HP 450c Service Manual - Page 145

Removing the Media Motor Assembly, Remove the Mounting Bracket complete with the Media Motor Assembly.

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Removing the Media Motor Assembly Refer to figure 8. Removal 1. Remove the spittoon ' page 8Ć20. 2. Remove the DriveĆRoller Gear ' page 8Ć22. 3. Disconnect the mediaĆmotor cable and the flat mediaĆaxisĆencoder cable from the main PCA (connectors labeled MOT X and ENC X respectively), and from the clip at the back of the Printer. 4. Remove the three screws (item 1) and washers (item 2) that secure the mounting bracket (item 3) to the Printer Chassis. 5. Remove the Mounting Bracket complete with the Media Motor Assembly. Reassembling: The worm pinion and driveĆroller gear mesh slightly during use. Don't install a new motor and an old gear, or vice versa: install the gear that comes with the motor. Apply the grease that comes with the new motor to the worm pinion and driveĆroller gear. Calibration: After having reassembled the Printer, perform the accuracy calibration (Details ' chapter 5.) 3 1 2 Figure 8: Media Motor Assembly Removal and Installation HP DesignJet 430, 450C and 455CA Printers 8-23

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Removal and Installation
8-23
HP DesignJet 430, 450C and 455CA Printers
Removing the Media Motor Assembly
Refer to figure 8.
Removal
1.
Remove the spittoon
'
page 8Ć20.
2.
Remove the DriveĆRoller Gear
'
page 8Ć22.
3.
Disconnect the mediaĆmotor cable and the flat mediaĆaxisĆencoder cable
from the main PCA (connectors labeled
MOT X
and
ENC X
respectively), and
from the clip at the back of the Printer.
4.
Remove the three screws (item 1) and washers (item 2) that secure the
mounting bracket (item 3) to the Printer Chassis.
5.
Remove the Mounting Bracket complete with the Media Motor Assembly.
Reassembling:
The worm pinion and driveĆroller gear mesh slightly
during use. Don't install a new motor and an old gear, or vice versa:
install the gear that comes with the motor.
Apply the grease that
comes with the new motor to the worm pinion and driveĆroller gear.
Calibration:
After having reassembled the Printer, perform the
accuracy calibration (Details
'
chapter 5.)
1
2
3
Figure 8: Media Motor Assembly