Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 123

F-63
FIELD EFFECT TRANSISTOR/SWITCH BOARD TEST (continued)
FIGURE F.23 - SWITCH BOARD ASSEMBLY CONNECTION DECAL
TROUBLESHOOTING & REPAIR
3W
TOP
3R
406
3T
12C
9C
4T
405
4R
4W
3W
3R
408
3B
12D
9D
4B
407
4R
4W
M16740
POWER WAVE 450
2W
2R
401
2T
9A
12A
1T
402
1R
1W
2W
2R
403
2B
9B
12B
1B
404
1R
1W
F-63
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