Daewoo KOC-1C0KB, KOC-1C0KBS, KOC-1C4KB Service Manual
Service Manual
Microwave Oven
Model: KOC-1C0KB
KOC-1C0KBS
KOC-1C4KB
S/M No. :
Feb. 2010
✔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).
1
PRECA UTIONS T O BE OBSERVED BEFORE AND
DURING SER VICING T O AVOID POSSIBLE
EXPOSURE T O EXCESSIVE MICROW AVE 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 if 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.
TABLE OF CONTENTS
1. SAFETY AND PRECAUTIONS ...................................................................................................................................2
2. SPECIFICATION ..........................................................................................................................................................3
3. INSTALLATION ...........................................................................................................................................................4
4. CONTROL PANEL ......................................................................................................................................................5
5. DISPLAY WINDOW .....................................................................................................................................................6
6. ACCESSORIES ...........................................................................................................................................................7
7. INTERLOCK MECHANISM AND ADJUSTMENT ....................................................................................................10
8. WIRING PROCEDURE ..............................................................................................................................................11
9. WIRING DIAGRAM ....................................................................................................................................................12
10. ELECTRICAL PARTS LIST ....................................................................................................................................13
11. DISASSEMBLY AND ASSEMBLY..........................................................................................................................14
12. COMPONENT TEST PROCEDURE .......................................................................................................................27
13. TROUBLE SHOOTING GUIDE ...............................................................................................................................30
14. PRINTED CIRCUIT BOARD ...................................................................................................................................36
2
1. SAFETY AND PRECA UTIONS
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 PR OCEDURES.
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.
(1) inform the manufacturer, importer or assembler,
(2) repair the unit at no cost to the owner,
(3) attempt to ascertain the cause of the excessive leakage,
(4) 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 immediately.
IMPORTANT
The wire in this mains lead coloured in accordance with the following code.
Green-and-yellow : Earth
Blue : Neutral
Brown : Live
As the colours of the wires in the mains 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.
3
2. SPECIFICATIONS
MODEL KOC-1C0KB / KOC-1C0KBS / KOC-1C4KB
POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH earthing
MICROWAVE 1450W
POWER GRILL 1250W
CONSUMPTION CONVECTION 2650W
COMBINATION 2750W, MAX 2900W
MICROWAVE ENERGY OUTPUT 800W (IEC705)
MICROWAVE FREQUENCY 2450MHz
OUTSIDE DIMENSIONS (W X H X D) 524X375X477mm(20.63X14.76X18.78in)
CAVITY DIMENSIONS (W X H X D) 400x233x365mm(15.75x9.17x14.37in)
NET WEIGHT Approx. 25kg(55.06 lbs)
FUNCTION SELECTIONS MICROWAVE/ GRILL/ CONVECTION/ COMBINATION
POWER SELECTIONS 10 LEVELS
CAVITY VOLUME 1.3 Cu.Ft (34ℓ)
* Specifications are subject to change without notice.
4
3. 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 15 amperes, 230V, 50Hz.
• Power supply cord is about 1.5 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.
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 wire with a
earthing plug. The plug must be plugged into an outlet that is properly installed and earthed.
EARTHING INSTR UCTIONS
WARNING
Improper use of the earthing plug can result in a risk of electric shock.
Consult a qualified electrician of 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 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, or
Do not use an extension cord.
5
4. CONTROL PANEL
1 Display
The display shows you some information such as
cooking time, menu, quantity and temperature and so
on.
2 Quick defrost( ) Button
You can defrost a 500 grams of food quickly and
easily.
3 Steam cleaning() Button
This function helps you to clean the inside of oven.
4 Deodorization( ) Button
The oven has a special function to blow off smells in
the oven.
5 Menu Dial Knob :
You can choose a cooking menu by turning the Menu
Dial knob.
6 Control Dial Knob () :
You can enter cooking time, quantity, weight, and
temperature by turning the Control Dial knob.
7 Selection() Button: You can confirm the contents
you entered by pressing the Selection button.
