Ram And Printer Capabilities; Installed Ram And Printer Capabilities - Tektronix Z740/N - Phaser 740 Color Laser Printer Service Manual

RAM and printer capabilities

The printer features two DIMM connectors which accept both 16-, 32-, 64-, and 128-
Mbytes RAM DIMMs. The printer can use off-the-shelf RAM meeting these
specifications:
168-pin DIMM
Synchronous DRAM
3.3 volt
9 nsec speed
Valid on-board Serial Presence Detect ROM.
The Configuration Page lists the amount of installed RAM and the details; such as
type, parity, size, and manufacturer, about the DIMM installed in each slot.
Upon power-up, the image processor interrogates the 256 byte Serial Presence Detect
ROM which describes the DIMM with details such as data width, clock delay, number
of address columns and row, refresh rate and more. If the DIMM does not meets the
required specifications it will be ignored; no error message will be reported.
With more memory the printer gains the capabilities of printing at higher resolutions,
printing without having to use image compression (which trades off less installed
RAM for longer image processing time) and dual frame buffers for printing one image
while processing a second image (which gives greater printing throughput). With
additional RAM memory the printer's capabilities increase as detailed in the
following table:

Installed RAM and printer capabilities

Feature
600 x 600 dpi
1200 x 1200 dpi
Pipelining
Frame buffer
Check print
Collation
(requires hard
drive)
4
Phaser 740 Color Printer
16 Mbytes 32 Mbytes
Color/mono Color/mono
Black and white Black and white
only only
1 Letter size 1 Letter size
image with image with no
compression compression
64 MBytes 80 Mbyte
Color/mono Color/mono
Color and black Color and black
and white and white
Yes, if SCSI Yes, if SCSI
board installed board installed
2 Letter-size 2 Letter-sized
images with frame buffers
compression with no image
compression
Yes, if SCSI Yes, if SCSI
board installed board installed
Yes, if SCSI Yes, if SCSI
board installed board installed