Weld Control Board Removal And Replacement Procedure - Lincoln Electric Cross Country 300 Service Manual

LINCOLN ELECTRIC
WELD CONTROL 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 Weld Control Board.
MATERIALS NEEDED
3/8" Nutdriver
Phillips Screwdriver
Wiring Diagram
REMOVAL PROCEDURE
1. Turn off the engine on the Cross Country 300 machine.
2. Perform the Case Cover Removal Procedure.
3. Perform the Capacitor Discharge Procedure.
4. Label and disconnect plugs J1, J2, J3, J4, J5, J6 and J7 from the weld control board. See Figure F.59.
See Wiring Diagram.
5. Using a 3/8" nutdriver, remove the four nuts securing the PC board mounting bracket to the control
panel. See Figure F.60.
6. Carefully remove the weld control board and bracket assembly out of the machine.
7. Using a Phillips screwdriver, remove the four screws securing the weld control board to the PC
board mounting bracket. See Figure F.61.
8. The weld control board can now be removed and replaced.
REPLACEMENT PROCEDURE
1. Carefully position the new weld control board onto the PC board mounting bracket.
2. Using a Phillips screwdriver, attach the four screws securing the weld control board to the PC board
mounting bracket.
3. Carefully position the weld control board and bracket assembly onto the rear of the control panel.
4. Using a 3/8" nutdriver, attach the four nuts securing the PC board mounting bracket to the control
panel.
5. Connect plugs J1, J2, J3, J4, J5, J6 and J7 to the weld control board. See Wiring Diagram.
6. Perform the Case Cover Replacement Procedure.
7. Perform the Retest After Repair Procedure.
Cross Country™ 300 Service Manual
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