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HEWLETT - PACKARD
UP 7957A AND UP 7958A DISC DRIVES
OWNER'S MANUAL
CERTIFICATION
Products, materials, parts, and services furnished on this order
have been provided in accordance with all applicable Hewlett-
Packard specifications. Actual inspection and test data per-
taining to this order is on file and available for examination.
Hewlett-Packard's calibration measurements are traceable to
the National Bureau of Standards to the extent allowed by the
Bureau's calibration facilities.
The Hewlett-Packard Quality Program satisfies the require-
ments of MIL-Q-9B5B, MIL-I-4520B, and MIL-C-45662.
OWNER'S MANUAL
7957 A AND 7958A DISC DRIVES
Manual part number: 07957-90901
Microfiche part no. 07957-90801
Printed: NOVEMBER 1986 Edition 1
Printed in U.S.A. E1186
MODELS COVERED
This manual covers the following models: HP 7957A and
HP 7958A.
OPTIONS COVERED
In addition to the standard model, this manual covers the
following options: 015, 550.
Flio- HEWLETT
a!'aI PACKARD
HEWLETT -PACKARD
P.O. Box 39, Boise, Idaho 83707-0039
Notice
The information contained in this document is subject to change without notice.
HEWLETf-PACKARD MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS
MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. HEWLETT-PACKARD shall
not be liable for errors contained herein or for incidental or consequential damages in connection with the
furnishing, performance or use of this material.
HEWLETT-PACKARD assumes no responsibility for the use or reliability of its software on equipment
that is not furnished by HEWLETT-PACKARD.
This document contains proprietary information, which is protected by copyright. All rights are reserved.
No part of this document may be photocopied, reproduced or translated to another language without the
prior written consent of HEWLETT-PACKARD Company.
Copyright @ 1986 by HEWLETT-PACKARD
FOR U.S.A. ONLY
The Federal Communications Commission has specified that the following notice
be brought to the attention of the users of this product.
FEDERAL COMMUNICATIONS COMMISSION
RADIO FREQUENCY INTERFERENCE
STATEMENT
Warning: This equipment generates and uses radio frequency energy and if not installed and used
properly, that is, in strict accordance with the manufacturer's instructions, may cause interference
to radio and television reception. It has been type tested and found to comply with the limits for a
Class B computing device in accordance with the specifications in Subpart J of Part 15 of FCC
Rules, which are designed to provide reasonable protection against such interference in a residential
installation. However, there is no guarantee that interference will not occur in a particular installa-
tion. If this equipment does cause interference to radio or television reception, which can be deter-
mined by turning the equipment off and on, the user is encouraged to try to correct the inter-
ference by one or more of the following measures: re-orient the receiving antenna; relocate the
computer with respect to the receiver; move the computer away from the receiver; plug the com-
puter into a different branch circuit. If necessary, the user should consult the dealer or authorized
field service representative for additional suggestions. The user may find the following booklet
prepared by the Federal Communications Commission helpful: "How to Identify and Resolve
Radio-TV Interference Problems". This booklet is available from the U.s. Government Printing
Orri~t:, \-\'d~lliue;luu, DC ::040::. Stu(.k No. 004-000-00345-4.
2
Safety Considerations
GENERAL - This product and related documenta- source to the product input wInng terminals,
tion must be reviewed for familiarization with power cord, or supplied power cord set. Whenever
safety markings and instructions before operation. it is likely that the protection has been impaired,
the product must be made inoperative and be
SAFETY SYMBOLS secured against any unintended operation.
Instruction manual symbol: the product BEFORE APPLYING POWER - Verify that the
will be marked with this symbol when it product is configured to match the available main
is necessary for the user to refer to the power source according to the input power con-
instruction manual in order to protect figuration instructions provided in this manual.
the product against damage.
If this product is to be operated with an autotrans-
former make sure that the common terminal is
Indicates hazardous voltages. connected to the earth terminal of the main power
source.
SERVICING
-L..
Indicates earth (ground) terminal.
WARNING
Any servlcmg, adjustment, maintenance, or
I
WARNING repair of this product must be performed only
by service-trained personnel.
The WARNING sign denotes a hazard.
It calls attention to a procedure or prac- Adjustments described in this manual may be
tice that, if not correctly performed or performed with power supplied to the product
adhered to, could result in personal in- while protective covers are removed. Energy
jury. Do not proceed beyond a available at many points may, if contacted,
WARNING sign until the indicated result in personal injury.
conditions are fully understood and met.
Capacitors inside this product may still be
charged after the product has been disconnec-
I CAUTION I ted from the main power source.
The CAUTION sign denotes a hazard. To avoid a fire hazard, fuses with the proper
It calls attention to an operating proce- current rating and of the specified type (nor-
dure or practice that, if not correctly mal blow, time delay, etc.) must be used for
performed or adhered to, could result in replacement. To install or remove a fuse, first
damage to or destruction of part or all disconnect the power cord from the device.
of the product. Do not proceed beyond Then, using a small flat-bladed screw driver,
a CAUTION sign until the indicated turn the fuseholder cap counterclockwise until
conditions are fully understood and met. the cap releases. Install either end of a prop-
erly rated fuse into the cap. Next, insert the
SAFETY EARTH GROUND - This is a safety fuse and fuse holder cap into the fuseholder by
class I product and is provided with a protective pressing the cap inward and then turning it
earthing terminal. An uninterruptible safety earth clock wise until it locks in place.
ground must be provided from the main power
3
Printing History
New editions are complete revisions of the manual. Update packages, which are issued between editions,
contain additional and replacement pages to be merged into the manual by the customer. The dates on the
title page change only when a new edition or a new update is published. No information is incorporated
into a reprinting unless it appears as a prior update; the edition does not change when an update is
incorpora ted.
