Lincoln Electric NA-5N Service Manual page 118

F-65
METER CIRCUIT ACCURACY TEST
TEST PROCEDURE
1. Remove input power to the NA-5.
2. Using the 5/16" nutdriver open the
control box PC board access door.
3. Locate the voltmeter PC board. See
Figure F.9
4. Apply input power to the NA-5.
FIGURE F.9 VOLTMETER PC BOARD AND TEST POINTS
TROUBLESHOOTING & REPAIR
TP4
TP5
L6685-[ ] METER
NA-5
(Continued)
5. Test for AC supply to the volt-
meter PC board.
• Check for 8 to 11VAC from lead
#601 to #602. See Figure F.9
Note: The coating will have to be
removed from the test points to ensure
accurate voltmeter readings. If the cor-
rect AC voltage is not present check for
loose or faulty connects with the associ-
ated leads. See wiring diagram.
517
518
601
510C
510
602
F-65