Daewoo KOC-984T User manual

Service Manual
Microwave Oven
Model: KOC-984T
DAEWOO ELECTRONICS CO., LTD.
S/M No. : C972T0S002

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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 doorhinge.
(2) A broken doorviewing screen.
(3) A broken front panel, oven cavity.
(4) A loosened door lock.
(5) A broken doorlock.
The door gasket plate and ovencavity surface should be kept clean.
No grease, soil or spatter should be allowed to build up on these surfacesor inside the oven.
DO NOTATTEMPT TO OPERATE THIS APPLIANCE WITH THE DOOROPEN.
The microwave oven has concealed switches to make sure the poweris turned off when the door is opened.
Do not attempt to defeat them.
DO NOTATTEMPT TO SERVICE THIS APPLIANCE UNTIL YOU HAVE READ THIS SERVICE MANUAL.
2. FOR SAFE SERVICE PROCEDURES
1. If the oven is operative priorto 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 emissioncheck 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.
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 terminalin the plug which is marked with the
letter 'E', earth symbolor 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 mustbe connected to the terminalwhich is marked with the letter 'L'or coloured red.
IMPORTANT
This oven is designed for counter-top use only.
NOTE

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SPECIFICATIONS
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUTNOTICE.
MODELKOC-984T
POWERSUPPLY230V~50Hz
POWER CONSUMPTION
MICROWAVE1450W
GRILL1200W
CONVECTION1550W
PROGRAMCOOK1850W
COMBINATION2600W(Simultaneous)
MICROWAVEENERGYOUTPUT1000W(IEC705)
MICROWAVEFREQUENCY2450MHz
OUTSIDEDIMENSIONS(WXHXD)526 x 345 x 496 mm (20.7 x 13.6 x 19.5 in.)
CAVITYDIMENSIONS(WXHXD)335 x 250 x 339 mm (13.2 x 9.8 x 13.3 in.)
NETWEIGHTAPPROX. 21 Kg (46.3 lbs.)
TIMER 60 minutes
FUNCTION SELECTIONS MICROWAVE/GRILL/CONVECTION/COMBI
POWER SELECTIONS 10 LEVELS
CAVITY VOLUME 1.0 Cu.Ft.
MODEL KOC-982T/983T/984T/985T1S KOC-982T/983T/984T/985T2S
POWER SUPPLY 230V~50Hz 230V~50Hz
POWER CONSUMPTION
MICROWAVE 1450W 1450W
GRILL 1200W 1200W
CONVECTION 1550W 1550W
PROGRAM COOK 1850W 1850W
COMBINATION 2600W (Simultaneous) 1550W (Sequential)
MICROWAVEENERGYOUTPUT
MICROWAVE FREQUENCY 2450MHz 2450MHz
OUTSIDEDIMENSIONS(WXHXD)
CAVITYDIMENSIONS(WXHXD)
NETWEIGHT
TIMER 60 minutes
FUNCTION SELECTIONS MICROWAVE/GRILL/CONVECTION/COMBI
POWER SELECTIONS 10 LEVELS
CAVITY VOLUME 1.0 Cu.Ft.

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1. OUTER DIMENSION
KOC-972T
EXTERNAL VIEW KOC-984T

5
EXTERNAL VIEW
KOC-984T
1. Door seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage.
2. Door hook - When the door is closed, it will automatically shut. If the door is opened while the oven is operating,
the magnetron will immediately stop operating.
3.Door viewing screen - Allows viewing of food. The screen is designed so that light can pass through, but not the microwave.
4. Top heater - Turns on when convection, grill and combi cooking is selected.
5. Oven lamp - Automatically turns on during oven operating.
6. Safety interlock system
7. Control panel
8. Turntable tray - Rotates during cooking and ensure even distribution of Microwaves.
It can also be used as a cooking utensil.
9. Oven front plate
10. Rotating base - This fits over the shaft in the center of the ovens cavity floor.
This is to remain in the oven for all cooking. It should only be removed for cleaning.
11. Under heater
12. Metal rack
13. Convection outlet & Fan

6
INSTALLATION
1. Steady, flat location
This microwave oven should be set on a steady, flat surface.
This microwave oven is designed forcounter 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 resultif the oven is located close to a TV, radio, antenna or feeder and so on.
Position the oven as far from them aspossible.
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. Thismicrowave oven requires a current ofapproximately 13amperes, 230 Volts, 50 Hz.
Power supply cord is about 1.2 meters long.
The voltage used must be the same asspecified on this oven. Using a higher voltage may result in afire 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 cableof 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 iscolder 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 therisk of the electric shock bypro-
viding an escape wire for the electric current. This appliance is equipped with
acordhavinga earthing wire with a earthingplug. The plugmustbe plugged into an outletthat is properlyinstalledandearthed.
EARTHINGINSTRUCTIONS
Improper use of the earthing plug can result in a risk of electric shock.
Consult a qualified electrician orserviceman 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 ofthe extension cord should be equalto or greater than the electrical rating of the appliance,
or Do not use an extension cord.
WARNING

