SAMSUNG CE124CFKUM Service Manual

MICROWAVE OVEN

CE124CF

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. PCB Diagrams

9. Schematic Diagrams

UHR

LEISTUNGGRILL

ZEIT/GEWICHT

AUFTAUEN

GAR-

AUTOMATIK

PLUS

HEISSLUFT MIKROWELLE

HEISSL

GRILL

HEISSL

LÖSCHEN START

CE124CF

SCHNELLGERICHTE

1.GETRÄNKE

2.FOLIENKARTOFFEL

3.PIZZA

4.POMMES FRITES

5.HAMBURGER/FISCHSTÄBCHEN

6.REIS/NUDELN

7.POPCORN

AUFWARMEN

8.FERTIGGERICHTE

9.QUICHE/AUFLAUF

10.EINTOPF

11.SUPPE/SAUCE

12.REIS/NUDELN

GAR.AUTOMATIK

13.RIND

14.SCHWEIN

15.GEFLÜGEL

16.GEFLÜGELSTÜCKE

17.FISCH

18.GEMÜSE(FRISCH)

19.GEMÜSE (GEFROREN)

MINUS

Samsung Electronics

(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.

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.

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

1. Precaution

1-1 Safety precautions ( )

Samsung Electronics 1-1

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. 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 immediatly.

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

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 emmission 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.10.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.

17. When checking the continuity of the switches 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. 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.

1-2

Pretaution

Samsung Electronics

1-2 Special Servicing Precautions (Continued)

1-3 Special High Voltage Precautions

=> : Touch chassis side first then short to the high voltage

capacitor terminal by using a screwdriver or jumper wire.

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 an insulated tool during operation.

PRECAUTION

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

2. Specifications

2-1 Table of Specifications

Samsung Electronics 2-1

MODEL CE124CF

ITEM

TIMER 99 MINUTES

POWER SOURCE 230V 50Hz, AC

POWER CONSUMPTION MAX : 3,000W

MICROWAVE : 1,600W

GRILL : 1,300W

CONVECTION : 1,400W

OUTPUT POWER 90W/900W(10 LEVEL POWER) (IEC-705 TEST PROCEDURE)

OPERATING FREQUENCY 2,450MHz

MAGNETRON OM75P(10)

COOLING METHOD COOLING FAN MOTOR

OUTSIDE DIMENSIONS 558(W) x 381(H) x 496(D)

3-1 Samsung Electronics

CONVECTION

MICROWAVE

P/LEVELGRILL

DEFROSTMW

CONV.

CLOCK

GRILL

CONV.

AUTO/DISH

LESS

INSTANT COOK

1.DRINKS

2.JACKET POTATO

3.PIZZA

4.OVEN CHIPS

5.BURGERS/FISH FINGERS

6.RICE/PASTA

7.POPCORN

AUTO REHEAT

8.PLATED MEAL

9.PIE/QUICHE

10.CASSEROLE

11.SOUP/SAUCE

12.RICE/PASTA(REHEAT)

AUTO COOK

13.ROAST BEEF

14.ROAST PORK

15.ROAST CHICKEN

16.CHICKEN PIECE

17.FISH

18.FRESH VEGETABLE

19.FROZEN VEGETABLE

TIMER/WEIGHT

STOP/CANCEL START

CE124CF

WINDOW DISPLAY AND INDICATOR LIGHTS * Funtion Indicator Lights indicate which cooking

funtion is being set or used. * Digital Display shows time of day or time left to cook. * Power Indicator Light Indicates which power is being set or used.

FUNCTION SELECTOR BUTTONS * Clock set

* Microwave, Power Level select * Defrost, Auto cook and Dish select * More, Less(Min Plus, Min Minus) * Convection, grill, Combination cook * Timer/Weight set * Stop/Cancel, Start

3. Operating Instructions

3-1 Control Panel

3-2 Features & Accessories

ROLLER RING

CONTROL PANEL

HEATER GRILL

BARBECUE BAR

HOLDER

OVEN LAMP

GLASS TRAY

OVEN DOOR

THERMIISTOR SENSOR

WINDOW DISPLAY

OPEN DOOR

UHR

LEISTUNGGRILL

ZEIT/GEWICHT

AUFTAUEN

GAR-

AUTOMATIK

PLUS

HEISSLUFT MIKROWELLE

HEISSL

GRILL

HEISSL

LÖSCHEN START

CE124CF

SCHNELLGERICHTE

1.GETRÄNKE

2.FOLIENKARTOFFEL

3.PIZZA

4.POMMES FRITES

5.HAMBURGER/FISCHSTÄBCHEN

6.REIS/NUDELN

7.POPCORN

AUFWARMEN

8.FERTIGGERICHTE

9.QUICHE/AUFLAUF

10.EINTOPF

11.SUPPE/SAUCE

12.REIS/NUDELN

GAR.AUTOMATIK

13.RIND

14.SCHWEIN

15.GEFLÜGEL

16.GEFLÜGELSTÜCKE

17.FISCH

18.GEMÜSE(FRISCH)

