HP DESIGNJET 3D, Service Manual

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-7
Single Board Computer
The single board computer (SBC) is the main processor in the system. See
(Figure ) showing the board layout.
The TCP/IP network interface connects directly to the RJ-45 connector on the
SBC. The network interface supports both 10baseT and 100baseT operation.
The hardware differentiates automatically. There are two LED’s at the RJ-45
connector. These show the status of the network connection as follows:
• Green LED: Indicates there is a network connection present.
• Amber LED: Indicates there is a network communication.
The Hard Disk Drive (HDD) connects to the SBC with a standard IDE
interface (ribbon cable). The HDD contains the Linux operating system and
all the control software needed to run the system (except the controller
firmware). This is also where all the downloaded models are stored in the
queue.
The LCD Control Panel connects to the I/O Card. The signals then travel
though the PDB and on to the SBC. All user entered commands from the
control panel buttons are routed through the I/O and PDB and then on to the
SBC.
The P104 connector on the top edge of the board is a bus level interface to
the controller board. This allows the SBC to read and write to the dual port
ram on the controller board, which forms the communication channel
between the two boards.
Figure 2: Single board computer detail
J2 power
input
SATA
Connector P104
Connector
Display Panel
DB-9
Connector
RJ-45
Network
Connector