diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Digital Source (http://www.diyaudio.com/forums/digital-source/)
-   -   Do you have a Gigawork DAC? Is this a mistake? (http://www.diyaudio.com/forums/digital-source/162647-do-you-have-gigawork-dac-mistake.html)

ciagon 6th March 2010 01:15 AM

Do you have a Gigawork DAC? Is this a mistake?
 
I ordered a gigawork DAC on ebay and it showed up two days ago but something does not look right. I sent an email to the seller but have not yet heard back. If anyone has this DAC can you tell me if this is the same on yours?

http://ciagon.dnsalias.com/photos2/i...ion_on_dac.jpg

It does work but I am leaving it off just in case this is a problem. I can do the fix no prob but I figured there is a chance this was intentional. Any help is appreciated.

stephensank 6th March 2010 04:01 AM

This looks clearly like an intentional 'kludge', either due to a mistake found in the circuit board design, post-production change to that design, or possibly due to a trace damaged during assembly. Clearly not erroneous & nothing to worry about.

prairiemystic 7th March 2010 09:30 AM

Do you have a Gigawork DAC? Is this a mistake?
 
It's okay to run your board. They are changing the recovered master clock frequency from 256*Fs to 128*Fs. I'm not sure what freq. is coming into your CS8416. Do you have a CS8421 chip or CS4397, there's a lot of options for the DAC board.

----------------------------------
The schematic I have for LM-DAC3 V5 has several errors. It shows CS8416 pulldowns on pins 15, 17, 18 and pullups on pins 16, 19 to give:

schematic
pins
15 =0 SFSEL1=0
16 =1 Emphasis Audio Match ON
17 =0 Serial Port Slave Mode
18 =0 RMCK Freq=256*Fs
19= 1 SFSEL1=1

From your picture, that resistor is from pin 18 on the CS8416. It is jumpered to the other side (+3.3V) of the resistor on pin 19, instead of ground to give:

pins
15 =0 SFSEL1=0
16 =0 Emphasis Audio Match OFF
17 =1 Serial Port Master Mode
18 =1 RMCK Freq=128*Fs
19= 1 SFSEL1=1

ciagon 8th March 2010 04:57 AM

Thanks for the replies. Mine has a CS4398. Looks like I got a lot of things to try out once I get the case finished.

stratus46 8th March 2010 05:29 AM

Quote:

Originally Posted by stephensank (Post 2108998)
This looks clearly like an intentional 'kludge', either due to a mistake found in the circuit board design, post-production change to that design, or possibly due to a trace damaged during assembly. Clearly not erroneous & nothing to worry about.

You obviously have never seen the inside of Sony Broadcast equipment. That board is a work of art compared to the Sony stuff.

G


All times are GMT. The time now is 01:50 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2