Troubleshooting & repair, T1 and t2 transformer test – Lincoln Electric NA-5S User Manual
Page 96
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F-43
TROUBLESHOOTING & REPAIR
F-43
PROCEDURE
1. Remove all input power to the NA-5.
2. Using 5/16" nutdriver open the con-
trol box PC board access door.
3. Locate the T1 and T2 transformers.
See Figure F.2
4. Locate and remove the two sets of
primary leads (#531B and #532)
from the upper terminal strip TS2.
Label leads for reassembly. See
wiring diagram and Figure F.2
5. Using the 115VAC supply carefully
apply 115VAC to the T1 primary
leads #531B and #532.
6. Check for approximately 10VAC at
the yellow secondary leads (#601
and #602). See wiring diagram.
T1 and T2 TRANSFORMER TEST
(Continued)
NA-5
FIGURE F.2 T1 AND T2 TRANSFORMERS
POWER
BOARD
LOGIC
BOARD
UPPER
TERMINAL
STRIP
T1 TRANSFORMER
T2 TRANSFORMER
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