Perkin Elmer Nelson 1020 data acquisition system for DSC 7 calorimeter - need help!

Hello to everybody,
I need assistance for repairing a data acquisition system from Perkin Elmer:

PE Nelson 1020 series
CPU Intel 8088

This is an old system for controlling the PE DSC 7 calorimeter. The floppy disk drive and the printer interface are not working anymore.

Please, I need schematics and/or manual for this device. Also an alternative board/project for connecting the DSC 7 machine to Windows based PC could help.

Thanks in advance!

Kindest regards