Daewoo KOR-86B50S, KOR-63B50S Service Manual

S/M No. : R63B50S001

Service Manual

Microwave Oven

Model: KOR-63B50S KOR-86B50S

DAEWOO ELECTRONICS CO., LTD.

http://svc.dwe.co.kr

PRECAUTIONS TO BE OBSERVED BEFORE AND DURING SERVICING TO AVOID POSSIBLE EXPOSURE TO EXCESSI VE MICR OWAV E 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.

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.

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SAFETY AND PRECAUTIONS ........................................................................................................ 2

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

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

SPECIFIC ATIONS ... ............ ......... ............ ............ ......... ............ ......... ........... ............ ......... .............. 3

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

1. OUTER DIMENSION .................................................................................................................... 4

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

INSTALLATIO N . ...... ...... ... ...... ... ...... ...... ... ...... ...... ... ...... ... ...... ...... ... ..... ...... ... ...... ...... ... ...... .............. 5

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

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

INTERLOCK MECHANISM AND ADJUSTMENT ........................................................................... 13

TROUBLE SHOOTING GUIDE ........................................................................................................ 14

MEASUREMENT AND TEST ...................................................................................... ......... ......... ... 1 6

1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ..................................................... 16

2. MICROWAVE RADIATION TEST ................................................................................................ 17

3. COMPONENT TEST PROCEDURE ............................................................................................ 18

WIRING DIAGRAM .......................................................................................................................... 19

EXPLODED VIEW AND PARTS LIST ............................................................................................. 20

1. DOOR ASSEMBLY ...................................................................................................................... 20

2. CONTROL PANEL ASSEMBLY.................................................................................................... 20

3. TOTAL ASSEMBLY ...................................................................................................................... 20

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SAFETY AND PREC AUTIONS

1. FOR SAFE OPERATION

Dam age that allows the microwave energy (that cooks or heats the food) to escape will res u lt in poor cooking and m ay cause serious bodily injury to the operator. IF ANY OF THE FOLLO W ING CONDITIONS EXIST, OPERATOR MUST NOT USE THE APPLIANCE. (Only a trained service personnel should m ake 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 APPLIANC E UNTIL YO U HAVE READ THIS SERVICE M ANUAL.

2. FOR SAFE SERVICE PROCEDURES

1) If the oven is operative prior to servicing, a microwave em ission check should be performed prior to servicing the oven.

2) If any certified oven unit is found to servicing, a m icrowave 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 im m ediately.

IMPORTANT

The wire in this mains lead coloured in accordance w ith the following code. Green-and-yellow : Earth

Blue : Neutral Brown : Live

As the colours of the wires in the m anins lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows. The wire w hich is coloured green-and-yellow must be connected to the termianl in the plug w hich is marked with the l etter ‘E’, earth symbol or coloured green-and-yellow. The wire w hich is coloured blue must be connected to the terminal which is marked with the letter ‘N’ or coloured black. The wire w hich is coloured brown must be connected to the terminal which is m arked with the letter ‘L’ or coloured red.

NOTE

This oven is designed for counter-top use only.

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SPECIFICATIONS

MOD E L KOR-63B5 KOR -86B5

POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH EARTHING

POWER CONSUMPTION

MICRO WAVE ENER G Y OU TPUT 800W 900W

MICRO WAVE FREQ UEN CY 2450MHz

OUTSIDE DIMEN SIONS (W X H X D) 465 x 279 x 354 m m

CAVITY DIMENSIONS (W X H X D) 290 x 220 x 306 mm

NET W E IGHT APPRO X . 13 Kg ( 28.7 lbs.) APPRO X. 15 Kg ( 33.1 lbs.)

TIMER 35 min. DUAL SPEED

FUNCTION SELECTIONS MICROWAVE

POWER SELECTIO NS 5 LEVELS

MICRO WAVE 1200W 1350W

GRILL

COMBINATION

495 x 294 x 384 mm

(18.3 x 11.0 x 13.9 in.)

(11.4 x 8.7 x 12.0 in.)

(19.5 x 11.6 x 15.1 in.)

320 x 244 x 338 mm

(12.6 x 9.6 x 13.3 in.)

CAVITY VOLU M E 0.7 Cu.Ft. 0.9 Cu. Ft.

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SPECIFICATIONS ARE SUBJECT TO CHANGE W ITHOUT NOTICE.

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EXTERNAL VIEW

1. OUTER DIMENSION(KOR-63B5/KOR-8 6B5)

2. FEATURE DIAGRAM

1. Safety interlock system

2. Door viewing screen -

3. Door hook -

will imm e diat ely s to p o per at in g.

4. Oven cavity

5. Door seal -

6. Glass co oking tray -

7. Roller guide -

8. Co u p le r -

9. K nob V.P.C -

10. Knob tim er -

11. Door release button -

W hen the door is closed, it will automatically shut. If the door is opened while the oven is operating, the magnetron

Door seal m aintains the microwave energy within the oven cavity and prevents microw ave leakage.

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

This m ust always be used for cooking together w ith the glass cooking tray.

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

Used to select a m icrowave power level.

Used in setting cooking time for all functions.

By pushing this button the latch system cut off all circuits and stops the oven before the door is opened.

Allows viewing of food. The screen is designed so that light can pass through, but not the microw ave.

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IN STAL LATION

1. Steady, flat locatio n

This microw ave oven should be set on a steady, flat surface. This microw ave 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 w hen choosing a place to position it, or the insulation might be adversely affected and breakdowns occur.

5. Power supply

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Check your local pow er source.

This m icrowave oven requires a current of approxim ately 6 am peres, 230 Volts, 50 Hz.

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Power supply cord is about 0.8 meters long.

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The voltage used must be the sam e as specified on this oven. Using a higher voltage may result in a fire or other accident

causing oven damage. Using low voltage w ill cause slow cooking. W e are not responsible for dam age resulting from use of this oven with a voltage of ampere fuse other than those specified.

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This appliance is supplied w ith cable of special type, w hich, if dam aged, must be repaired w ith cable of same type.

Such a cable can be purchased from D AE WO O and m ust be installed by a Qualified Person.

6. Examine the oven after unpacking for any dam age such as:

A m isaligned door, broken door or a dent in cavity. If any of the above are visible, DO NOT INSTALL, and notify dealer im mediately.

7. Do n o t o pe rate th e o v e n if it is c old e r th an roo m temp e r a tu r e

(This m ay occur during delivery in cold w eather.) Allow the oven to becom e 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 appliance is equipped with a cord having a earthing wire with a earthing plug. The plug m ust be plugged into an outlet that is properly installed and earthed.

WARNIN G

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 com pletely 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 ac c ep t th e p lug o n 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 F U NCTIONS

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 m ust 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 recomm ended power levels.

5. Determine cooking tim e. Consult cookbook for recipe tim ing.

Oven light turns on and cooling fan starts to operate. Microw ave cooking starts.

6. You may open the door w hile the oven is operating.

As soon as the door is opened, the safety m echanism stop the generation of m icrowave power and the operation of cooking tim er. If you wish to change the time during cooking, sim ply adjust the timer to the desired tim e.

7. Whe n the t imer re a c h e s z e r o , a b e ll will rin g a n d th e u nit will

turn o ff. O v en lig h t tu rn s off. If a d d itional cooking time is needed and the doo r is c lo s ed , the ov e n will au to ma tic a lly s ta rt when the timer is reset.

NOTE

1. When setting timer for less than 2 minutes, turn the

2. Various clicking noises m ay be heard when turning

tim er past 2 minutes and then return to the correct tim e r s e ttin g .

V.P.C knob. T his is normal and does not affect the operation of your m icrow ave oven.

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

Va ria b le po we r c o o k in g

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On and OF F cycle time of me chanical V.P.C switch is 30 seconds.

W hen the V.P.C knob is set to the desired position and timer knob turns to the desired position, the V.P.C sw itch has a cycle (ON/OFF time(sec.)) listed below.

Variable power setting

Power level

KOR-63B 5 / KOR-86B5

HIGH 30/0 100 %

M E D HIGH 23 .2 /6 .8 77 %

MED IUM 16.5/13.5 55 %

D E F R OST 9.8/2 0 .2 33 %

WARM 5/25 17 %

Symbol

ON/OFF time (sec.)

Approximate Percentage

of Power

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DISASSEMBLY AND ASSEM B LY

Cautions to be observed when trouble shooting

Unlike many other appliances, the microw ave oven is high-voltage, high-current equipment. It is completely safe 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. Alw ays remove the pow er plug from the outlet before servicing.

2. Use an insulated screwdriver and wear rubber gloves w hen servicing the high voltage side.

3. Discharge 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 microw ave oven is designed to be used while earthed. It is im perative, therefore, to make sure it is earthed properly before beginning repair work.

2) Warning about the electric charge in the high voltage capacitor. For about 30 seconds after the operation hasstopped an electric charge rem ains 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 due to the operation of the monitor switch; replace primary interlock switch, secondary interlock switch and interlock m onitor switch.

5. After repair or replacem ent of parts, make sure that the screws are

properly tightened, and all electrical connections are tightened.

6. Do not operate without cabinet.

CAUTION

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

WARNING

W hen servicing the appliance, take a care w hen touching or replacing high potential parts because of electrical shock or exposing microwave. These parts are as follows - HV Transformer, Magnetron, HV C apacitor, H V D iode. HV Fuse.

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