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Old 23rd January 2007, 05:08 AM   #21
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Join Date: May 2003
Location: SouthEastern Manitoba
3 Years! My follow-up is lacking.

Yes, I did manage to tap the circuitry to make a pre-out on my SA-GX505 receiver. The following links were very helpful in figuring it all out:

Commentary on why the SVI 3206 eventually fails in this receiver:
http://www.diyaudio.com/forums/showthread/t-25436.html

SVI 3206 pinout, linked from the above page:
http://www.geocities.com/technicshifi/SVI3206.jpg

The site where the pinout diagram originated:
http://www.welcome.to/technics

And here is my handiwork:
http://www.colp.ca/projects_technicspreamp.html

The connection is very simple. I first removed the SVI 3206 module. After confirming that pins 13 and 15 were the right pins, I wired some RCA jacks to the spots where input pins 13 & 15 go. I hooked my grounds to jumper J609, which is signal ground, conveniently located just forward of the SVI module pins.

This receiver and my gainclone amp make a good pair.
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Old 11th November 2007, 07:50 AM   #22
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Join Date: Jan 2007
Location: Wisconsin
And 9 mos later after a Divoce im back on the project...... Thank you for the infomation. This will be the last post on this one Ill let it die .... Just wanted to say thanks it been very helpful
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Old 11th November 2007, 12:55 PM   #23
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Join Date: Mar 2004
Location: Arkansas
EDIT : OOOPS... I didn't notice this is such and old thread. I HATE THAT!!!



I see you've already acquired your heatsinks, but as a fellow
bargain hunter, I found a pretty nice deal on ebay that you
might want to consider. You know, for future projects and such.

Aluminum Heat Sink 3 13/16" x 2 3/4" x 1"
Buy-it-now price : US $1.00
Quantity available : 100
Item location : Oxford, Alabama, United States
Ships to : Worldwide

Click the image to open in full size.

I'm not affiliated in any way with this vendor, but I have purchased
these heatsinks from him before. The quality is excellent, and
for this price it's too good a bargain to pass up.
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Old 15th June 2015, 08:31 AM   #24
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Join Date: Jun 2015
Default SVI module substitution??

Hi there newbie here, I'm in the process of substituting an SVI3204 in a not too dissimilar Technics SU-X502 I have found a nice little pre assembled Toshiba TT1943/TT5200 amp module that suits the existing Power supply in the technics but I'm having difficulty finding the input signal ground I have tried using pin 14 from where the old SVI sat but find it extremely noisy can anybody help point me to the actual correct area or possibly pin I should use as finding any info on these SVI modules is difficult.
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Old 15th June 2015, 06:49 PM   #25
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Join Date: Jun 2015
Hi there I note in your pictures you soldered your signal ground to that jumper can I ask what pin of the SVI 3206 that jumper connects to??
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Old 17th June 2015, 05:19 AM   #26
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Join Date: May 2003
Location: SouthEastern Manitoba
Hey Mostyn, my Technics receiver has been retired for quite a while now so it isn't handy to take a look at, but try pin 11. The pinout diagram says it's a ground too.

Click the image to open in full size.

Cheers!
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Old 17th June 2015, 07:14 AM   #27
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Join Date: Jun 2015
Hi technogeek many thanks for your reply, I'm thinking both pin 11 and 14 are just both normal chassis ground looking again at this diagram I see pin 9 has a 6v 33uf capacitor to ground and also pin 17 has a 35v 47uf capacitor to ground I presume some sort of decoupling, there must be a separate signal ground, I will try these two and see if any less hum is produced thanks again.
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