Component Test Procedure
5-9
CAUTIONS
1. DISCONNECT THE POWER SUPPLY CORD FROM THE OUTLET WHENEVER REMOVING THE OUT
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 5)
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)
1. Measure the resistance.
(Multi-meter scale: R X 1)
• Primary winding Approx: 1.4 Ω
• Secondary winding Approx: 90 Ω
• Filament winding Less than: 0.1 Ω
2. Measure the resistance.
(Multi-meter scale: R X 1000)
• Primary winding to ground Normal: ∞.
• Filament winding to ground Normal: ∞.
MAGNETRON 1. Measure the resistance.
(Wire leads removed) (Multi-meter scale: R X 1)
• Between filament terminals Normal: Less than 1 Ω
2. Measure the resistance.
(Multi-meter scale: R X 1000)
• Filament to chassis. Normal:
∞.
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