Amp32 won't work...

v-bro · 21st November 2006, 04:03 AM

Hi,

I've bought a couple of AMP32's from 41hz.com

The first ones I built worked immediately (know the instruction manual thoroughly now...).

On the last one I accidentally shorted two of the schottky diodes (positive VDD to ground

). It happened when I but bolts through the two holes besides the chip the nuts made contact. Nothing visibly burned, no smoke or funny smell.

I allready replaced the chip and N channel FET, still no led burns, no sound...

All legs that need VDDand ground are connected to the chip (measured it from the supply input wires till the chip legs).

Any help highly appreciated...

v-bro · 21st November 2006, 04:05 AM

Oh yes and here's the datasheet (with schematic) of the evaluation board (claimed by certain people to be quite similar)..
http://www.41hz.com/downloads/EB-TA2021B_D.PDF

v-bro · 25th November 2006, 10:15 PM

Got another one that only produces rythmic clicks....
Anybody?

Some help would be appreciated a lot...

v-bro · 1st December 2006, 08:55 PM

Well thanks a lot everybody, just got them all running... Yippeeeee!

Measuring CAN help.....

21st November 2006, 04:03 AM	#1
v-bro diyAudio Member Join Date: May 2006	Amp32 won't work... Hi, I've bought a couple of AMP32's from 41hz.com The first ones I built worked immediately (know the instruction manual thoroughly now...). On the last one I accidentally shorted two of the schottky diodes (positive VDD to ground ). It happened when I but bolts through the two holes besides the chip the nuts made contact. Nothing visibly burned, no smoke or funny smell. I allready replaced the chip and N channel FET, still no led burns, no sound... All legs that need VDDand ground are connected to the chip (measured it from the supply input wires till the chip legs). Any help highly appreciated... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

21st November 2006, 04:05 AM	#2
v-bro diyAudio Member Join Date: May 2006	Oh yes and here's the datasheet (with schematic) of the evaluation board (claimed by certain people to be quite similar).. http://www.41hz.com/downloads/EB-TA2021B_D.PDF __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

25th November 2006, 10:15 PM	#3
v-bro diyAudio Member Join Date: May 2006	Got another one that only produces rythmic clicks.... Anybody? Some help would be appreciated a lot... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

1st December 2006, 08:55 PM	#4
v-bro diyAudio Member Join Date: May 2006	Well thanks a lot everybody, just got them all running... Yippeeeee! Measuring CAN help..... __________________ Max. cone displacement can be several foot on any speaker!Too bad it can be done only once......

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