Samsung ME21R7051S Series Service Manual
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Samsung ME21R7051S Series Service Manual

Samsung ME21R7051S Series Service Manual

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MICOROWAVE OVEN
MICROWAVE OVEN
BASIC
: ME20H705MS*
MODEL
: ME21R7051S*
MODEL CODE : ME21R7051S*/AA
1.
Precaution
2. Specification
3.
Disassembly and Reassembly
4. Alignment and Adjustments
5.
Troubleshooting
6. PCB Diagrams
7.
Wiring Diagrams
8. Schematic Diagrams
CONTENTS

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Summary of Contents for Samsung ME21R7051S Series

  • Page 1 MICROWAVE OVEN BASIC : ME20H705MS* MODEL : ME21R7051S* MODEL CODE : ME21R7051S*/AA MICOROWAVE OVEN CONTENTS Precaution 2. Specification Disassembly and Reassembly 4. Alignment and Adjustments Troubleshooting 6. PCB Diagrams Wiring Diagrams 8. Schematic Diagrams...

  • Page 2: Table Of Contents

    • Contents 1. Precaution ................... 4 1-1 Safety precautions .
  • Page 3 • Contents 4-12 Note in Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4-14 Sensor .

  • Page 4: Precaution

    This document can not be used without Samsung’s authorization. 1. Precaution 1. Precaution...

  • Page 5: Safety Precautions

    This document can not be used without Samsung’s authorization. 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 .

  • Page 6: Special High Voltage Precautions

    This document can not be used without Samsung’s authorization. 1. Precaution 1-2 Special High Voltage Precautions High Voltage Warning Do not attempt to measure any of the high voltages --this includes the filament voltage of the magnetron . High voltage is present during any cook cycle .

  • Page 7: Specifications

    2. Specifications 2-1 Features Professional Design Samsung New OTR with Stainless Steel, it has professional look and the design matches great with other kitchen appliances, so that it provides harmonious kitchen interior and finally completes total kitchen solution. Stirrer and Turntable Continually rotates food to ensure even cooking .

  • Page 8: Table Of Specifications

    This document can not be used without Samsung’s authorization. 2. Specifications 2-2 Table of Specifications BASIC MODEL NEW MODEL Items ME20H705MS*/AA ME21R7051S*/AA ME20H705MS*/AC ME21R7051S*/AC Capacity 2 . 0 cu . f t 2 . 1 cu . f t Power Source 120V~60Hz 120V~60Hz ME20H705MS*/AA...
  • Page 9 This document can not be used without Samsung’s authorization. 2. Specifications Table of Specifications BASIC MODEL NEW MODEL Items ME20H705MS*/AA ME21R7051S*/AA ME20H705MS*/AC ME21R7051S*/AC Power Level YES(10 Level) YES(10 Level) Sound Option Clock System Option Feature 24H + 12H 24H + 12H (24H/12H/24H+12H) Setting...

  • Page 10: Accessory

    This document can not be used without Samsung’s authorization. 2. Specifications 2-3 Accessory Code No. Item Description Q’ty ME21R7051S*/AA Glass tray DE74-20002D Roller guide ring DE94-03688A Top Template DE68-03843A Wall template DE68-03142B Installation instructions DE68-04577A Use and Care Guide DE68-03970A Hardware-kit...

  • Page 11: Disassembly And Reassembly

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3. Disassembly and Reassembly MAGNETRON, MOTOR ASSEMBLY, VENT BLOWER AND HIGH VOLTAGE TRANSFORMER Oven must be removed from wall. REMOVING OVEN FROM WALL (2 PEOPLE REQUIRED) Disconnect the power cord from the outlet .

  • Page 12: Replacement Of High Voltage Transformer

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-1 Replacement of High Voltage Transformer Parts Explanation Photo Explanation Disconnect oven power . Remove Grille . Removal of 1) Remove 2 screws Grille 2) Slide the Grille to the left, then pull it straight out .
  • Page 13 This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly Replacement of High Voltage Transformer Parts Explanation Photo Explanation Discharge the High voltage capacitor . Removal of High voltage capacitor Disconnect all the leads . Remove 7 screws from the Base bottom .

  • Page 14: Replacement Of Magnetron

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-2 Replacement of Magnetron Parts Explanation Photo Explanation Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are contained in one assembly) .

  • Page 15: Replacement Of Fan Motor

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-3 Replacement of Fan Motor Parts Explanation Photo Explanation Remove Grille and Panel Outer . Disconnect all lead wires from Fan Motor and High Voltage Transformer .

  • Page 16: Replacement Of Door Assembly

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-4 Replacement of Door Assembly Parts Disassembly Photo Explanation Disconnect the lead wire . Remove Door pin . Removal of Door Pin Door Assembly Open the Assembly Door by degree 90º...

  • Page 17: Replacement Of Door Assembly

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-4 Replacement of Door Assembly Parts Disassembly Photo Explanation Remove 2 screws, then handle is Removal of Handle detached from Door “A” . Remove 5 screw securing Door “E” to Door “A”...

  • Page 18: Replacement Of Fuse

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-5 Replacement of Fuse Parts Explanation Photo Explanation The fuse is located on the noise filter. Disconnect power and remove grille . Replace the fuse . When 20A fuse blows out by the operation...

  • Page 19: Removal Of Stirrer

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-7 Removal of Stirrer Parts Explanation Photo Explanation COVER STIRRER The stirrer is located on the upper side of the cavity . The oven uses a side feed wave guide .

  • Page 20: Replacement Of Control Circuit Board (Main Pba)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-8 Replacement of Control Circuit Board (MAIN PBA) 3-8-1 MAIN PBA Parts Explanation Photo Explanation Disconnect power and remove grille . Be sure to ground any static electric charge in your body and never touch the control circuit .

  • Page 21: Replacement Of Control Circuit Board

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly Replacement of Control Circuit Board 3-8-2 SUB Module Parts Explanation Photo Explanation Remove the Door-E (14Page) Pull the lever end of the plastic fastener and remove the Flexible Printed Circuit(FPC) of Membrane .

  • Page 22: Replacement Of Cooktop Lamp

    Turn the power back on at the main SCREW power supply . SCREW • To purchase a new LED lamp board, visit an authorized service center or call 1-800-Samsung (1-800-726-7864) . • The current of Normal LED lamp is 85mA ~ 150mA (in DC12V) .

  • Page 23: Replacement Of Oven Light

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-10 Replacement of Oven Light Parts Explanation Photo Explanation Remove the Grille Remove the COVER LAMP by removing Oven Light the screw and put up the lever .

  • Page 24: Alignment And Adjustments

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4. Alignment and Adjustments PRECAUTION High voltage is present at the high voltage terminals during any cook cycle . It is neither necessary nor advisable to attempt measurement of the high voltage .

  • Page 25: High Voltage Capacitor

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-3 High Voltage Capacitor Check continuity of the capacitor with the meter set at the highest resistance scale . Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9MΩ.

  • Page 26: Adjustment Of Primary Interlock Switch, Door Sensing Switch (Secondary Interlock Switch)

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-6 Adjustment of Primary interlock switch, Door sensing switch (Secondary interlock switch), and Monitor interlock switch PRECAUTION For continued protection against radiation hazard, replace parts in accordance with the wiring diagram and be sure to use the correct part number for the following switches: Primary and secondary interlock switches, and the monitor interlock switch (replace all together) .

  • Page 27: Vent Exhaust Blower Motor

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-7 Vent Exhaust Blower Motor THIS COMPONENT REQUIRES REMOVAL OF MICROWAVE OVEN FROM INSTALLATION FOR SERVICING. RUN CAPACITOR The run capacitor is located behind the top grill above the control area .

  • Page 28: Thermal Cutout (Tco's)

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-8 Thermal Cutout (TCO’S) There are 4 different thermal cutouts in this unit with 4 different purposes . They are : Oven thermal cutout (flame sensor), on cavity top.

  • Page 29: Hood Thermal Cutout

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-8-3 Hood Thermal Cutout This cutout will protect the touch control from excessive heat by turning the vent fan on at low speed . If the surface...

  • Page 30: Output Power Of Magnetron

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-9 Output Power of Magnetron PRECAUTION 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 .

  • Page 31: Procedure For Measurement Of Microwave Energy Leakage

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-10 Procedure for Measurement of Microwave Energy Leakage Pour 275±15cc of 20±5°C(68±9°F) water in a beaker which is graduated to 600cc, and place the beaker in the center of the oven .

  • Page 32: Sensor

    This document can not be used without Samsung’s authorization. 4. Alignment and Adjustments 4-13 Leakage Measuring Procedure 4-13-1 Record keeping and notification after measurement After adjustment and repair of a radiation preventing device, make a repair record for the measured values, and keep the data .

