HP 3150 EN - Manual (Page 145)

EN Bottom assemblies 143
5 Lift the bottom plate and release the fusing assembly connector
(callout 1).
Figure 71. ECU removal (2 of 4)
6 Lift the bottom plate from the product and place it on its feet.
CAUTION Placing the ECU on a conductive surface can damage the unit. Place
the ECU on an ESD mat.
2 1