Daewoo KOC-8HAT7S, KOC-8HBF7S, KOC-8HBF7P24, KOC-8HAT7R, KOC-8HBF7S24 Service Manual

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Service Manual

Microwave Oven

Model: KOC-8HAT7S

KOC-8HAT7R

KOC-8HAF7R

KOC-8HBF7S(7S24)

KOC-8HBF7P24

S/M No. :

Jul. 2013

✔ 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).

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.

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

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

3-1 OUTER DIMENSION ...........................................................................................................................................4

3-2 FEATURE DIAGRAM .........................................................................................................................................5

4 INSTALLATION ............................................................................................................................................................6

5 CONTROL PANEL .......................................................................................................................................................7

6 DISASSEMBLY AND ASSEMBLY ..............................................................................................................................9

7 INTERLOCK MECHANISM AND ADJUSTMENT .....................................................................................................22

8 TROUBLE SHOOTING GUIDE ..................................................................................................................................23

9 MESUREMENT AND TEST .......................................................................................................................................28

9-1 MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................28

9-2 MICROWAVE RADIATION TEST ....................................................................................................................29

9-3 COMPONENT TEST PROCEDURE ................................................................................................................30

10 WIRING DIAGRAM ...................................................................................................................................................31

11 EXPLODED VIEW AND PARTS LIST .....................................................................................................................33

11-1 DOOR ASSEMBLY .........................................................................................................................................33

12-2 CONTROL PANEL ASSEMBLY .....................................................................................................................33

13-3 TOTAL ASSEMBLY ........................................................................................................................................33

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.

MODEL KOC-8HAT7S / 8HAT7R / 8HAF7R

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

MICROWAVE 1400W

GRILL 850W

CONVECTION 1850W

COMBINATION KOC-8HAT7S : 2500W, KOC-8HAT7R : 1850W

MICROWAVE 1400W

GRILL 2300W

CONVECTION 1850W

COMBINATION 1850W

FRYER 2300W

MICROWAVE ENERGY OUTPUT 900W (IEC 705)

MICROWAVE FREQUENCY 2450MHz

OUTSIDE DIMENSIONS (W X D X H) 501X492X319mm(19.7X19.4X12.6 in.)

CAVITY DIMENSIONS (W X D X H) 310X328X232mm(12.2X12.9X9.1 in.)

NET WEIGHT Approx. 18Kg (39.6 lbs.)

TIMER 60 minutes

FUNCTION SELECTIONS Microwave / Grill / Convection / Combination

POWER SELECTIONS 10 LEVELS

CAVITY VOLUME 0.83 Cu. Ft

* SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.

MODEL KOC-8HBF7S(7S24) / 8HBF7P24

POWER SUPPLY (KOC-8HBF7S(7S24)) 230V~, 50Hz

POWER SUPPLY (KOC-8HBF7P24) 220V~, 60Hz

MICROWAVE 1400 W

POWER GRILL 2300 W

CONSUMPTION CONVECTION 2300 W

COMBINATION 2500 W

MICROWAVE ENERGY OUTPUT 900W (IEC 705)

MICROWAVE FREQUENCY 2450MHz

OUTSIDE DIMENSIONS (W X D X H) 501X492X319mm(19.7X19.4X12.6 in.)

CAVITY DIMENSIONS (W X D X H) 310X328X232mm(12.2X12.9X9.1 in.)

NET WEIGHT Approx. 18Kg (39.6 lbs.)

TIMER 60 minutes

FUNCTION SELECTIONS Microwave / Grill / Convection / Combination

POWER SELECTIONS 10 LEVELS

CAVITY VOLUME 0.83 Cu. Ft

* SPECIFICATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.

2. SPECIFICATIONS

POWER

CONSUMPTION

(KOC-8HAT7S / 8HAT7R)

POWER

CONSUMPTION

(KOC-8HAF7R)

3. EXTERNAL VIEW

319

501 492

1. OUTER DIMENSION (KOC-8HAT7S/8HAT7R/ 8HAF7R))

319

501 492

2. OUTER DIMENSION (KOC-8HBF7S(7S24) / 8HBF7P24)

r12e 4w 56

39q08

11. DOOR HOOK

When the door is closed, it will automatically lock shut. If door is opened while oven is operating, the magnetron will immediately stop operating.