8 Start/Speedy Cook () Button:
- You can start cooking immediately by pressing the
Start button after entering cooking information such
as cooking time, power level and so on.
- You can start the Microwave cook at power level 10
quickly by pressing the Start button.
You can add 30 seconds to the cooking time up to 5
minutes each time the Start button is pressed.
9 Stop/Clear() Button:
It is used for stopping the oven operation or clearing
the display.
6
1 Display window
The display shows you some cooking information such
as cooking time, clock, temperature, quantity and so on.
2 Icons of cookware
: It means a Steam bowl. If lights in the display
, use a steam bowl for cooking.
(This is optional feature.)
: It means a Grill rack. If lights in the display ,
use a grill rack for cooking.
: It means a Metal tray. If lights in the display ,
use a metal tray for cooking.
3 Icons of operation guide
: It means the Control dial knob. If blinks, turn
the control dial knob.
: It means the Selection button. If blinks, press
the selection button.
: It means the Start button. If blinks, press the
start/speedy cook button.
4 Icons of voice guide function
: It means the Voice guide function. If the voice
guide function is activated, turns on in the
display.
(Refer to “Setting the volume level” on the page 9.)
5 Icons of cooking menu
: It means Quick defrost. lights in the display
during Quick defrosting.
: It means Steam cleaning. lights in the display
during Steam cleaning.
: It means Deodorization. lights in the display
during Deodorization.
: It means Convection cook. lights in the display
during Convection cooking.
: It means Grill cook. lights in the display during
Grill cooking.
: It means Combination cook. lights in the
display during Combination cooking.
: It means Microwave cook. lights in the display
during Microwave cooking.
: It means Auto defrost. lights in the display
during Auto defrosting.
: It means Auto cook. lights in the display during
Auto cook.
: It means Instant cook. lights in the display
during Instant cook.
: It means Fermentation. lights in the display
during Fermentation.
: It means Steam cook. lights in the display
during Steam cook. This is optional feature.
: It means Mexican cook. lights in the display
during Mexican cook. This is optional feature.
: It means Memory cook. lights in the display
during Memory cook.
: It means Preheating. lights in the display
during preheating in Convection cooking.
7
6. A CCESSORIES
This oven is equipped with several accessories. They can be used in various ways to facilitate cooking.
1 Metal Tray - Put food or proper cookware on the metal tray.
2 Grill Rack - Put the grill rack on the metal tray.
It should be always used with the metal tray for cooking.
3 Grill Tray - Put food or proper cookware on the grill tray
4 Rotisserie - It can be used in Auto cook menu 3
(Please, refer to the next page about using of rotisserie)
■ HOW TO USE THE ACCESSORIES OF COOKING
■ Metal Tray ■ Grill Rack ■ Grill Tray ■ Rotisserie
NOTE : Metal Tray is attached to the left cushion.
NOTE : Grill Tray is attached to the right cushion.
1
2
3
4
• Microwave cooking
• Auto defrosting
• Quick defrosting
• Fermentation
• Memory cooking
• Convection cooking
• Auto cook menu: 3, 5
• Instant cook menu: 1, 5
• Put the grill rack on the
metal tray.
• It should be always used
with the metal tray for
cooking.
• Auto cook menu: 1, 2, 4, 6
• Instant cook menu: 2, 3, 4
• Grill cooking • Auto cook menu: 3
Fork
Fixture
Bar
8
7. INTERLOCK MECHANISM AND ADJUSTMENT
■ HOW TO USE THE ACCESSORIES OF COOKING
1 Insert Chicken into rotisserie
2 Fix forks by turing the Fixture
3 Insert the right shaft of bar into the motor
4 Put the left shaft of bar on the holder of rotisserie.
5 Put the base bowl of steam bowl on the center of
bottom The base bowl of steam bowl is usually used to
catch any fat and/or grease dripping from food placed
directly on the grid or to cook food directly.
6 Start cooking by Auto cook menu 3
For detail operation, refer to the page 14.
