Daewoo KOG-8465 User manual

Service Manual
Microwave Oven
KOG-8465
DAEWOO ELECTRONICS CO., LTD.
Power
Timer 0
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
✔ 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).

2
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 microwave power 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
PROPER USE AND SERVICE PRECAUTIONS 3
SPECIFICATIONS 5
EXTERNAL VIEWS 5
NAMES AND FUNCTION OF PARTS 6
CONTROL PANEL 7
HOW TO SET THE OVEN CONTROLS 8
INTERLOCK MECHANISM FUNCTIONS AND ADJUSTMENTS 11
PRECAUTIONS FOR DISASSEMBLY AND REPAIR 13
DISASSEMBLY AND ASSEMBLY 14
TROUBLE SHOOTING GUIDE 21
MEASUREMENT 25
COMPONENT TEST PROCEDURE 27
WIRING DIAGRAM 28
SCHEMATIC DIAGRAM 29
WIRING DIAGRAM(GERMANY) 31
SCHEMATIC DIAGRAM(GERMANY) 32
EXPLODED VIEW 34

PROPER USE AND SERVICE PRECAUTIONS
CAUTION : This Device is to be Serviced Only by Properly Qualified Service Personnel. Consult the Service
Manual for Proper Service Procedures to Assure Continued Safety Operation and for Precautions
to be Taken to Avoid Possible Exposure to Excessive Microwave Energy.
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 must 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. Correct Installation
1) This microwave oven weighs 18 kg(40lbs.) and must be placed on a horizontal base strong enough to support
this weight.
2) The oven should be placed as far from high temperature source and vapour as possible.
3) The power supply cord is about 1.6m (5.25ft) long. Earthing is required when connecting the power source.
4) Power consumption of this oven is approximately 2.8 kw. It is suggested that the unit is operated on such power
line(about 12 amperes) that can provide more power than this rating.
5) Object must not be placed on the top enclosure so as not to obstruct air flow for ventilation.
3
CAUTION
MICROWAVE RADIATION
PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE
FROM THE MAGNETRON OR OTHER MICROWAVE GENERATING DEVICE IF IT IS IMPROPERLY
USED OR CONNECTED. ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS, WAVEGUIDE,
FLANGES AND GASKETS MUST BE SECURE. NEVER OPERATE THE DEVICE WITHOUT A
MICROWAVE ENERGY ABSORBING LOAD ATTACHED. NEVER LOOK INTO AN OPEN WAVEGUIDE
OR ANTENNA WHILE THE DEVICE IS ENERGIZED

4
IMPORTANT
The wires 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.

SPECIFICATIONS
EXTERNAL VIEWS
Power Supply 230V~, 50Hz 240V~, 50Hz(U.K)
Power Consumption 1,450 W 1,500W
Microwave Output Power 900W (IEC 705) 900W (IEC 705)
Frequency 2,450 MHz 2,450 MHz
Grill power consumption 1,400 W 1,500W
Simultaneous Heating Power Consumption 2,800 W 2,950 W
Outside Dimensions (W X H X D) 501 X 319 X 389 mm (19.7 X 12.6 X 15.3 in.)
Cavity Dimensions (W X H X D) 310 X 229 X 330 mm (12.2 X 9.0X 13.0 in.)
Net Weight Approx. 18 kg (40 Ibs.)
Timer 60 min. Dual
Select Function Microwave/Grill/Simultaneous Heating
Microwave Power Level High/Med High/Med/Defrost/Low
(900W) (725W) (520W) (310W) (165W)
Simultaneous heating Level 3-Levles( Grill+M/W 3-Power levels)
* Specifications subject to change without notice.
5

6
NAMES AND FUNCTION OF PARTS
¤DOOR SEAL
Door seal maintains the microwave within the
oven cavity and prevents microwave leakage.
¤ŁDOOR HOOK
When door is closed, it will autoamtically lock shut.
If door is opened while oven is operating,
magnetron tube will immediately stop operating.
¤ØDOOR SCREEN
Allows viewing of food. Microwave cannot pass
through perforations in screen.
¤ŒGRILL HEATER
Turns on when grill and simultaneous cooking is
selected.
¤ºOVEN LAMP
Automatically turns on during oven operating.
¤SAFETY INTERLOCK SYSTEM
¤CONTROL PANEL
¤GLASS TURN -TABLE TRAY
Rotates during cooking and ensure even
distribution of Microwaves. It can also be used as
a cooking utensil.
¤OVEN FRONT PLATE
¤ROLLER GUIDE
This must be always used for cooking together
with the glass turn-table tray. Use a mild
detergent, water and a soft cloth to clean the
roller guide.
¤æCOUPLER
This fits over the shaft in the center of the oven’s
cavity floor.
This is to remain in the oven for all cooking.

7
CONTROL PANEL
Power
Timer 0
1
2
3
4
5
6
7
8
9
10
20
30
40
50
60
POWER OR FUNCTION SELECT KNOB
- Used to select a microwave power level in M/W,
GRILL or SIMUL. cooking.
- Used to select a function before the cooking.
1) M/W oven-used to heat food with
microwave.
2) GRILL-Used to browning food with grill
heater.
3) SIMUL. - used to simultaneous cooking with
microwave and grill heater.
TIMER KNOB
- Used in setting cooking time for all functions.
NOTE :
When setting TIMER for less than 1
minute, turn the TIMER past 1 minute
and then return to correct timing.

8
HOW TO SET THE OVEN CONTROLS
1. MICROWAVE DEFROST
• This oven has 5-power levels in microwave cooking.
• You can select these levels by POWER knob.
1. place food inside oven.
2. Set POWER knob to appropriate M/W power level position.
3. Set TIMER knob to the cooking time.
NOTE : ¡Be sure to read the cookbook’s introduction before operating the oven.
¡Also remember to read this operating instruction for proper safety information and instruction before using
the oven.
¡See the cookbook for specific recipes.
¡Prior to setting the controls, place one cup of water in the oven, in a heat-proof glass measuring cup, for
testing purposes.
¡You may open the door while the oven is operating.
¡As soon as the door is opened, the safety mechanisms stop power.
¡To continue cooking, close door, then the oven is operated.
¡If you wish to change the time during cooking, simply adjust the TIMER to desired minutes.
¡When time has elapsed, a bell will ring and the oven will turn off.
NOTE : Output power refer to a value of reference.
SYMBOL M/W POWER LEVEL OUTPUT POWER
LOW 165W
DEFROST 310W
MEDIUM 520W
MED. HIGH 725W
HIGH 900W

9
2. GRILL COOKING
¥Grilling in this oven is similar to conventional broiling.
¥There is no need to preheat the oven for griling.
1. Place food on the Metal Rack, and set it on the Tray.
2. Set POWER knob to GRILL position.
3. Set TIMER knob to the cooking time.
EXAMPLE : To Grill hamburgers, steaks, kabobs, etc. use the trays this way:
To use :
• Place food on Metal Rack.
• Place the Metal Rack directly on the
Turntable.

10
2. COMBINATION COOKING
¥This oven has 3-cooking levels in SIMUL-COOKING.
¥You can select these levels by POWER knob.
1. Place food on the Metal Rack or Tray.
2. Set POWER knob to SIMUL position.
3. Set TIMER knob to the cooking time.
• To prevent the oven operating with the door open, this oven is fitted with safety door interlock switches.
If you wish to inspect the food during the cooking time, simply open the door.
The oven will automatically stop the cooking.
• To continue cooking, close the door.
• If you wish to stop the cook during the cooking, simply turn the timer knob to the point “OFF”.
Cooking time can be reset at any time during cycle by turing the timer knob.
• Do not let the timer continue to oeprate after removing food.
(COMBI 1) (COMBI 2) (COMBI 3)
Grill Grill Grill
+++
M/W Low M/W Med Low M/W Med

11
INTERLOCK MECHANISM FUNCTIONS AND ADJUSTMENTS
The door lock mechanism is a device which has been specially designed to completely eliminate micreowave
radiation when the door is opened during operation, and thus to perfectly prevent the danger resulting from the
leakage of microwave.
(1) Primary interlock switch
When the door is closed, the hook will lock the oven door.
If the door is not closed properly, the oven will not operate.
When the door is closed, the hook pushes the lever downward.
The lever presses the button of the primary interlock switch to bring it under ‘ON’ condition.
Adjustment 1
When the door is closed, the switch button is pushed
by the hook.
The movement of the switch button should exceed 1.2
mm measured at the top of the button.

