Samsung MW73VR Service Manual
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Samsung MW73VR Service Manual

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Refer to the service manual in the GSPN(see rear cover) for the more information.
BASIC:
M1736N
MODEL:
MW73VR
MODEL CODE: MW73VR/BWT
1. Precaution
2. Product Specification
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Part List
6. PCB Diagrams
7. Wiring Diagrams
8. Schematic Diagrams

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Summary of Contents for Samsung MW73VR

  • Page 1 BASIC: M1736N MODEL: MW73VR MODEL CODE: MW73VR/BWT 1. Precaution 2. Product Specification 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded Views and Part List 6. PCB Diagrams 7. Wiring Diagrams 8. Schematic Diagrams Refer to the service manual in the GSPN(see rear cover) for the more information.

  • Page 2: Table Of Contents

    • Contents 1. Precaution ................3 1-1 Safety precautions .

  • Page 3: Precaution

    1. Precaution...

  • Page 4: Safety Precautions

    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 . 1-1 Safety precautions ( All repairs should be done in accordance with the 13.

  • Page 5: Special High Voltage Precautions

    1. Precaution 1- Special High Voltage Precautions High Voltage Warning Do not attempt to measure any of H . V . Capacitor the high voltages --this includes the filament voltage of the magnetron . High voltage is present during any cook cycle . Before touching any components or wiring, always unplug the oven and discharge the high voltage capacitor (See Figure 1-1)

  • Page 6: Specifications

    - Tact & Menbrane Control Panel - 0L Compact Size MWO 2-2 Table of Specifications Model Items Model Basic Model New MODEL NAME M1736N MW73VR Power Source 230V ~ 50Hz AC 230V ~ 50Hz AC Power consumption Microwave 1300W 1150W Output Power 100W / 800W (IEC-705)

  • Page 7: Accessory

    2. Specifications -3 Accessory Item Description Code No. Q’ty Coupler DE67-00140A Assy-Guide Roller DE97-00193B Tray-cooking DE74-00027A...

  • Page 8: Disassembly And Reassembly

    3. Disassembly and Reassembly 3-1 Disassembly of Magnetron, Motor Assembly and Lamp Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are contained in one assembly) Parts Explaination Photo Explaination Disconnect all lead wires from the magnetron and lamp .
  • Page 9 3. Disassembly and Reassembly 3-1 Disassembly of Magnetron, Motor Assembly and Lamp Parts Explaination Photo Explaination 4. Remove screws securing the magnetron to the wave guide . Magnetron, Take out the magnetron very Motor Assembly carefully . and Lamp Remove two screws from the back panel .

  • Page 10: Replacement Of High Voltage Trancefomer

    3. Disassembly and Reassembly 3-1 Disassembly of Magnetron, Motor Assembly and Lamp Parts Explaination Photo Explaination Magnetron, Remove the oven lamp from Motor Assembly hole of air cover . and Lamp NOTE1: When removing the magnetron, make sure that its antenna does not hit any adjacent parts, or it may be damaged .
  • Page 11 3. Disassembly and Reassembly 3- Replacement of High Voltage Trancefomer Parts Explaination Photo Explaination 3. Remove the mounting bolts . High Voltage Transformer Replace the High Voltage Transformer 5. After replace, reconnect the leads correctly and firmly. PRECAUTION Servicemen should remove their watches whenever working close to or replacing the magnetron . PRECAUTION There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGHVOLTAGE TRANSFORMER secondary and filament terminals.

  • Page 12: Replacement Of Door Assembly

    3. Disassembly and Reassembly 3-3 Replacement of Door Assembly Parts Disassembly Photo Explaination Insert flat screwdriver into the gap between Door “A” and Door “C” to remove Removal of Door “C” . Be careful when handling Door Door “C” “C” because it is fragile .Then remove the door assembly .

  • Page 13: Replacement Of Drive Motor

    3. Disassembly and Reassembly 3-4 Replacement of Drive Motor Parts Explaination Photo Explaination Take out the glass tray, guide roller from oven cavity, disconnect power . Remove turn table motor cover from case bottom . CAUTION : Remove sharp edge after cover removal .

  • Page 14: Replacement Of Control Circuit Board

    3. Disassembly and Reassembly 3-5 Replacement of Control Circuit Board Parts Explaination Photo Explaination Be sure to ground any static electric charge in your body and never touch the control circuit . Removal of . Disconnect the connectors from the Control Box control circuit board .

