Flexible Power Supply Board Removal And Replacement Procedure - Lincoln Electric LN-25x Service Manual

LINCOLN ELECTRIC

FLEXIBLE POWER SUPPLY BOARD REMOVAL AND REPLACEMENT PROCEDURE

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized
repairs performed on this equipment may result in danger to the technician or machine operator and will
invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety
notes and precautions detailed throughout this manual. If for any reason you do not understand the test
procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department
for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This procedure will aid the technician in the removal and replacement of the Flexible Power Supply Board.
MATERIALS NEEDED
3/8" Nutdriver
Wiring Diagram
REMOVAL PROCEDURE
1. Remove the input power to the LN-25x wire feeder.
2. Perform the Wire Drive Assembly And Control Box Cover Removal Procedure.
3. Label and disconnect plugs J1, J2, J3, J4, J5 and J6 from the flexible power supply board. See
F.35. See Wiring Diagram.
4. Using a 3/8" nutdriver, remove the four nuts securing the flexible power supply board to its
mounting posts. See
5. The flexible power supply board can now be removed and replaced.
REPLACEMENT PROCEDURE
1. Carefully position the new flexible power supply board onto its mounting posts.
2. Using a 3/8" nutdriver, attach the four nuts securing the flexible power supply board to the
mounting posts.
3. Connect plugs J1, J2, J3, J4, J5 and J6 to the flexible power supply board. See Wiring Diagram.
4. Perform the Wire Drive Assembly And Control Box Cover Replacement Procedure.
5. Perform the Retest After Repair Procedure.
Figure F.36.
LN-25x™ Service Manual
Figure
48