5
Figure 2 Switching Power Supply Circuit Board Layout
Step 4: Remove the
Existing Pulse Transformer
Board
1. Disconnect the (red and white) gate leads from connectors XP1 and XP2 at
the top-left corner of the board.
2. Disconnect the appropriate gate leads from the pulse transformer board (see
below):
– For non-regenerative drives, each pair of (red and white) gate lead cables
from connectors KG1…KG6.
– For regenerative drives, each pair of (red and white) gate lead cables from
connectors KG1…KG6 and KG01…KG06.
3. Disconnect the cables from the following connectors: XUV, XCD_IO,
XUVW, XCD, XR, XTA, X4 and XSPF. Also, carefully remove the ribbon
cable (from XR) from the cable standoff on the board.
4. Remove the plug-in terminal block at the bottom of the pulse transformer
board.
5. Remove the two hexagonal standoffs and washers from the pulse
transformer board.
6. Remove the six hexalobular screws that secure the pulse transformer board
to the control pan and remove the board.
XA
1
2
15
16
XSW
1
4
XSW1
1
4
XV
F1
1C2
1D2
XUV
1
6
T15
Tightening torque:
1.0…1.2 N•m
(9…10.5 lb•in)
