HP DesignJet 3000/3500 CP Printer User's Guide - C4724-90051

Working with Media
Take Up Reel loading
3-21
2 Move the adjustment levers on the media guides to the unlocked position.
3 The two media guides and core must be positioned on the spindle so that the media
is in the center, between the media guides. Adjust the media guides as shown below.
The media guides may be slightly stiff on the spindle, you may have to use both
hands.
4 When the adjustment is made, pull the adjustment levers to the locked position.
C472351
Adjustment
lever
C472366