Goldstar MA-2005ST service manual Component Test Procedure, Components Test Procedure

COMPONENT TEST PROCEDURE

CAUTIONS

1.DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUTER CASE FROM THE UNIT. PROCEED WITH THE TEST ONLY AFTER DISCHARGING THE HIGH VOLTAGE CAPACITOR AND REMOVING THE WIRE LEADS FROM THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORMER. (SEE PAGE 2-1)

2.ALL OPERATIONAL CHECKS WITH MICROWAVE ENERGY MUST BE DONE WITH A LOAD (1 LITER OF WATER IN CONTAINER) IN THE OVEN.

COMPONENTS TEST PROCEDURE RESULTS

HIGH VOLTAGE TRANSFORMER (Wire leads removed)

FILAMENT ￿ WINDING￿ ￿

SECONDARY ￿

￿

PRIMARY ￿

TERMINAL

1.Measure the resistance. (Ohm-meter scale: Rx1 and Rx100)

¥ Primary winding	Approx.: 0.2 ~ 0.4 ohm
¥ Secondary winding	Approx.: 60 ~ 90 ohm
¥ Filament winding	Less than: 1 ohm
2. Measure the resistance.
(Ohm-meter scale: Rx1000)
¥ Primary winding to ground	Normal: Infinite
¥ Filament winding to ground	Normal: Infinite

MAGNETRON

(Wire leads removed)

1.	Measure the resistance.
	(Ohm-meter scale: Rx1)	Normal: Less than 1 ohm
	¥ Filament terminal
2.	Measure the resistance.
	(Ohm-meter scale: Rx1000)	Normal: Infinite
	¥ Filament to chassis

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