LG CDMW12MW Built in Microwave Oven Owner’s Manual

LG CDMW12MW Built in Microwave Oven

Product Information

Specifications:

• Model: LG CDMW12MW
• Type: Microwave
• Manufacturer: LG
• Compatible Models: 955 models

Product Usage Instructions

Installation:
Follow the installation instructions provided in the owner’s manual. Ensure the microwave is placed on a flat, stable surface with proper ventilation.

Power Connection:
Connect the microwave to a power outlet that meets the electrical requirements specified in the manual. Avoid using extension cords.

Setting the Clock:
Refer to the manual to set the clock on your LG CDMW12MW microwave. This is usually done by pressing the designated clock button and inputting the correct time.

Operating the Microwave:
Follow the cooking instructions provided in the manual for different types of food. Use the appropriate power levels and cooking times as recommended.

Cleaning and Maintenance:
Regularly clean the interior and exterior of the microwave with a mild detergent and soft cloth. Ensure the microwave is unplugged before cleaning.

Frequently Asked Questions

• Can I use metal utensils in the microwave?
  No, it is not safe to use metal utensils in the microwave as they can cause arcing and damage to the appliance.

• How do I defrost food using this microwave?
  To defrost food, refer to the manual for specific instructions on using the defrost function. Typically, you will need to input the weight of the food and follow the prompts on the display.

• What should I do if my microwave is not heating food properly?
  If your microwave is not heating food properly, first check that you are using appropriate cookware and following recommended cooking times. If issues persist, contact customer support for assistance.

SAFETY PRECAUTIONS

This device is to be serviced only by properly qualified service personnel.
Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy.

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

• Do not operate or allow the oven to be operated with the door open.
• Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source, and make repairs as necessary; (1) interlock operation, (2) proper door closing, (3) seal and sealing surfaces (arcing, wear, and other damage), (4) damage to or loosening of hinges and latches, (5) evidence of dropping or abuse.
• Before turning on microwave power for any service test or inspection within the microwave generating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, integrity, and connections.
• Any defective or misadjusted components in the interlock, monitor, door seal, and microwave generation and transmission systems shall be repaired, replaced, or adjusted by procedures described in this manual before the oven is released to the owner.
• A microwave leakage check to verify compliance with the Federal Performance Standard should be performed on each oven prior to release to the owner.

SPECIFICATIONS

CAUTIONS
Unlike other appliances, the microwave oven is high-voltage and high-current equipment. Though it is free from danger in ordinary use, extreme care should be taken during repair.

• DO NOT operate on a 2-wire extension cord during repair and use.
• NEVER TOUCH any oven components or wiring during operation.
• BEFORE TOUCHING any parts of the oven, always remove the power plug from the outlet.
• For about 30 seconds after the oven stops, an electric charge remains in the high voltage capacitor. When replacing or checking, you must discharge the high voltage capacitor by shorting across the two terminals with an insulated screwdriver.
• Remove your watch whenever working close to or replacing the Magnetron.
• DO NOT touch any parts of the control panel circuit. A resulting static electric discharge may damage this P. C.B.
• NEVER operate the oven with no load.
• NEVER injure the door seal and front plate of the oven cavity.
• NEVER put iron tools on the magnetron.
• NEVER put anything into the latch hole and the interlock switches area.

MICROWAVE RADIATION
Personnel should not be exposed to the microwave energy which may radiate from the magnetron or other microwave generating device if it is improperly used or connection. All input and output microwave connections, waveguide, flange, and gasket must be secure. Never operate the device without a microwave energy absorbing load attached.
Never look into an open waveguide or antenna while the device is energized.

• Proper operation of the microwave oven requires that the magnetron be assembled to the waveguide and cavity. Never operate the magnetron unless it is properly installed.
• Be sure that the magnetron gasket is properly installed around the dome of the tube whenever installing the magnetron.
  THE OVEN IS TO BE SERVICED ONLY BY PROPERLY QUALIFIED SERVICE PERSONNEL.

INSTALLATION

BEFORE YOU BEGIN, READ THE FOLLOWING INSTRUCTIONS COMPLETELY AND CAREFULLY.

