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Functional Overview
10-3
HP DesignJet CP Series Printers
DesignJet 2500CP/3500CP PostScript SKU
The PostScript SKU will have a network interface, 20 MB of memory and a
Hard Disk Drive. Mac PostScript, Windows PostScript Drivers and HP color
kit will be provided.
DesignJet 2000CP/3500CP RTL SKU
The RTL SKU will have 8 MB of memory. It will not be able to print
large/complex HP-GL/2 or mixed files without extra memory. It will support the
HP-GL/2, PJL, PML and HP RTL languages plus VarWare. No drivers are
provided since it is intended for use with an external hardware or software RIP.
DesignJet 2800CP/3800CP
This configuration is based on a DesignJet 2000CP or 3000C connected to
an external Fiery RIP, together forming the 2800CP or 3800CP Units.
Printed Circuit Assemblies (PCA)
The printer contains a system of several PCA and cabling which link the
various sub systems. The PCA system consists of the following:
D Power Supply Unit(PSU): This is connected directly to the mains supply.
It provides 35v and 26v to the rest of the electrical system.
D Main PCA: The controller PCA. It contains the I/O connectors for
connection to the host (MAC, PC or network) which provides the data to
be printed. The processing of this data is performed by the digital
system, the processor, the control ASIC and the memory. The processed
data is then sent to the carriage and the printheads via the writing
system ASIC, while at the same time the motors and the other systems
are controlled by the periphery control ASIC.
D Carriage PCA: Connected to the main PCA via the trailing cable. The
printhead data and power comes from the main PCA. The Carriage PCA
contains two ASICs for driving the four printheads. Also on the carriage
PCA are Analogue to Digital Converters (ADCs). These monitor the
printheads, the temperature and humidity sensors and the printhead
voltages. This information is fed back to the main PCA, enabling control of
the printheads over the expected range of environmental conditions.
Additionally the Y-axis encoder signals are sent to the main PCA via the
carriage PCA.
D Front Panel Assembly: This provides the user interface to the machine.
It is connected directly to the main PCA. The front panel assembly
consists of the Vacuum Fluorescent Display (VFD), a push button
keyboard and light emitting diodes (LEDs).