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Buffalo DAC 3 SE is not working - added the signal waveform.
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syskwl  
#1 Posted : Monday, April 15, 2013 8:31:16 AM(UTC)
syskwl

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I purchased Buffalo III SE and Ragato I/V and connected Combo384.
It is not working and it displayed A_MUTE LED as the attached photo.
I attached the photos that D2 input signal waveform because it is too
small compared to another input signal.

[img]http://blog.naver.com/syskwl/90171271615[/img]
;
I setup my friend's Buffalo III SE on the Ragato and confirm it worked well.



I guess IC5 is broken that is connected to D2 input signal, right?
What is IC5?
Can I change the IC?

Edited by user Monday, April 15, 2013 8:47:28 AM(UTC)  | Reason: didn't post photos
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Brian Donegan  
#2 Posted : Monday, April 15, 2013 9:57:59 AM(UTC)
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Can you disconnect the wire from D2 and measure its output level while not connected to the Buffalo?
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syskwl  
#3 Posted : Tuesday, April 16, 2013 3:23:27 AM(UTC)
syskwl

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Please see my blog photos. I don't know how to upload my photos to this site.
Combo384 D2 signal is normal and I checked it was connected with Buffalo DAC correctly.
As I told, I confirmed another Buffalo DAC is OK in my system.
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Brian Donegan  
#4 Posted : Tuesday, April 16, 2013 2:29:07 PM(UTC)
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Can you measure resistance to GND for each I2S input pin? This will need to be done without the USB module attached.
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syskwl  
#5 Posted : Wednesday, April 17, 2013 6:08:03 AM(UTC)
syskwl

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You're right. I measured the resistance to GND for the D2 signal connector. It is 20ohm and another normal signal is infinity.
What is IC5? I can't see the name of the IC5 because of too small. I confirmed there is short between 1 leg and 2 leg of IC5.
Where is the schematic diagram of Buffalo III SE? I can't find it here.
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