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TROUBLESHOOTING & REPAIR
CONTROL TRANSFORMER (T2) VOLTAGE TEST (continued)
FIGURE F.4 – CONTROL TRANSFORMER X1 AND X2 TEST CONNECTIONS
RIGHT
SIDE VIEW
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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 alliga- tor clip to the X1 connection at the input contactor (CR1) coil. See Figure F.4.
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 F4.
d.Apply input power to the
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 trans- former may be faulty. Replace.
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LINCOLN ®
ELECTRIC
