Pilot Board Test Procedure - Lincoln Electric FlexCut 200 Service Manual

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LINCOLN ELECTRIC

PILOT BOARD TEST 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 test will determine if the Pilot Board is functioning properly. This test will not test all sections of the
pilot board.
MATERIALS NEEDED
Volt/Ohmmeter
Wiring Diagram
TEST 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. Locate the pilot board. See Figure F.40. See Wiring Diagram.
5. Using a volt/ohmmeter, perform the diode tests outlined in Table F.15. See Figure F.41. See Wiring
Diagram.
6. If the diode tests fail, the isotop IGBT may be faulty.
7. If faulty, perform the Isotop IGBT Removal And Replacement Procedure.
8. Carefully apply the correct input power to the machine and turn ON the machine.
9. Perform the voltage tests outlined in Table F.16. See Figures F.41 and F.42. See Wiring Diagram.
10. Perform the LED inspections outlined in Table F.17. See Figure F.41. See Wiring Diagram.
11. If any of the tests fail, the pilot board may be faulty.
12. If faulty, perform the Pilot Board Removal And Replacement Procedure.
13. Connect any previously disconnected leads.
14. Perform the Case Cover Replacement Procedure.
TEST POINT (POS)
B11
B10
Table F.15 – Pilot board diode drop tests
TEST POINT (NEG)
B10
B11
FlexCut® 200 Service Manual
EXPECTED READING
.25V TO .70V
OL
IGBT TESTED
A3 (IGBT)
A3 (IGBT)
59

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