Snubber Board Removal And Replacement Procedure - Lincoln Electric FlexCut 200 Service Manual

LINCOLN ELECTRIC

SNUBBER 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
MATERIALS NEEDED
7/16" Nutdriver
Phillips Screwdriver
Torx Nutdriver (Size T25)
Dow Corning 340 Heat Sink Compound (Lincoln Part #T12837)
Wiring Diagram
REMOVAL PROCEDURE
1. Carefully remove input power from the FlexCut 200 machine.
2. Perform the Case Cover Removal Procedure.
3. Perform the Capacitor Discharge Procedure.
4. Using a 7/16" nutdriver, remove the two screws, lock washers and flat washers securing leads to
terminals B4 and B6 of the snubber board. See Figure F.85. See Wiring Diagram.
5. Using a 7/16" nutdriver, remove the four screws, lock washers and flat washers securing the bus
bars, torroids and leads X2 and X4 to terminals B1/B2 and B3/B5 on the snubber board. See Figure
F.85. See Wiring Diagram.
6. Cut cable ties as necessary and route leads to allow for the removal of the board.
7. Using a Phillips screwdriver, remove the sixteen screws, lock washers and flat washers securing the
snubber board to the IGBT modules. See Figure F.86.
8. The snubber board can now be removed and replaced.
9. Using a Torx nutdriver (size T25), remove the four screws and lock washers securing each of the four
IGBT modules. See Figure F.87.
10. The IGBT modules
REPLACEMENT PROCEDURE
1. Apply a thin coating of Dow Corning 340 heat sink compound to the mating surfaces of the IGBT
modules and the heat sink. See Figure F.88.
can now be removed and replaced.
FlexCut® 200 Service Manual
Snubber Board.
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