Dual (Fcc) Cabinet Inter-Cabinet Cabling; Cpu Verification & Top-Hat Installation; Memory Board Installation Procedure. Cccccesscccsccvce - Prime Computer 50 Series Service Manual

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Installation
Prime Proprietary
2.8.2.2 Dual (FCC) Cabinet Inter-Cabinet Cabling
Cable the inter-cabinet cables as follows:
1.
Locate and install the six ribbon cables used for interchassis I/O
connection (Figures 2-7 and 2-12).
2.
Install the cable from connectors B and C of the status
panel
to
connector Ji2 of the PDU (Figure 2-10).
3.
Install the cable fran blower assembly 2 to connector
J8
of
the
PDU (Figure 2-12).
2.8.3 CPU VERIFICATION & TOP-HAT INSTALLATION
The
typical
50
Series configurations are shown in Figures 2-8, 2-13
and 2-14.
To install the top-hat connectors:
1.
Verify that the boards are in their proper slots.
2.
Inspect the top-hats for damage to the housing and pins.
Do
not
attempt to install defective top-hats.
3.
Install the top-hat connectors on the CPU boards.
Verify that the
top-hats are firmly seated and that the CPU boards
are
installed
in their proper slots.
CAUTION
The
correct
way
to
install the top-hat is to put it on the
uppermost board of the set.
Move the
top-hat
fron
side
to
side
until
it
centers
with
minimal pressure and snaps on.
Once the first connection is made, the other
connectors
will
snap on easily.
Do not bang the top hat on.
2.8.4 MEMORY BOARD INSTALLATION PROCEDURE
The
E6,
E7, E8 and E9 wide word memory boards (2 x 16-bit words) are
the standard memory for the
50
Series
machines.
Wide-word
memory
allows
two
words
(32 bits) to be transferred at one time.
Standard
memory allows one word (16
bits)
to
be
transferred
at
one
time.
Switch
settings allow the memory boards to operate with the different
types of CPUs.
The wide-word memory provides the same functionality as
the
12128-K4
ECC
memory.
It
also has the capability of using the memory address
bus for a data word transfer.
This capability allows for
two
memory
locations
to be transferred at the same time:
one on the address bus
and one on the data bus.
070-C
2-
20

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