HP Model 712/100 - Workstation User manual

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Service Handbook
Model 712 Workstations
HP Part Number. A2615–90039
Hewlett–Packard Company
3404 East Harmony Road, Fort Collins, CO. 80525
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The information contained in this document is subject to change without notice.
HEWLETT–PACKARD MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MANUAL, IN-
CLUDING, 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 direct,
indirect, special, incidental, or consequential damages in connection with the furnishing, performance, or
use of this material.
A copy of the specific warranty terms applicable to your Hewlett–Packard product and replacement parts
can be obtained from your local Sales and Service Office.

CopyrightEHewlett–Packard Company 1995
This document contains information which is protected by copyright. All rights are reserved. Reproduction, adapta-
tion, or translation without prior written permission is prohibited, except as allowed under the copyright laws.
Restricted Right Legend
Use, duplication, or disclosure by the U.S. Government Department of Defense is subject to restrictions as set forth
in paragraph (b)(3)(ii) of the Rights in Technical Data and Software clause in FAR 52.227–7013.
CopyrightEAT & T, Inc. 1980, 1984
CopyrightEThe Regents of the University of California 1979, 1980, 1983
This software and documentation is based in part on the Fourth Berkeley Software Distribution under licence from
the Regents of the University of California.

iii
Printing History
New Editions of this manual incorporate all material updated since the previous edi-
tion. Update packages may be issued between editions and contain replacement and
additional pages to be merged into the manual by the user.
The manual printing date and part number indicate its current edition. The printing
date changes when a new edition is printed. (Minor corrections and updates which
are incorporated at reprint do not cause the date to change.) The manual part number
changes when extensive technical changes are incorporated.
September 1993 Edition 1
December 1993 Edition 2
June 1995 Edition 3

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Emissions Regulations
Federal Communications Commission (FCC)
The Federal Communications Commission of the U.S. government regulates the ra-
dio frequency energy emanated by computing devices through published regulations.
These regulations specify the limits of radio frequency emission to protect radio and
television reception. All HP Apollo nodes and peripherals have been tested and com-
ply with these limits. The FCC regulations also require that computing devices used
in the U.S. display the agency’s label and that the related documentation include the
following statement:
NOTICE: This equipment has been tested and found to comply
with the limits for a Class A digital device, pursuant
to part 15 of the FCC rules. These limits are designed
to provide reasonable protection against harmful in-
terference when the equipment is operated in a com-
mercial environment. This equipment generates, uses,
and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction
manual, may cause harmful interference to radio
communications. Operation of this equipment in a
residential area is likely to cause harmful interference
in which case the user will be required to correct the
interference at his own expense.
Compliance to these regulations requires the use of shielded cables.
Canadian Department of Communications (DOC)
This digital apparatus does not exceed the Class A limits for radio noise emissions
from digital apparatus as set out in the Radio Interference Requirements of the Cana-
dian Department of Communications.
Compliance to these regulations requires the use of shielded cables.

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VCCI Class 1 ITE
Emissions Regulations Compliance
Any third–party I/O device installed in HP Apollo system(s) must be in accordance
with the requirements set forth in the preceding Emissions Regulations statements. In
the event that a third–party noncompliant I/O device is installed, the customer as-
sumes all responsibility and liability arising therefrom.
Compliance to these regulations requires the use of shielded cables.
Electrostatic Discharge (ESD) Precautions
Electrostatic charges can damage the integrated circuits on printed circuit boards. To
prevent such damage from occurring, observe the following precautions when un-
packing and installing the board.
DStand on a static–free mat.
DWear a static strap to ensure that any accumulated electrostatic charge dis-
charges from your body to ground.
DConnect all equipment together, including the static–free mat, static straps,
routing nodes, and peripheral units.
DKeep uninstalled printed circuit boards in their protective antistatic bags.
DOnce you have removed the printed circuit boards from their protective antis-
tatic bags, handle them by their edges.

