Tektronix Phaser 840, Quick Reference Manual

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Service Guide
3
The printer features Job Accounting, which maintains from 50 to 5000 records of
processed print jobs, depending on memory options and hard drive options. The
record contains information such as time and duration of the print and the
percentage of color coverage on the print. The log of records can be retrieved
using PhaserLink or PhaserShare.
Solid inks
Solid inks, sometimes called phase-change inks, are solid at room temperature
and are liquid at the higher temperature used during printing. The inks solidify
almost instantly after being jetted onto the printer’s drum. Because Tektronix'
proprietary solid inks bleed much less than ordinary liquid inks, they allow the
printer to print brilliant colors on plain paper. Each Tektronix solid-ink printer
inks are especially formulated for that printer; the inks are not interchangeable.
Note Turning the printer off and allowing it to cool causes it to perform
a printhead cleaning and purge cycle upon power-up. The
printer's purge cycle consumes a significant amount of ink.
During normal use and servicing, turn the printer off and allow it
to cool only when necessary.
About RAM upgrades
The printer features two DIMM connectors which accept both 32-, or 64-Mbytes
RAM DIMMs (16-Mbyte RAM DIMMs work but are not offered). The printer can
use SDRAM DIMMs meeting these specifications:
■
168-pin DIMM
■ Synchronous DRAM
■
3.3 volts
■
10 nsec speed
■
Valid on-board Serial Presence Detect ROM
■ Unbuffered
■
Latency of 2
■
9 address columns
■
Maximum of 2.8 cm (1.1 in.) in height. SDRAM DIMMs from other
Phaser printers, such as the Phaser 740 and Phaser 780 color printers
may be too tall to fit inside a Phaser 840 printer.
Upon power-up, the image processor interrogates the 256 byte Serial Presence
Detect ROM, which describes the DIMM in great detail, such as data width, clock
delay, number of address columns and row, refresh rate and more. If the DIMM
does not meet the required specifications, it will be ignored; no error message will
be reported.