Lincoln Electric NA-5N Service Manual page 133

F-80
TACH PC BOARD REMOVAL AND REPLACEMENT
REASSEMBLY
1. Upon reassembly the spacers must
be used to assure that the disc
rotates freely and smoothly within
the sensor "window" on the printed
circuit board. Note the tach PC
board must be held in place when
aligning the rotating disc in the sen-
sor window. Press down on the tach
PC board with your finger to simulate
the cover.
2. Use the 3/8" wrench to hold the nut
in place. Attach the rotating disc
with the phillips head screw.
3. Thread leads #510A, #525A and
#555 through the cover plate and
into the connection box. Attach to
their respective in-line connectors.
4. Replace the connection box cover.
5. Replace the pick-up assembly cover.
6. Reattach the tach cover to the wire
feed drive motor.
TROUBLESHOOTING & REPAIR
NA-5
F-80
(Continued)