12. DOOR VIEWING SCREEN

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

13. METAL RACK

14. TOP HEATER

Turns on when convection, grill and combi cooking is selected.

15. OVEN LAMP

Automatically turns on during oven operating.

16. SAFETY INTERLOCK SYSTEM

17. CONTROL PANEL

18. Glass Turntable

Turntable Center the tray on the roller guide when using the microwave features. Place food or microwave-safe cookware directly on the glass turntable.

* NOTE : Glass Turntable is atteched to the right

cushion.

19. Metal Tray

Put food or appropriate cookware directly on the metal tray and place on the glass turntable and then place on the roller guide when using convection cooking, combination cooking, auto cooking or grill cooking.

10. ROLLER GUIDE

This must always be used for cooking together with the turntable tray.

11. COUPLER

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

12. CONVECTION OUTLET & FAN

13. OVEN FRONT PLATE

14. DOOR SEAL

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

15. Home Fryer Bowl

Center the kit on the metal tray when using the Home fryer cooking.

2. FEATURE DIAGRAM

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. KOC-8HAT7S / KOC-8HAT7R / KOC-8HAF7R / KOC-8HBF7S(7S24) microwave oven requires a current of approximately 11 amperes, 230V, 50Hz. KOC-8HBF7P24 microwave oven requires a current of approximately 11 amperes, 220V, 60Hz.

• Power supply cord is about 1.2 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.

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 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.

EARTHING INSTRUCTIONS

4. INSTALLATION

Display : Cooking time, power level, indicators and

present time are displayed. M/W : When blinking, the oven is operating in MICROWAVE COOK. Grill : When blinking, the oven is operating in GRILL. Combi : When blinking, the oven is operating in COMBI. Convection : When blinking, the oven is operating in CONVECTION. Defrost : When blinking, the oven is operating in AUTO DEFROST. Auto Cook : When blinking, the oven is operating AUTO COOK. Deodorization : When blingking, the oven is operating DEODORIZATION. g : When blinking, the oven is operating in weight input mode.

Auto cook : Used to select Auto cook.

Steam Cleaning : Show steam cleaning in progress.

Dial knob : Used to set time, weight and quantity.

M/W : Used to set power level of microwave.

Combi : Used to select combi.

Convection : Used to select convection and selected

temp.

Grill : Used to select grill.

Auto Defrost : Used to defrost foods for weight or time.

Deodorization : Used to deodorize oven.

START/Speedy Cook : Used to start a programmed,

also for speedy start(each press adds 30 seconds microwave cooking time).

STOP/Clear : Used to stop the oven operation or to

delete the cooking data.

( KOC-8HAT7S / KOC-8HAT7R )

5-1. CONTROL PANEL

( KOC-8HBF7S(7S24) / KOC-8HBF7P24 / KOC-8HAF7R)

Display : Cooking time, power level and indicators are

displayed.

M/W : When blinking, the oven is operating in MICROWAVE COOK. Grill : When blinking, the oven is operating in GRILL. Combi : When blinking, the oven is operating in COMBI. Convection : When blinking, the oven is operating in

CONVECTION.

Defrost : When blinking, the oven is operating in AUTO

DEFROST.

Auto Cook : When blinking, the oven is operating AUTO

COOK and HOME FRYER COOK.

Deodorization : When blingking, the oven is operating

DEODORIZATION.

Steam Cleaning : When blinking, the oven is operatng STEAM

CLEANING.

g : When blinking, the oven is operating in weight input mode.

Home fryer : Used to select Home fryer.

Auto cook : Used to select Auto cook

Dial knob : Used to set time, weight and quantity.

M/W : Used to set power level of microwave.

Combi : Used to select combi.

Convection : Used to select convection and selected

temperature.

Grill : Used to select grill.

Defrost : Used to defrost foods for weight or time.

Deodor. / Steam cleaning : Used to deodorize oven or to

clean oven.

