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20th December 2012, 09:08 PM
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#21 |
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diyAudio Member
Join Date: Jun 2012
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How do i test to see if the opto-coupler is being driver to bias or if its not being driven on??
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20th December 2012, 09:16 PM
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#22 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Measure the DC voltage across pins 1 and 2 from the time that remote is applied and for about another 10 seconds. It should go from about 0v to about 1.2v DC.
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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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20th December 2012, 09:31 PM
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#23 |
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diyAudio Member
Join Date: Jun 2012
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There are 2 Opto -couplers in this amp 1 of them goes from 0 to 1.01 volts
The other 1 stays at -0.46 volts across pins 1 and 2 |
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20th December 2012, 09:53 PM
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#24 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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For the one that goes from 0 to 1v, measure the voltage on the other side of it. Does it go from about 70v to about 0v?
__________________
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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20th December 2012, 11:14 PM
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#25 |
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diyAudio Member
Join Date: Jun 2012
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It goes from 60.5 volts to 0 volts
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20th December 2012, 11:22 PM
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#26 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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You should see oscillation on the output transistors when that switches to 0v. Do you see oscillation on the outputs?
Do you see any DC offset after it switches?
__________________
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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20th December 2012, 11:32 PM
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#27 |
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diyAudio Member
Join Date: Jun 2012
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The DC offset goes from 2.22 volts when powerd up to 0 volts when it switches..
Yes i see oscillation on the outputs |
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20th December 2012, 11:37 PM
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#28 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Are you getting a preamp level signal to the amplifier section of the amp?
Did you compare it to the sony XM-D400P5?
__________________
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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20th December 2012, 11:50 PM
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#29 |
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diyAudio Member
Join Date: Jun 2012
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I dont have the service manual for the sony..
The audio is not reaching the Amplifier section of this amp |
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21st December 2012, 12:16 AM
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#30 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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email me
babin_perry@yahoo.com
__________________
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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