21 24 2 23 25 Figure 122. Rear of printer with formatter pan removed 1 Delivery drive assembly 4 Separation discharge high- voltage converter PCA 2 Lower air duct 3 Main motor (M4) 5 Separation discharge high- voltage converter The main relay PCA is behind the high-voltage power supply. The main gear assembly is behind the developer/imaging drum bias supply. The tray 2 and tray 3 media size sensing PCAs are located behind the power supply. EN Rear assemblies 271