challenger hum [message #6561] |
Tue, 17 January 2006 16:32 |
oldman93
Messages: 1 Registered: January 2006
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Junior Member |
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I'm trying to trouble-shoot a Challenger. When I switch the power on all I get is a low, pulsating hum. Can anyone point me in the right direction? Is it a problem with the transformer? Any suggestions would be helpful.
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Re: challenger hum [message #6565 is a reply to message #6561] |
Wed, 18 January 2006 11:34 |
chicagobill
Messages: 2005 Registered: April 2003
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Senior Member |
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Oldman93, Welcome to the board!
I myself have no info on the Challenger, but I doubt that your transformer is at fault here.
As Steve points out, it could be a power amp problem, or it could be a power supply problem or a pre-amp problem as well. First thing, try and isolate where the problem is. How loud is the hum? Is the hum affected by changing the volume or tone controls? Does the amp pass an audio signal? Are there any visible signs of damage? Burned or overheated components? Rust or corrosion? All of these questions will help point you in the right direction.
If you don't have one, get a copy of the schematic. Check the power supply voltages. Then check the power amp section and continue to work backwards through the amp until you find the fault.
There are dangerous voltages inside any amplifier. Work slowly and carefully, and never take on a project that is beyond your abilities.
Bill
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