MOTOR CHECk.
Remove the torch connector from the cabinet.
Using the torch Control Cable Connector, check the resistance
across pins “A” and “B” (motor leads). The resistance across the
motor should be between 5-10 ohms. If an open circuit or short
exist, check the motor leads and motor independently.
TESTINg THE POTENTIOMETER.
Using the torch Control Cable Connector, check the resistance
across pin “D” (wiper) and pin “C”. The resistance should vary
from 5K - 0 ohms.
Check the resistance across pin “D” (wiper) and pin “G”. The
resistance should vary from 5K - 0 ohms.
TESTINg THE TRIggER SwITCH.
Using the torch Control Cable Connector, check for continuity
across pins “E” and “F” when the trigger is pressed.
12
Observe all Safety Guidelines detailed throughout this manual
TROUBLESHOOTING
MAGNUM PRO 250 LX & LX GT SPOOL GUN
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
A
B
C
D
E
G
F
"W" CLOCKED
CONNECTOR
(VIEWED FROM FRONT OF CONNECTOR)
A
B
G
D
F
E
TORCH
FUNCTIONS
+
-
MOTOR
TORCH
C
POT
TORCH
1
3
2
5K
CW
TORCH
TRIGGER
GRAY
YELLOW
BLACK
GREEN
BLUE
BROWN
RED
