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Daewoo KOR-1A1G0A Service Manual

Other manuals for KOR-1A1G0A: Service Manual

Summary of KOR-1A1G0A

  • Page 1

    Service manual microwave oven model: kor-1a1g0a kor-1a1h0a kor-1a1g1a kor-1a1h1a kor-1a1g2a kor-1a1h2a kor-1a1g4a kor-1a1h4a kor-1a4g0a kor-1a4h0a kor-1a4h1a http : //svc.Dwe.Co.Kr jun. 2000 daewoo electronics co., ltd. S/m no. : r1a1g0a003.

  • Page 2: Table of Contents

    1 table of contents safety and precautions ........................................................................................................ 2 1. For safe operation ............................................................................................................. 2 2. For safe serv...

  • Page 3: Safety and Precautions

    2 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 trai...

  • Page 4: Specifications

    3 specifications 1) kor-1a1g/h ¢À specifications are subject to change without notice. 2) kor-1a1g/h model kor-1a1g(h)0a/1a kor-1a1g(h)2a/4a power supply 120v~60hz, single phase with grounding power consumption microwave 1400w 1500w grill combination microwave energy output 1000w 1100w microwave fre...

  • Page 5: External View

    4 external view 1. Outer dimension 1) kor-1a1g(h) 2) kor-1a4g(h).

  • Page 6

    5 external view 2. Feature diagram 1) kor-1a1g/h 1. Door seal door seal surfaces prevent microwave escaping from the oven cavity. 2. Door hook when the door is closed, it will automatically lock shut. If the door is opened while oven operating, the magnetron tube will immediately stop operating. 3. ...

  • Page 7

    6 2) kor-1a4g/h 1. Door seal door seal maintains the microwave within the oven cavity and prevents microwave leakae. 2. Door hook when the door is closed, it will automatically lock shut. If the door is opened while oven operating, magnetron tube will immediately stop operating. 3. Door screen allow...

  • Page 8

    7 3. Control panel 1) kor-1a1g/kor-1a4g 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....

  • Page 9

    8 2) kor-1a1h/kor-1a4h 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. More - used to add time to cooking. 5. Less - used to r...

  • 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 overheat and, eventually, cause oven failure. 3. Away from radio and t...

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

  • Page 13

    12 disassembly and assembly 1. To remove cabinet 1) remove three screws on cabinet back. 2) push the cabinet backward. 2. To remove door assembly 1) remove screws which secure the stopper hinge top. 2) remove the door assembly from top plate of cavity. 3) reverse the above for reassembly. After repl...

  • Page 14

    13 3. To remove door parts. 1) kor-1a1g/h 1) remove the gasket door from door plate. 2) remove the barrier screen inner 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 the barrier screen outer fr...

  • Page 15

    14 2) kor-1a4g/h (1) remove the gasket door from door plate. (2) remove the barrier screen inner 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 the barrier screen outer from door frame. (7) ...

  • Page 16

    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’ loosen two scr...

  • Page 17

    16 5. To remove control panel parts. 1) kor-1a1g/h 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 thee control panel. 3) remove four screws which secure the pcb assembly to control panel. 4) di...

  • Page 18

    17 2) kor-1a4g/h 1) remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assembly. 2) remove four screws which secure the pcb assembly to control panel. 3) disconnect membrane tail from the connector of the pcb assembly. 4) detach membrane from th...

  • Page 19

    18 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...

  • Page 20

    19 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 21

    20 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) kor-1a1g/h 2) kor-1a4...

  • Page 22: Trouble Shooting Guide

    21 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 23

    22 trouble shooting guide condition check result cause remedy outlet has proper voltage fuse does not blow. Check continuity of magnetron no continuity defective magnetron replace display do not shown countdown no continuity normal defective touch control circuit open power supply cord malfunction o...

  • Page 24

    23 (trouble 3) no microwave oscillation even though fan motor rotates. Trouble shooting guide condition check result continuity continuity in backward direction 0 Ω or infnity no continuity no continuity 0 v appro x 15 vdc cause defective high voltag transformer defective high voltag rectifier defec...

  • Page 25

    24 (trouble 4) the following visual conditions indicate a profective 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 display when power is o...

  • Page 26: Measurement and Test

    25 measurement 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 ...

  • Page 27

    26 measurement and test 2. Microwave radiation test procedures 1. Prepare microwave energy survey, 600cc glass beaker, and glass thermometer 100 (212 ) 2. Pour 275cc 15cc of tap water initially at 20 5 (68 9 ) in the 600cc glass breaker with an inside diameter of approx. 95mm(3.5in.). 3. Place it at...

  • Page 28

    27 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 i...

  • Page 29: Wiring Diagram

    28 wiring diagram 1) kor-1a1g(h)0a/kor-1a4g(h)0a.

