Dacor NQ70M7770D Series Service Manual
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Dacor NQ70M7770D Series Service Manual

Combi oven
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OVEN
OVEN
COMBI OVEN
BASIC:
NQ70M7770D*
MODEL:
DOC30P977D*
MODEL CODE:
DOC30P977D*
CONTENTS
1. Precaution
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagrams
6. Wiring Diagram

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Summary of Contents for Dacor NQ70M7770D Series

  • Page 1 OVEN COMBI OVEN BASIC: NQ70M7770D* MODEL: DOC30P977D* MODEL CODE: DOC30P977D* OVEN CONTENTS 1. Precaution 2. Specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. PCB Diagrams 6. Wiring Diagram...
  • Page 2 Disclaimer: This manual contains confidential and proprietary information of Samsung Electronics Co., Ltd. ("Samsung") All text, graphics, user interfaces, visual interfaces, photographs, trademarks, and logos (collectively, "Content"), including but not limited to the design, structure, selection, coordination, "look and feel" and arrangement of such Content, contained in this manual is owned, controlled or licensed by or to Samsung, and is protected by trade dress, copyright, patent and trademark laws, and various other intellectual...

  • Page 3: Table Of Contents

    • Contents 1. Precaution ....................5 1-1 Safety precautions .
  • Page 4 • Contents 4. Troubleshooting ..................50 4-1 Failure Display Codes .

  • Page 5: Precaution

    This document can not be used without Samsung’s authorization. 1. Precaution 1. Precaution PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY (a) Do not operate or allow the oven to be operated with (c) Before turning on microwave power for any service the door open.

  • Page 6: 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 7: 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. Before touching any components or wiring, always unplug the oven and discharge the high voltage capacitor (See Figure 1-1)

  • Page 8: Forward

    1-3 Forward This Dacor Service Manual, “Built in electric wall oven” provides the technician with information on the operation and service of the built in electric wall oven.. It is to be used as a training Service Manual. For specific information on the model being serviced, refer to the “Owner’s Manual”...

  • Page 9: Important Safety Instructions

    This document can not be used without Samsung’s authorization. 1. Precaution 1-5 Important Safety Instructions Read and follow all instructions before using your oven to prevent the risk of fire, electric shock, injury to person, or damage when using the oven. This guide doesn’t cover all possible conditions that may occur. For further assistance contact your service agent or manufacturer.
  • Page 10 This document can not be used without Samsung’s authorization. 1. Precaution SELF-CLEAN OVENS VENTILATING HOODS: • Do Not Clean Door Gasket – The door gasket is • Clean Ventilating Hoods Frequently – Grease should essential for a good seal. Care should be taken not to not be allowed to accumulate on hood or filter.

  • Page 11: Specifications

    This document can not be used without Samsung’s authorization. 2. Specifications 2-1 Table of Specifications ITEMS NEW MODEL Model Name DOC30P977D* Category Dacor Pro Combi Width 30" Overall Installation type Built-In Color availability Oven KNOB+LCD Display Control Electronic clock Control lock capability Audible preheat signal Capacity (cu.ft)
  • Page 12 2. Specifications ITEMS NEW MODEL Model Name DOC30P977D* Category Dacor Pro Combi 756 x 1102 x 671 (mm) Net Outside (WxHxD) 29 ³/₄ x 43 ³/₈ x 26 ³/₈ (inch) 730.25 x 1073 x 597 (mm) Cutout - Standard (WxHxD) 28 ³/₄...

  • Page 13: Accessory

    This document can not be used without Samsung’s authorization. 2. Specifications 2-2 Accessory Item Description Code No. Q’ty Assy Guide Roller DE94-04028A Tray-cooking DE63-00878A Assy Wire Rack DE97-00456B Assy Wire Rack DE94-04037A Hot Plate DE63-00809A Rack Wire DG67-00149A Sensor-Probe DG32-00013A Assy Wire Rack DG94-01486A...

  • Page 14: Disassembly And Reassembly

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. 3-1 Preparing remove the Assy-Frame Wall oven Item How to use...

