5-8
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.
HIGH VOLTAGE
TRANSFORMER
(Wire leads removed)
MAGNETRON
(Wire leads removed)
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
PRIMARY
TERMINAL
FILAMENT
WINDING
COMPONENTS TEST
PROCEDURE RESULTS
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
Summary of Contents for LRM1250W
Page 10: ...SCHEMATIC DIAGRAM 4 4 ...
Page 28: ...6 2 DOOR PARTS 13552A 13213A 13581A 14970A 14026A 13536A 15006A 14890A 13720D 143501 EV ...
Page 29: ...6 3 CONTROLLER PARTS 24781M 23506A 23572A 24510L 24970A 250201 268711 WTP018 EV ...
Page 30: ...6 4 OVEN CAVITY PARTS 33390G WTT010 WSZ185 33112U 35889A 36549S WTP013 33052A 948502 EV ...
Page 31: ...6 5 LATCH BOARD PARTS WSZ085 466001 466003 466001 43500A EV ...
Page 33: ...6 7 BASE PLATE PARTS 56170D WSZ002 WTT021 63302A 65006B 63303A EV ...
Page 34: ......
