HP 7942 Service Manual page 135

Disc/tape drives
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REPLACEABLE PARTS -
~------------------~~
A6-1., INTRODUCTION
This section
provides listings
of all
field-
replaceable parts and' an illustrated parts break-
down for the disc/tape drive. Replaceable parts
ordering information ;'or the drive is also provided
in this se¢tion.
Note:
Repla4~eable
parts information for
items contained within tape drive
assembly U 1- PRA I
is
not provided
in this section. For this information,
refer to the Tape Drive Service
Manual, Section VI, Replaceable
Parts.
Replaceable parts for the drive are listed in order
of disassembly in table A6-1 and illustrated in
figure A6-1. In each; listing, attaching parts are
listed immediately after the item they attach.
Items in the DESCRIPTION column are indented
to indicate their relationship to the next higher
as-
sembly. In addition, the symbol " __
-X- __ "
follows
the last
a~taching
part: for the item. Identification
of the items and the labels
is
as
follows:
Major Assembly
*Replaceable
~~mbly
* Attaching Part for Replaceable Assembly
**Subassembll
r
or Component Part
** Attaching Part for Subassembly or Replaceable
Part
The replaceable parts listings provide the following
inf orma lion f ()r each part:
a. FIG
&
INDEX NO. The figure and index number
which indicat,es where the replaceable part is il-
lustrated.
b. HP PART NO. The Hewlett-Packard number for
the replaceable part.
c. DESCRIPTION. The description of the replace-
able part.
Refer to table A6- 2 for an explanation of the ab-
breviations
used
in the DESCRIPTION column.
d. MFR CODE. The S-digit code that denotes a
typical manufacturer of a part. Refer to table
A6- 3 for a listing of manufacturers that cor-
respond to the codes.
e. MFR PART NO. The manufacturer's part num-
ber for each replaceable part.
f. UNITS PER ASSEMBLY. The total quantity of
each part used in the major assembly.
g. The MFR CODE and MFR PART NO. for com-
mon hardware
are
listed
u
00000
and OBD (order
by description), respectively, because these items
can usually
be
purchased locally.
Note: TORxt
R
)
* hardware is used in the
drive. This hardware requires the
use
of special drivers. Refer to Sec-
tion IV, Service Information, for
details.
In
this section,
any
reference to this type of hardware
will
be
accompanied
by
the
required driver size (for example,
'TIS").
A6-2. ORDERING INFORMATION
To order replaceable parts for the drive, address
the order to your local Hewlett-Packard Sales and
Support Office. Sales and Support Offices are list-
ed at the back of this manual. Specify the follow-
ing information for each order:
a. Model and full serial number.
b. Hewlett-Packard part number.
c. Complete description of each part as provided in
the replaceable parts listing.
*TORX
is
a
rc~gistered
trademark of the Camcar Division of Textron, Inc.
A6-1

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