Troubleshooting & repair, T1 and t2 transformer test – Lincoln Electric NA-5S User Manual
Page 97
F-44
TROUBLESHOOTING & REPAIR
F-44
7. Check for approximately 22VAC at
the blue secondary leads. The blue
secondary leads are connected to
the logic board. See wiring diagram.
8. Check for approximately 18VAC at
the white to red leads. The white
and red leads are connected to the
power board. See wiring diagram.
9. Check for approximately 36VAC at
the red to red leads. Both red leads
are also connected to the power
board. See wiring diagram.
10. If all the secondary voltages are
correct the T1 transformer is func-
tioning properly.
11. If any or all of the secondary volt-
ages are low or not present the T1
transformer may be faulty.
12. Using the 115VAC supply carefully
apply 115VAC to the T2 primary
leads #531B and #532.
13. Check for approximately 115VAC
at the orange secondary leads.
The orange leads are connected to
the power board. See wiring dia-
gram.
14. Check for approximately 24VAC at
the brown secondary leads. See
wiring diagram.
15. If all the secondary voltages are
correct the T2 transformer is func-
tioning properly.
16. If any or all of the secondary volt-
ages are low or not present the T2
transformer may be faulty.
17. Reconnect the primary leads
(#531B and #532) to the TS2 termi-
nal strip.
18. Close and secure the access door.
T1 and T2 TRANSFORMER TEST
(Continued)
NA-5