ezDAC v.1.5 Builders Thread - Page 24

PJN · 9th March 2010, 07:15 PM

I made mounting rails out of wood, I'll post some pics tonite when I get home.

PJN · 10th March 2010, 11:00 PM

Here is how I mounted the PSU.

PJN · 13th March 2010, 02:06 PM

Hi Everybody,

I've completed my case and I'm am getting ready to power up my EZDAC but before I do I want to make sure that I have the power hooked up right. I am using just a single PSU for now. From the build pics that see on Evan's site I figure that V+ goes to V1, V- goes to V4 and G goes to G2, am I right ?

Thanks,

PJN

6h5c · 13th March 2010, 03:44 PM

That's right, and you have to solder the jumper wires between V1-V2 and V2-V3 in place.

Ray

PJN · 13th March 2010, 05:31 PM

Great, I'll give it a try this evening. I'll cross my fingers and hope I don't let the smoke out. Thanks Ray.

PJN

PJN · 13th March 2010, 10:20 PM

Hi all,

Well I hooked my EZDAC up, powered up, no smoke, but no sound either. Totally silent, maybe I don't have the jumpers hooked up correctly, or maybe something else is not right. I've attached some pics of my build, if you see anything wrong, or if you have any ideas of what to check for I'd really appreciate the input.

Thanks,

PJN

PJN · 13th March 2010, 10:22 PM

By the way here is the case, I left enough room to add another PSU so I can separate the analog and digital sections.

6h5c · 14th March 2010, 09:18 AM

You can start by checking the output voltages of the regulators, the tabs are connected to the output. You should measure 3.3V, 5V and 12V there. Careful with those heatsinks, don't let them touch each other, that's a good recipe for a short-circuit.

Ray

paulb · 14th March 2010, 09:07 PM

Quote:

Originally Posted by 6h5c

Y... the tabs are connected to the output. You should measure 3.3V, 5V and 12V there....

Ray

Except that the LM337 has a -12V output and it's not on the tab, but on pin 3.
http://www.national.com/ds/LM/LM137.pdf

ezkcdude · 14th March 2010, 09:08 PM

Maybe I'm missing something, but where is the +V coming in? is it going under the board from the PSU?

13th March 2010, 03:44 PM	#234
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	That's right, and you have to solder the jumper wires between V1-V2 and V2-V3 in place. Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

14th March 2010, 09:18 AM	#238
6h5c One Seriously Addicted to Audio and Electronics diyAudio Member Join Date: Apr 2004 Location: Heerhugowaard	You can start by checking the output voltages of the regulators, the tabs are connected to the output. You should measure 3.3V, 5V and 12V there. Careful with those heatsinks, don't let them touch each other, that's a good recipe for a short-circuit. Ray __________________ Gonna buy my little girl a pink soldering-iron The new DOS-CFP board is out!

14th March 2010, 09:08 PM	#240
ezkcdude diyAudio Member Join Date: Dec 2005 Location: Atlanta	Maybe I'm missing something, but where is the +V coming in? is it going under the board from the PSU? __________________ He's not hi-fi, he's my stereo. ShinyMetal

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9th March 2010, 07:15 PM	#231
PJN diyAudio Member Join Date: Dec 2004 Location: Pa, USA	I made mounting rails out of wood, I'll post some pics tonite when I get home.

13th March 2010, 02:06 PM	#233
PJN diyAudio Member Join Date: Dec 2004 Location: Pa, USA	Hi Everybody, I've completed my case and I'm am getting ready to power up my EZDAC but before I do I want to make sure that I have the power hooked up right. I am using just a single PSU for now. From the build pics that see on Evan's site I figure that V+ goes to V1, V- goes to V4 and G goes to G2, am I right ? Thanks, PJN

13th March 2010, 05:31 PM	#235
PJN diyAudio Member Join Date: Dec 2004 Location: Pa, USA	Great, I'll give it a try this evening. I'll cross my fingers and hope I don't let the smoke out. Thanks Ray. PJN

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