4
5
3
NOTE:
• The wide glass(heat resistant) utensil can be used instead of the base bowl in autocook menu 3.
•
When you operate the oven at the first time, smoke and bad odor might come out from the oven. Then, it will be helpful to
operate the oven in Convection cook at 250˚C with no food for about 10 minutes.
•
The cooling fan could be operated for a few minutes after cooking for the safety. The display will show “Cool” and “0” or
“current time” in turns while the cooling fan is operated.
WARNING: • Rotisseri is not a toy. Keep it away from children
•
The oven and rotisseri are very hot after cooking.
•
Use a thick oven glove while you are handing food or accessories.
9
■Component parts of Steam bowl
■How to use Steam bowl
■Important Safety Instructions
Lid
Steam plate
Base bowl
Pour the required amount of
water into the base bowl.
(about 200~300ml)
Put the steam plate on the
base bowl. And put
ingredients on it not to
overlap each other.
Cover with the lid. Make
sure that the edge of lid is
adjusted to the base bowl's.
Put the steam bowl on the
bottom.
about
200~300ml
Tips : You can cook small items faster than larger ones. And
uniform sized food will be cooked more evenly.
WARNING: • The oven and steam bowl is very hot after cooking.
•
Use thick oven globes while you are handing food or
accessories.
• Do not use this Steam bowl with a different product or model.
• Do not attempt to operate the oven without water or food inside.
• Before you use the Steam bowl, pour about 200 ~ 300ml of water into base bowl.
If water is not enough in the base bowl, it could cause the oven to be damaged or fire to happen.
• Do use the Steam bowl only for its intended use as described in this manual.
This is not intended for laboratory or industrial use.
• Do not operate the oven if the Steam bowl is damaged.
• Do not use the Steam bowl without the lid or the base bowl.
• Make sure that you install the lid onto the base bowl so that it fits into the steam plate.
• Do not touch the oven and steam bowl not wearing oven gloves.
Because they get very hot after cooking, they can cause burns.
• Do not use outdoors.
• The eggs or the chestnuts would be exploded without the lid and the steam plate.
• Read and follow the specific precautions in the instruction of steam cooking guide.
■Care and Cleaning
• Do not use abrasive cleaning products or solvents.
• Clean the appliance with soapy water.
• Do not immerse the Steam bowl into the water for a long time.
• Do not place the Steam bowl nearby a hot gas or electric burner or in a extremely heated oven.
STEAM BOWL GUIDE (Optional)
10
7. INTERLOCK MECHANISM AND ADJUSTMENT
CONDITION : DOOR OPEN
RED/RED
RED/RED
BLACK/BLUE
WHITE/BLUE
WHITE
BLUE
YELLOW
BLUE
LEFT RIGHT
CONDITION : DOOR CLOSE
LEFT RIGHT
INTERLOCK
MONITOR
SWITCH
DOM
SWITCH
HOOK
PRIMARY
INTERLOCK
SWITCH
1 MW RELAY Black & White, Black & White Control M/W
2 HALOGEN HEATER RELAY White & Red, Black Control halogen heater(Side heater)
3 TOP HEATER RELAY White & Black, Black Control heater top
4 CONVECTION RELAY Blue, Blue Control heater back
5 SLOW ACTING RELAY Blue, Blue
6 D.O.M CONNECTOR Blue, Green(Middle), Blue
7 SUB RELAY
8 THERMISTER CONNECTOR White, White Temperature sensor
LOCATION
PART NAME WIRING COLOR FUNCTION
11
8. WIRING PROCEDURE
MAIN PCB
NO. 1 : Red
NO. 3 : White
NO. 5 : Black
NO. 7 : Blue
NO. 9 : Grey
Prevent the current of oven from rising rapidly in
Microwave Mode
D.O.M(DOOR OPEN MONITOR) helps the
MICOM checking the Interlocking system of DOOR
NO. 1 & 3 : Supply power to PCB
NO. 5 : Convection motor
NO. 7 : Blower-Motor
NO. 9 : Lamp
8 7 6
5
1
2
3
4
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