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Laser Safety Statement (For U.S.A. Only)
(For workstations that have a CD–ROM drive installed.)
The CD–ROM mass–storage system is certified as a Class–1 laser product under the
U.S. Department of Health and Human services (DHHS) Radiation Performance
Standard according to the Radiation Control for Health and Safety Act of 1968.
This means that the mass–storage system does not produce hazardous laser radiation.
Because laser light emitted inside the mass–storage system is completely confined
within protective housings and external covers, the laser beam cannot escape from
the machine during any phase of user operation.
LASERTURVALLISUUS
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
HP A2655A CD–ROM–lukulaite sisältää laitteensisäisen CD–ROM–yksikön, joka
on laserlaite.
Kyseinen CD–ROM–yksikkö on käyttäjän kannalta turvallinen luokan 1 laserlaite.
Normaalissa käytössä yksikön suojakotelo estää lasersäteen pääsyn laitteen ulkopuo-
lelle.
CD–ROM–yksikön on tyyppihyväksynyt Suomessa laserturvallisuuden osalta
Työministeriön työsuojeluosasto. Laitteeen turvallisuusluokka on määritetty valtio-
neuvoston päätöksen N:o 472/1985 ja standardin SFS–EN 60825 (1992) mukaisesti.
Tiedot CD–ROM–yksikössä käytettävän laserdiodin säteilyominaisuuksista:
Aallonpituus 790 nm
Teho 1,1 µW
Luokan 1 laser

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IEC 825 Class 1 Laser Labels
CLASS 1 LASER PRODUCT
LASER KLASSE 1

viii
Warnings and Cautions
WARNING:
Removing device cover may expose sharp edges in equipment chassis. To avoid injury,
use care when installing customer add–on devices.
WARNUNG:
Das Entfernen der Geräteabdeckung legt die scharfen Kanten im Inneren des Gerätes
frei. Um Verietzungen zu vermeiden, seien Sie vorsichtig beim Einbau von zusätzlichen
Bauteilen, die vom Kunden selber eingebaut werden können.
AVERTISSEMENT:
Des bords tranchants du châssis de l’équipement peuvent être exposés quand le cache de
l’unité n’est pas en place. Pour éviter des blessures, faire très attention lors de
l’installation de modules supplémentaires par le client.
WARNING:
Disconnect power plug from wall outlet or source power before moving or removing the
device, or installing add–on components.
WARNUNG:
Entfernen Sie die Stromzuführung von der Steckdose oder der Stromquelle bevor Sie das
Gerät bewegen, abbauen, oder zusätzliche Bauteile installieren.
AVERTISSEMENT:
Débrancher la fiche de la prise de courant ou de la source d’alimentation électrique avant
de déplacer ou de retirer l’unité, ou avant d’installer des modules supplémentaires.

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Warnings and Cautions (Cont.)
CAUTION:
System power cord must be plugged into an accessible dedicated ac mains receptacle.
VORSICHT:
Das System–Netzanschlußkabel mußan eine zugängliche spezielle Wechselstrom–
Hauptzuführungssteckdose angeschlossen werden.
ATTENTION:
Le fil d’alimentation électrique du système doit être branché dans une prise de courant
c.a. spécialisée accessible.
WARNING:
Use only power supply Model ETYHP127MM with A2656A Tape Drive.
AVERTISSEMENT:
Utiliser seulement le bloc d’alimentation ETHYP127MM pour le dérouleur de bande
A2656A.
WARNING:
Use only power supply Model ETYHP127MM with A2657A Hard Disk Drive.
AVERTISSEMENT:
Utiliser seulement le bloc d’alimentation ETHYP127MM pour le disque dur A2657A.
WARNING:
Use only power supply Model ETYHP127MM with A2655A CD–ROM Drive.
AVERTISSEMENT:
Utiliser seulement le bloc d’alimentation ETHYP127MM pour le lecteur de CD–ROM
A2655A.