Linn "LINTO" MC Preamp Schematic without SMPS - Schematic for SMPS wanted - diyAudio
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Old 27th January 2010, 12:35 PM   #1
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Default Linn "LINTO" MC Preamp Schematic without SMPS - Schematic for SMPS wanted

I need the schematic diagram from the switch mode power supply. Who can help?

Here the PDF schematic of the preamp itself (please note: first generation Linto, not currently version !!! ) I have created this schematic for the introduce of an interface (to connect an external parallel regulated power supply) some years ago.
Attached Files
File Type: pdf C_tmp_Linn Linto_ckt.pdf (54.0 KB, 1683 views)
File Type: pdf Linto PCB.pdf (121.0 KB, 893 views)
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Old 27th January 2010, 05:27 PM   #2
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Thank you very, I own one Linto & due to a storm the smps has gone, I asked Linn to supply me a new smps & the answer was buy a new unit.
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Old 27th January 2010, 06:39 PM   #3
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Quote:
Originally Posted by merlin el mago View Post
Thank you very, I own one Linto & due to a storm the smps has gone, I asked Linn to supply me a new smps & the answer was buy a new unit.
Yes, because Linn isn't the manufacturer of this SMPS. Also not of the SMPS "Brilliant" inside in "Karik" compact disc player and "Kairn" preamplifier. The manufacturer of the "Brilliant" was "HDS-Power" (HDSP ltd.).
Unfortunately I haven't find out the manufacturer of the SMPS for the Linto.

At best you buy a second failured device of your SMPS (e. g. by ebay). Then you can send me both for a cost estimate and repair. Please ask additional Linn in Spain, how expensive is a replacement SMPS for Linto.

Last edited by tiefbassuebertr; 27th January 2010 at 06:41 PM.
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Old 29th January 2010, 03:42 AM   #4
Bonsai is offline Bonsai  Taiwan
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"Thank you very, I own one Linto & due to a storm the smps has gone, I asked Linn to supply me a new smps & the answer was buy a new unit. "

Thats terrible. Lighting happens.

Looks like that's another brand to avoid because of a crappy attitude to after salses service.
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Old 29th January 2010, 11:18 AM   #5
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Quote:
Originally Posted by Bonsai View Post
"Thank you very, I own one Linto & due to a storm the smps has gone, I asked Linn to supply me a new smps & the answer was buy a new unit. "
Thats terrible. Lighting happens.
Looks like that's another brand to avoid because of a crappy attitude to after salses service.
What other brand? As far as I know, that all SMPS devices made for for Linn of very high engineering quality (from the "Brilliant from HDSL I know this exactly, because I have created a circuit diagram).
I also noted from Linn always that repair service are well run, because inside only very few "custom made" devices (of course only when there are the circuit diagrams). For the first Linn amplifier device e. g., - the LK-1 most components are still to find, even the Hitachi MCU from the processor PCB.

Now we note, that there are already two faulty SMPS devices for the Linto (yours and that one from merlin el mago). After additional find of a second failured pair we have 4 pieces and then I could start to create the schematic (reverse engineering). Unfortunately I haven't such failured power supply, but maybe someone is willing to send me such defective SMPS.
After completion of the schematic maybe we have found further 10 units ore more, and I could start troubleshooting.

In the attachement the schematic of "Brilliant" SMPS from HDS-Power. I have created it some years ago to carry out the repair service by 12 pieces failured devices. Except the transformer and the very special enclosure (see the embedded version inside of "Kairn" from the attachements) no custom made devices there are in use.

The first picture shows the embedded SMPS, from which is the created schematic.

The second picture shows an other (older?) "Brilliant"- version from Linn. This schematic I don't have !!

By the way - an interesting solution for the voltage select 115VAC/230VAC from SGS-Thomson (ST) also inside; more information (circuit description) easy to find about the appropriate application notes (see datasheets from "ST and "TI").
Attached Images
File Type: jpg Linn Brilliant kairn1.jpg (25.3 KB, 1831 views)
Attached Files
File Type: pdf Linn Brilliant Alt.pdf (154.6 KB, 929 views)
File Type: pdf C_tmp_Linn Kairn SMPS_ckt.pdf (78.3 KB, 876 views)

Last edited by tiefbassuebertr; 29th January 2010 at 11:40 AM.
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Old 1st February 2010, 12:25 AM   #6
pfrank is offline pfrank  United States
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Thank you for the Brilliant U25W schematic. My Linn Wakonda uses the same PS (as far as I can tell) and died several years ago. Symptoms include a dim power indicator light which slowly dies altogether within 2 or 3 seconds after switching the unit "on". The indicator panel never is illuminated.

On page 3 of your schematic (drawing 21.12.2001), the main faults are listed as R15-R14-R9 of the AVS and R13-R12 of the 9V4 start voltage circuit. Is this where you would start with troubleshooting my problem?

Thank you!
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Old 1st February 2010, 09:26 AM   #7
Calvin is offline Calvin  Germany
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Hi,

@Tiefbass: In the Linto schematics the transistors marked as 4E and 2G (page2) are of different Type NPN/PNP. The ZETEX FMMTA56 and A92 are both PNPs. Could it be that the 2G-marked types are FMMT A06?

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Old 2nd February 2010, 11:03 PM   #8
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Quote:
Originally Posted by pfrank View Post
Thank you for the Brilliant U25W schematic. My Linn Wakonda uses the same PS (as far as I can tell) and died several years ago. Symptoms include a dim power indicator light which slowly dies altogether within 2 or 3 seconds after switching the unit "on". The indicator panel never is illuminated.

On page 3 of your schematic (drawing 21.12.2001), the main faults are listed as R15-R14-R9 of the AVS and R13-R12 of the 9V4 start voltage circuit. Is this where you would start with troubleshooting my problem?

Thank you!
No, because this behavior can indicate a protect mode through too much current flow of your Wakonda.
First you need a second Wakonda device - also with SMPS - with proper function. Then you must disconnect the SMPS in both devices and connect both to each other Wakonda device - you can also test this also with "Karik" and "Kairn", if there is the same SMPS inside.
Only now you can observe, whether amplifier or SMPS is faulty.
If the mentioned error is clearly comes from the SMPS, then you can check R15-R14-R9 of the AVS and R13-R12 of the 9V4 start voltage circuit as first steps of troubleshooting.

Calvin: FMMTA06 = 1G - go to
http://www.diodes.com/zetex/_pdfs/3.0/pdf/FMMTA06.pdf
2G could be a read error or misprint from me - but you are right - it cannot be a PNP.
The types not critical in generall - the only importamnt thing is the appropriate choice according the idle currents.
By the way - the RIAA head amp from LK-1 is only in unimportant details different but basicly the same circuit !!! If you want to clone, use the leaded transistor types from LK-1 (from DIODES formerly ZETEX).

Last edited by tiefbassuebertr; 2nd February 2010 at 11:19 PM.
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Old 29th March 2010, 04:43 PM   #9
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schematic for "LINTO" SMPS still needed
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Old 25th November 2010, 11:51 AM   #10
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Who knows the manufacturer of this SMPS ??
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