Switch off the printer, the scanner, and the PC, and then disconnect them from
the power source prior to performing any maintenance.
HP Designjet T1100 MFP, 4500mfp, 4500 Scanner, 820 MFP Service Manual
1. Remove the Top Cover ⇒ Page 4-5.
2. Pull out the metal paper bin to gain access
to the Fan Filter.
3. Unclip the Fan Filter from underneath the
4. Gripping the nuts from the top, remove the
four T20 screws from the bottom that
secure the Fan.
Removal and Installation