Rockwell Automation 20P PowerFlex DC Drive - Frame A SCR Modules for Drives with Bus Bars - Manual (Page 6)

6 PowerFlex® DC Drive - Frame A SCR Modules for Drives with Bus Bars
3. Remove the five screws (and ground wire on the lower left corner of
board) that secure the Control EMI shield and Control board to the
chassis and slide the Control EMI shield and Control board up and out
of the drive.
Important: Be careful when removing the EMI shield not to pull free
any of the gate leads or other cables on the Pulse
Transformer circuit board below the EMI shield.
Remove
screws
Remove
screw and
ground wire