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

Notification

Icon
Error

Login


2 Pages<12
Options
View
Go to last post Go to first unread
breweryfr  
#21 Posted : Friday, April 8, 2011 3:25:42 AM(UTC)
breweryfr

Rank: Member

Groups: Member
Joined: 2/10/2011(UTC)
Posts: 22
Location: France

Good news, finally I got very nice sound.

But adjusting VR1 and VR2 has not effect on the + and – inputs. I have approximately 0VDC.
With DAC it's still 0VDC.
I measured on board the POT VR1=480 Ohms and VR2=460 Ohms.

Edited by user Saturday, April 9, 2011 2:59:17 AM(UTC)  | Reason: Not specified

ihear21khz  
#22 Posted : Monday, April 11, 2011 8:28:16 PM(UTC)
ihear21khz

Rank: Member

Groups: Member
Joined: 7/27/2010(UTC)
Posts: 48
Location: Malaysia

Was thanked: 1 time(s) in 1 post(s)
breweryfr wrote:
Good news, finally I got very nice sound.

But adjusting VR1 and VR2 has not effect on the + and – inputs. I have approximately 0VDC.
With DAC it's still 0VDC.
I measured on board the POT VR1=480 Ohms and VR2=460 Ohms.


OK so tell us what was wrong.

Are your adjustments to VR1 and VR2 part of the final adjustments in relation to AVCCC/2 as listed in the manual? If it is, then you are fine.
breweryfr  
#23 Posted : Tuesday, April 12, 2011 12:33:14 AM(UTC)
breweryfr

Rank: Member

Groups: Member
Joined: 2/10/2011(UTC)
Posts: 22
Location: France

I had to solder joins again as you mentioned on the previsous post.

I first started to listen the output of the DAC and then the Balanced output of the LEGATO.
And finally with the SE output.

But when the DAC is not connected to the LEGATO the inputs signal level is around 0VDC.
When DAC connected the level is still at 0VDC.

"Are your adjustments to VR1 and VR2 part of the final adjustments in relation to AVCCC/2 as listed in the manual? "
No that's the problem AVCC measured is 3,3VDC.
ihear21khz  
#24 Posted : Tuesday, April 12, 2011 8:25:54 PM(UTC)
ihear21khz

Rank: Member

Groups: Member
Joined: 7/27/2010(UTC)
Posts: 48
Location: Malaysia

Was thanked: 1 time(s) in 1 post(s)
IIRC, I too could not get my setting to exactly 1/2 AVCC. Also note that the voltage changes very slowly when you adjust the VRs. Make a small adjustment and wait. If you turn the VR stop to stop quickly, it can appear that nothing happens.
breweryfr  
#25 Posted : Wednesday, April 13, 2011 8:09:16 AM(UTC)
breweryfr

Rank: Member

Groups: Member
Joined: 2/10/2011(UTC)
Posts: 22
Location: France

ok I'll try it.
Rss Feed  Atom Feed
Users browsing this topic
GuestUser (12)
2 Pages<12
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.