Lepai T-Amp with TA2020 - Page 63 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 11th September 2010, 03:43 PM   #621
denztan is offline denztan  Philippines
diyAudio Member
 
Join Date: Aug 2010
Thanks MikeHunt79!!

I'll do it as soon as i got my new Amp.. i just hope that it'll last longer
  Reply With Quote
Old 12th September 2010, 01:56 PM   #622
msj965 is offline msj965  United States
diyAudio Member
 
Join Date: Feb 2009
Quote:
Originally Posted by denztan View Post
Thanks MikeHunt79!!

I'll do it as soon as i got my new Amp.. i just hope that it'll last longer
Kamusta paniero meron din akong lepai eh kaya nga lang nagluko.anyway balitaan mo nalang ako ng iyong amp.
  Reply With Quote
Old 14th September 2010, 03:29 PM   #623
amuppet is offline amuppet  United Kingdom
diyAudio Member
 
Join Date: Sep 2010
Hi all. I am, as the name indicates, a total muppet. Please forgive the unforgivable idiocy I'm about to describe. It will horrify you that such morons exist.

I plugged a 12V "AC adaptor" cable from an old Creative speaker system into a newly delivered Lepai LP-2020. The brick on the cable reads: PRI. : 230V~50Hz 320 mA; SEC. : 12V ~ 4.2A. The unit then started smoking, quite badly, and still stinks, several hours later. I am for now assuming I pumped AC into a DC-requiring input, and fried at least one if not more of the components

I have opened the case up to look for damage. So far the only visible damage I can see is to a small cylindrical (pointing up) brown component (that narrows in the middle, like a tall Oreo) nearest to the power input, standing on two 'legs'. It has no markings but the board has '5401' written near by.

I would really appreciate someone detailing my options here... how do I investigate / fix what's wrong?

Happy to post pictures if it helps.
  Reply With Quote
Old 14th September 2010, 03:32 PM   #624
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Definitely post a good photo of the part in question, and of that area.
  Reply With Quote
Old 14th September 2010, 03:43 PM   #625
denztan is offline denztan  Philippines
diyAudio Member
 
Join Date: Aug 2010
Guys, i have received my new amp as i upgrade the resistors it's giving me a dc offset of 95mv for the right channela and 12volts on the right channel!!! what would cause this to happen? bad capacitor? bad resistor? also i have another 1 that humms as soon as i turn on the amp.. amy help will be much appreciated.

Msj965,
Wassup!?!?! i'll update you if i have any progress w/ the upgrades. i'll have the LM4562 coming in soon
  Reply With Quote
Old 14th September 2010, 03:59 PM   #626
amuppet is offline amuppet  United Kingdom
diyAudio Member
 
Join Date: Sep 2010
Happy to oblige - cheers for the speedy reply.
Attached Images
File Type: jpg P1010459.JPG (219.6 KB, 645 views)
File Type: jpg P1010458.JPG (297.6 KB, 624 views)
  Reply With Quote
Old 14th September 2010, 04:16 PM   #627
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
I think it's an inductor. Probably a 10uH?

Last edited by iko; 14th September 2010 at 04:20 PM. Reason: typo
  Reply With Quote
Old 14th September 2010, 04:23 PM   #628
iko is offline iko  Canada
diyAudio Moderator
 
iko's Avatar
 
Join Date: May 2008
Location: Toronto
Have a look at this schematic

Lepai T-Amp with TA2020

You might want to check all the components shown in the lower left corner, T1 and T2, the zener D1, etc.
  Reply With Quote
Old 15th September 2010, 02:06 PM   #629
denztan is offline denztan  Philippines
diyAudio Member
 
Join Date: Aug 2010
Thanks for helping me figure it out... will try to change the inductors hopefully it'll fix the prob.

ikoflexer, thanks for the link
  Reply With Quote
Old 16th September 2010, 07:34 AM   #630
amuppet is offline amuppet  United Kingdom
diyAudio Member
 
Join Date: Sep 2010
hi ikoflexer - who were you replying to in your most recent replies?
  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
New ta2020 pcb'S ArjenShenzhen Vendor's Bazaar 98 14th November 2012 11:39 AM
Ta2020 Bengali Class D 0 29th September 2007 05:28 AM
Eb-ta2020 opentop Class D 16 30th May 2005 07:42 AM


New To Site? Need Help?

All times are GMT. The time now is 03:52 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