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Tweco 400 MST Arc Master User Manual

Page 82

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400MST

9

ADVANCED TROUBLESHOOTING

9 – 45

4) Remove four screws and open the rear cabinet.

5) Cut off three snap bands.

When reinstalling the transformer, secure the harnesses to the holders using snap bands.

6) Cut off one snap band. Cut off one snap band that ties together the harness of CN7 on PCB17 (WK-

5699) and the harness wired to the rear side. Cut off one snap band that ties together the harness on the
secondary side of the transformer (T1) and the harnesses of CN7/CN1 on PCB17 (WK-5699).

2

1

1

1

1

2

CN1

CN7

1

2

3