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                      S/M No. : OC1B4K0001




 Service Manual
 Microwave Oven
 Model: KOC-1B4K0S
        KOC-1B4K0S01
        KOC-1B4K0S10
        KOC-1B4K0S20
        KOC-1B4K0S31
        KOC-1B4K9SA1
        KOC-1B4K5S
        KOC-1B4K5S10




 Caution
  : In this 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




                                              Dec. 2005
       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.....................................................................................................18
8. TROUBLESHOOTING GUIDE ...................................................................................................................................19
9. MESUREMENT AND TEST .......................................................................................................................................25
  9-1. MEASUREMENT OF THE MICROWAVE POWER OUTPUT ........................................................................25
  9-2. MICROWAVE RADIATION TEST ....................................................................................................................26
  9-3. COMPONENT TEST PROCEDURE................................................................................................................27
  9-4. COMPONENT ACTION....................................................................................................................................28
10. WIRING DIAGRAM...................................................................................................................................................29
11. EXPLODED VIEW AND PARTS LIST ..................................................................................................................31
  11-1. DOOR ASSEMBLY.........................................................................................................................................31
  11-2. CONTROL PANEL ASSEMBLY.....................................................................................................................31
  11-3. TOTAL ASSEMBLY ........................................................................................................................................31
12. PRINTED CIRCUIT BOARD ....................................................................................................................................35
13. P.C.B CIRCUIT DIAGRAM.......................................................................................................................................39




                                                                                     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 microwave 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
                                                KOC-1B4K0S,1B4K0S01,1B4K0S10,         KOC-1B4K5S,1B4K5S10
   MODEL
                                                  1B4K0S20,1B4K0S31,1B4K9SA1
                                                     220~230V~50Hz, SINGLE          220~240V~50Hz, SINGLE
   POWER SUPPLY
                                                     PHASE WITH EARTHING             PHASE WITH EARTHING
                          MICROWAVE                                           1500W
   POWER                  GRILL                                               1600W
   CONSUMPTION            CONVECTION                                          2300W
                          COMBINATION                        3100W                                2300W
   MICROWAVE ENERGY OUTPUT                                                1000W(IEC705)
   MICROWAVE FREQUENCY                                                       2450MHz
   OUTSIDE DIMENSIONS (W X H X D)                             560X344X543mm (22.0X13.5X21.3 in.)
   CAVITY DIMENSIONS (W X H X D)                             368.5X246X376.5mm (14.5X9.7X14.8 in.)
   NET WEIGHT                                                        APPROX. 21.5kg (47.6 lbs.)
   TIMER                                                                    60 minutes
   FUNCTION SELECTIONS                                   MICROWAVE/ GRILL/ CONVECTION/ COMBINATION
   POWER SELECTIONS                                                         10 LEVELS
   CAVITY VOLUME                                                             1.2 Cu. Ft

* Specifications are subject to change without notice.




3. EXTERNAL VIEW
3-1. OUTER DIMENSION




                                                         3
2. FEATURE DIAGRAM




                                                                                                              t




11.DOOR HOOK
   When the door is closed, it will automatically lock shut. If door is opened while oven is operating, the magnetron
   will immediately stop operating.
12.DOOR VIEWING SCREEN
   Allows viewing of food. The screen is designed so that light can pass through, but not the microwave.
13.METAL RACK
14.TOP HEATER
   Turns on when convection, grill and combi cooking is selected.
15.OVEN LAMP
   Automatically turns on during oven operating.
16.SAFETY INTERLOCK SYSTEM
17.CONTROL PANEL
18.TURNTABLE TRAY
   Rotates during cooking and ensure even distribution of Microwaves.
   It can also be used as a cooking utensil.
19.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.
15.BARBECUE BAR(KOC-1B4K0S01, 1B4K0S31, 1B4K9SA1)
   This is used barbecue cooking.


                                                              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
  



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