1. DL manuals
  2. Daewoo
  3. Microwave Oven
  4. KOR-180A2A
  5. Service Manual

Daewoo KOR-180A2A Service Manual - External View

Manual is about: Microwave Oven

Summary of KOR-180A2A

  • Page 1

    Service manual microwave oven model: kor-180a2a kor-181g2a kor-181h2a daewoo electronics co., ltd. S/m no. : r180a2a001.

  • Page 2: Table of Contents

    2 precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy (a) do not operate or allow the oven to be operated with the door open. (b) make the following safety checks on all ovens to be serviced before activating the magnetron or other microwav...

  • Page 3: Safety and Precautions

    Safety and precautions caution : this device is to be serviced only by properly qualified service personnel. Consult the service manual for proper service procedures to assure continued safety operation and for precautions to be taken to avoid possible exposure to excessive microwave energy. 1. For ...

  • Page 4: Specifications

    4 specifications model kor-180a2a/181g2a/181h2a power supply 120v~60hz, single phase with earthing microwave 1600 w power grill consumption combination microwave energy output 1200 w microwave frequency 2450mhz outside dimensions (w x h x d) 589x339x487mm (23.2x13.3x19.2 in.) cavity dimensions (w x ...

  • Page 5: External View

    5 external view 1. Outer dimension.

  • Page 6

    6 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....

  • Page 7

    7 kor-180a 1. Time set pad - used to set the cooking time and the present time. 2. Display - cooking time, power level, indicators and present time are displayed. 3. One touch - used to cook or reheat specific quantities of food. 4. Auto cook - used to cook or reheat. 5. More - used to add time to c...

  • Page 8

    8 m/w def more auto cook 1. Bread 2. Soup 3. Baked potato 4. Fresh vegetable 5. Frozen vegetable less timer lock lb popcorn frozen pizza dinner plate meat power defrost poultry fish stop/ clear start/ speedy cook auto defrost clock kitchen timer 1 2 3 4 5 6 7 8 9 0 microwave oven kor-181g 1. Time se...

  • Page 9

    9 m/w def more beverage fresh vegetable frozen vegetable less timer lock lb popcorn frozen pizza dinner plate meat power defrost poultry fish stop/ clear start/ speedy cook auto defrost clock kitchen timer 1 2 3 4 5 6 7 8 9 0 microwave oven kor-181h 1. Time set pad - used to set the cooking time and...

  • Page 10: Installation

    10 installation 1. Steady, flat location. This microwave oven should be set on a steady, flat surface. 2. Leave space behind and side. All air vents should be kept a clearance. If all vents are covered during operation, the oven may be overheated and, eventually, cause oven failure. 3. Away from rad...

  • Page 11: Operations and Functions

    11 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 must always be in place during cooking. 3. Close the door securely. 4. The oven door can be opened at any t...

  • Page 12: Disassembly and Assembly

    12 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 safe during normal operation. However, carelessness in servicing the oven can result in an electric shock or possibl...

  • Page 13

    13 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...

  • Page 14

    14 3. To remove door parts. Ref no. Part code part name description q’ty remark a01 3512205100 frame door abs sg-175, sg-0760d 1 a02 3517007400 barrier-screen*o san t1.5 1 a03 3515204400 stopper hinge *t as kor-162joa 1 a04 3511715500 door as kor-180a 1 a05 3517005200 barrier-screen*i pe t0.1 1 a06 ...

  • Page 15

    15 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’. • loos...

  • Page 16

    16 5. To remove control panel parts. Ref no. Part code part name description q’ty remark 3518522800 switch membrane kor-180a0a 1 b01 3518522810 switch membrane kor-181g2a 1 3518522820 switch membrane kor-181h2a 1 b02 3516726000 control panel abs af-348, vt-0826 1 b03 3514325010 pcb as kor-180a2a 1 b...

