Troubleshooting & repair – Lincoln Electric PRO-CUT 55 SVM140-A User Manual
Page 89
5. Locate the control board and the five molex
type plugs connected to it. See Figure F.17.
6. Carefully remove the five molex type plugs by
depressing the locking tabs and gently
extracting the plugs from the P.C. board
receptacles.
7. Using the needle-nose pliers and screwdriv-
er, gently remove the control board from the
eight mounting pins by depressing the tabs
on the mounting pins and carefully removing
the board from the pins. See Figure F.18.
Be sure to follow the recommended static-free
methods for handling printed circuit boards.
Failure to do so can result in permanent damage
to the equipment.
8. When replacing the control board, align the
mounting holes with the eight mounting pins
and gently slide the P.C. board onto the
mounting pins until the board “snaps” onto
the pins.
9. Replace the five molex type plugs in their
respective receptacles. Be certain they are
securely in place.
10. Carefully reposition the front assembly in
place and install the four mounting screws
previously removed.
11. Inspect, clear and secure all leads before
installing the case wrap-around reassembly.
12. Using the 5/16” nut driver, install the case
wraparound.
TROUBLESHOOTING & REPAIR
F-52
F-52
PRO-CUT 55
MOUNTING
PIN (8)
CONTROL
BOARD
DEPRESS
LOCKING TAB ON
MOUNTING PIN
FIGURE F.18 - CONTROL BOARD REMOVAL FROM MOUNTING PINS
CONTROL BOARD REMOVAL AND REPLACEMENT (continued)
CAUTION