Klasse KOC-154K User manual

Service Manual
Microwave Oven, Convection & Grill
KOC-154K
SEP. 2008

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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

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1. PROPER USE AND SERVICE 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.
CAUTION
MICROWAVE RADIATION
PERSONNEL SHOULD NOT BE EXPOSED TO THE MICROWAVE ENERGY WHICH MAY RADIATE
FROM THE MAGNETRON OR OTHER MICROWAVE GENERATING DEVICE IF IT IS IMPROPERLY
USED OR CONNECTED. ALL INPUT AND OUTPUT MICROWAVE CONNECTIONS. WAVEGUIDES
FLANGES AND GASKETS MUST BE SECURED. NEVER OPERATE THE DEVICE WITHOUT A
MICROWAVE ENERGY ABSORBING LOAD ATTACHED. NEVER LOOK INTO AN OPEN WAVEGUIDE OR
ANTENNA WHILE THE DEVICE IS ENERGIZED.
CAUTION
This device is to be Serviced only by Properly Qualified Service Personel. 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.

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3. EXTERNAL VIEW
2. SPECIFICATIONS
* Specifications are subject to change without notice.
1. OUTER DIMENSION
MODEL KOC-154K9A27
POWER SUPPLY 120V~ 60Hz, SINGLE PHASE WITH EARTHING
MICROWAVE 1550W
POWER GRILL 1450W
CONSUMPTION CONVECTION 1750W
COMBINATION 1750W
MICROWAVE ENERGY OUTPUT 1000W
MICROWAVE FREQUENCY 2450MHz
OUTSIDE DIMENSIONS (W X H X D) 582X379.1X518.2mm (22.9x14.9x20.4 in.)
CAVITY DIMENSIONS (W X H X D) 390X285.5X383mm (15.4x11.2x15.1 in.)
NET WEIGHT Approx. 24Kg (52.9 lbs)
TIMER 60 minutes
FUNCTION SELECTIONS MICROWAVE/ GRILL/ CONVECTION/ COMBINATION
POWER SELECTIONS 10 LEVELS
CAVITY VOLUME 1.5 Cu. Ft

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2. FEATURE DIAGRAM
1. 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.
2. DOOR VIEWING SCREEN
Allows viewing of food. The screen is designed so
that light can pass through, but not the microwave.
3. DOOR SEAL
Door seal maintains the microwave energy within
the oven cavity and prevents microwave leakage.
4. CONVECTION OUTLET & FAN
5. TOP HEATER
Turns on when convection, grill and combi cooking
is selected.
6. UNDER HEATER
7. COUPLER
This fits over the shaft in the center of the ovens
cavity floor. This is to remain in the oven for all
cooking.
8. ROLLER GUIDE
This must always be used for cooking together with
the turntable tray.
9. METAL TURNTABLE TRAY
This is to be used for convection, combination and
grill cooking. It rotates during cooking.
10. GLASS TURNTABLE TRAY
This is to be used for microwave cooking. It rotates
during cooking.
11. METAL RACK (High)
12. METAL RACK (Low)
13. OVEN LAMP
Automatically turns on during oven operating.
14. SAFETY INTERLOCK SYSTEM
15. CONTROL PANEL