Sunfire Symphonic Reference High Fidelity Control Center and Preamplifier - Manual (Page 13)

User's Manual
13
APPENDIX
The SunÞ re PreampliÞ er is ex-
pertly designed and built to provide
years of trouble-free per for mance.
Most problems that occur can usually
be solved by checking your setup or
making sure that the audio and video
components connected to the pro-
ces sor are on and fully op er a tion al.
The following information will help
you deal with com mon setup problems
you may experience during normal
use of your unit. If the problems still
persist, please contact your SunÞ re
Dealer for assistance.
No sound from one or
more speakers
• Speaker cables may have
come undone. Turn off your
system and check the cables,
and tighten the ampliÞ er and
speaker binding posts.
• Broken audio cable.
• The balance level is low for the
chan nel concerned.
• The Mute switch is on.
A Hum is heard in your
speak ers
This problem is more than likely
caused by a “ground loop” in your
system, rather than a fault in the pre-
ampliÞ er. Follow these steps to isolate
the main cause of the hum, there may
even be more than one.
• Remember to turn off all
components in your system, in-
cluding the preampliÞ er, before
disconnecting or con nect ing
any cables.
• Disconnect the following items
in order, and check each time if
the hum has gone away:
• Disconnect all cables which
come from outside the room,
such as cable TV, satellite
TV, or roof top antennas.
Make sure that they are
dis con nect ed where they
Þ rst enter the room, so they
are making no con nec tion to
the preampliÞ er or the TV, or
any other component. If the
hum is caused by the cable
TV line, then you will need a
“ground loop iso la tor.” This is
an inexpensive device Þ tted in
line with the coaxial cable feed.
Con tact your ca ble com pa ny or
your Sun Þ re Dealer for as sis -
tance.
• Disconnect all connections
from the preampliÞ er to your
TV, VCR or DVD.
• Disconnect any component
which has a grounded power
cord.
• If the hum persists, disconnect
all the source com po nents one
at a time from the back of the
preampliÞ er, until you identify
the prob lem.
• Ground loop isolators are avail-
able for audio lines and video.
You can ask your SunÞ re
Dealer for assistance.
• Try moving the speaker cables
away from any power cords.
Try just one speaker, connect-
ing it to different channels and
see if an ampliÞ er channel is
bad.
• If you are still having a prob-
lem, remember that SunÞ re’s
dealers and technical support
staff will assist you.
Other causes of noise
• Speaker noise may also be
caused by in ter fer ence or
noise on your AC line. Make
sure there are no large ap-
pli anc es sharing the line, or
halogen lamps or light-dimming
Triac devices.
Troubleshooting Guide
• Try connecting your system to
another AC socket on a sep-
a rate line.
• Keep power cords away from
audio cables.
• Do not place the preampli-
Þ er directly on top of a power
ampliÞ er.
• If the hum is heard from
within the preampliÞ er and
not through the speak ers, this
may also be caused by in ter -
fer ence on the AC or DC lines.
The power trans form ers may
turn this interference into an
audible noise. Internal hum can
be made worse by a shelf or
cabinet resonating, so try mov-
ing the preampliÞ er to another
shelf.
• Try moving your components
further away from the TV, es pe -
cial ly if you ever notice the
screen has changed color in
the area closest to the compo-
nent.
• If you have very high efÞ ciency
speak ers, these may show up
noise which other speakers
may not.
Remote will not work
• Make sure the batteries are not
dead.
• Make sure that the preampliÞ er
front panel receiver window is
not obstructed, or tilted away
from the listening position.
PreampliÞ er does not re-
spond to any controls
• Unplug AC power momentarily,
and press the Power button to
turn back on