Black Box ACU5050A User manual

ServSwitch Wizard USB Extender
®
NETWORK SERVICES
®
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX
FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax [phone]
Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com • E-mail: [email protected]
CUSTOMER
SUPPORT
INFORMA-
January 2005
ACU5050A

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®
SECT 1
Contents
Welcome
Introduction ................................................................................2
Supplied items .............................................................................3
Installation
Mounting a module – desk or rack ............................................4
Connections .................................................................................5
Connections at the LOCAL module........................................5
Installation Advice ..................................................................5
Video...................................................................................5
USB .....................................................................................6
Audio ..................................................................................6
Link connection(s) ..............................................................7
Optional power supply ......................................................7
Connections at the REMOTE module ....................................8
Video monitor ....................................................................8
USB devices .........................................................................8
Audio connections .............................................................9
Link connection(s) ..............................................................9
Power supply ....................................................................10
Operation
General use ................................................................................11
Power surge fuses......................................................................11
Power and activity indicators....................................................11
Signal loss compensation ..........................................................12
Video signal boost ................................................................12
Multi frequency video boost ...........................................12
High frequency video boost ............................................12
Microphone signal boost......................................................13
Further information
Troubleshooting ........................................................................14
Getting assistance......................................................................14
Radio Frequency Energy ...........................................................16
Certication notice for equipment used in Canada................17
Normas Ociales Mexicanas (NOM) electrical safety ..............18
Instrucciones de seguridad ..............................................18

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®
SECT 2
Welcome
Introduction
Thank you for choosing the Wizard USB
Extender set. These compact modules allow
you to extend the distance between any
system and its peripherals by up to 100 metres.
In addition to transferring video signals, the
extender units provide four USB ports and
microphone input as well as stereo speaker
output.
In a straightforward setup procedure, one
module connects to the system while the other
is situated next to the user and attaches to the
various peripherals. The two modules are then
linked by one or two standard CAT-5 twisted
pair cables: one to carry video and USB data,
the other to (optionally) transfer microphone
and speaker signals.
PSU
PSU
PC
VIDEO
SPK
MIC
USB
USB 1
USB 2
USB 3
USB 4
REMOTE
BLACK BOX
Wizard
USB
Extender
®
724-746-5500
®
LOCAL
BLACK BOX
Wizard
USB
Extender
®
724-746-5500
®
Video, USB, speaker
and microphone
connections from
host PC
Optional power supply
unit (not needed when
USB connection to PC
used)
CAT-5 cabling up to 100 metres:
First cable for video & USB data
Second cable for microphone and
speaker signals
Video monitor
port, four USB
ports, plus
microphone
and speaker
ports.

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Supplied items
USB
LOCAL
TO REMOTE
POWER
ON
HOST
LINK
AUDIO
VIDEO
BLACK BOX
Wizard
Extender
®
724-746-5500
®
REMOTE
TO LOCAL
POWER
ON
COMPENSATION
LINK
AUDIO
VIDEO
BLACK BOX
Wizard
USB
Extender
®
724-746-5500
®
LOCAL extender module
REMOTE extender module
Connection to
PC video output
Connection to
PC USB port
Connection to PC
microphone and
speaker ports
Connection to
video monitor
Four USB (v1.1)
ports
Connections for
microphone and
speakers
Option switches
Power supply
connection
Video
compensation
adjustment
Operation
indicators
Connections to
LOCAL module
Optional power
supply connection
Operation
indicators
Connections
to REMOTE
module
Video cable
Power supply
plus mains cable
USB cable
Audio cable
Self adhesive
rubber feet
Two rack securing
plates and four
screws

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Installation
The installation of the Wizard USB Extender set is straightforward and can best
be achieved in most cases by following these stages for each module:
• Mount the module
• Connect the cables
Mounting a module – desk or rack
The Wizard USB Extender modules can be
situated on a desk (or oor) or alternatively, for
larger installations, mounted within optional
rack mount chassis units.
Desk mount
Apply the supplied self-adhesive rubber feet to
the underside of the module(s).
Rack mount
Note: The module switches are not accessible once it is inserted into the rack,
therefore, check all settings before insertion.
1 Place the supplied rack securing plate onto the front of the module and secure
it with the two countersunk screws.
2 Orient the module on its side so that its labelled face is the correct way up and
the securing plate is facing away from the rack.
3 Slide the module into the required rack position. The rectangular cut-out in the
front upper lip of the rack allows the two screws on the module’s upper edge to
slide through.
4 The rack mount chassis has a series of holes in its oor that are spaced to
accommodate the two screws on the module’s lower edge. Ensure that the
screws correctly locate into the two holes of the chosen slot. The rack securing
plate on the module should now be ush with the front of the rack mount
chassis.
5 Use the third (pan-head) screw, in the top hole of the rack securing plate to
fasten the module to the rack.
1
ON
4
23
SECT 3

