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24th February 2013, 09:54 PM
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#1 |
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diyAudio Member
Join Date: Jun 2010
Location: the caribbean
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BRZ 1700.1d
hi all
This amp came in with one shorted output.I remove all the outputs from the board. I have both - + reg and rail voltage.some one did some work on this amp before i got it.I want to find out on what settings should i put my scope on to take some test on the output pads to make sure everything is ok .Also what wave form should i see on them. (Learning to used scope tektronix 2215A pic1 is the first leg on my PS FETs (5v div 10vus pic 2 center leg (5v div 10us Do they look ok for this amp? |
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24th February 2013, 10:03 PM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Read the 'best initial settings' section on page 73 of the car audio site.
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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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26th February 2013, 03:21 AM
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#3 |
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diyAudio Member
Join Date: Jun 2010
Location: the caribbean
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Ok scope is now set at 10v/div 10us/div
first pic is gate of the PS FET second pic the the center leg third pic is pin 10 and 9 of the pwm IC what point can i test with the scope to know if the output section is ok? I replace all output FETs and drivers.Amp is playing good audio. |
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27th February 2013, 12:34 PM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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The speaker terminal would be the best place to check the audio unless you have a reason to think that there is a problem elsewhere.
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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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28th February 2013, 12:55 AM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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This was covered in the best initial settings section.
For audio, start with 2ms and 10v/div and adjust from there. The output should be a higher amplitude version of the input signal.
__________________
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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