7
CONTROL PANEL
all information manually
put into the oven.
Stop/ClearButton-
Used topauseand clear
morethan1.3 sec, number
is scrolled up automatically.
this button(pad) is pressed for
time and weight.
Used toinput the cooking
Dial Knob-
Used to starttheselected
cooking cycle and to set
time.
Start/Clock Button-
(KOC-972T)
cooking cycle.
Used to starttheselected
Start Button-
increments.
cooking time in30 sec
Used to program quickly
Speedy Cook Button(pad)-
PROGRAM COOK
COMBI :COMBINATION
TEMP : CONVECTION
DEFROST : TIME or WEIGHT
PIE
DEFROST
cookingmode.
When blinking, the oven is
When blinking, the oven is
operating in "PROGRAM COOK"
operatingin "PIE"
When blinking, the oven is
operatingin "CONVECTION"
Used toselect the variable
Microwave Power Level-
microwave power level. If
cookingmode.
cookingmode.
cookingmode.
operating in "COMBI"
When blinking, the oven is
When blinking, the oven is
operatingin "GRILL"
When blinking, the oven is
operating in "MICROWAVE"
cookingmode.
cookingmode.
cooking function.
M/W : MICROWAVE
Used to select desired
Function Buttons(pads)-
scrolled up automatically.
1.3sec,number is
is pressed for more than
temperature. Ifthis button
Used to set desired
Temperature Button(pad)-
GRILL
mode.
When blinking, the ovenis
operating in "WEIGHT
DEFROST" cooking mode.
operating in "TIME
DEFROST" cooking mode.
When blinking, the ovenis
When blinking, the ovenis
operating in weght input
4.FISH FILLET
SPEEDY COOK
STOP/CLEAR
_
5.VEGETABLE
(START/CLOCK)
START
+
PROGRAM COOK
2.ROAST PORK
1.ROAST BEEF
3.ROAST CHICKEN
DEFROST
GRILL
M/W
PROGRAM
COOK PIE
MW GRILL
COMBI TEMP
PIE
KGTEMP
COOK
WEIGHT - TIMECOMBI
DEFROST

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DISASSEMBLY ANDASSEMBLY
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.
Youare asked to observethe following precautions carefully.
1. Alwaysremove the power plug from the outlet before servicing.
2. Use aninsulated 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 make sure it is earthed properly before
beginning repair work.
(2) Warning about the electriccharge in the high voltage capacitor.
For about 30 secondsafter the operation stopped and electric charge
remains in the high voltage capacitor.
When replacing or checking parts, shortbetween oven chassis and
the negative high terminal of the high voltage capacitor,
by using a properly insulated screwdriver to discharge.
4. When the15A fuseis blownout dueto the operation of the monitor switch;
replace primaryinterlock 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.
Service personnelshould removetheirwatcheswheneverworking close toorreplacing the magnetron.
CAUTION
When servicing the appliance,needa care oftouching orreplacing highpotentialparts because ofelectricalshock or
exposing microwave.These parts are as follows -HV Transformer,Magnetron,HV Capacitor,HV Diode.
WARNING

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DISASSEMBLY ANDASSEMBLY
1. To remove cabinet
(1) Remove four screws on cabinetback.
(2) Push the cabinet backward.
2. To remove guide wind assembly
(1) Remove two screws for earthingand for fixing to rear-plate.
(2) Remove the noise filter from theguide wind.
(3) Pull the fan from the motor shaft.
(4) Remove two screws which secure the motor shaded pole.
(5) Remove the motor shaded pole.
(6) Reverse the above steps for reassembly.

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DISASSEMBLY AND ASSEMBLY
3. To remove H.V.transformer
(1) Remove four screws which secure
the H.V.transformer to the base plate.
(2) Remove the H.V.transformer.
(3) Reverse the above steps for reassembly.
4. To remove high voltage capacitor
(1) Remove a screw which securethe grounding ring
terminal of the H.V. diode and the capacitor holder.
(2) Remove the H.V. diode from the capacitor holder.
(3) Reverse the above steps for reassembly.
High voltage circuitwiring