HP 3150 EN - Manual (Page 127)

EN Internal assemblies 125
3 Remove the solenoid connector (callout 1) from the ECU.
4 Remove the self-tapping screw (callout 2) that holds the solenoid
in place.
5 Unthread the wires from the printer chassis.
6 Lift the solenoid off.
Figure 53. Solenoid removal (2 of 2)
To reinstall
The paper pickup gear is keyed to go on the shaft in only one way.
2
2
1
2