Samsung ME21F707MJT Service Manual Download Page 1

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BASIC :

SMH2117S

MODEL:

ME21F707MJT

MODEL CODE: ME21F707MJT/AA

1. Precaution

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3.  Disassembly and Reassembly
4.  Alignment and Adjustments
5.  Troubleshooting
6.  PCB Diagrams
7.  Wiring Diagrams

Summary of Contents for ME21F707MJT

Page 1: ...BASIC SMH2117S MODEL ME21F707MJT MODEL CODE ME21F707MJT AA 1 Precaution 3 Disassembly and Reassembly 4 Alignment and Adjustments 5 Troubleshooting 6 PCB Diagrams 7 Wiring Diagrams ...

Page 2: ...Adjustment of Primary Switch Door Sensing Switch and Monitor Switch 23 4 7 Vent Exhaust Blower Motor 24 4 8 Thermal Cutout TCO S 25 4 8 1 Oven Thermal Cutout Flame sensor 25 4 8 2 Replacement of Flame Sensor 25 4 8 3 Hood Thermal Cutout 26 4 8 4 Bottom Thermal Cutout 26 4 8 5 Magnetron Thermal Cutout 26 4 9 Output Power of Magnetron 27 4 10 Procedure for Measurement of Microwave Energy Leakage 28 ...

Page 3: ...3 1 Precaution ...

Page 4: ...llowing 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 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 ...

Page 5: ...onnection Short the negative terminal of the high voltage capacitor to to the oven chassis Use a screwdriver 3 tolerance safety related components and adjustments If of the special components PRECAUTION There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGH near these circuits with the oven energized PRECAUTION Service technicians should remove their watch...

Page 6: ...he sooth surface is easy to clean as well the Ceramic Enamel Interior prevents all of them LED Cook top Lighting LED lighting gently brightens every corner of your cook top Low Power consumption and long life of Samsung LED light remarkably save your energy Big Interior Capacity For convenience With the 2 1 cu ft capacity it offers enough space to cook Items BASIC MODEL NEW MODEL SMH2117S XAA SMH2...

Page 7: ...S 10 Level Setting Sound Option YES YES Clock System Option 24H 12H 24H 12H 12H 12H Child Lock YES YES Turntable On Off NO YES Material Finishes Door Color STSS STSS Cavity Interior Ceramic Enamel Ceramic Enamel Packing Case Yellow Box Yellow Box Accessory Wire Rack YES Rectangular Rack YES Rectangular Rack Physical OUTSIDE DIMENSIONS 297 8 W x 161 2 H x 181 2 D 2913 16 W X 1615 16 H X 181 8 D OVE...

Page 8: ... guide ring DE92 90189V 1 Top Template DE68 03843A 1 Wall template DE68 03142B 1 Installation instructions DE68 04108A 1 Use and Care Guide DE68 03970A 1 Hardware kit DE92 90505N 1 FILTER AIR INSTALLED DE63 00196A 1 DE63 30016D 1 Shelf DE75 00083A 1 Exhaust adaptor DE92 90242D 1 ...

Page 9: ...unting plate that is secured to the wall It is not necessary to remove this mounting plate to service this unit This unit is attached to the cabinet above by two self aligning screws Support the unit while removing these screws allowing it to hinge downward to disengage the unit from the mounting plate House Duct Be aware there may also be a connection to the range vent ductwork that is attached t...

Page 10: ...High Voltage Transformer Parts Explaination Photo Explaination Grille 1 Disconnect oven power 2 Remove Grille 1 Remove 2 screws 2 Slide the Grille to the left then pull it straght out Panel Outer 3 Remove Panel Outer by pulling it to the rear of the set ...

Page 11: ... 1 Replacement of High Voltage Transformer Parts Explaination Photo Explaination High voltage capacitor 4 Discharge the High voltage capacitor 5 Disconnect all the leads Base Bottom 6 Remove Base bottom HV Trans 7 Take out the HV Trans ...

