Samsung CE2813NR User manual

SERVICE
MICROWAVE OVEN CONTENTS
MICROWAVE OVEN
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
Manual
CE2813NR
SRSC/SALSC

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)properdoorclosing,
(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
beforetheovenisreleasedtothe
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 -
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/cm2.
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/cm2,
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.

- 2 -
H. V. Diode
Short
H. V. Capacitor
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.
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
Never touch any circuit wiring with your hand
nor with uninsulated tool during operation.
PRECAUTION
Servicemen should remove their watches
whenever working close to or replacing the
magnetron.
Fig. 1-1 Discharging High Voltage Capacitor
Touch chassis ground first then short to the high
voltage capacitor terminal by using screwdriver or
jumper wire.

- 3 -
2. Specifications
2-1 Table of Specifications
TIMER
POWER SOURCE
POWER CONSUMPTION
OUTPUT POWER
OPERATING FREQUENCY
MAGNETRON
COOLING METHOD
OUTSIDE DIMENSIONS
SHIPPING DIMENSIONS
OVEN DIMENSIONS
SHIPPING WEIGHT APPROX.
60 MINUTES
230V 50Hz, AC
MICROWAVE : 1,300W
GRILL : 1100W
FROM 100 TO 850W
(IEC-705 TEST PROCEDURE)
2,450MHz
OM75P(31)ESS
COOLING FAN MOTOR
489(W) x 275(H) x 379(D)
557(W) x 329(H) x 403(D)
306(W) x 211(H) x 320(D)
NET 14.5kg
GROSS 16.0kg

- 4 -
3. Operating Instructions
3-1 Control Panel
3-2 Features & External Views
275mm
206mm
379mm
489mm
342mm
DEFROST
INSTANT REHEAT
CE2813NR
100
300
450
600
700
850W
01
2
3
4
5
6
7
8
9
10
20
30
40
50
60
VENTILATION HOLES
GRILL
LIGHT VARIABLE COOKING
POWER CONTROL KNOB
TIMER KNOB
COUPLER
DOOR
DOOR LATCHES
OPEN DOOR
PUSH BUTTON
METAL RACK
SAFETY
INTERLOCK HOLES
ROLLER RINGTURNTABLE

- 5 -
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
whicharecontainedinoneassembly).
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
positionandmakesurethegasketisingoodcondition.
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.

- 6 -
4-3 Replacement of Door Assembly
4-3-1 Removal of Door Assembly
Remove hex bolts securing the upper hinge and
lower hinge. Then remove the door assembly.
4-3-2 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.
4-3-3 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.
4-3-4 Removal of Key Door & Spring
Remove pin hinge from Door "E"
Detach spring from Door "E" and key door.
Door "E"
Key Door Spring
Door "E"
SCREW
SCREWS
Upper Hinge
Lower Hinge

- 7 -
4-3-5 Reassembly Test
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 15A 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.Turntheovenupsidedowntoreplacethedrivemotor.
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.
Screw
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.
Drive Motor Cover Base Plate
Drive Motor

- 8 -
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.
SCREWS
CONTROL BOX

- 9 -
5. Alignment and Adjustments
5-1 High Voltage Transformer
1. Remove connectors from the transformer terminals
and check continuity.
2. Normal resistance readings are as follows:
(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.
Primary
Terminals
Filament Terminals
Secondary
Terminal
Magnetron Antenna Gasket Plate
Cooling Fins
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.
Secondary
Filament
Primary
Approx. 121
Approx. 0
Approx. 1.7

- 10 -
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.
3. A shorted capacitor will show continuous continuity.
4. An open capacitor will show constant 9M.
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in the
other direction.
5-5 Main Relay and Power Control Relay
1. The relays are located on the PCB Ass'y. Isolate them from the main circuit by disconnecting the leads.
2. Operate the microwave oven with a water load in the oven. Set the power level set to high.
3. Check continuity between terminals of the relays after the start pad is pressed.
5-6 Adjustment of Primary Switch, Door Sensing Switch and 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.
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
housingandtheswitchactuatorisnomorethan
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.
Door Open Door Closed
Primary switch
Monitor switch (COM-NC)
Monitor switch (COM-NO)
Door Sensing S/W
∞
0
∞
∞
0
∞
0
0
Primary Interlock Switch
Interlock
Monitor
Switch
Body Latch
Lever Door(B)
Door Sensing
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.

- 11 -
5-7 Output Power of Magnetron
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 52seconds 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(T2-T0) 52:HeatingTime(sec)
49 49 : 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.
5-8 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:
Minimum
Heat Distribution = Temperature Rise X 100(%)
Maximum
Temperature Rise
The result should exceed 65%.
CAUTION
MICROWAVE RADIATION
PERSONNEL SHOULD NOT ALLOW EXPOSURE TO MICROWAVE RADIATION FROM MICROWAVE
GENERATOR OR OTHER PARTS CONDUCTING MICROWAVE ENERGY.
D
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- 12 -
5-9 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/cm2, after repair or adjustment.
5-10 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.
5-11 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.
5-12 Leakage Measuring Procedure
5-12-1 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/cm2after 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
5-12-2 At least once a year have the microwave energy survey meter checked for accuracy by its
manufacturer.
Maximum allowable leakage is 5mW/cm2.
4mW/cm2is used to allow for measurement and meter accuracy

- 13 -
6. Troubleshooting
6-1 Electrical Malfunction
NOTE:Interlock monitor switch must be replaced when the fuse is blown out.
Parts Cause Diagnosis Remedy
Fuse blows
out when
door is
opened.
Defective primary
interlock switch
are winding.
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
Defective interlock
monitor 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. Replace the fuse.
2) Poor contact of
power cord.
Check continuity of power supply cord. Also
check whether the power cord is securely wired.
Adjust or replace
the power supply cord
3) Defective lamp The fan motor rotates, but lamp does not light. Replace the lamp.
4) Defective timer
contacts
Check the terminals of timer for continuity,turning
the timer knob ON and OFF repeatedly. Replace the timer.
5) Thermal cutout
S/W open In this case the oven lamp and fan do not turn on Replace the thermal cutout S/W
Fan does
not operate.
1) Defective fan
motor.
If 230V is found at motor terminals, the motor
should be replaced. Replace the motor.
2) Defective con-
tacts of timer
The oven lamp does not light and fan motor does
not operate. Replace the timer.
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.

- 14 -
6-1 Electrical Maltunction(continved)
part Cause Diagnosis Remedy
Microwave
turns off during
cooking cycle.
1) Too small
a load
If a small amount of food is heated for a long time,
period of microwave may turn off during operation.
To increase the oven
water intowater into
the oven.
2)Defective
magnetron
thermal
cutout S/W
Check to see if the magnetron thermal cutout switch
is activated at a temperature higher than 150.
Replace thermal cutout
switch.
properly
shock is
felt.
In complete
grounding
Make sure that grounding of the power supply cord
has been done properly. Rewire.
Door doe not
operate
properly
1) Broken door
hinges
Remove the cabinet for inspection. Check the door
hinge. Replace door hinges.
2) Missing or
loose screw
Check if the screws are secured well to the door
hinge. Fasten or tighten.
Timer does
not operate.
1) Defective
timer motor
If the timer does not operate with 230V applied to
the terminals, the timer motor amy be faulty. Replace timer.
2) Defective
contacts of
timer S/W
The lamp does not light. Replace timer
Cooking tray
does not
rotate.
1) Defective
drive motor
Check to see if 230V exists at the motor terminals.If
so, motor will be defective. Replace drive motor.
1) Blocking of
the ventilatior
Check if the air inlet or outlet ventilation is blocked
by the wall or other objects.
Keepadistanceof
100mm from thewall or
the objects.
Magnetron
thermal
cutout
switch
OFF
2) Defective fan
motor
If the fan motor does not operate with 230V applied
to the terminal, the motor may be faulty. Replace fan motor.
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.
To increase the oven
load, place a glass of
water into the oven.

- 15 -
6-2 Unsatisfactory Cooking
6-3 Part Check List
Parts Cause Diagnosis Remedy
Food is
not heated.
1) Open cathode of
magnetron
Check the terminals with a multimeter to see
if the heater circuit is open. Replace magnetron.
2) Defective
H. V. Diode
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)
Replace H. V. Diode.
3) Shorted
magnetron
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)
Replace magnetron.
4) Defective
magnetron
If there is a crack in the magnetron antenna (dome),
the magnetron is defective. Replace magnetron.
5) Poor contact of
primary interlock
switch
Check if the screws are secured well to the door hinge.
and pressing it ON and OFF repeatedly. Replace or adjust.
6) Open coil of
H. V. Trans-
former
Check the continuity of primary coil and secondary
coil. If there is no continuity, H. V. Transformer is
defective.
Replace the
H. V. Transformer.
7) Shorted H. V.
capacitor
Check the continuity of capacitor.
If the capacitor shorts, the fuse blows
Replace the
H. V. Capacitor.
8) Monitor fuse
blown out Check the monitor fuse (on the noise filter) Replace the Monitor fuse
Symptom Related Parts Check Points Remedy
Microwave
cooking does
not work.
H.V.Transformer
1) Check if the primary and secondary coil is open or shorted.
* Resistance of primary coil: . 1.7Approx
Resistance of secondary coil: Approx. 121
2) Check if the MGT Heater Voltage is approx. 3.3V AC.
Caution : High voltage !
Replace.
H.V.Capacitor
Check continuity of capacitor between two
terminals with H.V.wire lead removed.
The resistance should be approx. 10MΩ,it'sfailure..
Replace.
H.V.Diode 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.

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7. Exploded Views and Parts List
7-1 Exploded Views
MM13
MC13
MM01
MM63
MM62
MM172
MM22
MM16
MC01
MC05
MC04
MC09
MC03
MC12
MC08 MM29 MM30
MM31
MM06
MM171
MM05
MM551MM55
MM26
MM61
MM68
MM57
MM60
MM17
MM08
MM09
MM07
MM25
MM59
MM21
MM18
MM19
MM20
MM64
MM03
MM32
MM10
MD01
MM109
MM88
MD10
MD02 MD03
MD04 MD05
MD24
MD06
MD07
MD09
MD08
MM14
MM27
MM28
MB01
MB05
MB03
MB04
MB02
MM67

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7-2 Main Parts List
No. Code No. Description Specification Q'ty Remark
MB01 DE96-00115C ASSY BODY LATCH CE2611N,NC2000(BUTTON) 1
MB02 3405-000175 SWITCH-MICRO 250V,15A,200gf,SPST-NO 1
MB03 3405-000178 SWITCH-MICRO 250V,15A,200gf,SPST-NO 2PRI,SEC
MB04 DE66-00088A LEVER-SWITCH NC2000(0.6/0.8/1.2),PP,NTR,BUTTON-TYPE 1
MB05 DE72-00138A BODY-LATCH NC2000(0.6/0.8/1.2),PP,-,-,-,-,WHT,- 1
MM01 DE70-00184P PANEL-OUTER MW850WA,C/STEEL,T0.5,P/WHT,NC2-0.8CU.FT 1
MM03 DE39-00037B WIRE HARNESS-A CE2713N,230V50HZ,-,-,-,-,NC2000 1
MM05 DE96-00008C ASSY NOISE FILTER SN-3WEH,250V15A,3W INRUSH D,-,-,-,- 1
MM06 DE96-00031A ASSY-MOTOR FAN SMF-3RDEA,230V50HZ,2400RPM,M1733,-,-,- 1
MM07 DE39-20058L ASSY POWER CORD -,230V50HZ,-,GRY,CE2713/XEF,1.5SQ 1
MM08 OM75P(31)ESS ASSY-MAGNETRON OM75P 1
MM09 DE71-60457B COVER-AIR 3RD-0.7(BTM),PP,-,-,-,-,-,- 1
MM10 4713-001031 LAMP-INCANDESCENT 230V,173mA,40W,ORG,-,-,25x69mm 1CV/AIR
MM109 DE74-80062A STOPPER-HEATER 3RD-W,SECC,TO.8xW70xL70 1
MM13 DE66-90113A LEVER-DOOR PP(TB53-GH41),T2.5,-,-,- 1
MM14 DE26-00014B TRANS-H.V SHV-175ECR,230V,50HZ,2290V/3.45V,-,-,H,- 1
MM16 DE71-00159A COVER-CEILING CN2835,MICA SHEET,T0.3,W114,L56,NC0.8cu.ft 1
MM17 DE47-20009A THERMOSTAT PW2N-520PB,160/60,250V/7.5A,H, 1MG-TCO
MM171 DE47-00002B THERMOSTAT PW2N,-,-,100,110,-,-,-,187H,30.0 1
MM172 DE47-20010A THERMOSTAT PW-2N(120/60)187Y,250V7.5A,120 1CAV-TCO
MM18 DE74-20102B TRAY-COOKING GLASS,T5.0,M745,-,- 1
MM19 DE97-00193B ASSY-GUIDE ROLLER NC2000 0.6,T2*P1198(14PI),-,- 1
MM20 DE67-00140A COUPLER NC2000(0.6~0.8),PPS(ESS840),-,3G,BRN,NEW 1
MM21 DE39-10109A WIRE HARNESS-E 230V50HZ,M9G45,CTW,-,- 1
MM22 DE31-10154A MOTOR-SYNCHRONOUS M2HJ49ZR02,ST-16,50/60HZ,- 1
MM25 DE65-20014A CABLE CLAMP -,-,-,NY-66,-,DA-6N 1P-CORD
MM26 DE71-00148A COVER-BLOWER MW850WA,PP,T1.5,NTR,NC2000(0.8CUFT) 1
MM27 DE61-40066A FOOT -,PP,-,BLK,-,-,- 2
MM28 DE80-00023B BASE-PLATE CE2877N,-,T0.6,-,-,NC2000,0.8CUFT 1
MM29 2501-001016 C-OIL 950nF,2.1KV,BK,35x54x80,20mm 1
MM30 DE61-00139A BRACKET-HVC NC2000,SECC,T0.8,-,-,-,0.6/0.8/1.2CUFT 1
MM31 DE59-00002A DIODE-H.V ESJC13-12B,12KV,-,-,-,MWO ALL,- 1
MM32 DE91-70061B ASSY-H.V.FUSE THV060T-0750-H,5KV/0.75A,RED 1
MM55 3601-001126 FUSE-CARTRIDGE 250V,1.6A,FAST-ACTING,CERAMIC,5x20mm 1
MM551 3601-001197 FUSE-CARTRIDGE 250V,15A,SLOW-BLOW,CERAMIC,6.35x31.3mm 1
MM57 DE61-50576A BRACKET-HEATER -,STS430,T0.5,W70,L70,-,- 1
MM59 DE71-60451A COVER-BACK 3RD-0.7,SECC,T0.5,W115,L332,-,-,- 1
MM60 DE63-20017A GASKET-HEATER BRASS,T1.5,OD30.5,ID22.5,-,-,- 1
MM61 DE47-00004A HEATER-GRILL SHG-2733E,-,-,-,-,-,-,-,230V1080W 1
MM62 DE61-70060A SPRING-PLATE SK-5,T0.5,-,-,-,-,- 1
MM63 DE61-30008A SUPPORTER-HEATER ALUMINA,T12,CE745G,-,-,-,- 1
MM64 DE74-70071D RACK-WIRE MSWR10,PI3,0.7/NC2000,D230,H85,-,- 1
MM67 DE61-00143A BRACKET-UPPER MW850WA,SECC,T0.5,-,-,-,NC2000(0.8CUFT) 1
MM68 6031-001424 WASHER-PLAIN PTFE,-,ID22.2,OD28,T1.7,WHT 1
MM88 DE73-90027B FERRITE RU65(RU15*28.6*6.5),-,M2L(FE2O3+Ni+Zn) ,-,-,- 1

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7-3 Control & Door Parts List
No. Code No. Description Specification Q'ty Remark
MC01 -ASSY CONTROL-BOX 230V49HZ,CE2813NR/BWT,PURE-WHT 1S.N.A
MC03 DE72-00147P CONTROL-PANEL CE2813NR/BWT,,ABS,-,-,-,PURE-WHT 1
MC04 DE61-70076A SPRING-BUTTON HSWR,PI0.6,-,-,-,-,- 1
MC05 DE66-20281A BUTTON-PUSH 3RD-W B DESIGN,-,T2x37x86,-,-,15g 1
MC08 DE45-00003A TIMER TMFK60M1A1,-,-,-,-,-,-,310 GRILL 1
MC09 DE64-00268A KNOB M1713,ABS,-,-,-,-,WHT,-,- 2
MC12 3501-000309 RELAY-POWER 240V,3750VA,15A,-,6mS,20mS 1
MC13 -ASSY CONTROL-PANEL 230V49HZ,CE2813NR/BWT,PURE-WHT 1
MD01 DE94-00289V ASSY DOOR CE2813NR,CE2833NR/BWT,P/WHT,CIS 1
MD02 DE64-40322Y DOOR-A ABS,-,-,P-WHT,M1733R/BWT,TDS+S/S 1
MD03 DE67-20186A SCREEN-DOOR SAN,T2.2,W354,L224,SMOG,3RD-0.7CU.FT,- 1
MD04 DE92-50133F ASSY DOOR-E CE2733(3RD-0.7),BLK-CAOTING,-,2ND-HINGE,-,-,- 1
MD05 DE01-00112B FILM-DOOR 1
MD06 DE64-40008B DOOR-C PP,T1.5,BLK,CE745G,-,-,- 1
MD07 DE61-00198A SPRING-KEY M1877,HSWR,D6,-,-,23 1/4,-,T0.7,-,-,NC2000(0.7) 1
MD08 DE61-00145A HINGE-UPPER NC2000(GRILL),SCP,T2.0,-,-,ZPC3,-,- 1
MD09 DE61-00146A HINGE-LOWER NC2000,SCP,T2.0,-,-,ZPC3,GRILL,- 1
MD10 DE64-40006F DOOR-KEY POM(F20-02),-,-,12G,BLK,MW7897G,NO-TALK 1
MD24 DE94-00204Z ASSY DOOR-A M1713R/BWT,WHT,3RD-S2,-,-,-,- 1
S.N.A : SERVICE NOT ASSEMBLY