Lcd Board (Mpcbd20); Power Distribution Board (Msmt331 Or Msmt385); Side 1 - Intergraph StudioZ RAX System Reference Manual

LCD Board (MPCBD20)

The LCD board consists of a four-line display screen, soft-touch buttons and status LEDs that allow
users to monitor system and internal RAID status. The display screen reports various system status and
events in a software-independent manner. A +5V (always on) output powers the textual display of the
panel. System and RAID status information is available even if the system is powered off, as long as
the system is plugged in and the circuit breaker switch is in the On position.
The cable MCBL097A connects from MPCBD20 J1 to MSMT331 (or MSMT385) connector J1.
Refer to page 81 for the pinout. See table "J1, MCBL097A, LCD panel and controls."
Power Distribution Board (MSMT331 or
MSMT385)
The power distribution board is used as an interconnect between the processor board, the I/O
Expansion Board, the power supplies, the internal RAID section, and the LCD display subsystem. It
functions as a central resource through which system power and status signals are routed. The system
monitor PAL (programmable array logic) accepts status inputs from the power supply and generates the
appropriate alarms and alerts.
The board contains firmware on a PROM for the LCD menus. MSMT385 uses firmware version later
than 2.0, while MSMT331 uses version 2.0 or earlier. The two boards have the same fit and form, so
the MSMT331 can be replaced by the newer MSMT385 if necessary. The firmware contains password
code for intruder alert (InterServe 650 and 660 only). There is a fail-safe password 44234423 that can
be used in case the user-password is forgotten. The PROM can be replaced in the field without
removing the board. By default, the password is null, i.e, it has not been set. In StudioZ RAX, which
does not implement the intruder alert, the password should be left a null value at all times.
The LCD menus and intruder alert password information is provided in Chapter 3 of the System Setup.
NOTE The power distribution board has two attached stiffeners: CFAB584F on the I/O expansion board side,
and CFAB351F on the processor board side. This assembly is MESAN180.

Side 1

Board Layout
NOTE See page 88 for pinout of the power supply connectors (J4, J5, J6).
J4 J6
J5
79
J18