-21-
A. TEST PROCEDURES
11. TEST AND CHECKOUT PROCEDURES, AND TROUBLESHOOTING
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.
HIGH VOLTAGE
TRANSFORMER
(Wire leads removed)
MAGNETRON
(Wire leads removed)
1. Measure the resistance.
(Select the
Ω
scale on the meter)
• Primary winding
• Secondary winding
• Filament winding
2. Measure the resistance.
(Select the
Ω
scale on the meter)
• Primary winding to ground
• Filament winding to ground
1. Measure the resistance.
(Select the
Ω
scale on the meter)
• Filament terminal
2. Measure the resistance.
(Select the
Ω
scale on the meter)
• Filament to chassis
Normal: Less than 1 ohm
Normal: Infinite
COMPONENTS
TEST PROCEDURE
RESULTS
FILAMENT
WINDING
PRIMARY
TERMINAL
SECONDARY
WINDING
Approx.: 0.2 ~ 0.4 ohm
Approx.: 50 ~ 90 ohm
Less than: 1 ohm
Normal: Infinite
Normal: Infinite
Summary of Contents for 721.62222300
Page 8: ...6 OVERALL CIRCUIT DIAGRAM A I SCHEMATIC DIAGRAM Check the Model No 7...
Page 9: ...8 A II SCHEMATIC DIAGRAM Check the Model No ADD Noise filter...
Page 10: ...9 B MATRIX CIRCUIT FOR TOUCH KEY BOARD Figure 4...
Page 34: ...33 1003 1001 1000 1006 1007 1004 1005 1013 1002 EV DOOR PARTS...
Page 35: ...34 2000 2002 2001 2381 2006 W106 2003 2005 2007 2004 2010 EV CONTROL PANEL PARTS...
Page 37: ...36 4003 4000 4002 4002 W102 EV LATCH BOARD PARTS...
Page 40: ...39 W101 6002 W109 W108 5008 6000 6001 9001 EV BASE PLATE PARTS...
