IBM 4332-004 - InfoPrint 40 B/W Laser Printer User Manual page 198

2. Unplug the printer.
3. Remove the power cord from the back of the printer.
4. Unplug the 2500-Sheet Input Unit connecting cable from the printer.
5. Remove Tray 2 from the printer base unit and Tray 3 from the 2500-Sheet
Input Unit.
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Infoprint 32 and Infoprint 40: User's Guide