Audio Alchemy DAC-in-the-Box Repair - diyAudio
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Old 2nd April 2004, 03:47 AM   #1
dtm1962 is offline dtm1962  Canada
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Join Date: Apr 2003
Location: Sarnia, Ontario, Canada
Default Audio Alchemy DAC-in-the-Box Repair

Audio Alchemy DAC-in-the-Box Repair - Questions on my Voltage Measurements- Has my Digital Filter Failed?

Pending Post by dtm1962 (A) on April 01, 2004 at 20:42:16

I am repairing my Audio Alchemy Dac-in the Box and I have +3 VDC at both outputs. I have the following measurements:
At output of OP275 opamp - Pin 1 : 3VDC Right
Pin 7 : 3VDC Left

At output of AD1864 Dac - Pin 10 (DR) -3VDC
Pin 15 (DL) -3VDC

At output of Yamaha YM3434 Dig. Filter - Pin 10 (DRO) +5VDC
- Pin 9 (DLO) +5VDC

All of the analog & digital +/-5VDC are correct at all of the above
power supply pins where applicable. And all grounds measure 0V

The input Signal indication LED is lit when there ia a digital source
and will go out if I disconnect/turn off the CD Transport.

Question: Has the Yamaha Digital Filter YM3434 failed?

Thanks in advance.

Dan
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