Soundstream Reference 500sx problem - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 9th February 2012, 04:14 PM   #1
azvrt is offline azvrt  Netherlands
diyAudio Member
 
Join Date: Dec 2010
Location: Netherlands
Default Soundstream Reference 500sx problem

I have a 500sx that seems to short circuit when I hook it up to the power supply, as the analogue indicator of the PS instantly maxes out at over 3 ampere, the max indication, so I quickly power it off.

I see this one has been heavily repaired in the past.

Anyway, I once had a Ref 300 and 200s which also short circuited, and on both amps replacing the rectifiers did it for me.

I can't remember what the rectifiers should read on this amp, as it's quite some time ago, but when I did the ohms test I only had 0.00 or 1 (max) on the digital multimeter, nothing else. Usually there are also other values. Many, many legs have 0.00 on them, in several directions. So maybe the rectifiers need to be replaced on this one as well ?

I noticed they are FEP16CT and FEN16CT, I have lots of BT's in stock but they are lower rated. Wonder why Jaime give me so much BT's, while most Ref s / sx amplifiers use the higher rated CT and DT ?
I have some DT's in stock I think, could use those. Or would it be safe to use the lower rated BT's ? Got so many of them...

I see the 160s and 200s use BT, but most (if not all) other models use CT or DT, and more often DT than CT. Wonder what I will ever use the BT's for ??
  Reply With Quote
Old 9th February 2012, 05:15 PM   #2
diyAudio Member
 
Join Date: Dec 2005
Location: Northern California
You can send all of your BT's to me if you like lol lol..


Most amps like SoundStream only have 20 to 35 volt rails so lower PIV rated diodes should just fine my friend

Using a 600 PIV rated diode means the engineer spec'ed the highest rated device possible in hopes of getting the best possible PN junctions off the silicon wafer, and inside the amp.
  Reply With Quote
Old 9th February 2012, 05:52 PM   #3
azvrt is offline azvrt  Netherlands
diyAudio Member
 
Join Date: Dec 2010
Location: Netherlands
Same as the IRFD9110 on the Adcom
I'll ask Jaime what he thinks but it sounds very reasonable, thanks.

But do you think there's something wrong with the rectifiers, since they only read max ohms or 0.00 ohms, and on a lot of legs 0.00 ?
  Reply With Quote
Old 9th February 2012, 06:18 PM   #4
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
In the circuit, you will read 0.000v on diode check across the outer legs because the transformer windings are connected to those legs. Although there are a few exceptions to this, most amps that use positive and negative center-tapped rectifiers connect the transformer windings to the outer two legs.
  Reply With Quote
Old 9th February 2012, 07:05 PM   #5
azvrt is offline azvrt  Netherlands
diyAudio Member
 
Join Date: Dec 2010
Location: Netherlands
Great information Perry.
I'll have to check but I think I have lots of positions on which it read 0.00 ohms.
When you're saying that I can expect to find these 0.00 readings across the outer legs, do you mean in both directions (positive - negative and negative - positive) ?
Would that imply that each rectifier would show 0.0 twice, when measuring across all legs and in both directions ? I think (but I could be wrong) I had more than twice 0.00 for each rectifier.
  Reply With Quote
Old 9th February 2012, 09:25 PM   #6
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
They will read 0.000v in both directions on diode-check.

If you read 0.000v on diode-check from the center-outside legs as well, the rectifier (or one in parallel with it) is likely shorted. The only other thing likely to make it appear that there is a shorted rectifier is shorted rail caps.
  Reply With Quote
Old 9th February 2012, 10:03 PM   #7
azvrt is offline azvrt  Netherlands
diyAudio Member
 
Join Date: Dec 2010
Location: Netherlands
I think, but I'd have to check, that I had 0.00 in at least 4 positions / directions on each rectifier.
I will simply replace the rectifiers and see what happens then.
  Reply With Quote
Old 10th February 2012, 12:11 AM   #8
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
When you remove it, re-check it.
  Reply With Quote
Old 10th February 2012, 10:50 AM   #9
azvrt is offline azvrt  Netherlands
diyAudio Member
 
Join Date: Dec 2010
Location: Netherlands
By that, you mean check them again with the ohms test, and if all four of them turn out to be good, I have to look for the problem elsewhere, right ?

If one of them is bad, I'll like have found the problem ?
  Reply With Quote
Old 11th February 2012, 07:56 AM   #10
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Yes to both.
  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
Soundstream Reference 500sx Repair sdiesel Car Audio 18 16th April 2014 01:17 AM
soundstream reference 500sx mike49504 Car Audio 18 2nd January 2010 09:00 AM
Soundstream Reference 405s problem Zreon Car Audio 15 31st March 2009 05:01 PM
Soundstream Reference 300 Problem notacop Car Audio 12 22nd February 2006 12:24 AM
soundstream reference 405 problem suprmanDL Car Audio 3 21st January 2005 08:46 PM


New To Site? Need Help?

All times are GMT. The time now is 01:55 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