PS Audio C-100, P-200 manual Finding a ground loop Process of elimination, Troubleshooting

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Troubleshooting

Owner’s Reference P-200 Preamplifier C-100 Control Amplifier

Finding a ground loop

Process of elimination

It could be the cable TV

Problems with subwoofers

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

finding 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

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