Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
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 7th November 2017, 06:58 PM   #4511
nielsek is offline nielsek
diyAudio Member
 
Join Date: Nov 2014
Thanks Ian for great products.
I hope itís the right thread to ask for help with my McFIFO and McDualXO. Until recently, Iíve been using them successfully with Curryman DAC (ES9023). Now McFIFO cant get a lock and McDualXO D1/D2 LEDís keep flashing when playing audio. No sound comes out. I measured voltages and on board XO REG (U13) OUT voltage is only 1.15v. I believe it should be 3.3v, what should I do next?
  Reply With Quote
Old 7th November 2017, 09:29 PM   #4512
iancanada is offline iancanada  Canada
diyAudio Member
 
iancanada's Avatar
 
Join Date: Dec 2009
Location: Toronto
Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter
Quote:
Originally Posted by nielsek View Post
Thanks Ian for great products.
I hope itís the right thread to ask for help with my McFIFO and McDualXO. Until recently, Iíve been using them successfully with Curryman DAC (ES9023). Now McFIFO cant get a lock and McDualXO D1/D2 LEDís keep flashing when playing audio. No sound comes out. I measured voltages and on board XO REG (U13) OUT voltage is only 1.15v. I believe it should be 3.3v, what should I do next?
Hi ,

No worry.

1. Measure output voltage of U13 with both XO1 and XO2 removed;
2. If it is still low, measure the input voltage of U13.

Regards,
Ian
  Reply With Quote
Old 8th November 2017, 05:02 AM   #4513
nielsek is offline nielsek
diyAudio Member
 
Join Date: Nov 2014
Thanks Ian for prompt feedback. Here are the U13 IN & OUT with different power sources and clocks:
Code:
reg clocks + fifo power (J18)	5,08	1,17
NO clocks + fifo power (J18)	5,16	1,19
NO clocks + SilentSwitcher 	5,47	1,22
reg clocks + SilentSwitcher 	5,53	1,23
CCHD-957 + SilentSwitcher	5,56	1,24
Anything we can conclude from this?

Quote:
Originally Posted by iancanada View Post
Hi ,

No worry.

1. Measure output voltage of U13 with both XO1 and XO2 removed;
2. If it is still low, measure the input voltage of U13.

Regards,
Ian
  Reply With Quote
Old 9th November 2017, 11:56 PM   #4514
canvas is offline canvas  Taiwan
diyAudio Member
 
Join Date: Nov 2003
Location: Taiwan
Quote:
Originally Posted by nielsek View Post
Anything we can conclude from this?
Without the XO (and power-off), you can measure the resistance of v-out and ground to see if they are shorted.
__________________
FS: BUF03,OPA627,AD797,AD844,LT1028... Here
  Reply With Quote
Old 10th November 2017, 04:58 AM   #4515
nielsek is offline nielsek
diyAudio Member
 
Join Date: Nov 2014
Quote:
Originally Posted by canvas View Post
Without the XO (and power-off), you can measure the resistance of v-out and ground to see if they are shorted.
Thanks. I measured the reading between GND and OUT on XO LDO REG (U13), with and w/o XO's installed. There was no reading, so shouldn't be short.
What next should I check?
  Reply With Quote
Old 10th November 2017, 11:22 AM   #4516
canvas is offline canvas  Taiwan
diyAudio Member
 
Join Date: Nov 2003
Location: Taiwan
Quote:
Originally Posted by nielsek View Post
Thanks. I measured the reading between GND and OUT on XO LDO REG (U13), with and w/o XO's installed. There was no reading, so shouldn't be short.
What next should I check?
Have you ever reversed the v-in polarity accidentally? I once damaged the lt3042 due to incorrect input polarity.
__________________
FS: BUF03,OPA627,AD797,AD844,LT1028... Here
  Reply With Quote
Old 10th November 2017, 03:05 PM   #4517
nielsek is offline nielsek
diyAudio Member
 
Join Date: Nov 2014
Quote:
Originally Posted by canvas View Post
Have you ever reversed the v-in polarity accidentally? I once damaged the lt3042 due to incorrect input polarity.
Definitely not lately as haven't changed anything on McDualXO DC input. Can't confirm if ever. Any easy way to check it, without breaking off the LDO and replacing it?
  Reply With Quote
Old 11th November 2017, 06:40 PM   #4518
MeiT is offline MeiT  Germany
diyAudio Member
 
Join Date: Nov 2014
Danke
Attached Images
File Type: jpg X1.jpg (307.0 KB, 350 views)
File Type: jpg x2.jpg (927.9 KB, 340 views)
  Reply With Quote
Old 12th November 2017, 11:29 PM   #4519
canvas is offline canvas  Taiwan
diyAudio Member
 
Join Date: Nov 2003
Location: Taiwan
Quote:
Originally Posted by nielsek View Post
Definitely not lately as haven't changed anything on McDualXO DC input. Can't confirm if ever. Any easy way to check it, without breaking off the LDO and replacing it?

If there is no short on the output, I'm afraid you have a faulty regulator on board. The power section of XO is quite simple and straight forward.
__________________
FS: BUF03,OPA627,AD797,AD844,LT1028... Here
  Reply With Quote
Old 14th November 2017, 11:40 AM   #4520
Henderson is offline Henderson
Banned
 
Join Date: Jul 2017
Hi,


WHat is the Bclk speed at the output of the IanCanada Clock board with normal speed and the PCM board with full speed (not halfed) please ?


For a 44.1/16 material is it 44.1 K Hz x 16 (bits) x 2 (stereo channels) : 1.4112 M Hz ???


Need it to choose a divider for DEM feeding on a TDA1541A dac !


help much appreciated,


regards


H.
  Reply With Quote

Reply


Asynchronous I2S FIFO project, an ultimate weapon to fight the jitterHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
exaU2I - Multi-Channel Asynchronous USB to I2S Interface exa065 exaDevices 1406 4th June 2018 01:47 AM
XMOS-based Asynchronous USB to I2S interface Lorien Digital Line Level 3175 1st April 2018 04:24 PM
DAC chip selection + I2S jitter questions drwho9437 Digital Line Level 2 26th July 2010 12:50 PM
Simple FIFO to I2S CPLD, for MCU players / reclocking KOON3876 Digital Line Level 21 19th September 2008 04:00 PM
asynchronous reclocking and low jitter clocks ash_dac Digital Source 3 8th February 2005 09:22 AM


New To Site? Need Help?

All times are GMT. The time now is 07:56 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki