Garland EM-C180 Test Procedures And Troubleshooting, Primary, Windings, Secondary, Filament

6. TEST PROCEDURES AND TROUBLESHOOTING		PRIMARY
	CAUTION	WINDINGS
-DISCONNECT THE POWER SUPPLY CORD FROM THE WALL		Secondary
OUTLET WHENEVER REMOVING THE CABINET FROM THE UNIT.		Windings
PROCEED WITH TESTS ONLY AFTER DISCHARGING THE HIGH
VOLTAGE CAPACITORS AND REMOVING THE LEAD WIRES ON
THE PRIMARY WINDING OF THE HIGH VOLTAGE TRANSFORM-
ERS FOR LOWER AND UPPER MAGNETRONS.		Filament
(SEE FIGURE 3)
		Windings
A. TEST PROCEDURES		Figure 3
COMPONENT	CHECKOUT PROCEDURE	RESULT
	1) Check for resistance: Across the filament ter-	Normal reading:
MAGNETRON	minal of the magnetron with an ohm - meter	Less than 1 ohm.
	on Rx1 scale.

Figure 4
2) Check for resistance: Between each filament	Normal reading:
terminal of the magnetron and the chassis	Infinite ohms.
ground with an ohm-meter on highest scale.

	Figure 5
	1) Measure the resistance:	Normal reading:
HIGH-VOLTAGE	With an ohm-meter on R x1 scale.
	a. Primary winding;	Approximately 1.0 ohms
TRANSFORMER
	b. Filament winding;	Less than 1 ohm.
	c. Secondary winding;	Approximately 60 ohms
	2) Measure the resistance:	Normal reading:
	with an ohm-meter on highest scale.
	a. Primary winding to ground;	Infinite ohms.
	b. Filament winding to ground;	Infinite ohms.

Figure 6

Note: Remove varnish of measured point.

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