Engine controller unit 1. Remove the following assemblies. ● Scanner assembly. See Scanner assembly on page 67 . ● Left cover. See Device side covers on page 82 . ● Rear cover and fuser cover. See Rear cover and fuser cover on page 86 . ● Print cartridge door. See Print-cartridge door on page 85 . ● Front cover. See Front cover on page 88 . ● Scanner support frame. See Scanner support frame on page 95 . 2. Remove four screws (callout 1). Figure 6-56 Remove the ECU (1 of 6) 98 Chapter 6 Removal and replacement ENWW