INSTALLING

1. Empty the microwave oven and clean inside it with a soft, damp cloth. Check for damage such as misaligned door, damage around the door or dents inside the cavity or on the exterior.
2. Put the oven on a counter, table, or shelf that is strong enough to hold the oven and the food and utensils you put in it. (The control panel side of the oven is the heavy side. Use care when handling.)
3. Do not block the vent and the air intake openings. Blocking vent or air intake openings can cause damage to the oven and poor cooking results. Make sure the microwave oven legs are in place to ensure proper air flow.
4. The oven should not be installed in any area where heat and steam are generated, because they may damage the electronic or mechanical parts of the unit. Do not install the oven next to a conventional surface unit or above a conventional wall oven.
5. Use microwave oven in an ambient temperature less than 104° F(40° C).
6. Place the microwave oven on a sturdy and flat surface at least 10 cm(4 inches) from the wall.
7. Place the microwave oven as far away as possible from TV, RADIO, COMPUTER, etc., to prevent interference.

GROUNDING INSTRUCTIONS

• For personal safety, this appliance must be fully grounded at all times.

• In the event of an electrical short circuit, grounding reduces the risk of electrical shock.

• The plug must be plugged into an outlet that is properly installed and grounded.
  WARNING

  • Improper use of the grounding plug can result in a risk of electric shock.
  • Do not, under any circumstances, cut or remove the third ground prong from the power cord plug.

OPERATING INSTRUCTIONS

FEATURES

CONTROL PANEL

1. DISPLAY WINDOW: Shows program selections and displays cooking modes.
2. ONE TOUCH COOK : Automatically determines time requirement to cook food easily.
3. QUICK DEFROST: Used to thaw only 1 lb of food very quickly.
4. AUTO DEFROST: Used to set Automatic Defrost by weight.
5. TIME: Used to set manual time cooking.
6. STOP/ CLEAR : Clears all previous settings if pressed before cooking starts. During cooking: touch once to stop oven; twice to stop and clear all entries except clock.
7. (Clock) TIME OF DAY : Used to set clock.
8. ONE TOUCH REHEAT: Automatically determines time requirement to reheat food and beverage.
9. USER CHOICE: Used to select sound (on/off), clock(on/off), scroll speed (slow, normal, fast) and uni t(lbs ./kg.).
10. ADD 30: Used to quick set and start microwave cooking without the need to touch ST ART.
11. Number Key Pads: Used to set time and power level.
12. POWER CONTROL: Used to set cooking power levels.
13. START: Starts the oven.

SCHEMATIC DIAGRAM

CIRCUIT DESCRIPTION

GENERAL DETAILS

• The low voltage transformer supplies the necessary voltage to the micom controller when power cord is plugged in.
• When the door is closed, the primary switch is ON, the secondary switch is ON, and the monitor switch opens (contact COM and NO).

WHEN SELECTING COOKING POWER LEVEL AND TIME

• The micom controller memorizes the function you set.
• The time you set appears in the display window.
• Each indicator light turns on to indicate that the stage has been set.

WHEN TOUCHING THE START PAD

• The coil of the relay is energized by the micom controller.
• Power input is supplied to the high voltage transformer through the fuse to the primary switch and relay 2.
• Turntable rotates.
• The fan motor rotates and cools the magnetron by blowing the air (coming from the intake on the base­plate).
• The air is also directed into the oven to exhaust the vapoI in the oven through the upper plate.
• Cooking time starts counting down.
• 3.3 volts AC is generated from the filament winding of the high voltage transformer. This 3.3 volts is applied to the magnetron to heat the magnetron filament th1ough two noise-preventing choke coils.
• A high voltage of approximately 2100 volts AC is generated in the secondary of the high voltage transformer which is increased by the action of the high voltage diode and charging of the high voltage capacitor.
• The negative 4,000 Volts DC is applied to the filament of the magnetron.

WHEN THE OVEN IS SET AT ANY LEVEL EXCEPT MAXIMUM.

• The micom controller controls the ON-OFF time of relay 2 by the applied signal to vary the average output power of microwave oven as POWER LEVEL. (refer to page 1-1)
• One complete cycle of relay 2 is 22 seconds.

