| Lexicon 300 with Larc Repair [message #335586] |
Tue, 22 April 2008 10:41  |
 mjgreeneaudio
Messages: 194
Registered: October 2006
Location: Land Behind The Zion Curt... |
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I have a Lexicon 300L that has stopped working. It won't pass any reverb. The digital connections will lock and it passes audio through but it doesn't pass any reverb and the analog connections won't pass anything at all.
Who can repair this unit? Does Harmon/Lexicon still repair them? If not who out there can fix this unit up so that I can use it again?
Thanks,
Michael Greene
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| Re: Lexicon 300 with Larc Repair [message #335603 is a reply to message #335586 ] |
Tue, 22 April 2008 11:29  |
amorris
Messages: 454
Registered: June 2004
Location: florida |
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Lexicon pro legacy products says that it is still supported. so yes lexicon harmon should be able to repair it.
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| Re: Lexicon 300 with Larc Repair [message #335762 is a reply to message #335670 ] |
Tue, 22 April 2008 21:36 |
Mark Donahue
Messages: 141
Registered: September 2004
Location: Boston, MA |
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Michael,
Before packing the unit up and sending it back to what is left of the mothership, check a couple of things.
1) Replace the battery in the unit with a fresh one. This is one of the most common problems with these units.
Also, while you have the unit open, check out the power supply rails and any fuses.
2) If you don't want to tackle the battery, the other thing to try is to flash the units memory back to original factory. The procedure is in the manual.
What makes me think that it is not a fatal problem is that the digital IO is still passing audio. If the main board was FUBAR, this would actually be the first thing to go.
Good luck-
-mark
************************
Mark Donahue
Chief Mastering Engineer
Soundmirror, Inc.
Boston, MA
http://www.soundmirror.com
************************
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| Re: Lexicon 300 with Larc Repair [message #335782 is a reply to message #335762 ] |
Tue, 22 April 2008 22:51 |
mjgreeneaudio
Messages: 194
Registered: October 2006
Location: Land Behind The Zion Curt... |
Active Member |
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| Mark Donahue wrote on Tue, 22 April 2008 20:36 |
Michael,
Before packing the unit up and sending it back to what is left of the mothership, check a couple of things.
1) Replace the battery in the unit with a fresh one. This is one of the most common problems with these units.
Also, while you have the unit open, check out the power supply rails and any fuses.
2) If you don't want to tackle the battery, the other thing to try is to flash the units memory back to original factory. The procedure is in the manual.
What makes me think that it is not a fatal problem is that the digital IO is still passing audio. If the main board was FUBAR, this would actually be the first thing to go.
Good luck-
-mark
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Mark,
Awesome suggestions. Thanks you a million times over. I will pull the unit later this week and check all these things. You may have just saved me a lot of money and I will owe you a round of beers or your drink of choice.
Thanks again,
Michael Greene
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| Re: Lexicon 300 with Larc Repair [message #337697 is a reply to message #335586 ] |
Tue, 29 April 2008 16:09 |
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Michael, let us know how it works out.
There was a guy out there, Jim Fabiano, who had worked at Lex for years, but was repairing the older units freelance. But his website now has an unwelcome story...
http://www.jimfabiano.com/
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| Re: Lexicon 300 with Larc Repair [message #339808 is a reply to message #337779 ] |
Thu, 08 May 2008 12:04 |
mjgreeneaudio
Messages: 194
Registered: October 2006
Location: Land Behind The Zion Curt... |
Active Member |
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| mjgreeneaudio wrote on Tue, 29 April 2008 22:30 |
| compasspnt wrote on Tue, 29 April 2008 15:09 |
Michael, let us know how it works out.
There was a guy out there, Jim Fabiano, who had worked at Lex for years, but was repairing the older units freelance. But his website now has an unwelcome story...
http://www.jimfabiano.com/
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Will do. I contacted Lexicon and received this response.
Michael,
You may want to try resetting the unit. To do this you will need to remove the EEPROM at board location U21 from it’s socket and short all of the pins to ground then re-insert the EEPROM (with the correct polarity) and start the M300L. If this does not fix the problem we can set up a repair for the unit.
There is a $325 flat rate for repair of the M300L. This charge covers parts, labor and shipping back to you but will not cover extensive damage. If additional charges are required for the repair you will be contacted before we proceed.
I am still trying to find an hour to pull the dead unit and do this. Hopefully next
Monday at the latest I will tackle it.
Worst case the $325 is more than resonable and since they are just across town I can drive it over and save the shipping. I am just really glad they are still fixing these units. There are so many out there it would be a shame to have them all fall by the wayside as has seemed to have happened to the TC M-5000 units.
I will let you guys know on Monday if this fixes the problem. I have a lot of mixing to do next week and subbing out a PCM-91 just isn't doing it in the same way. I certainly is not the same box or the same sound. Not even close really.
Thanks,
Michael Greene
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Ok. So I finally stole an hour to open this up. The above suggestions from Lexicon fixed the problem at least for now. It seems to be working just fine. Pulling the U21 Eprom and shorting all the pins to ground with the power off has reset the unit and brought it back to its original factory state. It actually seemed to have fixed some of the strange glitches that I was having since I bought the unit 3 years ago. The Larc works more stable and the programs load faster and without reverting back to the original program loaded. I always thought that was weird since I have never encountered that with any 224L's, 480L's or any other 300L's. So its all good for now.
One caveat: If you have any user stored programs, try and write them down. It erases them from memory and they are gone! I only had a couple and I had written down hard copies of them so if your going to do this and wish to save any custom programs write them down before attempting.
At least it is a nice reward after pulling the unit and taking out the 3 million screws just to get the top off. (Ok maybe it was only 18 or 20 but you get the point.)
Thanks to all for your suggestions and help. Now if I can just keep this baby working for a few more years.
And one more aside. If anyone things that a PCM-91, PCM-90 or something along those lines of Lexicon products sound anything like a 300 or a 480 then your up in the night. After subbing out a PCM-91 and going in Digital I can tell you that it is a thin fizzy POS compared to the higher end Lexicon products. It just doesn't cut it.
Thanks again,
Michael Greene
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