Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo KOR KOR-161G0S KOR-161G0S

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KOR-161G0S


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 SAFETY AND PRECAUTIONS

1. FOR SAFE OPERATION
D am age that allow s the m icrow ave energy (that cooks or heats the food) to escape w ill result in poor cooking and m ay cause
serious bodily injury to the operator.
IF A N Y O F TH E FOLLO W IN G CO N D ITIO N S E X IS T, O P E RATO R M U S T N O T US E TH E A P P LIA N C E .
(O nly a trained service personnel should m ake repairs.)
   1) A broken door hinge.
   2) A broken door view ing 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.
N o grease, soil or spatter should be allow ed to build up on these surfaces or inside the oven.
D O N OT ATTE M PT TO O P E R ATE THIS A P P LIA N CE W ITH TH E D O O R O P EN . The m icrow ave oven has concealed sw itches
to m ake sure the power is turned off w hen the door is opened. D o not attem pt to defeat them .
D O N OT ATTE M PT TO S E RV IC E TH IS A P P LIA N C E U N TIL Y O U H AVE R E A D THIS S E RV IC E M A NU A L.

2. FOR SAFE SERVICE PROCEDURES
   1) If the oven is operative prior to servicing, a m icrowave em ission check should be perform ed prior to servicing the oven.
   2) If any certified oven unit is found to servicing, a m icrowave em ission check should be perform ed prior to servicing the oven.
     (a) inform the m anufacturer, im porter or assem bler,
     (b) repair the unit at no cost to the ow ner,
     (c) attem pt to ascertain the cause of the excessive leakage,
     (d) tell the ow ner of the unit not to use the unit until the oven has been brought into com pliance.
   3) If the oven operates with the door open, the service person should tell the user not to operate the oven and contact the
      m anufacturer im m ediately.


IMPORTANT

        The w ire in this m ains lead coloured in accordance w ith the following code.

        G reen-and-yellow : E arth
        B lue             : N eutral
        B row n           : Live

        A s the colours of the w ires in the m anins lead of this appliance m ay not correspond w ith the coloured m arkings
        identifying the term inals in your plug, proceed as follow s.
        The w ire which is coloured green-and-yellow m ust be connected to the term ianl in the plug w hich is m arked w ith the
        letter `E ', earth sym bol or coloured green-and-yellow.
        The w ire which is coloured blue m ust be connected to the term inal w hich is m arked w ith the letter `N ' or
        coloured black.
        The w ire which is coloured brow n m ust be connected to the term inal w hich is m arked w ith the letter `L' or
        coloured red.




NOTE
        This oven is designed for counter-top use only.



                                                                   
SPECIFICATIONS


M ODEL                                               KO R -161G /161H
P O W E R S U P P LY                                 230V ~50H z, S ING LE PH A S E W IT H E A RT H ING
POW ER                            M IC R O W AV E    1400W
C O N S U M PT IO N
                                  G RILL
                                  C O M B INATIO N
M IC R O W AV E EN E R G Y O U TP U T                1000W
M IC R O W AV E FR E Q U EN C Y                      2450M Hz
O UT S ID E D IM EN S IO NS (W X H X D)              589 x 339 x 464 m m (23.2 x 13.3 x 18.3 in.)
C AV IT Y D IM E N S IO N S (W X H X D )             399 x 274 x 426 m m (15.7 x 10.8 x 16.8 in.)
N ET W E IG H T                                      AP P R O X. 19.5 Kg ( 43.0 lbs.)
T IM E R                                             99 m in. 99 sec.
F UN C T IO N S E LE C T IO N S                      M IC R O W AV E
P O W E R S E LE CT IO N S                           10 LE V ELS
C AV IT Y V O LU M E                                 1.6 C u.Ft.


  SPECIFICATIONS ARE SUBJECT TO CHANGE W ITHOUT NOTICE.




