How it Works
Daewoo
Loading...
KOC-1B0K0S
User Manual
38 pgs1.33 Mb0

Daewoo KOC-1B0K0S User Manual

S/M No. : C1B0K0S002
Service Manual
Microwave Oven
Model : KOC-1B0K0S
✔
Caution
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr Nov. 2000
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------------------------------------------------17
8. TROUBLE SHOOTING GUIDE ----------------------------------------------------------------18
9. MEASUREMENT AND TEST ------------------------------------------------------------------------- 23 9-1. MEASUREMENT OF THE MICROWAVE OUTPUT-----------------------------------23 9-2. MICROWAVE RADIATION TEST --------------------------------------------------------24 9-3. COMPONENT TEST PROCEDURE ------------------------------------------------------25 9-4. COMPONENT ACTION ---------------------------------------------------------------------26
10. WIRING DIAGRAM ---------------------------------------------------------------------------------27
11. EXPLODED VIEW AND PARTS LIST ---------------------------------------------------------28 11-1. DOOR ASSEMBLY------------------------------------------------------------------------------28 11-2. CONTROL PANEL ASSEMBLY--------------------------------------------------------------28 11-3. TOTAL ASSEMBLY-----------------------------------------------------------------------------28
12. PRINTED CIRCUIT BOARD --------------------------------------------------------------------------32
13. P.C.B. CIRCUIT DIAGRAM ------------------------------------------------------------------------------36
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 micro­ wave 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-1B0K POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH EARTHING
MICROWAVE 1500W POWER CONSUMPTION
MICROWAVE ENERGY OUTPUT 1000W (IEC705) MICROWAVE FREQUENCY 2450MHz OUTSIDE DIMENSIONS (W X H X D) 560 x 344 x 542 mm (22.0 x 13.5 x 21.3 in.) CAVITY DIMENSIONS (W X H X D) 368.5 x 246 x 376.5 mm (14.5 x 9.7 x 14.8 in.) NET WEIGHT APPROX. 21.5 Kg ( 47.6 lbs.) TIMER 60 minutes FUNCTION SELECTIONS MICROWAVE/ GRILL/ CONVECTION/ COMBINATION POWER SELECTIONS 10 LEVELS CAVITY VOLUME 1.2 Cu.Ft.
l SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE.
GRILL 1600W
CONVECTION 2300W
COMBINATION 3100W
3. EXTERNAL VIEW
3-1. OUTER DIMENSION
Fig. 1 Front view
Fig. 2 Side view
3
3-2. FEATURE DIAGRAM
1. Door hook – When the door is closed, it will automatically shut. If the door is opened while
the oven is operating, the magnetron will immediately stop operating.
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.
9. Roller guide – This must always be used for cooking together with the turntable tray.
10. Coupler – This fits over the shaft in the center of the ovens cavity floor. This is to remain in
the oven for all cooking.
11. Convection outlet & fan
12. Under heater
13. Oven front plate
14. Door seal – Door seal maintains the microwave energy within the oven cavity and prevents
microwave leakage.
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 12(8)amperes, 230 Volts, 50 Hz.
• 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
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.
10. less : Use to remove time from cooking.
11. more : Use to add time to
a programme, also for speedy start (each press adds 30 seconds microwave cooking time).
22. stop/clear : Press once to stop a programme, and twice to cancel a programme.
23. dial knob : Use to set time, weight and quantity.
12
15
17 18
20
22
1 2
3 4
language
8
clock
9
c
o
n
m
v
/
e
cake
less
w
defrost
c
t
i
o
n
auto
crusty
more
c
o
m
r
g
auto cook
b
i
l
l
i
7 6 5
10
11
13 14
16
19
cooking.
12. m/w : Press to select microwave power level.
13. combi : Press to select combi cooking mode.
14. auto defrost : Press to select defrost menu.
15. convection : Press to select
memory
h
g
i
t
e
q
w
u
e
m
i
t
n
t
i
t
y
convection temperature.
16. grill : Press to select grill.
17. cake : Press to select cake menu.
18. crusty : Press to select crusty menu.
23
19. auto cook : Press to select auto cook menu.
20. memory : Use to set favorite cooking mode.
21. start/speedy cook : Press to start
21
stop/ clear
start/
speedy cook
6
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 beg­ inning repair work.
2) Warning about the electric charge in the high
voltage capacitor. For about 30 seconds after the operation sto­ pped 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 screw­ driver to discharge.
4. When the 15A fuse is blown out due to the operation of the monitor switch; replace primary interlock switch, secondary interlock switch and interlock monitor switch.
