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TROUBLESHOOTING & REPAIR
MAIN TRANSFORMER AND CHOKE REMOVAL
AND REPLACEMENT PROCEDURE (continued)
MAIN TRANSFORMER REMOVAL
10.With the 1/2” wrench, remove the six trans- former secondary leads from the SCR heat sink assembly.
11.Remove the transformer primary leads from the reconnect panel. Label for reassembly.
12.Carefully label and unsolder the following leads from the transformer windings. Cut any necessary cable ties. See the Wiring Diagram.
❒ 335 | ❒ 203 | ❒ 31 |
❒ 336 | ❒ 204 | ❒ 32A |
❒ 331 | ❒ 205 | ❒ 41 |
❒ 332 | ❒ 206 | ❒ 42A |
❒ 333 | ❒ 207 | ❒ 41 |
❒ 334 | ❒ 208 | thermostat |
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13.Using a rope sling and hoist, support the iron/coil assembly. See Figure F.21.
14.With the 9/16” wrench, remove the four bolts, washers and nuts holding the iron/coil assembly to the frame assembly.
15.Cut or remove any necessary cable ties.
16.Using the hoist, carefully remove the iron/coil assembly from the
REASSEMBLY
1.Using the rope sling, carefully position the iron/coil assembly onto the
2.Attach the transformer primary leads to the reconnect panel.
3.Attach the six transformer secondary leads to the SCR heat sink assembly.
4.Solder the following leads to the transformer windings.
❒ 335 | ❒ 203 | ❒ 31 |
❒ 336 | ❒ 204 | ❒ 32A |
❒ 331 | ❒ 205 | ❒ 41 |
❒ 332 | ❒ 206 | ❒ 42A |
❒ 333 | ❒ 207 | ❒ 41 |
❒ 334 | ❒ 208 | thermostat |
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5.Using a crane or hoist, carefully place the choke onto the main transformer.
6.Attach the high inductance output lead to the bottom choke lead.
7.Attach the low inductance output lead to the choke center tap.
8.Attach the #222A lead and flexible trans- former secondary lead to the top choke lead.
9.Attach leads #273 and 41A to the choke thermostat.
10.Replace any cable ties cut at disassembly.
11.Install the case top and sides.
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