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.
SAFETY AND PRECAUTIONS.............................................................................. ......... ......... ......... .. 2
FOR SAFE OPERATION.................................................................................................................. 2
FOR SAFE SERVICE PROCEDURES............................................................................................. 2
EXPLODED VIEW AND PARTS LIST................................................................................................ 29
DOOR ASSEMBLY........................................................................................................................... 29
CONTROL PANEL ASSEMBLY ....................................................................................................... 29
TOTAL ASS EMBL Y... .......... .. ........... .......... .......... .. ........... .......... .......... .......... ... .......... .......... . ......... 29
Page 3
SAFETY AND PRECAUT IONS
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 attem p t 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 em ission check should be perform ed prior to servicing the oven.
(a) inform the manufacturer, im porter or assembler,
(b) repair the unit at no cost to the owner,
(c) attem pt 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 com pliance.
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 with the following code.
Green-and-yellow: E arth
Blue: Neutral
Brown: Live
As the colours of the wires in the m anins lead of this appliance m ay 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 termianl 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 term inal 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.
Page 4
SPECIFICATIONS
KOR -630A
MODELKOR-630A0S
POW E R SU PPLY230V, 50Hz, SIN GLE PHASE WITH EARTHING
MICROWAVE1200W
POWER CONSUMPTION
MICRO WAVE ENER G Y OU TPUT800W
MICRO WAVE FREQ UEN CY2450MHz
OUTS IDE DIMENSIONS (W X H X D)465 x 279 x 360 m m (18.3 x 11.0 x 14.2 in.)
CAVITY DIMEN SIONS (W X H X D)290 x 220 x 306 m m (11.4 x 8.7 x 12.0 in.)
NET W E IGHTAPPRO X. 13 Kg ( 28.7 lbs.)
TIMER59 m in. 90 sec.
FUNCTION SELECTIONSMICROWAVE
POWER SELECTIONS10 LEVELS
CAVITY VOLU M E0.7 Cu.Ft.
GRILL
COMBINATION
KOR -860A
MOD ELKOR-860A0SKOR-860A0N
POWER S U P P LY230V, 50Hz(860A0S)/220V,50Hz(860A0N)
SINGLE PHASE W ITH EARTHING
MICROWAVE1350W1250W
POWER CONSUMPTION
MICROWAVE ENERGY OUTPUT900W
MICRO WAVE FREQ UEN CY2450MHz
OUTS IDE DIMENSIONS (W X H X D)495 x 294 x 388 m m (19.5 x 11.6 x 15.3in.)
CAVITY DIMEN SIONS (W X H X D)320 x 244 x 338 m m (12.6 x 9.6 x 13.3 in.)
NET WEIG HTAPPROX. 15 Kg ( 33.1 lbs.)
TIMER59 min. 90 sec.
FUNCTION SELECTIONSMICROWAVE
POWER SELECTIONS10 LEVELS
CAVITY VOLU M E0.9 Cu.Ft.
Specifications are subject to change without notice.
GRILL
COMBINATION
Page 5
EXTERNAL VIEW
1. OUTER DIMENSION
KOR-630A
KOR-860A
465
360
9
7
2
495
294
Page 6
2. FEATURE DIAGRAM
EXTERNAL VIEW
1. DOOR SEAL
Door seal maintains the microwave within the oven cavity and prevents microwave leakage.
2. DOOR HOOK
When door is closed, it will automatically lock shut. If door is opened while oven is operating, magnetron tube will immediately
stop operating.
3. DOOR SCREEN
Allows viewing of food. Microwave cannot pass through perforations in screen.
4. SPATTER SHIELD
Protects the microwave outlet from splashes of cooking foods.
5. OVEN LAMP
Automatically turns on during oven operating.
6. SAFETY INTERLOCK SYSTEM
7. CONTROL PANEL
8. GLASS COOKING TRAY
Made of special heat resistant glass. The tray must always be in proper position before operating. Do not cook food directly
on the tray..
9. OVEN FRONT PLATE
10. DOOR OPENING BUTTON
To open the door, push the door opening button. When door is closed, it will automatically lock shut. If door is opened while
oven is operating, magnetron tube will immediately stop operating.
11. ROLLER GUIDE
Supports the glass cooking tray.
Page 7
EXTERNAL VIEW
3. CONTROL PANEL
1. Time set pad -
2. Display -
3. One touch -
4. Auto cook -
5. More -
6. Less -
7. Auto Defrost -
8. Power -
9. Defrost -
10. Kitchen Timer -
11. Clock -
12. Stop/Clear -
13. Start/easy cook -
Used to remove time from cooking.
Used to set the cooking time and the present time.
Cooking time, power level, indicators and present time are displayed.
Used to cook or reheat specific quantities of food.
Used to cook or reheat.
Used to add time to cooking.
Used to defrost foods.(for weight)
Used to set power level.
Used to defrost foods.(for time)
Used as a minute timer, delay cooking, hold setting after cooking.