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®
Connections
The naming of the LOCAL and REMOTE modules relate to their proximity to the
computer system.
PC User
REMOTE
BLACKBOX
Wizard
USB
Extender
®
724-746-5500
®
LOCAL
BLACK BOX
Wizard
USB
Extender
®
724-746-5500
®
Hence, the LOCAL module connects directly to the system, while the REMOTE is
at the other end of the twisted pair cable(s) and attaches to the video monitor,
USB peripherals and sound equipment.
Connections at the LOCAL module
When using the full capabilities of the Wizard USB Extender modules, the
following connections are made to the LOCAL module:
• Video - see right
• USB
• Audio
• Twisted pair link(s)
• Optional power supply
Cables can be attached in any order, not necessarily the order shown in this
section.
Note: Wherever possible, ensure that the PC system is switched off when
connecting cables.
LOCAL Module
connects to the PC
REMOTE Module
connects to the
peripherals by the user
2 Attach the other end of the video cable to the video output port of the host
PC.
Video
1 Locate the supplied video cable and attach one end to the connector
marked on the LOCAL module.
Installation Advice
• For correct operation, the local and remote units must have ground
connections. At the computer end, this is achieved by ensuring that the
computer or KVM switch that the Wizard module is connected to has a
ground connection. At the keyboard / monitor / mouse end, this can be
achieved by ensuring that the Wizard module’s power supply is connected to
a grounded power outlet. Alternatively, a ground connection will be made
via the monitor, if the monitor is itself grounded.
• Try to avoid laying the interconnect cable alongside power cables where
possible.

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®
USB
1 Locate the supplied USB cable and insert the smaller connector into the
LOCAL module socket marked .
2 Attach the other end of the USB cable to one of the USB sockets of the host
PC.
Note: When connected to a USB port of the PC, the LOCAL module does
not require the use of a power supply unit (the REMOTE module, however,
always requires a power supply).
Audio
1 Locate the supplied audio cable and attach one end to the required jack
socket marked (speaker) or (microphone) on the LOCAL module
(if you need to simultaneously use the speaker and microphone connections,
a second audio link cable will be needed).
2 Insert the plug at the other end of the audio cable to appropriate socket on
the PC system:
• Microphone sockets are often coloured pink
• Speaker sockets are often coloured light green.
Note: If the module is rack
mounted, the audio connection
must be made after the module
has been xed in place. Access
is required to the rear and above
the rack. Remember to remove
the audio connection before
attempting to slide out the module.
1
ON
4
23
Audio connection
must be made
after mounting and
removed before
attempting to slide
the module out

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Link connection(s)
Links between the LOCAL and REMOTE modules are made via one (or two)
twisted pair cables, specied to Category 5 or higher. Ensure that the total
twisted pair cable length for each connection (including patch boxes) does not
exceed 100 metres.
• When extending only video and USB, only a single link cable is required.
• When extending video, USB and audio signals, two link cables are required.
Audio link cable
Required only when using
microphone and/or speakers.
1 Insert the connector from
the secondary twisted pair
cable link into the LOCAL
module socket marked
‘AUDIO’.
Video and USB link cable
1 Insert the connector from the
primary twisted pair cable link
into the LOCAL module socket
marked ‘USB + VIDEO’.
Optional power supply
A power supply is only required by the LOCAL module when no USB connection
is made to the USB port of the PC.
1 Attach the output connector of the power supply to the LOCAL module
socket marked ‘POWER’.
2 Insert the IEC connector of the supplied power lead into the corresponding
socket of the power supply. Connect the other end of the power lead to a
nearby mains socket.

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Connections at the REMOTE module
When using the full capabilities of the Wizard USB Extender modules, the
following connections are made to the REMOTE module:
• Video monitor - see below
• USB devices - see below
• Audio (microphone and speakers)
• Link connection(s)
• Power supply
Cables can be attached in any order, not necessarily the order shown in this
section.
Video monitor
1 Attach the lead from the monitor to the REMOTE module socket marked .
USB devices
The REMOTE module contains a USB hub that provides four separate USB 1.1
channels.
1 Attach the leads from up to four USB devices to the REMOTE module
sockets marked .