  • Page 15: Seperate Upper Assy Wire And Lower Assy Wire

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-2 Seperate Upper assy wire and Lower assy wire PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts. Sharp edges may be present, and you can cut yourself if you are not careful. Parts Explanation Photo Explanation...

  • Page 16: Removing Pcb-Main

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-3 Removing PCB-Main WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 17: Removing Control Box

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-4 Removing control box WARNING Disconnect power before servicing the oven Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 18: Removing Sub Pcb And Upper Oven Pcb

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-5 Removing Sub PCB and Upper Oven PCB WARNING Disconnect power before servicing the oven Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 19: Removing The Wi-Fi Module

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-6 Removing the Wi-Fi module WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 20: Removing Magnetron (Mgt)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-7 Removing Magnetron (MGT) WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 21: Removing Cooling Fan (Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-8 Removing cooling fan (Upper oven) WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 22: Removing Mgt Cooling Fan

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-9 Removing MGT cooling fan WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 23: Removing High Voltage Transformer

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-10 Removing high voltage transformer WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 24: Removing High Voltage Capacitor

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-11 Removing high voltage capacitor WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 25: Removing Grill Heater (Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-12 Removing Grill Heater (Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock.

  • Page 26: Removing Turn Table Motor (Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-13 Removing turn table motor (Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock.

  • Page 27: Removing Lamp(Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-14 Removing Lamp(Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 28: Convection Motor (Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-15 Convection motor (Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 29: Removing Gas Sensor

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-16 Removing Gas sensor WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 30: Knob

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-17 Knob WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 31: Oven Door (Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-18 Oven Door (Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 32: Handle-Door, Assy Hinge (Upper Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-19 Handle-Door, Assy Hinge (Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock.
  • Page 33 This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-19 Handle-Door, Assy Hinge (Upper Oven) WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock.

  • Page 34: Removing The Latch-Door & Switch-Door Plunger

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-20 Removing The Latch-Door & Switch-Door Plunger WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock.

  • Page 35: Removing Heater-Broil (Lower Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-21 Removing Heater-Broil (Lower Oven) WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. CAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 36: Removing Bake Element

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-22 Removing Bake Element Parts Explanation Photo Explanation Unplug oven or disconnect power. Pull the oven out of its mounting location so that you can access the rear of the unit.

  • Page 37: Removing Convection Element, Fan-Convection And Motor-Convection (Lower Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-23 Removing Convection Element, Fan-Convection and Motor-Convection (Lower Oven) Parts Explanation Photo Explanation Disconnect power and remove oven racks. Pull the oven out of its mounting location so that you can access the rear of the unit.

  • Page 38: Removing Lamp (Lower Oven)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-24 Removing Lamp (Lower Oven) WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. CAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 39: Removing Sensor-Thermistor

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-25 Removing Sensor-Thermistor WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 40: Disassembly Door(Lower)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-26 Disassembly Door(LOWER) WARNING Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. WARNING The door is very heavy.

  • Page 41: Replace Door(Lower)

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-27 Replace Door(LOWER) Parts Explanation Photo Explanation 1. Assembly rubber and connect wire harness.(after connecting, push connector to inside of the hole) 2. Firmly grasp both sides of the door at the top and match hinge &...

  • Page 42: Handle-Door And Glass-Inner - 1

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-28 HANDLE-DOOR AND GLASS-INNER - 1 Parts Explanation Photo Explanation To remove the HANDLE DOOR and GLASS INNER: 1. Remove the oven door from the oven. 2. Place the oven door on a padded work surface with the front glass facing down.

  • Page 43: Handle-Door And Glass-Inner - 2

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-29 HANDLE-DOOR AND GLASS-INNER - 2 Parts Explanation Photo Explanation To remove Glass-Inner 1. Remove 4 screws to remove the Glass HANDLE-DOOR inner sub. AND GLASS- 2. Remove 4 screws to remove LED assy INNER - 2 and 2 sub glasses.

  • Page 44: Removing Gasket-Door

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-30 Removing Gasket-Door WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. PRECAUTION When you work on the electric oven, be careful when handling the sheet metal parts.

