User Guide
8
A-2000 7 Channel Amplier
Instruction Manual
9
Troubleshooting
Your A-2000 is designed to provide years of trouble free operation. However,
as with any sophisticated electronic device, there may be occasional problems
upon initial installation, or during the life of the unit. The items on this list are
a brief guide to the minor problems that you may be able to correct yourself.
If these solutions do not rectify a problem, or if the problem persists, contact
your Atlantic dealer/installer or us for assistance.
Protection Circuitry
Your amplier uses advanced protection circuitry that does not require fuses.
In the event that the amplier senses a shorted speaker wire, DC voltage
on an input connection or thermal overload creates a condition that could
potentially cause damage to the unit or to your speakers, it will automatically
shut down. If this should happen, rst check all speaker wire connections,
both at the speakers themselves and at the speaker terminals on the back of
the A-2000 to make certain that none of the strands from any channel touch
another channel, and that none of the strands from a "positive" terminal
touch those from a "negative" terminal. Even a few stray wire strands can
cause the unit to go into protection mode.
After checking all speaker connections, turn the unit back on. If it continues
to turn off, disconnect the speakers one by one and try the amplier again,
after disconnecting each one, to see if one speaker (or wire) is causing the
problem. If all potential sources of trouble check out OK, contact your dealer
or us for further assistance and information.
Service Information
A-2000 contains no user serviceable parts. If you suspect a problem that may
require service assistance, contact your Atlantic Technology dealer/installer
or us or by phone at 781-762-6300. It is important that any repairs be carried
out only by an authorized service agent. This will assure proper service and
preserve the protection of your Limited Warranty/Free Extended Service
Agreement. Keep your sales slip or receipt in a safe place with this manual as
well as your Extended Service Agreement certicate so that it will be available
to verify coverage, should you experience a covered problem.
A Few Words About Hum and Noise
Audible hum, or a discernable low frequency noise, is one of the most com-
mon problems in audio/video systems. This hum, which may be present
even when the volume is at a low level or when the power is off, is usually
caused by a situation known as a ground loop . A ground loop occurs when
there is a difference in ground voltage potential between two or more pieces
of equipment in the system. For example, there could be an electrical ground
for the main electrical service that is connected to a cold water pipe in the
basement and a ground rod driven into the earth outside the house for the
cable TV system. If two or more components are connected electrically
(through RCA cables, antenna leads, etc.) and they are also connected to
both ground systems (the house AC plugs and the cable TV system in our
example) multiple potential ground current paths exist. This can and often
does cause low-level noise, hum, and an increased possibility for damage
due to lightning strikes.
The growing sophistication of home theater systems, and the increased num-
ber 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 components in your system are the cause of the hum, in many cases
the cause may be due to these other conditions. In particular, cable TV con-
nections from outside the house (as noted above) 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.
Troubleshooting
Troubleshooting Guide
Problem Solutions
Amplier will not turn on Master Power Switch turned off (No power light LED)
Turn on Master Power Switch
Amplier will not turn on Remote trigger cable not properly connected
Verify connection of trigger cable at both ends
Amplier turns on, but no audio from Input plugs not connected to proper jack or are loose
one or more channels Check input connections
No audio from one or more channels Speakers not connected properly
Check speaker connections at amp and speaker
Audio levels differ Improper settings or output levels from the processor or controller
Check the settings on your preamp, processor or controller
Audio plays, then cuts off Amplier shorted
Check speaker connections for short circuit at amp and speaker