Samsung M245 User Manual

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MICROWAVE OVEN

M245

SERVICE

Manual

MICROWAVE OVEN CONTENTS

M245

lbs.

kg

oz.

g

h

10min

min

1min

Auto

Auto

10s.

1min+

M

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

TRADING & SERVICE

Questions and Answers:

K
Kathleen BooneAug 20, 2025
Why is my Samsung Microwave Oven timer running but not heating?
- A
  ahansonAug 20, 2025
  If your Samsung Microwave Oven isn't heating food properly but the timer is running, and the oven lamp and fan are working, it could be due to misaligned latch switches or a loose connection in the high voltage circuit, particularly the magnetron filament circuit. Try adjusting the door and latch switches. Also, inspect the high voltage components and replace any that are defective. If needed, replace the main PCB.
D
Dale SuttonAug 22, 2025
Why can I program my Samsung M245 but the timer won't start?
- S
  Stephanie RhodesAug 22, 2025
  If your Samsung Microwave Oven can be programmed, but the timer won't start, it could be due to open or loose wiring of the secondary interlock switch, misalignment of the primary interlock, or a defective secondary interlock switch. Try adjusting the door and interlock switches.
L
Leah FloresAug 25, 2025
How to fix a Samsung M245 Microwave Oven when the turntable motor does not rotate?
- M
  murphyjoshuaAug 25, 2025
  If your Samsung Microwave Oven's turntable motor isn't rotating, it might be due to an open or loose wiring connection to the turntable motor, or the turntable motor itself may be defective. Consider replacing the turntable motor.
J
James PerkinsAug 27, 2025
Why Samsung Microwave Oven has no display and doesn't work, and the fuse is blown?
- J
  James HoltAug 27, 2025
  If your Samsung Microwave Oven is completely unresponsive with no display and no operation, and the fuse is blown, it could be due to 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. Check the adjustment of the primary, interlock monitor, and door sensing switches.
M
Matthew OwensAug 28, 2025
Why does my Samsung Microwave Oven cook unevenly?
- E
  Edward AllenAug 28, 2025
  Uneven cooking in your Samsung Microwave Oven may result from the microwave's inherent characteristics, causing uneven intensity. To mitigate this, wrap thinner parts of the food with aluminum foil. Use plastic wrap or cover with a lid. For foods like soup, cocoa, or milk, stir once or twice during cooking.
S
Steven WalshAug 30, 2025
Samsung M245 Microwave Oven is dead, fuse is OK. What could be the reason?
- J
  Jillian WallaceAug 30, 2025
  If your Samsung Microwave Oven is completely dead, showing no display and not operating at all, even with a good fuse, it could be due to an open or loose lead wire harness, an open thermal cutout (magnetron), an open low voltage transformer, or a defective PCB assembly. When the thermal cutout is defective, check the fan motor. If the LVT is defective, check the PCB assembly.
A
Amanda McmillanSep 1, 2025
What to do if Samsung Microwave Oven does not accept key input (Program)?
- B
  Brandi EricksonSep 1, 2025
  If your Samsung Microwave Oven does not accept key inputs for programming, it could be due to the key input not being in sequence, an open or loose connection of the membrane keypad to the PCB assembly, a shorted or open membrane panel, or a defective PCB assembly. Refer to the operation procedure and replace the main PCB.
J
josephgibsonSep 3, 2025
Why Samsung Microwave Oven does not operate and returns to the plugged in mode?
- L
  Lawrence GomezSep 3, 2025
  If your Samsung Microwave Oven does not operate and returns to the plugged-in mode, the cause might be a defective PCB assembly. Replace the main PCB.
D
Danny PayneSep 5, 2025
What to do if my Samsung M245 Microwave Oven is sparking?
- M
  Michael RoseSep 5, 2025
  Sparks inside your Samsung Microwave Oven are often caused by metallic ware or cooking dishes touching the oven wall. Ceramic ware trimmed with gold or silver powder can also cause sparks. Avoid using any cookware with metallic trimming.
E
eddie95Sep 7, 2025
Why does my Samsung Microwave Oven make a loud buzzing noise?
- B
  Brian BellSep 7, 2025
  Loud buzzing noises in your Samsung Microwave Oven can be caused by loose fan components (fan or fan motor), loose screws on the high-voltage transformer, or a shorted high-voltage diode. Try tightening the screws on the fan motor and the high-voltage transformer. If the noise persists, replace the high-voltage diode.

