MICROWAVE OVEN

G2711N

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. Schematic Diagrams

NEC

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 the door open.

(b) 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.

(c) 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.

(d) 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.

(e) A Microwave leakage check to verify compliance with the Federal performance standard should be performed on each oven prior to release to the owner.

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.

1-1 Safety precautions ( )

1.

All repairs should be done in accordance with the procedures described in this manual. This product complies with

Federal Performance Standard 21 CFR.

Subchapter J(DHHS).

2.

Microwave emission check should be performed to prior to servicing if the oven is operative.

3. If the oven operates with the door open :

Instruct the user not to operate the oven and contact the manufacturer and the center for devices and radiological health immediately.

4. Notify the Central Service Center if the microwave leakage exceeds 5 mW/cm 2 .

5. Check all grounds.

6. Do not power the MWO from a "2-prong"

AC cord. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.

7. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.

8. Make sure that there are no cabinet openings through which people --particularly children --might insert objects and contact dangerous voltages. Examples: Lamp hole, ventilation slots.

9. Inform the manufacturer of any oven found to have emission in excess of 5 mW/cm 2 ,

Make repairs to bring the unit into compliance at no cost to owner and try to determine cause.

Instruct owner not to use oven until it has been brought into compliance.

CENTRAL SERVICE CENTER

10. Service technicians should remove their watches while repairing an MWO.

11. To avoid any possible radiation hazard, replace parts in accordance with the wiring diagram. Also, use only the exact replacements for the following parts:

Primary and secondary interlock switches, interlock monitor switch.

12. If the fuse is blown by the Interlock Monitor

Switch: Replace all of the following at the same time: Primary, door sensing switch and power relay, as well as the Interlock

Monitor Switch. The correct adjustment of these switches is described elsewhere in this manual. Make sure that the fuse has the correct rating for the particular model being repaired.

13. Design Alteration Warning:

Use exact replacement parts only, i.e., only those that are specified in the drawings and parts lists of this manual.

This is especially important for the

Interlock switches, described above.

Never alter or add to the mechanical or electrical design of the MWO. Any design changes or additions will void the manufacturer's warranty. Always unplug the unit's AC power cord from the AC power source before attempting to remove or reinstall any component or assembly.

14. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

15. Some semiconductor ("solid state") devices are easily damaged by static electricity.

Such components are called

Electrostatically Sensitive Devices (ESDs).

Examples include integrated circuits and field-effect transistors.

Immediately before handling any semiconductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground.

16. Always connect a test instrument's ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument's ground lead last.

- 1 -

1-2 Special Servicing Precautions (Continued)

17. When checking the continuity of the witches or transformer, always make sure that the power is OFF, and one of the lead wires is disconnected.

18. Components that are critical for safety are indicated in the circuit diagram by shading, or .

19. Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

1-3 Special High Voltage Precautions

1. 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)

2. The high-voltage capacitor remains charged about 30 seconds after disconnection. Short the negative terminal of the high-voltage capacitor to to the oven chassis. (Use a screwdriver.)

3. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

H. V. Capacitor

Short

H. V. Diode

Touch chassis ground first then short to the high voltage capacitor terminal by using screwdriver or jumper wire.

Fig. 1-1 Discharging High Voltage Capacitor

PRECAUTION

Never touch any circuit wiring with your hand nor with uninsulated tool during operation.

PRECAUTION

There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the

HIGH VOLTAGE TRANSFORMER secondary and filament terminals. It is extremely dangerous to work on or near these circuits with the oven energized.

DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron.

PRECAUTION

Servicemen should remove their watches whenever working close to or replacing the magnetron.

- 2 -

2. Specifications

2-1 Table of Specifications

TIMER

POWER SOURCE

POWER CONSUMPTION

MICROWAVE

Grill

Combined mode

OUTPUT POWER

OPERATING FREQUENCY

MAGNETRON

COOLING METHOD

OUTSIDE DIMENSIONS

OVEN DIMENSIONS

SHIPPING DIMENSIONS

SHIPPING WEIGHT APPROX.