Used to set clock.
Used to stop the oven operation or to delete the cooking data.
Used to start the oven and also used to set a reheat tim e.
Page 8
INSTALLATI ON
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.
This microwave oven requires a current of approximately 6amperes, 230 Volts, 50 Hz / 220Volts, 50Hz(KOR-860A0N).
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 ampere fuse other than those specified.
This appliance is supplied with cable of special type, which, if damaged, m ust 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.
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 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 a c c e p t th e plu g o n th e 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.
Page 9
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 mu st always
be in place during cooking.
3. Close the door securely.
4. When the oven door is opened, the light turns off.
5. The oven door can be opened at any time during operation by touching the door release button on the control panel.
The oven will automatically shut off. To restart the oven, close the door and then touch STA RT.
6. Each time a pad is touched, a BEEP will sound to acknowledge the touch.
7. The oven automatically cook on full power unless set to a lower power level.
8. The display will show :0 w hen the oven is plugged in.
9. Time clock returns to the present tim e when the cooking time ends.
10. When the STOP/CLEAR pad is touched during the oven operation, the oven stops cooking and all information retained.
To erase all information (except the present time), touch the S TOP/CLEAR pad once m ore. If the oven door is opened
during the oven operation, all inform ation is retained.
11. If the S TART pad is touched and the oven does not operate, check the area between the door and door is closed
securely. The oven w ill not start cooking under the door is com pletely closed or the program has been reset.
Make sure the oven is properly install
Va ria b le po w e r c o o k ing
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.
TOUCH POWER PAD.POWER LEVEL (DISPLAY)APPROXIMATE PERCENTAGE OF POWER
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 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 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.
CAUTION
Service personnel should remove their watches whenever working close to or replacing the m agnetron.
WARNING
W hen 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 - H V Transform er, Magnetron, HV C apacitor, HV D iode, HV Fuse.
Page 11
D ISASSE MBLY AND ASSE MBLY
1. To remove cabinet
(1) Remove three screws on cabinet back.
(2) Push the cabinet backward.
2. To remove door assembly
(1) Remove a screw which secure the stopper hinge top.
(2) Remove the door assembly from top plate of cavity.
(3) Reverse the above for assembly.
NOTE
After replacing the door assembly, perform a check of
correct alignment with the hinge and cavity front plate.
3. To remove door parts
DOOR ASSEMBLY
: 3511710320(KOR-630A)
: 3511710720(KOR-860A)
KOR -630A
REF. NOPART CODEPART NAMEDESCRIPTIONQ’TYREMARK
A013512203810FRAM E D O ORABS XR -401 H-29381
A023517003050BARRIER-SCREEN*OACRYL 1
A033515304610SUPP ORTE R B ARR -S*OPP1
A043515204100STOPPER HINGE *T ASKOR-63150S1
A053511705500DOO R WELD A SKOR-61150S1
A063517002800BARR IER-SCREE N *IPOLYESTER T0.11
A073512300200GASKET DOORPP1
A083513100700HOOKPOM1
A093515101300SPRING H O OKPW11
Page 12
D ISASSEMBLY AND ASSEMBLY
KOR -860A
REF. NOPART CO DEPART NAMEDESCRIPTIONQ’TYREMARK
A013512204110FRAM E DO O RABS XR -401 H-29381
A023517003150BARRIER-SCREEN *OA CRYL T1.51
A033515304410SUPPOR TER B ARR -S*OP P1
A043515204100STOPPER HING E *T ASKOR-63150S1
A053511705620DOO R W E LD ASKOR-81250S1
A063517002900BARRIER-SCREEN *IPOLYESTER T0.11
A073512300400GASKET DOORPP1
A083513100700HOOKP OM1
A093515101300SPRING HO OKPW 11
1) Remove the gasket door from door weld AS.
2) Remove the barrier screen inner from door weld AS.
3) Remove the door frame from door weld AS.
4) Remove the stopper hinge top from door weld AS.
5) Remove the spring and the hook.
6) Remove the supporter barrier screen outer from door frame.
7) Remove the barrier screen outer from door frame.
8) Reverse the above steps for reassembly.
4. Method to reduce the gap between the door seal and the oven front surface.
1) To reduce gap located on part ‘A’.
• Loosen a screw on stopper hinge top, and then push
the door to contact the door seal to oven front surface.
• Tighten a screw.
2) To reduce gap located on part ‘B’.
• Loosen two screws on stopper hinge under, and then push
the door to contact the door seal to oven front surface.
• Tighten two screws.
NOTE
A small gap m ay be acceptable if the microw ave leakage does not exceed 4mW/cm2.
