Remove engine controller assembly Step 1 Remove the following assemblies: • Remove the toner cartridge. See “Toner cartridge removal and replacement” on page 96. • If installed, remove tray 3. See “Remove tray 3” on page 97. • Remove the cassette from tray 2. See “Remove the cassette from tray 2” on page 97. • Remove the DIMM cover. See “Remove DIMM cover” on page 99. • Remove the rear cover. See “Remove rear cover” on page 100. • Remove the top cover. See “Remove top cover” on page 102. • Remove the EIO card (if installed). See “Remove EIO card” on page 98. • Remove the formatter PCB. See “Remove formatter PCB” on page 112. • Remove the printer drive assembly.
See “Remove printer drive assembly” on page 134. • Unplug the two ribbon cables. See “Remove ribbon cable harness” on page 132. CAUTION The printer contains parts that are sensitive to electrostatic discharge (ESD). Always service the printer at an ESD-protected workstation or use an ESD mat. Step 2 Remove the single mounting screw (callout 1) and ground cable screw (callout 2), and unplug the harness connector (callout 3). Step 3 Lift off the engine controller assembly. 3 3 2 21 Figure 108. Remove mounting screw (shown from threaded side) C7058-90936 Internal disassembly and assembly 135