Daewoo KOR-637V0S, KOR-637V, KOR-633V0S Service Manual

0 (0)

S/M No. : R637V0S001

Service Manual

Microwave Oven

Model: KOR-637V0S

KOR-633V0S

Caution

:In this Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information,please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr).

DAEWOO ELECTRONICS CO., LTD.

http : //svc.dwe.co.kr

Jan. 2002

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 power to the microwave oven 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.

TABLE OF CONTENTS
SAFETY AND PRECAUTIONS ...........................................................................................................................................	2
FOR SAFE OPERATION ......................................................................................................................................	2
FOR SAFE SERVICE PROCEDURES .................................................................................................................	2
SPECIFICATIONS ...............................................................................................................................................................	3
EXTERNAL VIEW................................................................................................................................................................	4
OUTER DIMENSION.............................................................................................................................................	4
FEATURE DIAGRAM ............................................................................................................................................	5
CONTROL PANEL ................................................................................................................................................	6
INSTALLATION ...................................................................................................................................................................	8
OPERATIONS AND FUNCTIONS.......................................................................................................................................	9
IMPORTANT SAFETY INSTRUCTIONS FOR STERILIZATION ......................................................................................	10
DISASSEMBLY AND ASSEMBLY....................................................................................................................................	11
INTERLOCK MECHANISM AND ADJUSTMENT.............................................................................................................	21
TROUBLE SHOOTING GUIDE .........................................................................................................................................	22
MEASUREMENT AND TEST ............................................................................................................................................	27
MEASUREMENT OF THE MICROWAVE POWER OUTPUT ............................................................................	27
MICROWAVE RADIATION TEST .......................................................................................................................	28
COMPONENT TEST PROCEDURE ...................................................................................................................	29
WIRING DIAGRAM............................................................................................................................................................	30
PRINTED CIRCUIT BOARD..............................................................................................................................................	31
CIRCUIT CHECK PROCEDURE ........................................................................................................................	31
PCB CIRCUIT DIAGRAM....................................................................................................................................	35
P.C.B. LOCATION NO ........................................................................................................................................	36
EXPLODED VIEW AND PARTS LIST...............................................................................................................................	37
DOOR ASSEMBLY .............................................................................................................................................	37
CONTROL PANEL ASSEMBLY..........................................................................................................................	37
TOTAL ASSEMBLY.............................................................................................................................................	37

SAFETY AND PRECAUTIONS

1. FOR SAFE OPERATION

Damage that allows the microwave energy (that cooks or heats the food) to escape will result in poor cooking and may cause serious bodily injury to the operator.

IF ANY OF THE FOLLOWING CONDITIONS EXIST, OPERATOR MUST NOT USE THE APPLIANCE. (Only a trained service personnel should make repairs.)

(1)A broken door hinge.

(2)A broken door viewing screen.

(3)A broken front panel, oven cavity.

(4)A loosened door lock.

(5)A broken door lock.

The door gasket plate and oven cavity surface should be kept clean.

No grease, soil or spatter should be allowed to build up on these surfaces or inside the oven. DO NOT ATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOR OPEN.

The microwave oven has concealed switches to make sure the power is turned off when the door is opened. Do not attempt to defeat them.

DO NOT ATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE MANUAL.

2.FOR SAFE SERVICE PROCEDURES

1.If the oven is operative prior to servicing, a microwave emission check should be performed prior to servicing the oven.

2.If any certified oven unit is found to servicing, a microwave emission check should be performed prior to servicing the oven.

(a)inform the manufacturer, importer or assembler,

(b)repair the unit at no cost to the owner,

(c)attempt to ascertain the cause of the excessive leakage,

(d)tell the owner of the unit not to use the unit until the oven has been brought into compliance.

3.If the oven operates with the door open, the service person should tell the user not to operate the oven and contact the manufacturer and CDRH immediately.

IMPORTANT

The wire in this mains lead coloured in accordance with the following code.

Green-and-yellow : Each

Blue	: Neutral
Brown	: Live

As the colours of the wires in the manins lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows.

The wire which is coloured green-and-yellow must be connected to the terminal in the plug which is marked with the letter ‘E’, earth symbol or coloured green-and-yellow.

The wire which is coloured blue must be connected to the terminal which is marked with the letter ‘N’ or coloured black.

The wire which is coloured brown must be connected to the terminal which is marked with the letter ‘L’ or coloured red.

NOTE

This oven is designed for counter-top use only.

