1. DL manuals
  2. Daewoo
  3. Microwave Oven
  4. KOR-1A0A0A
  5. Service Manual

Daewoo KOR-1A0A0A Service Manual

Summary of KOR-1A0A0A

  • Page 1

    Service manual microwave oven model: kor-1a1g0a kor-1a1h0a kor-1a0a0a s/m no. : r1a1g0a002_2 jan. 2003.

  • Page 2: Table of Contents

    1 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 2 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. Fo...

  • Page 4: Specifications

    3 specifications model kor-1a1g and kor-1a1h, kor-1a0a power supply 120v~60hz, single phase with grounding microwave 1400 w power grill consumption combination microwave energy output 1000w microwave frequency 2450mhz outside dimensions (w x h x d) 539x300x406mm (21.2x11.8x16.0 in.) cavity dimension...

  • Page 5: External View

    4 external view 406 539 300 m/w m/w lock lb timer popcorn frozen pizza dinner plate more less auto defrost meat power poultry fish defrost stop/clear clock kitchen timer 1 2 3 4 5 6 7 8 9 0 start/ speedy cook auto cook 1.Bread 2.Soup 3.Baked potato 4.Fresh vegetable 5.Frozen vegetable 539 406 300 1 ...

  • Page 6

    M/w m/w lock lb timer popcorn frozen pizza dinner plate more less auto defrost meat power poultry fish defrost stop/clear clock kitchen timer 1 2 3 4 5 6 7 8 9 0 start/ speedy cook auto cook 1.Bread 2.Soup 3.Baked potato 4.Fresh vegetable 5.Frozen vegetable 2 6 1 5 4 8 q 0 7 9 3 5 1. Door seal door ...

  • Page 7

    6 m/w m/w lock lb timer popcorn frozen pizza auto cook dinner plate more less auto defrost meat power poultry fish defrost stop/clear clock kitchen timer 1 2 3 4 5 6 7 8 9 0 start/ speedy cook 2 3 8 9 0 w 4 5 6 7 1 q e 1.Bread 2.Soup 3.Baked potato 4.Fresh vegetable 5.Frozen vegetable 1. Time set pa...

  • Page 8

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

  • Page 9

    8 1 2 3 4 5 6 7 8 9 0 m/w def popcorn beverage dinner plate kitchen timer auto cook more meat poultry fish clock stop/clear start/ speedy cook less auto defrost power defrost frozen pizzza timer lock lb 1. Bread 2. Soup 3. Bread potato 4. Fresh vegetable 5. Frozen vegetable 2 3 8 9 7 1 q e w 0 5 4 6...

  • Page 10: Installation

    9 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 radi...

  • Page 11: Operations and Functions

    10 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

    11 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

    12 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

    13 3. To remove door parts. Ref no. Part code part name description q’ty remark a01 3517005900 barrier-screen*o pet t0.25 1 a02 3512204300 frame door abs xr-401, h-2938 1 kor-1a1g/h 3512204330 frame door abs xr-401, h-2938 1 kor-1a0a a03 3515202900 stopper hinge *t as kor-121m0a 1 a04 3511711300 doo...

  • Page 15

    14 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

    15 5. To remove control panel parts. Ref no. Part code part name description q’ty remark 3518522100 switch membrane kor-1a1g0a 1 b01 3518522110 switch membrane kor-1a1h0a 1 3518522150 switch membrane kor-1a0a0a 1 b02 3516722300 control panel abs af-345, hfa-700ht 1 kor-1a1g/h 3516722330 control pane...

  • Page 17

    16 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

    17 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

    18 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

    19 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

    20 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

    21 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

    22 (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

    23 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

    24 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. 85 mm(3.5 in.). 3. Place it at ...

  • Page 26

    25 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

    26 wiring diagram.

  • Page 28: Printed Circuit Board

    27 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

    28 mp1 mp2 mesurement point.

  • Page 30

    29 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

    30 2. P.C.B. Circuit diagram.

  • Page 32

    31 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

    32 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 f01 f02 f03 f04 f40 f41 f05 f06 f07 f08 f09 f12 f13 f14 f15 f16 f17 f18 f19 f20 f21 f23 f22 f24 f25 f26 f27 f28 f29 f30 f31 f32 f33 f35 f34...

  • Page 34

    33 ref no part code part name description q'ty a00 3511711200 door as kor-1a1g0a 1 3511711230 door as kor-1a0a0a 1 pkcpswxn00 control panel as kor-1a1g0a 1 b00 pkcpswxp00 contron panel as kor-1a1h0a 1 pkcpswxs00 control panel as kor-1a0a0a 1 f01 3510802500 cabinet secc t0.6 1 f02 7s312x40a1 special ...

  • Page 35

    34 ref no part code part name description q'ty f34 4415a66910 sw micro vp-531a of/szm-v16-fa-61 1 f35 3513720600 laver lock pom 1 f36 3513811700 lock pom 1 f37 3513601500 lamp bl 125v 25w t25 c5a h187 1 f38 7121400612 screw tapping t2s pan 4x16 mfzn 1 f39 3966820200 motor syncro 120v 2w gm-16-12f17 ...

  • Page 36

    686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex: dwelec k28177-8 cable: “daewooelec” printed date: jan. 2003.