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Functional Overview
10-4
HP DesignJets 500, 510 and 800 Series Printers Service Manual
Electrical System
Introduction
The Printer’s engine electronics (Main PCA) is controlled by a Kayak
ASIC. Kayak is the application-specific integrated circuit (ASIC),
designed in Hewlett-Packard’s Vancouver Printer Division, forming
the heart of the thermal-inkjet large format printer digital electronics.
Hardware Description
The Kayak ASIC is fed with a 15.975MHz crystal-quartz which
through a phase lock loop (PLL) is raised to 192MHz and after
that divided to the ColdFire frequency of 96MHz and further
divided to the external memory bus of 48MHz.
The Kayak ASIC incorporates the CF3_g Motorola CF3MRSX
processor mega cell. As implemented in Kayak, the processor,
with 8KB of unified cache, has a maximum operating frequency
of 98MHz and at this frequency it is capable of approx. 70 MIPS.
Two physical EIO slots are supported from which the optional
formatters and EIO cards will be plugged. Three expansion
options are currently supported.
The Main PCA will come with an on-board 4MB flash memory
that will allow both the end user and service engineers to upgrade
with the latest firmware code available.
A total of 16MB SDRAM (x32) or 32MB SDRAM (depending
on the Printer Model) will be loaded in the engine PCA, not
allowing further user self-memory upgrades.
LAN Card
Formatter
Main PCA
Electronics Enclosure
Cooling Fan