Page 13
D ISASSE MBLY AND ASSE MBLY
5. To remove control panel pats.
CONTROL PAN EL ASSEMBLY
: PKCPSW ZE 00(KOR -630A)
: PKCPSW N E00(KO R-860A)
KOR -630A
REF.NOPART CO DEPART NAMEDESCRIPTIONQ’TYREMARK
B013518521100SWITCH M E MBR ANEKOR -630A0S1
B023516719410CONT ROL-PANELABS XR-401 H -29381
B03PKMPMSZA00PCB MAIN ASKOR -631H0S1
B047122401211SCRE W TAPPINGT2S TRS 4x12 MFZN4
B053513702710LEVER DOOR OPENABS XR-401 H -29381
B06441G430171SPRING BU TTONSW P DIA 0.71
B073516906910BUTTON DO OR OP ENABS XR-401 H-29381
KOR -860A
REF.NOPA RT CODEPART NAMEDESCR IPTIO NQ’TYREMARK
B013518521300SW ITCH ME M BR ANE
B023516720210CONT ROL-PANELABS XR-401 H-29381
B03P K M PMSZA00PCB MAIN ASKOR-631H0S1
B047122401211SCR EW TAPPINGT2S TRS 4x12 MFZN4
B053513702710LEVER D O OR OP ENABS XR-401 H -29381
B06441G430171SPR ING BUTTO NS W P D IA 0.71
B073516906910BUTTON DO OR O PENABS XR-401 H-29381
KOR -860A0S
1
Page 14
D ISASSEMBLY AND ASSEMBLY
1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly.
2) Remove the door open lever from the control panel.
3) Remove four screws which secure the PCB assembly to control panel.
4) Disconnect membrane tail from the conector of the PCB assembly.
5) Detach membrane from the control panel.
6) Remove the door open button and button spring from the control panel.
7) Reverse the above steps for reassembly.
6. To remove high voltage capacitor.
1) Remove a screw which secure the 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 circuit wiring
Page 15
D ISASSE MBLY AND ASSE MBLY
7. To remove magnetron.
1) Remove a screw which secure the magnetron.
2) Remove the magnetron.
3) Reverse the above steps for reassembly.
NOTE
Never install the magnetron without the metallic g as ket p la t e wh ic h is p a c k e d with e a c h magnetron to prevent
microwave leakage. Whenever repair w ork is carried out on magnetron, check the microwave leakage. It shall not
exceed 4mW /cm
2
for a fully assembled oven w ith door normally closed.
Page 16
8. To remove wind guide assembly.
1) Remove a screw for earthing.
2) Remove the noise filter from the wind guide.
3) Remove a screw which secure the wind guide assembly.
4) Draw forward the wind guide assembly.
5) Pull the fan from the motor shaft.
6) Remove two screws which secure the motor shaded pole.
7) Remove the motor shaded pole.
8) Reverse the above steps for reassembly.
D ISASSEMBLY AND ASSEMBLY
9. To remove H.V.transformer.
1) Remove four screws holding the H.V.transformer.
2) Remove the H.V.transformer.
3) Reverse the above steps for reassembly.
Page 17
INTER LOCK MECHANISM AND ADJUSTME NT
The door lock mechanism is a device which has been specially designed to completely eliminate microwave 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 locks
the oven door. If the door is not closed properly,
the oven will not operate. When the door is closed,
the hook pushes the button of the microswitch.
Then the button of the primary interlock switch bring
it under “ON” condition.
2. Secondary interlock switc h and interlock mon itor switch
When the door is closed, the hook pushes the lock
lever downward. The lock lever presses the button of the
interlock monitor switch to bring it under “OFF” condition
and presses the button of the secondary interlock switch
to bring it under “ON” condition.
ADJUSTMEN T
Interlock monitor sw itch
When the door is closed, the interlock monitor switch should be opened before other switches are closed.
When the door is opened, the interlock m onitor switch should be closed after other switches are opened.
3. Adjustment steps
(a) Loosen the one mounting screw.
(b) Adjust interlock switch assembly position.
(c) Make sure that lock lever moves smoothly after adjustment is completed.
(d) Tighten completely one mounting screw.
NOTE
Microwave emission test should be performed after adjusting interlock mechanism .
2
If the microw ave emission exceed 4mW /cm
, readjust interlock mechanism.
Page 18
TROUBLE SHOOTING GUIDE
CONDITION
Continuity
0 infinite
Approx.
(norm al)
Fuse again
Replace
Replace
Replace
Replace
Replace
Malfunction
Malfunction
of interlock
Shorted
contacts of
Defective
high voltage
Following the procedure below to check if the oven is defective or not
1. Check grounding before checking trouble.
2. Be careful of the high voltage circuit.
3. Discharge the high voltage capacitor.
4. When checking the continuity of the switches, fuse or high voltage transformer, disconnect one lead wire from these parts
and then check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to your meter.
NOTE
W hen electric parts are checked, be sure the power cord is not inserted the wall outlet.
“Check wire harness, wiring and connected of the terminals and power cord before check the parts listed below.
(TROUBLE 1)
Fuse blows.
Door shut, timer set, but no cooking tak es place.
