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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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LOgitech X-220 Beeps
Hi,
my good (?) old Logitech X-220 PC speakers start to whistle very loud as soon as I power them up. Any idea or schematic? Thanks Frank |
#2
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LOgitech X-220 Beeps
On Nov 26, 1:05*am, Frank-Stefan Müller wrote:
Hi, my good (?) old Logitech X-220 PC speakers start to whistle very loud as soon as I power them up. Any idea or schematic? Thanks Frank Unplug them from the computer and see if the problem is in the speaker amplifier or the sound chip circuit. If in the speaker amp, turn the volume control down and see if the whistle goes up and down. If not, look into the power supply for the speaker amp. If it does vary, look at the power supply as well as the caps in the amplifier circuit. Neil S. |
#3
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LOgitech X-220 Beeps
On Fri, 26 Nov 2010 10:05:51 +0100, Frank-Stefan Müller wrote:
Hi, my good (?) old Logitech X-220 PC speakers start to whistle very loud as soon as I power them up. Any idea or schematic? Thanks Frank Cell phone. -- Don't **** with me. I'm tuff. And stupid but don't dare **** with me. |
#4
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LOgitech X-220 Beeps
On Fri, 26 Nov 2010 07:59:45 -0800 (PST), nesesu wrote:
On Nov 26, 1:05*am, Frank-Stefan Müller wrote: my good (?) old Logitech X-220 PC speakers start to whistle very loud as soon as I power them up. Any idea or schematic? Unplug them from the computer and see if the problem is in the speaker amplifier or the sound chip circuit. If in the speaker amp, turn the volume control down and see if the whistle goes up and down. If not, look into the power supply for the speaker amp. If it does vary, look at the power supply as well as the caps in the amplifier circuit. As well, look for some new, "noisy" electronic gee-gaw that you've recently installed nearby. Jonesy -- Marvin L Jones | jonz | W3DHJ | linux 38.24N 104.55W | @ config.com | Jonesy | OS/2 * Killfiling google & XXXXbanter.com: jonz.net/ng.htm |
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