DE92 90189P ASSY GUIDE ROLLER MW5896W 1 M18 DE67 60081A COUPLER PPS 3RD 1 0 1 3 1 M19 DE63 90035L CUSHION RUBBER T3 ...

Page 18: ... DE66 20010B BUTTON PUSH ABS D GRY 17 6G MW4371G 1 MR5491G C 1 DE66 20010A BUTTON PUSH ABS VH 080 WHT 17 6G MW4370W 1 MR5492W C 2 DE61 70076A SPRING BUTTON HSWR PI0 6 1 C 3 DE34 00013J SWITCH MEMBRANE PET MR5491G XAA 120V60HZ 1 MR5491G C 3 DE34 00013K SWITCH MEMBRANE PET MR5492W XAA 120V60HZ 1 MR5492W C 4 DE72 70161B CONTROL PANEL ABS VH0800 GRY MW5471G 1 MR5491G C 4 DE72 70161A CONTROL PANEL ABS ...

Page 19: ...8A ZPC2 GLD W 2 M DRIV DE60 10195A SCREW STAR POLE TH 2 4 12 SWCH18A ZNC 2 O PANEL DE60 10088A SCREW TAP PH PH M3 L8 FEFZY PLAIN 2 DE60 10098A SCREW ASSY TAP TITE PH TC M4X8 SWRCH18A ZPC2 GLD W 1 HVD DE60 10012A SCREW TAP TITE TH 3 M4 L10 SWR10 ZPC2 TOOTH 1 DE92 90522A ASSY SCREW PACK MR5481G SCREW A 6EA 1 7 4 Samsung Electronics 7 6 Standard Parts List Exploded Views and Parts List 7 7 Body Latch...

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

Page 21: ...BON 1KOHM 5 1 8W AA TP 1 8X3 2MM 5 R03 R04 R06 R07 R12 P19 2001 000435 R CARBON 1MOHM 5 1 8W AA TP 1 8X3 2MM 1 R25 P20 2001 000515 R CARBON 220OHM 5 1 8W AA TP 1 8X3 2MM 1 R15 P21 2001 000577 R CARBON 2KOHM 5 1 8W AA TP 1 8X3 2MM 2 R05 R13 P22 2001 000613 R CARBON 3 9KOHM 5 1 8W AA TP 1 8X3 2MM 1 R11 P23 2001 000780 R CARBON 470OHM 5 1 8W AA TP 1 8X3 2MM 3 R09 R29 R30 P24 2001 001107 R CARBON S 22...

Page 22: ...CORD AC 120V 60Hz N L BLK YEL BLU BLK BLK BLK BLK WHT ORG WHT BLU RED WHT WHT RED 1 INPUT 120V 60HZ 2 DOOR OPEN 3 LAMP ON 4 P C B PATTERN 5 P C B IN OUT POINT MGT TCO COM COM NC 120V 120V 130V 40W 21V 0V NO L FM DM ASSY CHOKE P C B FUSE 250V 20A WHT G G GND GND C1 C3 C2 0 9mH 500K 2200pF 2200pF BLK BLK BLK BLU BLU RED WHT BLU BLK ORG NO COM NO COM ORG NO COM NC COM DOOR SENSING SWITCH SECONDARY IN...

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