  • Page 45: Removing The Steam Set

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-31 Removing the steam set WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 46: Assy Steamer

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-32 Assy Steamer WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Schematic Diagram &...
  • Page 47 This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly Assy Steamer Parts Explanation Photo Explanation Remove clamp steam tube. Remove 2 connectors and 2 tube clamps. Assy Steamer Remove 3 screws. Pull 2 TCO forward to separate.

  • Page 48: Assy Generator Sub

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-33 Assy Generator Sub WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 49: Motor Ac Pump

    This document can not be used without Samsung’s authorization. 3. Disassembly and Reassembly 3-34 Motor AC Pump WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the oven. Replace all panels before operating oven. Failure to do so can result in death or electrical shock. Parts Explanation Photo Explanation...

  • Page 50: Troubleshooting

    This document can not be used without Samsung’s authorization. 4. Troubleshooting 4. Troubleshooting 4-1 Failure Display Codes * Operation check mode 1. Touch at the same time immediately after turn on the power. Turn on the lamp automatically and display the check mode.
  • Page 51 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes Check code Failure SOLUTION CAUSE code 1. Check whether keypad cable is inserted into connector on sub pcb. This code occurs if 2. Check for shorts between Sub PCB and the connector, or the C-d0 the keys are shorted.
  • Page 52 This document can not be used without Samsung’s authorization. 4. Troubleshooting Failure SOLUTION CAUSE code 1. Disconnect power. Disconnect sensor harness from sensor. Measure sensor resistance : 1080Ω at the room temperature. -> If there are any problems, replace oven sensor. 2.
  • Page 53 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes Gas Sensor Information Code (C-10) Connect the sensor. Is the Sensor Disconnected? Is the Sensor wire connected Connect the wire peoperly. properly? Does the voltage change as the S/W Fault humidity, temperature and weight change?
  • Page 54 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes Upper oven sensor Lower oven sensor "C-20 or C-23" Disconnect power Measure sensor resistance. Replace oven sensor (1080Ω at the room temperature) Check the connector condition of the wire *reconnect harness.
  • Page 55 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes Safety error "C-21" "C-d1" Disconnect power and main PCB. * Check DLB, Bake, Broil,convection * Repair damaged circuit board or relay operation.(Normal: ∞ Ω) replace main PCB. * Check main PCB for damage * Measure oven sensor resistance.
  • Page 56 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes "C-d1" *Disconnect power. *Disconnect harness connected to Lock motor * Check micro switch (com-NC=>closed, when door is unlocked.) * Replace micro switch or Lock motor. * Measure resistance of Lock motor Coil.(1750~1850Ω...
  • Page 57 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes "C-F0" * Disconnect power. * Unplug connectors from Sub PCB, Wall Main PCB and 8000J main PCB. Sub PCB 8000J Main PCB * Check wire harness between * Repair damaged harness or replace.
  • Page 58 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes "C-F2" * Disconnect power. * Unplug connector on Sub PCB. * Check if ribbon cable from touch panel is connected normally into Sub PCB * Repair damaged wire or replace.
  • Page 59 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes "C-d0" *Disconnect power. *Remove keypad cable from Sub PCB. * Repair sub pcb if circuit is * Check for shorted cable connectors and damage to Sub PCB shorted or damaged.
  • Page 60 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes STEAM SENSOR PROBLEM (C-70) Check if the wire is correctly connected Connect the wire harness correctly between Wall Main PCB (CN340)and steam and test the oven. sensor Replace Wall Main PCB and reconnect all connectors.
  • Page 61 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-1 Failure Display Codes WATER DRAINING TIME PROBLEM (C-72) Check The ground wire on the sub Fix wiring and operate oven again. generator. Is it connected correctly? Check operation of the pump Change the motor and motor and wire connections.

