Lincoln Electric NA-5N Service Manual page 99

F-46
VOLTAGE BOARD TRANSFORMER TEST
TEST PROCEDURE
1. Remove all input power to the NA-5.
2. Using the 5/16" nutdriver open the
control box PC board access door.
3. Locate the voltage board. See
Figure F.3
TROUBLESHOOTING & REPAIR
FIGURE F.3 VOLTAGE BOARD LOCATION
NA-5
(Continued)
4. Remove the molex type plugs from
the voltage board.
5. Using the phillips head screwdriver
remove the voltage board from the
control box.
6. Locate the transformer and test
points on the voltage board. See
Figure F.4
F-46
VOLTAGE
BOARD