Fusion F300S, F300SQ Table 22. Transformer Terminal Orientation

2.With an ohmmeter set on the highest scale, measure the resistance between the two outside capacitor terminals and the center terminal. The meter needle should momentarily deflect upward to indicate continuity, and should then return to infinity. Reversing the meter leads should give the same indication.

3.If the ohmmeter indicates continuity between the capacitor terminals at all times (shorted capacitor), or if no meter deflection occurs at all (open capacitor), the capacitor should be replaced.

4.A resistance check between each capacitor terminal and chassis ground should indicate infinite resistance (regardless of meter lead polarity).

High Voltage Transformer Removal/Replacement

CAUTION: To maintain proper polarity, transformers must be installed with terminals in correct locations. Wiring must be reconnected correctly to the terminals from which it was removed.

WARNING: Disconnect all power sources before servicing high voltage components.

1.Disconnect all power, discharge the high voltage capacitors, and disconnect all leads from the transformer terminals.

2.Unbolt the transformer from the power supply chassis.

3.To replace the transformer, reverse the steps, being certain that terminals are in the correct locations. Refer to Table 22, “Transformer Terminal Orientation,” on page 116.

CAUTION: Transformers must be securely mounted to the chassis to provide adequate transformer grounding.

Table 22. Transformer Terminal Orientation

	XFMR	COM	TAP
P300MT	T101	Black/White	Red/White
	T102	Black/White	Red/White

116F300S/F300SQ Ultraviolet Lamp System