  • Page 62: Adjustment Of Primary Interlock Switch, Door Sensing Switch

    This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-2 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 63 This document can not be used without Samsung’s authorization. 4. Troubleshooting “C-A2” * Check if the wire is correctly connected between wall * Reconnect the Check cooling motor operation. main PCB (CN202) and Motor connector. connector. * Replace or repair the cooling motor.
  • Page 64 This document can not be used without Samsung’s authorization. 4. Troubleshooting Control PCB Operation List of Control PCB 8000J Main PCB Wall Main PCB Sub PCB LCD PCB...
  • Page 65 This document can not be used without Samsung’s authorization. 4. Troubleshooting SYMPTOM DIAGNOSIS REMEDY Measure an input voltage. Check circuit breaker. (240V or 208V) Check state of a wire connected to Measure an input voltage of terminal Terminal Block block. Measure supplied voltage at the Replace or repair harness if loose or connector on 8000J Main PCB L1~N:...
  • Page 66 This document can not be used without Samsung’s authorization. 4. Troubleshooting SYMPTOM DIAGNOSIS REMEDY Make sure the keypad cable is Replace pcb if keypad cable is connected correctly. connected correctly. Keypad is not Check whether connector on pcb is Replace or repair after confirming that keypad working correctly.

  • Page 67: Electrical Malfunction

    This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction MWO does not operate. Left door switch Right door switch Close the door and check if the Micro Switch is working properly. Is Primary interlock Is Fuse OK? switch normal? Is the power part of Replace ASSY PCB...
  • Page 68 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Convection Mode does not work. Left door switch Right door switch...
  • Page 69 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Left door switch Right door switch...
  • Page 70 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Troubleshooting (Power) No Power Check the circuit breaker. Check terminal block voltage. Check the terminal block connections (240V,60Hz) Replace or Repair the wiring Check the wiring. Check the votage of PCB, SMPS -input : 120V -output : 12V,5V...
  • Page 71 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Troubleshooting (PCB failure) PCB Failure - Check the input voltage of Repair Faulty wiring - Check Terminal block PCB SMPS (input check- or PCB check voltage(240V). point : 120V ) Reset the circuit braker or check main power.
  • Page 72 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Troubleshooting (Wi-Fi connection) Step 1. - Check whether display is showing • If display is showing WiFi icon, check to ‘Samsung Connect’ app. Delete and re-install the app. And then, try again (Follow manual instruction for samsung connect app).
  • Page 73 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Parts Photo Good No Good Main Fuse 13.5 ~ 17 Ω 100 MΩ exceed T.C.O 0.1 ~ 1 Ω 100 MΩ exceed Damper Motor 13.5 ~ 15.5 kΩ 100 MΩ...
  • Page 74 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Photo Parts Photo Photo Good No Good Photo 100 MΩ exceed Turn Table Motor 13.5 ~ 17 kΩ 100 MΩ exceed Fan Motor 50 ~ 60 Ω 100 MΩ...
  • Page 75 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Component testing procedures WARNING ELECTRICAL SHOCK HAZARD Disconnect power before servicing the range. Replace all panels before operating range. Failure to do so can result in death or electrical shock. FIGURE TESTS MEASURE RESULTS...
  • Page 76 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction FIGURE TESTS MEASURE RESULTS Lock motor Resistance : 1600~2200Ω (at the room temperature) Measure operation of the micro voltage : 120V switch and the motor after removing wire harness from terminals.
  • Page 77 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction FIGURE TESTS MEASURE RESULTS Measure resistance value of the oven temperature sensor. Approx. Check if wire harness is loose or at the room temperature :1080Ω disconnected.
  • Page 78 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-3 Electrical Malfunction Oven sensor resistance (Temperature vs. Sensor resistance) Ro = 1000 Ohms (0˚C), RP = 2757 Ohms, Up = 5V, a = 0.00375 degree F degree C ohms degree F degree C...

  • Page 79: Self-Diagnosis

    This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-4 Self-diagnosis Temp sensor & Heater check After connecting the power, check if the display works properly. Remove all accessories (Gliding Rack, Flat-Rack...etc.) from inside of the oven cavity. You cannot proceed with self-diagnosis if the oven cavity is hot or the door is open.
  • Page 80 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-4 Self-diagnosis Check the lower broil heater wire on the Check wiring and operate oven again. Wall Main PCB(T206, T207). Is it connected correctly? Check operation of the lower broil heater Cange the lower broil heater and and wire connections.
  • Page 81 This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-4 Self-diagnosis Check the lower bake heater wire on the Check wiring and operate oven again. Wall Main PCB (T206, T207). Is it connected correctly? Check operation of the lower bake heater Cange the lower bake heater and and wire connections.