  • Page 15: Troubleshooting

    4. Troubleshooting 4. Troubleshooting 4-1 Error Code Numbering Rule 1. ERROR CODE NUMBERING RULE is applied to a microwave oven and an oven .(CMO, OTR, Grill, Convection, Commercial etc .) . All sensors and devices have their own number . ex) Gas Sensor = 1, Temp . Sensor = 2, . . . 3.
  • Page 16 4. Troubleshooting Weight Sensor Error Gas Sensor Error Case (E-1X) Solution Page Code E-31 Open (When value of HEX is above “FF” for 5 seconds) 17 Page E-32 Short 18 Page In case the initial value of HEX is under “14” for 30 E-33 seconds while a weight sensor in operation .

  • Page 17: Electrical Malfunction

    4. Troubleshooting 4-3 Electrical Malfunction 4-3-1 Sensor Open Error “E-11, E-21, E-31, E-41, E-46, E-61” is displayed. Connect the sensor. Is the sensor disconnected? : Check if the sensor housing is inserted into the connector of the main PCB. Is the sensor wire Connect the : Check if the sensor wire is damaged, if the connected properly?
  • Page 18 4. Troubleshooting 4-3- Sensor Short Error “E-12, E-22,E-32, E-42, or E-62” is displayed. Remove the shorted part : Check if both terminals of the Is the sensor shorted? of the temperature sensor. sensor are slightly shorted. Is the sensor terminal part : Check if the sensor and related Remove any foreign of the PCB shorted?
  • Page 19 4. Troubleshooting 4-3-3 Sensor Max Time Error “E-13, E-14, E-43, E-44, E-63” is displayed.. Does it heat up without Insert food : Since heating without placing food into placing food into it? and heat it again. the oven may damage the product, take care. Does it heat with completely Place food with : Since heating completely dried food...
  • Page 20 4. Troubleshooting 4-3-4 Key Short Error “- SE -” is displayed. Is the key not recognized at all? Is the key recognized intermittently? Is a specific key not recognized? The membrane is defective. S/W Error Replace the Control Panel. After Power > On, does the symptom continue? Replace the PCB.
  • Page 21 4. Troubleshooting 4-3-5 Weight Sensor Error “E-33, E-34 or E-35” is displayed. Has the turntable been placed over the roller properly? Place the turntable over the roller properly. Is the weight sensor Remove the foreign contaminated by any foreign substance. substance? Does the roller turn Place the food...
  • Page 22 4. Troubleshooting 4-3-6 Weight Sensor Error “E-36 or E-47” is displayed. Was the door open during Close the door. the operation? Check the Door S/W : Check the housing connected to Is the door sensing part normal? and the housing. the door S/W and PCB and if it is opened or shorted intermittently.
  • Page 23 4. Troubleshooting 4-3-7 Cooling Error “E-45” is displayed. Remove any moisture : To remove moisture from the sensor, Is the sensor wet? of the sensor. open the door for 5 minutes. Check the sensor Is the sensor voltage over 3V? : Check if the GND and sensor terminal terminal and housing.
  • Page 24 4. Troubleshooting 4-3-8 EEPROM Error “E-51, E-53, or E-54” is displayed. Insert and solder : An R4LCO40 or 24LCO4 EEPROM EEPROM이 삽입 되었는가? Has the EEPROM been inserted? an EEPROM is to be used. Check if a proper EEPROM has been installed. Replace the Is the EEPROM terminal opened or EEPROM 단자가...
  • Page 25 4. Troubleshooting 4-3-9 Preheating Error “E-23, E-26” is displayed. Check the heater : Check the voltages of Does the heater work? related drive part. both heater terminals. Replace the Is the heater temperature : After operating the heater for more then heater.
  • Page 26 4. Troubleshooting 4-3-10 Cooking Time Over Selection Error “E-02, E-03, E-04, or E-05” is displayed. Is this happening during the MW operation? Is it happening during the Grill operation? Over Time is Over Time is set? set? Is it happening during the Convection operation? An “E-03”...
  • Page 27 4. Troubleshooting 4-3-11 Internal Oven Temperature Abnormal Error “E-24” error code is displayed. “E-09, E-24, E-0A” 가 표시된다 Reconnect the Is the temperature sensor temperature connectivity normal? sensor properly. Check and repair 히터 구동부를 the heater Is the temperature sensor 점검...
  • Page 28 4. Troubleshooting 4-3-1 Swing Heater Detection Error An “E-25” error occurred. Is the oven in MW mode? An “E-25” error Is the internal temperature occurred. over 200 degrees? Press the Cancel key. Press the Cancel key to cancel the current state. Connect it Is the sensor connectivity properly...
  • Page 29 4. Troubleshooting 4-3-13 Swing Heater Detection Error An “E-06” error code is displayed. Is the oven in Bake Toast mode? After waiting for 20 seconds, Has the switch heater check if the micro-switch has operated for 20 seconds? been detected. The micro-switch is Has the micro-switch defective Replace it.
  • Page 30 4. Troubleshooting 4-3-14 If oven malfunction *Inspection method Oven does not operate. Is Primary interlock Is Fuse OK? switch normal? Is Power Relay normal? Is the magnetron Replace switch temperature switch normal? Power supply circuit check point Do check power supply Is SMPS power supply cirduit normal? circuit...
  • Page 31 4. Troubleshooting 4-3-15 If button malfunction Buttons of the control panel do not work. *Inspection method Are button pressed Refer to User Manual in the correct order? Tact type Is the connector of the control panel normal? Replace PCB. Menbrane type...
  • Page 32 4. Troubleshooting 4-3-16 If food is not heated even though an oven works *Inspection method Food is not heated even though an oven works. Is the latch switch Method to control latch switch operating normally? Checking high voltage circuits...

