Troubleshooting & repair – Lincoln Electric POWER WAVE SVM173-A User Manual
Page 114
TROUBLESHOOTING & REPAIR
F-68
F-68
POWER WAVE 455M/MSTT
COMPARTMENT
COVER
CONTROL
BOARD
POWER
BOARD
DC BUS
POWER BOARD
FIGURE F.22 – CONTROL OR FEED HEAD BOARD REMOVAL AND REPLACEMENT
CONTROL, FEED HEAD, OR VOLTAGE SENSE PC BOARD
REMOVAL AND REPLACEMENT (CONTINUED)
REMOVAL PROCEDURE
1. Remove input power to the Power Wave
455M.
2. Using the 3/8” nut driver, remove the case
top.
3. Perform the Capacitor Discharge proce-
dure.
4. Observe all static electricity precautions.
5. Using the 3/8” nut driver, remove the PC
board compartment cover. Refer to Figure
F.22.
6. Using the 3/8” nut driver, remove the two
screws holding the rear of the Control Box in
place.
7. Clear the leads in the sleeving and the grom-
mets on the sides of the control box.
8. Label and remove the molex plugs from the
Control Board and the Feed Head Board.