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Audio connections
Audio connections are available at the two 3.5” jack sockets mounted on the
side (same side as the switch bank) of the REMOTE module.
1 Make the required audio connections according to the corresponding
connection(s) at the LOCAL module.
• Microphone connections are made to the REMOTE module socket
marked
• Speaker connections are made to the REMOTE module socket
marked
Note: The REMOTE module provides a signal boost feature to assist with
unresponsive microphones. See Microphone signal boost for details.
Link connection(s)
Links between the REMOTE and LOCAL modules are made via one (or two)
twisted pair cables, specied to Category 5 or higher. Ensure that the total
twisted pair cable length for each connection (including patch boxes) does not
exceed 100 metres.
• When extending only video and USB, only a single link cable is required.
• When extending video, USB and audio signals, two link cables are required.
Video and USB link cable
1 Insert the connector from the
primary twisted pair cable link
into the REMOTE module socket
marked ‘USB + VIDEO’.
Audio link cable
Required only when using microphone
and/or speakers.
1 Insert the connector from the
secondary twisted pair cable
link into the REMOTE module
socket marked ‘AUDIO’.
Note: If the module is rack
mounted, the audio connection
must be made after the module
has been xed in place. Access
is required to the rear and above
the rack. Remember to remove
the audio connection before
attempting to slide out the module.
1
ON
4
23
Audio connection
must be made
after mounting and
removed before
attempting to slide
the module out

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®
Power supply
A power supply is always required by the REMOTE module.
1 Attach the output connector of the power supply to the REMOTE module
socket marked ‘POWER’.
2 Insert the IEC connector of the supplied power lead into the corresponding
socket of the power supply. Connect the other end of the power lead to a
nearby mains socket.

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Operation
General use
In use, the Wizard USB Extender modules should be transparent - the system
and its peripherals should operate exactly as normal, the only difference being
that they are now up to 100 metres apart.
In some installations, you may see some ‘shadows’ to the right of high contrast
screen characters. This can be caused by signal loss over long distances (or low
quality link cables) or by incorrect video signal compensation settings - see the
Signal loss compensation section for details.
Power surge fuses
Both modules contain internal automatic cut-out fuses to protect against power
surges.
If a module stops responding
• Check whether the module’s ON indicator is lit. If the ON indicator is lit, then
the problem is unlikely to be power related, check all the connections.
• If the module ON indicator is not lit, check the indicator on its power supply,
or for the LOCAL module, check that the PC is operating and the USB link is
still connected.
• If the power supply indicator is lit, or the PC is operating (with the USB link
intact), then the anti-surge surge fuse may have been tripped. Reset the
anti-surge fuse, as detailed next.
To reset an anti-surge fuse
Remove the power connection (or, for an unpowered LOCAL module, the USB
connection) from the module for one second and then reconnect.
TO REMOTE
POWER
ON
HOST
LINK
AUDIO
VIDEO
ON
Lit whenever power (from the PC USB
port or optional power supply) is present.
HOST
Lit whenever a USB host (PC) is connected
and at least one device is attached at the
REMOTE module. This indicator will icker
when an active PC host is connected,
but will darken if there is no remote USB
device.
LINK
Lit when a physical link exists between the
LOCAL and REMOTE modules.
TO LOCAL
POWER
ON
COMPENSATION
LINK
AUDIO
VIDEO
ON
Lit whenever power from the power
supply is present.
LINK
Lit whenever a USB host (PC) is connected
at the LOCAL module and at least one
device is attached at the REMOTE module.
This indicator will icker when an active
PC host is connected, but will darken if
there is no USB device connected at the
REMOTE module.
Power and activity indicators
The front panels of both modules feature recessed indicators to provide
conrmation of power and activity.
LOCAL module
REMOTE module
SECT 4

