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Samsung SMH7174WE - User Manual

Samsung SMH7174WE
44 pages
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MICROWAVE OVEN
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
10. Reference
BASIC : SMH7174WD
SMH7174BD
MODEL : SMH7174WE
SMH7174BE

Table of Contents

Questions and Answers

  • F
    fgutierrezSep 10, 2025
    What does error1 mean on my Samsung Microwave Oven display?
    • D
      Debra SimsSep 10, 2025
      Error1 on your Samsung Microwave Oven display indicates a shorted sensor’s circuit. Let the oven cool for at least 5 minutes. Check the connection of the sensor to see if the sensor’s circuit was shorted by a foreign substance.
  • S
    Steven WilsonAug 23, 2025
    What to do if my Samsung SMH7174WE Microwave Oven does not accept key input?
    • L
      Lindsey WalkerAug 23, 2025
      If your Samsung Microwave Oven does not accept key input (program), it could be because the key input is not in sequence, there is an open or loose connection of the membrane key pad to the Ass’y PCB, a shorted or open membrane panel, or a defective Ass’y PCB. Refer to the operation procedure. Replace PCB main.
  • J
    jjohnsonAug 25, 2025
    What to do if my Samsung Microwave Oven can program but timer does not start?
    • C
      Cameron YoungAug 25, 2025
      If your Samsung Microwave Oven can program but the timer does not start, it could be due to an open or loose wiring of the secondary interlock switch, off-alignment of the primary interlock, or a defective secondary interlock S/W. Adjust the door and interlock switches.
  • G
    Gwendolyn WallaceAug 26, 2025
    Why is my Samsung SMH7174WE Microwave Oven taking longer to cook food?
    • Z
      zbenitezAug 27, 2025
      If your Samsung Microwave Oven is taking longer to cook food, it could be due to a decrease in the power source voltage, an open or loose wiring of the magnetron filament circuit, or the aging of the magnetron. It is recommended to consult an electrician.
  • S
    Sherry SanchezAug 28, 2025
    Why is my Samsung Microwave Oven cooking unevenly?
    • J
      Julie JonesAug 28, 2025
      Uneven cooking in your Samsung Microwave Oven is due to the uneven intensity of microwave due to its characteristics. Wrap thinner parts of the food with aluminum foil. Use plastic wrap or cover with a lid. Stir once or twice while cooking foods such as soup, cocoa, or milk.
  • S
    Sarah GutierrezAug 29, 2025
    Why is the turntable motor in my Samsung SMH7174WE not rotating?
    • B
      bellsarahAug 29, 2025
      If the turntable motor in your Samsung Microwave Oven does not rotate, it could be due to an open or loose wiring of the turntable motor or a defective turntable motor. Replace the turntable motor.
  • C
    cmillerSep 18, 2025
    Why is there noise from the turntable motor when it starts to operate in my Samsung Microwave Oven?
    • R
      Ralph MarshallSep 18, 2025
      Noise from the turntable motor when it starts to operate in your Samsung Microwave Oven may result from the motor itself. Replace the turntable motor.
  • K
    Kathryn BlakeSep 12, 2025
    What does error2 mean on my Samsung Microwave Oven display?
    • P
      pedro21Sep 12, 2025
      Error2 on your Samsung Microwave Oven display indicates an open sensor’s circuit. Check the connection of the sensor’s wire.
  • H
    Heather SmithSep 8, 2025
    What to do if my Samsung SMH7174WE stops during cooking?
    • J
      Johnathan JohnsonSep 8, 2025
      If your Samsung Microwave Oven stops operation during cooking, it could be due to an open or loose wiring of the primary interlock switch or the operation of thermal cutout (Magnetron). Adjust the door and latch switches.
  • S
    Stacy SerranoSep 5, 2025
    What to do if my Samsung SMH7174WE is making a loud buzzing noise?
    • B
      Benjamin SimsSep 5, 2025
      A loud buzzing noise from your Samsung Microwave Oven can be caused by a loose fan or fan motor, loose screws on the H.V.Transformer, or a shorted H.V.Diode. Tighten the screws of the fan motor and the H.V.Transformer. Replace the H.V.Diode.

Summary

1. Precaution

Microwave Energy Exposure Precautions

Critical safety guidelines to prevent excessive microwave energy exposure during servicing.

General Safety Precautions

Essential safety guidelines for servicing, covering electrical and radiation hazards.

Special Servicing Precautions

Additional safety measures and warnings for specialized servicing procedures.

High Voltage Precautions

Critical safety advice regarding high voltage components and their handling.

2. Specifications

4. Disassembly and Reassembly

High Voltage Transformer and Fan Motor Replacement

Procedure for replacing the high voltage transformer and fan motor assembly.

Magnetron Replacement

Steps for safely removing and replacing the magnetron assembly.

Main and HV Trans Fuse Replacement

Guide for replacing the main fuse and the high voltage transformer fuse.

Control Circuit Board Replacement

Detailed steps for replacing the main control circuit board.

5. Alignment and Adjustments

Magnetron Continuity Checks

Instructions for performing continuity checks on the magnetron.

Switch Adjustment and Checks

Guidance on adjusting and checking the function of interlock and monitor switches.

Magnetron Output Power Measurement

Procedure for measuring the magnetron's output power using a water temperature rise test.

Microwave Energy Leakage Measurement Procedure

Detailed steps for measuring microwave energy leakage using a survey meter.

Microwave Leakage Check

Steps to perform a basic check for microwave leakage.

6. Troubleshooting

Electrical Malfunctions

Table of common electrical malfunctions, their causes, and corrections.

7. Exploded Views and Parts List

Samsung SMH7174WE Specifications

General IconGeneral
BrandSamsung
ModelSMH7174WE
CategoryMicrowave Oven
LanguageEnglish

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