Daewoo KOC-1B4K9SA1 Service manual

Daewoo KOC-1B4K9SA1 Service manual
S/M No. :
Service Manual
Microwave Oven
Model: KOC-1B4K9R43
✔ 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).
Dec. 2008
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.
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
1. SAFETY AND PRECAUTIONS....................................................................................................................................2
2. SPECIFICATIONS ........................................................................................................................................................3
3. EXTERNAL VIEW.........................................................................................................................................................3
3-1. OUTER DIMENSION ..........................................................................................................................................3
3-2. FEATURE DIAGRAM .........................................................................................................................................4
4. INSTALLATION ............................................................................................................................................................5
5. CONTROL PANEL .......................................................................................................................................................6
6. DISASSEMBLY AND ASSEMBLY ..............................................................................................................................7
7. INTERLOCK MECHANISM AND ADJUSTMENT.....................................................................................................18
8. TROUBLESHOOTING GUIDE ...................................................................................................................................19
9. MESUREMENT AND TEST .......................................................................................................................................25
9-1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................25
9-2. MICROWAVE RADIATION TEST ....................................................................................................................26
9-3. COMPONENT TEST PROCEDURE................................................................................................................27
9-4. COMPONENT ACTION....................................................................................................................................28
10. WIRING DIAGRAM...................................................................................................................................................29
11. EXPLODED VIEW AND PARTS LIST ..................................................................................................................30
11-1. DOOR ASSEMBLY.........................................................................................................................................30
11-2. CONTROL PANEL ASSEMBLY.....................................................................................................................30
11-3. TOTAL ASSEMBLY ........................................................................................................................................30
12. PRINTED CIRCUIT BOARD ....................................................................................................................................34
13. P.C.B CIRCUIT DIAGRAM.......................................................................................................................................38
1
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.
2
2. SPECIFICATIONS
MODEL
KOC-1B4K9R43
POWER SUPPLY
240V-50Hz,SINGLE PHASE WITH EARTHING
MICROWAVE
1500 W
POWER
GRILL
1700 W
CONSUMPTION
CONVECTION
2400 W
COMBINATION
2400 W
MICROWAVE ENERGY OUTPUT
1000W (IEC705)
MICROWAVE FREQUENCY
2450MHz
OUTSIDE DIMENSIONS (W x H x D)
560X344X543mm (22.0X13.5X21.3 in.)
CAVITY DIMENSIONS (W x H x D)
368.5X246X376.5mm (14.5X9.7X14.8 in.)
NET WEIGHT
APPROX.21.5kg (47.6 lbs.)
TIMER
60 minutes
FUNCTION SELECTIONS
MICROWAVE/GRILL/CONVECTION/COMBINATION
POWER SELECTIONS
10 LEVELS
CAVITY VOLUME
1.2 Cu.Ft
* Specifications are subject to change without notice.
3. EXTERNAL VIEW
3-1. OUTER DIMENSION
3
2. FEATURES DIAGRAM
1 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.
2 DOOR VIEWING SCREEN - Allows viewing of food. The screen is designed so that light can pass through, but
not the microwave.
3 METAL RACK
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.
9ROLLER GUIDE - This must always be used for cooking together with the turntable tray.
0 COUPLER - This fits over the shaft in the center of the ovens cavity floor. This is to remain in the oven for all
cooking.
q CONVECTION OUTLET & FAN
w OVEN FRONT PLATE
e DOOR SEAL - Door seal maintains the microwave energy within the oven cavity and prevents microwave
leakage.
r UNDER HEATER
4
4. INSTALLATION
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 10 amperes,
240V, 50Hz.
• 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.
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 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.
5
5. CONTROL PANEL
1
2
3
4
7
%
6
5
More
Less
Clock
Language
q
0
Memory
Cake
8
9
Crusty Auto Cook
p
o
u
i
M/W
w
GRILL
y
COMBI
e
CONVECTION
AUTO DEFROST
t
r
Ti
ity
Weight Quan
e
t
m
d
s
a
STOP/CLEAR
START/
SPEEDY COOK
6
DISPLAY WINDOW
1 MICROWAVE indicator, showing
microwaving in progress.
2 DEFROST indicator, showing defrosting
in progress.
3 GRILL(upper grill heater) indicator,
showing grilling in progress.
4 GRILL(lower grill heater) indicator,
showing grilling in progress.
5 CONVECTION indicator, showing
convectioning in progress.
6 CHILD LOCK indicator.
7 % percentage microwave power level
indicator.
BUTTONS
8 Language : Press to select the
language.
9 Clock : Use to set clock.
0 Less : Use to remove time from cooking.
q More : Use to add time to cooking.
w M/W : Press to select microwave power
level.
e COMBI : Press to select combi cooking
mode.
r AUTO DEFROST : Press to select
defrost menu.
t CONVECTION : Press to select
convection temperature.
y GRILL : Press to select grill.
u Cake : Press to select cake menu.
i Crusty : Press to select crusty menu.
o Auto Cook : Press to select auto cook
menu.
p Memory : Use to set favorite cooking
mode.
a START/SPEEDY COOK : Press to start
a programme, also for speedy start (each
press adds 30 seconds microwave
cooking time).
s STOP/CLEAR : Press once to stop a
programme, and twice to cancel a
programme.
d Dial knob : Use to set time, weight and
quantity.
6. DISASSEMBLY AND ASSEMBLY
- 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.
