Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo KOR KOR-618MQ2S & 619MQ2S KOR-618MQ2S & 619MQ2S

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Service Manual
Microwave Oven
Model: KOR-618M/Q2S
KOR-619M/Q2S

DAEWOO ELECTRONICS CO., LTD.
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 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 microwave power for any service test or inspection within the microwave gernerating
compartments, check the magnetron, wave guide or transmission line, and cavity for proper alignment,
intergrity, and connections.
(d) Any defective or misadjusted components in the interlock, monitor, door seal, and microwave gernera-
tion and transmission systems shall be repaired, or adjusted by procedures described in this manual
before the oven is released to the owner.
(e) A micrewave leakage check to verify compliance with the Federal Performance Standard should be per-
formed on each oven prior to release to the owner.

TABLE OF CONTENTS
PROPER USE AND SERVICE PRECAUTIONS..................................................................................................... 2
SPECIFICATIONS.................................................................................................................................................... 3
FEATURES DIAGRAM ............................................................................................................................................ 4
EARTHING INSTRUCTIONS................................................................................................................................... 5
INSTALLATION ........................................................................................................................................................ 5
OPERATION PROCEDURE .................................................................................................................................... 6
CONTROLS.............................................................................................................................................................. 7
INTERLOCK MECHANISM FUNCTIONS AND ADJUSTMENTS .......................................................................... 22
MEASUREMENT OF THE MICROWAVE OUTPUT POWER................................................................................ 24
MICROWAVE RADIATION TEST............................................................................................................................ 25
WIRING DIAGRAM .................................................................................................................................................. 26
CIRCUIT DESCRIPTION ......................................................................................................................................... 28
SAFETY PRECAUTIONS FOR DISASSEMBLY AND REPAIR ............................................................................. 31
DISASSEMBLY AND ASSEMBLY........................................................................................................................... 32
TROUBLE SHOOTING GUIDE................................................................................................................................ 37
COMPONENT TEST PROCEDURE ....................................................................................................................... 46
SAFETY INTERLOCK CONTINUITY TEST ............................................................................................................ 47
PRINTED CIRCUIT BOARD .................................................................................................................................... 48
CIRCUIT CHECK PROCEDURE ......................................................................................................................... 48
P.C.B. CIRCUIT DIAGRAM.................................................................................................................................. 53
COMPONENT INFORMATION............................................................................................................................ 55
PRINTED CIRCUITS BOARD.............................................................................................................................. 56
P.C.B. LOCATION NO ......................................................................................................................................... 57
EXPLODED AND PARTS LIST ............................................................................................................................... 58

1
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.

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 tok 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 have excessive emission level 5mW/cm2, the service person should:
(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 and CDRH immediately.

2
SPECIFICATIONS

ITEM SPECIFICATION
POWER SUPPLY 230V~50Hz, SINGLE PHASE WITH EARTHING
POWER CONSUMPTION 1200 W
MICROWAVE OUTPUT POWER 800 W (IEC 705)
FREQUENCY 2450 MHz
OUTSIDE DIMENSIONS (W x H x D) 465 x 274 x 352 mm
CAVITY DIMENSIONS (W x H x D) 290 x 200 x 290 mm
NET WEIGHT APPROX. 13.5kg
TIMER 59 min. 99 sec.
MICROWAVE POWER LEVELS 10

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