Daewoo KOC-1C0K5SV1 User manual

Service Manual
Microwave Oven
Model: KOC-1C0K5SV1
S/M No. :
Nov. 2011
✔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
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 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 ......................................................................................................8
8. WIRING PROCEDURE ................................................................................................................................................9
9. WIRING DIAGRAM ....................................................................................................................................................10
10. ELECTRICAL PARTS LIST ....................................................................................................................................11
11. DISASSEMBLY AND ASSEMBLY..........................................................................................................................12
12. COMPONENT TEST PROCEDURE .......................................................................................................................25
13. TROUBLE SHOOTING GUIDE ...............................................................................................................................28
14. PRINTED CIRCUIT BOARD ...................................................................................................................................34

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1. 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 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’ or by earth symbol or 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.

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2. SPECIFICATIONS
MODEL KOC-1C0K5SV1
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 INSTRUCTIONS
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.

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4. CONTROL PANEL
1Display
The display shows you some information such as
cooking time, menu, quantity and temperature and so
on.
2Quick defrost( ) Button
You can defrost a 500 grams of food quickly and
easily.
3Steam cleaning()Button
This function helps you to clean the inside of oven.
4Deodorization( ) Button
The oven has a special function to blow off smells in
the oven.
5Menu Dial Knob :
You can choose a cooking menu by turning the Menu
Dial knob.
6Control Dial Knob ():
You can enter cooking time, quantity, weight, and
temperature by turning the Control Dial knob.
7Selection()Button: You can confirm the contents
you entered by pressing the Selection button.
8Start/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.
9Stop/Clear()Button:
It is used for stopping the oven operation or clearing
the display.

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5. DISPLAY WINDOW
1Display window
The display shows you some cooking information such
as cooking time, clock, temperature, quantity and so on.
2Icons of cookware
: 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.
3Icons 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.
4Icons 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.)
5Icons 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 Memory cook. lights in the display
during Memory cook.
: It means Preheating. lights in the display
during preheating in Convection cooking.

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6. ACCESSORIES
This oven is equipped with several accessories. They can be used in various ways to facilitate cooking.
1Metal Tray - Put food or proper cookware on the metal tray.
2Grill Rack - Put the grill rack on the metal tray.
It should be always used with the metal tray for
cooking.
■HOW TO USE THE ACCESSORIES OF COOKING
■Metal Tray ■Grill Rack
NOTE : Metal Tray is attached to the left cushion.
• 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
1
2

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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

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1MW RELAY Black & White, Black & White Control M/W
2HALOGEN HEATER RELAY White & Red, Black Control halogen heater(Side heater)
3TOP HEATER RELAY White & Black, Black Control heater top
4CONVECTION RELAY Blue, Blue Control heater back
5SLOW ACTING RELAY Blue, Blue
6D.O.M CONNECTOR Blue, Green(Middle), Blue
7SUB RELAY
8THERMISTER CONNECTOR White, White Temperature sensor
LOCATION
PART NAME WIRING COLOR FUNCTION
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