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10th January 2011, 05:40 AM
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#1 |
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diyAudio Member
Join Date: Sep 2006
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Directed 650 5 channel amp
I got this amp in for repair. The problem im having is the Output thats outlined has 22 volts on the first leg and 22 volts on the second leg and 0 volts on the 3rd leg . The driver thats circled has 26 volts on all 3 legs And the resistor that connects to the driver gets so hot it desolders itself from the board.
Any ideas on where to begin looking? Last edited by mike49504; 10th January 2011 at 05:48 AM. |
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10th January 2011, 07:47 AM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Photo?
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10th January 2011, 02:27 PM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Can you post a photo of the bottom of the board covering the same section of the board?
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Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links |
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10th January 2011, 03:12 PM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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I'd suspect that Q209 or Q211 is leaking or shorted.
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10th January 2011, 03:35 PM
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#8 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Q211.
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10th January 2011, 04:01 PM
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#10 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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It may not be reading it correctly. It's next to Q207.
Left to right, what are each of the output transistors (TIP35/36)?
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