Troubleshooting & repair, Control transformer (t2) voltage test (continued) – Lincoln Electric IDEALARC SVM 122-A User Manual
Page 63
TROUBLESHOOTING & REPAIR
F-19
F-19
LINCOLN
®
ELECTRIC
IDEALARC DC-400
CONTROL TRANSFORMER (T2) VOLTAGE TEST (continued)
FIGURE F.3 – CONTROL TRANSFORMER AND LEAD LOCATIONS
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.