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HP 7475a Service Manual

HP 7475a
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Model 7475A
Section V
ITEM3
Date code
2420-11
introduced a design
change
that
eliminated inductive voltage spikes
in
the
motor drivers when the
plotter
was
switched off.
The
part
numbers
that
differ from those listed
in
Section IV;
and
the
effect
of
these component
differences
on
the
schematic diagram
and
parts
location figure
in
Section VI,
are
as
follows:
REFERENCE
DESIGNATOR
AlDSl-2
A1DS3
A1E4
A1E8
AlEll-16
A1E18-20
A1H3-6
A1H9-12
A1J4
A1U28
+svl
7475-8-37-2
MAIN PCA,
RS-232-C,
OPTION
001
PART
NUMBER
DESCRIPTION
1990-0485
LED
1990-0487
LED
1200-0567
SOCKET
1200-0654
SOCKET
2110-0597
FUSEHOLDER
07470-40038
SPACER
0515-0055
SCREW
0535-0031
NUT
1251-4946
CONNECTOR
07475-60103
DIODEAY
~
I
1+18/26V
"'"
PEN
COIL
SUPPLY
DS2
1'
>--'..;;_
___
__,.,.,.~-1--1.....i-~v
•PART
OF
U28
DIODE
ASSEMBLY
07475-60103
Ri3
3.
16K
R2
IK
PAPER
SIZE
(gj
OSI
1t
>--''-'--~,,.,..__-~I-+--
+5V
I
I
----
:A:ER
SIZE
[ill'
CHECK
DIGIT
CAROUSEL
DRIVE
STEPPER
MOTOR
5
7
1
7
7
6
8
2
5
3
Partial
View ofRS-232-C Main
PCA
Option
001
Schematic Diagram (Date Code
2420-11)
7475-A-2&-2
Partial
View ofRS-232-C Main
PCA
Option
001
Parts
Location Diagram (Date Code
2420-11)
5-3

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HP 7475a Specifications

General IconGeneral
BrandHP
Model7475a
CategoryPlotter
LanguageEnglish

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