Samsung M245 Specifications

General

Type	Countertop
Power Levels	10
Turntable	Yes
Color	Black
Child Safety Lock	Yes
Warranty	1 Year Limited
Installation	Free-Standing

Summary

Precaution

1-1 Safety precautions

Essential safety measures for handling and repairing the microwave oven.

1-2 Special Servicing Precautions

Additional safety guidelines for technicians during repair.

1-3 Special High Voltage Precautions

Critical warnings and procedures for dealing with high voltage components.

Specifications

2-1 Table of Specifications

Detailed technical specifications for the microwave oven model.

2-2 Comparison Chart

Comparison of features across different models or configurations.

Operating Instructions

3-1 Control Panel

Explanation of the control panel layout and buttons.

3-2 Features & External Views

Visual overview of the microwave oven's external features and dimensions.

Disassembly and Reassembly

4-1 Replacement of Magnetron, Motor Assembly and Lamp

Step-by-step guide for replacing key internal components.

4-2 Replacement of High Voltage Transformer

Procedure for safely replacing the high voltage transformer.

4-3 Replacement of Door Assembly

Instructions for disassembling and reassembling the oven door.

4-4 Replacement of Fuse

Procedure for replacing the internal fuse.

4-5 Replacement of Drive Motor

Guide for replacing the drive motor assembly.

4-6 Replacement of Control Circuit Board

Steps for replacing the main control circuit board.

Alignment and Adjustments

5-1 High Voltage Transformer

Testing and alignment for the high voltage transformer.

5-2 Low Voltage Transformer

Testing and continuity checks for the low voltage transformer.

5-3 Magnetron

Procedures for checking magnetron continuity and function.

5-4 High Voltage Capacitor

Testing procedures for the high voltage capacitor.

5-5 High Voltage Diode

Method for checking the high voltage diode's resistance.

5-6 Main Relay and Power Control Relay

Checking continuity of main and power control relays.

5-7 Adjustment of Primary Switch, Door Sensing Switch and Monitor Switch

Adjusting safety interlock switches for proper door closure.

5-8 Output Power of Magnetron

Procedure for measuring magnetron output power via temperature rise.

5-9 Microwave Heat Distribution - Heat Evenness

Method for checking microwave heat distribution uniformity.

5-10 Procedure for Measurement of Microwave Energy Leakage

Detailed steps for measuring microwave energy leakage.

5-11 Check for Microwave Leakage

Performing a basic check for microwave leakage.

5-12 Note on Measurement

Important notes and precautions for accurate measurement procedures.

5-13 Leakage Measuring Procedure

Procedures for recording and reporting leakage measurements.

Troubleshooting

6-1 Electrical Malfunction

Troubleshooting electrical issues and common malfunctions.

6-1 Electrical Malfunction(continued)

Continuation of electrical malfunction troubleshooting.

Exploded Views and Parts List

7-1 Exploded Views

Visual diagrams showing the assembly of components.

7-2 Main Parts List

List of main components with part numbers and specifications.

7-3 Door Parts List

Specific parts list for the oven door assembly.

7-4 Control Parts List

Parts list for the control panel and associated components.

7-5 Body Latch Parts List

Parts list for the body latch mechanism.

7-6 Standard Parts List

List of standard hardware and common parts used.

P.C.B Diagrams

8-1 P.C.B Diagram

Schematic diagram of the main printed circuit board.

8-2 P.C.B Parts List

List of components found on the printed circuit board.

Schematic Diagrams

9-1 Schematic Diagram

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

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