Lincoln Electric POWER WAVE S500 Service Manual page 116

F-68
REMOVAL AND REPLACEMENT PROCEDURE (continued)
FRONT PANEL
ASSEMBLY
REMOVAL PROCEDURE
WARNING
ELECTRIC SHOCK
• Do not touch electrically live
parts or electrodes with your
skin or wet clothing.
• Insulate yourself from the work and ground.
• Always wear dry insulating gloves.
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1. Remove input power to the Power Wave
machine.
2. Perform the Case Cover Removal and DC
Link Capacitor
Remove the right and left side case covers.
TROUBLESHOOTING AND REPAIR
PFC CONTROL BOARD
FIGURE F.25 – PFC CONTROL BOARD LOCATION
PFC BOARD
MOUNTING PANEL
can kill.
® S500
Discharge Procedure.
POWER WAVE
PFC CONTROL
BOARD
3. Locate the PFC Control Board.
F.25.
4. Label and remove plugs J20, J21, J22, J23A,
J23B, J24, J25 and J26. See Figure F.26. See
Wiring Diagram.
5. Using a 3/8" wrench, remove the four nuts
securing the PFC Control Board to the PFC
board mounting panel. See Figure F.25.
6. Carefully remove the PFC Control Board from
the mounting studs. Cut any cable ties that
may inhibit the removal.
® S500
F-68
See Figure