START/+30sec : Used to start a programmed, also for speedy

start(each press adds 30 seconds microwave cooking time).

STOP/Clear : Used to stop the oven operation or to delete the

cooking data.

5-2. CONTROL PANEL

- Cautions to be observed when trouble shooting.

Unlike many other appliances, the microwave 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. Always remove the power plug from the outlet before servicing.

2. Use an insulated screwdriver and ware rubber gloves when 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 microwave oven is designed to be used with earthed. It is imperative, therefore, to makes 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 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 15A 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.

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

WARNING : When servicing the 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.

6. DISASSEMBLY AND ASSEMBLY

1. To remove cabinet

1) Remove four screws on the cabinet back.

2) Push the cabinet backward.

2. To remove door assembly

1) Remove two screws which secure the stopper hinge top.

2) Remove the door assembly from top plate of cavity.

3) Reverse the above for reassembly.

NOTE : After replacing the door assembly, perform a

check of correct alignment with the hinge and cavity front plate.

A12A05

A04 A03

A01

A11

A09

A06

A02

A07 A08

A10

3-1. To remove door parts. (KOC-8HAT7S / KOC-8HAT7R / KOC-8HAF7R)

(1) Remove the gasket door from door plate. (2) Remove screws from door plate. (3) Remove the door frame from door plate. (4) Remove screws from door frame. (5) Remove the handle from door frame. (6) Remove the stopper hinge top from door plate. (7) Remove the spring and the hook. (8) Remove screws from supporter braket glass. (9) Remove barrier screen outer from door frame. (10) Reverse the above steps for reassembly.

A00 3511726630 DOOR AS KOC-8HATKS 1 A01 3517004400 BARRIER SCREEN *I TEMP GLASS T2.0 1 A02 3511708900 DOOR PAINTING AS KOC-871C0S 1 A03 3513101310 HOOK POM 1 A04 3515101310 SPRING HOOK HSW-3 1 A05 3512209950 FRAME DOOR ABS XR-401 1 A06 3517009550 BARRIER SCREEN *O

TEMP GLASS T3.2 KOC-8H9TWS

1 A07 3515309300 SUPPORTER BRACKET GLASS T0.8 1 A08 7S312X40A1 SCREW TAPPING T1 TRS 4X10 SE MFZN 2 A09 3512606710 HANDLE DOOR ABS SG-0760D, SG-175 1 A10 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 2 A11 3512301300 GASKET DOOR PBT 1 A12 3515203600 STOPPER HINGE *T AS KOC-970T1S 1

REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK

C07C05

C13

C14

C08

C09

C10

C02

C06

C03 C04

C11

C01

C12

3-2. To remove door parts. (KOC-8HBF7S(7S24) / 8HBF7P24)

C00 3511726640 DOOR AS KOC-8HBTKC 1 C01 3511622600 DECORATOR HANDLE ABS SG-175 SG-0760D 1 C02 3517009570 BARRIER-SCREEN * O SEAL AS KOC-8HBTKC SILICON 1 C03 3515309300 SUPPORTER BRACKET GLASS T0.8 1 C04 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 2 C05 3512209950 FRAME DOOR ABS XR-401 1 C06 3511708900 DOOR PAINTING AS KOC-871C0S 1 C07 3515203600 STOPPER HINGE *T AS KOC-970T1S 1 C08 3517004400 BARRIER SCREEN * I TEMP GLASS T2.0 1 C09 3512301300 GASKET DOOR PBT 1 C10 3512606960 HANDLE DOOR

ABS SG-0760D SG-175 COATING

1 C11 7121401613 SCREW TAPPING T2S TRS 4X16 MFZN 1 C12 7125401211 SCREW TAPPING T2S FLT 4X12 MFZN 1 C13 3515101310 SPRING HOOK HSW-3 1 C14 3513101310 HOOK POM 1

REF. NO PART CODE PART NAME DESCRIPTION Q'TY REMARK

+ 29 hidden pages

Daewoo KOC-8HAT7S, KOC-8HBF7S, KOC-8HBF7P24, KOC-8HAT7R, KOC-8HBF7S24 Service Manual

Specifications and Main Features

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