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.

cs4398 blown gigaworks big dac
cs4398 blown gigaworks big dac
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
Thread Tools Search this Thread
Old 15th May 2011, 09:23 AM   #1
overdrive69 is offline overdrive69
diyAudio Member
Join Date: Dec 2009
Default cs4398 blown gigaworks big dac

Hi all

recently fitted monacor lt110's to my dac, since doing this it hasn't been right. initially it worked fine and sounded stunning then it started breaking up on one channel once the dac warmed up. I have now disconnected the transformers and gone back to op amps and still have the same problem but its got worse. One channel works fine for say 4-5 minutes the other channel is lower in volume and lacks bottom end. once the dac warms up it starts to distort and break down on both channels eventually it stops working. I feel it could be the cs4398 that is blown as the signal getting to the chip is fine. ohm readings off the outputs on the chip are different, one is 180ish and the other is 250 ish, to me this explains the lack of volume on one channel and indicates a short in the chip. It also explains why there is earth hum on the channel that is faulty..

Anyone got any idea's or answers ?
  Reply With Quote
Old 15th May 2011, 11:47 AM   #2
Bill Fuss is offline Bill Fuss  United States
Join Date: Oct 2005
Location: Central Florida
I don't have direct answers but I'll try to help. I'm assuming you have a scope if you verified the I2S signal is getting to the chip. If you are using upsampling you can try removing it and jumpering the header.

I'm not familiar with the Monacors but if they have a primary center tap and you connected it to the board ground that would most likely be the kiss of death for the 4398 dac chip. A trafo across the output pins should not hurt it.

The boards are so damned fragile it's very easy to damage them when modding. Definately look for board damage.

I successfully replaced a damaged 4398 so it's possible to do. It was not mine so I don't know how it was damaged in the first place. I also assume that you checked the voltage at the supply pins.
  Reply With Quote


cs4398 blown gigaworks big dacHide 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
Gigaworks Dac popping and sparking! jordyyy Digital Line Level 3 1st April 2011 02:13 PM
Ebay dac with: DAC TDA1541, AD1865, AD1955, PCM63, & CS4398! sharpi31 Digital Line Level 2 10th January 2011 07:03 AM
DAC DIR9001+TDA1541A / Gigaworks Crystal DAC Bengali Digital Line Level 0 28th May 2010 08:11 PM
Gigaworks DAC R-core Wiring? kmbois Digital Line Level 6 6th May 2010 12:24 AM
DAC using CS8416 and CS4398 binspaul Digital Source 1 29th September 2009 11:37 AM

New To Site? Need Help?

All times are GMT. The time now is 05:08 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio