Printhead-To-Drum Spacing Adjustment (Phaser 840 Printer Only) - Xerox Phaser 840 Service Manual

Printhead-to-drum spacing adjustment
(Phaser 840 Printer Only)
Tools required:
Printhead-to-drum gap clips and springs
I
Magnetic screwdriver
I
9/64 in. hex tip
I
Make this adjustment after removing or replacing the printhead.
The Phaser 850 and 860 printheads should never be adjusted. If
Note
the printhead is known to be out of adjustment, it should be
replaced.
If not already removed, remove the top cover and the metal heat cover.
1.
Tilt the printhead to its print position and, if previously removed, attach the head tilt
2.
spring.
For the "hot" adjustment, scroll to the printer's hidden service support menu. (To enter
3.
the hidden menu, scroll to the Troubleshooting menu and press Select. Press and
hold the left arrow button. While holding the left arrow button; press Select.)
Activate the menu's Head-to-Drum Adjust routine. The routine automatically centers
the printhead, and brings the printhead and drum to their operating temperatures. (If
the printhead fails to tilt back momentarily when Head-to-Drum Adjust is selected, exit
and re-enter the adjustment mode to ensure the adjustment is performed accurately.)
Lift the ink loader up and back slightly so that the printhead can be accessed. Do not
4.
unplug the printhead.
If not already tightened, tighten the printhead mounting screws to 20 in- lbs.
5.
Tilt the printhead back and install a gap clip on each end of the printhead. When
6.
installed properly, each clips hooks under BOTH metal edges on the corner of the
printhead and touches the hard stop (the inner edge of the sheet metal notch). Try
wiggling the clips sideways. If properly installed they will not snap off.
Fig 4-5 Attaching clips.
4 - 146 Phaser 840/850/860/8200 Color Printer - Service Manual
.
Clips should
touch hard
stop
Partially Fully
installed installed
Small (3/16 in.) flat-blade screwdriver
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T-20 TORX tip
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Attach a gap clip to each
end of the printhead.
Hook under
both metal
edges
0388-85