Weld Control Board Removal And Replacement Procedure - Lincoln Electric Fleet 650 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
5/16" Nutdriver
Wiring Diagram
REMOVAL PROCEDURE
1. Turn off the engine on the Fleet 650 machine.
2. Perform the Case Cover Removal Procedure.
3. Perform the Chopper Module Capacitor Discharge Procedure.
4. Label and disconnect plugs J1, J3, J6 and J7 from the weld control board. See Figure F.40. See
Wiring Diagram.
5. Using a 5/16" nutdriver, remove the four screws securing the weld control board to the PCB
bracket. See Figure F.41.
6. The weld control board
REPLACEMENT PROCEDURE
1. Carefully position the new weld control board onto the PCB bracket.
2. Using a 5/16" nutdriver, attach the four screws securing the weld control board to the PCB bracket.
3. Connect plugs J1, J3, J6 and J7 to the weld control board. See Wiring Diagram.
4. Perform the Case Cover Replacement
5. Perform the Retest After Repair Procedure.
can now be removed and replaced.
Procedure.
Fleet™ 650 Service Manual
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