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Thread Tools | Search this Thread |
18th February 2013, 10:37 PM
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#1 |
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diyAudio Member
Join Date: Jun 2012
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MTX Thunder 8302
Amp powers up but no output..
Amp produces + and -32 volts of rail and + - 15 volts of regulated voltage Any ideas on where to start? |
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18th February 2013, 10:45 PM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Confirm that you have both positive and negative supply voltage on all of the op-amps. There are resistors in the supply lines that sometimes open.
__________________
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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18th February 2013, 10:51 PM
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#3 |
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diyAudio Member
Join Date: Jun 2012
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I have + - 15 volts on all op-amps..
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18th February 2013, 10:53 PM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Does operating all switches and pots through their entire range make a difference (absolutely no sound, not even static/noise being produced by the amp)?
__________________
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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18th February 2013, 10:58 PM
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#5 |
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diyAudio Member
Join Date: Jun 2012
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I got the amp to produce some sound but very very low output..
Last edited by S Merlington; 18th February 2013 at 11:01 PM. |
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19th February 2013, 07:26 AM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Drive a strong signal into the amp and see which op-amps have audio on their output pins and which don't.
__________________
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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23rd February 2013, 08:14 PM
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#7 |
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diyAudio Member
Join Date: Jun 2012
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All of the NE5532 op-amps have signal on the output pins..
Both TL074's have signal on PINS 1,8,14 but the signal looks distorted.. there is no audio on pin 7 |
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24th February 2013, 01:17 AM
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#8 |
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diyAudio Member
Join Date: Jun 2012
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See post above any ideas?
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24th February 2013, 01:25 AM
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#9 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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With the black probe on the emitter and the red probe on the base, what is the DC voltage on Q303?
__________________
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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24th February 2013, 01:33 AM
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#10 |
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diyAudio Member
Join Date: Jun 2012
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0.60 volts
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