CHECKRESULTCAUSEREMEDY
Check continuity of
interloc k monitor switch
with door closed
(COM <-> NC)
Check continuity of both
prim ary and secondary
interloc k sw itch with
door closed
Check continuity of
primary in terlock switch
contact with door
partially open until
interloc k monitor switch
contact close
(COM <-> NC close)
(COM <-> NC)
Continuity
(COM <-> NC)
No Continuity
No
Continuity
Continuity
of interlock
monitor
switch
switch
primary
interlock
switch
NOTE 1
NOTE 1
NOTE 1
Check continuity of
primary winding of low
voltage transformer
Disconnect high voltage
fuse and operate the unit
Ω
or
150~310
blows
Defective low
voltage
transformer
transformer
Page 19
TROUBLE SHOOTING GUIDE
CONDITION
M alfun c tion
Defective
Faulty
contacts of
Adjust or
Adjust or
Replace
Replace
No
Continuity
0 V
CONDITION
Defective
supply cord
Defective
Replace
Adjust
Adjust
CHECKRESULTCAUSEREMEDY
Outlet has
proper voltage
Fuse does not
blow.
Check continuity of
magn etron
Check continuity of noise
filter board
Check continuity of
power supply cord
No
Continuity
No
Continuity
No
Continuity
Normal
Defective
magn etron
noise filter board
Open pow er
touch control
circu it
NOTE
All these switches must be replaced at the same tim e, please refer to “Interlock Mechanism And A djustm ent”.
(TROUBLE 2)
Display show s all fi gures selec ted, but oven d oes not sta rt co oking, even though desire d
program and ti me are set and start pad is tapped.
Replace
Grill heater is
not heated.
CHECKRESULTCAUSEREMEDY
Check continuity of
primary interlock switc h
Check continuity of
secondary interlock an d
D.O.M . switch
Check D .C. voltage
being supplied to
RELAY (RY2) coil
No
Continuity
Approx
15 VDC
Malfunction
of primary
inte rlock switch
of secondary
interlock and
D.O.M . switch
touch control
circuit
RELAY
(RY2) or open
rela y c oil
Replace
Replace
Page 20
TROUBLE SHOOTING GUIDE
CONDITIO N
Continuity
0 or
No
Continuity
No
Continuity
0 V
Approx
13 VD C
Defective
high voltage
Defective
high voltage
Defective
magnetron
Defective
magnetron
Defective
high voltage
Defective
high voltage
Defective
touc h c o n tr o l
Faulty
contacts of
(R Y3) or open
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
(TROUBLE 3)
No m icrowave
oscillation
No m icrowave oscillation even though fan motor rotates.
CHECKRESULT
Check continuity of high
voltage fuse
Replace high voltage fuse
Check continu ity of high
voltage ca pacitor
term inals with wires
remo v ed
Check continuity of high
volt age rec tifier in
forward and backward
direction with DC
megger
Conn ect meg ger leads to
m agnetron terminal and
m agnetron body
No
Continuity
Continuity
Continuity in
backward
direction
CAUSE
tran sfo rmer
rec tifier
REMEDY
Ch ec k resistan ce of
primary and secondary
coil of high volta ge
transforme r
Check continu ity of
m agnetron with wires
removed
Check continu ity of
filament term inal of high
voltage transformer
Check D.C. voltage
being supplie d to
RELAY (RY3) coil
Ω
tran sfo rmer
tran sfo rmer
circuit
RELAY
relay co il
Page 21
TROUBLE SHOOTING GUIDE
CONDITION
Replace
control box
sub-assembly
Replace
the bu tton
Malfunction
Malfunction
( TROUBL E 4 )
The follow ing visual conditions indicate a probable defective touch control circuit
or m em bra nce switch assem b ly.
1. Incomplete segments,
1) Segments missing.
2) Partical segments missing.
3) Digit fickering other than normal fluorescent slight flickering.
4) “ : 0 ” does not display when power is on.
2. A distinct change in the diplay are not on when they
numbers is the display.
3. One or more digits in the diplay are not on when they should be.
4. Display indicates a number different from one touched.
5. Specific numbers (for example 2 or 3) will not display when the panel is touched.
6. Display does not count down or up with time cooking or clock operation.
7. Oven is programmable and cooks normally but no display shows.
8. Display obviously jumps in time while counting down.
g
9. Display counts down noticeably too fast while cooking.
10. Display does not show the time of day when clear pad is touched.
11. Oven lamp and turntable motor do not stop although cooking is finished. Check if the RELAY 2 contacts close if they are
close, replace touch control circuit.
CHECKRESULTCAUSEREMEDY
Display does
not show
program m ing
at all, even if
keyboard is
touched.
Check each button for
continuity of the button
keyboard for the
following keyboard
check procedure
Norm al
Norm al
of touch
control circuit
of control box
sub-assembly
of botton
keyboard
keyboard
NOTE
Before following the particular steps listed above in the rtouble shooting guide for the m embrane keyborad’s, failure,
please check for the continuity of each wire-harmess between the m em brane keyboard and P.C.B. assembly.
Page 22
ME ASUREME NT AND TEST
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT
Microwave output power can be checked by indirectly measuring the temperature rise of a certain amount of water exposed to
the microwave as directed below.
PROCEDURE
1. Microwave power output measurement is made with the microwave oven supplied at rated voltage and operated at its
maximum microwave power setting with a load of 1000 ± 5cc of potable water.
2. The water is contained in a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside
diameter of approximately 190 mm.
3. The oven and the empty vessel are at ambient temperature prior to the start of the test. The initial tem perature of the water is
10 ± 2 °C (50 ± 3.6 °F). It is measured immediately before the water is added to the vessel. After addition of the water to the
vessel, the load is immediately placed on the center of the shelf, which is in the lowest normal position.
4. Microwave power is switched on.
5. Heating time should be exactly A seconds (Refer to table as following).
Heating time is measured while the microwave generator is operating at
full power. The filam ent heat-up time for magnetron is not included.
6. The initial and final temperature of water is selected so that the maximum
difference between the ambient and final water temperature is 5K.
7. The microwave power output P in watts is calculated from the following
formula:
P = 4187 x
The power measured should be B (Refer to 2. SPECIFICATIONS) W ± 10.0 %.
is difference between initial and ending tem perature.
T
t is the heating time.
T/ t
CAUTION
1. Water load should be measured exactly to 1 liters.
2. Input power voltage should be exactly specified voltage (Refer to 2. SPECIFICATIONS).
3. Ambient temperature should be 20 ± 2° C (68 ± 3.6°F)
Heating time for power output:
A (second)7064605652494744424038
B (W)600650700750800850900950100010501100
Page 23
MEASUREMENT AND TE ST
2. MICROWAVE RADIATION TEST
WARNING
Make sure to check the microwave leakage before and after repair of adjustment.
Always start measuring of an unknown field to assure safety for operating personnel from m icrowave energy.
Do not place your hands into any suspected microwave radiation field unless the safe density level is known.
Care should be taken not to place the eyes in direct line with the source of microw ave energy.
Slowly approach the unit under test until the radiom eter reads an appreciable m icrowave leakage from the unit under the test.
PROCEDURE
1. Prepare Microwave Energy Survey Meter,600cc glass beaker, and glass
thermometer 100°C (212°F ).
2. Pour 275cc ±15cc of tap water initially at 20 ± 5 °C (68 ± 9°F) in the 600cc
glass beaker with an inside diameter of approx. 95 mm(3.5 in.).
3. Place it at the center of the tray and set it in a cavity.
4. Close the door and operate the oven.
5. Measure the leakage by using Microwave Energy Survey Meter with dual
ranges, set to 2450MHz.
Measured radiation leakage must not exceed the value prescribed below.
(1)
Leakage for a fully assembled oven with door normally closed must be
2
less than 4mW/cm
(2) When measuring the leakage, always use the 5 cm (2 in.) space cone
with probe. Hold the probe perpendicular to the cabinet and door.
Place the space cone of the probe on the door, cabinet, door seem,
door viewing screen, the exhaust air vents and the suction air vents.
(3) Measuring should be in a counter-clockwise direction at a rate of 1 in./sec.
If the leakage of the cabinet door seem is unknown, move the probe more slow ly.
(4) When measuring near a corner of the door, keep the probe perpendicular to the areas making sure the probe end at the
base of the cone does not get closer than 2 in. from any metal. If it does not, erroneous reading may result.
.
Page 24
MEASUR E MENT AND TEST
3. COMPONENT TEST PROCEDURE
High voltage is present at the high voltage terminal of the high voltage transformer during any cooking cycle.
It is neither necessary nor advisable to attempt measurement of the high voltage.
Before touching any oven components or wiring, always unplug the oven from its power source and discharge the capacitor.
1. High voltage transformer
(1) Remove connections from the transformer terminals and check continuity.
(2) Normal readings should be as follows :
(1) Check continuity of capacitor with meter on the highest OHM scale.
(2) A normal capacitor will show continuity for a short time, and then indicate 10M
(3) A shorted capacitor will show continuous continuity.
(4) An open capacitor will show constant 10M
(5) Resistance between each terminal and chassis should be infinite.
3. High voltage diode
(1) Isolate the diode from the circuit by disconnecting the leads.
(2) With the ohmmeter set on the highest resistance scale measure the resistance across the diode terminals. Reverse the
meter leads and again observe the resistance reading. Meter with 6V, 9V or higher voltage batteries should be used to
check the front-back resistance of the diode, otherwise an infinite resistance may be read in both directions. A normal
diode's resistance will be infinite in one direction and several hundred K
in the other direction.
