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Rockwell Automation Publication 20P-TG001C-EN-P - February 2018
Chapter 3
Part Replacement Procedures
Pulse Transformer and
Switching Power Supply
Circuit Boards Replacement
Remove the Pulse Transformer and Switching Power Supply Circuit
Boards
The switching power supply circuit board is on the back of the pulse
transformer circuit board. You must remove both boards to replace either
board. Follow these steps to remove the pulse transformer and switching power
supply circuit boards.
1. Read the General Safety Precautions on page
2. Remove power from the drive (see page
3. Remove the protective covers (see page
).
4. Remove the control EMI shield and control board (see page
5. Remove the slotted air flow plate from the top of the drive.
• For 38 A/10 Hp and 55 A/15 Hp drives with 230V AC input and 35
A/20 Hp, 45 A/25 Hp, and 52 A/30 Hp drives with 460V AC input,
remove the four screws that secure the slotted air flow plate to the top
of the drive.
• Remove the fan cable from connector XV on the switching power
supply board and remove the plate.
5
=
Tightening torque:
1.0 N•m (8.9 lb•in)