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TROUBLESHOOTING & REPAIR
T4 AUXILIARY TRANSFORMER TEST (continued)
FIGURE F.3 – OUTPUT CHOKE/IGBT MODULE SPLICED CONNECTION
LOWER | OUTPUT CHOKE/ | |
DARLINGTON MODULE | ||
TRAY | ||
SPLICED CONNECTION | ||
AREA | ||
|
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TEST PROCEDURE
1.Turn off the Invertec STT and disconnect main AC input power to the machine.
2.Using the 5/16" nut driver, remove the case wraparound cover.
3.Perform the Input Filter Capacitor Discharge Procedure. See the Maintenance section.
WARNING
ELECTRIC SHOCK can kill.
• Before continuing with the test procedure, per- form the capacitor dis- charge procedure to avoid electric shock.
4.Locate the lead connection splice from the output choke to the IGBT module. Remove the insulating sleeve. Cut any necessary cable ties. Using the 7/16" wrench, discon- nect the lead splice. Thread the lower lead down into the lower tray assembly area. See Figure F.3.
