Carriage assembly (stapler/stacker only) 1 Remove the front cover, the back cover, and the controller PCA cover. 2 Disconnect the ribbon cable (callout 1) from the controller PCA by pressing the black tabs to release the cable. 21 Figure 195. Carriage assembly removal (1 of 2) 3 Push the ribbon cable up through the hole. EN 3,000-sheet stapler/stacker and 3,000-sheet stacker 345