4. Magnetron
For complete magnetron diagnosis, refer to “Measurement of the Microwave Output Power." Continuity checks can only
indicate and open filament or a shorted magnetron.
To diagnose for an open filament or a shorted magnetron,
(1) Isolate magnetron from the circuit by disconnecting the leads.
(2) A continuity check across magnetron filament terminals should indicate 0.1
(3) A continuity check between each filament terminal and magnetron case should read open.
or less.
5. Fuse
If the fuse in the primary and monitor switch circuit is blown when the door is opened, check the primary and monitor switch
before replacing the blown fuse. In case the fuse is blown by an improper switch operation, replace the defective switch and
fuse at the same time. Replace just the fuse if the switches operate normally.
Page 25
WIRING DIAGR AM
Page 26
PRINTED CIRCUIT BOARD
1. CIRCUIT CHECK PROCEDURE
1) Low voltage transformer check
The low voltage transformer is located on the P.C.B.
Measuring condition: Input voltage: 220~230 V / Frequency: 50Hz
Terminal VoltageLOADNO LO AD
4 - 7AC 12.6 VAC 14.7 V
NOTE
1. Refer to C ircuit Diagram (point 4).
2. Secondary side voltage of the low voltage rtansformer changes in proportion to fluctuation of power source voltage.
3. The allowable tolerance of the secondary voltage is within 5% of nominal voltage.
2) Voltage Check
- Key check point
NOCHECK POINTREMARK
1IC1 PIN 2,21,30,34-5VDC
2IC1 PIN 35
T : 2 0 m s (5 0 H z )
3IC1 PIN 31 OR 32
T : 250 ns(4MHz)
- Check method
NOMEASURE POINTW AVE FORMREMEDYREM ARK
1MP1DC -5V± 0.25VReplace VL1, EC1, ZD2N O LO AD
2MP2DC -12V± 2.0VReplace EC 2, D12,13,14NO LOA D
NOTE
Each measure point m ust be m easured with GND points.
Page 27
PRINTED CIRCUIT BOARD
3) When ther e is no mi c r owav e o sc ill a t ion
(1) When touching
START
pad, oven lamp does not turn on.
Fan motor do not rotate, but cook indicator in display comes on.
Cause :
RELAY 2
does not operate. re fer to Circ uit Dia g r am ( Poi n t 3 )
- Check method
POINT
STA T E
RELAY 2
RELAY 2
(2) When touching
ON- 5VDCGND
OFFGN D- 12VDC
START
pad, oven lamp turns on.
AB
Fan motor and turntable rota te and cook indicator in display comes on.
Cause :
RELAY 2
does not operate. refer to Circuit Diagram ( Point 2 )
- Check method
POINT
STA T E
RELAY 1
RELAY 1
O N-5V DCGN D
OFFGND-12VDC
AB
4) When the door is opened during operation, the Count dow n timer does not stop.
refer to Circuit Diagram ( Point 1 )
- Check method
POINT
STA TE
DOOR OPENOPEN-5VDC
DOOR CLOSEDCLOSEG ND
CHECK NOMETHODREMEDY
1
Ch eck the stage (ON,OFF ) of the seconda ry interlock switch by resistance
me asurement.
AB
Replace secondary interlock switch.
5) When the digital clock does not operate properly.
refer to Circuit Dia gram ( Point 5 )
POINTWAVE FORM
A T: 20 ms (50 Hz )
If clock does not keep exact tim e, you must check resistor R15,16, zener diodeZ D1.