                                                             
EXTERNAL VIEW
1. OUTER DIMENSION




                     
                                                                                                            EXTERNAL VIEW



2. FEATURE DIAGRAM




1. DOOR SEAL
Door seal m aintains the m icrowave within the oven cavity and prevents m icrowave leakage.

2. DOOR HOOK
W hen door is closed, it will autom atically lock shut. If door is opened while oven is operating, m agnetron tube w ill im m edi-
ately stop operating.

3. DOOR SCREEN
Allows viewing of food. M icrowave cannot pass through perforations in screen.

4. SPATTER SHIELD
Protects the m icrowave outlet from splashes of cooking foods.

5. OVEN LAMP
Autom atically turns on during oven operating.

6. SAFETY INTERLOCK SYSTEM

7. CONTROL PANEL

8. GLASS COOKING TRAY
M ade of special heat resistant glass. The tray m ust always be in proper position before operating. Do not cook food directly
on the tray..

9. OVEN FRONT PLATE

10. DOOR OPENING BUTTON
To open the door, push the door opening button. W hen door is closed, it will autom atically lock shut. If door is opened while
oven is operating, m agnetron tube will im m ediately stop operating.

11. ROLLER GUIDE
Supports the glass cooking tray.

                                                                 
 EXTERNAL VIEW



3. CONTROL PANEL
  - KOR-161G0S




1. Time set pad - Used to set the cooking tim e and the present tim e.

2. Display - Cooking tim e, power level, indicators and present tim e 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 tim e to cooking.

6. Less - Used to rem ove tim e from cooking.

7. Auto Defrost - Used to defrost foods.(for weight)

8. Power - Used to set power level.

9. Defrost - Used to defrost foods.(for tim e)

10. Kitchen Tim er - Used as a m inute tim er, delay cooking, hold setting after cooking.

11. Clock - Used to set clock.

12. Stop/Clear - Used to stop the oven operation or to delete the cooking data.

13. Start/Speedy cook - Used to start the oven and also used to set a reheat tim e.

                                                               
                                                                                          EXTERNAL VIEW



  - KOR-161H0S




1. Time set pad - Used to set the cooking tim e and the present tim e.

2. Display - Cooking tim e, power level, indicators and present tim e are displayed.

3. One touch - Used to cook or reheat specific quantities of food.

4. More - Used to add tim e to cooking.

5. Less - Used to rem ove tim e from cooking.

6. Auto Defrost - Used to defrost foods.(for weight)

7. Power - Used to set power level.

8. Defrost - Used to defrost foods.(for tim e)

9. Kitchen Timer - Used as a m inute tim er, delay cooking, hold setting after cooking.

10. Clock - Used to set clock.

11. Stop/Clear - Used to stop the oven operation or to delete the cooking data.

12. Start/Speedy cook - Used to start the oven and also used to set a reheat tim e.



                                                               
 INSTALLATION
1. Steady, flat location
   This m icrow ave oven should be set on a steady, flat surface.
   This m icrow ave oven is designed for counter top use only.

2. Leave space behind and side
   A ll air vents should be kept a clearance. If all vents are covered during operation, the oven m ay overheat and, eventually,
   cause failure.

3. A w ay from radio and TV sets
   Poor television reception and radio interference m ay 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. A w ay from heating appliances and w ater taps
   K eep the oven aw ay from hot air, steam or splash w hen choosing a place to position it, or the insulation m ight be adversely
   affected and breakdow ns occur.

5. Power supply
     C heck your local pow er source.
      This m icrow ave oven requires a current of approxim ately 6 am peres, 230 Volts, 50 H z.
     P ow er supply cord is about 0.8 m eters long.
     The voltage used m ust be the sam e as specified on this oven. U sing a higher voltage m ay result in a fire or other accident
      causing oven dam age. U sing low voltage will cause slow cooking. W e are not responsible for dam age resulting from use
      of this oven w ith a voltage of am pere fuse other than those specified.
     This appliance is supplied w ith cable of special type, w hich, if dam aged, m ust be repaired w ith cable of sam e type.
      S uch a cable can be purchased from DA E W O O and m ust be installed by a Q ualified P erson.

