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F-22

F-22

TROUBLESHOOTING & REPAIR

T4 AUXILIARY TRANSFORMER TEST (continued)

FIGURE F.6 – STT ON ITS RIGHT SIDE

MOUNTING

BOLTS (5)

7.

Carefully lift and tilt the Invertec STT

9. Carefully slide out and support the lower tray

 

machine onto its right side. See Figure F.6.

assembly for testing purposes.

8.

Using the 7/16" wrench, remove the five

10. Locate and remove plug J13 from the

 

bolts holding the lower tray assembly to the

IGBT drive board. See Figure F.7.

 

case bottom.

 

FIGURE F.7 – PLUG J13 LOCATION

IGBT

DRIVE BOARD

PLUG J13

T4 AUXILIARY

TRANSFORMER

STT II

INVERTEC STT

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Image 60
Lincoln Electric SVM129-B service manual Stt