  • Page 33: Troubleshooting

    This document can not be used without Samsung’s authorization. 5. Troubleshooting 5. Troubleshooting PRECAUTION Check grounding before checking for trouble . Be careful of the high voltage circuit . Discharge the high voltage capacitor . 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 .
  • Page 34 Open or loose connection of This document can not be used without Samsung’s authorization. membrane key pad to Ass’y PCB Shorted or open membrane panel 5. Troubleshooting Replace PCB main. Defective Ass’y PCB Timer starts countdown but no microwave oscillation.
  • Page 35 Tighten door sensing switch wiring. Loose wiring of door sensing switch on when plugged in Aging of magnetron This document can not be used without Samsung’s authorization. Fan motor turns Tighten door sensing switch wiring. Loose wiring of door sensing switch...

  • Page 36: Error Code List

    This document can not be used without Samsung’s authorization. 5. Troubleshooting 5-2 Error Code List Error Code Others (E-0X, Letter) Solution Key short Error (10 seconds) Press the Stop/Clear button . -SE- If KEY input is successive more than If the button isn`t pressed, replace the switch 10 seconds, marks -SE- .
  • Page 37 This document can not be used without Samsung’s authorization. 5. Troubleshooting 5-2-1 -SE- Key Short Error (- SE -) Is the key not recognized at all? Is the key recognized intermittently? Is a specific key not recognized? The membrane is defective.

  • Page 38: Open Error Of Gas Sensor/Short Error Of Gas Sensor

    This document can not be used without Samsung’s authorization. 5. Troubleshooting 5-2-2 OPEN ERROR of gas sensor/SHORT ERROR of gas sensor "E-11" or "E-12" is displayed. Is the Connector CN301 Put the connector to connected to the board properly? proper position.(CN301)

  • Page 39: Communication Error Between Main Pcb And Sub Pcb

    This document can not be used without Samsung’s authorization. 5. Troubleshooting 5-2-3 Communication Error between Main PCB and Sub PCB "E-83" is displayed. Check the connection between wire harness-C and the board. Connect the wire properly. Are they connected properly?

  • Page 40: Pcb Diagrams

    This document can not be used without Samsung’s authorization. 6. PCB Diagrams 6. PCB Diagrams 6-1. PCB Diagrams (SUB MODULE) (This Document can not be used without Samsung’s authorization) Part Number Part name Function and Rule CN103 LED Display Connector...

  • Page 41: Pcb Diagrams (Sub Module)

    This document can not be used without Samsung’s authorization. 6. PCB Diagrams 6-2. PCB Diagrams (SUB MODULE) (This Document can not be used without Samsung’s authorization) ▶ CN901 1) LED Display Control 1 2) LED Display Control 2 ▶ CN102...

  • Page 42: Pcb Diagrams (Main Pba)

    This document can not be used without Samsung’s authorization. 6. PCB Diagrams 6-3. PCB Diagrams (MAIN PBA) (This Document can not be used without Samsung’s authorization) Part Number Part name Function and Rule RY201 Main Relay Fan, Lamp, T/T Control...

  • Page 43: Pcb Diagrams (Main Pba)

    This document can not be used without Samsung’s authorization. 6. PCB Diagrams 6-4. PCB Diagrams (MAIN PBA) (This Document can not be used without Samsung’s authorization) ▶ CN701 ▶ CN401 1) +12V 1) DOOR SWITCH 2) GND ▶ CN301 2) NO PIN...

  • Page 44: Wiring Diagrams

    This document can not be used without Samsung’s authorization. 7. Wiring Diagrams 7. Wiring Diagrams 7-1 Wiring Diagrams (This Document can not be used without Samsung’s authorization)

  • Page 45: Wiring Diagram

    This document can not be used without Samsung’s authorization. 7. Wiring Diagrams 7-2 Wiring Diagrams (This Document can not be used without Samsung’s authorization)

  • Page 46: Schematic Diagrams

    This document can not be used without Samsung’s authorization. 8. Schematic Diagrams 8. Schematic Diagrams 8-1 Schematic Diagrams (SUB MODULE)) (This Document can not be used without Samsung’s authorization)

  • Page 47: Schematic Diagrams (Main Pba)

    This document can not be used without Samsung’s authorization. 8. Schematic Diagrams 8-2 Schematic Diagrams (MAIN PBA) (This Document can not be used without Samsung’s authorization)
  • Page 48 .samsungcsportal .com China china .samsungportal .com This Service Manual is a property of Samsung Electronics Co.,Ltd. © Samsung Electronics Co ., Ltd . March . 2019 Any unauthorized use of Manual can be punished under applicable Printed in Korea...

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