Outlaw 7000x, Руководство пользователя

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Model 7000x Seven-Channel Power Amplifier 11
Ground Loop Diagram
The Outlaw Model 7000x uses an external fuse to protect
event that a fuse replacement is required, be certain that a
fuse of the original rating is used. If a fuse continues to fail,
your unit may have developed a fault. In this event, please
contact us for assistance.
WARNING:
power cord from the AC Power before replacing the fuse.
Under some conditions, such as a shorted speaker wire,
DC voltage on an input connection or thermal overload,
the Outlaw 7000x will place itself in a protect mode to
prevent damage to the amplifier. When this happens
the front panel light will glow red and the amplifier
will mute to protect both the amplifier and speakers
from damage.
If this occurs in only one of the channels, the LED will
also glow red, but the other channels may continue
Audible hum, or a discernable low frequency noise, is one of
the most common problems in audio/video systems. This hum,
which may be present even when the volume is at a low level
as “ground loops.” A ground loop occurs when there is a dif-
ference in ground voltages between two or more components
that are connected electrically. This, in turn, creates multiple
current paths and causes the low-level noise, or hum.
The growing sophistication of home theater systems, and the
increased number of components used to create these systems
has dramatically increased the potential for the possibility of
ground loops. While it is natural to suspect that the compo-
nents in your system are the cause of the hum, in many cases
the cause may be due to other conditions. In particular, cable
TV connections from outside the house have become a major
source of hum.
In most cases, one of the following suggestions should help
you to solve a hum problem in your system. Please try these
steps in the sequence shown, proceeding from one step to the
next if the prior suggestion does not eliminate the problem.
Suggestion #1
To determine if a cable TV connection is responsible for
it connects to your components. Alternatively, discon-
nect the cable TV wire where it is connected at the wall
outlet. Turn your system back on, and listen if the hum
has disappeared. If removing the cable TV feed has
eliminated the hum, you will need to insert a Ground
Loop Isolator before reconnecting the cable TV feed, or
contact your cable TV operator to see if they can better
isolate your cable feed.
Suggestion #2
-
back on, and see if the hum is still present. If the hum
disappears, the fault may be in the input cables used. Try
replacing them with cables that have better shielding,
and make certain that the input cables are not running
on top of any AC power cords. Change the cables one at a
time to determine if one, or all cables is responsive. If the
hum disappears when the input cables are disconnected,
but returns after the cables are changed and the system
re-connected, the problem may be caused by your
Suggestion #3
Ground loop problems may also be caused by poor
grounding of the electrical system in your home, par-
ticularly when there are multiple components with three
prong, grounded, power cords. Try unplugging these
components one at a time, and see if one or all of them is
causing the problem. The ultimate solution to this type
of problem is to re-wire your house with an isolated, star
that this may be impractical and expensive. In some
cases, the use of an approved AC Power Isolation Trans-
Suggestion #4
Hum may also be caused by faulty earth grounds in your
home’s electrical system. In the past, cold water pipes were
often used for the earth ground, so it is important to make sure
that your ground connection is still valid and has not become
loose or corroded. The cold water pipe method may no longer
be valid in some locations due to requirements that the water
meter be isolated from the water mains with a length of PVC
pipe, thus interrupting the ground circuit. The safest, and most
reliable, approach may be to provide your own ground. This
can be accomplished by having a licensed electrician drive at
earth, and using that for your grounding connection.
Suggestion #5
If you have hum in your video display device (bars that roll up
through image at 12-14 second intervals), this may be related
to hum you also experience in your audio system. The previous
suggestion tips may help with this also. If not, try isolating the
ground in the projectors video signal cable with a base-band
video isolation transformer, such as the Jensen VB-1BB.
If the hum persists after all of the above suggestions have been
tried, contact the Outlaw Audio customer service department
for assistance.
WARNING:
If you suspect that the grounding system in
your home’s electrical wiring is causing the hum problem,
it is important that you do not make any changes to the wiring
yourself. Only a licensed electrician should make any changes to
household wiring, and they must be made in full compliance with
all local building, safety and electrical codes.
Protection Mode
to operate. Check to see which speaker(s) is no longer
operating.
Power button, and disconnect the AC power cord. Begin
by examining the channel that was no longer operating,
and then examine the rest of the speaker connections, to
make sure there are no shorts. Turn the unit back on. If
the unit continues to go into the protect mode, contact
us for assistance.
A Few Words About Hum and Noise
60Hz AC Ground Loop 60Hz AC Ground Loop
AC Ground
AC Line
A/V Cables
Main House Grounding
Cable Feed Coax Cable
AC Line
Set-top Box