Control / Display Board Removal And Replacement Procedure - Lincoln Electric Tomahawk 1500 Service Manual

LINCOLN ELECTRIC

CONTROL / DISPLAY 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 Control / Display Board.
MATERIALS NEEDED
1/4" Nutdriver
Phillips Screwdriver
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 plug J22 from the control / display board. See
Diagram.
4. Carefully remove the red cover from the knob on the front of the machine. See
5. Using a 1/4" nutdriver, remove the nut and washer securing the knob to the board. See
6. Using a Phillips screwdriver, remove the four screws and washers securing the board to the
machine. See
7. The control / display board can now be removed and replaced.
REPLACEMENT PROCEDURE
1. Carefully position the new control / display board into the
2. Using a Phillips screwdriver, attach the four screws and washers securing the board to the machine.
3. Carefully position the knob onto the shaft of the control board. Make sure to rotate the knob all the
way to the left and position the knob point accordingly.
4. Using a 1/4" nutdriver, attach the nut and washer securing the knob to the board.
5. Place the red knob cover onto the knob.
6. Connect plug J22 to the control / display board. See Wiring Diagram.
7. Perform the Case Cover Replacement Procedure.
8. Perform the Retest After Repair Procedure.
Figure F.35.
Tomahawk® 1500 Service Manual
Figure
machine.
F.33. See Wiring
Figure F.34.
Figure F.34.
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