12
(2) Secondary interlock switch, monitor interlock switch
When the door is closed, the hook pushes the lever lock forward, and the lever presses the button of the interlock
monitor switch to bring it under ‘OFF’ condition. Simultaneously, the lever lock presses the button on the
secondary interlock switch to bring it under ‘ON’ condition.
Adjustment 2
Interlock monitor switch
When the door is closed, the monitor switch should be opened before other switches closed.
When the door is opened, the monitor switch should be closed after other switches opened.
Secondary interlock switch
The movement of the switch button should exceed 1.2mm measured at the top of the button.
Adjustment step:
a) Loosen the two mounting screws.
b) Adjust the interlock switch assembly position.
c) Confirm the gap(1.2mm) described above.
d) Make sure that the latch lever moves smoothly after adjustment is completed
e) Completely tighten the two mounting screws.
Monitor interlock s/w
Lever hook
Hook
Door open monitor s/w
Lever lock
Spring hook lever

13
PRECAUTIONS FOR DISASSEMBLY AND REPAIR
- 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 wear rubber gloves when servicing the high voltage side.
(3) Warning about the electric charge in the high voltage capacitor. When inspecting and repairing the high voltage
side, always short the capacitor terminals and make sure of discharge.
1. Check the earthing.
Do not operate on a 2-wire extension cord. The
microwave oven is designed to be used when earthed.
It is imperative, therefore, to makes sure it is earthed
properly before begining repair work.
2. Warning about the electric charge in the
high voltage capacitor. (Refer to Fig. 1)
For about 30 seconds after the operation stops, 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 screw
driver to discharge.
(4) When the fuse(normal blow type) is blown out due to the operation of the monitor switch; replace primary,
secondary interlock switch and monitor switch.
Refer 11~12 page for the necessary adjustment.
(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 repairing the
magnetron.
WARNING: When servicing the appliance, care is required when touching or replacing high potential parts due
to electrical shock or exposure of microwave energy. These parts are as follows-H.V. transformer,
Magnetron, H.V. Capacitor, H.V. Diode.
Fig.1

14
DISASSEMBLY AND ASSEMBLY
1. To remove cabinet (Refer to Fig. 2)
1) Remove four screws on cabinet back.
2) Push the cabinet backward.
2. To remove parts of guide wind assembly
(Refer to Fig.3)
1) Release the earth screw .
2) Remove the noise-filter to the guide wind .
3) Pull the fan to the motor shaft.
4) Release two screws which secure the motor shaded pole .
5) Remove the motor shaded pole.
6) Release a screw which secure the holder capacitor .
7) Remove the holder capacitor and capacitor to the guide wind.
8) Remove the diode H.V .
9) Reverse the above steps for reassembly.
Fig. 2
Fig. 3
F57
F53
F57
F52 F42
F45
F44 F43
F47
F48
F46
F49
F42
F52 F44
F49
F43
F47
F48
F45
F46

15
3. To remove lamp. (Refer to Fig. 4)
1) Remove a screw holding lamp to the
guide air .
2) Remove the lamp.
3) Reverse the above steps for reassembly.
4. To remove H.V. Transformer
(Refer to Fig. 5)
1) Remove four screws which secure the H.V.
Transformer bracket to the base plate.
2) Remove the H.V. Transformer .
HIgh voltage circuit wiring
H.V. Capacitor
H.V. Diode
H.V. Fuse
H.V. Trans
Magnetron
F36
F21
F22
F34
F37
F37 F36
F34
F22
F21
Fig. 4
Fig. 5

16
5. To remove magnetron and magnetron thermostat. (Refer to Fig. 6)
1) Remove two screws which secure the thermostat .
2) Remove the thermostat.
3) Remove three screws which secure the magnetron .
4) Remove the magnetron.
5) Reverse the above steps for reassembly.
CAUTION : Never install the magnetron without the metallic gasket plate which is packed with each
magnetron to prevent microwave leakage. Whenever repair work is carried out on magnetron,
check the microwave leakage. It shall not exceed 4mW/cm
2
for a fully assembled oven with door
normally closed.
Wave guide magnetron antenna
Metallic gasket plate
F26
F24 F23
F26
F25
F23
F24
F25
Fig. 6
Magnetron
antenna
Metallic
gasket
plate
Cooling fin
Magnetron Filament
terminal