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.
SHORT
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.
7
1. To remove cabinet
1) Remove three screws on 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.
8
3. To remove door parts.
REF. NO
PART CODE
PART NAME
DESCRIPTION
Q'TY
A01
3511714100
DOOR SEAL AS
KOC-1B0K0S
1
A02
3513101200
HOOK
POM
1
A03
3515101800
SPRRING HOOK
PW1
1
A04
3511716610
DOOR SUB AS
KOC-1B4K5S OMEGA
1
A05
3512604210
HANDLE DOOR
S45C
1
A06
3515308200
SUPPORTER HANDLE
S45C
2
A07
7001503311
SCREW MACHINE
PAN 5X33 MFZN
2
A08
3517004080
BARRIER-SCREEN *O
TEMP GLASS T3.2 MIRROR
1
A09
3515204900
STOPPRER HINGE *T AS
KOC-1B0K0S
1
A10
3512302300
GASKET DOOR
PBT
1
(1) Remove the gasket door from door seal as.
(2) Remove the door frame from door seal as.
(3) Remove the stopper hinge top from door seal as.
(4) Remove the spring and the hook.
(5) Remove two screws from door sub as.
(6) Remove the handle door and barrier screen outer from door sub as.
(7) Remove the barrier screen outer from handle door.
(8) Reverse the above steps for reassembly.
9
REMARK
4. Method to reduce the gap between the door seal and the oven front surface.
(1) To reduce gap located on part ‘A’.
• Loosen two screws on stopper hinge top, and then push the door
to contact the door seal to oven front surface.
• Tighten two screws.
(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 may be acceptable if the microwave leakage does not exceed 4mW does not exceed 4mW/cm2.
10
5. To remove control panel parts.
REF. NO
PART CODE
PART NAME
DESCRIPTION
B01
3515501720
WINDOW DISPLAY
SAN
1
B02
3516724140
CONTROL-PANEL SUB AS
KOC-1B4K9R43
1
B03
3516908350
BUTTON FUNCTION-A
ABS
1
B04
3516908450
BUTTON FUNCTION-B
ABS
1
B05
3513406050
KNOB VOLUME
ABS
1
B06
3511605130
DECORATOR RING
ABS
4
B07
3516908550
BUTTON FUNCTION-C
ABS
4
B08
PKBPMSAD00
PCB BUTTON AS
KOC-1B4K0S
1
B09
7121301011
SCREW TAPPING
T2S PAN 3X10 MFZN
7
B10
PKMPMSAD20
PCB MAIN AS
KOC-1B4K5S
1
B11
7122401211
SCREW TAPPING
T2S TRS 4X12 MFZN
4
(1) Remove four screws(B11) which secure the control panel.
(2) Pull out the Main PCB assembly(B10).
(3) Remove seven screws(B09) which secure the control panel.
(4) Pull out the Sub PCB assembly(B08).
(5) Pull out the Knob volume(B05) from the Sub PCB assembly.
(6) Pull out six buttons from the control panel.
(7) Pull out Decorator ring(B06) and Window display (B01) from the control panel.
(8) Reverse the above steps for reassembly.
11
Q'TY
REMARK
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
7. To remove magnetron.
(1) Remove a screw which secure the magnetron.
(2) Remove the magnetron.
(3) 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/cm2 for a fully assembled oven with door normally closed.
Metallic
gasket
plate
Magnetron antenna
Cooling fin
Filament
terminal
12
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.
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.
13
10. To remove Lamp assembly parts.
10
11
REF. NO
PART CODE
PART NAME
DESCRIPTION
1
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN 1
2
3512520500
GUIDE AIR OUTLET
SA1D T0.5 1
3
3513303000
INSULATOR HEATER*T
SECC T0.5 1
4
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN 2
5
3511407800
COVER LAMP
STS430 T0.5 1
6
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN 2
7
3513003900
HOLDER LAMP AS
3513003910
8
3513602600
LAMP
3513603200
Q'TY
REMARK
KOC-1B0K0S
1
Used with LAMP, 120V
KOC-1B0K5A
1
Used with LAMP, 12V
HALOGEN 120V 25W
2
HALOGEN 12V 20W
1
9
3511407810
COVER LAMP
GLASS T2.0
1
10
5EPV048308
TRANS POWER
DMR-1B0FS
1
11
7122400811
SCREW TAPPING
T2S TRS 4X8 MFAN
1
1) Remove a screw 1 and pull out Guide air outlet 2.
2) Remove two screws 4 and pull out insulator heater *t 3.
3) Pull out the Lamp assembly.
4) Remove two screws 6 pull out the Lamp assembly.
5) Pull out the Holder lamp assembly 7 from the Cover lamp 5.
6) Pull out the Lamp 8 from the Holder lamp assembly 7.
7) Reverse the above steps for reassembly.
14
Used with TRANS
POWER, DMR-1B0FS
Used with LAMP, 12V
11. To remove Top heater assembly parts.
5
6
7
1
8
2
3
4
REF. NO
PART CODE
PART NAME
DESCRIPTION
1
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
2
3512520500
GUIDE AIR OUTLET
SA1D T0.5
1
3
3513303000
INSULATOR HEATER*T
SECC T0.5
1
4
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
2
5
3512767000
HARNESS HEATER
KOC-1B0K0S
1
6
3510607700
BRACKET HEATER *T
SA1D T0.5
1
7
3512803800
HEATER MIRACLON
115V 550W 270MM
2
8
3511407600
COVER HEATER *T
STS430 T0.5
1
1) Remove a screw 1 and pull out Guide air outlet 2.
