Output Board Removal And Replacement Procedure - Lincoln Electric Tomahawk 1500 Service Manual

LINCOLN ELECTRIC

OUTPUT 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 Output Board.
MATERIALS NEEDED
Torx Nutdriver (Size T-20)
RTV Compound
7/64" Allen Wrench
Dow Corning 340 Heat Sink Compound (Lincoln Part #T12837)
Wiring Diagram
REMOVAL PROCEDURE
1. Remove the input power from the Tomahawk 1500.
2. Perform the Case Cover Removal And Capacitor Discharge Procedure.
3. Label and disconnect plugs J32 and J33 from the output board. See
Diagram.
4. Label and disconnect leads from terminals B1, B2 and B11 on the output board. See
See Wiring Diagram.
5. Using a Torx nutdriver (size T-20), remove the six screws, lock washers and flat washers securing
leads to the board. Label and disconnect leads from terminals B5, B6, B7, B8, B9 and B10 from the
output board. See
6. Using a Torx nutdriver (size T-20), remove the two screws, lock washers and flat washers securing
leads to terminals 1 and 3 of the resistor module. See
7. Carefully remove the RTV compound from the twelve output board mounting screws.
8. Using a Torx nutdriver (size T-20), remove the twelve screws, lock washers and flat washers securing
the output board to the modules. See Figure F.41.
9. The output board can now be removed and replaced.
10. Using a Torx nutdriver (size T-20), remove the two screws, lock washers and flat washers securing
each module to the heat sink. Note the orientation of the slot for reassembly. See
Repeat for each module, as necessary.
11. Using a 7/64" Allen wrench, remove the two screws, lock washers and flat washers securing the
resistor module to the heat sink. Note the orientation of the slot for reassembly. See
12. The output modules can now be removed and replaced.
Figure F.40. See Wiring Diagram.
Tomahawk® 1500 Service Manual
Figure
Figure F.40. See Wiring Diagram.
F.40. See Wiring
Figure F.40.
Figure F.42.
Figure F.42.
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