Page 12: ...the wave guide 3 Take out the magnetron very carefully NOTE1 When removing the magnetron make sure that it 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 NOTE3 Reconnect the lead wire to thermal cutout mounted on the magnetron before replace...

Page 13: ...sconnect all lead wires from Fan Motor and High Voltage Transformer 3 Put out Assy Fan Motor 4 Remove Fan Blade 5 Remove screws 2 securing Fan Motor 6 Replace Fan Motor to new one 7 After replacing Fan Motor and reconnecting lead wires make sure that the connectors are connected securely on the terminal of Fan Motor by pulling the wires lightly ...

Page 14: ...Assembly Door Pin 90º 1 Disconnect the lead wire 2 Remove Door pin 3 Open the Assembly Door by degree 90º 4 Seperate lifting Assembly Door from Set Removal of Door C 5 A and Door C to remove Door C Becareful when handling Door C because it is fragile Removal of Key Door Spring 6 Detach the spring and key door from Door ...

Page 15: ... is detached from Door A Removal of Door E 8 Remove 4 screw securing Door E to Door A 9 insert and bend a thin metal 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 PRECAUTION PERFORM MICROWAVE LEAKAGE TEST 3 4 Replacement of Door Assembly ...

Page 16: ... the above four switches operate properly check if any other part such as the control circuit board blower motor or high voltage transformer is defective 3 6 Replacement of Drive Motor Parts Explaination Photo Explaination Drive Motor Drive Motor 1 Disconnect power and remove bottom plate screws 5 2 Remove bottom plate and disconnect the turntable motor drive 3 Remove turntable motor screws 1 and ...

Page 17: ...to Explaination Stirrer CLIP COVER STIRRER The stirrer is located on the upper side of the cavity The oven uses a side feed wave guide 1 Disconnect power and open the door 2 Remove the clip and turn the stirrer cover left 3 Remove stirrer cover and the stirrer will come with it ...

Page 18: ...ver touch the control circuit 3 Remove a screw securing the control box assembly 4 Disconnect the connectors from the control circuit board Removal of P C B Assembly Hold the wire And pull it lightly 1 Remove screws securing the control circuit board 2 Lift up the control circuit board from the Ass y control box 3 After reconnecting the connectors make sure that the connectors are connected secure...

Page 19: ...tener and remove the Flexible Printed Circuit FPC of 5 Remove screws 3 securing the control circuit board 6 Lift up the control circuit board from the Ass y door A 7 When reconnecting the FPC connector make sure that the holes on the connector are properly engaged with the hooks on the Plastic Fastener When need to change assy wire harness D Remove the screw on bracket earth door and disconnect wi...

Page 20: ...ion Cooktop Lamp 1 Unplug the oven or turn off the power at the main power 2 Remove the lamp cover and mounting screws 3 Replace LED lamp board 4 Replace the lamp cover and mounting screws 5 Turn the power back on at the main power supply NOTE1 To purchase a new LED lamp board visit an authorized service center or call 1 800 Samsung 1 800 726 7864 NOTE2 The current of Normal LED lamp is 85mA 150mA...

Page 21: ...eassembly 3 10 Replacement of Oven Light Parts Explaination Photo Explaination Oven Light 1 Remove the Grille 2 Remove the COVER LAMP by removing the screw and put up the lever 3 Replace the bulb with a 50 watt halogen bulb ...

Page 22: ... Normal resistance readings are as follows ME21F707MJT AA SHV U1870D Secondary Filament Shows Continuity Primary ME21F707MJT AC SHV U1850A Secondary Filament Shows Continuity Primary Room temperature 20 C ILAMENT 4ERMINALS 3ECONDARY 4ERMINAL 0RIMARY 4ERMINAL 4 2 Magnetron 1 shorted magnetron 2 Isolate the magnetron from the circuit by disconnecting its leads 3 should indicate one ohm or less 4 mag...

