Tweco 400 MST Arc Master - Manual (Page 59)

400MST
9
ADVANCED TROUBLESHOOTING
9 – 22
2.4 Replacement Procedure
2.4.1 PCB1 (WK-5493) 
1) Remove the side cover. [Reference page: 9-1]
2) Remove PCB2 (WK-5597). [Reference page: 9-23]
3) Remove the diode (D1). [Reference page: 9-39]
4) Remove the current transformers (CT2 and CT3). [Reference page: 9-41]
5) Remove two screws and three terminals from PCB1 (WK-5493).
6) Remove the reactor (L1). [Reference page: 9-41]
7) Disconnect one connector and remove four terminals.
8) Remove 18 screws and remove PCB1 (WK-5493).
Blue purple
orange brown
2
1
1