HP 3150 EN - Manual (Page 124)

122 Removal and replacement EN
Paper exit sensor flag
1 Remove all covers, the RFI shield, the printer door, the exit roller,
the delivery assembly, and fuser pressure plate.
Note Before proceeding, examine the paper exit sensor flag. It is important
to note the position of the spring mechanism on the flag. The spring
must be reinstalled to exactly this position, because installing it
incorrectly will cause a control panel error message.
2 Remove the paper exit sensor flag by pressing down on the left
side and pulling up on the right side.
To reinstall
Place the left side of the flag in the correct position first, then slide the
right side into place, making certain the spring is on top of the flag. If
the spring exerts no pressure on the flag, it may require respringing
by giving the spring an extra turn before reinstalling. The flag should
fit snugly in place.
Figure 50. Paper exit sensor flag replacement