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Autotek KMX2000
Autotek KMX2000
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Old 20th October 2019, 02:40 PM   #21
AzeemSA is offline AzeemSA  South Africa
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Join Date: Nov 2018
Location: Durban
Autotek KMX2000
hi Perry

yes oddly enough there were zero parts needing replacing on the driver boards. even the blown channel had a fully functional driver board. my inexperience/misdiagnosis led me to remove the driver boards bugger a trace or 2, but needless to say, i was impressed.

im officially a fan of the tl072+LM319 driver board
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Old 21st October 2019, 04:51 PM   #22
AzeemSA is offline AzeemSA  South Africa
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Join Date: Nov 2018
Location: Durban
Autotek KMX2000
Hi Perry

i have purchased a scope today and am very excited to start using it.

i cracked open the bottom plate of my SSA class D(X) amp and scoped the high and low side drive signals.

from what barevids says, the low side seems perfect. im not too sure about the high side. this design of amp uses the lm319 and tl072 pair driver configuration. i have a HIP4080 amp that im about to crack open just to compare drive waves.



i have attached the pics below, please advise if these drive waves are generally correct.

kind regards
Attached Images
File Type: jpg Low side.jpg (301.4 KB, 9 views)
File Type: jpg High side.jpg (329.7 KB, 9 views)

Last edited by AzeemSA; 21st October 2019 at 04:58 PM.
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Old 21st October 2019, 06:47 PM   #23
Perry Babin is offline Perry Babin  United States
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Join Date: Nov 2003
Location: Louisiana
You can't determine if the drive signal is good on AC coupling since you have to know how close it gets to the voltage on the source leg of the transistor.

Look at the swf file in the performance technique folder of the tutorial for waveforms. Maximize and right-click to zoom in.
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