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4.1
Identifying Jumpers
Jumpers are marked on the main logic board with part numbers. For example, the
serial port jumpers are marked J2104 and J2105. Jumper pins are located
immediately adjacent to the part number. Pin 1 is marked with an asterisk in any of
the positions shown in the following figure.
J 2 X X X
*
*
*
FIGURE 4-2
4.2
Flash PROM Jumpers
The Ultra 2 Series system uses flash PROMs. Flash PROMs permit the following:
Reprogramming of specific code blocks
Remote reprogramming of the PROM chip by a system administrator over a local
area network
The default shunt setting of J2002 is on pins 1 and 2. This selects the flash PROM
chip as the controlling firmware device. See
The default shunt setting of J2003 is on pins 1 and 2. This disables the flash PROM
chip from being reprogrammed. Placing the shunt on pins 2 and 3 enables
reprogramming of the flash PROM chip.
Part number
Pins
*
*
*
Identifying Jumper Pins
.
FIGURE 4-1
Chapter 4
Main Logic Board Jumpers
4-3
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