6. Examine the oven after unpacking for any dam age such as:
   A m isaligned door, broken door or a dent in cavity.
   If any of the above are visible, D O N OT IN S TA LL, and notify dealer im m ediately.

7. D o not operate the oven if it is colder than room temperature
   (This m ay occur during delivery in cold w eather.) Allow the oven to becom e room tem perature before operating.



        EARTHING INSTRUCTIONS

   This appliance m ust be earthed. In the event of an electrical short circuit, earthing reduces the risk of the electric shock by
   providing an escape w ire for the electric current. This appliance is equipped with a cord having a earthing wire with a earthing
   plug. The plug m ust be plugged into an outlet that is properly installed and earthed.


 WARNING
        Im proper use of the earthing plug can result in a risk of electric shock. Consult a qualified electrician or servicem an if
        the earthing instructions are not com pletely understood, or if doubt exists as to w hether the appliance is properly
        earthed, and either : If it is necessary to use an extension cord, use only a 3-w ire extension cord that has a 3-blade
        earthing plug, and a 3-slot receptacle that w ill accept the plug on the appliance. The m arked rating of the extension
        cord should be equal to or greater than the electrical rating of the appliance, or D o not use an extension cord.




                                                                       
 OPERATIONS AND FUNCTIONS
1. Connect the m ain 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 m ust always
   be in place during cooking.
3. Close the door securely.
4. The oven door can be opened at any tim e during operation by touching the door release button on the control panel.
   The oven will autom atically shut off. To restart the oven, close the door and then touch START.
5. Each tim e a pad is touched, a BEEP will sound to acknowledge the touch.
6. The oven autom atically cook on full power unless set to a lower power level.
7. The display will show :0 when the oven is plugged in.
8. Tim e clock returns to the present tim e when the cooking tim e ends.
9. W hen the STOP/CLEAR pad is touched during the oven operation, the oven stops cooking and all inform ation retained.
      To erase all inform ation (except the present tim e), touch the STOP/CLEAR pad once m ore. If the oven door is opened
      during the oven operation, all inform ation is retained.
10. If the START pad is touched and the oven does not operate, check the area between the door and door is closed
      securely. The oven w ill not start cooking under the door is com pletely closed or the program has been reset.




       M ake sure the oven is properly installed and plugged into the electrical outlet.



W attage output chart
The power level is set by pressing the PO W ER pad. The chart shows the display, the power level and the percentage of
power.

      Touch PO WER pad.                  Pow er level (Display)                  Approximate Percentage of Pow er
               O nce                               P -H I                                      100 %
              Tw ice                               P -90                                        90 %
              3 tim es                             P -80                                        80 %
              4 tim es                             P -70                                        70 %
              5 tim es                             P -60                                        60 %
              6 tim es                             P -50                                        50 %
              7 tim es                             P -40                                        40 %
              8 tim es                             P -30                                        30 %
              9 tim es                             P -20                                        20 %
             10 tim es                             P -10                                        10 %
             11 tim es                             P -00                                         0%




                                                                 
 DISASSEMBLY AND ASSEMBLY
- Cautions to be observed when trouble shooting.

Unlike m any other appliances, the m icrowave oven is high-voltage, high-current
equipm ent. It is com pletely safety during norm al 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 rem ove 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 com ponents or wiring.

  1) Check the earthed.
     Do not operate on a two-wire extension cord.
     The m icrowave oven is designed to be used
     with earthed. It is im perative, therefore, to m akes
     sure it is grounded 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 rem ains in the high voltage capacitor.
     W hen replacing or checking parts, short between oven chassis
     and the negative high term inal of the high voltage capacitor, by
     using a properly insulated screwdriver to discharge.