  • Page 17

    17 note : never install the magnetron without the metallic gasket plate which is packed with each magnetron to prevent microwave leakage. Whenever repair work is carried out on magnetron, check the microwave leakage. It shall not exceed 4mw/cm 2 for a fully assembled oven with door normally closed. ...

  • Page 18

    18 8. To remove wind guide assembly. 1) remove a screw which secure the wind guide assembly. 2) draw forward the wind guide assembly. 3) pull the fan from the motor shaft. 4) remove two screws which secure the motor shaded pole. 5) remove the motor shaded pole. 6) reverse the above steps for reasemb...

  • Page 19

    19 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 sw...

  • Page 20: Trouble Shooting Guide

    20 trouble shooting 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 tran...

  • Page 21

    21 condition check check continuity of magnetron defective magnetron result no continuity cause remedy replace outlet has proper voltage fuse does not blow. Condition check check continuity of primary interlock switch malfunction of primary interlock switch result no continuity cause remedy adjust o...

  • Page 22

    22 condition check result check continuity of high voltage capacitor terminals with wires removed continuity cause defective high voltage transformer remedy replace no microwave oscillation check continuity of high voltage rectifier in forward and backward direction with dc megger continuity in back...

  • Page 23

    23 (trouble 4) the following visual conditions inditions indicate a probable defective touch control circuit or membrane switch assembly 1. Incomplete segments, 1) segments missing. 2) partical segments missing. 3) digit flickering other than normal display slight flickering. 4) " :0" does not displ...

  • Page 24: Measurement and Test

    24 measurement and test 1. Measurement of the microwave power output microwave output power can be checked by indirectly mmeasuring 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...

  • Page 25

    25 2. Microwave radiation 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 ...

  • Page 26

    26 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 ...

  • Page 27: Wiring Diagram

    27 wiring diagram.

  • Page 28: Printed Circuit Board

    28 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: 120v / frequency: 60hz 2. Voltage check - key check point - check method note 1. Refer to ciruit diagram (point 4). 2. Seconda...

  • Page 29

    29 mp1 mp2 mesure point.

  • Page 30

    30 3. When there is no microwave oscillation 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. → refer to circuit diagram (point 3) - check method 2) when touching start pad, oven lamp turns on...

  • Page 31

    31 2. Pcb circuit diagram.

  • Page 32

    32 no name symbol specification part code q’ty 1 buzzer bz1 bm-20k 3515600100 1 2 c array ca1 7p(6) 102 m 50v cn6xb-102m 1 3 capacitor elec ec1 50v rs 1µf cexe1h109v 1 4 cpapcitor elec ec2 25v rss 1000µf cexf1e102v 1 5 connector wafer cn1 yw396-02av 3519150520 1 6 connector wafer cn3 yw396-05av 3519...

  • Page 33: Exploded View and Parts List

    33 exploded view and parts list 1. Door assembly refer to disassembly and assembly 2. Control panel assembly refer to disassembly and assembly 3. Total assembly.

  • Page 34

    34 ref no part code part name description q'ty a00 3511715500 door as kor-180a0a (kor-180a2a) 1 3511715510 door as kor-181h2a (kor-181g2a / kor-181h2a) 1 b00 3516726410 control-panel as kor-180a2a 1 3516726420 control-panel as kor-181g2a 1 3516726430 control-panel as kor-181h2a 1 f01 3510802400 cabi...

  • Page 35

    35 ref no part code part name description q'ty f33 3513814300 lock pom black 1 f34 3513601500 lamp bl 125v 25w t25 c5a #187 1 f35 7121400611 screw tapping t2s pan 4x6 mfzn 1 f36 3966830700 motor syncro 120v 3w sm012 1 f37 3518905300 thermostat off:75 on:65 h #187 nb 1 f38 3513003400 holder thermosta...

  • Page 36

    Vision creative, inc..

  • Page 37

    S/m no.:r180a2a001 daewoo electronics co., ltd. 686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex: dwelec k28177-8 cable: “daewooelec” printed date: aug, 2001.