Mark Levinson 390s

bebo60 · 8th February 2008, 03:51 PM

Hi!
I wish to by a 390s from the States, problem: the voltege, does anybody how to make it work at V220? with power amp like 332 or 336 is quite easy! Please help me Thanks
Regards
Adriano

Peter Daniel · 8th February 2008, 05:26 PM

Basically, all Levinson equipment uses jumpers to set transformer primaries which are compatible with all voltages (visible on left in a picture). However, some of the equipment has also circuitry that monitors mains frequency (a chip on the right in a picture of ML390S).

In such case, even if you set primaries properly, you will get diplay message WRONG AC with a code. Apparently, when you contact Madrigal and give them that code, they will provide you with a new code which when entered through the remote will set the microchip allowing the equipment to operate with a new mains frequency (50Hz vs. 60Hz)

bebo60 · 8th February 2008, 07:25 PM

Hi!
thanks for fast replay, I have a 320s and, and this is what I done to make it work at 50Hz is a small board witch generates the frequency, see link.
Adriano
http://img176.imageshack.us/img176/9043/pict0530al2.jpg

Peter Daniel · 8th February 2008, 07:37 PM

Yes, that will work too

anatech · 8th February 2008, 10:52 PM

Hi Adriano,
I noticed that the numbers are filed off the transistors / ICs. Since this looks like an interesting project, would you be willing to detail your circuit to our members?

-Chris

bebo60 · 13th February 2008, 03:38 PM

Sorry i'm not the one who made it, I'm just the 320s owner!! I wish I knew those numbers!! i just can tell you that is something witch give the 60Hz so you do not need a new code
Adriano

wichers · 28th July 2009, 01:58 PM

It was a gamble but I've bought a ML390s in the US and did the conversion myself. There was no password code and it was as simple (for someone who studied older electronics, like my father) as moving a jumper to the correct position.

If you look closely at the following picture: http://www.marklevinson.com/image_library/390SOH.jpg you'll see a white jumper block (8 positions) with copper jumpers. On the picture the jumpers are currently set at 110v (starting from the top that's (2/3 and 5/6)) and should measure something like 27 ohm between line and neutral (that's where the voltage cable goes in).

For 220v there only needs to be one jumper between 4 and 5 and this should measure around 98 ohm. For the 240v configuration one jumper should be set to 1 and 2 and should measure 109 ohm.

Cheers,
Alexander

bebo60 · 28th July 2009, 02:51 PM

Hi!
Is it so simple? what about frequency? 60 to 50Hz end viceversa?
Bebo

wichers · 29th July 2009, 02:51 PM

Hi Bebo,

Yes that simple. I really thought (reading all the stories) there was going to be a 50/60hz check. I even prepared for this and bought a Willem eprom programmer to start hacking (it's a AT29C010A 128k flash). But to my big surprise there wasn't.

And it sounds great

Cheers,
Alexander

andmost · 10th June 2011, 05:49 PM

hello, someone can give an help? I purchased an used preamp Mark Levinson 320s from a seller in U.S.A.. I live in Italy . I received the package this morning from ups and before to turn on I set the preamplifer to 230 / 240 volts ( here in Italy the voltage is 230 /240 ).
When I turned on the preamplifier, it asked me a key of 5 numbers or I can't use it !!! I
don't know that code. What do you think I can do?
Thanks for your help,
Andrea

8th February 2008, 03:51 PM	#1
bebo60 diyAudio Member Join Date: Feb 2008	Mark Levinson 390s Hi! I wish to by a 390s from the States, problem: the voltege, does anybody how to make it work at V220? with power amp like 332 or 336 is quite easy! Please help me Thanks Regards Adriano

8th February 2008, 07:37 PM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Yes, that will work too __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

8th February 2008, 10:52 PM	#5
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi Adriano, I noticed that the numbers are filed off the transistors / ICs. Since this looks like an interesting project, would you be willing to detail your circuit to our members? -Chris __________________ "Just because you can, doesn't mean you should" © my Wife

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8th February 2008, 07:25 PM	#3
bebo60 diyAudio Member Join Date: Feb 2008	Hi! thanks for fast replay, I have a 320s and, and this is what I done to make it work at 50Hz is a small board witch generates the frequency, see link. Adriano http://img176.imageshack.us/img176/9043/pict0530al2.jpg

13th February 2008, 03:38 PM	#6
bebo60 diyAudio Member Join Date: Feb 2008	Sorry i'm not the one who made it, I'm just the 320s owner!! I wish I knew those numbers!! i just can tell you that is something witch give the 60Hz so you do not need a new code Adriano

28th July 2009, 01:58 PM	#7
wichers diyAudio Member Join Date: Jul 2009	It was a gamble but I've bought a ML390s in the US and did the conversion myself. There was no password code and it was as simple (for someone who studied older electronics, like my father) as moving a jumper to the correct position. If you look closely at the following picture: http://www.marklevinson.com/image_library/390SOH.jpg you'll see a white jumper block (8 positions) with copper jumpers. On the picture the jumpers are currently set at 110v (starting from the top that's (2/3 and 5/6)) and should measure something like 27 ohm between line and neutral (that's where the voltage cable goes in). For 220v there only needs to be one jumper between 4 and 5 and this should measure around 98 ohm. For the 240v configuration one jumper should be set to 1 and 2 and should measure 109 ohm. Cheers, Alexander

28th July 2009, 02:51 PM	#8
bebo60 diyAudio Member Join Date: Feb 2008	Hi! Is it so simple? what about frequency? 60 to 50Hz end viceversa? Bebo

29th July 2009, 02:51 PM	#9
wichers diyAudio Member Join Date: Jul 2009	Hi Bebo, Yes that simple. I really thought (reading all the stories) there was going to be a 50/60hz check. I even prepared for this and bought a Willem eprom programmer to start hacking (it's a AT29C010A 128k flash). But to my big surprise there wasn't. And it sounds great Cheers, Alexander

10th June 2011, 05:49 PM	#10
andmost diyAudio Member Join Date: Dec 2009	hello, someone can give an help? I purchased an used preamp Mark Levinson 320s from a seller in U.S.A.. I live in Italy . I received the package this morning from ups and before to turn on I set the preamplifer to 230 / 240 volts ( here in Italy the voltage is 230 /240 ). When I turned on the preamplifier, it asked me a key of 5 numbers or I can't use it !!! I don't know that code. What do you think I can do? Thanks for your help, Andrea

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