17
REF.NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK
B1 3516705830 CONTROL-PANEL ABS 1
B2 3513403900 KNOB VPC ABS 1
B3 3513401220 KNOB ABS 1
B4 4415A66600 SW MICRO VP-532A-OF SPNC #187 1
B5 7121301611 SCREW TAPPING T2S PAN 3X16 MFZN 1
B6 3515101600 SPRING FLAT SUS-301 T0.5 1
B7 3517401200 COUPLER VPC KNOB POM 1
B8 7S312X40A1 SCREW SPECIAL T1 TRS 4X10 SE MFZN 1
B9 3517401100 COUPLER TIMER POM 1
B10 3518204900 TIMER KN60MKD11E-P 1
B11 7S341W40B1 SCREW SPECIAL T2S PAN 4X12 PW SE MFZN 2
B12 4415A17352 SW MICRO VP-533A-OF SPNO #187 1
B13 7121301611 SCREW TAPPING T2S PAN 3X16 MFZN 1
Fig. 7
CONTROL PANEL AS : 3516710620 Fig. 8
B5
B4
B1
B2
B6 B8 B10
B11
B13
B12
B3
B9
6. To remove parts of control panel assembly (Refer to Fig. 7.8)
1) Remove a screw holding control panel assembly to the oven
front plate. At the same time, draw forward the control panel
assembly from oven front plate.
2) Remove two screws which secure the timer assembly .
3) Remove the timer assmebly .
4) Pull out the knob from the timer assembly .
5) Pull out the coupler timer from the timer assembly .
6) Remove a screw which secure the sw MICRO .
7) Pull out the sw MICRO from the control panel .
8) Remove a screw which secure the coupler VPC knob .
9) Pull out the coupler VPC knob and knob VPC from the
control panel .
10) Remove the spring flat .
11) Remove a screw which secure the sw MICRO .
12) Pull out the sw MICRO from the control panel .
13) Reverse the above steps for reassembly.
B11 B10
B10
B3
B9
B13 B12
B12
B8
B7 B2
B1
B6
B5 B4
B1B4
B7
B1
B10
B10
✔ Caution: In this Service 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)

18
7. To remove door assembly (Refer to Fig. 9)
1) Remove two bolts and two nuts which secure to hinge.
2) Remove door assembly .
3) Remove door above for reassembly taking case to replace fixing glue.
8. To remove door parts. (Refer to Fig. 10)
1) Remove the frame door and barrier-screen .
2) Remove the absorber microwave .
3) Pull the two fixture hook .
4) Remove the spring hook .
5) Remove two hooks , and lever hook .
REF.NO. PART CODE PART NAME DESCRIPTION Q’TY REMARK
A1 3511704600 DOOR PAINTING AS 1
A2 3517001800 BARRIER-SCREEN *I TEMPERED GLASS 3.2T 1
A3 3513100600 HOOK POM 2
A4 4413A44001 LEVER HOOK AS KOR-640 1
A5 4413A40052 FIXTURE HOOK SWRM3 Ø5.5XL12.5 2
A6 441G448071 SPRING HOOK SWPA80 1
A7 3510100300 ABSORBER MICROWAVE PAI+FERRITE 1
A8 3517003600 BARRIER-SCREEN *O GLASS 3.0T 1
A9 3512203000 FRAME DOOR ABS 1
DOOR AS : 3511704420 Fig. 10
Fig.9
F19 F20
A00
A9 A8
A7
A5
A6
A3 A4
F20
A00
F19
✔ Caution: In this Service 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)

19
9. Method to reduce the gap between the door seal and the oven front surface.
(1) To reduce gap located on part ‘A’.
1) Loosen a Hex Bolt on top door hinge, then push
the door to contact the door seal to oven front
surface.
2) Tighten a Hex Bolt.
(2) To reduce gap located on part ‘B’.
1) Loosen a Hex Bolt on bottom hingle, then push
the door to contact the door seal to oven front
surface.
2) Tighten a Hex Bolt.
(3) To reduce gap located on part ‘C’
1) Remove the cabinet.
2) Loosen a screw on interlock switch assembly located bottom of oven body.
3) Draw the interlock switch assembly inward as possible to engage with hook on the door bottom.
4) Tighten a screw.
(4) To reduce gap located on part ‘D’.
1) Remove the cabinet.
2) Loosen a screw on interlock switch assembly located top of oven body.
3) and (4) are same as step (3).
NOTE : Small gap may be acceptable if the microwave leakage does not exceed 1mW/cm
2
.
NOTE : The door on a microwave oven is designed to act as an electronic seal preventing the leakage of
microwave energy from the oven cavity during the cook cycle, This function does not require that the
door be air-tight, moisture (condensation) - tight or light-tight. Therefore, the occasional appearance of
moisture, light or the sensing of gentle warm air movement around the oven door is not abnormal and
do not of themselves, indicate a leakage of microwave energy from the oven cavity. If such were the
case, your oven could not be equipped with a vent, the very purpose of which is to exhaust the vapor-
laden air from the oven cavity.
Door hook
(under)
Mounting screw
(bottom)
Interlock monitor
switch Mounting screw (Top)
Primary
interlock switch
Door hook
(upper)

20
10. To remove tray motor. (Refer to Fig. 11)
1) Cut the tray motor cover parts from the base
plate (Refer to Fig 11, 12).
2) Remove the tray motor cover.
3) Remove two screws which secure the tray
motor to tray motor bracket.
4) Remove the tray motor.
Fig. 12
(Bottom)
(Front)
Slit
Nipper
File
Fig. 11
F11
F12
F11
F12