  • Page 30

    29 2)kor-1a1g(h)1a / kor-1a4h1a wiring diagram g n l l fu se fi lt er a ss 'y n n br (b k) g e( g n ) bl (w h ) sw it c h w h n o n c c o m n o n c c o m w h sw it c h la m p w h r d g y g y r d bk bk bk in te r lo c k m o n it o r s w it c h r d th er m o st at g n r l r d w h bl g n r el ay -1 r e...

  • Page 31

    30 3)kor-1a1g(h)2a wiring diagram r d g y g y g y sw it c h m o n it o r in te r lo c k th er m o st at o ve n m g t th er m o st at r d sw it c h w h 3 n o n c c o m w h sw it c h la m p w h r d g y r d bk bk bk g n r l r d w h bl g n r el ay -1 r el ay -2 c o n tr o l p. W .B . A ss 'y n eu tr al ...

  • Page 32

    31 4)kor-1a1g(h)4a wiring diagram l l fu se fi lt er a ss 'y n n br (b k) g e( g n ) bl (w h ) g n po w er s u pp ly : si n g le p h as e o n ly r d g y g y g y sw it c h m o n it o r in te r lo c k th er m o st at o ve n m g t th er m o st at sw it c h w h 3 n o n c c o m w h sw it c h la m p w h r...

  • Page 33: Printed Circuit Board

    32 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 terminal voltage load no load 4 - 7 ac 12.6 ac 14....

  • Page 34

    33 printed circuit board measure point.

  • Page 35

    34 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 36

    35 2. P.C.B. Circuit diagram printed circuit board.

  • Page 37

    36 3. P.C.B. Location no no. Name symbol specification part code q’ty 1 buzzer bz1 bm-20k 3515600100 1 2 c array ca1 7p(6) 102m 50v cn4xb-102m 1 3 capacitor elec ec1 16v rss 100uf cexf1c101v 1 4 capacitor elec ec2 25v rss 1000uf cexf1e102v 1 5 connector wafer cn1 yw396-02av 3519150520 1 6 connector ...

  • Page 38: Exploded View and Parts List

    37 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 1) kor - 1a1g/h f49 f48 f50 f51 f40 f03 f10 f34 f37 f11 f32 f35 f33 f36 f31 f25 f26 f27 f28 f29 f30 f22 f23 f24 f19 f18 f20 f21 f12 f46 f...

  • Page 39

    38 exploded view and parts list (1) kor-1a1g/h ref.No. Part code part name description q’ty remark a00 3511711200 door as kor-1a1g0a 1 b00 pkcpswxn00 control-panel as kor-1a1g0a 1 1a1g0a / -1a pkcpswxp00 control-panel as kor-1a1h0a 1 1a1h0a / -1a pkcpswxy00 control-panel as kor-1a1g2a 1 1a1g2a / -4a...

  • Page 40

    39 exploded view and parts list f30 3512716800 harness main kor-1a1g0a 1 1a1g(h)0a 3512716810 harness main kor-1a1g1a 1 1a1g(h)1a 3512718000 harness main kor-1a1g2a 1 1a1g(h)2a 3512718010 harness main kor-1a1g4a 1 1a1g(h)4a f31 4415a17352 sw micro vp-533a-of spno #187 200g 1 f32 4415a66910 sw micro ...

  • Page 41

    40 exploded view and parts list (2) kor-1a4g/h f48 f47 f12 f13 f14 f15.

  • Page 42

    (2) kor-1a4g/h ref.No part code part name description q'ty remark a00 3511711220 door as kor-14ag0a 1 b00 pkcpswxq00 control-panel as kor-1a4g0a 1 pkcpswxr00 control-panel as kor-1a4h0a 1 1a4h0a/1a f01 3510802500 cabinet pcm t0.6 1 f02 3516004100 special screw t1 trs lr4 pole 4*10 se mfzn 3 f03 3516...

  • Page 43

    Ref.No part code part name description q'ty remark f35 3513811710 lock pom black 1 f36 3513601500 lamp bl 125v 25w t25 c5a h187 1 f37 7121400611 screw tapping t2s pan 4x6 mfzn 1 f38 3966820200 motor syncro 120v 2w gm-16-12g17 1 f39 3518905400 thermostat off:90 on:60 h#187 nb 1 1a4g(h)0a 3518905600 t...

  • Page 44

    Daewoo electronics co., ltd 686, ahyeon-dong mapo-gu seoul, korea c.P.O. Box 8003 seoul, korea telex : dwelec k28177-8 cable : “daewooelec” fax : 02)360-7877 tel : 02)360-7804 e-mail : g7f00e@web.Dwe.Co.Kr printed date : april. 2000 / /.