2-2
9845B/C Environmental, Installation,
and
Preventive Maintenance Requirements
9845B/C
Installation
Introduction
The following pages cover installation, maintenance, and system testing for the HP 9845B
and
HP
9845C
Desktop Computers. Where similar, the computers are referred to as the "System
45"
or
the
"9845".
Any differences between computers
or
models are noted when necessary.
The following table shows the configuration
for the model numbers which are referred to.
Standard
Processor
Enhanced Processor
Monochromatic
CRT
(98750A)
98458
Model 100
Monochromatic CRT
With Enhanced Graphics
(98780A)
98458 Model 200
Color CRT
(98770A)
9845C Model 100
9845C Model
200
There are other models which are based
on
the model numbers
in
the previous table. The
9845B Model
150, for instance,
is
a 9845B Model 100 with a thermal printer, two tape drives,
graphics,
and
187
K-bytes of read/write memory. For simplicity, this manual refers to Models
100
and
200
only.
If
you have a 9845B Model 150, just remember that your computer
is
referred to as the 9845B Model 100
in
this manual.
Table Mounting
The System
45
mainframe can
be
attached to a table top by replacing each foot with an
internally threaded device
and
bolting up through the table top. Bolting the main frame to a
desk which has a lockable drawer secures the computer from theft. Care must be taken
in
laying
out the bolt holes so that the front edge of the computer overhangs the edge of the table top.
This ensures that the air filters can
still
be removed and cleaned.
The computer can
be
secured to the top of a table or desk
in
the following manner:
•
Drill
four holes in the top surface of a table to accommodate 5/16-24 NF-2A screws
according to the following diagram.
• Replace the four rubber feet attached to the bottom of the computer with the four hex-
agonal spacers supplied with the Table Mounting Accessory
(P/N 09845-61201), using the
6-19X.
438
Pan Head, Pozidrive, Plastite screws, also supplied.
• Attach the computer to the table top, using four 5/16-24 NF-2A machine screws that are
3/8 inch longer than the thickness of the table top. The hexagonal spacers should
be
held
with a wrench while these screws are tightened to prevent stripping the smaller screws out
of the plastic base.
• The keyboard should extend
8.25
inches
in
front of the table top, as shown, to make the
air filters accessible for periodic cleaning
or
replacement.
NOTE:
ALL
OIMENSIONS
IN
INCHES
1.25
~
______________
1
FRONT
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