Tweco 400 MST Arc Master - Manual (Page 65)

400MST
9
ADVANCED TROUBLESHOOTING
9 – 28
2.4.8 PCB10 (WK-5479), PCB11 (WK-5479) 
1) Remove the side cover. [Reference page: 9-1]
2) Remove eight screws and four component clips. Disconnect four connectors and remove six screws,
and then remove PCB10 (WK-5479) and PCB11 (WK-5479).
 When reinstalling, remember to install new silicon rubber sheets.
2.4.9 PCB12 (WK-5527) 
1) Remove the side cover. [Reference page: 9-1]
2) Remove PCB13 (WK-5528). [Reference page: 9-29]
3) Release three hooks and remove PCB12 (WK-5527).
 Engage two hooks before reinstalling the unit.
CN2
CN2
CN1 CN1
1
2
3 Silicone Rubber Sheet
1
1
2
2
1