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Old 12th February 2008, 02:37 PM   #1
pigoia is offline pigoia  Italy
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Default CS8414 spdif problem

Hello!
I built this mini dac http://www.jogis-roehrenbude.de/Lese...Projekt/CD.htm

But I change the spdif reciver with the CS8414.
I read many times, this is compatible with mini dac.
I've change the filter 470ohm 0.068uF (CS8412=1K 0.047uF).
When I push play no sound....
At this moment I' haven't a scope but I check the tension.

Pin 28 4.6v (I must be zero when lock spdif)
Pin 26 1.3v
Pin 11 4.6v
Pin 7,22,24 5v
Pin 14,8,21,17,18,23 GND
Any idea?
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Old 12th February 2008, 07:03 PM   #2
pigoia is offline pigoia  Italy
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I tried an old cdrom and now work!!
I check the spdif cable connected:
cdrom work 0,93v
cdrom doesn't work 0,12v
This mean anything?
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Old 14th February 2008, 11:15 AM   #3
pigoia is offline pigoia  Italy
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I solve the problem!
The digital out on the back of cdrom unit, is spdif in ttl format.
I remove R1 (75omh) in input interface, R1 in needed only with coax cable (cdplayer).

But I've an another problem....I bought 3 CS8414 on futurlec.
Only one works, possible other 2 have failure.
In the attach file not work.
Thank you.
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Old 14th February 2008, 04:40 PM   #4
kevinkr is offline kevinkr  United States
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I see what appear to be a couple of unsoldered pins on your adaptor board - pins 15 and 28 specifically, and there are probably others.
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Old 14th February 2008, 06:00 PM   #5
pigoia is offline pigoia  Italy
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This work!
Same adaptor but I see now... different code.
What is this code?
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Old 14th February 2008, 06:26 PM   #6
kevinkr is offline kevinkr  United States
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That code is the manufacturer code and should tell you where it was packaged and when. If you go the Crystal website it may tell you how to read those codes.

It really does look like some pins are not soldered properly on both of those adaptors and I would address that issue first.

Actually putting spdif receiver chips on carriers like that may not be a wonderful idea, and I bet there is no supply decoupling on that adaptor either, despite the obviously long trace lengths.
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Old 14th February 2008, 08:20 PM   #7
Archwn is offline Archwn  United Kingdom
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"guala" must be Guala lumpur capital city of Malaysia (or indonesia?)

8414 from my experience, is quite fragile. lots of them fails shortly after a while.
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Old 16th February 2008, 10:58 AM   #8
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to Kevinkr, Archwer and others


If so, could you please advice about using the CS8414 with an adaptor, for example - instead of Yamaha YM3623b? Please see the attached picture: This one is meant to do exactly this (replacing the YM3623). It is configured to 24 bit Input/Output.

Should this be OK?

Many thanks!
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Old 16th February 2008, 11:09 AM   #9
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Quote:
Originally posted by Archwn
"guala" must be Guala lumpur capital city of Malaysia (or indonesia?)



Dammit, spilled coffee all over myself. It's plain irresponsible to insert such a gem into this boring thread.
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Old 16th February 2008, 11:18 AM   #10
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Sorry about the coffee! And how about ansering the question ?
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