Daewoo KOG-368Q0S, KOG-369Q0s Service Manual

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 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 gernerating compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment, intergrity, and connections.

(d)Any defective or misadjusted components in the interlock, monitor, door seal, and microwave gerneration and transmission systems shall be repaired, or adjusted by procedures described in this manual before the oven is released to the owner.

(e)A micrewave 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

 

PROPER USE AND SERVICE PRECAUTIONS.....................................................................................................

2

SPECIFICATIONS....................................................................................................................................................

3

FEATURES DIAGRAM ............................................................................................................................................

4

EARTHING INSTRUCTIONS...................................................................................................................................

5

INSTALLATION ........................................................................................................................................................

5

OPERATION PROCEDURE ....................................................................................................................................

6

CONTROLS..............................................................................................................................................................

7

INTERLOCK MECHINISM FUNCTIONS AND ADJUSTMENTS............................................................................

19

SAFTY PRECAUTIONS FOR DISASSEMBLY AND REPAIR................................................................................

21

DISASSEMBLY AND ASSEMBLY...........................................................................................................................

22

TROUBLE SHOOTING GUIDE................................................................................................................................

28

MEASUREMENT OF THE MICROWAVE OUTPUT POWER................................................................................

35

WIRING DIAGRAM ..................................................................................................................................................

37

CIRCUIT DESCRIPTION .........................................................................................................................................

39

COMPONENT TEST PROCEDURE .......................................................................................................................

42

SAFETY INTERLOCK CONTINUITY TEST ............................................................................................................

43

PRINTED CIRCUIT BOARD ....................................................................................................................................

44

CIRCUIT CHECK PROCEDURE.........................................................................................................................

44

COMPONENT INFORMATION............................................................................................................................

49

PRINTED CIRCUITS BOARD..............................................................................................................................

50

P.C.B. CIRCUIT DIAGRAM..................................................................................................................................

51

P.C.B. LOCATION NO .........................................................................................................................................

52

EXPLODED AND PARTS LIST ...............................................................................................................................

53

1

CAUTION : This Device is to be Serviced Only by Properly Qualified Service Personnel. Consult the Service Manual for Proper Service Procedures to Assure Continued Safety Operation and for Precautions to be Taken to Avoid Possible Exposure to Excessive Microwave Energy.

PROPER USE SERVICE 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 tok 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 have excessive emission level 5mW/cm2, the service person should:

(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.

CAUTIOU

MICROWAVE RADIATION

PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE FROM THE MAGNETRON OR OTHER MICROWAVE GENERATING DEVICE IF IT IS IMPROPERLY USED OR CONNECTED. ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS. WAVEGUIDE, FLANGES AND GASKETS MUST BE SECURE. NEVER OPERATE THE DEVICE WITHOUT A MCROWAVE ENERGY ABSORNING LOAD ATTACHED. NEVER LOOK INTO AN OPEN WAVEGUIDE OR ANTENNA WHILE THE DEVICE IS ENERGIZED.

2

SPECIFICATIONS

Item

 

Specification

POWER SUPPLY

 

230V~50Hz, SINGLE PHASE WITH EARTHING

 

 

MICROWAVE

1200 W

POWER CONSUMPTION

 

GRILL

1050 W

 

 

COMBINATION

2200 W

 

 

 

MICROWAVE ENERGY OUTPUT

800 W (IEC 705)

 

 

 

 

MICROWAVE FREQUENCY

 

2450 MHz

 

 

 

OUTSIDE DIMENSIONS (W x H x D)

465 x 274 x 352 mm

 

 

 

CAVITY DIMENSIONS (W x H x D)

290 x 200 x 290 mm

 

 

 

 

NET WEIGHT

 

14.5kg

TIMER

 

59 min. 99 sec.

FUNCTION SELECTIONS

 

MICROWAVE / GRILL / COMBINATION

MICROWAVE POWER LEVELS

10 – LEVELS

ƒN Specifications subject to change without notice.

3

Daewoo KOG-368Q0S, KOG-369Q0s Service Manual

FEATURES DIAGRAM

¤Door latch–When the door is closed it will automatically lock shut. If the door is opened while the oven is operating. The magnetron will automatically shut off.

¤Ł Door seal–The door seal maintains the microwave within the oven cavity and prevents microwave leakage.

¤ØOven cavity.

¤Œ Spatter shield–Protects the microwave outlet from splashes of cooking foods.

¤º Safety interlock system–Prevents the oven from operating while the door is opened.

¤Door release button–Pushing this button stops oven operation and opens the door.

¤Glass cooking tray–Made of special heat resistant glass. The tray must always be in proper position before operating. Do not cook food directly on the tray.

¤Roller guide–Supports the glass cooking tray.

¤Door screen–Allows viewing fof food. The Screen is designed so that light can pass through, but not the microwaves.

¤Time set pad–Used to set the cooking time and the present time

¤æ Display–Cooking time, power level, present time are displayed.

¤Speedy cook–Touch to set the any desired reheat setting.

¤Combi–Uesd to cook COMBI.

¤Grill–Used to cook Grill.

¤ıBaked potato–Used to cook baked potato.

§Dinner plate–Used to reheat dinner plate. §æSoup–Used to reheat Soup.

§Beverage–Used to reheat beverage.

§Frozen pizza–Used to reheat frozen pizza.

§Fresh vegetable–Used to blanch fresh vegetable.

§ıMore–Used to add on one touch cooking.

§Less–Used to remove one touch cooking.

§Auto defrost–Used to defrost foods.

§łPower–Used to set power level.

§ø Clock/A.start–User to set clock & Used to set auto start.

§œFeeding bottle–Used to disinfect bottle.

§ßStop/Clear–Used to stop the oven operation or to delete the cooking data.

§Start–Used to start a selected operation.

§Reflector (Insulator Heater).

§Heating Element.

3 Metal Rack.

3 Coupler.

4

EARTHING INSTRUCTIONS

This appliance must be earthed. In the event of an electrical short circuit, earthing reduces the risk of electric shock by providing an escape, wire for the electric current. This appliance is equipped with a cord having a earthing wire with a earthing plug. The ploug 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 extension to whether the appliance is properly earthed. If it necessary to use an extension cord, use only a 3-wire extension cord that has a 3-blade earthing plug, 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.

INSTALLATION

1

2

3

4

5

6

Steady, flat location

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

This oven is designed for counter top use only.

Leave space behind and side

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

Away from Radio and TV sets

Poor television reception and radio interference may result if the oven is located close to a TV, Radio, or antenna, feeder and so on.

Position the oven as far from them as possible.

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.

Power supply

ƒUCheck uour local power source. This oven requires a current of approximately 12 amperes. 230V 50Hz. ƒUPower supply cord is about 1.1 meters long.

ƒUThe 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.

ƒUThis 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.

Examine the oven after unpacking for any damage such as:

QA misaligned door, broken door, 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 termperature.

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

5

OPERATION PROCEDURE

This section includes useful information about oven operation.

1.Plug power supply cord into a 230V 50Hz power 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.Shut the door. Make sure that it is firmly closed.

1 Whenoff. the oven door is opened, the light turns

2 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 touch START.

3 Each time a pad is touched, a BEEP will sound to acknowledge the touch.

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

5 The display will show “ : 0” when the oven is plugged in.

6 Time clock returns tol the present time when the cooking time ends.

7 When the STOP/CLEAR pad is touched during the oven operation, the oven stops cooking and all information retained. To erase all information retained. To erase all information (except the present time), touch the STOP/CLEAR pad once more. lf the oven door is opened during the oven operation, all information is retained.

8 If the START pad is touched and the oven does not operate, check the area between the door and door is closed securely. The oven will not start cooking until the door is completely closed or the program has been reset.

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 pad. The chart shows the display, the power level and the percentage of power.

Touch Power pad,

Power Level (Display)

Approximate Percentage

Once the touch

of Power

 

 

 

 

POWER

P-HI

100%

 

 

 

9

P-90

90%

 

 

 

8

P-80

80%

 

 

 

7

P-70

70%

 

 

 

6

P-60

60%

 

 

 

5

P-50

50%

 

 

 

4

P-40

40%

 

 

 

3

P-30

30%

 

 

 

2

P-20

20%

 

 

 

1

P-10

10%

 

 

 

0

P- 0

0%

 

 

 

6

CONTROL

SETTING THE CLOCK

When the oven is first plugged in, the display will flash “ : 0” and a tone will sound. If the AC power ever goes off, the display will flash “ : 0” when the power comes back on.