A software code may be printed before the date; this indicates the version level of the software product at
the time the manual or update was issued. Many product updates and fixes do not require manual changes
and, conversely, manual corrections may be done without accompanying product changes. Therefore. do
not expect a one-to-one correspondence between product updates and manual updates.
Edition I .................................................. NOVEMBER 1986
Herstellerbescheinigung
Hiermit wird bescheinigt. daO das Gerat/System HP 7957 A/HP 7958A in
Obereinstimmung mit den Bestimmungen von Postverfiigung 1046/84
funkentstort ist.
Der Deutschen Bundespost wurde das Inverkehrbringen dieses
Gerates/Systems angezeigt und die Berechtigung zur Oberpriifung der Serie
auf Einhaltung der Bestimmungen eingeraumt.
Manufacturer's Declaration
This is to certify that the product(s) HP 7957 A/HP 7958A is in accordance
with the Radio Interference Requirements of Directive FTZ 1046/1984. The
German Bundespost was notified that this equipment was put into circula-
tion; the right to check the series for compliance with the requirements was
granted.
Additional Information for Test and Measurement Equipment
If Test and Measurement Equipment is operated with unscreened cables
and/or used for measurements on open setups, the user has to assure that
under operating conditions the Radio Interference Limits are still met at the
border of his premises.
4
Contents
Chapter 1 Page
General Description 1-1
Introduction ............................................... , ................................................. 1-1
Accessories ................................................................................................... 1-1
Options ...................................................................................................... 1-2
Characteristics ............................................................................................... 1-2
Supporting Documentation .................................................................................. 1-2
Chapter 2 Page
lnstalla tion 2-1
Introduction ................................................................................................. 2-1
Unpacking Your Disc Drive ................................................................................. 2-1
Handling ..................................................................................................... 2-3
Design Plus Cabinet Installation ............................................................................. 2-3
Equipment Supplied ......................................................................................... 2-3
Power Requirements ......................................................................................... 2-4
Configuring Power .......................................................................................... 2-4
Setting the VOLTAGE SELECTOR Switch .............................................................. 2-5
FUSE Value .............................................................................................. 2-5
Warranty Label .............................................................................................. 2-5
Installing The Power Cord ................................................................................... 2-6
Connecting The Disc Drive To Your System ................................................................ 2-6
Checking the HP-IB Cable ................................................................................ 2-7
Setting the HP-IB Device Address ........................................................................ 2-7
Chapter 3 Page
Operation 3-1
Introduction ................................................................................................. 3-1
Warnings And Precautions .................................................................................. 3-1
Environmental Limits ........................................................................................ 3-1
Controls And Connectors .................................................................................... 3-1
LINE- Switch ............................................................................................ 3-2
-AC LINE Connector .................................................................................... 3-2
FUSE ..................................................................................................... 3-2
VOLTAGE SELECTOR Switch .......................................................................... 3-2
HP-IB Connector ......................................................................................... 3-3
ADDRESS Switch ........................................................................................ 3-3
FAULT/ON LINE Indicator ............................................................................. 3-3
5
Contents (continued)
Line Voltage Application .................................................................................... 3-3
Line Voltage Removal ....................................................................................... 3-4
Chapter 4 Page
Maintenance And Service 4-1
Serial Number ............................................................................................... 4-1
Shipping...................................................................................................... 4-1
Disc Drive Maintenance ..................................................................................... 4-1
Warranty .................................................................................................... 4-1
6
Figures and Tables
Figure or Table Page
Table 1-1. Disc Drive Characteristics ....................................................................... 1-3
Figure 2-1. Packaging Details ............................................................................... 2-2
Figure 2-2. Controls and Connectors ........................................................................ 2-4
Figure 2-3. Maximum HP-IB Cable Length ................................................................. 2-9
Figure 3-1. Controls and Connectors ........................................................................ 3-2
Figure 3-2. Self-Test Display ................................................................................ 3-4
7
General Description 1
Introduction
The Hewlett-Packard 7957 A and 7958A Disc Drives are random access, data
storage devices designed for use with small and medium sized computer systems.
The formatted storage capacities of the HP 7957A and 7958A are 81 megabytes
and 130 megabytes respectively. In this manual, unless otherwise specified, "disc
drive" refers to both the HP 7957 A and the HP 7958A.
The disc drive employs three (HP 7957 A) or five (HP 7958A) nonremovable
130-millimetre (5.l2-inch) discs for storage media. Each disc surface employs one
movable head to service its data tracks. The bottom surface of the lowest disc
contains continuous prerecorded servo data which is used to ensure the precise
positioning of the read/write heads.
Head positioning is performed by a rotary voice-coil actuator and a closed-loop
servo positioning system. Contamination protection for the heads, actuator, and
media is achieved by enclosing these components in a sealed head-disc assembly
having a built-in air filter.
Also included in the disc drive are a Hewlett-Packard Interface Bus (HP-IB)*
controller and a dc power supply.
The disc drive contains internal self-test diagnostics and a fault-finding system
which exercise key functions of the disc drive. Self test is performed
automatically at power on and can also be initiated by the host computer.
Go/no-go test results are indicated by a green/red indicator on the front panel.
The disc drive is packaged in a stand-alone desktop cabinet. Accessories available
include a desk-height stand-alone cabinet designed to hold the disc drive and
other desktop stack modules. A kit for rack mounting the disc drive in a
standard EIA equipment rack is also available.
This manual provides the information needed to install and operate the disc
drive. Details of the control functions provided by the host computer are
described in the computer's documentation.
Accessories
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