35 MINUTES

230V ~50Hz

1100W

1000W

2100W

100W/750W (IEC-705)

2,450MHz

OM75S(31)

COOLING FAN MOTOR

489(W) x 275(H) x 392(D)

330(W) x 187(H) x 320(D)

557(W) x 329(H) x 451(D)

NET 15 kg

GROSS 15.0kg

- 3 -

3. Operating Instructions

3-1 Control Panel

3-2 Features & External Views

VENTILATION HOLES

LIGHT VARIABLE COOKING

POWER CONTROL KNOB

TIMER KNOB

DOOR LATCHES

DOOR

TURNTABLE

COUPLER

ROLLER RING

SAFETY

INTERLOCK HOLES

OPEN DOOR

PUSH BUTTON

342mm

489mm

- 4 -

206mm

374mm

4. Disassembly and Reassembly

4-1 Replacement of Magnetron, Motor Assembly and Lamp

Remove the magnetron including the shield case, permanent magnet, choke coils and capacitors (all of which are contained in one assembly).

1. Disconnect all lead wires from the magnetron and lamp.

2. Remove a screw securing air cover.

3. Remove the air cover.

4. Remove screws securing the magnetron to the wave guide.

5. Take out the magnetron very carefully.

6. Remove nuts from the back panel.

7. Take out the fan motor.

8. Remove the oven lamp by rotating to pull out from hole of air cover.

NOTE1: When removing the magnetron, make sure that its antenna does not hit any adjacent parts, or it may be damaged.

NOTE2: When replacing the magnetron, be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition.

4-2 Replacement of High Voltage Transformer

1. Discharge the high voltage capacitor.

2. Disconnect all the leads.

3. Remove the mounting bolts.

4. Reconnect the leads correctly and firmly.

PRECAUTION

Servicemen should remove their watches whenever working close to or replacing the magnetron.

PRECAUTION

There exists HIGH VOLTAGE ELECTRICITY with high current capabilities in the circuits of the HIGH

VOLTAGE TRANSFORMER secondary and filament terminals. It is extremely dangerous to work on or near these circuits with the oven energized.

DO NOT measure the voltage in the high voltage circuit including filament voltage of magnetron.

- 5 -

4-3 Replacement of Door Assembly

4-3-1 Removal of Door "C"

Insert flat screwdriver into the gap between Door

"A" and Door "C" to remove Door "C". Be careful when handling Door "C" because it is fragile.

Then remove the door assembly.

Door "A"

Door "C"

4-3-2 Removal of Door "E"

Following the procedure as shown in the figure, insert and bend a thin metal plate between Door

"E" and Door "A" until you hear the 'tick' sound.

1. Insertion depth of the thin metal plate should be

0.5mm or less.

4-3-3 Removal of Key Door & Spring

Remove pin hinge from Door "E"

Detach spring from Door "E" and key door.

Door "E"

- 6 -

4-3-4 Reassembly Test

After replacement of the defective component parts of the door, reassemble it and follow the instructions below for proper installation and adjustment so as to prevent an excessive microwave leakage.

1. When mounting the door to the oven, be sure to adjust the door parallel to the bottom line of the oven face plate by moving the upper hinge and lower hinge in the direction necessary for proper alignment.

2. Adjust so that the door has no play between the inner door surface and oven front surface. If the door assembly is not mounted properly, microwave energy may leak from the space between the door and oven.

3. Do the microwave leakage test.

4-4 Replacement of Fuse

1. Disconnect the oven from the power source.

2. When 12A fuse blows out by the operation of interlock monitor switch failure, replace the primary interlock switch, door sensing switch, monitor switch and power relay.

3. When the above three switches operate properly, check if any other part such as the control circuit board, blower motor or high voltage transformer is defective.