  • Page 33: Exploded Views And Parts List

    5. Exploded Views and Parts List 5-1 Exploded Views M001 M019 T001 M017 T017 Z778 M015 M034 M022 M023 H018 M020 W002 M036 M051 M099 M038 B006 M049 M035 B001 B018 M037 B002 M048 B009 B001 M042 M039 M041 M040 M047...

  • Page 34: Main Parts List

    5. Exploded Views and Parts List 5- Main Parts List (S.N.A : SERVICE NOT AVAILABLE) Level Code No. Description Specification Q’ty Remark M041 0402-001554 HVDIODE-RECTIFIER HV03-12T01,12000V,0 .4A M039 2501-001016 C-OIL 950nF,2 .1KV,BK,35x54x80,20mm M036 4713-001046 LAMP-INCANDESCENT 240V,104mA,25W,ORG,-,- M038 DE26-00099A TRANS H .V SHV-EURO1-1,230V,50HZ,2330V,3 .

  • Page 35: Door Parts List

    5. Exploded Views and Parts List 5-3 Door Parts List D006 D004 D005 D037 D003 D002 D015 D007 D011 D049 (S.N.A : SERVICE NOT AVAILABLE) Level Code No. Description Specification Q’ty SA/SNA Remark D049 DE94-00256J ASSY DOOR M1618/1638,GE/WHT D007 DE61-00198A SPRING KEY M1877,HSWR D6,23 1/4 T0 .7 D011...

  • Page 36: Control Parts List

    C006 C004 C007 C082 (S.N.A : SERVICE NOT AVAILABLE) Level Code No. Description Specification Q’ty SA/SNA Remark C082 DE94-00979J ASSY-CONTROL BOX 230V50HZ,MW73VR/BWT,GE- C004 DE34-00193G SWITCH MEMBRANE MW73VR/BWT,-,-,PET,-,230 C070 DE61-00665A HOLDER-LED ALL-0 .8,PP,-,-,-,BLACK,LED-BA C006 DE61-70076A SPRING-BUTTON -,HSWR,PI0 .6,PI0 .6,-,-,-,- C007 DE66-20275B...

  • Page 37: Standard Parts List

    5. Exploded Views and Parts List 5-5 Standard Parts List (S.N.A : SERVICE NOT AVAILABLE) Level Code No. Description Specification Q’ty Remark 6002-001250 SCREW-TAPPING TH,+,2,M4,L8,Tin-Ni,SWRC18 O/PANEL 6006-001170 SCREW-ASSY TAPP WS,TH,+,M4,L10,ZPC(YEL) PCB EARTH,P/C EARTH,NOISE FILTER EARTH 6006-001176 SCREW-ASSY TAPT WT,PH,+,M4,L8,ZPC(YEL) BKT HVC & DIODE DE60-10051A SCREW-TAP PH -,-,MSWR,-,PH,M4,-,L6,-,- DRIVE MOTOR...

  • Page 38: Pcb Diagrams

    6. PCB Diagrams 6. PCB Diagrams 6-1 PCB Diagrams (This Document can not be used without Samsung’s authorization)

  • Page 39: Wiring Diagrams

    7. Wiring Diagrams 7-1 Wiring Diagrams (This Document can not be used without Samsung’s authorization) FUSE 250V12A 0.1uF 500K 2200pF 2200pF S.M.P.S MAIN RELAY H.V.D MAGNETRON...
  • Page 40 7. Wiring Diagrams 7-1 Wiring Diagrams (This Document can not be used without Samsung’s authorization)

  • Page 41: Schematic Diagrams

    8. Schematic Diagrams 8-1 Schematic Diagrams (This Document can not be used without Samsung’s authorization)
  • Page 42 .samsungportal .com cis .samsungportal .com Europe europe .samsungportal .com China china .samsungportal .com Asia asia .samsungportal .com Mideast & Africa mea .samsungportal .com © Samsung Electronics Co ., Ltd . June . 2007 Printed in Korea Code No . : DE68-04508A...

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