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High frequency video boost
This feature provides an extra boost for high frequency video signals which are
most greatly affected by cable losses. Before using this feature, ensure that the
multi frequency boost has been set for the approximate cable length.
To adjust high frequency video boost
1 Display a high contrast image with vertical edges on the remote monitor:
• Open a word processor, type the capital
letter ‘H’, or ‘M’ and increase the point
size to 72 or higher. For best results, the
background should be white and the
character should be black.
2 Insert a small at-bladed screwdriver into the
slot of the small recessed dial on the REMOTE
module, marked ‘COMPENSATION’.
3 Slowly turn the dial while viewing the screen
image, until the vertical edges of the test
pattern are crisp and clear with no shadowing:
• A BLACK shadow to the
right of the character
indicates UNDER
compensation - turn the
dial clockwise to increase
boost.
• A WHITE shadow
to the right of the
character indicates
OVER compensation
- turn anti-clockwise to
decrease boost.
Note: If you apply too much
boost, the monitor may go
blank. Turn the dial anti-
clockwise until the image
returns.
Signal loss compensation
Analog signals such as video and audio are susceptible to the effects of cable
resistance. When transmitted over long distances the degradations can begin to
produce noticeable results. To maintain a high quality service, the Wizard USB
Extender modules feature both video and microphone signal loss compensation
features.
Video signal boost
Two separate boost features are available to ensure that the video signal remains
as crisp and clear as possible:
• Multi frequency video boost - this feature boosts all video frequencies to
counter the general effects of long cable runs. This boost feature is adjusted
using the small switches along the side of the REMOTE module.
• High frequency video boost - this feature affects only the higher video
frequencies that face additional degradation over long spans. This boost
feature is adjusted using the recessed dial at the front end of the REMOTE
module.
Note: If the video image remains fuzzy or distorted after applying both types
of boost, then there may be a ‘skew’ problem. This is caused by uneven
lengths within the twisted pairs of the link cables. To rectify such a problem
you may need to install an Wizard Skew Compensator (part number: ACU-
5100A).
Multi frequency video boost
The function of the multi frequency boost is rather like that of a monitor’s
contrast control. It should be set to according to the preference of the user, but
these REMOTE module switch settings offers a rough guideline:
Link cable length Switch 2 Switch 3
0 - 25 metres OFF OFF
25 - 50 metres OFF ON
50 - 75 metres ON OFF
75 - 100 metres ON ON
1
ON
4
23
1
ON
23
ON
4
TO LOCAL
POWER
ON
COMPENSATION
LINK
AUDIO
VIDEO
Turn
clockwise
to
increase
boost
Turn anti-
clockwise
to
decrease
boost
High contrast
black character
on white
background
White or black
shadow on
right side
- indicates
the need for
adjustment

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®
Microphone signal boost
Most microphones function perfectly well with the standard amplication
provided by the Wizard USB Extenders, however, less responsive microphones
may require an extra boost. This feature boosts the microphone signal by
roughly ten times.
Microphone signal boost Switch 1
Disabled OFF
Enabled ON
1
ON
4
23
1
ON
ON
4
Note: Switch 4 is reserved for future use and currently has no function. It should
remain switched OFF.

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®
Further information
Troubleshooting
If you experience problems when installing or using the Wizard USB Extender
modules, please check through this section for a possible solution. If your
problem is not listed here and you cannot resolve the issue, then please refer to
the ‘Getting assistance’ section.
Video image at the REMOTE module is distorted or shadows appear to
the right of displayed objects.
Video compensation is required to adjust for the length of the link cable being
used. If video problems persist:
• Please refer to the Video signal boost section.
• If the overall video image is ‘fuzzy’ and/or has coloured shadows you
may need to use the optional Wizard Skew Compensator (part number:
ACU5100A). This standalone passive module allows you to nely tune the
red, green and blue video signal timings (each of which is fed along separate
twisted pairs) to overcome most colour separation problems.
No video image is received at the REMOTE module.
• Check that the power/activity indicators are lit on the LOCAL and REMOTE
modules - if they are not, then there is a power problem.
• If the REMOTE module is severely over compensated, the monitor may not
be able to display a picture. Try using a small at-bladed screwdriver to turn
the recessed dial anti-clockwise to reduce the video compensation. See the
Video signal boost section for details.
• Check that the USB + VIDEO link cable (Category 5 or higher) is wired
correctly. See the Connections section for details.
• If possible, try using an alternative USB + VIDEO link cable between the
modules.
• Temporarily disconnect the video link to the LOCAL module, connect a
monitor directly to the computer video port and check for a correct video
image output.
Sound from the microphone cannot be heard or is very quiet
• Try changing the setting of REMOTE module switch 1 to ON.
USB devices work intermittently or not at all
• Check that the link cables do not exceed 100 metres in length (including
patch boxes). Longer cable runs will induce errors that disturb USB
operation.
• If possible, try a different link cable to see whether operation returns to
normal.
• Minimise close contact of the link cables with other cables or devices
carrying high voltages. Such sources can induce interference into the link
cable.
Power is applied via the power supply but REMOTE module operation
has stopped.
• Each module has an internal automatic cut-out fuse to protect against
power surges. To reset, remove power from the module for one second and
then reconnect. To reset an unpowered LOCAL module, remove and then
replace the USB connection. See the Power surge fuses section for details.
Getting assistance
IIf you are still experiencing problems after checking the list of solutions in the
Troubleshooting section then please refer to the customer support information
supplied on the front cover.
SECT 5

