Lincoln Electric SVM145-B service manual Pin

F-64 F-64

TROUBLESHOOTING & REPAIR

TOC	TOC			CONTROL INPUT TEST (continued)
to Section	to Master					FIGURE F.30 – PLUG J2
							Pin 2 (-)
Return	Return				COMMANDER 300
			X18		CONTROL
		X13			G3002-1
			X2
		X12
	X11	X10	X4	X19	Q1
			C54
TOC	TOC	X8	X1	X5
Section	Master		C1		C25		Plug J2
to	to		C2
Return	Return	J4	J3	J2	J1
							Pin 6 (+)	Pin 7 (+)

		TEST PROCEDURE					7. Set the Arc Force dial in the min. position, the
		1. Turn the engine off.					Range Selector switch to the CC position, and
							the Control dial to min.
		2. Perform the Case Cover Removal and					8. Short the output studs.
TOC			Replacement Procedure.
	TOC						9. Using a voltmeter, measure 4.378 - 4.648
		3. Tilt the control panel out.
Section	Master						VDC from J2 pin 7 (pos. lead) to J2 pin 2 (neg.
		4.	Locate the J2 connector on the control				lead). Set the Arc Force dial in the max. posi-
			board. See Figure F.30.				tion. Measure 8.352 - 8.868 VDC from J2 pin
to	to	5.	Start the machine.				7 (pos. lead) to J2 pin 2 (neg. lead). The short
							circuit output current should increase as the
Return	Return
		6.	With a voltmeter, measure the following volt-				Arc Force dial is turned from min to max. See
			ages from J2 pin 6 (pos. lead) to J2 pin 2				Figure F.30.
			(neg. lead) at the control board. See Table				10. Remove the short and turn the engine off.
			F.2.
							11. If any of the voltage checks fail, proceed to
				WARNING
							the continuity check section.
			ELECTRIC SHOCK CAN KILL.				12. Locate and disconnect J4 at the control
				• Do	not touch	electrically	board. See Figure F.30.
				live	parts such	as output	13. Set the range selector switch in the CV posi-
TOC	TOC			terminals or internal wiring.
							tion.
Section	Master			• Insulate yourself from the
				work and ground.
				• Always wear dry insulating
Return to	Return to			gloves.
						COMMANDER 300