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

Notification

Icon
Error

Login
BIII + Legato
Options
View
Go to last post Go to first unread
Previous Topic Next Topic
felipe  
#1 Posted : Monday, December 19, 2011 12:14:34 PM(UTC)
felipe

Rank: Member

Groups: Member
Joined: 12/6/2009(UTC)
Posts: 323
Location: Catalonia new Europe state

Thanks: 4 times
Was thanked: 1 time(s) in 1 post(s)
Connecting my new BIII with my Legato with output caps, I measured AVCC (on the Buffalo, at the output of the AVCC module) +3,4VDC, I adjusted VR1 and VR2 on the Legato until each of the inputs sit as close to AVCC/2 as possible, Right channel perfect now 1.69VDC but Left channel always -0,71V both Legato inputs (hot + cold), could you help me?

N.B. BIII OK 5.25V 500mA, Tridents OK two 3.3V & one 1.2V, AVCC OK 3.4V

Edited by user Monday, December 19, 2011 12:25:32 PM(UTC)  | Reason: Not specified
Back to top

Wanna join the discussion?! Login to your Twisted Pear Audio Support forum accountor Register a new forum account.
Back to top  
Russ White  
#2 Posted : Monday, December 19, 2011 4:53:40 PM(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)
Sound like a possible issue (soldering or dead part) on the left channel. Can you post pictures?
Back to top
WWW
felipe  
#3 Posted : Thursday, December 22, 2011 4:18:16 AM(UTC)
felipe

Rank: Member

Groups: Member
Joined: 12/6/2009(UTC)
Posts: 323
Location: Catalonia new Europe state

Thanks: 4 times
Was thanked: 1 time(s) in 1 post(s)
UserPostedImage
Back to top
felipe  
#4 Posted : Thursday, December 22, 2011 5:51:35 AM(UTC)
felipe

Rank: Member

Groups: Member
Joined: 12/6/2009(UTC)
Posts: 323
Location: Catalonia new Europe state

Thanks: 4 times
Was thanked: 1 time(s) in 1 post(s)
To avoid a cold joint solder I resoldered again all left channel and issue not fixed.
Back to top
felipe  
#5 Posted : Thursday, December 22, 2011 8:25:43 AM(UTC)
felipe

Rank: Member

Groups: Member
Joined: 12/6/2009(UTC)
Posts: 323
Location: Catalonia new Europe state

Thanks: 4 times
Was thanked: 1 time(s) in 1 post(s)
Just ordered one new Legato without output caps and without output buffers, if possible could you send me a new set of transistor to fix the issue of my old Legato?
Back to top
Brian Donegan  
#6 Posted : Thursday, December 22, 2011 8:28:01 AM(UTC)
Brian Donegan

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA

Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
How did you determine the problem was transistors?
Back to top
WWW
felipe  
#7 Posted : Thursday, December 22, 2011 9:26:10 AM(UTC)
felipe

Rank: Member

Groups: Member
Joined: 12/6/2009(UTC)
Posts: 323
Location: Catalonia new Europe state

Thanks: 4 times
Was thanked: 1 time(s) in 1 post(s)
I don't see any resistor or capacitor damaged so I suspect of transistors.
Back to top
Rss Feed  Atom Feed
Users browsing this topic
GuestUser
Similar Topics
BIII + Legato Measurements (Buffalo DAC)
by luismc 4/6/2013 5:50:56 PM(UTC)
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