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.: 1.4 ohm
Approx.: 90 ohm
Less than: 1 ohm
Normal: Infinite
Normal: Infinite
Normal: Less than 1 ohm
Normal: Infinite
PRIMARY
TERMINAL
SECONDARY
WINDING
FILAMENT
WINDING
TERMINAL
COMPONENT TEST PROCEDURE
Summary of Contents for MS-269T
Page 9: ...SCHEMATIC DIAGRAM 4 3 ...
Page 29: ...6 2 13720D 13213A 14026A 13552A 15006A 13536A 14970A 13581A WTT028 13650A DOOR PARTS ...
Page 30: ...6 3 383EW1 CONTROL PANEL PARTS ...
Page 31: ...6 4 33052A 33112U WTT010 948503 WTT021 WTP013 36549S 33390G 34370T 35889A OVEN CAVITY PARTS ...
Page 32: ...6 5 WSZ085 56912B 55262A 44510A 466001 43500A 43501A 466003 466001 LATCH BOARD PARTS ...
Page 34: ...6 7 WTT021 63302A 63303A 56170D WSZ002 WTT028 WSZ002 647781 65006A BASE PLATE PARTS ...
Page 40: ...8 1 SCHEMATIC DIAGRAM OF P C B ...
Page 41: ...8 2 PRINTED CIRCUIT BOARD KEY P C B MAIN P C B ...