WHEN THE DOOR IS OPENED DURING COOKING

• Both the primary switch and relay 2 cut off the primary winding voltage of the high voltage transformer.
• ON-OFF of relay 2 is coupled electrically with opening and closing of the secondary switch.
• When the door is opened, the secondary switch is opened and when the door is closed, the secondary switch is closed.
• The cooking time stops counting down.
• Relay stops functioning.
• As the door is opened, if the contact of primary switch and relay2 and/or secondary switch fail to open, the fuse opens due to the large current surge caused by the monitor switch activation, which in turn stops magnetron oscillation.

SERVICE INFORMATION

TOOLS AND MEASURING INSTRUMENTS

NECESSARY TOOLS
Tools normally used for TV servicing are sufficient.
Standard tools are listed below.

• Diagonal pliers
• Long nose pliers
• Phillips screwdriver
• Flat blade screwdriver
• Wrench (size 5mm)
• Nutdriver (size 5mm)
• Adjustable wrench
• Soldering iron
• Solder
• Vinyl insulation tape
• Polishing cloth

NECESSARY MEASURING INSTRUMENTS

• TESTER (VOL TS-DC, AC, Ohmmeter)
• Microwave survey meter
  • Holaday
  • Hl-1500
  • Hl-1501
  • Narda
  • 8100
  • 8200
• Inch scale
• 600 cc non conductive material beaker (glass or plastic), inside diameter: approx. 8.5 cm (31 12 in.)
• Cylindrical and made of borosilicate glass vessel.
  • max. thickness : 3 mm
  • outside diameter : approx. 190mm
  • height: approx. 90mm
• Glass thermometer: 100 ° c or 212 ° F (1 deg scale)

MICROWAVE LEAKAGE TEST

CAUTIONS

• Be sure to check microwave leakage prior to servicing the oven if the oven is operative prior to servicing.

• The service personnel should inform the manufacture importer, or assembler of any certified oven unit found to have a microwave emission level in excess of 5 mW/cm2 and should repair any unit found to have excessive emission levels at no cost to the owner and should ascertain the cause of the excessive leakage. The service personnel should instruct the owner not to use the unit until the oven has been brought into compliance.

• If the oven operates with the door open, the service personnel should:

  • Tell the user not to operate the oven.

  • Contact the manufacturer and CDRH (Center for Devices and Radiological Health) immediately.
    NOTE: Address on CDRH

  • Office of Compliance(H FZ-312)

  • Center for Devices and Radiological

  • Health 1390, Piccard Drive,

  • Rockville. MD 20850

• The service personnel should check all surface and vent openings for- microwave leakage.

• Check for microwave leakage after every servicing. The power density of the microwave radiation leakage emitted by the microwave oven should not exceed 4 mW/cm2 Always start measuring of an unknown field • to assure safety for operating personnel from radiation leakage.

MEASURING MICROWAVE ENERGY LEAKAGE

• Pour 275±15cc of 20±5 ‘C (68±9 “f) water in a beaker which is graduated to 600 cc, and place the beaker on the center of the turntable.
• Set the energy leakage monitor to 2,450 MHz and use it following the manufacturer’s recommended test procedure to assure correct result.
• When measuring the leakage, always use the 2-inch (5cm) spacer supplied with the probe.
• Operate the oven at its maximum output.
• Measure the microwave radiation using an electromagnetic radiation monitor by holding the probe perpendicular to the surface being measured.

MEASUREMENT WITH OUTER CASE REMOVED

• When you replace the magnetron, measure for microwave energy leakage before the outer case is installed and after all necessary components are replaced or adjusted. Special care should be taken in measuring the following parts. (Circled area of Fig. below)
  • Around the magnetron
  • The waveguide
    WARNING : AVOID CONTACTING ANY HIGH VOLTAGE PARTS

MEASUREMENT WITH A FULLY ASSEMBLED OVEN

• After all components, including the outer case, are fully assembled, measure for microwave energy leakage around the door viewing window, the exhaust opening, and air inlet openings.
• Microwave energy leakage must not exceed the values prescribed below.
  NOTE: Leakage with the outer case removed less than 5 mW/cm.sq. Leakage for a fully assembled oven (Before the latch switch (primary) is inte1Tupted) with the door in a slightly opened position-less than 2 mW/cm.sq.