Page 23: ...er Then follow the adjustment procedures below After repair and adjustment be sure to check the continuity of all interlock switches and the interlock monitor switch 1 When mounting Primary switch and Interlock Monitor 2 switch and Monitor switch to the latch body is necessary 3 When mounting the Latch Body to the oven assembly adjust the Latch Body by moving it so that the oven door will not have...

Page 24: ...en fall cap is charging then discharging TO TEST BLOWER WINDINGS 1 Disconnect power and remove grill 2 Open control panel and discharge capacitor 3 Disconnent two wires to run capacitor Continuity test across the two wires should be approximately 50 ohms of resistance This test allows you to read across all three windings at the same time TO REMOVE VENT BLOWER 1 Remove unit from its installation 2...

Page 25: ...out Flame sensor The oven thermal cutout Cavity TCO is located on the top side of the oven cavity beside exhaust duct with a temperature rating of 248 F 120 C and is non resetable The cutout is tightly held to the top of the oven cavity under the duct upper Flame Sensor 4 8 2 Replacement of Flame Sensor Disconnect oven power Remove Grill Panel outer 1 Disconnect two wire leads 2 Slide the top of t...

Page 26: ... Thermal Cutout This part can be serviced without removing the microwave from installation 248 F 120 C and remove all power to the microwave oven This cutout is designed to not be resetable To Remove Magnetron Thermal Cutout 1 Disconnect power and remove grill 2 Remove control box assembly 3 Remove two wire leads and unscrew one screw securing the cutout on the base plate 4 8 5 Magnetron Thermal C...

Page 27: ...iter glass vessel with water 2 3 After moving the water into another glass vessel place it in the center of the cooking tray Set the oven to high power and operate for 41 seconds exactly 3 seconds included as a holding time of magnetron oscillation 4 5 6 The output power is obtained by the following formula Output Power 41 Heating Time 45 Counting Time sec 1000 Water cc To Room Temperature Mc Cyli...

Page 28: ...m2 4mW cm2 is used to allow for measurement and meter accuracy 4 11 Check for Microwave Leakage 1 Remove the outer panel 2 600cc and place the beaker in the center of the oven 3 Start the oven at the highest power level 4 Set survey meter dual ranges to 2 450MHz 5 Using the survey meter and spacer cone as described above measure near the opening of magnetron the surface of the air guide and the su...

Page 29: ...y behind the grill To Service 1 Disconnect power and remove Panel outer 2 Separate retainer from receptacle and unplug sensor SENSOR TEST QUICK TEST 1 Auto Defrost and Popcorn 2 Observe diagnostic number in display Numbers approximate 15 185 Normal verify with detection test 213 or Higher Sensor failed to open sensor unplugged wiring or smart board Less then 6 shorted sensor or smart board NOTE On...

Page 30: ...rmal cutout Magnetron Open low voltage transformer Check fan motor when thermal cutout is defective Check Ass y PCB when L V T is defective Check adjustment of primary interlock monitor power relay door sensing switch 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 ...

Page 31: ...ective primary latch switch Defective power relay or Ass y PCB Oven can program but timer does not start A message of Close Door appears on the display Oven can program but timer does not start Amessage of Close Door appears on the display Open or loose wiring of secondary interlock switch Adjust door and interlock switches Off alignment of primary interlock Defective secondary interlock S W Micro...

Page 32: ...rlock switch Adjust door and latch switches Operation of thermal cutout Magnetron Sparks Sparks Metallic ware or cooking dishes touching on the oven wall Inform the customer Do not use any type of cookware with metallic trimming Ceramic ware trimmed with gold or silver powder also causes sparks Uneven cooking Uneven cooking Uneven intensity of microwave due to its characteristics Aluminum foil sho...

Page 33: ... appears when starting sensor function replace smart board E 12 SHORT ERROR of gas sensor Sensor short error Check shorted sensor or smart board If necessary replace sensor If error code appears when starting sensor function replace smart board E 83 Communication Error between Main PCB and Sub PCB Replace Communication Wire or Replace Control Circuit Board TE Touch Communication Error 10seconds Re...

