PS Audio TRIO C-100 - Manual (Page 11)

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Troubleshooting 7
®
Troubleshooting
©2006 PS Audio International Inc. All rights reserved.
Owner’s Reference P-200 Preamplifi er C-100 Control Amplifi er
If the hum/buzz goes away when you remove the inputs to the power amp or Control amp, your next
step will be to reconnect the amp and move further down the chain. Disconnect all inputs to the C-100
or the power amplifi er you are using to connect to the outputs of the P-200 preamplifi er. Once these
are disconnected, turn the system on and again, listen for hum. Should the hum now appear, it is a
problem with your power amp or Control amp.
If you determine that there is still no hum present when the power amp or Control amp is connected
with no inputs, then selectively begin plugging in your various inputs one at a time until the system is
connected again. After each connection, check for hum until you discover the humming culprit.
VCR’s, surround
processors, and any
device that is connected
to a television cable or
satellite dish can cause
a loud buzz and should
always be suspect.
If, by the process of
elimination described
above, you determine
it is a component like a
VCR that is causing the
hum/buzz to occur, and
using a cheater plug or
removing the ground
pin on a PS xStream
Power Cable doesn’t
help matters, it may be
necessary to isolate the
cable connection (CATV)
with an isolation transformer. This inexpensive device is available at most Wal Mart, Radio Shack or
department store type outlets and is sometimes called a ‘matching transformer’. If you have problems
fi nding one, call your local cable TV company for advice. The matching transformer will be placed
between the cable TV cord and the VCR, TV or processor.
Just remember, take the system down to its simplest level of connection. Find a way to hook the
system up with as many pieces of the system missing or not connected. Keep it simple and get it
to the point where the hum’s gone. Then start adding back components one at a time until the hum
returns.
Finding the problem is 9/10th of the work in fi nding a solution.
If you have a problem connecting a subwoofer, please refer to the quick start guide in the front of
this manual. We do not recommend connecting the high level inputs of a self power subwoofer to
the outputs of the Trio. For many subwoofers it will be fi ne. Some, like the REL subwoofers, and the
Finding a ground
loop
Process of
elimination
It could be the
cable TV
Problems with
subwoofers