Lincoln Electric LN-25 Service Manual page 50

F-13
HALL EFFECT MODULE TEST (continued)
FIGURE F.6 – CONTROL PC BOARD (CODES 10148 AND ABOVE).
J1
FIGURE F.7 – CONTROL PC BOARD (CODES 9812 AND BELOW).
TEST PROCEDURE
1. Open the case door. Remove the wire
reel by removing the retaining collar.
See Figure F.1.
2. Remove the three screws holding the
control box cover in place and remove
the control box cover. See Figure F.1.
TROUBLESHOOTING AND REPAIR
J3
539
500
539
539
541 541
555
555
J4
500 512
541
555 512
3. Locate the three hall effect leads 500,
512 and 555 incorporated in plug J4
on the control board (for codes 9812
and below, the leads connect directly
to the control board). Do not remove
the leads from the control board. See
Figure F.6 and Figure F.7.
LN-25
G2196
G2196
J2
G1757
G1757
F-13