4-5 Replacement of Drive Motor

1. Take out the glass tray, guide roller and coupler from cavity.

2. Turn the oven upside down to replace the drive motor.

3. Remove a screw securing the drive motor cover.

4. Disconnect all the lead wires from the drive motor.

5. Remove screws securing the drive motor to the cavity.

6. Remove the drive motor.

7. When replacing the drive motor, be sure to remount it in the correct position.

8. Connect all the leads to the drive motor.

9. Screw the drive motor cover to the base plate with a screw driver.

10. Remount the coupler in the correct position.

Drive Motor Cover

Drive Motor

Base Plate

- 7 -

4-6 Replacement of Control Circuit Board

4-6-1 Removal of Control Box Assembly

1. Disconnect the connectors from the control box assembly.

2. Remove screws securing the control box assembly.

3. Remove the knobs of the control box A'ssy.

4. Remove the screw securing the timer.

CONTROL-BOX

SCREW

- 8 -

5. Alignment and Adjustments

PRECAUTION

1. High voltage is present at the high voltage terminals during any cook cycle.

2. It is neither necessary nor advisable to attempt measurement of the high voltage.

3. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the high voltage capacitor.

5-1 High Voltage Transformer

1. Remove connectors from the transformer terminals and check continuity.

2. Normal resistance readings are as follows:

Secondary

Filament

Primary

Approx. 151.5

Ω

Approx. 0

Ω

Approx. 2.5

Ω

(Room temperature = 20° C)

5-2 Magnetron

1. Continuity checks can indicate only an open filament or a shorted magnetron. To diagnose an open filament or shorted magnetron :

2. Isolate the magnetron from the circuit by disconnecting its leads.

3. A continuity check across the magnetron filament terminals should indicate one ohm or less.

4. A continuity check between each filament terminal and magnetron case should read open.

- 9 -

5-3 High Voltage Capacitor

1. Check continuity of the capacitor with the meter set at the highest resistance scale.

2. Once the capacitor is charged, a normal capacitor shows continuity for a short time, and then indicates 9M

Ω

.

3. A shorted capacitor will show continuous continuity.

4. An open capacitor will show constant 9M

Ω

.

5. Resistance between each terminal and chassis should read infinite.

5-4 High Voltage Diode

1. Isolate the diode from the circuit by disconnecting its leads.

2. With the ohm-meter set at the highest resistance scale, measure across the diode terminals. Reverse the meter leads and read the resistance. A meter with 6V, 9V or higher voltage batteries should be used to check the front-to back resistance of the diode (otherwise an infinite resistance may be read in both directions). The resistance of a normal diode will be infinite in one direction and several hundred K

Ω in the other direction.

5-5 Adjustment of Primary Switch, Door Sensing Switch and Monitor 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 interlock monitor switch (replace all together). Then follow the adjustment procedures below. After repair and adjustment, be sure to check the continuity of all interlock switches and the interlock monitor switch.

1. When mounting Primary switch and Interlock

Monitor switch to Latch Body, consult the figure.

2. No specific adjustment during installation of

Primary switch and Monitor switch to the latch body is necessary.

3. When mounting the Latch Body to the oven assembly, adjust the Latch Body by moving it so that the oven door will not have any play in it.

Check for play in the door by pulling the door assembly. Make sure that the latch keys move smoothly after adjustment is completed.

Completely tighten the screws holding the Latch

Body to the oven assembly.

Body Latch

4. Reconnect to Monitor switch and check the continuity of the monitor circuit and all latch switches again by following the components test procedures.

5. Confirm that the gap between the switch housing and the switch actuator is no more than

0.5mm when door is closed.

6. Interlock Switch Replacement - When replacing faulty switches, be sure switch mounting tabs are not bent, broken or otherwise deficient in their ability to secure the switches in place.

Primary switch

Monitor switch (COM-NC)

Monitor switch (COM-NO)

Door Sensing S/W

Primary Interlock Switch

Interlock

Monitor

Switch

Lever Door(B)

Door Sensing

Switch

Door Open Door Closed

∞

0

∞

∞

0

∞

0

0

- 10 -

5-6 Output Power of Magnetron

CAUTION

MICROWAVE RADIATION

PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE

GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY.

The output power of the magnetron can be measured by performing a water temperature rise test.

Equipment needed :

* Two 1-liter cylindrical borosilicate glass vessel (Outside diameter 190 mm)

* One glass thermometer with mercury column

NOTE: Check line voltage under load. Low voltage will lower the magnetron output. Make all temperature and time tests with accurate equipment.

