Model 7475A
Section I
SECTION I
GENERAL INFORMATION
1-1. INTRODUCTION
1-2.
This
service
manual
contains
information nec-
essary to
test
and
service
the
Hewlett-Packard Model
7475A Plotter. This
manual
is divided into six sections
as
follows:
I GENERAL INFORMATION
II
OPERATING AND PERFORMANCE TESTS
III
ADJUSTMENTS
IV
REPLACEABLE PARTS
V PRODUCT HISTORY
VI
SERVICE
1-3.
Information for interfacing, operating,
and
pro-
gramming the Model 7475A is contained
in
the following
publications:
HP
Title
Part
Number
Interfacing
and
Programming Manual
07475-90001
Operation
and
Interconnection Manual
07475-90002
Programmer's Reference Card
07475-90004
1-4.
This
General Information section includes a
de-
scription
of
the
plotter,
its
specifications, options avail-
able, accessories supplied,
and
general
installation
instructions.
1-5. SPECIFICATIONS
1-6.
Table
1-1
lists
the
specifications for
the
Model
7475A.
These
specifications include
the
performance
standards
against
which
the
plotter
is
tested.
1-7.
Also
included
in
Table
1-1
are
supplemental
characteristics.
Supplemental
characteristics
are
not
specifications
but
are
typical characteristics included
as
additional information for the user.
1-8. SAFETY CONSIDERATIONS
1-9.
Safety information relevant to
the
service proce-
dure being described is provided
in
the
appropriate sec-
tions
of
this
manual.
The
Model 7475A
and
this
manual
should be reviewed for safety
markings
and
instructions
before service work is begun.
Table
1-1.
Specifications
PERFORMANCE
SPECIFICATIONS
Repeatability
With the same pen:
0.1
mm
(0.004
in.)
With a different pen:
0.2
mm
(0.008
in.)
SUPPLEMENTAL
CHARACTERISTICS
Maximum
plotting
area
B/A3: 402.2
mm
(15.8
in.)
X
274.8
mm
(10.8
in.) metric
414.2
mm
(16.3
in.)
X 258.0
mm
(10.2
in.) English
A/A4:
274.8
mm
(10.8
in.)
X
192.2
mm
(7.6
in.) metric
258.0
mm
(10.2
in.)
X 198.2
mm
(7.8
in.) English
Pen
velocity
Pen
down: maximum,
38.1
cm/s
(15
in.ls)
programmable, 1 to 38
emfs
in
1
cm/s
increments.
Pen up: 50.8
cm/s
(20
in.ls)
Addressable
step
size
0.025
mm
(0.00098 in.)
Acceleration
Approximately 2g
Power
requirements
Source:
100,
120,
220,
or
240
Vac -10%, +5%
Frequency:
48
to
66
Hz
Consumption:
35
W maximum
Size
Length: 57 cm
(22.5
in.)
Width: 37 cm
(14.5
in.)
Height: 13 cm
(5
in.)
Weight
7.2
kg
(15.8
lb)
1-10. PLOTTERS COVERED
BY
MANUAL
1-11.
The plotter serial number
is
located
on
the
rear
panel. Hewlett-Packard uses a two-part serial
number
consisting
of
a four-digit prefix
and
a five-digit suffix
separated
by
a letter
(OOOOAOOOOO).
The
prefix is
the
same
for all identical plotters
and
changes only when a
modification
is
made
that
affects
parts
compatibility.
The suffix is assigned sequentially
and
is different for
1-1
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