19.GEMÜSE (GEFROREN)

MINUS

COUPLER ROATING BASE TURNTABLE

TRAY

METAL

RACKS

BARBECUE

BAR

HOLDER CRUSTY PLATE MULTY SPIT

4 Magnetron flange nuts at top

Pin plate

screws (1) of damper

screws

(2) of Magnetron thermostat

Choke Coil

4. Disassembly and Reassembly

4-1 Replacement of Fan Motor and HVCapacitor

4-2 Replacement of Damper, Magnetron

4-3 Replacement of Lamp

Samsung Electronics 4-1

1. Remove out panel.

2. Disconnect all connectors and terminals.

3. Remove a screw 1) securing the fan motor bracket.

4. Remove two screws 2) at back plate.

5. Remove a screw 3) securing HVC bracket for removal of HVC.

1. After removing out panel and magnetron supporter, disconnect all the terminals and connectors from magnetron and damper assembly.

2. Remove four screws (1) securing damper Ass'y.

3. Remove two screws (2) securing magnetron thermostat.

4. Remove four magnetron flange nuts at top.

=> : 1) When removing the magnetron, make sure that

its antenna does not hit any adjacent parts, or it may be damaged.

2) when replacing the magnetron, be sure to remount the magnetron gasket in the correct position and make sure the gasket is in good condition.

3) Never install magnetron without metalic gasket plate, which should be packed with each magnetron to prevent microwave leakage.

4) Check microwave leakage after repair work is carried out on magnetron.

1) Remove out panel.

2) Remove two screws securing lamp holder.

(Top View) screw 1)

(Rear View)

screw 2)

screw 3) of HVC bracket

screws of lamp

Thermistor Probe

Thermal Cutout Switch

4-2 Samsung Electronics

Disassembly and Reassembly

4-4 Replacement of Door Assembly

4-7 Replacement of Casing Ass'y and Convection Heater

4-6 Replacement of Fuse

Remove hex bolts securing the upper hinge and lower hinge. Then remove the door Ass'y.

• 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 may leak from the clearance between the door and oven.

3. Perform the microwave leakage test.

4-5 Replacement of H.V.Transformer

1. Discharge the high voltage capacitor.

2. Disconnect all the leads from the high voltage transformer.

3. Remove the mounting bolts on the high voltage transformer.

4. When replacing, connect the leads correctly and firmly.

Disconnect the oven from the power source and remove the 15A fuse in the fuse holder in noise filter Ass'y.

1. Remove out panel and back panel.

2. Disconnect all connectors and terminals.

3. Remove air duct and support-back.

4. Remove screws 1) securing convection heater Ass'y.

5. Remove nut'2', blade fan'3', spring washer'4' and bushing'5'.

6. Remove convection assembly '11', '12' and cooling fan'10'.

7. Remove four screws '6'.

8. Remove heater cover '7' '9'. Then heater adiabatic '8' will be disassembled.

Flange Bolts of upper hinge

Bolts & a screw of lower hinge

screws 1) of convection heater

Samsung Electronics 4-3

Disassembly and Reassembly

4-9 Replacement of Control Circuit Board

4-8 Replacement of Drive Motor

• Be sure to ground any static electric charge in you

body and never touch the touch control circuitry.

1. Remove 3 screws securing control panel Ass'y to oven front.

2. Remove screws holding control panel bracket '7' to control panel '1'.

3. Disconnect film connector from PCBoard assembly '9'.

4. Remove 3 screws securing PCB Ass'y.

5. Pull out membrane'4', window display'5' and door button'2'.

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

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

3. Cut out the drive motor cover with nipper and remove it from the base plate.

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

5. Remove screws 1) securing the drive motor to the cavity.

6. Take out the drive motor.

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

1.DRINKS

2.JACKET POTATO

3.PIZZA

4.OVEN CHIPS

5.BURGERS/FISH

FINGERS

6.RICE/PASTA

7.POPCORN

AUTO REHEAT

8.PLATED MEAL

9.PIE/QUICHE

10.CASSEROLE

11.SOUP/SAUCE

12.RICEPASTA(REHEAT)

AUTO COOK

13.ROAST BEEF

14.ROAST PORK

15.ROAST CHICKEN

16.CHICKEN PIECE

17.FISH

18.FRESH VEGETABLE

19.FROZEN

VEGETABLE

INSTANT COOK

CLOCK

DEFROST

P/LEVEL

AUTOD/DISH

MORE/LESS

TIMER/WEIGHT

CANCEL

START

MICROWAVE

GRILL

CONVECTION

MW+CONV.

MW+GRILL

GRILL+CONV.

Cut eight points of drive motor cover.

After replacing the drive motor, insert boss to this tab and fit with two screws 2).

screws 1)

Lead wires

screws 2)

+ 18 hidden pages