SAMSUNG CE124CFKUM Service Manual

MICROWAVE OVEN

CE124CF

SERVICE

MICROWAVE OVEN

HEISSLUFT		MIKROWELLE
GRILL		LEISTUNG
MW+HEISSL		AUFTAUEN
MW+GRILL	SCHNELLGERICHTE
GRILL+HEISSL		GAR-
		AUTOMATIK
	AUFWARMEN
		PLUS
UHR	GAR.AUTOMATIK
		MINUS
	ZEIT/GEWICHT
	LÖSCHEN	START
		CE124CF

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

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TOAVOID 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.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/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 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.

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1-1

Pretaution

1-2 Special Servicing Precautions (Continued)

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.

1-3 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.

=> : 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.

1-2	Samsung Electronics

2. Specifications

2-1 Table of Specifications

ITEM	MODEL	CE124CF
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)

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2-1

3. Operating Instructions

3-1 Control Panel

CONVECTION		MICROWAVE
GRILL		P/LEVEL
MW+CONV.		DEFROST
MW+GRILL	INSTANT COOK
	1.DRINKS
	2.JACKET POTATO
	3.PIZZA
	4.OVEN CHIPS
GRILL+CONV.	5.BURGERS/FISH FINGERS	AUTO/DISH
	6.RICE/PASTA
	7.POPCORN
	AUTO REHEAT
	8.PLATED MEAL
	9.PIE/QUICHE
	10.CASSEROLE	MORE
	11.SOUP/SAUCE
CLOCK	12.RICE/PASTA(REHEAT)
	AUTO COOK
	13.ROAST BEEF
	14.ROAST PORK
	15.ROAST CHICKEN
	16.CHICKEN PIECE	LESS
	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

3-2 Features & Accessories

	THERMIISTOR SENSOR	OVEN LAMP
		HEATER GRILL

OVEN DOOR

HEISSLUFT		MIKROWELLE
GRILL		LEISTUNG
MW+HEISSL		AUFTAUEN
MW+GRILL	SCHNELLGERICHTE
GRILL+HEISSL		GAR-
		AUTOMATIK
	AUFWARMEN
		PLUS
UHR	GAR.AUTOMATIK
		MINUS
	ZEIT/GEWICHT
	LÖSCHEN	START
		CE124CF

WINDOW DISPLAY

CONTROL PANEL

GLASS TRAY

OPEN DOOR

BARBECUE BAR	ROLLER RING
HOLDER

	COUPLER ROATING BASE TURNTABLE	METAL	BARBECUE	HOLDER	CRUSTY PLATE	MULTY SPIT
	TRAY	RACKS	BAR
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4. Disassembly and Reassembly

4-1 Replacement of Fan Motor and HVCapacitor

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.

4-2 Replacement of Damper, Magnetron

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.

(Top View)		screw 1)

(Rear View)

screw 2) screw 3) of HVC bracket

4 Magnetron flange nuts at top

Pin plate

screws (1) of damper

screws

(2) of Magnetron thermostat

Choke Coil

4-3 Replacement of Lamp

screws of lamp

1) Remove out panel.

2) Remove two screws securing lamp holder.

Thermistor Probe

Thermal Cutout Switch

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4-1

Disassembly and Reassembly

4-4 Replacement of Door Assembly

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.

Flange Bolts of upper hinge

Bolts & a screw of lower hinge

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.

4-6 Replacement of Fuse

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

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

			12
			10
			11
		6	9
		4
	2	5	8
			7
		3

screws 1) of convection heater

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.

4-2	Samsung Electronics

Disassembly and Reassembly

4-8 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.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.

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)

4-9 Replacement of Control Circuit Board

•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'.

6

3

				CONVECTION
				GRILL	MICROWAVE
				MW+CONV.	P/LEVEL
				MW+GRILL	DEFROST
INSTANT1.				GRILL+CONV.
3.JACKET
2.DRINKSCOOK
4.PIZZA		POTATO
5.OVEN
6.	CHIPS
RICE/PASTABURGERS/FISH					AUTOD/DISH
7.
8AUTO.POPCORN			FINGERS	CLOCK
9.PLATEDREHEAT					MORE/LESS
10.		MEAL
11PIE/QUICHE.
12.CASSEROLE
SOUP/SAUCE
14.RICEPASTA(REHEAT)ROAST
AUTO	COOK
13.
15.ROASTBEEF
16.ROASTPORK
17.CHICKENCHICKEN					TIMER/WEIGHT
19.FRESH		PIECE
18.FISH
FROZENVEGETABLE
		VEGETABLE			CANCEL
					START

7

9

8

1

2

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