Figure f.2, Troubleshooting & repair, Control transformer (t2) voltage test (continued) – Lincoln Electric IDEALARC SVM136-A User Manual
Page 52
TROUBLESHOOTING & REPAIR
F-12
F-12
IDEALARC CV-400
FIGURE F.2 – CONTROL TRANSFORMER X1 AND X2 TEST CONNECTIONS
CONTROL TRANSFORMER (T2) VOLTAGE TEST
(continued)
6. Test for 115VAC between leads X1 and
#231.
NOTE: If the main AC input supply voltage
varies, the control transformer voltage will
vary by the same percentage.
a. Connect one end of an insulated alligator
clip to the X1 connection at the input con-
tactor (CR1) coil. See Figure F.2.
b. Connect the other end of the alligator clip
to one of the meter probes. Be sure that
neither the alligator clip nor the meter
probe touches any metal surfaces.
c. Connect the other meter probe to the
#231 connection (top lead) at the power
switch. See Figure F.2.
d. Apply input power to the CV-400.
7. Read the meter for 115VAC.
a. If 115VAC is present, the control trans-
former is functioning properly.
b. If 115VAC is NOT present, go to Step 8.
8. If 115VAC is not present between leads X1
and #231, check the spliced connection
between #231 and X2. Test for correct main
input supply power to the control transformer
primary windings (H1, H2, H3, etc.). Check
the main input supply power hookup to the
machine. See the Wiring Diagram.
a. If the correct main input supply power to
the control transformer primary windings
is present AND the secondary voltage is
not correct, the control transformer may
be faulty. Replace.
RIGHT SIDE VIEW
BACK OF
CONTROL
PANEL
LEAD #231
CONNECTION
METER
PROBE
MACHINE FRONT