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TROUBLESHOOTING AND REPAIR
SCR BRIDGE ASSEMBLY
REMOVAL AND REPLACEMENT PROCEDURE (Continued)
FIGURE F.8 FRONT PANEL MOUNTING SCREWS
FRONT PANEL
MOUNTING
SCREWS
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9.Remove plug J2 from the control board. (See Figure F.9.) Also remove plug and lead harness from internal divider panel.
10.Carefully slide the internal divider panel away a few inches to allow access to the SCR bridge assem- bly.
11.Using the 7/16” wrench disconnect the diode pigtail connection from the polarity switch lead. See Figure F.10. Cut any necessary cable ties and remove insulating sleeving.
Note placement of sleeving and cable ties for reassembly.
12. Using the 7/16” wrench remove the
X2 secondary transformer lead from the left side AC SCR heat sink.
13.With the 7/16” wrench remove the shunt from the SCR bridge left side negative heat sink.
14.Using the 7/16” wrench remove the polarity switch lead from the right side AC SCR heat sink.
15.Using the 7/16” wrench remove the positive lead from the right side positive heat sink.
