Xerox Phaser 840 Service Manual page 46

Table 1-7 Summary of differences between Phaser 840/850/860
Phaser 840 Part
Description
Left I/O board
Right I/O board
Y-axis drum
encoder assembly
Lower stripper
blade holder and
stripper blade
Rollers and
clutches
Preheater
Inks
Ink is NOT
interchangeable
between models.
Legal Tray w/Bail
High-Capacity
Paper Tray
Assembly
Front Panel Display
1 - 30 Phaser 840/850/860/8200 Color Printer - Service Manual
840 to 850 Difference
A new left I/O board.
A new Y-axis drum encoder is used,
which does not use a separate drum
home sensor.
The lower stripper fingers of the
have been replaced with a
replaceable stripper blade, called a
rapid release guide, and a guide
holder which is backward compatible
to the Phaser 840.
Phaser 850 roller shafts are
re-tooled for clutches with C-clips
instead of the Phaser 840 printer's
snap-fit feature. The parts are
reversed compatible only if the shaft,
clutch and e-ring combination
replace the Phaser 840 parts. The
bushings for the Phaser 850's
duplex roller are installed with
C-clips from the inside of the
chassis.
A new Drum Maintenance clutch is
used in the Phaser 850 printer to
dramatically improve reliability.
A new paper preheater designed to
accommodate the travel of the paper
preheater entry flags is used in the
Phaser 850 printer. The preheater
is reverse compatible into the
Phaser 840 printer.
The Phaser 850 printer uses new
inks using a different formulation.
850 to 860 Difference
New board to support the new
front panel.
Color change.
Round pick roller to improve
reliablility.
The pick roller now uses the
same clutch as the upper feed
roller and the cap/wip/purge
drive.
New Drum Maintenace Cam to
support new Drum Maintenance
alogrithms.
®
New ColorStix II formulation
specific to the Phaser 860.
New feature for the Phaser 860
only.
Reliability improvements. These
improvements are also being
made on the Phaser 840 and
850.
Improved design for ease of
navigation.
Service diagnostics are
accessible through the Front
Panel, for more information refer
to "Front Panel Shortcuts", on
page 4-119.
Reduced ESD susceptibility.