Intermec EasyCoder PD4 Installation Instructions page 3

6 Move the balance boxes to the center position, to facilitate the removal of
the adapter PCB.
7 Use an appropriate tool, for example a slotted screwdriver, to carefully
pry the printhead cable connector loose from the adapter PCB.
8 Remove the two screws that attach the adapter PCB to the printer.
Remove the adapter PCB.
9 Attach the new adapter PCB with the two screws removed in Step 8.
10 Connect the printhead cable to the adapter PCB.
11 Insert the new printhead and connect it to the adapter PCB.
12 Adjust the position of the balance boxes so that they fit the width of your
media.