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Thread Tools | Search this Thread |
4th August 2012, 09:03 PM
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#1 |
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diyAudio Member
Join Date: Jun 2012
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Directed D2400
This amp had blown outputs and a couple of drivers that were bad ..
I removed all of the outputs and also removed the driverboard.. The 3 board locations marked in red is were the 9640's go .. It says i have 0.6 ohms between pads 1 and 2 on the main board even with the driverboard and all outputs removed.. I checked for solder bridges but found non.. The other side were the 9640's sit say i have 62 ohms between pads 1 and 2.. Any ideas what can cuase this ? |
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5th August 2012, 03:17 AM
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#3 |
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diyAudio Member
Join Date: Jun 2012
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Ok i solved that problem..
Next problem i have is the amp is stuck in protection mode .. Heres what i have on the 494 Pin 1:Pulses between 3.88 and 4.02 Pin 2:3.97 Pin 3:4.92 Pin 4:0.17 Pin 5:1.56 Pin 6:3.73 Pin 7:0 Pin 8:13.88 Pin 9:Pulsing between 0.12 and 0.43 Pin 10:0 Pin 11:13.90 Pin 12:13.58 Pin 13:5.07 Pin 14:5.07 Pin 15:5.07 Pin 16:0 |
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5th August 2012, 10:18 AM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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The shutdown of the power supply could be due to either pin 1 or 3 being driven high. What's connected to pin 1 and pin 3?
__________________
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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5th August 2012, 03:39 PM
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#5 |
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diyAudio Member
Join Date: Jun 2012
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Pin 1 connects to a C3198 transistor
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5th August 2012, 03:59 PM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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What leg does it connect to?
What is the voltage on all 3legs of the c3198?
__________________
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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5th August 2012, 04:44 PM
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#7 |
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diyAudio Member
Join Date: Jun 2012
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I replaced the C3198 now the amp powers up fine..
Im going to stick the rectifiers back in and see if i can get it to power up and produce audio |
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