Rank: Member
Groups: Member
Joined: 8/2/2021(UTC) Posts: 10  Location: Salamis
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Yesterday assembled the bal/se buffer stage, but there is not any signal output from se pins.
At first, are the relay polarity at photo o.k.?
Is it necessary to make any other connection to activate the relay sw1?
[img=https://imgur.com/a/9DMsPEY]legato[/img]
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Rank: Member
Groups: Member
Joined: 8/2/2021(UTC) Posts: 10 Location: Salamis
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Rank: Member
Groups: Member
Joined: 8/2/2021(UTC) Posts: 10 Location: Salamis
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Some clarifications:
Until yesterday, i've been using legato by balanced outputs, and the dac is Buffalo II.
On se output i measure about 20.5R resistance to gnd.
During operation, the dac lock led is on, that means dac is o.k. i suppose.
The problem focused to legato.
The power rails is at +-12volts.
If you need any other information please let me know guys, thank you.
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Rank: Member
Groups: Member
Joined: 8/2/2021(UTC) Posts: 10 Location: Salamis
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O.k. huge fault the R1-R4 omission resistors.
The single ended out now is o.k., but after a solder joints refreshment pass, i encounter another problem.
The negative out of right balanced out, give's me a distorted signal, and a noise like ground loop.
Are there any possibility to made a damage to the through hole plate by resoldering?
By your experience where i should look?
I need your assistance please.
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