Tweco 400 MST Arc Master User Manual
Page 69
400MST
9
ADVANCED TROUBLESHOOTING
9 – 32
2.4.13 PCB16 (WK-4917)
1) Remove the side cover. [Reference page: 9-1]
2) Remove six screws from the switch (S1) and disconnect six terminals.
3) Remove four screws and open the rear board.
4) Disconnect the one connector. Remove the two screws and one ground terminal. Remove the PCB16
(WK-4917).
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CN1
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