Phaser 840, 850 And 860 Printer Differences - Xerox Phaser 840 Service Manual

Phaser 840, 850 and 860 Printer Differences

There are additional part differences not detailed in this table.
Note
Please refer to "FRU Parts List", on page 8-207 for a complete
listing of parts and part numbers.
Table 1-7 Summary of differences between Phaser 840/850/860
Phaser 840 Part
Description
Main board
RAM DIMMs
Power control
board
Printhead
Y-axis pulley
assembly
Cap/wipe/purge
assembly
Preheater entry
flags
840 to 850 Difference
The main board is based on a 603E
processor at 200 MHz. It features a
new rear panel with built-in
10/100BaseT and no SCSI port or
riser card. The large Dallas NVRAM
chip is no longer used. Also the
RAM connectors are angled. A
battery on the main board will
support the real-time clock (10 year
life). The printer supports up to 256
Mbytes of RAM. Only a Token Ring
Card and an IDE Internal Hard Drive
are available.
Phaser 850 printer is not as
restricted on the height of the RAM
DIMMs the main board will accept
since it uses angled RAM DIMM
connectors. PC66 compliant.
Improved fusing. Resettable fuses
(by disconnecting AC power) on +5v
and +40v High-Capacity Paper Tray
leads. No x-axis fuse.
The Phaser 850 printhead mount
has been factory calibrated so no
head-to-drum adjustment is required
when installing the printhead (as
long as the printhead's four
mounting screws have not been
loosened nor the printhead tilt
setting altered on the left side of the
frame).
The Y-axis pulley assembly now
features a built-in spring tension. A
Y-axis belt tension tool is not
required.
This is a new assembly. It also uses
a new mounting system that does
not require the disassembling of the
timing belts in order to remove the
cap/wipe/purge assembly
New sensor flags, less prone to
snagging paper when jammed paper
is pulled from the printer, are
mounted on the upper feed roller
assembly.
850 to 860 Difference
The 8240 processor at 250 MHz.
Internal Hard drive now mounted
on the main board.
No network cards are supported.
Code ROM is usually soldered
down.
Easier insertion.
New integrated ASICs.
Uses the smaller 144-pin
SODIMMs.
PC100 compliant.
40V service load connector no
longer needed.
Internal changes to support new
®
ColorStix II ink.
New Y-Axis pulley assembly
made of aluminum to imporve
print quality and reduce noise.
General Information 1 - 29