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shawnfabiancollins
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 Posted: Sun Nov 22, 2009 7:48 pm Post subject: sony avd-k800p speakers buzzing |
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| sony avd-k800p dvd player after about an hour will start buzzing in speakers or have a distorted sound |
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Pentode
Joined: 30 Oct 2007
Posts: 85
Location: Nr. Manchester (UK)
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| Posted: Sun Nov 22, 2009 9:17 pm Post subject: |
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Presumably this had all been working normally and this fault developing.
Sounds like one of the output devices in the amplifier be it chips or transistors is breaking down..... or it could be a capacitor or regulator that is causing the problem.
From you description it sound like a screwdriver and test meter job at the bare minimum, a circuit diagram would help to determine the correct voltages etc.
Dave |
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Pentode
Joined: 30 Oct 2007
Posts: 85
Location: Nr. Manchester (UK)
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| Posted: Sun Nov 22, 2009 9:22 pm Post subject: |
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Sorry I forgot to add...
... if the fault clears with the DVD player disconnected then the fault lies withing the DVD player itself AND NOT the amplifier, which would point down to a capacitor or regulator problem in the DVD player.
Dave |
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minnie
Joined: 18 Aug 2005
Posts: 2877
Location: Hell
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| Posted: Mon Nov 23, 2009 2:30 am Post subject: |
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| Replace the audio IC 903 #6-700-813-01 |
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Marvin
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| Posted: Sat Mar 06, 2010 7:25 am Post subject: perfect fix! |
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This thread saved my stereo from meeting the scrap bin...  Careful which IC903 you go after, I had removed an 8-pin SOIC on one board before the mystery part arrived in the mail... There is another IC903 on the main board, an insulated 5-pin TO-220 power package IC with no heatsink, that's the one, it's an easy fix. |
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Marvin
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| Posted: Sat Mar 06, 2010 10:09 am Post subject: wait |
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Scratch my last post.  Buzzing is back. This thread wasted $30 and several hours of effort. |
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jts1957
Joined: 24 Nov 2008
Posts: 2475
Location: Far, Far Away
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| Posted: Sat Mar 06, 2010 3:37 pm Post subject: |
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Check the solder joints on the main "+/-" power supply filter electrolytics.
_________________
You're over there, I'm over here. |
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anton chushev
Joined: 06 Mar 2010
Posts: 1
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| Posted: Sat Mar 06, 2010 7:12 pm Post subject: Re: perfect fix! |
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| Marvin wrote: | | This thread saved my stereo from meeting the scrap bin... Careful which IC903 you go after, I had removed an 8-pin SOIC on one board before the mystery part arrived in the mail... There is another IC903 on the main board, an insulated 5-pin TO-220 power package IC with no heatsink, that's the one, it's an easy fix. | Whats up,man? |
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minnie
Joined: 18 Aug 2005
Posts: 2877
Location: Hell
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| Posted: Mon Mar 08, 2010 4:10 am Post subject: Re: perfect fix! |
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| anton chushev wrote: | | Marvin wrote: | | This thread saved my stereo from meeting the scrap bin... Careful which IC903 you go after, I had removed an 8-pin SOIC on one board before the mystery part arrived in the mail... There is another IC903 on the main board, an insulated 5-pin TO-220 power package IC with no heatsink, that's the one, it's an easy fix. | Whats up,man? |
He didn't get the "free" info to fix it. So he spent $30 and it didn't solve the problem. |
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