4. W hen the 12A fuse is blown out due to the operation of the m onitor
   switch; replace prim ary interlock switch, secondary interlock switch
   and interlock m onitor switch.
5. After repair or replacem ent of parts, m ake sure that the screws are
   properly tightened, and all electrical connections are tightened.
6. Do not operate without cabinet.


 CAUTION
       S ervice personnel should rem ove their w atches w henever working close to or replacing the m agnetron.




CAUTION
     W hen servicing the appliance, need a care of touching or replacing high potential parts because of electrical
     shock or exposing m icrovave. These parts are as follows - HV Transform er, M agnetron, HV Capacitor, HV Diode,
      HV Fuse.




                                                               

                                                                                         DISASSEMBLY AND ASSEMBLY



1. To remove cabinet

  1) Rem ove three screws on cabinet back.
  2) Push the cabinet backward.




2. To remove door assem bly

  1) Rem ove two screws which secure the stopper hinge top.
  2) Rem ove the door assem bly from top plate of cavity.
  3) Reverse the above for reassem bly.




NOTE
      A fter replacing the door assem bly, perform a check of correct alignm ent with the hinge and cavity front plate.




                                                                
 DISASSEMBLY AND ASSEMBLY



3. To remove door parts.




  REF. NO        PA RT CODE                   PART N AME                   DESCRIPTION      Q TY   REMARK
    A 01         3517005300        BA R R IER -S C RE E N *O        PMMA                     1
    A 02         3512203900        FR A M E D O O R                 A BS                     1
    A 03         3515202900        ST OP P E R H IN G E *T A S      K O R -121M 0A           1
    A 04         3511710500        DO O R PA IN T IN G A S          K O R -161H 0A           1
    A 05         3517005200        BA R R IER -S C RE E N *I        P O LY E S T ER T 0.1    1
    A 06         3512301800        GA S K E T D O O R               PP                       1
    A 07         3513100900        HO O K                           POM                      1
    A 08         3515101300        SP R IN G H O O K                PW1                      1

  1) Rem ove   the gasket door from door plate.
  2) Rem ove   the barrier screen inner from door plate.
  3) Rem ove   the door fram e from door plate.
  4) Rem ove   the stopper hinge top from door plate.
  5) Rem ove   the spring and the hook.
  6) Rem ove   the barrier screen outer from door fram e.
  7) Reverse   the above steps for reassem bly.




                                                                 
                                                                                       DISASSEMBLY AND ASSEMBLY



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.
  3) To reduce gap located on part `C'.
     Loosen a screw on interlock switch assem bly located top of oven body.
     Draw the interlock switch assem bly inward as possible to engage with hook on the door bottom .
     Tighten a screw.
  4) To reduce gap located on part `D'.
     Loosen a screw on interlock switch assem bly located bottom of oven body.
       and (4) are sam e as step (3).



NOTE

      A sm all gap m ay be acceptable if the m icrow ave leakage does not exceed 4m W /cm 2 .




                                                               
 DISASSEMBLY AND ASSEMBLY



5. To remove control panel parts.




  REF.NO        PART CODE               PART NAM E                     DES CRIPTION           QTY          REM ARK
    B 01        3518521800       S W ITC H M E M B R AN E       K O R -161G 0S                 1
                3518521810       S W ITC H M E M B R AN E       K O R -161H 0S                 1
    B 02        3516719100       C O NT R O L-PAN E L           A BS                           1
    B 03        3514317610       P C B M A IN AS                K O R -161H 0S                 1
    B 04         7122401211      S C R EW TA P PIN G            T 2S T R S 4x12 M F Z N        4
    B 05        3513702800       LE V ER D O O R O P EN         A BS X R -401 H -2938          1
    B 06        441G 430171      S P R IN G B UT TO N           S W P D IA 0.7                 1
    B 07        3516907100       B U T TO N D O O R O PE N      A BS                           1



  1) Remove the screw which secure the control panel, push up two snap fits and draw forward the control panel assem bly.
  2) Rem ove the door open lever from the control panel.
  3) Rem ove four screws which secure the PCB assem bly to control panel.
  4) Disconnect m em brane tail from the connector of the PCB assem bly.
  5) Detach m em brane from the control panel.
  6) Rem ove door open button and button spring from the control panel.
  7) Reverse the above steps for reassem bly.




