Test Procedures; Case Cover Removal And Replacement And Capacitor Discharge Procedure - Lincoln Electric Tomahawk 1500 Service Manual

LINCOLN ELECTRIC

Test Procedures

CASE COVER REMOVAL AND REPLACEMENT AND CAPACITOR DISCHARGE
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 Case Covers and Capacitor
Discharge.
MATERIALS NEEDED
5/16" Nutdriver
25 – 1000 Ohm Resistor (25 Watts Minimum)
Insulated gloves
Insulated Pliers
Wiring Diagram
REMOVAL PROCEDURE
1. Remove the input power from the Tomahawk 1500 machine.
2. Using a 5/16" nutdriver, remove the eight (sixteen total) screws and washers securing each of the
handles to the machine. See Figures F.1.
3. Carefully remove both handles.
4. Using a 5/16" nutdriver, remove the four screws and washers securing each of the corner caps to
the case cover. See Figure F.1.
5. Using a 5/16" nutdriver, remove the four screws securing the case cover. See Figure F.2.
6. The case cover can now be removed.
7. Locate the capacitor and carefully check the DC voltage at the terminals. See Figure F.3 and Figure
F.4.
8. If any voltage is present, discharge the capacitor using the high wattage resistor (25-1000 Ohms @
25 watts minimum), electrically insulated gloves and pliers. Hold the resistor on the capacitor
terminals for 10 seconds. See Figure F.4.
9. Recheck the voltage across the capacitor terminals. The voltage should be zero. If any voltage
remains repeat the discharge procedure until the voltage is zero.
10. Locate the buck / boost board. See Figure F.5.
Tomahawk® 1500 Service Manual
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