Manuals and User Guides for Lexmark X644E - With Modem Taa/gov. We have 22 Lexmark X644E - With Modem Taa/gov manuals available for free PDF download: Service Manual, Technical Reference Manual, User Manual, Compatibility Manual, Manual, Menus And Messages Manual, Setup Manual, Administrator's Manual, Copying Manual, Function Manual, Troubleshooting Manual, Quick Reference Manual, Specifications