Lincoln Electric SVM140-A Primary Power Board Resistance Test, Capacitor Voltage Test

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F-19 F-19

TROUBLESHOOTING & REPAIR

PRIMARY POWER BOARD RESISTANCE TEST AND

CAPACITOR VOLTAGE TEST (continued)

FIGURE F.3 – PRIMARY POWER BOARD REMOVAL

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PRIMARY POWER

BOARD WITH

INPUT FILTER

CAPACITORS

CAPACITOR (C2)

TERMINALS

	+
207	202
	204
		]
201		-[
		G3172
205	208	PRO-CUT POWER

206 203

+

CAPACITOR (C1) TERMINALS

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TEST PROCEDURE

1.Remove main input power to the Pro-Cut 55.

2.Perform the Input Filter Capacitor Discharge Procedure detailed earlier in this section.

3.Locate the primary power board and asso- ciated lead locations. See Figure F.3.

4.Carefully remove the main transformer pri- mary leads #201, #204, #205 and #208 from the power board.

5.Use the analog ohmmeter to perform the test outlined in Table F.2.

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PRO-CUT 55