Troubleshooting
3 - 77
5.
The process motor is activated to rotate the head tilt gear into its home position. (If the
printhead is in the locked position it will not tilt forward.) The process motor also
rotates all the rollers to their ready positions, disengage the transfix roller, and lower
the maintenance drawer blade and wiper.
6.
The x-axis motor activates to move printhead off its locking post. The x-axis motor
activates for three short bursts to ensure the printhead is in its far-left travel (printhead
home position). Then the x-axis motor is reversed to move the printhead to the center
the of the x-axis travel.
7.
The process motor is again activated to tilt the printhead forward into the print position.
The drum is rotated to sense it home position. (The Phaser 850 printer uses a slower
rotation to find its home position.)
8.
A short cap/wipe/purge assembly motion is performed and the assembly is returned to
its home position.
9.
After the print engine is in a known, valid state, the AC heaters are enabled and the
front panel display shows the warm-up progress. The Ready LED flashes; when
warm-up completes, the Ready LED lights solid.
10.
The drum begins to rotate.
11.
If the temperature of the printhead ink reservoirs or jetstack are below the purge
threshold, then the printer performs a head clean cycle.
a.
When the ink in the printhead is molten and printhead temperatures are
correct, the cap/wipe/purge assembly is positioned to the purge position.
b.
The printhead tilts forward against the cap/wipe/purge assembly and a
purge cycle begins.
c.
The front panel indicates the printer is in a clean cycle.
d.
If the printer senses ink or debris on the drum, a drum cleaning page is
printed (Phaser 840 printer only).
12.
The temperature of the printhead, drum and paper preheater are allowed to stabilize at
their operating temperatures and ink is melted if needed.
13.
If needed, a cleaning page is printed at this time.
14.
A start page is printed (if enabled).
15.
The front panel displays a message that the printer is initializing and then ready.
The print engine is initialized.
Summary of Contents for Phaser 840
Page 2: ......
Page 12: ...vi Phaser 840 850 860 8200 Color Printer Service Manual ...
Page 52: ...1 36 Phaser 840 850 860 8200 Color Printer Service Manual ...
Page 88: ...2 72 Phaser 840 850 860 8200 Color Printer Service Manual Blank Page ...
Page 134: ...3 118 Phaser 840 850 860 8200 Color Printer Service Manual ...
Page 174: ...4 158 Phaser 840 850 860 8200 Color Printer Service Manual ...
Page 188: ......
Page 250: ...8 234 Phaser 840 850 860 8200 Color Printer Service Manual ...
Page 286: ...270 Phaser 840 850 860 8200 Color Printer Service Manual ...
Page 287: ...071 0723 00 ...