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.: 2.5
Ω
Approx.: 110
Ω
Less than: 0.4
Ω
Normal:
∞
Normal:
∞
Normal: Less than 1
Ω
Normal:
∞
PRIMARY
TERMINAL
SECONDARY
TERMINAL
WINDING
FILAMENT
TERMINAL
COMPONENT TEST PROCEDURE
Summary of Contents for MS-1044B
Page 9: ...SCHEMATIC DIAGRAM 4 3 ...
Page 28: ...6 2 13552A 14890A 13213A 13720D 14026A 14970A WTT028 13581A 13536A 13650A DOOR PARTS EV ...
Page 29: ...6 3 268711 24781S WTT028 23572A 23790D 23506A CONTROL PANEL PARTS EV ...
Page 30: ...6 4 WTT011 33052M 36549S 33390G 34370T 35889A 33112U WTP013 WTT010 OVEN CAVITY PARTS EV ...
Page 31: ...6 5 466001 43500A WSZ085 466003 466001 44510A 43501A LATCH BOARD PARTS EV ...
Page 33: ...6 7 56170D 63303A WSZ002 WTT021 63302A 65006B BASE PLATE PARTS EV ...
Page 34: ... 36 ...