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®
Other products in the Wizard range
The following related Wizard items are available:
• Wizard Extender ACU5012A
Consists of two modules, local and remote, that allow you to place the
controlling keyboard, video monitor, mouse, audio accessories (and also a
serial device) up to 650ft (200m) from a system via Category 5, or higher,
twisted pair cabling.
• Wizard Extender ACU5013A
Allows one system to be controlled from two locations or permits a second
video channel to be sent to a remote location. Used in conjunction with two
standard receiver/remote modules.
• Wizard Skew compensator ACU5100A
Removes color split in video signals caused by certain Cat 5e and 6 cables.
Required only in certain installations with long cable lengths and high video
resolutions.
• Rack mount chassis ACU5000A
This 19” chassis allows multiple Wizard modules to be neatly arranged
within a standard cabinet. Securing plates and screws are supplied separately
for each Wizard module for use with the rack mount chassis.
• Power distribution module PS5000
Provides power for up to four Wizard modules to reduce mains power
socket requirements.
• Rack mount securing plates
• single slot blanking plate ACU5003
• quad slot blanking plate ACU5004
Safety information
• For use in dry, oil free indoor environments only.
• Do not use to link between buildings.
• Ensure that the twisted pair interconnect cable is installed in compliance
with all applicable wiring regulations.
• Do not connect the CATx link interface (RJ45 style connector) to any other
equipment, particularly network or telecommunications equipment.
• Warning – the power adapter contains live parts.
• No user serviceable parts are contained within the power adapter - do not
dismantle.
• Plug the power adapter into a socket outlet close to the Wizard unit that it is
powering.
• Replace the power adapter with a manufacturer approved type only.
• Do not use the power adapter if the power adapter case becomes damaged,
cracked or broken or if you suspect that it is not operating properly.
• If you use a power extension cord with the Wizard, make sure the total
ampere rating of the devices plugged into the extension cord do not exceed
the cord’s ampere rating. Also, make sure that the total ampere rating of all
the devices plugged into the wall outlet does not exceed the wall outlet’s
ampere rating.
• Do not attempt to service the Wizard units yourself.
• The Wizard units and power supplies can get warm in operation – do not
situate them in an enclosed space without any ventilation.
• The Wizard units do not provide ground isolation and should not be used
for any applications that require ground isolation or galvanic isolation.

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®
Radio Frequency Energy
A Category 5 (or better) twisted pair cable must be used to connect the Wizard
units in order to maintain compliance with radio frequency energy emission
regulations and ensure a suitably high level of immunity to electromagnetic
disturbances.
All other interface cables used with this equipment must be shielded in order
to maintain compliance with radio frequency energy emission regulations and
ensure a suitably high level of immunity to electromagnetic disturbances.
European EMC directive 89/336/EEC
This equipment has been tested and found to comply with the limits for a class
A computing device in accordance with the specications in the European
standard EN55022. These limits are designed to provide reasonable protection
against harmful interference. This equipment generates, uses and can radiate
radio frequency energy and if not installed and used in accordance with the
instructions may cause harmful interference to radio or television reception.
However, there is no guarantee that harmful interference will not occur in a
particular installation. If this equipment does cause interference to radio or
television reception, which can be determined by turning the equipment on
and off, the user is encouraged to correct the interference with one or more
of the following measures: (a) Reorient or relocate the receiving antenna. (b)
Increase the separation between the equipment and the receiver. (c) Connect
the equipment to an outlet on a circuit different from that to which the receiver
is connected. (d) Consult the supplier or an experienced radio/TV technician for
help.
Federal Communications Comission and Canadian
Department of Communications radio frequency interference
statements
This equipment generates, uses, and can radiate 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 communication. It
has been tested and found to comply with the limits for a Class A computing
device in accordance with the specications in Subpart B of Part 15 of FCC rules,
which are designed to provide reasonable protection against such interference
when the equipment is operated in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference, in which case
the user at his own expense will be required to take whatever measures may be
necessary to correct the interference.
Changes or modications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise emission
from digital apparatus set out in the Radio Interference Regulation of the
Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant
les limites applicables aux appareils numériques de la classe A prescrites dans
le Règlement sur le brouillage radioélectrique publié par le ministère des
Communications du Canada.