2) Remove two screws4 and pull out insulator heater *t3.
3) Pull out the Top heater assembly.
4) Pull out the Harness heater5.
5) Pull out the Braket heater*t6 from the Cover heater*t8.
6) Pull out the Heater miraclon7 from the Cover heater*t8.
7) Reverse the above steps for reassembly.
15
Q'TY
REMARK
12. To remove Rear heater assembly parts.
REF. NO
PART CODE
PART NAME
DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
7112401011
3511407300
7112401011
3511407400
3512766900
3512803800
3511407700
7113400814
7400504011
3511800700
7S627W50X1
3512766800
7051400811
3513302900
7113400814
3963514330
3511800900
7402704600
SCREW TAPPING
COVER MOTOR*B
SCREW TAPPING
COVER*B
HARNESS CONVECTION-B
HEATER MIRACLON
COVER HEATER*B
SCREW TAPPING
WASHER PLAIN
FAN CONVECTION
NUT HEX
HARNESS CONVECTION-A
SCREW MACHINE
INSULATOR HEATER*B
SCREW TAPPING
MOTOR SHADED POLE
FAN
RING-C
T1 TRS 4X10 MFZN
SA1D-80 T0.5
T1 TRS 4X10 MFZN
SA1D-80 T0.5
KOC-1B0K0S
115V 550W 270MM
SA1D-80 T0.5
T1 BIN 4X8 MFNI
PW5-5 BRASS
SA1D-80 T0.5
6N-1-4 BSNI
KOC-1B0K0S
PAN 4X8 SW MFZN
SBHG-1 T0.5
T1 BIN 4X8 MFNI
230V 50HZ MW10CA-TO
PBT
CR-5 SK5
1) Remove a screw 1 and pull out Cover motor *B 2.
2) Remove a screw 3 and pull out Cover *B 4.
3) Pull out the Harness convection-B 5.
4) Remove four screws t and then pull out the Rear heater assembly.
5) Remove a Nut q and the pull out the Fan convection 0 and Washer plain 9.
6) Remove three screws 8 and then separate the Cover heater *B 7 and the lnsulator heater *B r.
7) Pull out two Heaters 6 from the Cover Heater *B 7.
8) Remo two screw e and then separate the lnsulator heater *B r and Motor shaded pole y.
9) Remove the C-Ring i and then pull out the Fan u from Motor shaft.
10) Reverse the above steps for reassebly.
16
Q'TY
1
1
2
1
1
2
1
1
1
1
1
1
2
1
4
1
1
1
REMARK
13. To remove Motor synchro. And Under heater assembly parts.
CUTTING (6EA)
REF. NO
PART CODE
PART NAME
DESCRIPTION
1
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
2
3511407500
COVER HEATER *U
STS430 T0.5
1
3
3515304000
SUPPORTER HEATER *U
STS430 T0.5
1
4
3512802000
HEATER *U
230V 400W R18374001
1
5
7113400814
SCREW TAPPING
T1 BIN 4X8 MFZN
1
1) Cut the Motor syncro. Cover parts from the base plate.
2) Remove a screw and then pull out Motor syncro.
3) Remove a screw1 and then pull out the Under heater *U. assembly.
4) Remove a screw5.
5) Pull out the Heater *U4 from the Cover heater *U2.
6) Reverse the above steps for reassembly.
17
Q'TY
REMARK
7. INTERLOCK MECHANISM AND ADJUSTMENT
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 losed, the hook pushes the lock lever downward. The lock lever presses the button of the microswitch.
Then the button of the primary interlock switch bring it under “ON” condition.
(2) Secondary interlock switch and interlock monitor 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.
ADJUSTMENT :
Interlock monitor switch
When the door is closed, the interlock monitor switch should be opened before other switches are closed.
When the door is opened, the interlock monitor 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.
If the microwave emission exceed 4mW/cm2, readjust interlock mechanism.
18
8. TROUBLESHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.
1) Check grounding before trouble checking.
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 tranformer, disconnect one load wire from these
parts and check continuity with the AC plug removed. To do otherwise may result in a false reading or damage to
your meter.
NOTE : When electric parts are checked, be sure the power cord is not inserted the wall outlet.
Check wire harness, wiring and connection of the terminals and power cord before check the parts listed below.
CONDITION
Fuse blows.
CHECK
Check continuity of
interlock monitor switch with
door closed
( COM↔NC )
RESULT
CAUSE
Continuity
Malfunction of
Interlock
monitor switch
(COM↔NC)
REMEDY
Replace
No continuity
No
Continuity
Check continuity of
both primary and secondary
interlock switch with door closed
Malfunction of
interlock switch
Replace
Continuity
Continuity
Check continuity of
primary interlock switch contact with
door partially open until interlock
monitor switch contact close
( COM↔NC close )
Check continuity of
primary winding of low voltage
transformer
0 Ωor infinite
Approx.
530Ω
( normal )
Fuse again
blows
Disconnect high voltage
fuse and operate the unit
19
Shorted contacts
of primary
interlock Switch
Defective low
voltage
transformer
Defective
high voltage
transformer
Replace
Replace
Replace
CONDITION
CHECK
RESULT
CAUSE
REMEDY
Outlet has
proper
voltage
fuse does not
blow?
Check continuity of
magnetron
No
continuity
Defective
magnetron.
Replace
Check continuity of noise filter
board
No
continuity
Defective line
filter board
Replace
Check continuity of
power supply cord
No
continuity
Open power
supply cord
Replace
No
continuity
Defective touch
control circuit
Replace
NOTE : All these switches must be replaced at the same time, please refer to (7.Interlock mechanism and
adjust) for adjustment instructions
(TROUBLE 2)
Display shows all figures selected, but oven does not start cooking, even though desired program and time
are set and start button is tapped.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
Turn table
motor and
oven lamp
do
not turn on
Check continuity of
primary interlock switch
No
continuity
Malfunction of
primary interlock
switch
Adjust or
replace
Check continuity of
secondary interlock
and D.O.M switch
No
continuity
Malfunction of
secondary
Interlock and
D.O.M switch
Adjust or
replace
Check D.C voltage
being supplied to
RELAY(RY4) coil
0V
Defective touch
control Circuit
Replace
Approx.
24V DC
Fault contacts
of RELAY
(RY4) or open
relay coil.
Replace
20
TROUBLE 3) No microwave oscillation even though fan motor rotates.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
No
microwave
oscillation
Check continuity of
high voltage fuse
No
continuity
Defective
high voltage
fuse
Replace
Check continuity of
high voltage capacitor terminals
with wires removed
Continuity
Defective
high voltage
transformer
1
Check continuity of
high voltage rectifier in forward
and backward
direction with DC megger
Continuity
in backward
direction
Defective high
voltage rectifier
Replace
No microwave oscillation
Connect megger leads to
magnetron terminal and
magnetron body
Continuity
Defective
magnetron
2
Check D.C voltage
being supplied to
RELAY (RY1) coil
0V
Defective
touch control
circuit
Replace
Approx.
24V DC
Faulty contacts of
RELAY
(RY1) or open
relay coil
Replace
Defective
high voltage
transformer
Replace
Defective high
voltage
transformer
Replace
Defective
magnetron
Replace
Check resistance of primary
and secondary coil of high
voltage transformer
Check continuity of filament
terminal of high voltage
transformer
Check continuity of
magnetron heater with wires
removed
No continuity
No continuity
21
(TROUBLE 4)
Grill heater (upper heater) is not heated; food will not become hot.
CONDITION
Grill heater is
not heated.
CHECK
RESULT
CAUSE
REMEDY
Check continuity of
primary interlock switch
No
continuity
Malfunction of
primary Interlock
switch
Adjust or
replace
Check continuity of
secondary interlock switch
No
continuity
Malfunction of
secondary
interlock switch
Adjust or
replace
Check continuity of
heater
No
continuity
Defective heater
Check D.C voltage
being supplied to
RELAY (RY2) coil
0V
Defective touch
control circuit
Replace
Approx.
24V DC
Faulty contacts of
RELAY
(RY2) or open
relay coil
Replace
Replace
(TROUBLE 5)
1) Convection heater is not heated; food will not become hot.
2) Convection fan motor does no rotate.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
1)Convection
heater is not
heated.
2)Convection
fan and
motor does
not rotate.
Check continuity of
primary interlock switch
No
continuity
Malfunction of
primary Interlock
switch
Adjust or
replace
Check continuity of
secondary interlock
switch
No
continuity
Malfunction of
secondary
interlock switch
Adjust or
replace
Check continuity of
(heater or motor)
No
continuity
Defective motor
Check D.C voltage
being supplied to
RELAY (RY3, RY6) coil
0V
Defective touch
control circuit
Replace
Approx.
24V DC
Faulty contacts of
RELAY
(RY3,RY6) or
open relay coil
Replace
22
Replace
(TROUBLE 6)
Lower heater is not heated; food will not become hot.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
Lower heater
Is not heated
Check continuity of
Primary interlock switch
No
continuity
Malfunction of
primary Interlock
switch
Adjust or
Replace
Check continuity of
secondary interlock
switch
No
continuity
Malfunction of
secondary
interlock switch
Adjust or
replace
Check continuity of
heater
No
continuity
Defective heater
Check D.C voltage
Being supplied to
RELAY (RY7) coil
0V
Defective
Touch control
circuit
Replace
Approx.
24V DC
Faulty contacts of
RELAY
(RY7) or open
relay coil
Replace
Replace
(TROUBLE 7)
The following visual conditions inditions indicate a probable defective touch control Circuit or button P.C.B.
assembly
1. Incomplete segments.
1) segment missing
2) partial segments missing
3) digit flickering other than normal fluorescent slight flickering
2. A distinct change in the brightness of one or more numbers exists in the
display.
3. One or more digits in the display are not on when they should be.
4. Display does not count down or up with time cooking or clock operation.
5. Oven is programmable and cooks normally but no display shows.
6. Display obviously jumps in time while counting down.
7. Display counts down noticeably too fast while cooking.
8. Display does not show the time of day when clear button is touched.
9. Oven lamp and turn table motor do not stop although cooking is finished.
Check if the RELAY(RY4) contacts close and if they are close, replace touch control circuit.
CONDITION
CHECK
Display does
not show
programming
at all, even if
keyboard is
touched.
Check each button for
continuity of the button
23
RESULT
CAUSE
REMEDY
Normal
Malfunction of
touch control
circuit of control
box sub-assembly
Replace
control box
sub-assembly
(TROUBLE 8)
When “ERROR 2 ERROR 3” come on display.
CONDITION
CHECK
RESULT
CAUSE
REMEDY
“ERROR 2 &
ERROR 3”
come on
display
Check continuity of thermistor
(resistance of thermistor)
0Ω or infinite
Replace
Replace
No
continuty
Defective
heater
Replace
continuity
Defective touch
control circuit
Replace
Approx
200k~300kΩ
(room
temperature)
Check continuity of heater
(convection, upper, lower)
24
9. MEASUREMENT AND TEST
9-1. 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 temperature of
the water is 10 ± 2°C (50 ± 3.6°F). If 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 filament heatup 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 ∆ T/t
• ∆ T is difference between initial and ending temperature.
• t is the heating time.
The power measured should be B (Refer to 2. SPECIFICATIONS) W ± 10.0 %.
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)
70
64
60
56
52
49
47
44
42
40
38
B (W)
600
650
700
750
800
850
900
950
1000
1050
1100
25
9-2. MICROWAVE RADIATION TEST
WARNING
1. Make sure to check the microwave leakage before and after repair of adjustment.
2. Always start measuring of an unknown field to assure safety for operating personnel from microwave energy.
3. Do not place your hands into any suspected microwave radiation field unless the safe density level is known.
4. Care should be taken not to place the eyes in direct line with the source of microwave energy.
5. Slowly approach the unit under test until the radiometer reads an appreciable microwave 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 600 cc 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.
1) Measured radiation leakage must not exceed the value
prescribed below. Leakage for a fully assembled oven with
door normally closed must be less than 4mW/Cm2.
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 slowly.
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.
26
9-3. 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 :
Secondary winding ... Approx. 100 Ω±10%
Filament winding ... Approx. 0.1 Ω
Primary winding ... Approx. 1.4 Ω
2. High voltage capacitor
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 10MW once the capacitor charged.
3) A shorted capacitor will show continuous continuity.
4) An open capacitor will show constant 10MΩ.
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 500V dc 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 kΩin 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 Ωor less.
3) A continuity check between each filament terminal and magnetron case should read open.
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.
27
9-4. COMPONENT ACTION
COOKING MODE
MAGNETRON
M/W
●
UPPER
LOWER
REAR
CONVECELEMENT ELEMENT ELEMENT TION FAN
●
GRILL-1
●
GRILL-2
GRILL-3
●
●
COMBI-1
●
●
●
●
●
COMBI-2
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
MANUAL
COMBI-3
MODE
COMBI-4
●
●
COMBI-5
●
●
●
CONVECTION100~130
CONVECTION140~150
CONVECTION160~250
ONE
CAKE/BREAD
●
●
●
●
●
TOUCH
CRUSTY
●
●
●
●
●
ROAST BEEF
●
●
●
●
●
ROAST CHICKEN
●
●
●
●
●
ROAST PORK
●
●
●
●
●
BAKED FISH
●
●
●
●
●
AUTO
BAKED POTATO
●
●
●
●
●
MODE
ROAST POTATO
●
●
●
●
●
FRESH VEGETABLES
●
FROZEN VEGETABLES
●
CASSEROLE
●
28
10. WIRING DIAGRAM
29
11. EXPLODED VIEW AND PARTS LIST
11-1. DOOR ASSEMBLY
Refer to 6. Disassembly and assembly.
11-2. CONTROL PANEL ASSEMBLY
Refer to 6. Disassembly and assembly.
11-3. TOTAL ASSEMBLY
30
REF. NO
PART CODE
A00
3511714060
B00
PKCPSWAD30
F01
PART NAME
DESCRIPTION
Q'TY
DOOR AS
KOC-1B4K5S OMEGA
1
CONTROL PANEL AS
KOC-1B4K5S OMEGA
1
3515202800
STOPPER HINGE *U AS
KOR-121M0A
1
F02
7272400800
SCREW TAPTITE
TT3 TRS 4X8 MFZN
1
F03
3510313530
BASE
SBHG T0.8
1
F04
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
5
F05
3512101400
FOOT
DASF-310
4
F06
3516003700
SPECIAL SCREW
TT3 HEX 4X8 FLG MFZN
4
F07
3518121600
TRANS HV
DT-R10S0-1BTS
1
3518122710
REMARK
R1S5AD ES0A
F08
3518701900
FUSE HV
5KV 0.8A
1
F09
3518303500
CAPACITOR HV
2300VAC 1.10UF #187
1
F10
3518400110
DIODE HV
HVR-1X-70B
1
F11
3513003200
HOLDER HV CAPAITOR
SECC T0.6
1
F12
7272400811
SCREW TAPTITE
TT3 TRS 4X8 MFZN
1
F13
3511407500
COVER HEATER *U
SA1D
1
F14
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
F15
3515304000
SUPPORET HEATER *U
STS 430 T0.5
1
F16
3512802000
HEATER *U
230V 400W R18374001
1
F17
7113400814
SCREW TAPPING
T1 RIN 4X8 MFZN
1
F18
3966031110
MOTOR SYNCRO
220/240V 50/60 SM16
1
F19
7112401011
SCREW TAPPING
T1 TRS 4X10MFZN
1
F20
3517401900
COUPLER
PTFE
1
F21
3511408300
COVER WAVE GUIDE
MICA T0.35
1
F22
3516112200
CAVITY AS
KOC-1B0K0S
1
3516112220
Only used with MAGNETRON,
WM248J(DW)-B
KOC-1B0K0S
F23
7122401211
SCREW TAPPING
T2S TRS 4X12 MFZN
1
F24
3518002900
MAGNETRON
2M218H(F)P
1
3518004500
2M248J(DW)-B
1
F25
3516004000
SPECIAL SCREW
TS BOLT FLANGE 5X12 DACRO
1
F26
3513817000
LOCK
PP
1
F27
3513702100
LEVER SW MICRO
POM KOG-846TOS
1
F28
4415A17352
SW MICRO
VP-533A-0F SPNO #187 200G
2
F29
4415A66910
SW MICRO
VP-531A-0F/SZM-V16-FA-61
2
F30
3513700800
LEVER LOCK
POM
1
F31
7122401211
SCREW TAPPING
T2S TRS 4X12 MFZN
1
F32
3512717700
HARNESS MAIN
KOC-1B0K0S
1
F33
7S627W50X1
NUT HEX
6N-1-4 BSNI
1
F34
3511800700
FAN CONVECTION
SA1D T0.5
1
31
Only used with MAGNETRON,
2M218H(F)P
Only used with CAIVTY AS,
3516112200
Only used with CAIVTY AS,
3516112220
REF. NO
PART CODE
PART NAME
DESCRIPTION
F35
7400504011
WASHER PLAIN
PW-5-5-MFZN
1
F36
7113400814
SCREW TAPPING
T1 BIN 4X8 MFNI
3
F37
3512766800
HARNESS CONVECTION-A
KOC-1B0K0S
1
F38
3511407700
COVER HEATER *B
SA1D-80 T0.5
1
F39
3513302900
INSULATOR HEATER *B
SBHG-1 T0.5
1
F40
7113400814
SCREW TAPPING
T1 BIN 4X8 MFNI
4
F41
3963514330
MOTOR SHADED POLE
230V 50HZ MW10CA
1
F42
7051400811
SCREW MACHINE
PAN 4X8 SW MFZN
2
F43
3511800900
FAN
PBT
1
F44
7112401011
SCREW TAPPING
T1 TRS 4X10MFZN
1
F45
3512803800
HEATER MIRACLON
115V 550W 270MM
2
F46
3512766900
HARNESS CONVECTION-B
KOC-1B0K0S
1
F47
3511407400
COVER *B
SA1D-80 T0.5
1
F48
7112401011
SCREW TAPPING
T1 TRS 4X10MFZN
1
F49
3511407300
COVER MOTOR *B
SA1D-80 T0.5
1
F50
3511800100
FAN
PP GF20
1
F51
3963513000
MOTOR SHADED POLE
230V 25W OEM-15DWC2-A03
1
3963513010
Q'TY
REMARK
230V 25W MW-15CA-B01
F52
3512515300
GUIDE WIND
PP GF20
1
F53
3518605030
NOISE FILTER
DWLF-M05-1
1
F54
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
F55
7121403011
SCREW TAPPING
T2S PAN 4X30 MFZN
2
F56
35113F5Q05
CORD POWER AS
3X1.0 80X80 120-RTML
1
F57
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
2
F59
3513602600
LAMP
HALOGEN 120V 25W
2
Not used LV Transformer
HALOGEN 12V 20W
1
Only used with LV Transformer,
DWR-1B0FS
3513603200
F60
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
2
F61
3518904400
THERMOSTAT
OFF:120 ON:60 V#187
1
F62
7S312X40A1
SCREW TAPPING
T1 TRS 4X10 MFZN
4
F63
3510806800
CABINET
STS430
1
F64
7121400611
SCREW TAPPING
T2S PAN 4X6 MFZN
1
F65
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
2
F66
3513302800
INSULATOR HEATER *T
SECC T0.5
1
F67
3512520500
GUIDE AIR OUTLET
SA1D-80 T0.5
1
F68
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
F69
3511407800
COVER LAMP
SA1D
1
F70
3511407600
COVER HEATER *T
STS430 T0.5
1
F71
3512803800
HEATER MIRACLON
115V 550W 270MM
2
F72
3510607700
BRACKET HEATER *T
SA1D T0.5
1
32
REF. NO
PART CODE
PART NAME
DESCRIPTION
F73
3512767000
HARNESS HEATER
KOC-1B0K0S
1
F74
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
F75
3514801400
SENSOR TEMPERATURE
PTM-K312
1
F76
3517207300
TRAY RACK AS
KOC-1B0KOS 120MM
1
F77
3517207310
TRAY RACK AS
KOC-1B0KOS 30MM
1
F78
3517211100
TRAY METAL AS
KOC-1B0K0S
1
F79
3512521000
GUIDE ROLLER AS
KOC-1B0K0S
1
F80
3516003700
SPECIAL SCREW
TT3 HEX 4X8 FLG MFZN
1
F81
3511407810
COVER LAMP
T/GLASS T2.0
1
F82
7402704600
RING C
CR-5 SK5
1
F83
3515308500
SUPPORTER WIRE
SWRH D=2.0
1
F84
7112401011
SCREW TAPPING
T1 TRS 4X10 MFZN
1
F85
5EPV048308
TRANS POWER
DMR-1B0FS
1
F86
7122400811
SCREW TAPPING
T2S TRS 4X8 MFZN
1
33
Q'TY
REMARK
12. PRINTED CIRCUIT BOARD
CIRCUIT CHECK PROCEDURE
1. Low voltage transformer check
The low voltage transformer is located on the P.C.B.
Measuring condition: Input voltage: 220~240V / Frequency: 50Hz
Terminal
Voltage(load)
Voltage(no load)
6-7
AC 17.0 V
AC 19.9 V
8-9
AC 1.3 V
AC 1.6 V
9-10
AC 1.3 V
AC 1.6 V
NOTE
1. Secondary side voltage of the low voltage transformer changes in proportion to fluctuation of power source
voltage.
2. The allowable tolerance of the secondary voltage is within ± 5% of nominal voltage.
2. Voltage Check
- Key check point
NO
CHECK POINT
1
IC1 PIN 63, 64
2
IC1 PIN 38
REMARK
5VDC±5%
5V
0V
3
T
T : 20 ms(50Hz)
T
T : 250 ns(4MHz)
IC1 PIN 33 OR 34
5V
0V
- Check method
NO
MEASURE POINT
WAVE FORM
REMEDY
REMARK
1
A
DC 5V±5%
Replace ZD3, EC1
NO LOAD
2
B
DC 24V±20%
Replace D20-23, EC6
NO LOAD
NOTE: Each measure point must be measured with GND points.
34
3. Case of no microwave oscillation
1) When touching M/W button, oven lamp turns on and Fan motor and turntable rotate, and cook indicator in
display comes on.
*Cause: RELAY 1 does not operate.
- Check method
STATE
POINT A
POINT B
RELAY 1 ON
+5V DC
GND
RELAY 1 OFF
GND
+24V DC
2) When touching M/W button, oven lamp does not turn on and turntable motor does not rotate but cook indicator
in display comes on.
*Cause: RELAY 1 does not operate.
- Check method
STATE
POINT A
POINT B
RELAY 4 ON
+5V DC
GND
RELAY 4 OFF
GND
+24V DC
3) When touching M/W button, oven lamp turns on and fan motor does not rotate but cook indicator in display
comes on.
*Cause: RELAY 5 does not operate.
- Check method
STATE
POINT A
POINT B
RELAY 5 ON
+5V DC
GND
RELAY 5 OFF
GND
+24V DC
35
4. Case of no heating of upper grill
When touching GRILL1 & COMBI button, oven lamp turns on and Fan motor and turntable motor rotate and cook
indicator in the display comes on.
*Cause: RELAY 2 does not operate.
STATE
POINT A
POINT B
RELAY 2 ON
+5V DC
GND
RELAY 2 OFF
GND
+24V DC
5. Case of no heating of lower grill
When touching GRILL2 & COMBI button, oven lamp turns on and Fan motor and turntable motor rotate and cook
indicator in display comes on.
*Cause: RELAY 7 does not operate.
STATE
POINT A
POINT B
RELAY 7 ON
+5V DC
GND
RELAY 7 OFF
GND
+24V DC
6. Case of no heating of convection grill
When touching CONVECTION button, oven lamp turns on and Fan motor and turntable motor rotate and cook
indicator in the display comes on.
*Cause: RELAY 3 does not operate.
STATE
POINT A
POINT B
RELAY 3 ON
+5V DC
GND
RELAY 3 OFF
GND
+24V DC
36
7. Case of no stopping of the count down timer
When the door is opened during operation, the count down timer does not stop.
B
A
- Check method
POINT
A
B
DOOR OPEN
OPEN
+5V DC
DOOR CLOSED
CLOSE
GND
STATE
CHECK NO
1
METHOD
Check the stage(ON,OFF) of the door open
monitor switch by resistance measurement.
37
REMEDY
Replace door open monitor swith.
13. P.C.B. CIRCUIT DIAGRAM
38
NO
NAME
SYMBOL
SPECIFCATION
PART CODE
Q’TY
1
PCB MAIN
M231
95.5 X 197
3514322720
1
2
PCB SUB
M232
88 X 197
3514322730
1
3
BUZZER
BZ1
BM-20K
3515600100
1
4
CAPACITOR CERAMIC
C1~C4,C7~C12
104 50V Z AXIAL
CCZF1H104Z
10
5
CAPACITOR CERAMIC
C5,C6
102 50V Z AXIAL
CCZB1H102K
2
6
CAPACITOR ELECTRO
EC1
50V RS 10uF
CEXE1H100A
1
7
CAPACITOR ELECTRO
EC2,EC4
35V RSS 220uF
CEXF1V221V
2
8
CAPACITOR ELECTRO
EC6
35V RSS 1000uF
CEXF1V102V
1
9
CAPACITOR ELECTRO
EC5
50V RSS 220uF
CEXF1H221V
1
10 CAPACITOR ELECTRO
EC3
50V RSS 100uF
CEXF1H101V
1
11 CONNECTOR FILM
CN3
HLEM15S-1
4CW215SBD0
1
12 CONNECTOR WAFER
CN1
35313-0210
30166M7020
1
13 CONNECTOR WAFER
CN2
35312-0310
30166M5030
1
14 CONNECTOR WAFER
CN4
35328-0610
4CW3061MX0
1
15 DIODE SWITCHING
D1~D17
1N4148 AUTO 52mm
DZN4148---
17
16 DIODE RECTIFYING
D18~D23
1N4004A AUTO 52mm
DZN4004A--
6
17 DIODE ZENER
ZD1
UZ -3.3BSB
DZUZ3R3BSB
1
18 DIODE ZENER
ZD5
UZ -3.9BSB
DZUZ3R9BSB
1
19 DIODE ZENER
ZD2
UZ -5.6BSB
DZUZ5R6BSB
1
20 DIODE ZENER
ZD4
UZ -13BSA
DZUZ13BSA-
1
21 DIODE ZENER
ZD3
UZ -24BSB
DZUZ24BSB-
1
22 DIGITRON
DP1
HNM-07MS12
DHNM07MS12
1
23 HOLDER VFD
DPH
NYLON 66
3513002000
1
24 IC MICOM
IC1
TMP87CK14N-2B01
13GS1B1K00
1
25 RESISTOR
R2,R3,R7~R9,R16 1/6W 10K Ohm 5%
RD-AZ103J-
6
26 RESISTOR
R1,R4,R18,R20
1/6W 1K Ohm 5%
RD-AZ102J-
4
27 RESISTOR
R5
1/6W 200 Ohm 5%
RD-AZ201J-
1
28 RESISTOR
R6
1/6W 1M Ohm 5%
RD-AZ105J-
1
29 RESISTOR
R13~R15,R17
1/6W 4.7K Ohm 5%
RD-AZ472J-
4
30 RESISTOR
R25
1/6W 47K Ohm 5%
RD-AZ473J-
1
31 RESISTOR
R19
1/4W 1K Ohm 5%
RD-4Z102J-
1
32 RESISTOR
R23
1/2W 270 Ohm 5%
RD-2Z271JS
1
33 RESISTOR
R24
1/2W 27 Ohm 5%
RD-2Z270JS
1
34 RESISTOR
R21,R22
1/2W 200 Ohm 5%
RD-2Z201JS
2
35 RESISTOR
R10
1/4W 301K Ohm 1%
RN-4Z3013F
1
36 RESISTOR
R11
1/4W 10K Ohm 1%
RN-4Z1002F
1
37 RESISTOR
R12
1/4W 120K Ohm 1%
RN-4Z1203F
1
38 RESISTOR ARRAY
RA1
7P(6) 1/8 100K 5%
RA-87X104J
1
39 RESISTOR ARRAY
RA2,RA3
5P(4) 1/8 100K 5%
RA-85X104J
2
40 RESONATOR CERAMIC CR1
CRT-4.00MS
5P4R00MTS-
1
41 SW RELAY
G5G-1A-DT 24V
5SC0101124
1
RY1
39
REMARK
NO
NAME
SYMBOL
SPECIFCATION
PART CODE
Q’TY
RY2,RY3
G5G-1A-DT 24V
5SC0101124
2
"
(OZF-S-124LM1P)
5SC0101117
2
43 SW RELAY
RY4~RY7
CS11-24SH
5SC0101129
4
44 TRANSISTOR
Q1,Q2
KTA1266Y AUTO
TZTA1266Y-
2
45 TRANSISTOR
Q3,Q4,Q12,Q15
KTC3198GR AUTO
TZTC3198GR
4
46 TRANSISTOR
Q14
KTC-1027Y AUTO
TZTC1027Y-
1
47 TRANSISTOR
Q5~Q11,Q13
KRC106M AUTO
TZRC106M--
8
48 TRANS POWER
LVT1
DMR-210FS
5EPV041410
1
49 WIRE COPPER 20mm
J2
1/0.52 TIN COATING
85801052GY
1
50 WIRE COPPER12.5mm
J3~J7
1/0.52 TIN COATING
85801052GY
5
51 WIRE COPPER 10mm
J1,J8,J9,J16
1/0.52 TIN COATING
85801052GY
4
52 WIRE COPPER 7.5mm
J10~J15
1/0.52 TIN COATING
85801052GY
6
53 WIRE COPPER 7.5mm
SJ5
1/0.52 TIN COATING
85801052GY
1
42 SW RELAY
REMARK
KOC-1B4K0S01,
1B4K0S31,1B4K9SA1
54 WIRE COPPER 7.5mm
SJ3
1/0.52 TIN COATING
85801052GY
1
KOC-1B4K5S,
1B4K5S10
55 CONNECTOR WAFER
CN101
HLEM15R-1
4CW215RBD0
1
56 RESISTOR
R101,R102
1/6W 1K Ohm 5%
RD-AZ102J-
2
57 RESISTOR
R103,R104
1/6W 10K Ohm 5%
RD-AZ103J-
2
58 SW ROTARY
EN101
5S10109002
1
SDB161PVB17F-1-236-36PC(PITCH5)
59 SW TACT
SW101~SW115
KPT-1115AM
5S50101Z93
15
60 WIRE COPPER 15mm
J101
1/0.50 TIN COATING
85801052GY
1
61 WIRE COPPER 10mm
J102~J104,J106
1/0.51 TIN COATING
85801052GY
4
62 WIRE COPPER 7.5mm
J105
1/0.51 TIN COATING
85801052GY
1
63 WIRE FLAT
WF1
1.25X15X90XC
WSJ-159007
1
40
DAEWOO ELECTRONICS CORP.
1-2, Jeo-dong 1(il)-ga, Jung-gu, Seoul, Korea
C.P.O. BOX 8003 SEOUL, KOREA
TELEX: DWELEC K28177-8
CABLE: “DAEWOOELEC”
S/M NO. :
PRINTED DATE: Dec. 2008
ABOUT THIS MANUAL
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