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TROUBLESHOOTING & REPAIR
CONTROL TRANSFORMER (T5) VOLTAGE TEST (continued)
FIGURE F.13 - LOCATION OF CONTROL BOARD AND CONTROL TRANSFORMER
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TEST PROCEDURE
1.Remove input power to the machine.
2.With the 5/16” nut driver, remove the machine case top and sides.
3.Locate plug J4 on the power board. (Do not remove.) Also locate the two black sec- ondary leads. See Figure F.13.
WARNING
ELECTRIC SHOCK can kill.
•With input power ON, there are high voltages inside the machine. Do not reach into the machine or touch any internal part of the machine while power is on.
4.Check for 120VAC at the primary leads #265 to #266.
A.If 120VAC is present at leads #265 to #266, go to Step 7.
Note: If input voltage varies, the con- trol transformer voltages will vary accordingly.
B.If a very low or zero voltage is shown at leads #265 to #266, go to Step 5.
5.Remove input power to machine.
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3. Turn input power ON.
SQUARE WAVE TIG 355