SPECIFICATIONS

MODEL		KOR-637V0S	KOR-633V0S
POWER SUPPLY		120V~60Hz, SINGLE PHASE WITH GROUNDING

	MICROWAVE	1,200W

POWER	GRILL

CONSUMPTION	COMBINATION

	COMBINATION	10W

MICROWAVE ENERGY OUTPUT		800W

MICROWAVE FREQUENCY		2450MHz

OUTSIDE DIMENSIONS (W x H x D)		465 x 279 x 360 mm (18.3 x 11.0 x 14.2 in)	465 x 279 x 365 mm (18.3 x 11.0 x 14.4 in)

CAVITY DIMENSIONS (W x H x D)		290 x 220 x 306 mm (11.4 x 8.7 x 12.0 in)

NET WEIGHT		APPROX. 12.3kg (27.2 Ibs.)

TIMER		59 MIN. 00 sec.

FUNCTION SELECTIONS		MICROWAVE

POWER SELECTIONS		5 LEVELS

CAVITY VOLUME		0.7 Cu. Ft.

* SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

EXTERNAL VIEW

1. OUTER DIMENSION
(1) KOR-637V0S
465	360
	279
(2) KOR-633V0S

465/495	365/392
	279/294
	4

2. FEATURE DIAGRAM

1 SAFETY INTERLOCK SYSTEM

2DOOR SCREEN

Allows viewing of food. The screen is transparent to light, but prevents microwaves escaping.

3DOOR LATCH

When the door is closed, it will automatically shut off. If the door is opened while the oven operating, the magnetron tube will immediately stop operating.

4 OVEN CAVITY

5DOOR SEAL

Door seal surfaces prevent microwave escaping from the oven cavity.

7GLASS COOKING TRAY

Made of special heat resistant glass. The tray can be easily removed for cleaning. Make sure it is correctly positioned(indentation) before operating. Place food in a suitable container(dish ) on the tray.

8ROLLER GUIDE

Supports the glass cooking tray.

9COUPLER

This fits over the shaft in the center of the ovens cavity floor. This is to remain in the oven for all cooking.

0 UV LAMP

q CONTROL PANEL

3.CONTROL PANEL

(1)KOR-637V0S

	M/W DEF.	LOCK PURIFI	g
AUTO COOK		POWER/	CLOCK
	DEFROST
1
3
1.	Dinner Plote	STERILIZATION
2.	Soup
3.	Beverage
4.	Fresh Vegetable

	h
ig
e
W

	8
	START/
STOP/CLEAR	EASY COOK
6	7

1AUTO COOK

Used to cook using a program or to reheat.

2STERILIZATION

Used to sterilize baby bottle, cup, plate, etc.

3POWER/DEFROST

Used to set power level and to defrost foods by weight or time.

4CLOCK

Used to set clock.

5DISPLAY

Cooking time, power level, indicators and present time are displayed.

6STOP/CLEAR

Used to stop the oven operation or to erase all entries.

7START/EASY COOK

Used to start the oven operation and also increase the reheat time by 30 seconds.

8DIAL KNOB

Used to set the time and weight.

(2) KOR-633V0S

KOR-633V

AUTO COOK

1.Dinner Plate

2.Soup

3.Beverage

4.Fresh Vegetable

STERILIZATION

POWER/DEF.

CLOCK

M/W DEF. LOCK STERIL. g

STOP/

CLEAR

START/

EASY COOK

Weight/

Time

1AUTO COOK

Used to cook using a program or to reheat.

2STERILIZATION

Used to sterilize baby bottle, cup, plate, etc.

3POWER/DEF.

Used to set power level and to defrost foods by weight or time.

4CLOCK

Used to set clock.

5DISPLAY

Cooking time, power level, indicators and present time are displayed.

6STOP/CLEAR

Used to stop the oven operation or to erase all entries.

7START/EASY COOK

Used to start the oven operation and also increase the reheat time by 30 seconds.

8DIAL KNOB

Used to set the time and weight.

INSTALLATION

1. Steady, flat location.

This microwave oven should be set on a steady, flat surface.

This microwave oven is designed for counter top use only.

2. Leave space behind and side.

All air vents should be kept a clearance. If all vents are covered during operation, the oven may overheat and, eventually, cause failure.

3. Away from radio, and TV sets

Poor television reception and radio interference may result if the oven is located close to a TV, radio, antenna, or feeder and so on. Position the oven as far from them as possible.

4. Away from heating appliances and water taps

Keep the oven away from hot air, steam or splash when choosing a place to position it, or the insulation might be adversely affected and breakdowns occur.