1. Fill the one liter glass vessel with water.

2. Stir water in glass vessel with thermometer, and record glass vessel's temperature ("T1", 10±1°C).

3. After moving the water into another glass vessel, place it in the center of the cooking tray. Set the oven to high power and operate for 55seconds exactly. (3 seconds included as a holding time of magnetron oscillation:)

4. When heating is finished, stir the water again with the thermometer and measure the temperature ("T2").

5. Subtract T1 from T2. This will give you the water temperature rise. (

△

T)

6. The output power is obtained by the following formula;

Output Power = 4.187 x 1000 x

△

T+0.55xMcx(T

2

52

-T

0

) 55 : Heating Time (sec)

52 : Counting Time (sec)

4.187 : Coefficient for Water

1000 : Water (cc)

△

T : Temperature Rise (T2-T1)

To : Room Temperature

Mc : Cylindrical borosilicate glass weight

7. Normal temperature rise for this model is 9° C to 11° C at 'HIGH'.

NOTE 1: Variations or errors in the test procedure will cause a variance in the temperature rise.

Additional power test should be made if temperature rise is marginal.

NOTE 2: Output power in watts is computed by multiplying the temperature rise (step 5) by a factor of 91 times the of centigrade temperature.

5-7 Microwave Heat Distribution - Heat Evenness

The microwave heat distribution can be checked indirectly by measuring the water temperature rise at certain positions in the oven:

1. Prepare five beakers made of 'Pyrex', having 100 milliliters capacity each.

2. Measure exactly 100milliliters off water load with a measuring cylinder, and pour into each beaker.

3. Measure the temperature of each water load. (Readings shall be taken to the first place of decimals.)

4. Put each beaker in place on the cooking tray as illustrated in figure below. Start heating.

5. After heating for 2 minutes, measure the water temperature in each beaker.

6. Microwave heat distribution rate can be calculated as follows:

Heat Distribution =

Minimum

Temperature Rise

Maximum

Temperature Rise

X 100(%)

The result should exceed 65%.

- 11 -

5-8 Procedure for Measurement of Microwave Energy Leakage

1) 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.

2) Start to operate the oven and measure the leakage by using a microwave energy survey meter.

3) Set survey meter with dual ranges to 2,450MHz.

4) When measuring the leakage, always use the 2 inch spacer cone with the probe. Hold the probe perpendicular to the cabinet door. Place the spacer cone of the probe on the door and/or cabinet door seam and move along the seam, the door viewing window and the exhaust openings moving the probe in a clockwise direction at a rate of 1 inch/sec. If the leakage testing of the cabinet door seam is taken near a corner of the door, keep the probe perpendicular to the areas making sure that the probe end at the base of the cone does not get closer than 5cm to any metal. If it gets closer than 5cm, erroneous readings may result.

5) Measured leakage must be less than 4mW/cm 2 , after repair or adjustment.

Maximum allowable leakage is 5mW/cm 2 .

4mW/cm 2 is used to allow for measurement and meter accuracy

5-9 Check for Microwave Leakage

1. Remove the outer panel.

2. 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.

3. Start the oven at the highest power level.

4. Set survey meter dual ranges to 2,450MHz.

5. Using the survey meter and spacer cone as described above, measure near the opening of magnetron, the surface of the air guide and the surface of the wave guide as shown in the following photo.( but avoid the high voltage components.) The reading should be less than 4mW/cm 2 .

5-10 Note on Measurement

1) Do not exceed the limited scale.

2) The test probe must be held on the grip of the handle, otherwise a false reading may result when the operator's hand is between the handle and the probe.

3) When high leakage is suspected, do not move the probe horizontally along the oven surface; this may cause damage to the probe.

4) Follow the recommendation of the manufacturer of the microwave energy survey meter.

5-11 Leakage Measuring Procedure

5-11-1 Record keeping and notification after measurement

1) After adjustment and repair of a radiation preventing device, make a repair record for the measured values, and keep the data.

2) If the radiation leakage is more than 4 mW/cm 2 after determining that all parts are in good condition, functioning properly and the identical parts are replaced as listed in this manual notify that fact to ;

CENTRAL SERVICE CENTER

5-11-2 At least once a year have the microwave energy survey meter checked for accuracy by its manufacturer.

- 12 -

6. Troubleshooting

WARNING FOR HIGH VOLTAGE

4000 VOLTS EXIST AT THE HIGH VOLTAGE AREA. DO NOT OPERATE THE OVEN WITH

CABINET PARTS REMOVED. DO NOT REMOVE THE CABINET PARTS IF THE POWER SUPPLY

CORD IS PLUGGED IN THE WALL OUTLET. UNPLUG THE POWER CORD BEFORE SERVICING.

6-1 Electrical Malfunction

Parts Cause

Fuse blows out when door is opened.

Defective primary interlock switch ary winding.

Defective interlock monitor switch

Diagnosis Remedy

Check continuity of the primary switch terminals with wire removed using a multimeter. If there is continuity inter between switch terminals when door is opened,the switch is defective.

Replace the primary interlock switch

Check continuity of the monitor switch terminals with wire removed by using a multimeter.

If there is continuity between switch terminals the door is closed, the switch is defective.

Replace the interlock monitor switch

Fuse is

Open

Layer short of the secondary coil of

H. V. Transformer

The fuse will not blow right away, but if it blows in a few seconds, then there is a layer short If the fuse blows with H. V. Trans secondary open, the transformer may be faulty.

Replace H. V.Transformer

Oven lamp does not light.

1) Fuse blown out Check fuse.

2) Poor contact of power cord.

3) Defective lamp

4) Defective timer contacts

Check continuity of power supply cord. Also check whether the power cord is securely wired.

The fan motor rotates, but lamp does not light.

Check the terminals of timer for continuity,turning the timer knob ON and OFF repeatedly.

5) Thermal cutout

S/W open

In this case the oven lamp and fan do not turn on

1) Defective fan motor.

Fan does not operate.

2) Defective contacts of timer

If 230V is found at motor terminals, the motor should be replaced.

The oven lamp does not light and fan motor does not operate.

Replace the fuse.

Adjust or replace the power supply cord

Replace the lamp.

Replace the timer.

Replace the thermal cutout S/W

Replace the motor.

Replace the timer.

NOTE : Interlock monitor switch must be replaced when the fuse is blown out.

- 13 -

6-1 Electrical Malfunction(continued)

part Cause

1) Too small a load

Microwave turns off during cooking cycle.

2) Defective magnetron thermal cutout S/W properly shock is felt.

In complete grounding

1) Broken door hinges Door doe not operate properly 2) Missing or loose screw

Diagnosis

If a small amount of food is heated for a long time, period of microwave may turn off during operation.

Remedy

To increase the oven water into water into the oven.

Check to see if the magnetron thermal cutout switch is activated at a temperature higher than 150

℃

.

Replace thermal cutout switch.

Make sure that qrounding of the power supply cord has been done properly.

Remove the cabinet for inspection. Check the door hinge.

Check if the screws are secured well to the door hinge.

Rewire.

Replace door hinges.

Fasten or tighten.

Timer does not operate.

Cooking tray does not rotate.

Magnetron thermal cutout switch

OFF

1) Defective timer motor

2) Defective contacts of timer S/W

1) Defective drive motor

If the timer does not operate with 21V applied to the terminals, the timer motor amy be faulty.

The lamp does not light.

Check to see if 21V exists at the motor terminals.If

so, motor will be defective.

Replace timer.

Replace timer

Replace drive motor.

1) Blocking of the ventilatior

Check if the air inlet or outlet ventilation is blocked by the wall or other objects.

Keep a distance of

100mm from the wall or the objects.

2) Defective fan motor

If the fan motor does not operate with 230V applied to the terminal, the motor may be faulty.

3) Too small a load or no load

If a small amount of food is heated repeatedly over a long period of time, microwave turns off during operation.

Replace fan motor.

To increase the oven load, place a glass of water into the oven.

- 14 -

6-2 Unsatisfactory Cooking

Parts Cause

1) Open cathode of magnetron

2) Defective

H. V. Diode

3) Shorted magnetron

Diagnosis

Check the terminals with a multimeter to see if the heater circuit is open.

Check the H. V. Diode for continuity in the reverse and normal directions using megger. If there is continuity in the reverse direction, the H. V. Diode may be faulty.

(In this event H. V. Capacitor will be hot)

Connect megger leads to quick-connect terminal & body of the magnetron if there is continuity, the magnetron may be fuse will be blown) faulty. (In this case the main fuse will be blown)

If there is a crack in the magnetron antenna (dome), the magnetron is defective.

Remedy

Replace magnetron.

Replace H. V. Diode.

Replace magnetron.

Replace magnetron.

Food is not heated.

4) Defective magnetron

5) Poor contact of primary interlock switch

6) Open coil of

H. V. Transformer

7) Shorted H. V.

capacitor

8) Monitor fuse blown out

Check if the screws are secured well to the door hinge.

and pressing it ON and OFF repeatedly.

Check the continuity of primary coil and secondary coil. If there is no continuity, H. V. Transformer is defective.

Check the continuity of capacitor.

If the capacitor shorts, the fuse blows

Check the monitor fuse (on the noise filter)

Replace or adjust.

Replace the

H. V. Transformer.

Replace the

H. V. Capacitor.

Replace the

Monitor fuse

6-3 Part Check List

Symptom Related Parts

H.V.Transformer

Microwave cooking does not work.

H.V.Capacitor

H.V.Diode

Check Points Remedy

1) Check if the primary and secondary coil is open or shorted.

* Resistance of primary coil: . 2.5

Ω

Approx

Resistance of secondary coil: Approx. 151.5

Ω

2) Check if the MGT Heater Voltage is approx. 3.3V AC.

Caution : High voltage !

Check continuity of capacitor between two terminals with H.V.wire lead removed.

The resistance should be approx. 10M Ω , it's failure..

Replace.

Replace.

1) If there is no continuity in forward, direction the H.V.Diode is open.

2) If there is continuity in reverse direction, it's shorted.

Replace.

Fan motor does not rotate.

Fan motor Check if the motor coil is open.

Replace.

- 15 -

7. Exploded Views and Parts List

7-1 Exploded Views

W024

D002

D003

C025

C005

C082

C032

D049

D004

D006

D005

C007

C006

D011

D007

C024

M012

M001

M016

M062

D015

M031

M048

M030

M051

M049

M038

M132

M

M

17

M099

W002

M003

M015

M019 M014

M017

M020

M023

M022

B006

M157

M036

B001

B002

B018

M037

B009

M029

M035

M039

M040

T030

M043

M042

T001

T017

M034

- 16 -

7-2 Main Parts List

M023

M029

M030

M031

M034

M035

M036

M037

M038

M039

M040

M042

M043

M048

M003

M012

M014

M015

M016

M017

M019

M020

M022

No.

B001

B002

B006

B009

B018

M001

M049

M051

M062

M099

M132

M157

T001

T017

T030

W002

W024

Description

SWITCH-MICRO

SWITCH-MICRO

BODY-LATCH

LEVER-SWITCH

ASSY BODY LATCH

PANEL-OUTER

BRACKET-UPPER

BRACKET-HEATER

FUSE-CARTRIDGE

ASSY POWER CORD

COVER-BACK

ASSY NOISE FILTER

FUSE-CARTRIDGE

ASSY-MOTOR FAN

COVER-BLOWER

MOTOR FAN

THERMOSTAT

THERMOSTAT

THERMOSTAT

COUPLER

ASSY-MAGNETRON

LAMP-INCANDESCENT

COVER-AIR

TRANS H.V

C-OIL

BRACKET-HVC

DIODE-H.V

ASSY-H.V.FUSE

BASE-PLATE

MOTOR SYNCHRONOUS

COVER-MGT

HEATER-CERAMIC

LEVER-DOOR

FOOT

BLADE-FAN

TRAY-COOKING

ASSY-GUIDE ROLLER

RACK-WIRE

WIRE HARNESS-A

LEAD WIRE-G

DE31-10184A

DE47-20009A

DE47-00002B

DE47-20032A

DE67-00140A

OM75S(31)ERHN

4713-001046

DE71-60457B

DE26-00079A

2501-001011

DE61-00139A

DE59-00002A

DE91-70061J

DE80-00023A

Code No.

3405-001034

3405-001032

DE72-00138A

DE66-00088A

DE96-00115C

DE70-00184P

DE61-00263A

DE61-00265A

3601-001126

DE39-20058L

DE71-60298A

DE96-00008D

3601-001019

DE96-00031A

DE71-00148A

DE31-10154A

DE71-00151A

DE47-70030D

DE66-90113A

DE61-40066A

DE31-90057A

DE74-20102B

DE97-00193B

DE74-70071D

DE39-00334A

DE39-30097B

Specification

125/250VAC,16A,200GF,SPST-N

125/250VAC,16A,200GF,SPDT

NC2000(0.6/0.8/1.2),PP,-,-,-,

NC2000(0.6/0.8/1.2),PP,-,-,

CE2611N,NC2000(BUTTON)

MW850WA,C/STEEL,T0.5,-,-,-,P

N7Q88,SECC,T0.5,-,-,-,QUAR

N7Q88,ALSTAR,T0.5,W49.5,L

250V,1.6A,FAST-ACTING,CER

CE2713/XEF,1.5SQ,230V50H

-,SECC,T0.6,W273,L633,-,M6Q45

SN-3WEB(12),250V12A,EU

250V,12A,SLOW-BLOW,CERAMI

SMF-3RDEA,230V50HZ,2400RP

MW850WA,PP,T1.5,-,-,-,NTR,N

SMF-3RDEA,230V50Hz,2400rpm,3rd

PW2N-520PB,160/60,250V/7.5A,H

PW2N,-,-,100,110,-,-,-,187H,3

PW-2N,85/75,-,-,-,-,-,-

NC2000(0.6~0.8),PPS(ESS840),-,3G

OM75S(31)ERHN

240V,104mA,25W,ORG,-,-

3RD-0.7(BTM),PP,-,-,-,-,-,-

SHV-EURO1,230V,50HZ,2130V/3.6V

910nF,2100V,BK,54x35x75mm,20mm

NC2000,SECC,T0.8,-,-,-,0.6/0

ESJC13-12B,12KV,-,-,-,MWO ALL,

THV060T-0650-H,5KV0.65A,WL

MW850WA,SGCC1,T0.6,-,-,NC2000

M2HJ49ZR02,ST-16,50/60

MW850WA,PP,T2,W54,L129,-,GE-WH

115V,490W,26OHM,6,-,-,-,-

PP(TB53-GH41),T2.5,-,-,12g,NT

-,PP,-,BLK,-,-,-

PP,T1.5,-,3RD-W,-,-,-

GLASS,T5.0,M745,-,-

NC2000 0.6,T2*P1198(14

MSWR10,PI3,0.7/NC2000,D230,H85

G2712N,230V50HZ,EUROPE QU

L100,MBQ45,GRILL,-,-,-,-

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

2

Q'ty

1

1

1

1

1

1

1

1

2

1

2

1

1

1

1

1

1

Remark

PRI

MGT

CAVITY

GRILL

CV/AIR

- 17 -

7-3 Control & Door Parts List

D003

D004

D005

D006

D007

D011

D015

D049

No.

C005

C006

C007

C024

C025

C032

C082

D002

Code No.

DE72-00176D

DE61-70076A

DE67-00120A

DE45-00003A

DE64-00276A

3501-000309

DE94-00493D

DE64-00277B

DE63-00056B

DE92-50133C

DE01-00112A

DE64-40008B

DE61-00198A

DE64-00210A

DE94-00124B

DE94-00494B

S.N.A : SERVICE NOT AVAILABLE

Description

CONTROL-PANEL

SPRING-BUTTON

BUTTON-PUSH

TIMER

KNOB

RELAY-POWER

ASSY CONTROL-BOX

DOOR-A

SCREEN-DOOR

ASSY DOOR-E

FILM-DOOR

DOOR-C

SPRING-KEY

KEY-DOOR

ASSY DOOR-SUB

ASSY DOOR

Specification

G2711N/XET,ABS,-,-,-,-,PUR

-,HSWR,PI0.6,-,OD19,L23,5T

N8A77(CHINA),ABS,-,-,P/WHT,-

TMFK60M1A1,-,-,-,-,-,-,310 GRILL

N8A77,ABS,-,-,-,-,P/WHT(W9501),-,N8

240V,3750VA,15000MA,-,6MS,20

230V50HZ,G2711N/XET,PUR

M1711N/XET,ABS,PURE-WHT,SEI,TDS,-

M1711N/G2711N,SAN,SMOG,SILK(

MW4593G,-,BLK,3RD-0.7

-,PET,-,L268,T0.15,W150,NTR,-

-,PP,CE745G,-,-,-,BLK,-

M1877,HSWR,PI0.7,-,D6,23 1/4,

NC2000(0.6/0.8/1.2),PP,-,BLK,-,

MW4593G,BLK,3RD-0.7,-,-,-,

M1711N/XET,PURE-WHT,SEI,TDS+SA

1

1

1

1

1

1

1

1

1

1

2

1

Q'ty

1

1

1

1

Remark

S.N.A

S.N.A

- 18 -

7-4 Standard Parts List

Code No.

DE60-10012A

DE60-10012A

DE60-10012A

DE60-10012A

DE60-10063A

DE60-10080B

DE60-10080B

DE60-10082H

DE60-10082H

DE60-10082H

DE60-10082H

DE60-10082H

DE60-10082H

DE60-10098A

DE60-30016A

DE60-10069A

DE60-10069A

DE60-10012A

DE60-10098A

Description

SCREW-TAP TITE

SCREW-TAP TITE

SCREW-TAP TITE

SCREW-TAP TITE

SCREW-TAP TH

SCREW-WASHER

SCREW-WASHER

SCREW-A

SCREW-A

SCREW-A

SCREW-A

SCREW-A

SCREW-A

SCREW-ASSY TAP TITE

NUT-FLANGE

SCREW-TAP TH

SCREW-TAP TH

SCREW-TAP TITE

SCREW-ASSY TAP TITE

Specification

-,SWR10,M4,L10,TH,+,-,3,ZPC2,-

-,SWR10,M4,L10,TH,+,-,3,ZPC2,-

-,SWR10,M4,L10,TH,+,-,3,ZPC2,-

-,SWR10,M4,L10,TH,+,-,3,ZPC2,-

-,-,FEFN,-,TH,M4,-,L12,-,-

-,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,-

-,2S,SWRCH18A,ZP2,PH,PI5,-,L10,-,-

-,-,-,-,2S-4X12,TOOTHED,-,-,-,-

-,-,-,-,2S-4X12,TOOTHED,-,-,-,-

-,-,-,-,2S-4X12,TOOTHED,-,-,-,-

-,-,-,-,2S-4X12,TOOTHED,-,-,-,-

-,-,-,-,2S-4X12,TOOTHED,-,-,-,-

-,-,-,-,2S-4X12,TOOTHED,-,-,-,-

-,GLD,SWRCH18A,ZPC2,PH,TC,-,M4X8,WT,-

M4,MSWR10,-,-,-,-,-,-,-

-,-,FRFZY,-,TH,M4,-,L10,-,-

-,-,FRFZY,-,TH,M4,-,L10,-,-

-,SWR10,M4,L10,TH,+,-,3,ZPC2,-

-,GLD,SWRCH18A,ZPC2,PH,TC,-,M4X8,WT,-

Remark

N/P EARTH

P/C EARTH

PCB EARTH

TCO-S/W

O/PANEL

HVT

MGT

AIR/COVER

B/LATCH

B/PLATE

C/BLOWER

C/BOX

O/PANEL

D/MOTOR

F-MOTOR

RELAY

TIMER

B/COVER

HVD

1

2

1

4

1

1

1

2

3

1

1

4

1

4

4

1

1

Q'ty

1

1

- 19 -

8. Schematic Diagrams

8-1 Schematic Diagrams

BLU

BLU

MAGNETRON

FA F

HIGH VOLTAGE

DIODE

TO CHASSIS

HIGH VOLTAGE CAPACITOR

RED

RED

HIGH VOLTAGE

TRANSFORMER

- 20 -

RED

RED

H.V.FUSE

SYMBOL COLOR

BRN BROWN

BLK BLACK

RED RED

BLU BLUE

ELECTRONICS

© Samsung Electronics Co., Ltd. May 2003

Printed in Korea

Code No. : DE68-03136A