NOTES WHEN MEASURING

• Do not exceed meter full scale deflection.
• The test probe must be moved no faster than 1 inch/sec (2.5 cm/sec) along the shaded area, otherwise a false reading may result.
• The test probe must be held by the grip portion of the handle. A false reading may result if the operator’s hand is between the handle and the probe.
• When testing near a corner of the door, keep the probe perpendicular to the surface making sure the probe horizontally along the oven surface. Hold vertically when testing the top and bottom, and horizontally along.

RECORD KEEPING AND NOTIFICATION AFTER MEASUREMENT

• After adjustment and repair of any microwave energy interruption or microwave energy blocking device, record the measured values for future reference. Also enter the information on the service invoice.
• The microwave energy leakage should not be more than 4 mW/cm.sq. after determining that all parts are in good condition, functioning properly and genuine replacement parts which are listed in this manual have been used.
• At least once a year, have the electromagnetic energy leakage monitor checked for calibration by its manufacturer.

SPECIAL TIP

• This oven used the button head screws.
• When you remove the screws, use the tamper-resistant Torx driver having a pin-in-head.

MEASUREMENT OF MICROWAVE POWER OUTPUT

• Microwave power output measurement is made with the microwave oven supplied at its rated voltage and operated at its maximum microwave power setting with a load of (1000±5) g of potable water.

• The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190mm.

• The oven and the empty vessel are at ambient temperature prior to the start of the test.

• The initial temperature (T1) of the water is (10±2) ° C It is measured immediately before the water is added to the vessel. After addition of the water to the vessel, the load is immediately placed on the center of the turntable which is in the lowest position and the microwave power switched on.

• The time T for the temperature of the water to rise by a value? T of (10±2) 0 is measured, where Tis the time in seconds and ?T is the temperature rise. The initial and final water temperatures are selected so that the maximum difference between the final water temperature and the ambient temperature is 5 ° .

• The microwave power output P in watts is calculated from the following formula
  is measured while the microwave generator is operating at full power. Magnetron filament heat-up time is not included. (about 3 sec)

• The water is stirred to equalize temperature throughout the vessel, prior to measuring the final water temperature.

• Stirring devices and measuring instruments are selected in order to minimize addition or removal of heat.

DISASSEMBLY AND ADJUSTMENT

OUTER CASE REMOVAL

1. Disconnect the power supply cord from the outlet.
2. Remove the screws from the rear of the case. The outer case must be moved backward to be lifted off.

POWER SUPPLY CORD

1. Remove the outer case.
2. Disconnect two terminals and remove one screw of the ground terminal.

CONTROL PANEL ASSEMBLY

1. Open the door.
2. Disconnect the lead wire from RELAY (RY2) of the PCB SUB ASS EMBLY.
3. Disconnect the lead wire from connector (CN1) of the PCB SUB ASSEMBLY.
4. Remove screw which hold the controller assembly to the cavity.
5. Lift up and pull out control panel assembly carefully from the cavity.
   CAUTION: DISCHARGE THE HIGH VOLTAGE CAPACITOR BEFORE SERVICING (refer to page 2-1)

PCB ASSEMBLY REMOVAL

1. Remove the control panel assembly from the cavity. (Refer to control panel assembly removal on previous page.}
2. Remove screws which hold the PCB SUB ASSEMBLY to the control panel.
3. Disconnect the flat cable from the PCB SUB ASSEMBLY and take off the PCB SUB ASSEMBLY.

DOOR ASSEMBLY REMOVAL

1. Open the door.

2. Remove the choke cover very carefully with a flat-blade screwdriver.
   CAUTION: Be careful not to damage door seal plate by screwdriver.

3. Lift up and push the door.
   NOTE:

4. After replacing the door, be sure to check that the primary switch, monitor switch, and secondary switch operate normally.

5. After replacing the door, check for microwave energy leakage with a survey meter. Microwave energy must be below the limit of 4 mW/cm2 (with a 275 ml water load}

6. When mounting the door assembly to the oven assembly, be sure to adjust the door assembly parallel to the chassis. Also, adjust so the door has no play between the inner door surface and oven frame assembly. If the door assembly is not mounted properly, microwaves may leak from the clearance between the door and the oven.

MAGNETRON REMOVAL

1. Disconnect the lead wire from the magnetron.

2. Carefully remove the mounting screws holding the magnetron and the waveguide.

3. Remove the magnetron ASSEMBLY until the tube is clear from the waveguide.
   NOTE:

4. When removing the magnetron, make sure its dome does not hit any adjacent parts, or it may be damaged.

5. When replacing the magnetron, be sure to install the magnetron gasket in the correct position and be sure that the gasket is in good condition.

