Tweco 400 MST Arc Master - Manual (Page 76)

400MST
9
ADVANCED TROUBLESHOOTING
9 – 39
2.4.22 Current Sensor (HCT1) 
1) Remove the side cover. [Reference page: 9-1]
2) Remove PCB17 (WK-5699). [Reference page: 9-33]
3) Remove one screw and one terminal. Remove one bolt and one terminal. Disconnect one connector.
Remove one screw and one nut and detach the bus bar.
4) Remove one screw and remove the current sensor (HCT1).
2.4.23 Diode (D1) 
1) Remove the side cover. [Reference page: 9-1]
2) Remove PCB3 (WK-5548). [Reference page: 9-24]
3) Remove six screws and 13 terminals. Remove two screws and remove the diode (D1).
 When replacing the diode with a new one, apply an oil compound (SHINETSU SILICONE G-747 or
equivalent) evenly to the base.
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1
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CN1
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