 

DO THIS

THIS HAPPENS...

 

 

 

This is a 12 hour clock system.

 

CLOCK/

 

 

 

 

 

A.START

 

 

 

 

 

 

1. Touch CLOCK / A.START pad.

 

CLOCK/

A.START

2.Touch CLOCK/A.START pad once more.

This is a 24 hour clock system.

NOTE : This oven is multiple clock system. If you want 12 hour clock system, can be omitted this step.

1 2 3 0

3.Enter the correct time of day by touching the numbers in sequence.

The display will then begin blinking.

CLOCK/

A.START

4. Touch CLOCK/A.START pad.

The display stop blinking and the colon starts blinking.

If you selected 12 hour clock system this digital clock allows you to set from 1:00 to 12:59.

If you selected 24 hour clock system, this digital clock allows you to set from 0:00 to 23:59

NOTE : If you attempt to enter an incorrect time, the time will not be set and a error signal tone will sound. Touch the CLOCK/A.START pad re-enter the time.

7

WEIGHT DEFROSTING

WEIGHT DEFROST lets you easily defrost food by eliminating guesswork in determining defrosting time. The minimum weight for WEIGHT DEFROST is 200 grams. The maximum weight for WEIGHT DEFROST is 3000 grams. Follow the steps below for easy defrosting.

 

DO THIS

THIS HAPPENS...

 

 

 

The WEIGHT DEFROST indicator

 

AUTO

 

 

 

lights and “0” is displayed. And the

 

DEFROST

 

 

 

g indicator starts blinking.

 

 

 

1. Touch AUTO DEFROST pad.

 

5 0 0

2.Touch number pads for the defrosting weight

you want.

The display will show the numbers you pressed in the order you touched.

START

3. Touch START pad.

WEIGHT DEFROSTING begins. The defrosting time is automatically determined by the food category and weight entered.

The g indicator goes off and the WEIGHT DEFROST indicator blinks and the defrosting time counts down in the display window. The oven beeps during the defrosting cycle to signal that the food needs to be turned or rearranged.

When the defrosting time ends, you will hear 3 beeps.

NOTE : To prevent over defrosting thin areas or edges can be shielded with strips of aluminum foil.

8

TIME DEFROSTING

When TIME DEFROST is selected, the automatic cycle divides the defrosting time into periods of alternating defrost and stand times by cycling on and off.

DO THIS

AUTO

DEFROST

The WEIGHT DEFROST indicator lights and “0” is displayed. And the g indicator starts blinking.

1. Touch AUTO DEFROST pad.

AUTO

DEFROST

2.Touch AUTO DEFROST pad once more.

The TIME DEFROST indicator lights and “ : 0” is displayed.

The display will show the numbers you pressed in the order you touched.

3.

NOTE : Your oven can be programmed for 59 minutes 99 seconds. (59:99)

START

4. Touch START pad.

When you touch START pad, the TIME DEFROST indicator starts blinking to show the oven is in the TIME DEFROST mode. The display counts down the time to show you how much defrosting time is left in the TIME DEFROST mode. The oven beeps during the defrosting cycle to signal that the food needs to be turned or rearranged. When the defrosting time ends, you will hear 3 beeps.

NOTE : To prevent over defrosting, thin areas or edges can be shielded with strips of aluminum foil.

9

COOKING IN ONE STAGE

The M/W indicator lights and “P- ” is displayed.

1.

3

2.

5 3 0

3.

The display will show what you touched. This example shows power level 3.

NOTE: If steps 1 and 2 are omitted, the oven will cook at full power.

The display will show the numbers you pressed in the order you touched.

NOTE: Your oven can be programmed for 59 minutes 99 seconds. (59:99)

START

4. Touch START pad.

When you touch START pad, the M/W indicator starts blinking to show the oven is cooking.

The display counts down the time to show how much cooking time is left. When the cooking time ends, you will hear 3 beeps.

NOTE: Using lower power levels increase the cooking time which is recommended for foods such as cheese, milk and slow cooking of meats.

