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19th February 2010, 02:10 AM
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#1 |
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diyAudio Member
Join Date: Sep 2006
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Kenwood 7202
I got this amp in for repair and all the fets were toasted and the 2 3900 uf caps popped. Replaced all of them (fets and caps) amp still is dead no power light no output.
tl494 readings are pin1=0.95 pin2=1.79 pin3=.06 pin4=0.12 pin5=0.47 pin6=0.73 pin7=0 pin8=2.83 pin9=2.26 pin10=2.32 pin11=2.82 pin12=2.82 pin13=1.99 pin14=1.99 pin15=1.99 pin16=0 wondering if this is defective or wondering what else it could be?? |
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19th February 2010, 02:48 AM
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#2 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Post the DC voltage on all 3 pins of Q604.
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19th February 2010, 03:10 AM
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#4 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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It's defective.
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19th February 2010, 03:12 AM
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#6 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Q604.
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19th February 2010, 03:23 AM
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#8 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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You can sub lots of parts. Which PNP transistors do you have?
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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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19th February 2010, 03:38 AM
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#10 |
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diyAudio Member
Join Date: Nov 2003
Location: Louisiana
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Install the 6491 facing the opposite direction (13v on leg 3).
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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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