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®
Certication notice for equipment used in
Canada
The Canadian Department of Communications label identies certied
equipment. This certication means that the equipment meets certain
telecommunications-network protective, operation, and safety requirements.
The Department does not guarantee the equipment will operate to the user’s
satisfaction.
Before installing this equipment, users should ensure that it is permissible to be
connected to the facilities of the local telecommunications company.
The equipment must also be installed using an acceptable method of
connection. In some cases, the company’s inside wiring associated with a
single-line individual service may be extended by means of a certied connector
assembly (extension cord). The customer should be aware that compliance with
the above conditions may not prevent degradation of service in some situations.
Repairs to certied equipment should be made by an authorized Canadian
maintenance facility—in this case, your supplier. Any repairs or alterations
made by the user to this equipment, or equipment malfunctions, may give
the telecommunications company cause to request the user to disconnect the
equipment.
Users should ensure for their own protection that the electrical ground
connections of the power utility, telephone lines, and internal metallic water
pipe system, if present, are connected together. This precaution may be
particularly important in rural areas.
CAUTION:
Users should not attempt to make such connections themselves, but should
contact the appropriate electric inspection authority, or electrician, as
appropriate.
The LOAD NUMBER (LN) assigned to each terminal device denotes the
percentage of the total load to be connected to a telephone loop which is used
by the device, to prevent overloading. The termination on a loop may consist of
any combination of devices, subject only to the requirement that the total of the
load numbers of all the devices does not exceed 100.

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®
Normas Ociales Mexicanas (NOM) electrical
safety statement
Instrucciones de seguridad
1 Todas las instrucciones de seguridad y operación deberán ser leídas antes de
que el aparato eléctrico sea operado.
2 Las instrucciones de seguridad y operación deberán ser guardadas para
referencia futura.
3 Todas las advertencias en el aparato eléctrico y en sus instrucciones de
operación deben ser respetadas.
4 Todas las instrucciones de operación y uso deben ser seguidas.
5 El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca
de la tina de baño, lavabo, sótano mojado o cerca de una alberca, etc.
6 El aparato eléctrico debe ser usado únicamente con carritos o pedestales
que sean recomendados por el fabricante.
7 El aparato eléctrico debe ser montado a la pared o al techo sólo como sea
recomendado por el fabricante.
8 Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más
allá a lo descrito en las instrucciones de operación. Todo otro servicio deberá
ser referido a personal de servicio calicado.
9 El aparato eléctrico debe ser situado de tal manera que su posición no
interera su uso. La colocación del aparato eléctrico sobre una cama, sofá,
alfombra o supercie similar puede bloquea la ventilación, no se debe
colocar en libreros o gabinetes que impidan el ujo de aire por los oricios
de ventilación.
10 El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor
como radiadores, registros de calor, estufas u otros aparatos (incluyendo
amplicadores) que producen calor.
11 El aparato eléctrico deberá ser connectado a una fuente de poder sólo
del tipo descrito en el instructivo de operación, o como se indique en el
aparato.
12 Precaución debe ser tomada de tal manera que la tierra sica y la
polarización del equipo no sea eliminada.
13 Los cables de la fuente de poder deben ser guiados de tal manera que
no sean pisados ni pellizcados por objetos colocados sobre o contra ellos,
poniendo particular atención a los contactos y receptáculos donde salen del
aparato.
14 El equipo eléctrico debe ser limpiado únicamente de acuerdo a las
recomendaciones del fabricante.
15 En caso de existir, una antena externa deberá ser localizada lejos de las
lineas de energia.
16 El cable de corriente deberá ser desconectado del cuando el equipo no sea
usado por un largo periodo de tiempo.
17 Cuidado debe ser tomado de tal manera que objectos liquidos no sean
derramados sobre la cubierta u oricios de ventilación.
18 Servicio por personal calicado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su
desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.

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www.ctxd.com
Documentation by:
© 2005 Black Box Corporation
All trademarks are acknowledged.
Black Box Corporation,
1000 Park Drive,
Lawrence,
PA 15055-1018,
United States of America
Tel: [phone]
Fax: [phone]
Black Box Network Services (UK) Ltd,
464 Basingstoke Road,
Reading,
Berkshire, RG2 0BG,
United Kingdom
Tel: [phone]