Tektronix Phaser 840, Quick Reference Manual

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Phaser 840 Color Printer
Printhead-to-drum spacing adjustment
This procedure assures that the printhead is the proper distance from the drum.
Make this adjustment after removing or replacing the printhead.
1. Remove the top cover. Remove the metal heat cover.
2. Tilt the printhead to its print position and, if removed, attach the head
tilt spring.
3. For the “hot” adjustment, scroll to the printer’s hidden service support
menu. Activate the diagnostic’s Printhead to Drum Gap Adjustment
(Hot) routine. The routine automatically centers the printhead, and
brings the printhead and drum to their operating temperatures.
4. Lift the ink loader up and back slightly so that the printhead can be
accessed. Do not unplug the printhead.
5. If not already tightened, tighten the printhead mounting screws to
20 in- lbs.
6. If not already loose, loosen the printhead’s four locking screws (two at
each end of the printhead until they are just snug in place.
7.
Install the digital gap indicator and bracket to the left side of the printer
frame and tilt arm. Ensure the digital indicator is set to inches, “in.”
Press
Origin to zero the digital indicator.
Tool required
■
Printhead-to-drum gap tools
■
Small (3/16 in.) flat-blade screwdriver
■
9/64 in. hex tip
■
Magnetic screwdriver
■
T-20 TORX tip
Attaching the digital gap indicator
0388-31
0388-36
Secure indicator
in place with screw
provided in frame
Attach bracket
in forward most
position to tilt
arm. Ensure a
flush fit.
Place indicator
bracket over
hex-screw
Attach digital gap
indicator to side
frame