HP 3150 EN - Manual (Page 144)

142 Removal and replacement EN
ECU
Remove all covers, the RFI shield, the printer door, the LIU board, the
formatter board, the metal side plate, and the front casing.
1 Disconnect the motor connector from the motor.
2 Release all connectors from the ECU.
3 Tip the printer on its top, with the front facing you.
4 Remove the five (5) screws (callout 1) from the bottom plate.
One of the screws is a grounding screw. The location of the grounding
screw is marked by a star etched into the bottom plate.
Note Make certain when you reinstall the ECU that the grounding screw with
the washer is replaced in the same location.
Figure 70. ECU removal (1 of 4)
2 1