Go Back   Home > Forums > Amplifiers > Power Supplies

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 29th November 2011, 08:01 PM   #1
Rarkov is offline Rarkov  England
diyAudio Member
 
Rarkov's Avatar
 
Join Date: Aug 2002
Location: North East, UK
Send a message via ICQ to Rarkov Send a message via Skype™ to Rarkov
Default Faulty Connexelectronic SMPS2000R [Resolved]

Hi all,
I ordered two SMPS2000R power supplies to power my Tripath TA0105A amps. One works OK but the other was dead on arrival. I have tried everything to get help from Cristi, but to no avail. I've even recorded videos of my attempts to debug the circuit and posted it on YouTube. Cristi tells me that video sites are blocked where he comes from, so I hosted the video on my site. Apparently that didn't work either...so I cut the video into 5 and emailed them, but that didn't work either...

Next was Skype - but you both have to be on at the same time for that to work...now all attempts to communicate via email have gone unanswered.

Two questions:
  1. Has anyone else had this problem with Connexelectronic?
  2. Any ideas how to debug the SMPS2000R?!

Thanks!
Gareth
  Reply With Quote
Old 29th November 2011, 08:15 PM   #2
norazmi is offline norazmi  Malaysia
diyAudio Member
 
Join Date: Feb 2008
Good information, have u try ask him with cristi sales thread at marketplace? maybe u can get some information there, btw i dont have any idea about smps2000r, it cost more than $100 i think..
  Reply With Quote
Old 29th November 2011, 08:32 PM   #3
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
what have you checked on it?
where are the vids?
is pretty simple circuit, switching supplys
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 29th November 2011, 09:30 PM   #4
Rarkov is offline Rarkov  England
diyAudio Member
 
Rarkov's Avatar
 
Join Date: Aug 2002
Location: North East, UK
Send a message via ICQ to Rarkov Send a message via Skype™ to Rarkov
Video here: Testing the Connex Electronic SMPS2000R - YouTube

This is what's happening:
  1. Checked all fuses on board with continuity meter - all fine.
  2. Connected the board to the mains (240V) using the Live, Neutral and Earth wires with 13amp fuse.
  3. Turned on power from mains and POWER LED turned on
  4. Measured +ve rail to GND: 0V
  5. Measured -ve rail to GND: 0V
  6. Measured +ve AUX to AUX GND: 0V
  7. Measured -ve AUX to AUX GND: 0V

I was asked to check pads 1, 2 and 3 from the attachment which measured as follows:
  1. 2.7V
  2. 10.56V
  3. 12.57V

Apparently, they should have measured:
  1. 12.5 - 15V
  2. 11 - 13.5V
  3. 16 - 22V

Thanks for any help!!!
Gareth
Attached Images
File Type: gif SMPS2000R Debug.GIF (185.9 KB, 535 views)
  Reply With Quote
Old 29th November 2011, 10:40 PM   #5
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
I don't know what those are, but check if IC has power, if its oscillator is working, if it is outputting anything on its output and so on
Led could be just to indicate that main capacitors are charged... nothing important

Do you have scope?
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 29th November 2011, 10:51 PM   #6
Rarkov is offline Rarkov  England
diyAudio Member
 
Rarkov's Avatar
 
Join Date: Aug 2002
Location: North East, UK
Send a message via ICQ to Rarkov Send a message via Skype™ to Rarkov
Thanks luka,
I have a scope, but its been a good few years since I've used it! I'll have to dust off my memory! I'll check the board tomorrow and find out what the IC is and grab the datasheet.

Again, thanks for your help!
Gareth
  Reply With Quote
Old 2nd December 2011, 11:09 AM   #7
Banned
 
Join Date: Sep 2011
I was looking to buy the 500W version of that SMPS. will I face same issues?
  Reply With Quote
Old 2nd December 2011, 06:36 PM   #8
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
its still unknown what is wrong
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 3rd December 2011, 01:19 AM   #9
! is offline !  United States
diyAudio Member
 
Join Date: Jun 2005
Location: Midwest
Basically you just use the multimeter to trace the circuit, the path the current flows from input to output to see where the values aren't right anymore.

There seems to be a typical line filter, then at bridge rectifier input you should still have near 240VAC, then on the output you'd have about 335V DC, then tracing over to one or more switching transistors you'd have their base driven by the control circuit, and an emitter and collector voltage levels (or mosfet gate, drain and source pins). If no voltage is coming out of the transistors and they are driven at their base still, suspect transistor fault. If there is no base drive, begin tracing the control circuit. Locate the control IC and its datasheet or make a schematic of a discrete design to better understand what to measure in it.

If on the other hand you still have a good voltage level going into the transformer, measure at the transformer output (secondary) windings too.

It helps that you have one that works ok because you can compare readings between the two. Just be careful, playing with line powered power supplies is potentially dangerous. Some would advise hooking this up with a light bulb in series on the AC input to limit current.

Last edited by !; 3rd December 2011 at 01:22 AM.
  Reply With Quote
Old 3rd December 2011, 05:57 PM   #10
Banned
 
Join Date: Sep 2011
I think you should ask for a return of this power supply, if its faulty already

A schematic will help you to fix it also.
  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
Connexelectronic vs zoe_tsang amps Frosteh Class D 6 2nd February 2012 06:46 AM
TMC or TPC my dilemma resolved? dadod Solid State 23 2nd May 2011 08:23 AM
denom pma250 amp faulty,but no faulty parts found please help homertooties Solid State 1 7th December 2008 03:58 PM


New To Site? Need Help?

All times are GMT. The time now is 08:35 PM.


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