Samsung MW5480W - User Manual

Questions and Answers

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ethanthomasAug 20, 2025
Why does my Samsung Microwave Oven timer start but there is no heat?
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  polsonAug 20, 2025
  If the timer on your Samsung Microwave Oven counts down, but there's no heat, even though the oven lamp and fan motor are running, several factors could be responsible. There might be off-alignment of the latch switches, or an open or loose connection in the high voltage circuit, especially the magnetron filament circuit. Also, defective high voltage components like the H.V.Transformer, H.V.Capacitor, H.V.Diode, or Magnetron could be the reason. Other potential causes include open or loose wiring of the power relay, a defective primary latch switch, or a defective power relay or Ass'y PCB. You should adjust the door and latch switches and check the high voltage components; replace them if defective. Replacing the PCB main may also resolve the problem.
M
Matthew HansonAug 22, 2025
What to do if my Samsung MW5480W does not accept key input?
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  Christopher WilsonAug 22, 2025
  If your Samsung Microwave Oven isn't accepting key inputs for programming, it could be due to a few reasons: the key input might not be in the correct sequence, there could be an open or loose connection of the membrane keypad to the Ass'y PCB, the membrane panel could be shorted or open, or the Ass'y PCB could be defective. Refer to the operation procedure and consider replacing the PCB main.
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tammyyoungAug 25, 2025
Why can I program my Samsung Microwave Oven, but the timer won't start?
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  Alyssa GriffinAug 25, 2025
  If your Samsung Microwave Oven can be programmed but the timer doesn't start, it could be due to 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.
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Nicole SchneiderAug 26, 2025
Why is the microwave output low on my Samsung MW5480W?
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  Heidi BarkerAug 26, 2025
  If your Samsung Microwave Oven's output is low and it takes longer to cook food, it could be due to a decrease in the power source voltage, open or loose wiring in the magnetron filament circuit potentially causing intermittent oscillation, or the magnetron aging. It's recommended to consult an electrician.
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nicholasmorganAug 28, 2025
Why does my Samsung MW5480W stop during cooking?
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  Jessica EsparzaAug 28, 2025
  If your Samsung Microwave Oven stops operating during cooking, it might be due to an open or loose wiring of the primary interlock switch or the operation of the thermal cutout(Magnetron). Adjust the door and latch switches.
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judyharrellAug 30, 2025
Why is the turntable not rotating in my Samsung MW5480W?
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  Emily OrtegaAug 30, 2025
  If the turntable motor in your Samsung Microwave Oven isn't rotating, it could be due to open or loose wiring of the turntable motor, or a defective turntable motor. Check the wire of the turntable motor and replace the turntable motor.
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Kristina AyersSep 1, 2025
How to fix uneven cooking in my Samsung MW5480W Microwave Oven?
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  Suzanne EvansSep 1, 2025
  Uneven cooking in your Samsung Microwave Oven may be due to the uneven intensity of microwave because of 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.
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Amy MillsSep 3, 2025
What to do if my Samsung Microwave Oven has no display and the fuse is blown?
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  Joanna PettySep 3, 2025
  If your Samsung Microwave Oven has no display and isn't working, and the fuse is blown, the issue could stem from several causes. It might be a shorted lead wire harness, a defective primary latch switch, a defective monitor switch, a shorted high-voltage capacitor, or a shorted high-voltage transformer. You should check the adjustment of the primary, interlock monitor, and door sensing switch.
S
Scott SanchezSep 5, 2025
What to do if my Samsung MW5480W is dead but the fuse is OK?
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  Jennifer MoralesSep 5, 2025
  If your Samsung Microwave Oven is completely dead, the fuse is fine, there's no display, and it's not operating, it could be due to several reasons: an open or loose lead wire harness, an open thermal cutout (Magnetron), an open low voltage transformer, or a defective Ass'y PCB. Check the fan motor when the thermal cutout is defective, and check the Ass'y PCB when the LVT is defective.
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Joe WernerSep 7, 2025
Why is my Samsung MW5480W Microwave Oven making a loud buzzing noise?
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  wlewisSep 7, 2025
  If you hear a loud buzzing noise from your Samsung Microwave Oven, it could be due to loose fan and 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

Precaution

Servicing Safety Precautions

Safety measures for servicing to avoid exposure to excessive microwave energy.

