Help needed with zero DAC problem - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 10th August 2010, 09:24 PM   #1
hihopes is offline hihopes  South Africa
diyAudio Member
 
Join Date: Sep 2004
Location: Cape Town
Default Help needed with zero DAC problem

I got a shock from another piece of equipment while touching the chassis of my zero DAC and now it doesnít give any output. (Signal gnd is tied to chassis gnd). All the ledís on the pcb light up normally, including the led that shows the presence of a digital signal. I have tried using spdif and optical inputs and I have tried pushing the reset button, but no luck. The regulators are all working and giving correct voltages. Anyone have any bright ideas what may be wrong? Could it be some kind of reset that is required, or is it more likely to be a blown IC (or two).
  Reply With Quote
Old 12th August 2010, 02:00 PM   #2
RIP
 
Join Date: Oct 2005
Location: Central Florida
Sounds like a writeoff unless you have a scope. Send it back if you can. Grounding the signal to the chassis is just not done any more, WUWTS? (What's up with that s--t)
  Reply With Quote
Old 12th August 2010, 10:41 PM   #3
hihopes is offline hihopes  South Africa
diyAudio Member
 
Join Date: Sep 2004
Location: Cape Town
Thanks Bill. Out of guarantee. Been a good unit til I stuffed it up. Is it not worthwhile replacing the DAC chip?
  Reply With Quote
Old 12th August 2010, 11:38 PM   #4
RIP
 
Join Date: Oct 2005
Location: Central Florida
That's a tough call unless you can be sure that is the problem. It could be the receiver chip or some other thing. If you're up to it, replace them both if you need to, they're not very expensive. The fact that you got a shock from it is troubling though.
  Reply With Quote
Old 15th August 2010, 07:53 PM   #5
hihopes is offline hihopes  South Africa
diyAudio Member
 
Join Date: Sep 2004
Location: Cape Town
I didn't get a shock from it, I transmitted a shock to it from another piece of faulty equipment. I will get someone else to do the actual replacing of chips, as I am not up to working with suface mount chips myself. Are there any other chips that might be damaged (besides the output opamp, which is not being used)
  Reply With Quote
Old 15th August 2010, 08:36 PM   #6
RIP
 
Join Date: Oct 2005
Location: Central Florida
If this unit has auto switching for the inputs it will have some kind of microcontroller chip in it too. Have you checked the opamp outputs to see if they are working? I'm assuming you have been using the headamp output.
  Reply With Quote
Old 16th August 2010, 01:58 PM   #7
hihopes is offline hihopes  South Africa
diyAudio Member
 
Join Date: Sep 2004
Location: Cape Town
As this unit has the capability of balanced output, I have 2 sets of (unbalanced) analogue outputs - 1 direct and 1 via opamp. Neither is working. I was concerned that maybe there may be some other ic's damaged, eg clock, oscillator, filter etc.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help needed on Gigawork DAC !!! nick974 Digital Line Level 11 17th April 2012 10:13 PM
CDM9 /65 problem, help needed! Malefoda Digital Source 9 20th November 2009 10:36 PM
Problem with my speakers, help needed... cchean Multi-Way 2 22nd September 2009 08:22 PM
DAC - Opinion needed Faust3D Digital Source 45 20th November 2007 10:25 PM
monica dac help needed giantstairs Swap Meet 0 28th September 2007 04:39 PM


New To Site? Need Help?

All times are GMT. The time now is 02:30 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