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meverylame

Tin Man

Posts: 48 Member Since: 04/02/2011

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Jul 27 12 1:46 AM

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I've got a pair of Lexicon 224s (non x or xl) that I've managed to get back to life with some success though ultimately I've ended some variety of intermittent issues. Works for a bit, then something on the digital boards fails, its a a little exhausting (especially as they're one of my favorite reverbs at this point). So this last week I rolled up my sleeves and decided to recap the power supply hoping to start to stabilize the darn thing. Finished it today and plugged it in to a rather disappointing result of the +/- 12v rails being out of spec @ 11v ( 11.4 is the lowest voltage recommended in the manual. So I've just ordered the all the IN5404 to fully redo all the PSUs as well as all the rectifiers just to make sure that these things will be right.
However I do have a few questions:
1.) Does anyone have the V 4.4 software available to be able to burn some fresh eproms with? I have the NVS board and just want to make sure I'm going to get as close to new as I can on these.
2.) Does it make any sense to replace the tantalum capacitors on any of the boards? Not so much for any sonic reason but more for just general long term reliability.
3.) Does anyone have any experience calibrating both the A/D and D/A sides of the machine for maximum S/N ratio? 

In any case I know lots of people still own these but have given up (especially in the states) after Jim Fabiano left the biz, but it sure feels like these aren't TOO much handle and that with a little bit of leg work we can keep these beauties going for everyone for quite some time to come.
Thanks,
Jason

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cgc

Gold Finger

Posts: 944 Member Since:06/02/2011

#1 [url]

Jul 27 12 10:22 AM

The software is the real longevity Achilles Heel with devices like this.  I was starting to gather an impressive collection of Lexicon, Roland, etc with dead EPROMs and no source for new code.  I think Chuck Zwicky (zmix here) may have 224 ROM files or at least know who does.  Someone should create an online archive for the ROM files for old equipment.  

The converter calibration was usually in the service manual.  I never had to do it for any of the old Lex gear, but Fabiano always did whenever something was sent in.  I couldn't really tell much of a difference; the noise was always there but never much of an issue in a mix..

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zmix

Aqua Marine

Posts: 4,169 Member Since:20/01/2011

#4 [url]

Jul 28 12 9:24 AM

Hi Jason,

I have a 224 without the NVS board, and have created some custom ROMs to allow access to the additional programs that the NVS provided.  I have every rev up to 4.4, and a supply of EPROMS, so PM me and I'll see what I can do to help!

Also the converter calibration is in the manual, if you're comfortable with the procedure, and have an extender board, it should be no trouble.

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tschimley

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Posts: 1 Member Since:29/12/2012

#5 [url]

Dec 29 12 2:29 PM

Hi Jason;
   I read your post on recapping your power supply on your 224. I have an original 224 blackface that I think needs the power supply re done. The digital numbers and lights on the controller quiver from bright to not so bright. also the power supply is the original. Can you give me any tips on going about doing this? What to purchase, how to disassemble?Thanks Jason, Thomas

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zmix

Aqua Marine

Posts: 4,169 Member Since:20/01/2011

#6 [url]

Dec 29 12 5:32 PM

Hi Jason;
   I read your post on recapping your power supply on your 224. I have an original 224 blackface that I think needs the power supply re done. The digital numbers and lights on the controller quiver from bright to not so bright. also the power supply is the original. Can you give me any tips on going about doing this? What to purchase, how to disassemble?Thanks Jason, Thomas

-tschimley

Those aren't the symptoms of faulty power supply caps. Sounds like you should clean or replace the remote cable.

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johnmonforte

Silverado

Posts: 77 Member Since:15/04/2011

#7 [url]

Dec 30 12 12:44 AM

A common problem with these is the poor contacts in the Molex connector in the supply. This could also affect the remote, since power ultimately comes form here too.

Check the voltabes in the main rack to be sure everything is good there.

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nicrom

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Posts: 2 Member Since:23/02/2017

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Feb 23 17 12:05 PM

Hey guys! new to the forum, but with 224 problems!

i m looking for some lexicon 224 eproms... i have a faulty 224, and i m trying to repair it, is it possible to buy them aywhere? or anyway that you can help me?

thanks

bests

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