Buffalo DAC (ESS Sabre 9008)

[grimberg]

Do you have a TOSLINK module to send also?

[chobint]

So the VA on the buffalo is drawing .66 amps and the VA wont go over 1.0V. I don't know what's wrong. edit: ya my long shot guess was wrong. The LCDPS works fine without load. The VD side is holding fine at 6.0V with the buffalo attached. I've tried switching sides with similar effect. I have to assume that something crazy is going on in the buffalo to make it draw that much current.

[Russ White]

Originally posted by chobint
So the VA on the buffalo is drawing .66 amps and the VA wont go over 1.0V. I don't know what's wrong. edit: ya my long shot guess was wrong. The LCDPS works fine without load. The VD side is holding fine at 6.0V with the buffalo attached. I've tried switching sides with similar effect. I have to assume that something crazy is going on in the buffalo to make it draw that much current.

Is this with an IVY connected?

How does it behave when on its own?

I would also check for shorts around the AVCC opamp.

[chobint]

IVY is not conneced, my first wild guess was that the IVY was shorting the ouput on the buffalo so i disconnected it last night

[Russ White]

Originally posted by chobint
IVY is not conneced, my first wild guess was that the IVY was shorting the ouput on the buffalo so i disconnected it last night

Ok, its probably best to post some pics and such on our support forum, so we don't add debugging noise to the thread.

Also check the orientation of the AVCC opamp.

Cheers!
Russ

[chobint]

closer inspection has potentially revealed a small solder bridge on IC1, looking further at opamp config

edit: opamp config looks fine. my camera will never capture this detail (cell phone) but the solder bridge looks to be between pins 2-3 and 4-5 from the bottom, on the left side of the chip if you are reading the text on it right side up. I have thoroughly blow/vaccuumed the boards to ensure no metal dust/fragments were on the loose, still hasnt helped. I'm not confident in this diagnosis however, since the buffalo's were all tested and solder bridges don't just jump out of the air. thanks

[chobint]

ok, well me and my soldering braid have apparently fixed the problem, but again the diagnosis does not seem logical

[chobint]

okay, update again. The initial solder bridge problem has been fixed. The voltages seem fine now, the lock and automute lights work, but no sound. DIP's are low medium low medium

[kstlfido]

chobint-

plse take this matter to the twisted pear support forum!

[Russ White]

Originally posted by chobint
okay, update again. The initial solder bridge problem has been fixed. The voltages seem fine now, the lock and automute lights work, but no sound. DIP's are low medium low medium

Are you using SPDIF input?

If so try setting all of the tri-state switches high(+).

Very sorry about the solder bridge, I think you must have got a board that Brian had to stencil manually and forgot to test before it went out. I am very sorry for the trouble.

Cheers!
Russ