DP-28C Chip Replacement Instructions Step #1: Unplug the power cord of the DP-28C Step #2: Expand the sides of the DP28C (the circuit board is fitted into slots). When you expand the sides of the shell the circuit board will come out. Step #3: Before removing the board you have to disconnect the AC power cord from its connection. Simply pull the white connector away from the board. Step #4: Now that the board is free from the shell, place the board in front of you with the screw terminals facing you.
