Lincoln Electric 11694 Service Manual page 42

®
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 switch board on the left side of the machine. See
Figure F.13.
4. Carefully apply the correct input power to the Power Wave
S350. Check the LEDs per Table F.5. See Figure F.14 for LED
locations.
5. If the LEDs are not indicating a properly functioning switch board
(per Table F.5) proceed with the following steps.
6. Using a volt/ohmmeter, check the voltages per Table F.6. See
Figure F.15, for test point locations. See Wiring Diagram.
7. Using a volt/ohmmeter, check the switch board resistances per
Table F.7. See Figure F.15, for test point locations. See Wiring
Diagram.
8. If any of the test results are not correct, perform the Switch
Board Removal And Replacement Procedure.
9. Replace all previously removed plugs and leads.
10. Perform the Case Cover Replacement Procedure.
SWITCH BOARD TEST
Figure F.13 – Switch board location
SWITCH BOARD
TROUBLESHOOTING AND REPAIR
(continued)
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