  • Page 82: Procedure For Measurement Of Microwave Energy Leakage

    This document can not be used without Samsung’s authorization. 4. Troubleshooting 4-5 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. Start to operate the oven and measure the leakage by using a microwave energy survey meter.

  • Page 83: Pcb Diagrams

    This document can not be used without Samsung’s authorization. 5. PCB Diagrams 5. PCB Diagrams 5-1 PCB Diagrams (Lower oven) 7 8 9 10 Parts No. Function Prorange_Gas Prorange_D/Fuel Wall Oven Combi Oven RY200 DLB Relay RY202 Broil Heater Relay RY203 Bake Heater Relay RY205...
  • Page 84 This document can not be used without Samsung’s authorization. 5. PCB Diagrams PCB Diagrams (Lower oven) ▶ CN300 1. Water tank in 14. GND 2. 5V 15. NC 3. GND 16. Water inlet sensing 4. HASS Micom RX 17. Water Tank_H 5.

  • Page 85: Pcb Diagrams (Upper Oven)

    This document can not be used without Samsung’s authorization. 5. PCB Diagrams 5-2 PCB Diagrams (Upper oven) 20 21 23 24 Part Name Function and Role RY210 GRILL-IN HEATER RELAY RY212 CONVECTION HEATER RELAY RY211 GRILL-OUT HEATER RELAY RY209 POWER RELAY RY213 STEAM HEATER RELAY RY217...
  • Page 86 This document can not be used without Samsung’s authorization. 5. PCB Diagrams PCB Diagrams (Upper oven) ▶ RY210 1. Grill-in Heater ▶ CN401 2. AC Neutral 1. Gas Sensor 1 ▶ RY211 ▶ RY209 2. Gas Sensor 2 1. Grill-out Heater ▶...

  • Page 87: Pcb Diagrams (Lcd Pba)

    This document can not be used without Samsung’s authorization. 5. PCB Diagrams 5-3 PCB Diagrams (LCD PBA) Parts Part Name Function and Rule Number CN503 Sub Board Connector This is connected with sub board. CN501 Touch Connector This is connected with touch pannel. CN601 LCD Connector This is connected with 7.0”...
  • Page 88 This document can not be used without Samsung’s authorization. 5. PCB Diagrams PCB Diagrams (LCD PBA) ▶ CN503 ▶ CN703 1. SET_TxD 1. GND 4. 5V 2. SET_RxD 2. USB DATA D+ 5. NC 3. 12V 3. USB DATA D- 6.

  • Page 89: Pcb Diagrams (Sub Pba)

    This document can not be used without Samsung’s authorization. 5. PCB Diagrams 5-4 PCB Diagrams (SUB PBA) Parts No. Part Name Function and Rule This is connector which is connected with Main CN200 Main Communication Connector PCB to communicate. This is connector which is connected with lower CN501 Lower Oven Knob Backlight Connector oven knob backlight circuit.
  • Page 90 This document can not be used without Samsung’s authorization. 5. PCB Diagrams PCB Diagrams (SUB PBA) ▶ CN501 ▶ CN500 1. 5V 1. 5V 2. GND 2. GND 3. LOWER KNOB BACKLIGHT LED-DIO ▶ CN800 3. UPPER KNOB BACKLIGHT LED-DIO 4.

  • Page 91: Wiring Diagram

    This document can not be used without Samsung’s authorization. 6. Wiring Diagram 6. Wiring Diagram 6-1 Schematic diagram (Upper oven)

  • Page 92: Schematic Diagram (Lower Oven)

    1) CIRCUIT SHOWN WITH ALL CONTROLS SET TO OFF BLACK 2) OVEN DOOR OPENED AND UNLOCKED WHITE BROWN 3) WATER RESERVOIR INPUTTED AND LOCATED INSIDE MODEL: NQ70M9770* YELLOW BLUE (DACOR COMBI OVEN) ORANGE VIOLET GREEN WHT (N) BLK (L1) RED (L2) BROIL (RY202) BROIL HEATER (240V/4400W)
  • Page 93 Printed in Korea...

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