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Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

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Old 13th February 2010, 05:28 PM   #14151
RCruz is offline RCruz  Switzerland
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Yes... look at the tracks... I had similar problems with those and was forced to reconstruct the pcb with the diodes legs
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Old 13th February 2010, 06:41 PM   #14152
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Diode Legs are hard and too big for this (imho).. maybe it is better to use a bare copper wire, like cat 5, f.e. so you should make easy rings istead the lost pads, or point to point wiring where are broken tracks gaps.
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Old 13th February 2010, 09:57 PM   #14153
UV101 is offline UV101  England
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Originally Posted by reddish75 View Post
its only registering mv after the diodes, the diodes are ok as is swapped them for new ones even though they tested ok.

thanks
If you have AC in, you should have DC out unless the diodes are knackered!!!!


Get yourself a copy of the service manual (plenty of links here).

Are you 100% sure the diodes are in the right way round??? What type are they?
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Old 15th February 2010, 07:26 AM   #14154
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I would defo check the tracks around the diodes as the pcb in this area is terrible quality.

Brent
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Old 16th February 2010, 12:55 PM   #14155
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Originally Posted by 6h5c View Post
Hi guys,

I got an e-mail a while ago from someone who added a Complementary Feedback Pair (a what???) to the DOS. This is a very interesting upgrade for the DOS, but i've lost his e-mail address. I think it was a Steve, but i'm not sure. Could you contact me? I've done some simulations that i'd like to share.

BTW, I have new DOS and Flea boards in, for those who are interested. My website has (finally) moved to it's own domain, so please update your bookmarks.

Ray
Hi

I am Interested at DOS using with cs4397
Is It better than original output stage at SA8400
what about that http://members.quicknet.nl/ra.vdstee...ancer_evo3.pdf
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Old 16th February 2010, 05:27 PM   #14156
6h5c is offline 6h5c  Netherlands
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Yes, it is! And i'm not just saying that because i'm selling the boards :-)
You can replace the entire three-stage analog filter of that player, including the HDAM circuit. The sound will really open up with the DOS.

The SACD Enhancer in the PDF is the original circuit by UltrAnalog the DOS is based on. But the DOS also has a third-order passive filter on-board with the same characteristic of the original Marantz filter.

Regards,

Ray
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Old 16th February 2010, 05:37 PM   #14157
UV101 is offline UV101  England
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Rays DOS is awesome! I've got a set and I've tried them in several players. The difference over any standard set up is massive. Definately more than worth while upgrade. I'm sure there are plent here who will agree
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Old 16th February 2010, 05:49 PM   #14158
6h5c is offline 6h5c  Netherlands
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I was being modest...
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Old 16th February 2010, 06:54 PM   #14159
RCruz is offline RCruz  Switzerland
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Those boards look wonderfull.... next time I need a DOS I will surely use those !

The DOS by itself is the major improvement in my CDP
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Old 16th February 2010, 11:05 PM   #14160
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Originally Posted by 6h5c View Post
I was being modest...
Credit where credit is due Ray! Although mine were not pruchased from you, I know its your circuit. When I'm ready for a 2nd set of boards, I'll be coming to you!!!
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