5. After repair or replacement of parts, make sure that the screws are properly tightened, and all electrical connections are tightened.
6. Do not operate without cabinet.
CAUTION : Service personnel should remove their watches whenever working close to or replacing the magnetron.
WARNING : When servicing the appliance, need a care of touching or replacing high potential parts because of electrical shock or exposing microwave. These parts are as follows - HV Transformer, Magnetron, HV Capacitor, HV Diode.
7
✔ 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)
1. To remove cabinet
(1) Remove four 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 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.
A04
A02
A03
REF.NO PART CODE PART NAME DESCRIPTION Q’ TY REMARK
A01 351220 4700 FRAME DOOR PC 1 A02 351700 6900 BARRIER-SCREEN*O TEMP GLASS T3.2 1 A03 7112401011 SCREW TAPPING T1 TRS 4x10 MFZN 2 A04 3515204 900 STOPPER HINGE *T AS KOC-1B0K0S 1 A05 351 2302300 GASKET DOOR PBT 1 A06 7122401211 SCREW TAPPING T2S TRS 4x12 MFZN 1 A07 3513101200 HOOK POM 1 A08 351 5101800 SPRING HOOK PW1 1 A09 3511714100 DOOR SEAL AS KOC-1B0K0S 1 A10 3512603500 HANDLE DOOR PC 1
A09
A05
A06
A07
A10
A08
A01
8
(1) Remove the gasket door from door plate. (2) Remove a screw from door plate. (3) Remove the door frame from door plate. (4) Remove the stopper hinge top from door plate. (5) Remove the spring and the hook.
(6) Remove two screws from door frame.
(7) Remove the handle door and barrier screen outer from door frame. (8) Remove the barrier screen outer from handle door.
(9) 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’ .
1) Loosen two screws on stopper hinge top, and then push the door to contact the door seal to oven front surface.
2) Tighten two screws. (2) To reduce gap located on part ‘ B’ .
1) Loosen two screws on stopper hinge under, and then push the door to contact the door seal to oven front surface.
2) Tighten two screws.
NOTE : A small gap may be acceptable if the microwave leakage does not exceed 4mW does not exceed 4mW/cm2.
9
✔ 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)
5. To remove control panel parts.
REF.NO PART CODE PART NAME DESCRIPTION Q’ TY REMARK
B01 3511605000 DECORATOR C-PANEL ABS XR-401 H-2938 1 B02 3511605100 DECORATOR RING ABS SG-175 SG-0760D 1 B03 3515501700 WINDOW DISPLAY PMMA 1 B04 3516724100 CONTROL PANEL ABS XR-401 H-2938 1 B05 3516908300 BUTTON FUNCTION-A ABS SG-175 SG-0760D 1 B06 3516908500 BUTTON FUNCTION-C ABS SG-175 SG-0760D 1 B07 3516908400 BUTTON FUNCTION-B ABS SG-175 SG-0760D 1 B08 7122401211 SCREW TAPPING T2S TRS 4X12 MFZN 3 B09 3514323010 PCB MAIN AS KOC-1B0K0S 1 B10 7121301011 SCREW TAPPING TS2 PAN 3X10 MFZN 7 B11 3514323110 PCB SUB AS KOC-1B0K0S 1 B12 3516908600 BUTTON FUNCTION-D ABS SG-175 SG-0760D 1 B13 3516908700 BUTTON FUNCTION-E ABS SG-175 SG-0760D 1 B14 3516908200 BUTTON START ABS SG-175 SG-0760D 1 B15 3513406000 KNOB VOLUME ABS SG-175 SG-0760D 1
6. Remove the screw which secure the control panel, push up two snap fits and draw
forward the control panel assembly.
6. Remove three screws (B08) which secure the control panel.
6. Pull out the Main pcb assembly(B09).
6. Remove seven screws(B10) which secure the control panel.
6. Pull out the Sub pcb assembly(B11). (6) Pull out the Knob volume(B15) from the Sub pcb assembly. (7) Pull out six buttons from the control panel. (8) Pull out Decorator ring(B02) and Window display(B03) from the control panel . (9) Pull out the Decorator c-panel(B01) from the control panel. (10) Reverse the above steps for reassembly.
10
6. To remove high voltage capacitor.
assembled oven with door normally closed.
(1) Remove a screw which secure the groun­ ding 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.
l 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
Metallic gasket plate
Magnetron antenna
Cooling fin
Filament terminal
11
Loading...
+ 26 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use