Lincoln Electric SVM138-A Service Manual page 99

F-35
HALL EFFECT MODULE TEST AND ALIGNMENT (continued)
FIGURE F.7 – LEADS #525, #510, #555 ON CONTROL PC BOARD
HALL EFFECT MODULE FEEDBACK
TEST PROCEDURE
1. Remove the input power to the LN-9 GMA
wire feeder.
2. Remove any electrode wire or disengage
the drive rolls.
3. Using the phillips head screwdriver, remove
the screws from the left side cover assembly.
TROUBLESHOOTING & REPAIR
LEAD
525
LN-9 GMA Wire Feeder
LEAD LEAD
510 555
4. Lift the left side cover.
5. Locate the hall effect leads #510, #525 and
#555 on the control PC board. See Figure
F.7.
F-35