                                                             
                                                                                         DISASSEMBLY AND ASSEMBLY



6. To remove high voltage capacitor.

  1) Rem ove a screw which secure the grounding ring term inal
     of the H.V.diode and the capacitor holder.
  2) Rem ove the H.V. diode from the capacitor holder.
  3) Reverse the above steps for reassem bly.




 High voltage circuit wiring




7. To remove magnetron.

  1) Rem ove a screw which secure the m agnetron.
  2) Rem ove the m agnetron.
  3) Reverse the above steps for reassem bly.




NOTE
      N ever install the m agnetron w ithout the m etallic gasket plate w hich is packed w ith each m agnetron to prevent
      m icrow ave leakage. W henever repair w ork is carried out on m agnetron, check the m icrow ave leakage. It shall
      not exceed 4m W /cm 2 for a fully assem bled oven with door norm ally closed.




                                                                
 DISASSEMBLY AND ASSEMBLY



8. To remove wind guide assembly.

  1) Rem ove a screw for earthing.
  2) Rem ove the noise filter from the wind guide.
  3) Rem ove a screw which secure the wind guide assem bly.
  4) Draw forward the wind guide assem bly.
  5) Pull the fan from the m otor shaft.
  6) Rem ove two screws which secure the m otor shaded pole.
  7) Rem ove the m otor shaded pole.
  8) Reverse the above steps for reassem bly.




9. To remove H.V.transformer.

  1) Rem ove four screws holding the H.V.transform er.
  2) Rem ove the H.V.transform er.
  3) Reverse the above steps for reassem bly.




                                                         
 INTERLOCK MECHANISM AND ADJUSTMENT
The door lock m echanism is a device which has been specially designed to com pletely elim inate m icrowave radiation when
the door is opened during operation, and thus to perfectly prevent the danger resulting from the leakage of microwave.




(1) Prim ary interlock switch
    W hen the door is closed, the hook locks the oven door. If the door is not closed properly, the oven will not operate.
    W hen the door is closed, the hook pushes the button of the m icroswitch. Then the button of the primary interlock switch
    bring it under ON condition.

(2) Secondary interlock switch and interlock m onitor switch
    W hen the door is closed, the hook pushes the lock lever downward. The lock lever presses the button of the interlock
    m onitor switch to bring it under NO condition and presses the button of the secondary interlock switch to bring it under
    ON condition.

 ADJUSTMENT
    Interlock m onitor switch
    W hen the door is closed, the interlock m onitor sw itch should be changed(NO condition) before other switches are closed.
    W hen the door is opened, the interlock m onitor sw itch should be changed(NC condition) after other switches are opened.


(3) Adjustm ent steps
    a) Loosen the two m ounting screws.
    b) Adjust interlock switch assem bly position.
    c) M ake sure that lock lever m oves sm oothly after adjustm ent is com pleted.
    d) Tighten com pletely two m ounting screws.

NOTE
      M icrow ave em ission test should be perform ed after adjusting interlock m echanism . If the m icrow ave em ission exceed
      4m W /cm 2 , readjust interlock m echanism .

                                                                
 TROUBLE SHOOTING GUIDE
Following the procedure below to check if the oven is defective or not.

1) Check earthing before trouble checking.
2) Be careful of the high voltage circuit.
3) Discharge the high voltage capacitor.
4) W hen checking the continuity of the switches, fuse or high voltage transform er, disconnect one lead wire from these parts
   and check continuity with the AC plug removed. To do otherwise m ay result in a false reading or dam age to your meter.

