Older Aragon/Acurus schematics

KNielsen

KNielsen

Well-Known Member
Hey AK.

Since 'Indy Audio Labs' decided to skip their legacy products on their webpage, where good information was available regarding older Mondial/Klipsch manufacturing, I thought this thread would be a good idea.
Many schematics from Aragon and Acurus is no more available, and cannot be Googled; due to the delete of legacy-files from India Audio. And it's ok they move forward, but there is a big missing link now... Hense these schematics were never uploaded to hifiengine or ect ect...

Please feel free to post your saved schematics, hopefully that'll help others save their Aragon/Acurus equipment in the future.

As a quick search via Google, the "Aragon Aurum preamplifier" can not be found pr schematic. I'll hope this thread will help relate to subject.

An uploaded picture is ok, but also PDF-file would be perfect.

Bring it on :)

Best regards
 
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I started uploading some of them to hifiengine. I have pulled a lot of schematics from there over the years so I thought that would be a good way for me to give back. The Aurum is there now...
 
mondialfan said:
I started uploading some of them to hifiengine. I have pulled a lot of schematics from there over the years so I thought that would be a good way for me to give back. The Aurum is there now...
Click to expand...
Thanks alot :)
I've been in contact with IAL, but they will only send individuelle schematics pr request. I've hoped they had a ZIP-packed or something with old Mondial-schematics hence the missing legacy-files, but no..
The service pr email was good though, and quick response.
 
Thanks @mondialfan , didn't think this one existed.
I guess Q1-9 is 2SC2240 since they used these all the time, Q11 is 2SC4793. I can't see Q10 from pictures.

There is some connections I do not understand from schematic.
-P1/P2: Speaker Input
-P3: PSU ground
-P4/P5: Relay control... But I only see connection for one relay, and not one pr board??
P6:??? It says +75V but why, isn't it powered from the secondary??
P7:???
"P8": AC in from secondary (I think)

Thanks:)
 
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KNielsen said:
Thanks @mondialfan , didn't think this one existed.
I guess Q1-9 is 2SC2240 since they used these all the time, Q11 is 2SC4793. I can't see Q10 from pictures.

There is some connections I do not understand from schematic.
-P1/P2: Speaker Input
-P3: PSU ground
-P4/P5: Relay control... But I only see connection for one relay, and not one pr board??
P6:??? It says +75V but why, isn't it powered from the secondary??
P7:???
"P8": AC in from secondary (I think)

Thanks:)
Click to expand...

This board was in the 8008x3 schematics package so it was purposed for multi-channel use. This same circuit would've been built onto each channel board on the 8002/8008 stereo amps but with a single input channel. Mondial probably built some future flexibility into this board.

P4/P5 - maybe a way to connect a single external or even alternate relays in parallel and trip them when one board detects a fault, could also be a tap to add an external or panel mounted fault LED.
P6 - Just power for the circuit, its not powered from the AC mains due to wanting to eliminate extra smoothing capacitors. You've got a good DC source available for circuit power so you might as well use that.
P7- With multiple boards in parallel you could tie P7 together and parallel them all so that only one AC tap (AC IN) would be needed.
AC IN - This is just AC loss detection to open the relay quickly in the event of a mains AC power loss.
 
mondialfan said:
This board was in the 8008x3 schematics package so it was purposed for multi-channel use. This same circuit would've been built onto each channel board on the 8002/8008 stereo amps but with a single input channel. Mondial probably built some future flexibility into this board.

P4/P5 - maybe a way to connect a single external or even alternate relays in parallel and trip them when one board detects a fault, could also be a tap to add an external or panel mounted fault LED.
P6 - Just power for the circuit, its not powered from the AC mains due to wanting to eliminate extra smoothing capacitors. You've got a good DC source available for circuit power so you might as well use that.
P7- With multiple boards in parallel you could tie P7 together and parallel them all so that only one AC tap (AC IN) would be needed.
AC IN - This is just AC loss detection to open the relay quickly in the event of a mains AC power loss.
Click to expand...
Wow thanks! Big help. I'm trying to note what's not been written into the schematics and clean-up some of the older schematics where the writing can be impossible to read, so a very big help with this one.
Looking at a Aragon 8008 relay board I googled, it looks like a smaller Rev1.x(?) over the Rev1.0 schematic posted, that's why I didn't see the direct line between the two :)
I cannot see a Q10 or AC-sense on the Rev1.x(?), but its coupled directly to the PSU as you describe
Aragon small rect. & protection boards-61.jpg
 
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mondialfan said:
I started uploading some of them to hifiengine. I have pulled a lot of schematics from there over the years so I thought that would be a good way for me to give back. The Aurum is there now...
Click to expand...

Super Thanks for your generosity --
I have an Aurum and a 47K phono pre...

Celadon
 
KNielsen said:
Wow thanks! Big help. I'm trying to note what's not been written into the schematics and clean-up some of the older schematics where the writing can be impossible to read, so a very big help with this one.
Looking at a Aragon 8008 relay board I googled, it looks like a smaller Rev1.x(?) over the Rev1.0 schematic posted, that's why I didn't see the direct line between the two :)
I cannot see a Q10 or AC-sense on the Rev1.x(?), but its coupled directly to the PSU as you describe
Click to expand...

This document has the relay board in it. Q10 is there hidden by Q11. I do not see the AC sense input either or the associated half-wave rectifier diode but the .47uF capacitor is there.
 

Attachments

mondialfan said:
This document has the relay board in it. Q10 is there hidden by Q11. I do not see the AC sense input either or the associated half-wave rectifier diode but the .47uF capacitor is there.
Click to expand...
Also a new PDF to me :) Any idea about the diodes?? 1n4148 in the relay control..??? the diode at the relay coil I set to 1N4007, but maby I'm off
 
The diode across the relay coil is to bleed off the back EMF voltage spike when the relay is turned off. I would use 1N4002 or higher voltage rated for this purpose.
 
KNielsen/MondialFan (KC)

I dug out my old hard drives that had Mondial/Klipsch technical documents, brochures etc from way back when. Included are schematics for the 4T2, IPS, IDLK, 4004 family and 8008 family schematics, as well as fuse recommendations and bias levels/adjustments for various components -- I have no idea on ownership/posting rights etc. Also files on an Ingot MkII which I believe KC designed and marketed years ago.

Thread looks to be in statsis -- do either of you want these uploaded?

Regards

BEYoung
 
BEYoung said:
KNielsen/MondialFan (KC)

I dug out my old hard drives that had Mondial/Klipsch technical documents, brochures etc from way back when. Included are schematics for the 4T2, IPS, IDLK, 4004 family and 8008 family schematics, as well as fuse recommendations and bias levels/adjustments for various components -- I have no idea on ownership/posting rights etc. Also files on an Ingot MkII which I believe KC designed and marketed years ago.

Thread looks to be in statsis -- do either of you want these uploaded?

Regards

BEYoung
Click to expand...
That would be great.
 
BEYoung said:
KNielsen/MondialFan (KC)

I dug out my old hard drives that had Mondial/Klipsch technical documents, brochures etc from way back when. Included are schematics for the 4T2, IPS, IDLK, 4004 family and 8008 family schematics, as well as fuse recommendations and bias levels/adjustments for various components -- I have no idea on ownership/posting rights etc. Also files on an Ingot MkII which I believe KC designed and marketed years ago.

Thread looks to be in statsis -- do either of you want these uploaded?

Regards

BEYoung
Click to expand...
Is it possible you would upload here?
Best regards
 
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