Page 28
2. PCB CIRCUIT DIAGRAM
PRINTED CIRCUIT BOARD
Page 29
PRINTED CIRCUIT BOARD
3. P.C.B. LOCATION NO.
NONAM ESYMBO LSP ECIFICATIO NPART CODEQ'TY
1B UZZERBZ1BM-20K35156001001
2C ARR AYCA17P(6) 102 M 50VCN 6XB-102M1
3C APACITOR ELECE C116V RSS 100uFCEXF1C101V1
4C APACITOR ELECE C225V RSS 1000uFCEXF1E102V1
5C ON NE CTOR WAF ERCN1Y W 396-02AV35191505201
6C ON NE CTOR WAF ERCN2Y W 396-05AV35191505101
7C ON NE CTOR WAF ERCN3FC Z254-11441M3671601
8D IODE REC TIFYD1~6,9~121N4148DZN4148---10
9D IODE R ECTIFYD13,141N4002ADZN4002A--2
10DIODE ZENERZD1MTZ 5.1VB 1/2WDZTZ5R1B--1
11D IODE ZENERZD2MTZ 3.9VB 1/2WDZTZ3R9B--1
12LED DISPLAYDP1D DG-631HDDDG631H--1
13PCB MA INM15881.5X139.935143154101
14R ARRAYRA17P(6) 1/8 100K JRA-87X104J1
15RESISTORR1~R71/6W 330 5%RD-AZ331J-7
16RESISTORR8,10,12,14,221/6W 1K 5%R D -AZ102J-5
17RESISTORR11,20,211/6W 100K 5%R D -AZ104J-3
18RESISTORR131/6W 100 5%RD -AZ101J-1
19RESISTORR15~171/6W 10K 5%RD-AZ103J-3
20RESISTORR181/6W 1M 5%RD -AZ105J-1
21RESISTORR191/4W 51 5%RD-4Z510J-1
22REGULATORVL1MC7905C1MC 7905C--1
23TRANSISTORQ1~5,9~11KRA -102MTZRA102M --8
24TRANSISTORQ6KTA-1270YTZTA 1270Y-1
25TRANS PO W ERLVT1D MR -631P5EP U0353021
26IC MICO MIC1TMP47C440BN-NF9413GS371GH01
27RESONATOR CERACR1KBR-4.0MSTF5PKBR40MKS1
28SW R ELAYRY1G5G-1A DC12V5SC01011211
29SW R ELAYRY2G5B-1 DC12V5SC01011101
30CAPACITOR CER A C6102 50V Z AXIALCCZF1H102Z1
31CAPACITOR CER A C1~5,C7104 50V Z AXIALCC ZF1H104Z6
Page 30
EXPLODED VIEW AND PARTS LIST
1. DOOR ASSEMBLY
Refer to Disassembly and assem bly.
2. CONTROL PANEL ASSEMBLY
Refer to Disassembly and assem bly.
3. TOTAL ASSEMBLY
Page 31
EXPLODED VIEW AND PARTS LIST
KOR-630A0S
REF NO.PART CODEPA RT NA MEDESCRIPTIONSUPPLYREMARK
A00DO OR A SRefer to d isas se mbly a n d a s s e m b lyO
B00CONT RO L-PANEL ASRefer to disassem bly and assemblyO
F013510801310CA BINETPCM T0.6 GEO
F027112401011S CREW TAPPINGT1 TRS 4X10 MFZNO
F033516019000CAVITY WELD ASCAVITY W E LD ASO
3516109600CAVIT Y JOINT ASCAVITY JO INT ASO
F047122401211S CREW TAPPINGT2S TRS 4X12 MFZNO
F057122401211S CREW TAPPINGT2S TRS 4X12 MFZNO
F067112401011S CREW TAPPINGT1 TRS 4X10 MFZNO
F0735113AEQ0DCORD POW E R AS3X0.75 70X70 100-R TML O
F084413A90012CLAMP POWER CORDNYLON66O
F097112401011S CREW TAPPINGT1 TRS 4X10 MFZNO
F107122401211S CREW TAPPINGT2S TRS 4X30 MFZNO
F114415D67620FUSE250V 12A 65TSO
4415D67120FUSE250V 12A MDAO
F123518606200FILTER NOISEDWLF-M12O
F137121403011S CREW TAPPINGT2S PAN 4X30 MFZNO
F143512517000GU IDE WINDPPO
F153963513100M O TOR SH ADE PO LE230V 17W OEM -10DWC2-A07O
3963512310MOTOR SHADE PO LE230V 20W MW 10C A-M02O
F163511800300FANPP+30%GLASSO
F173518002200M AGN ETRO N2M218H(MF) IO
F183516004000S PECIAL SCRE WT2 BOLT FLANG E 5X12 DACR OO
F197272400811SCREW TAPTITETT3 TRS 4X8 MFZNO
F203513003200HO LDER H V CA PACITORSEC C T0.6O
F213518302200CAPACITOR HV
F223518400400DIODE H VHVR-1X-3AB 12KV #187O
F233518701100FUSE HV5KV 0.55A HV-41A55-02O
F243518113700TR ANS HVDY-N80S0-63TO
F253516003700S PECIAL SCRE WTT3 FLG HEX 4X8 MFZNO
F263510311700BASESBHG T0.8O
F277112401011S CREW TAPPINGT1 TRS 4X10 MFZNO
F283512100900FO OTPP DASF-130O
F297272400811SCREW TAPTITETT3 TRS 4X8 MFZNO
F303515201101STOPPER H INGE *USCP-1 T2.5O
F314415A17352SW MICROVP-533A-OF SPNO #187 200GO
F324415A66910S W M ICROVP-531A-O F/SZM-V16-FA-61O
F334415A17352SW MICROVP-533A-OF SPNO #187 200GO
