5-8
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)
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.: 60 ~ 90 ohm
Less than: 1 ohm
Normal: Infinite
Normal: Infinite
Normal: Less than 1 ohm
Normal: Infinite
FILAMENT
WINDING
PRIMARY
TERMINAL
COMPONENT TEST PROCEDURE
Summary of Contents for NN-S723BL
Page 26: ...P NO 3828W5S2878 Printed in Korea ...
Page 28: ...7 1 SCHEMATIC DIAGRAM OF D P C ...
Page 29: ...7 2 PRINTED CIRCUIT BOARD ...
Page 30: ...6 2 DOOR PARTS 13 18 19 11 15 16 12 EV ...
Page 31: ...6 3 37 39 28 48 CONTROLLER PARTS EV ...
Page 32: ...6 4 OVEN CAVITY PARTS 5 9 10 45 3 8 46 44 EV ...
Page 33: ...6 5 LATCH BOARD PARTS 14 31 43 32 30 EV ...
Page 34: ...6 6 INTERIOR PARTS 2 47 33 41 28 50 21 23 1 42 27 28 29 34 42 49 22 24 36 35 26 42 40 EV ...
Page 35: ...6 7 BASE PLATE PARTS 6 4 28 42 46 25 EV ...
Page 36: ...7 1 SCHEMATIC DIAGRAM OF D P C ...
Page 37: ...7 2 PRINTED CIRCUIT BOARD ...
