Lincoln Electric SVM146-A service manual Table F.3 Capacitor Voltages

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F-19 F-19

TROUBLESHOOTING & REPAIR

PRIMARY POWER BOARD RESISTANCE TEST AND

CAPACITOR VOLTAGE TEST (continued)

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6.Check for the appropriate voltages outlined in Table F.3.

NOTE: Voltages may vary with the input line voltage.

NOTE: If the capacitor voltage is too high (over 400 VDC) or too low (less than 220 VDC) the control board will deactivate relay CR1 + CR2. This will prevent output.

7.If the test voltages do not meet the expect- ed values as listed in Table F.3, the capaci- tors or other components on the power board may be faulty. Replace.

NOTE: If the capacitor voltages are NOT bal- anced within 20 VDC, the capacitors may need “conditioning.” See the Maintenance section.

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TABLE F.3 - CAPACITOR VOLTAGES

	EXPECTED VOLTS
	DC AT CAPACITOR
INPUT APPLIED	TERMINALS
460VAC	325VDC
440VAC	311VDC
415VAC	293VDC
380VAC	269VDC

NOTE: If Capacitor C1 is found to be defective, both Capacitors C1 and C2 must be replaced at the same time. The capacitors must be replaced in matched sets.

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