F344415A17352SW MICROVP-533A-OF SPNO #187 200GO
F353513702600LEV ER LOCKPOMO
F363513811700LOCKPOMO
F373513601600LAM PBL 240V 25W T25 C7A H187O
F387121400611S CREW TAPPINGT2S PAN 4X6 MFZNO
F393966310100MOTOR S YNCRO220V 2.5W GM -16-24FD12O
3966310110M O TOR S YNCRO220V 2.5W M2LJ49ZT52O
F403518905300THERMOSTATOFF:75 ON:65 H #187 NBO
F413513003400HO LDER T HERM OS TATP BTO
F427272400811SCREW TAPTITETT3 TRS 4X8 MFZNO
F433511406200CO VE R WAVE GUIDEHEATPROOF PPO
F443517400620CO UP LERX ARECO
F453514700710RO LLERTEFRONO
F463512517300GU IDE ROLLERPP 5113MF6 A353BO
F473517203600TRAYGLASSO
2100VAC 0.98µF #187
O
Page 32
EXPLODED VIEW AND PARTS LIST
KOR-860A0S / KOR -860A0N
REF NO.PART CODEPART NAMEDESCRIPTIONSUPPLYREMARK
A00DOO R ASRefer to d isassembly and assem blyO
B00CON TRO L -PANEL ASR efer to disassembly and assemblyO
F013510801400CABINETPCM T0.6O
F027112401011SCR EW TAPPINGT1 TRS 4X10 MFZNO
F033516109200CAVITY WELD ASCAVITY W ELD ASO
3516109700CAVITY JOINT ASCAVITY JOINT ASO
F047122401211SCR EW TAPPINGT2S TRS 4X12 MFZNO
F057122401211SCR EW TAPPINGT2S TRS 4X12 MFZNO
F067112401011SCR EW TAPPINGT1 TRS 4X10 MFZNO
F0735113 AEQ0DCOR D PO W ER AS3X0.75 70X70 100-RTM L O
F084413A90012C LAMP POW ER CO RDNYLON66O
F097112401011SCR EW TAPPINGT1 TRS 4X10 MFZNO
F107122401211SCR EW TAPPINGT2S TRS 4X30 MFZNO
F114415D67620FUS E250V 12A 65TSO
4415D67120FUSE250V 12A MDAO
F123518606200FILTER NO ISEDWLF-M12O
F137121403011SCR EW TAPPINGT2S PA N 4X30 MFZNO
F143512517000GUIDE W INDPPO
F153963513100MOTOR SHA DE PO LE230V 17W OEM -10DWC2-A07O
3963512310MOTOR SHA DE PO LE230V 20W MW 10CA-M02O
F163511800300FANPP +30%GLASSO
F173518002200MAG NETRO N2M218H(MF) IO
F183516004000SPEC IAL SCREWT2 BOLT FLANGE 5X12 DACROO
F197272400811SCR EW TAPTITETT3 TRS 4X8 MFZNO
F203513003200HOLDER HV CAPACITORSECC T0.6O
F213518112200CAPACITOR HV
F223518400400DIODE HVHVR-1X-3AB 12KV #187O
F233518701100FUSE H V5KV 0.55A HV-41A55-02O
F243518114000TRAN S HVDW-N90S0-86T(KOR-860A0S)O
3518115000TRANS HVDW -N90N0-86T(KOR-860A0N)O
F253516003700SPEC IAL SCREWTT3 FLG HEX 4X8 MFZNO
F263510311900BAS ESB H G T0.8O
F277112401011SCR EW TAPPINGT1 TRS 4X10 MFZNO
F283512100900FOOTPP D ASF-130O
F297272400811SCR EW TAPTITETT3 TRS 4X8 MFZNO
F303515201101STOPPE R H INGE *USCP-1 T2.5O
F314415A17352SW M ICROVP-533A-OF SPNO #187 200GO
F324415A66910SW M ICROVP-531A-OF/SZM-V16-FA-61O
F334415A17352SW M ICROVP-533A-OF SPNO #187 200GO
F344415A17352SW M ICROVP-533A-OF SPNO #187 200GO
F353513702600LEVER LOC KPOMO
F363513811700LOCKPOMO
F373513601600LAMPBL 240V 25W T25 C7A H187O
F387121400611SCR EW TAPPINGT2S PA N 4X6 MFZNO
F393966310100MOTOR SYN CRO220V 2.5W G M-16-24FD12O
3966310110MOTOR SYN CRO220V 2.5W M2LJ49ZT52O
F403518905300THERMO STATOFF:75 ON:65 H #187 NBO
F413513003400HOLDE R THER MO STATPB TO
F423516003700SPEC IAL SCREWTT3 FLG HEX 4X8 MFZNO
F433511406200CO VER WAVE GUIDEHEATPROOF P PO
F444418D10032COUPLERZARECO
F453514700710ROLLERTEFRONO
F463512517300GUIDE RO LLERPP 5113MF6 A353BO
F473517203500TRAYGLASSO
2100VAC 0.98µF #187
O
Page 33
DAEWOO ELECTRONICS CO., LTD
686, AHYEON-DONG MAPO-GU
SEOUL, KOREA
C.P.O. BOX 8003 SEOUL, KOREA
TELEX : DWELEC K28177-8
CABLE : “DAEWOOELE C ”
E-mail : G7F00E@web.dwe.co.kr
FAX : 02) 360-8184
TEL: 02) 360-8188~8180
PRINTED DATE : JUN. 1999
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