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TROUBLESHOOTING & REPAIR
CONTROL TRANSFORMER (T2) VOLTAGE TEST (continued)
FIGURE F.3 – CONTROL TRANSFORMER AND LEAD LOCATIONS
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TEST PROCEDURE
1.Disconnect the main input supply power to the machine.
2.With the 5/16” nut driver, remove the top, case sides, and lower the front control panel.
3.Locate the control transformer (T2) on the left side of the input box (facing the back of the machine). See Figure F.3.
4.Locate the control transformer primary leads (H1, H2, H3, etc.). See the Wiring Diagram.
NOTE: Unused leads should be taped.
a.Inspect for broken or incorrect con- nections.
5.Locate control transformer leads X1 (top) and X2.
a, Lead X1 is connected to the input con- tactor (CR1) coil located on the input side of the contactor. See Figure F.3.
b.Lead X2 is spliced into lead #231. See the Wiring Diagram. Lead #231 is connected to the power switch (S1). Remove five machine screws holding the control panel to the case front and tilt the panel forward to access the power switch and Lead #231 connec- tion. See Figure F.4.
IDEALARC
LINCOLN ®
ELECTRIC
