Sw2; Sw5; Sw6; Memory - HP Designjet 3D Service Manual

SW2

Number (in white) Description
16-24 Unused

SW5

Number (in white) Description
8- 1 5 Unused

SW6

Number (in white) Description
0 Run built-in self test (BIST)
1 Load Firmware (turn on when using SND-
BIN.EXE)
2 Disable door latching
3 Unused
4 Don't reset controller when in command is
issued
5 Disable WatchDog timer
6 Enable use of dc commands
7 Unused

Memory

There are three types of memory contained on the controller board.
• Dual Port RAM: The communication buffer between the controller
board and the single board computer. Events (from the controller),
commands (from the SBC), and motion control vertices (from the
SBC) are passed through the P104 connector joining the two
boards.
• Flash Memory: Where the executable code resides.
Battery backup RAM; Where the controller board stores the following system
parameters:
1. Results of last power-on self test (POST)
2. Results of certain built-in diagnostic tests, if used
3. Exception trace, which is a list of the most recent exception messages
logged on the controller board
4. State information, which stores printer state when it is powered off
(includes things like the type of gantry, whether material is loaded,
the UDN, etc.).

LEDs

There are 1 1 LEDs located on the controller board. A grouping of three (D1-
D3) are located on the lower left side. The other group of eight (D6-D13) are
located on the upper right side. D1-D3 are lit when their associated voltage,
as shown in table below, is present. The 3.3 VDC supply is generated on the
Default
Off
Default
Off
Default
Off
Off
Off
Off
Off
Off
Off
Off
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