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 12th September 2011, 04:32 AM   #1
diyAudio Member
 
Join Date: Feb 2010
Default Novice DAC Repair help

Hi, so I'm pretty new to this whole diy thing and I need help identifying a part to be replaced. I started working on a Perpetual Technologies P-3A DAC to replace a few parts. I've identified a part that needs to be replaced, I just don't know what type of part it is (I'm really new to this subject) or where I can order it. I was hoping one of you could let me know what part this is. Maybe you could even tell me what part number it was. Any help would be greatly appreciated.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 12th September 2011, 05:25 AM   #2
diyAudio Member
 
Greg Erskine's Avatar
 
Join Date: Jan 2002
Location: Sydney/Australia
C = capacitor
__________________
Greg Erskine
  Reply With Quote
Old 12th September 2011, 08:17 AM   #3
jonners is offline jonners  United Kingdom
diyAudio Member
 
jonners's Avatar
 
Join Date: Jan 2007
Location: Cheltenham
How do you know that part needs replacing when you didn't know (until just now) what it was?
  Reply With Quote
Old 13th September 2011, 08:08 AM   #4
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
probably the slight scorch marks visible are some clue =) its difficult, yes indeed its a capacitor, but if its fried he cannot measure its value (if he indeed has a multimeter), although good chance its the same as the other caps surrounding it. without knowing the value its hard, its likely to be 10-100nf np0/c0g or x7r type 0805 size ceramic. np0, c0g and x7r are grades, not brands, the brand will be univportant, so if we can find the value it will be easy to find one at farnell, digikey, mouser, newark etc

Last edited by qusp; 13th September 2011 at 08:13 AM.
  Reply With Quote
Old 13th September 2011, 03:12 PM   #5
diyAudio Member
 
tamphist's Avatar
 
Join Date: Dec 2010
Looks like it's just a bypass cap.
It is not that important part.
Your DAC should work even with that part missing.


Don't pay too much. Buy 50 pcs of them from here:
http://www.ebay.com/itm/50pcs-SMD-C0...#ht_865wt_1033
Or 100pcs from here:
http://www.ebay.com/itm/100-SMD-Capa...ht_3209wt_1186

Last edited by tamphist; 13th September 2011 at 03:15 PM.
  Reply With Quote
Old 13th September 2011, 05:38 PM   #6
diyAudio Member
 
firechief's Avatar
 
Join Date: Sep 2008
Location: Near Seattle Wa
Does the DAC work? If you are "moding" this unit you really really need a schematic first. The comments so far are well made, you might be able to just ignore the cap or replace it with a common bypass cap value like .01 ufd, but wouldnt it be smarter to know? Did you install that yellow radial cap hung out in the air like that? Did you short something out in the process? I suppose that I sound a bit critical, but you are asking for answers without offering enough information.
__________________
"You can keep your insurance baby nothing is guaranteed" -Tom Petty
  Reply With Quote
Old 15th September 2011, 06:41 AM   #7
diyAudio Member
 
Join Date: Feb 2010
Thanks for all the replies, guys. I was trying to replace the power jack, which had been broken and I noticed the scorch marks. This dac had been bought used and I didnt know if I had done the damage or if the damage had been there before I bought it. I can test the board with a multimeter, but I cannot verify that it works since I desoldered the jack so I could replace it. Also, I did not install the radial cap. My goal was to replace the jack and I was concerned about the scorch marks. Anyways, I will try to replace the jack and if the dac works, then I will leave it alone. I think I will try to do as little damage as possible as I learn how to work with electronics.
  Reply With Quote
Old 15th September 2011, 06:54 AM   #8
diyAudio Member
 
Join Date: Feb 2010
If I wanted to measure the surrounding caps, what setting would I have to set the DMM at?
  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
Repair of Pink Triangle Da Capo DAC William C Digital Source 17 11th January 2010 09:43 AM
Could anyone help a novice? sunnycue Full Range 8 4th August 2006 05:45 AM
DAC question from a novice fishwinker Digital Source 6 17th June 2006 07:41 AM
Novice in need of help skiermurph Solid State 2 22nd December 2004 01:52 AM
Audio Alchemy DAC-in-the-Box Repair dtm1962 Digital Source 0 2nd April 2004 03:47 AM


New To Site? Need Help?

All times are GMT. The time now is 09:11 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