Daewoo KOR-630A0A, KOR-630A9A, KOR-630A1A service manual Relay RY1

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(TROUBLE 3) No microwave oscillation even though fan motor rotates.

CONDITION

 

 

 

CHECK

 

 

 

RESULT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Continuity

microwave

 

 

 

Check continuity of high

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

oscillation

 

 

 

voltage capacitor terminals

 

 

 

 

 

 

 

 

with wires removed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check continuity of high voltage

 

 

 

Continuity in

 

 

 

 

 

 

 

 

 

 

 

rectifier in forward and backward

 

 

 

backward

 

 

 

 

 

 

 

 

 

 

 

direction with DC megger

 

 

 

direction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Continuity

 

 

 

 

Connect megger leads to mag-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

netron terminal and magnetron

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

body

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 Ω or

 

 

 

 

Check resistance of primary and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

secondary coil of high voltage

 

 

 

 

 

 

 

 

transformer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

Check continuity of magnetron

 

 

 

 

 

 

 

 

 

 

Continuity

 

 

 

 

with wires removed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

Check continuity of filament termi-

 

 

 

 

 

 

 

 

 

 

Continuity

 

 

 

 

nal of high voltage transformer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0 V

 

 

 

 

Check D.C. voltage being sup-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

plied to RELAY (RY1) coil

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12 VDC

 

 

 

 

 

 

 

 

 

CAUSE

Defective high voltage trans- former

Defective high voltage rectifier

Defective mag-

netron

Defective high voltage trans- former

Defective mag-

netron

Defective high voltage trans- former

Defective touch

control circuit

Faulty

contacts or

RELAY (RY1)

or open

relay coil

REMEDY

Replace

Replace

Replace

Replace

Replace

Replace

Replace

Replace

19

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Contents Microwave Oven Table of Contents Safety and Precautions For Safe OperationSpecifications KOR-630A0A, KOR-630A1A KOR-860A0A, KOR-860A1AOuter Dimension External ViewFeature Diagram Control Panel Installation Leave space behind and sideWattage output chart Operations and FunctionsDisassembly and Assembly To remove cabinet REF no Part Code Part Name Description ’TY Remark Part Code Part Name DescriptionPage To remove control panel parts To remove high voltage capacitor To remove wind guide assembly Interlock Mechanism and Adjustment AdjustmentTrouble Shooting Guide Check ResultCheck Relay RY1 Continuity of the membrane Touch Assembly Programming Measurement and Test Measurement of the Microwave Power OutputProcedure Procedures Microwave Radiation TestComponent Test Procedure High voltage transformerWiring Diagram KOR-630A1A/KOR-860A1A Circuit Check Procedure Printed Circuit BoardCheck Point Remark Measure Point Wave Form Remedy RemarkMeasure Point State Point Relay 2 on GNDRelay 2 OFF State Point Relay 1 onPCB Circuit Diagram Name Symbol Specification Part Code QTY C.B. Location noCapacitor Elec EC1 50V RS IMF Wire Copper SJ1,SJ3 TIN Coating Exploded View and Parts List Door AssemblyPart Code Part Name Description QTY CONTROL-PANEL AS KOR-860AOA CONTROL-PANEL AS Total ASSEMBLYKOR-630A1A/860A1A Special Screw T1 TRS 4*10 SE Mfzn KOR-860A1A

KOR-630A0A, KOR-630A1A, KOR-630A9A specifications

The Daewoo KOR-630 series of microwave ovens, including models KOR-630A9A, KOR-630A1A, and KOR-630A0A, represent a blend of innovative technology and user-friendly designs tailored for modern cooking needs. This range positions itself as a reliable choice for households seeking efficiency and performance.

One of the standout features of the KOR-630A9A, KOR-630A1A, and KOR-630A0A is their impressive power output. These models typically offer a microwave power of around 900 watts, ensuring quick heating and cooking times, which is essential for busy lifestyles. This power allows users to defrost, reheat, and cook meals in a fraction of the time compared to conventional methods.

The KOR-630 series incorporates advanced cooking technologies, including multiple power levels. This flexibility allows for precise cooking control, enabling users to select the ideal power output for various tasks, from gentle defrosting to robust cooking. Additionally, the ovens come equipped with various automatic cooking programs designed to simplify meal preparation. These pre-set options take the guesswork out of cooking, making it incredibly convenient for users of all skill levels.

In terms of design, the KOR-630 models boast a sleek and modern aesthetic that complements any kitchen decor. The user-friendly control panel features intuitive buttons and rotary dials, making it easy to navigate settings and adjust cooking times. The interior space is designed with practicality in mind, allowing for the accommodation of larger dishes, and features a durable and easy-to-clean surface.

Another key characteristic of the KOR-630 series is its safety features. Child safety locks are incorporated into the design, providing peace of mind for families with young children. Additionally, the ovens are built with an efficient cooling system, which helps prevent overheating during operation, contributing to both user safety and appliance longevity.

Overall, the Daewoo KOR-630A9A, KOR-630A1A, and KOR-630A0A microwave ovens demonstrate a commitment to quality, performance, and innovation. They succeed in enhancing the cooking experience while prioritizing convenience and safety, making them an excellent addition to any kitchen. Whether for reheating leftovers, defrosting frozen ingredients, or cooking meals from scratch, this series offers versatile solutions that cater to a wide range of cooking needs.