Power Supply Board
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. Remove three T10 screws that secure the
Metal Shield that covers the Power Supply
The components underneath the
Metal shield represent a risk of
electric shock, once the power has
3. Remove the Metal Shield.
4. Remove the T20 screw that secures the
grounding cable to the chassis and
disconnect ALL the cables from the Power
Removal and Installation