NOTE
      W hen electric parts are checked, be sure the pow er cord is not inserted the w all outlet.
      C heck w ire harness, w iring and connected of the term inals and power cord before check the parts listed below.



(TROUBLE 1) Oven does not operate at all : any inputs can not be accepted.



   C O N D ITIO N                  CHECK                        RESULT                    CAUSE                   REM EDY

   Fuse blow s.            C heck co ntinuity of                                        M alfunction               R eplace
                           interlock m onitor sw itch            C ontinuity            of interlock               N O TE 1

                                   
                           w ith door closed                                              m on itor
                           (C O M     N C)                                                 sw itch
                                                               N o C ontinuity



                          C heck co ntinuity of both          N o C ontinuity         M alfunction of              R eplace
                          prim ary and secondary                                      interlock sw itch            N O TE 1
                          interlock sw itch w ith door
                          colosed                               C ontinuity



                          C heck co ntinuity of prim ary        C ontinuity           S horted contacts            R eplace
                          interlock sw itch contact                                   of prim a ry                 N O TE 1
                          w ith door partially open                                   interlock sw itch.
                          until interlock m onitor switch
                          contact close
                          (C O M <->N O )


                             C heck co ntinuity of             0  or infinite          D efective low              R eplace
                            prim ary w inding of low                                       voltage
                             voltage transform er                A pprox.               transform er
                                                                 150~310
                                                                 (norm al)



                         D isconne ct high voltage             Fuse again            D efective high               R eplace
                         fuse and operate the unit               blows               voltage transform er




                                                               
                                                                                            TROUBLE SHOOTING GUIDE




  CON DITION                       CHECK                          RESULT                    CAUSE                   REM EDY

    O utlet has               C heck con tinuity of                   No                   D efective                R eplace
  proper voltage                  m agn etron                     C ontinuity              m agn etron
  Fuse does not
       blow.                  C heck con tinuity of                   No                                              R eplace
                                                                                         D efective line
                               noise filter board                 C ontinuity             filter board

                             C heck con tinuity of                    No                  O pen pow er               R eplace
                             pow er supply cord                   C ontinuity             supply cord

                                                                   N orm al             D efective touch              A djust
                                                                                         control circuit



NOTE
      A ll these sw itches m ust be replaced at the sam e tim e, please refer to "Interlock M echanism A nd Adjustm ent".



( TROUBLE 2 ) Display shows all figures selected, but oven does not start cooking, even though desired program and tim e
             are set and start pad is tapped.



  CON DITION                       CHECK                         RESULT                     CAUSE                   REM EDY

   Turn table                C heck continuity of                    No                   M alfunction               A djust or
   m otor, and             prim ary interlock sw itch            C ontinuity               of prim ary               R eplace
  oven lam p do                                                                         interlock sw itch
   not turn on

                             C heck continuity of                    No                    M alfunction              A djust or
                          secondary interlock sw itch            C ontinuity              of secondary               R eplace
                                                                                        interlock sw itch


                             C heck D .C. voltage                    0V                    D efective                R eplace
                              being supplied to                                          touch control
                              R ELAY (R Y2) coil                                             circuit

                                                                   A pprox                    Faulty                 R eplace
                                                                   15 VD C                 contacts of
                                                                                             R ELAY
                                                                                         (RY 2) or open
                                                                                            relay coil




                                                                
 TROUBLE SHOOTING GUIDE



( TROUBLE 3 ) No m icrowave oscillation even though fan m otor rotates.

