Section TOC
Master TOC
TROUBLESHOOTING & REPAIR |
MAIN TRANSFORMER AND OUTPUT CHOKE ASSEMBLY REMOVAL AND REPLACEMENT PROCEDURE (Continued)
Return to
Return to Master TOC
Return to Master TOC
REMOVAL PROCEDURE
1.Remove input power to the TIG 185 machine.
2.Perform the SCR Bridge Assembly Removal Procedure.
3.Unsolder the two 115VAC leads and leads B231 and B232 from the main transformer leads. Label leads for reassembly. See wiring diagram.
4.Unsolder leads W201 and W204 from the main transformer leads. Label leads for reassembly. See wiring diagram.
5.Unsolder leads R209 and U210 from the main transformer leads. Label leads for reassembly. See wiring dia- gram.
6.Using the 1/2” wrench remove the shunt assembly from the choke lead.
7.With the 3/8” wrench remove the H1, H2 or H3 lead from the input power switch. See wiring diagram. Label the leads and connection points for reassembly. Cut any necessary cable ties.
8.Remove plug J3 from the control board and push through the interior divider panel.
9.Using the 1/2” wrench remove the choke lead from the polarity switch. See wiring diagram. Label lead and connection point for reassembly.
10.With the 1/2” wrench remove the X1 secondary lead from the polarity switch. See wiring diagram. Label lead and connection point for reassembly.
11.With the 1/2” wrench remove the four nuts and lock washers from the transformer mounting bolts at the base of the machine.
12.Carefully hoist the transformer/ choke assembly clear of the base. Clear all leads.
