Tektronix PHASER 380, Service Manual

Page: 112 / 346

5-10
Phaser 380 Color Printer
5
Theory of Operation
Tilting the printhead back creates room for the cap/wipe/purge assembly to be
moved into position in front of the printhead faceplate. Additionally, tilting the
printhead back allows it to engage the transit restraint assembly (when
manually actuated) which locks the printhead in its tilted-back position.
There is a mechanical interlock which prohibits the X-axis from disengaging the
head tilt arm when the printhead is tilted back more than 5 degrees.
Figure 5-5 The printhead tilting mechanism
Printhead
maintenance position
Printhead
Drum
Printhead
print position
Cam
follower pin
Cam gear positions
Print
positon
Maximum
tilt back
Wipe
Cap/purge
9661-74
Tilt cam gear
Cam groove
X-axis pivot point