6. After replacing the magnetron, check for microwave leakage with a survey meter around the magnetron. Microwave energy must be below the limit of 5 mW/cm2. (With a 275 ml. water load). Make sure that gasket is rigidly attached to the magnetron. To prevent microwave leakage, tighten the mounting screws properly, making sure there is no gap between the waveguide and the magnetron.

REMOVING THE TURNTABLE MOTOR

1. Remove the turntable and rotating ring.

2. Lay the unit down on its back.

3. Remove the turntable motor cover. The turntable base cover is easily removed by pinching the eight parts with a wire cutting.

4. Disconnect the leadwire from the turntable motor terminals.

5. Remove the screw securing the turntable motor to the oven cavity ASSEMBLY.

6. After repairing the motor, rotate the removed turntable motor cover.

7. Fit the turntable motor cover’s projecting part to the base plate slit.
   NOTE:

8. Remove the wire lead from the turntable motor VERY CAREFULLY.

9. Be sure to grasp the connector, not the wires, when removing.

HIGH VOLTAGE TRANSFORMER REMOVAL

1. Discharge the high voltage capacitor.
2. Disconnect the lead wire from magnetron, high voltage transformer, and capacitor.
3. Remove the screw holding the high voltage transformer to the baseplate.

FAN MOTOR ASSEMBLY REMOVAL

1. Discharge the high voltage capacitor.
2. Disconnect the lead wire from fan motor and high voltage capacitor.
3. Remove the screws holding the the suction guide ASSEMBLY to the oven cavity.
4. Remove the two screws holding the fan motor ASSEMBLY to the suction guide ASSEMBLY.

HIGH VOLTAGE CAPACITOR AND D IODE REMOVAL

1. Discharge the high voltage capacitor.
2. Disconnect the lead wire from fan motor and high voltage capacitor.
3. Remove the screw holding the suction guide ASSEMBLY to the oven cavity.
4. Remove the screw holding the high voltage capacitor bracket and remove the high voltage diode earth screw.

INTERLOCK SYSTEM

1. INTERLOCK MECHANISM The door lock mechanism is a device which has been specially designed to eliminate completely microwave activity when the door is opened during cooking and thus to prevent the danger resulting microwave leakage.
2. MOUNTING OF THE PRIMARY/MONITOR/ SECONDARY SWITCHES TO THE LATCH BOARD
3. INSTALLATION AND ADJUSTMENT OF THE LATCH BOARD TO THE OVEN ASSEMBLY
   • Mount the latch board to the oven assembly.
   • Adjust the latch board so that oven door will not have any play in it when the door is closed.
   • Tighten the mounting screw.
   • Check for play in the door by pushing the door release button. Door movement should be less than 0.5 mm. (1 /64 inch)
     Don’t push the door release button while making this adjustment. Make sure that the latch moves smoothly after adjustment is completed and that the screws are tight. Make sure the primary, monitor, and secondary switches operate properly by following the continuity test procedure.

INTERLOCK CONTINUITY TEST

WARNING : FOR CONTINUED PROTECTION AGA INST EXCESSIVE RA DIATION EMISSION, REPLACE ONLY WITH IDENTICAL REPLACEMENT PARTS. ALL THESE SWITCHES MUST BE REPLACED AT THE SA ME TI ME.

• TYPE NO. SZM-V 16-FA-63 OR VP-533A-OF OR V-5230O FOR PRIMARY SWITCH
• TYPE NO. SZM-V 16-FA-62, VP-532A-OF OR V-5220O FOR MONITOR SWITCH
• TYPE NO. SZM-V 15-FA-63, VP-533A-OFF OR SECONDARY SWITCH

PRIMARY INTERLOCK SWITCH TEST

• When the door is opened slowly, an audible click should be heard at the same time or successively at intervals and the latches should activate the switches with an audible click.
• If the latches do not activate the switches when the door is closed, the switches should be adjusted in accordance with the adjustment procedure. Disconnect the wire lead from the primary switch. Connect the ohmmeter leads to the common (COM) and normally open (NO) terminal of the switch. The meter should indicate an open circuit in the door open condition. When the door is closed, the meter should indicate a closed circuit.
• When the primary switch operation is abnormal, make the necessary adjustment or replace the switch with the same type of switch.

