Lincoln Electric NA-5N Service Manual page 125

F-72
PC BOARD(S) REMOVAL AND REPLACEMENT
PROCEDURE
Before starting the following procedure,
refer
Troubleshooting Procedures at the
beginning of this section.
1. Remove the input power to the NA-
5.
2. Using the 5/16" nutdriver open the
control box PC board cover.
3. Carefully remove the molex type
plugs (and leads) connected to the
PC board that is to be removed.
4. Using the phillips head screwdriver,
remove the PC board mounting
screws.
5. Carefully remove the PC board.
REPLACEMENT PROCEDURE
1. Using the phillips head screwdriver
and mounting screws carefully posi-
tion and install the new PC board.
2. Reconnect the molex type plugs
(and leads) into the new PC board.
3. Close and secure the access door.
TROUBLESHOOTING & REPAIR
to the PC Board
NA-5
F-72
(Continued)