Lincoln Electric LN-25 Service Manual page 58

F-20
HALL EFFECT MODULE TEST (continued)
FIGURE F.9 – CONTROL PC BOARD (CODES 10148 THRU 10500).
J1
FIGURE F.10 – 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.5.
2. Remove the screws holding the control box
cover in place and remove the control box
cover. See Figure F.5.
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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
disconnect the leads from the board. See
Figure F.9, or F.10. See Figure F.11 for codes
above 10500.
LN-25™
F-20
G2196
G2196
J2
G1757
G1757