Tweco 400 MST Arc Master - Manual (Page 54)

400MST
9
ADVANCED TROUBLESHOOTING
9 – 17
2
Subsystem Test and Replacement Procedures
2.1 Preparation
This section provides specific procedures for verifying the operation and replacement of each subsystem
within the power supply.
Before undertaking any of these procedures, eliminate the obvious first-visually inspect the suspect sub-
system for physical damage, overheating, and loose connections.
2.2 Test and Replacement Parts List
2
4
1
8
9
3
5
6
7
No. DWG No. Parts name Reference page Part No.
1 PCB2 Print Circuit Board (WK-5597) 9-23 W7001313
2 PCB3 Print Circuit Board (WK-5548) 9-24 W7001314
3 PCB4 Print Circuit Board (WK-4819) 9-26 10-6635
4 PCB5 Print Circuit Board (WK-5696) 9-26 W7001315
5 PCB7 Print Circuit Board (WK-5689) 9-24 W7001317
6 PCB12 Print Circuit Board (WK-5527) 9-28
W7001744
7 PCB13 Print Circuit Board (WK-5528) 9-29 W7001320
8 PCB14 Print Circuit Board (WK-5594) 9-30 W7001321
9 PCB16 Print Circuit Board (WK-4917) 9-32 10-6740