Lincoln Electric SVM 117-A service manual Bank Removal Replacement, Components

F-34 TROUBLESHOOTING & REPAIR F-34

TOC	TOC	CAPACITOR BANK REMOVAL AND REPLACEMENT (CONTINUED)
Section	Master	PROCEDURE	6. Remove the #204 lead from the pos-
				itive buss bar.
		See Figure F.15 for location of Capacitor
to	to		7.	Remove the shunt from the negative
		Bank Removal and Replacement com-
Return	Return
				capacitor bank buss bar using a 1/2"
		ponents.
				socket wrench with a universal tool
				adapter.
				a. Two people may be required to
				remove the shunt. One person
				may have to reach through from
				the left side of the machine to
				keep the bolt in position while
TOC				the other person loosens the
	TOC			nut.
Section	Master		8. Remove the two screws holding the
				capacitor bank to the floor of the
				machine using a 5/16" nut driver.
to	to
Return	Return		9. Clear the leads and carefully
				remove the capacitor bank assem-
				bly from the machine.

		FIGURE F.15 - Location of Capacitor
		Bank Removal		and Replacement
TOC		Components.
	TOC	1. Disconnect main input power to the
Section	Master	2.	Test that the capacitors are dis-
			machine.
to	to	3.	charged using a volt ohmmeter.
Return	Return		Remove the	two transformer sec-
			Polarity must be observed.
			ondary leads (X2 and X3) for the
			negative capacitor bank buss bar
			using two 1/2" open end wrenches.
		4. Remove the output choke lead and
			the heavy lead extending from the
			SCR Rectifier Assembly to the posi-
TOC	TOC		tive capacitor bank buss bar using a
			1/2" open end wrench.
Section	Master
		5. Remove lead #206 and the D1
			diode lead from the negative capac-
to	to		itor bank buss bar using a slot head
			screwdriver	and 3/8" open end
Return	Return
			wrench.
				WIRE-MATIC 250