SECONDARY INTERLOCK SWITCH TEST

• Disconnect the wire lead from the secondary switch.
  Connect the ohmmeter leads to the common (COM) and normally open (NO) terminals of the switch. The meter should indicate an open circuit in the door open condition. When the door is closed, the meter should indicate a closed circuit. When the secondary switch operation is abnormal, make the necessary adjustment or replace the switch with the same type of switch.

MONITOR SWITCH TEST
Disconnect the wire lead from the monitor switch. Connect the ohmmeter leads to the common (COM) and normally closed (NC) terminals of the switch. The meter should indicate closed circuit in the door open condition. When the door is closed, the meter should indicate an open circuit. When the monitor switch operation is abnormal, replace with the same type of switch.
NOTE: After repairing the door or the interlock system, it is necessary to do this continuity test before operating the oven.

COMPONENT TEST PROCEDURE
CAUTIONS

1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER. (SEE PAGE 2-1)
2. ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN.

TROUBLESHOOTING

WHEN YOU GET A COMPLAINT FROM YOUR CUSTOMER, EVALUATE THE COMPLAINT CAREFULLY. IF THE FOLLOWING SYMPTOMS APPLY, PLEASE INSTRUCT THE CUSTOMER IN THE PROPER USE OF THE MICROWAVE OVEN. THIS CAN ELIMINATE AN UNNECESSARY SERVICE CALL.

CAUTIONS

1. Check grounding before checking for trouble.
2. Be careful of the high voltage circuit.
3. Discharge the high voltage capacitor. (See page 2-1)
4. When checking the continuity of the switches or of the high voltage transformer, disconnect one lead wire from these parts and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
5. Do not touch any part of the circuit on the PCB since static electric discharge may damage this control panel. Always touch yourself to ground while working on this panel to discharge any static charge built up in your body. (Micom model only)

• The following visual conditions indicate a probable defective control circuit.

1. Incomplete segments.
  * Segment missing.
  * Partial segment missing.
  * Digit flickering (NOTE: Slight flickering is normal.)
2. Colon does not turn on or blink.
3. A distinct change in the brightness of one or more numbers in display.
4. One or more digits in the display are not lighting.
5. Display indicates a number different from one touched, for example, key in 5 and 3 appears in the display.
6. Specific numbers (for example 7 or 9) will not display when key pad is touched.
7. Display does not count down with time blinking or up with clock operation.
8. Display obviously jumps in time while counting down.
9. Display counts down too fast while cooking.
10. Each indicator light does not turn on after setting cooking cycle.
11. Display time of day does not reappear when cooking is finished.![LG-CDMW12MW-Built-in-Microwave-Oven-fig-29](https://manuals.plus/wp-content/uploads/2024/07/LG-CDMW12MW-Built-in-Microwave-Oven-fig-29.png)

• Oven does not operate at all, Display window does not display any figures, and no input is accepted.****  

NOTE : All these switches must be replaced at the same time. Refer to page 5-7, 5-8

• Display shows all figures set, but oven does not start cooking while desired program times are set and START pad is touched.****
• Oven seems to be operating but little heat is produced in oven load.****  

• No microwave oscillation even though oven lamp and fan motor run. (Display operates properly)****  

NOTE :

  * Make sure the wire leads correct position.
  * When Removing the wire leads from the parts, be sure to grasp the connector, not the wires.
  * When removing the magnetron, be sure to install the magnetron gasket in the correct position and in good condition.![LG-CDMW12MW-Built-in-Microwave-Oven-fig-35](https://manuals.plus/wp-content/uploads/2024/07/LG-CDMW12MW-Built-in-Microwave-Oven-fig-35.png)

EXPLODED VIEW

INTRODUCTION

DOOR

CONTROLLER

OVEN CAVITY

LATCH BOARD

INTERIOR

BASE PLATE

SCHEMATIC DIAGRAM OF PCB

PRINTED CIRCUIT BOARD

References

• Repair Your Grill: Shop Replacement Parts for 24,880 Models
• Lg Microwave Parts - Select From 955 Models

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