assembled AMP 4 pics

[Mr T]

Hi everybody

I completed the assembly yesterday and I thought it might be of interest to post some pics :

http://www.dcx2496.fr/photos/Tripath_41Hz_AMP4.jpg
http://www.dcx2496.fr/photos/Tripath...P4_dessous.jpg
http://www.dcx2496.fr/photos/tk2050.jpg


Soldering of the Tripath chip is definitely NOT for the faint hearted [:0]

I'm about to compare a classic 120VA 2 x 21Volts (secondaries wired in parallel) power transformer against a 26volts 100watt switching power supply (SMPS).,I'll let you know what's best.

Mr T

[Les Fuller]

Hi Mr T,

In the third photo, it looks like pins 19 and 20 of the TK2050 are soldered together, according to the schematic and the PC board layout, these are separate. Pins 19 & 1 together go to ground. Pin 20 to C30 then to pins 21&22.

Yeah, soldering the chip is NOT for the everyone. BTW, GREAT pics!

Hope this might help.

Les

[Reverie]

Looks good!

[Mr T]

Hi Les,

Yes, it does help ! Thanks for this

Mr T

[Mr T]

I used the soldering iron and the wick, I hope this is better :

http://www.dcx2496.fr/photos/2050.jpg

Mr T

[woodmancy]

Mr T

Your photos are really good - is this the way you check to see if your soldering these very small parts is OK. If so, what are your camera settings for something like this?

[Mr T]

quote:Originally posted by woodmancy
[br]... what are your camera settings for something like this?

Ah ah, this is my little secret

Well, no actually there's no secret and it's very simple : I put the board onto my flatbed scanner and I set the resolution to 1200dpi, and voila !

Mr T

[ebag4]

Mr. T, outstanding tip! Thanks.

Ed

[Les Fuller]

You do good very clean reworks Mr T!


Great job!


Les

[ledim]

Hi Thierry,

is the amp4 now working ? How does it compare to the other class D-T amp you tried ?