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GF-9494x & 8585 line in mod


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#1 Sel The Don

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Posted 27 June 2015 - 02:15 AM

Hello all, 

 

I have both of these BB's and I'd like to carry out the line in mod for them as they're way too sensitive for an AUX input.  

 

I've searched the forums but didn't find anything relating to this, does anyone have any info or diagrams that will show me what I need to do?

 

Thanks in advance.



#2 goodman

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Posted 27 June 2015 - 05:25 AM

To resolve problem with strong audio signal you need passive audio attenuator:

You can made by yourself:

passive%20tester.jpg

 

... or find in ebay or amazon:

10-105.jpg

41bGIRvxKRL._SY300_.jpg

Goodluck...



#3 Sel The Don

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Posted 29 June 2015 - 05:48 AM

Thanks for the info mate.  

 

Do you know if there's anything that I can do internally to them? 



#4 Northerner

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Posted 29 June 2015 - 07:23 AM

Here it is for a 9191 :-)

http://www.stereo2go...-quick-question

 

New link:

 

http://stereo2go.org...ck-question.htm



#5 Hisrudeness

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Posted 29 June 2015 - 01:57 PM

Could really use a couple of those Calrad attenuators but can't find a site that will ship to the UK. Can any U.S. Members help?

#6 goodman

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Posted 30 June 2015 - 01:57 AM

I have the same problem with old DVD player.
When I listen different CDs or MP3-CDs, they have different levels.

To resolve this problem I integrated one Attenuator in player.

I make hole in back panel and insert potentiometer.

Make connections just like picture 1.

 

Hisrudeness, I found for you similar on ebay.co.uk:

181787544881   141682856947

 

 

 



#7 Northerner

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Posted 30 June 2015 - 05:16 AM

I have the same problem with old DVD player.When I listen different CDs or MP3-CDs, they have different levels.To resolve this problem I integrated one Attenuator in player.I make hole in back panel and insert potentiometer.Make connections just like picture 1. Hisrudeness, I found for you similar on ebay.co.uk:181787544881   141682856947


If I make one as per the diagram above what K pot do I need? And is it linear or logarithmic? Cheers :-)

#8 goodman

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Posted 30 June 2015 - 01:00 PM

In my player I use stereo potentiometer 50 K ohms.

Linear or logarithmic? I'm not shure, but work very good...



#9 fromNKLwithlove

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Posted 20 January 2017 - 06:55 AM

I recently acquired Sharp GF-9494 and im wondering how to make the phono input to line in... :hmmm:



#10 Fatdog

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Posted 20 January 2017 - 07:54 AM

I recently acquired Sharp GF-9494 and im wondering how to make the phono input to line in... :hmmm:

The easy way would be to get an RIAA phono input to line level attenuator.  MCM Electronics used to stock these, but the item hasn't been available for a couple of years.  Member, Northerner, bought several if I remember correctly.  He might have an extra you can buy.

 

If you want to try your luck at finding one online, here's a Google link:

 

https://www.google.c...=utf-8&oe=utf-8



#11 fromNKLwithlove

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Posted 20 January 2017 - 08:31 AM

 

The easy way would be to get an RIAA phono input to line level attenuator.  MCM Electronics used to stock these, but the item hasn't been available for a couple of years.  Member, Northerner, bought several if I remember correctly.  He might have an extra you can buy.

 

If you want to try your luck at finding one online, here's a Google link:

 

https://www.google.c...=utf-8&oe=utf-8

 

Thanks! I will look into that..

 

Does anyone know any internal mods to convert phono to line in?



#12 goodman

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Posted 21 January 2017 - 03:46 AM

Yes, you can convert phono to line in:

This is original board:

Sharp_GF_9494_original.jpg

You must cut track with red lines, and wired with green:

 

Sharp_GF_9494_mod_1.jpg

 

Here is clean version, without phono preamp:

 

Sharp_GF_9494_mod_2.jpg

 

You can download service manual here:

https://www.elektrot...f/download.html

 

 

 

 

 



#13 fromNKLwithlove

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Posted 21 January 2017 - 04:49 AM

I will try that soon! Thank you a lot goodman! :thumbsup:



#14 goodman

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Posted 21 January 2017 - 05:28 AM

Please, upload picture from this mod.
A little advice from me:
It's better to de-soldering all unused electronic components from board.

Good luck.



#15 Dancorp

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Posted 05 April 2018 - 12:45 AM

Just to be certain, has anyone ever tried this internal modification on a GF 8585?

:cool: