Samsung Microwave Oven Ce745Gr Users Manual

CE745GR to the manual 57d63d77-9240-4274-8187-a570124c0e0d

2015-01-23

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MICROWAVE OVEN
CE745GR

SERVICE

Manual
CONTENTS

MICROWAVE OVEN
1. Precaution

2. Specifications

3. Operating Instructions

4. Disassembly and Reassembly

5. Alignment and Adjustments
Auto

l b s.
kg

Auto

oz.
g

1-2-3
h
10min

min
1min

10s.

6. Troubleshooting

1min+

GRILL

CE745GR

7. Exploded Views and Parts List

8. PCB Diagrams

9. Schematic Diagrams

BWT

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.
Samsung Electronics

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. Pacemaker wearers must consult a physician
before attempting to service an MWO.
8. Notify the Central Service Center if the
microwave leakage exceeds 5 mw/cm2
4. Check all grounds.
5. 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.
6. When reinstalling the chassis and its
assemblies, be sure to restore all protective
devices, including: nonmetallic control
knobs and compartment covers.
7. 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.
8. In the event of suspected microwave energy
leakage in excess of 5mW/§†, please notify
J.V.SAMSUNG SERVICE LTD.
MARSHAL ZHUKOU.,1.OFFICE 201
123308,MOSCOW,RUSSIA

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

Samsung Electronics

11. If the fuse is blown by the Interlock Monitor
Switch: Replace all of the following at the
same time: Primary and secondary switches,
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.
12. 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.10.Always unplug
the unit's AC power cord from the AC
power source before attempting to
remove or reinstall any component or
assembly.
13. 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.
14. 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.
15. 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

Pretaution

1-2 Special Servicing Precautions (Continued)
16. 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.
17. Components that are critical for safety are
indicated in the circuit diagram by
shading,
or
.
18. 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 measureany 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 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.
Fig. 1-1. Discharging the High Voltage Capacitor

1-2

Samsung Electronics

2. Specifications
2-1 Table of Specifications
MODEL

ITEM

CE745GR

TIMER

99 MINUTES 90 SECONDS

POWER SOURCE

230V/50HZ, AC

POWER CONSUMPTION

MICROWAVE : 1,400W,GRILL : 1100W

OUTPUT POWER

FROM85 TO 850W (10 LEVEL POWER)
(IEC-705 TEST PROCEDURE)

OPERATING FREQUENCY

2,450MHz

MAGNETRON

OM75PH(31)

COOLING METHOD

COOLING FAN MOTOR

OUTSIDE DIMENSIONS

191/4"(W) x 1027/32"(H) x 143/8"(D)

NET WEIGHT

36.3 LBS.

SHIPPING WEIGHT

39.6 LBS.

2-2 Comparison Chart
MODEL
FEATURE
MORE/LESS
AUTO REHEAT
AUTO DEFROST
TIME COOK
POWER LEVEL
INSTANT COOK
MEMORY
BOOST
CHILD LOCK
CLOCK
GRILL
COMBI

Samsung Electronics

CE745GR
O
O
O
O
O
O
O
O
O
O
O

2-1

3. Operating Instructions
3-1 Control Panel

Instant Cook Button
Auto Defrost Butten

Auto

Auto Cook Button

Auto

Kg,g Button

More/Less Button
oz.
g

lbs.
kg

Clock Setting Button

Power Level Selection Button

Grill Button

Hold/Timer Button

Combi Button
1-2-3
h
10min

Memory Button

min
1min

10s.

Timer Setting Button
Stop Button

Start/Boost Button

1min+

CE745GR

3-2 Features & External Views
Ventilation Slot

Door

Door Latches

Light

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,,,,,,,,,,,,,,,,,

Safety Interlock Holes

Auto

lbs.
kg

Auto

Control Panel

oz.
g

1-2-3
h
10min

min
1min

10s.

1min+

CE745GR

Open Door Push Button
Glass Plate
Guide Roller

Auto

l b s.
kg

275mm

GRILL WIRE RACK

Auto

oz.
g

1-2-3

h
10min

min
1min

10s.

1min+

GRILL

CE745GR

200mm
357mm
489mm

Samsung Electronics

365mm

3-1

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 500pF
capacitors (all of which are contained in one
assembly).

Cover Air
Lamp

Thermo S/W

1. Disconnect all lead wires from the magnetron
Fan Motor
and lamp.
BKT-Mountain
2. Remove the bracket mounting.
3. Remove the air cover.
4. Remove screws securing the magnetron to the
wave guide.
5. Take out the magnetron very carefully.
6. Remove screws from the back panel.
7.Remove the assy noise filter.
8. Take out the fan motor.
9. Remove the oven lamp by pulling out from hole
of air cover carefully.
Screw
H. V. Trans
Magnetron
10. NOTE1: When removing the magnetron, make
H. V. Capacitor
sure that its antenna does not hit any
adjacent parts, or it may be damaged.
11. 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 remov 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.

Samsung Electronics

Bolts

H. V. Trans

4-1

Disassembly and Reassembly

4-3 Replacement of Door Assembly
4-3-1 Removal of Door Assembly
Remove screws securing the upper hinge and
lower hinge. Then remove the door assembly.

Upper Hinge
Screw

Lower Hinge
Screw

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.

Door "C"

Door "A"

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.

Door "E"

1. Insertion depth of the thin metal plate should be
0.5mm or less.

4-2

Samsung Electronics

Disassembly and Reassembly

4-3-4 Removal of Key Door & Spring
1. Remove pin hinge from Door "E"
Detach spring from Door "E" and key door.

Door "E"

2. 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.
3. 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.

Key Door

Spring

4. 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.
5. Do the microwave leakage test.

4-4 Replacement of Fuse
1. Disconnect the oven from the power source.
2. Remove the 10A fuse in the Noise filter.
3. When replacing the 10A fuse, be sure to use an
exact replacement part. If new 10A fuse blows
out again after replacement, check the primary
interlock switch, door sensing switch and
interlock monitor switch.
4. 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.

Drive Motor
Screw

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.
Thermo
Switch

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.

Drive Motor Cover

Base Plate

9. Screw the deive motor cover to the base plate
with a screw driver.
10. Remount the coupler in the correct position.
Samsung Electronics

4-3

Disassembly and Reassembly

4-6 Replacement of Control Circuit Board
4-6-1 Removal of Control Box Assembly
1. Be sure to ground any static electric charge in
your body and never touch the control circuit.

2. Disconnect the connectors from the control
circuit board.

Screw

3. Remove screws securing the control box
assembly.
4. Remove the screw securing the ground tail of
the keyboard.

Control Box

4-6-2 Removal of P.C.B Assembly
1. Pull the lever end of the plastic fastener and
remove the Flexible Printed Circuit(FPC) of
membrane panel.
2. Remove screws securing the control circuit
board.

FPC Connector

Screw

3. Lift up the control circuit board from the Ass'y
control box.
4. When reconnecting the FPC connector, make
sure that the holes on the connector are properly
engaged with the hooks on the Plastic Fastener.

4-6-3 Removal of Window Display & Membrane Panel
1. Window display should not be disassembled as
its mounting tabs will be broken. If repair work
is difficult, replace with Ass'y control panel.
2. The membrane key board is attached to the
escutcheon base with doublefaced adhesive
tape. Therefore, applying hot air such as using
of hair dryer is recommended for smoother
removal.
3. When installing new membrane key board,
make sure that the surface of escutcheon base is
cleaned sufficiently so that any problems
(shorted contacts or uneven surface) can be
avoided.

4-4

Window
Display

Membrane
Panel

Samsung Electronics

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:
MODEL
Secondary
Filament
Primary

Filament Terminals

CE745GR
103.2Ω ¡ 10%
Shows Continuity
1.61Ω ¡ 10%

(Room temperature = 20ûC)

Primary
Terminals

5-2 Low Voltage Transformer
1. The low voltage transformer is located on the
control circuit board.
2. Remove the low voltage transformer from the
PCB Ass'y and check continuity.
3. Normal resistor reading is shown in the table.

Terminals
1~2(Input)
4~5(Output17V)
7~8(Output2.9V)

Resistance
1149Ω
12.26Ω
2.574Ω

5-3 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.

Magnetron Antenna
Gasket Plate

Cooling Fins

Samsung Electronics

5-1

Alignment and Adjustments

5-4 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 9MΩ.
3. A shorted capacitor will show continuous continuity.
4. An open capacitor will show constant 9MΩ.
5. Resistance between each terminal and chassis should read infinite.

5-5 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 KΩ in
the other direction.

5-6 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.

5-7 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 door sensing 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.
Primary Interlock Switch

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
housing and the switch actuator is no more than
0.5mm when door is closed.
5-2

Interlock Monitor
Switch

Lever Door
Body Latch

Primary switch
Monitor switch (COM-NC)
Door Sensing S/W

Door Sensing
Switch
Door Open

Door Closed

∞
0
∞

0
∞
0

Samsung Electronics

Alignment and Adjustments

5-8 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±1ûC).
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 51seconds exactly. (2 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+0.88xMcx(T2-T0)
49.25

49.25: Heating Time (sec)
4.187 : Coefficient for Water
1000 : Water (cc)
∆T : Temperature Rise (T2-T1)
Mc : Cylindrical borosilicate glass weight
To : Room temperature.

7. Normal temperature rise for this model is 9ûC to 11ûC 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 85
times the of centigrade temperature.

5 9 Leakage Measuring Procedure
5-9-1 Record keeping and notification after measurement
1) After adjustment and repair of a radiarion
preventing device, make a repair record for the
measured values, and keep the data.
2) If the radiation leakage is more than 5 mW/§† after
determining that all parts are in good condition,
functioning properly and the identical parts are
replaced as listed in this manual notift that fact to ;
J.V.SAMSUNG SERVICE LTD.
MARSHAL ZHUKOU.,1.OFFICE 201
123308,MOSCOW,RUSSIA

5-9-2 At least once a year have the microwave energy
survey meter checked for accuracy by its
manufacturer.

Samsung Electronics

5-3

Alignment and Adjustments

5-10 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

D

X 100(%)

Beaker

D

The result should exceed 65%.

D/4
D/4

D/4
D/4

5-4

Cooking Tray

Samsung Electronics

6. Troubleshooting
PRECAUTION
1. CHECK GROUNDING BEFORE CHECKING FOR TROUBLE.
2. BE CAREFUL OF THE HIGH VOLTAGE CIRCUIT.
3. DISCHARGE THE HIGH VOLTAGE CAPACITOR.
4. WHEN CHECKING THE CONTINUITY OF THE SWITCHES OR TRANSFORMER, DISCONNECT ONE LEAD WIRE FROM THESE
PARTS AND THEN CHECK CONTINUITY WITHOUT THE POWER SOURCE ON. TO DO OTHERWISE MAY RESULT IN A FALSE
READING OR DAMAGE TO YOUR METER.
5. DO NOT TOUCH ANY PART OF THE CIRCUIT OR THE CONTROL CIRCUIT BOARD, SINCE STATIC DISCHARGE MAY DAMAGE IT.
ALWAYS TOUCH GROUND WHILE WORKING ON IT TO DISCHARGE ANY STATIC CHARGE BUILT UP.

6-1 Electrical Malfunction
SYMPTOM

CAUSE

CORRECTIONS

Oven is dead.
Fuse is OK.
No display and no operation at all.

1. Open or loose lead wire harness
2. Open thermal cutout (Magnetron)
3. Open low voltage transformer
4. Defective Ass'y PCB

Check fan motor when thermal cutout is defective.

No display and no operation at all.
Fuse is blown.

1. Shorted lead wire harness
2. Defective primary latch switch (NOTE 1)
3. Defective monitor switch (NOTE1)
4. Shorted HVCapacitor
5. Shorted HVTransformer (NOTE2)

Check adjustment of primary, interlock monitor,
door sensing switch.

Check Ass'y PCB when LVT is defective.

NOTE 1: All of these switches must be replaced at the same time.
(refer to adjustment instructions)
Check continuity of power relay contacts and if it has continuity, replace power
relay also.
NOTE 2: When HVTransformer is replaced, check diode and magnetron also.
Oven does not accept
key input (Program)

Timer starts countdown but no
microwave oscillation.
(No heat while oven lamp and
fan motor turn on.)

Samsung Electronics

1. Key input is not in-Sequence
2. Open or loose connection of membrane
key pad to Ass'y PCB
3. Shorted or open membrane panel
4. Defective Ass'y PCB

Refer to operation procedure.

1. Off-alignment of latch switches
2. Open or loose connection of high voltage
circuit especially magnetron filament
circuit
NOTE: Large contact resistance will bring
lower magnetron filament voltage and
cause magnetron to lower output and/or
intermittent oscillation.
3. Defective high voltage components
H.V.Transformer
H.V.Capacitor
H.V.Diode,H.V.Fuse
Magnetron
4. Open or loose wiring of power relay
5. Defective primary latch switch
6. Defective power relay or Ass'y PCB

Adjust door and latch switches.

Replace PCB main.

Check high voltage component according to
component test procedure and replace if it is
defective.

Replace PCB main.

6-1

Troubleshooting

6-1 Electrical Malfunction(continued)
SYMPTOM

CAUSE

CORRECTIONS

Oven lamp and fan motor turn on

1. Misadjustment or loose wiring
of primary latch switch
2. Defective primary latch switch

Adjust door and latch switches.

Oven can program but timer
does not start.

1. Open or loose wiring of secondary
interlock switch
2. Off-alignment of primary interlock
3. Defective secondary interlock S/W

Adjust door and interlock switches.

Microwave output is low;.
Oven takes longer time to
cook food.

1. Decrease in power source voltage.
2. Open or loose wiring of magnetron
filament circuit. (Intermittent oscillation))
3. Aging of magnetron

Consult electrician.

Fan motor turns on when plugged in

Loose wiring of door sensing switch

Check wire of door sensing switch.

Oven does not operate and return
to the plugged in mode.

Defective Ass'y PCB

Replace PCB main.

Loud buzzing noise can be heard.

1. Loose fan and fan motor
2. Loose screws on H.V.Transformer
3. Shorted H.V.Diode

Tighten screws of fan motor.
Tighten screws of H.V.Transformer.
Replace H.V.Diode.

Turntable motor does not rotate.

1. Open or loose wiring of turntable motor.
2. Defective turntable motor.

Check the wire of turntable motor
Replace turntable motor.

Oven stops operation during cooking

1. Open or loose wiring of primary
interlock switch
2. Operation of thermal cutout(Magnetron)

Adjust door and latch switches.

Sparks

1. Metallic ware or cooking dishes
touching on the oven wall.
2. Ceramic ware trimmed with gold or
silver powder also causes sparks.

Inform the customer.
Do not use any type of cookware with
metallic trimming.

Uneven cooking

Uneven intensity of microwave due to
its characteristics.

Wrap thinner parts of the food with
aluminum foil.
Use plastic wrap or cover with a lid.
Stir once or twice while cooking
foods such as soup, cocoa, or milk.

Noise from the turntable motor
when it starts to operate.

Noise may result from the motor.

Replace turntable motor.

6-2

Samsung Electronics

7. Exploded Views and Parts List
7-1 Exploded Views

D5

M1
M3

D1

M2

D7

M13

D4
M12

M6

M4

D6
M35

D2

M7
M9

M5

D3

M10
M8

M11

M36

M34

M14

M37

M16
M15
M33

M17

M20

M21
M32

M31

M22

M18

B2

M19

B1

M30

B3
M27

M38
M29

B5
B4
M24

C4

M23

M26

C3

C5
C6
M25
M43

M28
C1

M39
C2
M40

M42

M44

M41

Samsung Electronics

7-1

Exploded Views and Parts List

7-2 Main Parts List
Ref. No.

Parts No.

Description/Specification

M 1
M 2
M 3
M 4
M 5
M 6
M 7
M 8
M 9
M 10
M 11
M 12
M 13
M 14
M 15
M 16
M 17
M 18
M 19
M 20
M 21
M 22
M 23
M 24
M 25
M 26
M 27
M 28
M 29
M 30
M 31
M 32
M 33
M 34
M 35
M 36
M 37
M 38
M 39
M 40
M 41
M 42
M 43
M 44

DE70-30032X
DE63-90150A
DE61-50323A
DE61-30008A
DE61-70060A
DE47-70072A
DE60-40009B
DE63-20017A
DE61-50021A
DE61-50027A
DE61-50025A
DE39-20058C
DE71-60298A
DE91-40095A
DE31-30031A
DE47-20009A
DE03-30035A
4713-001004
DE71-60010A
DE61-50129A
DE93-20001A
DE66-90013A
DE91-70061B
DE61-50106A
DE91-70065A
2501-001014
DE26-10099A
DE61-40017A
DE80-10003A
DE31-10154A
DE47-20008A
DE71-60013A
DE61-80004A
DE61-80005A
DE47-20174A
DE65-20014A

PANEL-OUTER;T0.6 W351.2 L1010 WHT-COATIN
CUSHION-RUBBER;DFA20 T2 W100 L140 BLK
BRACKET-UPPER;ALSTAR T0.6 W385 L205 M624
SUPPORTER-HEATER;ALUMINA T12 CE745G
SPRING-PLATE;SK-5 T0.5
HEATER-GRILL;230V 1100W 47.OHM 6.25
WASHER-TEFLON;SLOT ID22.2 OD28 T1.2 TEFL
GASKET-HEATER;BRASS T1.5 OD30.5 ID22.5
BRACKET-FLANGE;SECC1 T0.8 32 32
BRACKET-HEATER;BSS2-A T(1.0) W(51) L(55)
BRACKET-EARTH;BSS2-A T1.0 CE745G
ASSY POWER CORD;KKP-4819D/B232 250V16A L
COVER-BACK;SECC T0.6 W273 L633 M6Q45
ASSY NOISE FILTER;SN-E10D(N) 250V 10A “2
FAN-MOTOR;SMF745EA 230V/50HZ ASSY-FAN-MO
THERMOSTAT;CS-7SA(160/60)187Y 250V7.5A 1
MAGNETRON;OM75PH((31)ESS
LAMP-INCANDESCENT;230V,-,40W,ORG,-,-,25x
COVER-AIR;PP(TB53) T1.7 WHT 64G M745
BRACKET-MOUNTING;SECC T0.8 W24 L316 M624
ASSY BODY LATCH;2ND-W1 M97G45/M9745
LEVER-DOOR;POM(F20-01) NTR MW5630T
ASSY-H.V.FUSE;THV060T-0750-H 5KV0.75A RE
BRACKET-HVC;SECC T0.8 W31 L125.8
ASSY-HVD;BMP28 SEMA 12KV SUMI
C-OIL;HCH212105C 1.05UF,2100V 35X54X85,2
TRANS-H.V;SHV-745EG1 230V 50HZ 2200V DPC
FOOT;PP(A353) BLK MW5630T
BASE-PLATE;SGCC1-Z T0.8 W340 L550 M745
MOTOR-DRIVE;M2HJ49ZR02,ST-16 21V 5/6
THERMOSTAT;CS-7S(100/60)187Y 250V7.5A 10
COVER-CEILING;MICA T0.5 W52 L118 CE745G
HINGE-LOWER;SCP1 T2.3 ZN-COATING BLK
HINGE-UPPER;SCP1 T2.3 BLK ZN-COATING
THERMOSTAT;NT-101NA 8XH 120 110 23.8MM
CABLE CLAMP;DA-6N NY-66
ASSY DOOR;PUSH WHT CE745GR
ASSY CONTROL-BOX;230V-50HZ CE745GR(CIS)
TRAY-COOKING;GLASS T5.0 PI288 780G M745
ASSY-GUIDE ROLLER;MW4370W
COUPLER;PPS 5GR BRN M97G45
RACK-WIRE;MSWR3 PI3 PI230 HI80 SNC2
ASSY WIRE HARNESS-E;230V50HZ M9G45 CTW
ASSY WIRE HARNESS-A;230V50HZ CE745G/CE94

DE74-20102B
DE92-90436A
DE67-60002A
DE74-70071A
DE39-40409A
DE39-40568A

: Option Parts

7-2

: Warning

Q'ty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Remarks

OLD PARTS NO.

73011-0243-00
76674-232-810
70534-0004-02
73404-0014-00

73312-0184-001

77059-0034-00

73013-0342-00
71533-0015-00
79163-0252-01
73013-0194-00
79169-0153-00

73004-0007-00

76449-0003-00

79204-0381-00

:Electrostatically Sensitive Devices

Samsung Electronics

Exploded Views and Parts List

7-3 Door Parts List
Ref. No.

Parts No.

Description/Specification

Q'ty

D 1

DE64-40007A

DOOR-A;ABS(VH-080) T3.0 WHT

1

D 2

DE64-40006A

DOOR-KEY;POM(TC3005) T2.0 12GR BLK CE9

1

D 3

DE61-70033A

SPRING-KEY;ES HSWR10 PI0.6 D6.0 L22.3 BL

1

D 4

DE67-20004D

SCREEN-DOOR;PC T1.5 W173.6 L373.5 WHT CE

1

D 5

DE92-50126B

ASSY DOOR-E;COATING BLK CE745G

1

D 6

DE64-40008B

DOOR-C;PP T1.5 W L G BLK CE745G

1

D 7

DE01-00003B

FILM-DOOR;PC T0.2 W143 L265 TRP CE745G

1

Remarks

Old Parts No.

72724-0040-00

7-4 Control Parts List
Ref. No.

Parts No.

Description/Specification

Q'ty

C 1

DE66-20006A

BUTTON-PUSH;RESIN-ABS(HR-0370U) P/WHT M9

1

C 2

DE61-70076A

SPRING-BUTTON;HSWR PI0.6

1

C 3

DE34-10007C

SWITCH-MEMBRANE;PET 230V50HZ W89.7 L161.

1

C 4

DE72-70003A

CONTROL-PANEL;ABS(VH-080) WHT

1

C 5

DE67-40002A

WINDOW-DISPLAY;RESIN-ACRYLIC T2.3 M945(I

1

C 6

DE91-10377A

ASSY P.C.B-MAIN;230V50HZ NS V.F.D CE945G

1

Remarks

Old Parts No.

76674-239-310

7-5 Body Latch Parts List
Ref. No.

Parts No.

Description/Specification

Q'ty

B 1

DE66-40001A

LATCH-BODY;POM(F20-02) 40GR NTR

1

B 2

3405-000178

SWITCH-MICRO;VP-533A-OF-PS(T85) 250V,15A

1

73579-203-207

B 3

3405-000175

SWITCH-MICRO;VP-531A-OF(T85) 250V,15A,20

1

73579-203-278

B 4

3405-000178

SWITCH-MICRO;VP-533A-OF-PS(T85) 250V,15A

1

73579-203-207

B 5

DE66-90001A

LEVER-SWITCH;P.O.M(F20-02) 2 6 NTR 2ND-W

1

Samsung Electronics

Remarks

Old Parts No.

7-3

Exploded Views and Parts List

7-6 Standard Parts List
Parts No.
DE60-10012A
DE60-10012A
DE60-10012A
DE60-10122A
DE60-10122A
DE60-10098A
DE60-10082I
DE60-10082I
DE60-10080A
DE60-10080A
DE60-10069A
DE02-00029A
DE60-10069A
DE60-10012A
DE60-10098A
DE60-10098A
DE60-10082J
DE60-10082I
DE60-10082I
DE60-10012A
DE60-10098A
DE60-10052A
DE60-10018A
DE60-10013A

7-4

Description / Specification
SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2
SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2
SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2
SCREW-TAP TH;TAP TH 2-4X8 FE FN
SCREW-TAP TH;TAP TH 2-4X8 FE FN
SCREW-ASSY TAPTITE;PH TC M4X8 SWRCH18A Z
SCREW-A;2S-4X12 FEFZY
SCREW-A;2S-4X12 FEFZY
SCREW-WASHER;M5 L12 2S
SCREW-WASHER;M5 L12 2S
SCREW-TAP TH;TH M4 L10 FRFZY
TAPE-SCOTCHPAR;POLYESTER 3M-893 W50
SCREW-TAP TH;TH M4 L10 FRFZY
SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2
SCREW-ASSY TAPTITE;PH TC M4X8 SWRCH18A Z
SCREW-ASSY TAPTITE;PH TC M4X8 SWRCH18A Z
SCREW-TAPPING;TH 2S-4X8 MSWR3 ZPC YEL WS
SCREW-A;2S-4X12 FEFZY
SCREW-A;2S-4X12 FEFZY
SCREW-TAP TITE;TH + 3 M4 L10 SWR10 ZPC2
SCREW-ASSY TAPTITE;PH TC M4X8 SWRCH18A Z
SCREW-TAP PH;PH M4 L8 FEFZY
SCREW-ASSY MACHINE;PH M4X0.7P 8 MSWR10 S
SCREW-ASSY TAP;TH 2S 4 L12 MSWR3 ZPC3 FI

Q'ty

Remarks

Old Parts No.

1
1
2
2
2
2
4
4
4
4
1
1
3
2
1
1
1
2
2
1
2
2
2
2

NO-FIL
P-CO-E
HI-UPP
C-CEIL
B/HEAT
MO/DRI
OUT-PN
B-PLTE
MGT
HVT
CV/AIR
TR-CUS
B/UPP
HI-LOW
MEM-PN
CV-TCO
B/HVC
BD-LAT
CON-PA
C/GE-M
MGT-TC
GR-TCO
B/EATH
CV/BLW

70504-0002-00
70504-0002-00
70504-0002-00
77128-240-085
77128-240-085
A0103-0010
77154-203-8201
77154-203-8201
77154-202-910
77154-202-910
77128-540-101
70859-800-311
77128-540-101
70504-0002-00
A0103-0010
A0103-0010
77154-203-8401
77154-203-8201
77154-203-8201
70504-0002-00
A0103-0010
77108-540-081
70504-0019-00
70504-0004-00

Samsung Electronics

8. P.C.B Diagrams
8-1 P.C.B Diagrams

Samsung Electronics

8-1

P.C.B Diagrams

8-2 P.C.B Parts List
Parts No.

8-2

Description / Specification

Q'ty

Remarks

0401-001002

DIODE-SWITCHING;1N4148M,100V,200mA,500mW

16

D5~20

0402-000559

DIODE-RECTIFIER;D4G,400V,1A,T-1

3

D01,2,4

0501-000283

TR-SMALL SIGNAL;KSA539-Y,PNP,400mW,TO-92

1

TR01

0501-000388

TR-SMALL SIGNAL;KSC815-Y,NPN,400mW,TO-92

1

TR03

2001-000003

R-CARBON;330ohm,5%,1/8W,AA,TP,1.8x3.2mm

2

R03,04

2001-000037

R-CARBON(S);330ohm,5%,1/2W,AA,TP,2.4x6.4

1

R02

2001-000273

R-CARBON;100Kohm,5%,1/8W,AA,TP,1.8x3.2m

1

R12

2001-000290

R-CARBON;10Kohm,5%,1/8W,AA,TP,1.8x3.2mm

6

R9,10,14,15,16,43

2001-000429

R-CARBON;1Kohm,5%,1/8W,AA,TP,1.8x3.2mm

7

R05~08,17~19

2001-000613

R-CARBON;3.9Kohm,5%,1/8W,AA,TP,1.8x3.2m

1

R11,13,20,21,22,23,42

2001-000776

R-CARBON;470ohm,5%,1/2W,AA,TP,3.3x9mm

1

R01

2001-000786

R-CARBON;47Kohm,5%,1/8W,AA,TP,1.8x3.2mm

12

R30~41

2011-001043

R-NETWORK;47Kohm,5%,1/8W,A,SIP,8P,BK

1

AR01

2202-000780

C-CERAMIC,MLC-AXIAL;UP050F104Z 100NF,+80

6

C6,9,10,11,12,15

2401-000247

C-AL;1SA1ANB107MAN 100UF,20%,10V,GP 6.3X

1

C04

2401-000353

C-AL;1SA1HWB101M 100UF,20%,50V,GP 10X16X

1

C02

2401-000914

C-AL;CESSL1C220M0511AA 22UF,20%,16V,GP 5

1

C05

2401-001412

C-AL;1SG1VFB477MAN 470UF,20%,35V,GP 10X1

1

C01

3501-001014

RELAY-POWER;OM1F-S-124LM 24V,21.8MA,17A

1

RY01

3501-001015

RELAY-POWER;OZF-S-124LM1P 24V,21.8MA,16A

1

RY04

3501-001016

RELAY-MINIATURE;JV24-KT 24V,12.5MA,5A 1F

2

RY02,03

3708-000528

CONNECTOR-FPC/FC/PIC;FCZ254-13SL,BLK 13P

1

CN02

3711-000203

CONNECTOR-HEADER;YW396-03AV WHT STRAIGHT

1

CN01

3711-000881

CONNECTOR-HEADER;SMW250-03,WHT BOX,3P,1R

1

CN03

A1018-0067

R-NETWORK;RN 1/8 X 6P 473-J T MHR5A473J

1

AR02

A1100-1049

C-CERAMIC;CC OA CH 50V T 220-J 3.5X1.9 U

6

C7,8,16~19

A4060-0008

TR-W/RESISTOR;KSR1005 300MW 100MA 50V EB

5

TR2,4~8

A4060-0009

TR-W/RESISTOR;KSR2005 300MW -100MA -50V

1

TR09

A4106-0154

DIODE-ZENER;TZP5.1B 5.1/5.7V 40MA T 1W

3

ZD1,2,3

A6010-0461

CONNECTOR-WAFER;YW396-04V WHT

1

CN04

B1283-0030

RESONATOR-CERAMIC;4.19MHZ 4.19MSTAR 2/CN

1

X-TAL

DE07-10081A

V.F.DISPLAY;SVM-4SM03 GRN/RSHORG 4 51 81

1

VFD

DE09-30479A

IC-MCU;KS56C671-43 DIP CE945G/CE745G

1

IC01

DE13-20009A

IC;KA7533 DIP

1

IC02

DE26-20141A

TRANS-L.V;SLV-945E 230V 50HZ AC17/2.9V

1

LVT1

DE30-20016A

BUZZER;CBE2220BA STICK

1

BUZ1

DE39-60001A

WIRE-SO COPPER;PI0.6 SN T 52MM

26

J01~26

DE60-60012A

PIN-EYELET;ID2.1 OD2.5 L3.0 SN BSP T0.25

8

E1~8

DE61-90004A

HOLDER-DIGITRON;NYLON#66 1.5 85 36 8GR B

1

Samsung Electronics

9. Schematic Diagrams
9-1 Schematic Diagrams
MGT
TCO

ASSY CHOKE P.C.B

H.V.TRANS

PRIMARYS/W
BLK

BLK

BLK

BLK

COM

C3

FUSE

BLU

BLK
230V40W

L

LAMP

WHT

1ND

GRILL
RELAY

F-MOTOR

L.V.TRANS

YEL
MAIN RELAY

WHT

RESISTOR

C1

HEATER

YEL

21V

DM

FM

H.V.FUSE
(0.75A-CE745G/
0.8A-CE945G)

COM

NC

0V

NO

H.V.CAPACITOR

ORG
WHT
BLK
INRUSH RELAY

BLK
MONITOR FUSE
(250V1.6A)

C2

CAVITY
TCO

BLU

H.V.DIODE

ORG
230V

BLU

D-MOTOR

POWER
CORD
230V/50HZ

230V

BLK

250V10A

BRN
CAVITY
TCO

BRN

RESISTOR

BLU

0V
F

BLU

YEL

FA

MAGNETRON

WHT

WHT
POWER RELAY
(SECONDARY INTERLOCK)
MAIN
RELAY

L.V.T

CONDITION OF OVEN

POWER
RELAY

INRUSH
RELAY

DOOR SENSING
S/W

GRILL
RELAY

KEY BOARD

1.INPUT : 230V
2.DOOR : OPEN
3.LAMP : ON
4.
: P.C.B PATTERN
5.
: P.C.B IN/OUT POINT

DOOR IS OPENED
COOK OFF

A S S Y M A I N P.C.B
WIRING COLOR
BRN : BROWN BLU : BLUE
WHT : WHITE ORG : ORANGE
RED : RED
YEL : YELLOW
BLK : BLACK
Y/G : YELLOW GREEN

COM NO

BLK

COM NO

BLK BLK

NC
COM NO

ORG
ORG

PRIMARY LATCH
SWITCH

WHT BLK
BLK BLU
BLK

DOOR SENSING
SWITCH

MONITOR
SWITCH

MAGNETRON

HIGH VOLTAGE
DIODE
FA

TO CHASSIS

F
HIGH VOLTAGE CAPACITOR
RED
RED

RED
H.V.FUSE
BLK
WHT

RED

SYMBOL COLOR
BRN BROWN
BLK
BLACK
RED
RED
BLU
BLUE

HIGH VOLTAGE
TRANSFORMER

Samsung Electronics

9-1



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