Lincoln Electric POWER WAVE S500 Service Manual page 132

F-84
REMOVAL AND REPLACEMENT PROCEDURE (continued)
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 the input voltage from the Power
Wave S500 machine.
®
2. Perform the Case Cover Removal and
Capacitor Discharge Procedure.
3. Locate the Input Board. See Figure F.32.
TROUBLESHOOTING AND REPAIR
INPUT BOARD
FIGURE F.32 – INPUT BOARD LOCATION
can kill.
POWER WAVE
4. Carefully remove the input board cover. Cut the
three cable ties holding the input board cover in
place.
5. Label and remove plug J1 from the Input Board.
See Figure F.33. See Wiring Diagram.
6. Using a 7/16" wrench, label and remove leads
B1, B2 and B3 from the Input Board.
Figure F.33. See Wiring Diagram.
7. Using a 7/16" wrench, label and remove leads
B4 and B5 from the Input Board. See Figure
F.33. See Wiring Diagram.
8. Using a 3/8" nutdriver, remove the four nuts
securing the Input Board to the mounting posts.
See Figure F.33.
® S500
F-84
INPUT
BOARD
See