General Safety Precautions

Detailed safety guidelines and warnings for microwave oven servicing.

Special Servicing Precautions

Further safety advice for servicing, including continuity checks and component replacement.

High Voltage Precautions

Critical warnings and procedures related to high voltage components and discharge.

Specifications

Technical Specifications Table

Technical specifications for microwave oven models MW5480W/MW5481G/MW5380W/MW5381G.

Model Feature Comparison

Feature comparison chart for different microwave oven models.

Operating Instructions

Control Panel Overview

Overview and function of buttons and indicators on the microwave control panel.

External Features and Dimensions

Diagrams illustrating the external features and dimensions of the microwave oven.

Disassembly and Reassembly

Magnetron, Motor, Lamp Replacement

Step-by-step guide for removing and replacing key internal components like the magnetron.

High Voltage Transformer Replacement

Procedure for safely removing and replacing the high voltage transformer.

Door Assembly Replacement

Instructions for disassembling and replacing the microwave oven door and its components.

Fuse and Drive Motor Replacement

Procedures for replacing the main fuse and turntable drive motor.

Control Circuit Board Replacement

Guide for removing and replacing the main control circuit board and related assemblies.

Alignment and Adjustments

High Voltage Transformer Testing

Testing continuity and resistance of the high voltage transformer.

Low Voltage Transformer Testing

Checking continuity and resistance of the low voltage transformer.

Magnetron Continuity Check

Continuity checks for diagnosing magnetron filament or short circuit issues.

High Voltage Capacitor and Diode Testing

Procedure for checking high voltage capacitor and diode resistance.

Switch Adjustment Procedures

Adjusting interlock and door sensing switches for proper alignment and operation.

Magnetron Output Power Measurement

Method for measuring magnetron output power using a water temperature rise test.

Heat Distribution Evenness Check

Procedure to check heat distribution evenness by measuring water temperature in beakers.

Microwave Energy Leakage Measurement

Steps to measure microwave energy leakage using a survey meter and spacer cone.

Leakage Measuring Procedures and Records

Procedures for checking leakage and record-keeping after repairs.

Troubleshooting

Electrical Malfunction Diagnosis

Diagnosing and correcting electrical malfunctions based on symptoms like 'Oven is dead' or 'Fuse is blown'.

Continued Electrical Malfunction

Troubleshooting common electrical issues such as lamp/fan motor not working or low microwave output.

Exploded Views and Parts List

Exploded Component Views

Diagrams showing the assembly of microwave oven components with reference numbers.

Main Parts Identification

List of main parts with part numbers, descriptions, quantities, and remarks.

Door and Control Parts Lists

Lists of parts for the door assembly, control panel, and body latch mechanism.

Standard Parts and Hardware

List of standard hardware components like screws, washers, and fasteners.

P.C.B Diagrams

Printed Circuit Board Layout

Schematic diagram of the main Printed Circuit Board (PCB) with component labels.

PCB Component Parts List

List of components used on the Printed Circuit Board (PCB) with part numbers.

Schematic Diagrams

Overall System Schematic

Overall schematic diagram of the microwave oven's electrical system.

Samsung MW5480W Specifications

General

Type	Microwave oven
Installation	Countertop
Turntable	Yes
Interior light	Yes
Built-in display	Yes
Clock	Yes
Timer	Yes
Product colour	White
Depth	404 mm
Weight	15 kg
Grill Function	No
Convection Function	No
Auto Cook Menu	Yes
Child Lock	Yes