-19-
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.
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)
MAGNETRON
(Wire leads removed)
1. Measure the resistance.
(Ohm-meter scale: Rx1 and Rx100)
• Primary winding
• Secondary winding
• Filament winding
2. Measure the resistance.
(Ohm-meter scale: Rx1000)
• Primary winding to ground
• Filament winding to ground
1. Measure the resistance.
(Ohm-meter scale: Rx1)
• Filament terminal
2. Measure the resistance.
(Ohm-meter scale: Rx1000)
• Filament to chassis
Approx.: 0.2 ~ 0.4 ohm
Approx.: 70 ~ 100 ohm
Less than: 1 ohm
Normal: Infinite
Normal: Infinite
Normal: Less than 1 ohm
Normal: Infinite
FILAMENT
WINDING
PRIMARY
TERMINAL
11. TEST AND CHECKOUT PROCEDURES, AND TROUBLESHOOTING
A. TEST PROCEDURES
Summary of Contents for 721.66339
Page 9: ...B MATRIX CIRCUIT FOR TOUCH KEY BOARD 8 Figure 4...
Page 32: ...31 DOOR PARTS 1004 1000 1005 1007 1006 1002 1013 1003 1001 EV...
Page 33: ...32 CONTROLLER PARTS 2000 2002 2006 W106 2004 2381 EV...
Page 34: ...33 OVEN CAVITY PARTS 3002 W107 W103 3001 3003 3008 3009 W105 3034 EV...
Page 35: ...34 LATCH BOARD PARTS W102 4002 4003 4002 4004 4000 4001 EV...
Page 37: ...36 BASE PLATE PARTS 5008 W101 W108 6000 6007 6001 EV...