5.Power supply

•Check your local power source.

This microwave oven requires a current of approximately 6 amperes, 230 Volts, 50 Hz.

•Power supply cord is about 0.8 meters long.

•The voltage used must be the same as specified on this oven. Using a higher voltage may result in a fire or other accident causing oven damage. Using low voltage will cause slow cooking. We are not responsible for damage resulting from use of this oven with a voltage of ampere fuse other than those specified.

•This appliance is supplied with cable of special type, which, if damaged, must be repaired with cable of same type.

Such a cable can be purchased from DAEWOO and must be installed by a Qualified Person.

6.Examine the oven after unpacking for any damage such as:

A misaligned door, broken door or a dent in cavity.

If any of the above are visible, DO NOT INSTALL, and notify dealer immediately.

7. Do not operate the oven if it is colder than room temperature

(This may occur during delivery in cold weather.) Allow the oven to become room temperature before operating.

EARTHING INSTRUCTIONS

This appliance must be earthed. In the event of an electrical short circuit, earthing reduces the risk of the electric shock by providing an escape wire for the electric current. This appliance is equipped with a cord having a earthing plug. The plug must be plugged into an outlet that is properly installed and earthed.

WARNING

Improper use of the earthing plug can result in a risk of electric shock. Consult a qualified electrician or serviceman if the earthing instructions are not completely understood, or if doubt exists as to whether the appliance is properly earthed, and either : If it is necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade earthing plut, and a 3-slot receptacle that will accept the plug on the appliance. The marked rating of the extension cord should be equal to or greater than the electrical rating of the appliance, or Do not use an extension cord.

OPERATIONS AND FUNCTIONS

1.Connect the main lead to an electrical outlet.

2.After placing the food in a suitable container, open the oven door and put it on the glass tray. The glass tray must always be in place during cooking.

3.Close the door securely.

4.When the oven door is opened, the light turns off.

5.The oven door can be opened at any time during operation by touching the door release button on the control panel. The oven will automatically shut off. To restart the oven, close the door and then press START button.

6.Each time a button is pressed, a BEEP will sound to acknowledge the touch.

7.The oven automatically cook on full power unless set to a lower power level.

8.The display will show : 0 when the oven is plugged in.

9.Time clock returns to the present time when the cooking time ends.

10.When the STOP/CLEAR buttion is pressed during the oven operation, the oven stops cooking and all information retained.

To erase all information (except the present time), press the STOP/CLEAR button once more. If the oven door is opened during the oven operation, all information is retained.

11.If the START buttion is pressed and the oven does not operate, check the area between the door and door seal for obstructions and make sure the door is closed securely. The oven will not start cooking under the door is completely closed or the program has been reset.

12.When using the STERILIZATION mode:

•After sterilize metal tablewares, take out them certainly. If not so, pressing other buttons it can be happened to spark.

•Do not use the glass tray only for the STERILIZATION mode.

Make sure the oven is properly installed and plugged into the electrical outlet.

Wattage output chart

The power level is set by pressing the POWER/DEFROST button. The chart shows the display, the power level and the percentage of power.

Press POWER/DEFROST	Power level(Display)	Approximate Percentage of Power

Once	P-HI	100%

Twice	P-80	80%

3 times	P-60	60%

4 times	P-40	40%

5 times	P-20	20%

IMPORTANT SAFETY INSTRUCTIONS FOR STERILIZATION

1.Do not use the oven for the food.

2.Caution: Surface of utensil, tableware, etc., must be directly exposed to UV light for effective sterilization. The ultraviolet ray can’t penetrate through the materials such as glass, metal and plastic.

3.For proper sterilization, utensils and cookware must be properly cleaned/washed before sterilizing.

4.Do not expose skin or eyes to UV radiation, excessive exposure may cause injury to skin or eyes.

5.UV lamp is only to be replaced by the type identified and by a properly trained service personnel.

6.Additional instructions may be required based on experience resulting from conduct of efficacy testing.

7.Do not use the oven for the medical use.

STERILIZATION

This function allow you to sterilize tableware.

For proper sterilization, utensils and cookware must be properly cleaned/washed before sterilizing.

Place the shelf on the glass cooking tray. Be repeatedly pressing STERILIZATION button, you can extend sterilizing time from 3 minutes to 30 minutes. (3, 5, 10, 20, 30 minutes)

STERILIZATION

1. Press STERILIZATION button.	When you press STERILIZATION button, "3:00" appears.
	After 1.5 seconds, the oven starts sterilizing and STERIL
	indicator starts blinking to show the oven is Sterilization
	mode. The display counts down the time to show you how
	much sterilizing time is left in the Sterilization mode.

