Daewoo KOG-368Q0S, KOG-369Q0s Service Manual
1
PRECAUTIONS TO BE OBSER VED BEFORE AND
DURING SERVICING T O 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 gernera-
tion 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 per-
formed on each oven prior to release to the owner.
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
TABLE OF CONTENTS
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.
PROPER USE SERVICE PRECAUTIONS
2
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.
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.
ƒNSpecifications subject to change without notice.
Item
POWER SUPPLY
MICROWAVE
POWER CONSUMPTION
GRILL
COMBINATION
MICROWAVE ENERGY OUTPUT
MICROWAVE FREQUENCY
OUTSIDE DIMENSIONS (W x H x D)
CAVITY DIMENSIONS (W x H x D)
NET WEIGHT
TIMER
FUNCTION SELECTIONS
MICROWAVE POWER LEVELS
Specification
230V~50Hz, SINGLE PHASE WITH EARTHING
1200 W
1050 W
2200 W
800 W (IEC 705)
2450 MHz
465 x 274 x 352 mm
290 x 200 x 290 mm
14.5kg
59 min. 99 sec.
MICROWAVE / GRILL / COMBINATION
10 – LEVELS
3
SPECIFICATIONS
¤ Door latch–When the door is closed it will auto-
matically 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 veg-
etable.
§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.
§øClock/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.
Metal Rack.
Coupler.
4
FEATURES DIAGRAM
3
3
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.
5
EARTHING INSTRUCTIONS
INSTALLA TION
WARNING : Improper use of the earthing plug can result in a risk of electric shock. consult a qualified electri-
cian 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.
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.
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.
1
2
3
4
5
6
7
Touch Power pad,
Once the touch
POWER
9
8
7
6
5
4
3
2
1
0
Power Level (Display)
P-HI
P-90
P-80
P-70
P-60
P-50
P-40
P-30
P-20
P-10
P- 0
Approximate Percentage
of Power
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
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.
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.
6
OPERATION PROCEDURE
When the oven door is opened, the light turns
off.
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.
Each time a pad is touched, a BEEP will sound
to acknowledge the touch.
The oven automatically cook on full power
unless set to a lower opwer level.
The display will show “ : 0” when the oven is
plugged in.
Time clock returns tol the present time when the
cooking time ends.
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.
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.
1
2
3
4
5
6
7
8
Make sure the oven is properly installed and
plugged into the electrical outlet.
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...
7
CONTROL
SETTING THE CLOCK
1. Touch CLOCK / A.START pad.
This is a 12 hour clock system.
CLOCK/
A.START
2. Touch CLOCK/A.START pad
once more.
This is a 24 hour clock system.
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
CLOCK/
A.START
3. Enter the correct time of day by
touching the numbers in
sequence.
The display will then begin blinking.
1 2 3 0
NOTE : This oven is multiple
clock system. If you
want 12 hour clock
system, can be omitted this step.
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.
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.
8
WEIGHT DEFROSTING
DO THIS THIS HAPPENS...
1. Touch AUTO DEFROST pad.
The WEIGHT DEFROST indicator
lights and “0” is displayed. And the
g indicator starts blinking.
AUTO
DEFROST
2. Touch number pads for the
defrosting weight
you want.
The display will show the numbers
you pressed in the order you
touched.
5 0 0
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.
START
NOTE : To prevent over defrosting thin areas or edges can be shielded with strips of aluminum foil.
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.
9
TIME DEFROSTING
DO THIS THIS HAPPENS...
1. Touch AUTO DEFROST pad.
The WEIGHT DEFROST indicator
lights and “0” is displayed. And the
g indicator starts blinking.
AUTO
DEFROST
2. Touch AUTO DEFROST pad
once more.
The TIME DEFROST indicator
lights and “ : 0” is displayed.
AUTO
DEFROST
3. Touch number pads for the
defrosting time you want.
The display will show the numbers
you pressed in the order you
touched.
2 7 1 0
NOTE : Your oven can be
programmed for 59 minutes
99 seconds. (59:99)
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.
START
NOTE : To prevent over defrosting, thin areas or edges can be shielded with strips of aluminum foil.
10
COOKING IN ONE STAGE
DO THIS... THIS HAPPENS...
1. Touch POWER pad.
The M/W indicator lights and
“P- ” is displayed.
POWER
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.
START
2. Touch the number pad for the
power level you want.
The display will show what you
touched. This example shows
power level 3.
3
NOTE: If steps 1 and 2 are
omitted, the oven will
cook at full power.
3. Touch number pads for the
cooking time.
The display will show the numbers
you pressed in the order you
touched.
3 05
NOTE: Your oven can be pro-
grammed for 59 minutes 99 seconds.
(59:99)
NOTE: Using lower power levels increase the cooking time which is recommended for foods such as cheese,
milk and slow cooking of meats.
11
GRILL COOKING
This function allows you to brown food quickly.
The heating element is located in the top of the oven.
There is no pre-heating the oven for grill cooking. Place food inside the oven when setting the controls.
DO THIS... THIS HAPPENS...
1. Touch GRILL pad.
The GRILL indicator lights and
“ :0” is displayed.
GRILL
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.
START
2. Touch number pads for the
cooking time.
The display will show the numbers
you pressed in the order you
touched.
This example shows 25 minutes.
2 5 0 0
NOTE: Time can be set up to
30 minutes.
12
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...
CATEGORY TOUCH PAD APPROXIMATE PERCENTAGE OF MICROWAVE POWER
1. Touch COMBI pad.
The COMBI indicator lights and
“ :0” is displayed.
Pressing this pad repeatedly
changes category as shown in the
chart below.
COMBI
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.
START
2. Touch number pads for the
cooking time.
The display will show the numbers
you pressed in the order you
touched.
This example shows 20 minutes.
:0
HI
LO
ONCE
TWICE
3 TIMES
50%
60%
40%
2 0 0 0
NOTE: Time can be set up to
59 minutes 99 seconds.
13
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...
1. Program the desired power level and cooking time.
2. Touch CLOCK/A.START pad.
The AUTO START indicator lights
and “ :0” is displayed.
CLOCK/
A.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.
START
3. Enter the desired start time by
pressing the number pads.
The display will show the numbers
you pressed in the order you
touched.
This example shows 11:30
1 1 3 0
NOTE: AUTO START can be used for time cooking, if clock is set. If the oven door is opened after program-
ming 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.
14
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...
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...
1. Touch CLOCK/A.START pad.
The programmed AUTO START
time will appear on the display for 3
seconds.
CLOCK/
A.START
1. Touch SPEEDY COOK pad.
When you touch SPEEDY COOK,
“ :30” is displayed.
After 1.5 seconds, the oven starts
reheating.
SPEEDY
COOK
15
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
PLATE)
DO THIS... THIS HAPPENS...
DO THIS... THIS HAPPENS...
1. Touch FROZEN PIZZA pad.
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.
FROZEN
PIZZA
1. Touch BEVERAGE pad.
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.
BEVERAGE
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.
16
DO THIS... THIS HAPPENS...DO THIS... THIS HAPPENS...
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...DO THIS... THIS HAPPENS...
1. Touch DINNER PLATE pad.
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.
DINNER
PLATE
NOTE: For best results, consult the cookbook.
1. Touch SOUP pad.
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.
SOUP
ƒNSOUP ƒN
¡ 250g: Touch SOUP once.
¡ 350g: Touch SOUP twice within 1.5 seconds.
NOTE: For best results, consult the cookbook.
17
DO THIS... THIS HAPPENS...
DO THIS... THIS HAPPENS...
1. Touch FRESH VEGETABLE
pad.
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.
FRESH
VEG-
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.
BAKED
POTAT O
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.
ƒNFRESH VEGETABLE ƒN
¡ 200g: Touch FRESH VEGETABLE once.
¡ 300g: Touch FRESH VEGETABLE twice within 1.5 seconds.
NOTE: For best results, consult the cookbook.
FEEDING BOTTLE
This key is for feeding bottle disinfection effect.
At first, detach the nipple from the bottle and pour the 30cc water into each bottle, arrange the bottle symmetrically
on the glass tray and operate.
DO THIS... THIS HAPPENS...
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.
18
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.
FEEDING
BOTTLE
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.
NOTE: Oven stops operating when door is opened.
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