    C O N D ITIO N                   CHECK                    R E S U LT          CAUSE          REM EDY

    N o m icrow ave        C he ck co ntin uity o f high    N o C on tinuity
       oscilla tion               vo ltag e fu se



                           R ep la ce high volta ge fuse


                           C he ck co ntin uity o f high     C ontinuity          D efective     R eplace
                               vo ltag e cap acitor                             high vo ltage
                             term in als w ith w ire s                          tran sform er
                                     rem oved


                           C he ck co ntin uity o f high    C ontinuity in       D efective      R eplace
                               vo ltag e rectifier in        backw ard          high vo ltage
                            forw ard a nd ba ckw a rd         dire ctio n          rectifier
                               direction w ith D C
                                     m eg ge r


                           C on nect m eg ger lea ds to      C ontinuity        D efective       R eplace
                            m ag ne tro n te rm inal and                        m agn etron
                                m ag ne tro n bod y


                             C he ck resistan ce of          0  or                D efective     R eplace
                            prim ary a nd se con dary                           high vo ltage
                              co il of h ig h voltage                           tran sform er
                                   tra nsfo rm er


                             C he ck co ntin uity o f            No             D efective       R eplace
                            m ag ne tro n w ith w ire s      C ontinuity        m agn etron
                                   rem oved


                               C he ck co ntin uity o f          No               D efective     R eplace
                           filam e nt term in al o f high    C ontinuity        high vo ltage
                              vo ltag e transfo rm e r                          tran sform er


                              C he ck D .C . volta ge             0V             D efective      R eplace
                               be in g sup plie d to                           touch control
                               R EL AY (R Y1 ) co il                               circuit

                                                                A pp rox           Fau lty       R eplace
                                                                15 V D C        co nta cts or
                                                                                  R E LAY
                                                                               (RY 1) or o pen
                                                                                 rela y coil




                                                            

                                                                                              TROUBLE SHOOTING GUIDE



( TROUBLE 4 ) The following visual conditions indicate a probable defective touch control circuit or m em brane switch
             assem bly

1. Incom plete segm ents,
   1) Segm ents m issing.
   2) Partical segm ents m issing.
   3) Digit flickering other than norm al display slight
      flickering.
   4) " : 0 " does not display when power is on.

2. A distinct change in the diplay are not on when they
   num bers is the display.

3. One or m ore digits in the diplay are not on when they should be.

4. Display indicates a num ber different from one touched.

5. Specific num bers (for exam ple 2 or 3) will not display when the panel is touched.

6. Display does not count down or up with tim e cooking or clock operation.

7. Oven is program m able and cooks norm ally but no display shows.

8. Display obviously jum ps in tim e while counting down.

9. Display counts down noticeably too fast while cooking.

10. Display does not show the tim e of day when clear pad is touched.

11. Oven lam p and turntable m otor do not stop although cooking is finished. Check if the RELAY 2 contacts close if they are
    close, replace touch control circuit.


  CON DITION                        CHECK                          RESULT                    CAUSE                    REM EDY

                              C heck each pad for                    N orm al              M alfunction               R eplace
   D isplay does
                                continuity of the                                            of touch                control box
      not show                m em brane keyboard
   program m ing                                                                          control circuit           sub-a ssem bly
                                for the follow ing
   at all, even if                                                                        of control box
                                keyboard check
    keyboard is                    proce dure                                             sub-a ssem bly
      touched.

                                                                   A bnorm al             M alfunction of            R eplace the
                                                                                          the m em brane             m em brane
                                                                                             keyboard                 keyborad



NOTE
      B efore following the particular steps listed above in the trouble shooting guide for the m em brane keyborad's, failure,
      please check for the continuity of each wire-harness betw een the m em brane keyboard and P.C.B . assem bly.



                                                                  
 MEASUREMENT AND TEST
1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT

M icrowave output power can be checked by indirectly m easuring the tem perature rise of a certain am ount of water exposed
to the m icrowave as directed below.

PROCEDURE
1. M icrowave power output m easurem ent is m ade wit the m icrowave oven supplied at rated voltage and operated at its
   m axim um m icrowave power setting with a load of 1000 



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