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LINCOLN ELECTRIC
INPUT 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 Input Board.
MATERIALS NEEDED
7/64" Allen Wrench
Wiring Diagram
REMOVAL PROCEDURE
1. Remove the input power from the Tomahawk 1500 machine.
2. Perform the Case Cover Removal And Capacitor Discharge Procedure.
3. Label
and disconnect plugs J1, J2, J3, J4, J5, J6, J8 and J9 from the input board. See
Wiring Diagram.
4.
Using a 7/64" Allen wrench, remove the four screws, lock washers and flat washers securing the
board to the mounting posts. See
5.
The input board can now be removed and replaced.
REPLACEMENT PROCEDURE
1. Carefully position the input board into the machine.
2.
Using a 7/64" Allen wrench, attach the four screws, lock washers and flat washers securing the input
board to the mounting posts.
3.
Connect plugs J1, J2, J3, J4, J5, J6, J8 and J9 to the input board. See Wiring Diagram.
4.
Perform the
Case Cover Replacement
5. Perform the Retest After Repair Procedure.
Figure
F.32.
Procedure.
Tomahawk® 1500 Service Manual
Figure
F.31. See
54
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