10

GRILL COOKING

This function allows you to brown food quickly.

 

The heating element is located in the top of the oven.

 

There

when setting the controls.

 

 

 

 

 

 

 

The GRILL indicator lights and

 

 

 

1.

 

 

“ :0” is displayed.

 

 

 

 

 

2 5 0 0

2.

The display will show the numbers you pressed in the order you touched.

This example shows 25 minutes.

NOTE: Time can be set up to 30 minutes.

START

3. Touch START pad.

When you touch START pad, the GRILL indicator starts blinking to show the oven is cooking.

The display count down the time to show how much cooking time is left. When the cooking time ends, you will hear 3 beeps.

11

COMBI COOKING

This oven has combination mode which cooks food with heater and microwave at the same time. The combination mode accelerates the cooking process.

DO THIS...

THIS HAPPENS...

The COMBI indicator lights and “ :0” is displayed.

Pressing this pad repeatedly 1. changes category as shown in the

chart below.

CATEGORY

TOUCH PAD

APPROXIMATE PERCENTAGE OF MICROWAVE POWER

 

 

 

:0

 

ONCE

50%

 

 

 

 

 

 

 

 

 

 

 

 

HI

 

TWICE

60%

 

 

 

 

 

 

 

 

 

 

 

 

LO

 

3 TIMES

40%

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

0

0

0

The display will show the numbers

you pressed in the order you

 

 

 

 

 

 

 

 

touched.

 

 

 

 

This example shows 20 minutes.

 

 

 

 

 

 

 

 

 

 

 

NOTE: Time can be set up to

 

 

 

 

 

 

59 minutes 99 sec-

 

 

 

 

 

 

onds.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

START

3. Touch START pad.

When you touch START pad, the COMBI indicator starts blinking to show the oven is cooking.

The display count down the time to show how much cooking time is left. When the cooking time ends, you will hear 3 beeps.

12

AUTO START

Allows you to program cooking to start at a time you select.

The food will automatically start cooking at the desired time.

DO THIS...

THIS HAPPENS...

The AUTO START indicator lights and “ :0” is displayed.

1

 

1

 

3

 

0

The display will show the numbers

 

 

 

you pressed in the order you

 

 

 

 

 

 

 

 

 

 

 

 

 

 

touched.

 

 

 

 

 

 

 

This example shows 11:30

START

4. Touch START pad.

When you touch START pad, the present time appears in the display and the cooking program indicators come on.

The AUTO START indicator and the colon start blinking.

When the selected start time arrives the oven bigins. Operating and the oven light turns on. The AUTO START indicator goes off and the next stage indicator begins to blink.

When the cooking is completed you will hear 3 beeps. The oven turns off and the present time appears in the display.

NOTE: AUTO START can be used for time cooking, if clock is set. If the oven door is opened after programming AUTO START, it is necessary to touch the START pad for the time of day to appear in the readout so that the oven will automatically begin programmed cooking at the chosen AUTO START time. Before setting, check to make sure the clock is showing the correct time of day.

13

TO CHECK AUTO START TIME

Once you have correctly programmed the oven for AUTO START, the present time will appear on the display.

DO THIS...

THIS HAPPENS...

CLOCK/

A.START

1. Touch CLOCK/A.START pad.

The programmed AUTO START time will appear on the display for 3 seconds.

SPEEDY COOK

SPEEDY COOK allows you to reheat for 30 seconds at 100% (full power) by simply touching the SPEEDY COOK pad.

By repeatedly touching the SPEEDY COOK pad, you can also extend reheating time to 5 minutes by 30 seconds.

DO THIS...

THIS HAPPENS...

When you touch SPEEDY COOK, “ :30” is displayed.

After 1.5 seconds, the oven starts reheating.

14

ONE TOUCH COOKING

One touch cook allows you to cook or reheat many of your favorite foods by touching just one pad. To increase quantity, touch chosen pad until number in display is same as desired quantity to cook. (except for DINNER

When you touch FROZEN PIZZA, “200” is displayed.

After 1.5 seconds, the display changed into cooking time of quantity and the oven starts cooking.

ƒNFORZEN PIZZA ƒN

¡200g: Touch FROZEN PIZZA once.

¡300g: Touch FROZEN PIZZA twice within 1.5 seconds.

NOTE: 1. Use only one frozen pizza at a time.

2.Use only frozen pizza for microwave oven.

3.If the cheese of frozen pizza does not melt sufficiently, cook a few seconds longer.

4.Some brands of frozen pizza may require more or less cooking time.

When you touch BEVERAGE pad, “1” is displayed.

After 1.5 seconds, the display changed into cooking time of quantity and the oven starts cooking.

15

ƒNBEVERAGE ƒN(250ml/cup)

¡1 cup (mug): Touch BEVERAGE once.

¡2 cups (mugs): Touch BEVERAGE twice within 1.5 seconds.

¡3 cups (mugs): Touch BEVERAGEthree times within 1.5 seconds.

NOTE: 1. This setting is good for restoring cooled beverage to a better drinking temperature. 2. Stir after cooking.

DO THIS...

THIS HAPPENS...

When you touch DINNER PLATE pad, “300“ is displayed.

After the 1.5 seconds, the display changed into cooking time of quantity and the oven starts cooking.

NOTE: For best results, consult the cookbook.

DO THIS...

THIS HAPPENS...

When you touch SOUP pad, “250” is displayed.

After the 1.5 seconds, the display changed into cooking time of quantity and the oven starts cooking.

ƒNSOUP ƒN

¡250g: Touch SOUP once.

¡350g: Touch SOUP twice within 1.5 seconds.

NOTE: For best results, consult the cookbook.

16

DO THIS...

THIS HAPPENS...

When you touch FRESH VEGETABLE pad, “200” is displayed. After the 1.5 seconds, the display changed into cooking time of quantity and the oven starts cooking.

ƒNFRESH VEGETABLE ƒN

¡200g: Touch FRESH VEGETABLE once.

¡300g: Touch FRESH VEGETABLE twice within 1.5 seconds.

NOTE: For best results, consult the cookbook.

DO THIS...

THIS HAPPENS...

BAKED

POTATO

1. Touch BAKED POTATO pad.

When you touch BAKED POTATO pad, “1” is displayed.

After the 1.5 seconds, the display changed into cooking time of quantity and the oven starts cooking.

ƒNBAKED POTATO ƒN(160~180g/ea.)

¡1 NO (ea.): Touch BAKED POTATO once.

¡2 NO (ea.): Touch BAKED POTATO twice within 1.5 seconds.

¡3 NO (ea.): Touch BAKED POTATO three times within 1.5 seconds.

NOTE: For best results, consult the cookbook.

17

FEEDING BOTTLE

This key is for feeding bottle disinfection

At first, detach the nipple from the bottle bottle, arrange the bottle symmetrically on the glass tray and operate.

DO THIS...

FEEDING

BOTTLE

1.Touch FEEDING BOTTLE pad.

When you touch FEEDING BOTTLE pad, “2” is displayed.

After the 1.5 seconds, the display changed into sterilizing time of quantity and the oven starts sterilizing.

ƒNFEEDING BOTTLE ƒN

¡2 NO (ea.): Touch FEEDING BOTTLE once.

¡4 NO (ea.): Touch FEEDING BOTTLE twice within 1.5 seconds.

¡6 NO (ea.): Touch FEEDING BOTTLE three times within 1.5 seconds.

MORE, LESS

MORE pad: adds for 10 seconds to 20 seconds. LESS pad: remove for 10 seconds to 20 seconds.

These pad only work one touch cooking and feeding bottle mode. And always input previously.

CHILD SAFETY LOCK

The safety lock prevents unwanted oven operation such as by small children. To set, press STOP/CLEAR for 3 seconds, LOCK indicator lights.

To cancel, press STOP/CLEAR for 3 seconds, LOCK indicator goes off.

TO STOP THE OVEN WHILE THE OVEN IS OPERATING

1.Press STOP/CLEAR pad.

¡You can restart the oven by touching START pad.

¡Touch STOP/CLEAR once more to erase all instructions.

¡You must enter in new instructions.

2.Open the door.

¡You can restart the oven by closing the door and touching START.

NOTE: Oven stops operating when door is opened.

18

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