NOTE: After sterilizing, if you don’t open the door, and press other buttons except STERILIZATION, “door” is displayed and a beep sounds. In this case, when you open and close the door once, oven is operated nomally.

CAUTION: After you sterilize metal tableware, if you don’t take out it and you touch other buttons, it can be happened to spark.

REAR

(INSIDE OF CAVITY)

FRONT (DOOR SIDE)

OVER 30 MINUTES

OVER 20 MINUTES OVER 10 MINUTES

OVER 3 MINUTES

"ESPECIALLY, PLACE THE BABY BOTTLE HERE."

•These instructions are based on experience resulting from conduct of efficacy testing by using petri dishes.

•The deep shaped utensil such as a feeding bottle shall be needed more sterilizing time than described above diagram.

NOTE:

1.A shelf should be placed during UV-sterilization operation.

2.Do not use the shelf during microwave cooking.

3.For better UV-sterilization, depression shaped utensil such as a feeding bottle or a cup shall be placed on the front area of the shelf.

DISASSEMBLY AND ASSEMBLY

Cautions to be observed when trouble shooting.

Unlike many other appliances, the microwave oven is high-voltage, high-current equipment. It is completely safe during normal operation.

However, carelessness in servicing the oven can result in an electric shock or possible danger from a short circuit. You are asked to observe the following precautions carefully.

1.Always remove the power plug from the outlet before servicing.

2.Use an insulated screwdriver and ware rubber gloves when servicing the high voltage side.

3.Discharge the high voltage capacitor before touching any oven components or wiring.

(1)Check the grounding.

Do not operate on a two-wire extension cord.

The microwave oven is designed to be used with earthed.

It is imperative, therefore, to make sure it is earthed properly before beginning repair work.

(2) Warning about the electric charge in the high voltage capacitor.

For about 30 seconds after the operation stopped and electric charge remains in the high voltage capacitor.

When replacing or checking parts, short between oven chassis and the negative high terminal of the high voltage capacitor by using a properly insulated screwdriver to discharge.

4. When the 12A fuse is blown out due to the operation of the monitor switch; replace primary interlock switch, secondary interlock switch and interlock monitor switch.

5.After repair or replacement of parts, make sure that the screws are properly tightened, and all electrical connections are tightened.

6.Do not operate without cabinet.

CAUTION : Service personnel should remove their watches whenever working close to or replacing the magnetron.

WARNING : When servicing the appliance, need a care of touching or replacing high potential parts because of electrical shock or exposing microwave. These parts are as follows - HV Transformer, Magnetron, HV Capacitor, HV Diode HV Fuse.

1.To remove cabinet

1)Remove three screws on cabinet back.

2)Push the cabinet backward.

2. To remove door assembly

1) Remove two screws which secure the stopper hinge top.

2)Remove the door assembly from top plate of cavity.

3)Reverse the above for reassembly.

NOTE : After replacing the door assembly, perform a check of correct alignment with the hinge and cavity front plate.

Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr)

3.To remove door parts.

(1)KOR-637V0S

A06

A05

A04

A03

A02

A01

	A07
A15	A08

A14

A13

A09

A10

A11

A12

REF NO.	PART CODE	PART NAME	DESCRIPTION	Q’TY	REMARK
A01	3512205230	FRAME DOOR	ABS SG-175 SG-0760D	1

A02	3517005670	BARRIER SCREEN *O	TEMP GLASS T3.2	1

A03	3515204100	STOPPER HINGE *T AS	KOR-63150S	1

A04	3511706120	DOOR PAINTING AS	KOR-634R0S	1

A05	3517002800	BARRIER SCREEN *I	PET 0.1	1

A06	3512300200	GASKET DOOR	PP	1

A07	3513100730	HOOK	POM BLACK	1

A08	3515101320	SPRING HOOK	HSW-3	1

A09	7112402011	SCREW TAPPING	T1 TRS 4X20 MFZN	2

A10	3511606100	DECORATOR DOOR*R	STS304 T0.5H/L	1

A11	3512603220	HANDLE DOOR	CR T0.9	1

A12	3515307300	SUPPORTER HANDLE	ABS SG-175	2

A13	3511605900	DECORATOR DOOR *U	STS304 T0.5H/L	1

A14	3511606200	DECORATOR DOOR *L	STS304 T0.5H/L	1

A15	3511605800	DECORATOR DOOR *T	STS304 T0.5H/L	1

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