Lincoln Electric SP-250 #206B 4J6 #515B 1J6 #555 2J6 #541 6J6 #539 3J6, Pull the gun trigger

Return to Section TOC

Return to Section TOC

Section TOC

Return to Master TOC

Return to Master TOC

Master TOC

F-30 TROUBLESHOOTING & REPAIR F-30

WIRE DRIVE MOTOR AND TACHOMETER FEEDBACK TEST

	J2
J8	J7
#206B	J4
(4J6)	#515B
	(1J6)
	J5
J9	#555
J6	(2J6)
	J3
#541
(6J6)
#539
(3J6)

FIGURE F.10B - Plug J6 Location on G1992 PC Control Board (Code 9402 only.)

NOTE: Plugs J5 and J6 are on the inboard non-component side of the Control

Board.

Return to

Return to Section TOC

Return to

Return to Master TOC

4.Test for 2-25 VDC between lead #539 (positive) and lead #541 (neg- ative) to determine if the correct armature voltage is being supplied. See Figure F.10A or F.10B.

a.Insert probes in to the Molex pin cavities.

5.Pull the gun trigger.

6.Read meter. Normal DC volts is from 2 - 25 VDC. VDC varies depending on wire feed speed.

a.If voltage to the wire drive motor armature is zero, check the wires between Plug J5 (J6 on Code 9402) and the wire drive motor.

IDEALARC SP-250

b.If the wires are okay and voltage to the drive motor armature is zero, the Control Board may be faulty. Replace.

c.If the correct DC armature volt- age is present at the wire drive motor, the motor or motor brush- es may be faulty. Test and/or replace.

d.If the motor is running at high speed and the armature voltage is high and uncontrollable, pro- ceed with the tachometer test.