Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login
Issue Placid BP, one power rail went out
Options
View
Go to last post Go to first unread
Previous Topic Next Topic
noviygera  
#1 Posted : Monday, January 19, 2015 5:18:59 AM(UTC)
noviygera

Rank: Member

Groups: Member
Joined: 7/8/2010(UTC)
Posts: 19
United States

Was thanked: 1 time(s) in 1 post(s)
Hi,

As I was listening to music, one of my Placid BP power rails went out. There was a slight burning smell, although nothing blew up or looks fried. So I have my +17v but -17v is now at -2.4v. Now, as I power it up, only one side of heat sinks is warm.

Where should I start to troubleshoot?

thanks for any help.

Herman
Back to top

Wanna join the discussion?! Login to your Twisted Pear Audio Support forum accountor Register a new forum account.
Back to top  
miero  
#2 Posted : Monday, January 19, 2015 12:39:05 PM(UTC)
miero

Rank: Member

Groups: Member
Joined: 10/22/2011(UTC)
Posts: 135
Location: Prague

Thanks: 1 times
Was thanked: 3 time(s) in 3 post(s)
Which Placid version?

If it is Placid HD BP 2.1, then check this
http://twistedpearaudio....ge--2-8V-at-startup.aspx
Back to top
noviygera  
#3 Posted : Monday, January 19, 2015 5:50:53 PM(UTC)
noviygera

Rank: Member

Groups: Member
Joined: 7/8/2010(UTC)
Posts: 19
United States

Was thanked: 1 time(s) in 1 post(s)
It is version 2.1

I think something actually burned out because this happened shortly after I switched over to a bigger transformer (same output voltage).

I was listening to music, the Placid was getting pretty warm, not super hot. Then one rail went out. Maybe I was shunting too much current...

Which parts burn out in this case, how to I check them?

thanks,
Herman
Back to top
Russ White  
#4 Posted : Tuesday, January 20, 2015 1:10:45 AM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Parts I would suspect first:

QP2/QN4

QP1/QN3

If you replace things make sure to change R8(A and B) to 200-221R
Back to top
WWW
noviygera  
#5 Posted : Thursday, January 22, 2015 5:36:42 AM(UTC)
noviygera

Rank: Member

Groups: Member
Joined: 7/8/2010(UTC)
Posts: 19
United States

Was thanked: 1 time(s) in 1 post(s)
Thank you. Will do that and let you know if it solves the problem.
Herman
Back to top
Rss Feed  Atom Feed
Users browsing this topic
GuestUser
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Youtube
Copyright © Twisted Pear Audio