Lincoln Electric 11694 Service Manual page 36

®
POWER WAVE S350
PROCEDURE
1. Remove the input power to the Power Wave S350 machine.
2. Perform the Case Cover Removal and DC Link Capacitor
Discharge Procedure.
3. Locate the control board on the right side of the machine. See
Figure F.9.
4. Carefully apply the correct input voltage to the Power Wave S350
machine.
5. For LEDs status and functions, see Figure F.10. If Led #9 is
green the proper input voltage is being applied to the control
board. If LED #1 is green the control board's functioning status is
"OK".
6. If further testing is required proceed to Step #7.
7. Using the voltmeter, carefully check the voltages per Table F.3.
See Figure F.11 for test point locations and Figure F.12 for lead
locations. See Wiring Diagram.
8. Using the ohmmeter, check the resistances per Table F.4. See
Figure F.11 for test point locations and Figure F.12 for lead
locations. See Wiring Diagram.
9. Remove the input power to the Power Wave S350 machine.
10. If any of these tests fail, perform the Control Board Removal
And Replacement Procedure.
11. Perform the Case Cover Replacement Procedure.
CONTROL BOARD TEST
Figure F.9 – Control board location
TROUBLESHOOTING AND REPAIR
(continued)
CONTROL
BOARD
30