Daewoo KOR-63350S, KOR-6335, KOR-86350S Service Manual

S/M No. : R63350S001

Service Manual

Microwave Oven

MODEL :

KOR-63350S
KOR-86350S

D AEW OO ELECTR ONICS CO., LTD

http : //svc.dwe .co.kr

MAR. 2000

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

1. FOR SAFE OPERATION ............................................................................................................. 2

2. FOR SAFE SERVICE PROCEDURES ........................................................................................ 2

SPECIFICATIONS ............................................................................................................................ 3

EXTERNAL VIEW ............................................................................................................................ 4

1. OUTER DIMENSION(KOR-6335/KOR-8635) .............................................................................. 4

2. FEATURE DIAGRAM ................................................................................................................... 4

INSTALLATION ................................................................................................................................ 5

OPERATIONS AND FUNCTIONS ................................................................................................... 6

DISASSEMBLY AND ASSEMBLY .................................................................................................. 7

INTERLOCK MECHANISM AND ADJUSTMENT ........................................................................... 17

TROUBLE SHOOTING GUIDE ........................................................................................................ 18

MEASUREMENT AND TEST ........................................................................................................... 20

1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ..................................................... 20

2. MICROWAVE RADIATION TEST ................................................................................................ 21

3. COMPONENT TEST PROCEDURE ............................................................................................ 22

WIRING DIAGRAM .......................................................................................................................... 23

EXPLODED VIEW AND PARTS LIST ............................................................................................. 24

1. DOOR ASSEMBLY ...................................................................................................................... 24

2. CONTROL PANEL ASSEMBLY ................................................................................................... 24

3. TOTAL ASSEMBLY ...................................................................................................................... 24

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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 surface should be kept clean.
No greas,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 micrwave oven has concealead 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 manafacterer immediately.

IMPORTANT

The wire in this mains lead coloured in accordance with the following code.
Green-and-yellow : Earth
Blue : Neartral
Brown. : live
As the colours of the wires in the manins lead of this appliance may not correspond with the coloured makings 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 terminals 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

The oven is desigend for counter-top use only.

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SPECIFICATIONS

MODEL KOR-6335 KOR-8635
POWER SUPPLY 230V ~ 50Hz, SINGLE PHASE WITH EARTHING
POWER

CONSUMPTION

MICROWAVE ENERGY OUTPUT 800W 900W
MICROWAVE FREQUENCY 2450MHz
OUTSIDE DIMENSIONS(W X H X D) 465 x 279 x 365 mm

MICROWAVE 1200W 1350W
GRILL
COMBINATION

495 x 294 x 392 mm

(18.3 x 11.0 x 14.4 in.)

(19.5 x 11.6 x 15.4 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. 13Kg(28.7 lbs.) APPROX. 15Kg(33.1 lbs.)
TIMER 35min. DUAL SPEED
FUNCTION SELECTIONS MICROWAVE
POWER SELECTIONS 5 LEVELS
CAVITY VOLUME 0.7 Cu.Ft. 0.9 Cu.Ft.

320 x 244 x 338 mm
(12.6 x 9.6 x 13.3 in)

* SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.

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EXTERNAL VIEW

1. OUTER DIMENSION(KOR-6335/KOR-8635)

2. FEATURE DIAGRAM

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1. Safety interlock system

2. Door viewing screen - Allows viewing of food. The screen is designed so that light can pass through, but not the microwave.

3. Door hook - When the door is closed, it will automatically shut. If the door is opened while the oven operating, the magnetron

will immediately stop operating.

4. Oven cavity

5. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.

6. Glass cooking tray - Made of special heat resistant glass. Food in a proper receptacle is placed on this tray for cooking.

7. Roller guide - This must always be used for cooking together with the glass cooking tray.

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

9. Knob V.P.C - Used to select a microwave power level.

10. Knob timer - Used in setting cooking time for all functions.

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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 oven 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, 230Volts, 50Hz.
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 amprer fuse other than those specified.
This appliance is supplied with cable of special type, which, if samaged, 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 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 applicance 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.

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 plug, and a
3-slot receptacle that will accpt 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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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. Choose cooking power level by setting V.P.C knob to
the desired position. Refer to cookbook for recomended
power levels.

5. Determine cooking time.
Consult cookbook for recipe timing.
Oven light turns on and cooling fan starts to operate.
Microwave cooking starts.

6. You may open the door while the oven is operating.
As soon as the door is opened, the safety mechanisms
stop the generation of microwave power and the operation
of cooking timer.
If you wish to change the time during cooking, simply adujst
the timer to the desired time.

7. When the timer reaches zero, a bell will ring and the unit will
turn off.
Oven light turns off. If additional cooking time is needed and the door is closed, the oven will automatically start when the
timer is reset.

NOTE

1. When setting timer for less than 2 minutes, turn the
timer pass 2 minutes and then return to the correct
timer setting.

2. Various clicking noises may be heard when turning
V.P.C knob. This is normal and does not affect the
operation of your microwave oven.

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

Variable power cooking

On and OFF cycle time of mechanical V.P.C switch is 30 seconds.
When the V.P.C knob is set to the desired position and timer knob turns to the desired position, the V.P.C switch has a cycle
(ON/OFF time(sec.)) listed below.

Variable power setting

POWER LEVEL

HIGH MAX MAX 30/0 100 %

MED-HIGH 610W 690W 23.2/6.8 77 %

MEDIUM 440W 490W 16.5/13.5 55 %

DEFROST 260W 290W 9.8/20.2 33 %

WARM 130W 150W 5/25 17 %

KOR-6335 KOR-8635

**

Symbol

**

ON/OFF time (sec.)

Approximate Percentage

of power

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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 safety 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 scredriver and ware rubber gloves when servicing the high voltage side.

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

(1) Check the earthed.

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 grounded 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.

SHORT

CAUTION

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

WARNING

When servicing th 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, HVFuse.

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