Page 34: ... or E 12 is displayed Perform the operation again and check if it is working properly Check gas sensor data value Press Popcorn and Auto Defrost at once Is sensor data value shown on the display Is the Gas Sensor connected to Wire harness S properly Is the Connector CN301 connected to the board properly 5 2 1 OPEN ERROR of gas sensor SHORT ERROR of gas sensor ...

Page 35: ...Check the connection between wire harness C and wire harness D Are they connected properly Connect the both wire properly Connect the wire properly Replace the wire Check the connection between wire harness C and the board Are they connected properly After Power On does the symptom continue Replace the Main PBA and Sub module E 83 is displayed 5 2 1 Communication Error between Main PCB and Sub PCB...

Page 36: ...t is working properly S W Error Is a specific key not recognized Is the key recognized intermittently The membrane is defective Replace the Assy Door A Include switch membrane Is the key not recognized at all After Power On does the symptom continue Replace the PCB Sub Module 5 2 1 Touch Communication Error ...

Page 37: ...n Board Writing Connector When do Main MICOM revision connect to MICOM writer No connection at normal times 2 CN102 Main PBA Connector Connect Main PBA 3 CN103 Touch Film Connector Connect Touch Film 4 CN104 Touch Film Connector Connect Touch Film 5 CN201 On Board Writing Connector When do Touch IC revision connect to Touch writer No connection at normal times 1 2 3 4 5 ...

Page 38: ...17 TOUCH FILM CONTACT Y4 18 TOUCH FILM CONTACT Y3 19 TOUCH FILM CONTACT Y2 20 TOUCH FILM CONTACT GND CN104 1 TOUCH FILM CONTACT GND 2 NO CONNECTION 3 NO CONNECTION 4 TOUCH FILM CONTACT Y7 5 TOUCH FILM CONTACT Y6 6 TOUCH FILM CONTACT Y5 7 TOUCH FILM CONTACT Y4 8 NO CONNECTION 9 NO CONNECTION 10 TOUCH FILM CONTACT GND 11 TOUCH FILM CONTACT GND 12 TOUCH FILM CONTACT X7 13 TOUCH FILM CONTACT X6 14 TOU...

Page 39: ...n Boost Ventilation 9 RY209 Vent High Relay Turn on High Ventilation 10 RY210 Vent Medium Relay Turn on Mdeium Ventilation 11 RY211 Vent Low Relay Turn on Low Venrilation a CN101 Power Connector Connect Power supply b CN102 On Board Writhing Connector When do Main MICOM revision connect to MICOM ISP writer No connection at normal times c CN201 Relay Connector A Terminal for Connecting with Relay C...

Page 40: ... 1 DOOR SWITCH RELAY V 2 NO CONNECTION 3 DOOR SWITCH 12V 4 TCO SENSOR 5 GND CN701 1 POWER 12V 2 POWER GND 0V 3 POWER 5V 4 TX4_SUB 5 RX4_SUB 6 WAKE UP_SUB 7 SCL_SUB 8 SDA_SUB 9 POWER GND V CN201 1 VENT MEDIUM 2 NO PIN 3 VENT HIGH 4 NO PIN 5 VENT BOOST 6 NO PIN 7 T TABLE 8 NO PIN 9 MAIN 10 NO PIN 11 INRUSH CN202 1 POWER GND 0V 2 NO PIN 3 BRIGHT 4 NO PIN 5 NIGHT 6 NO PIN 7 VENT LOW CN301 1 GAS SENSOR...

Page 41: ...41 7 Wiring Diagrams 7 1 Wiring Diagrams ME21F707MJT AA This Document can not be used without Samsung s authorization ...

Page 42: ...42 7 Wiring Diagrams 7 2 Wiring Diagram ME21F707MJT AC This Document can not be used without Samsung s authorization ...

Page 43: ...TWORK Area Web Site Europe CIS Mideast Africa gspn1 samsungcsportal com Asia gspn2 samsungcsportal com North Latin America gspn3 samsungcsportal com China china samsungportal com Samsung Electronics Co Ltd May 2013 Printed in Korea ...

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