Hi OGG-
Thanks for the reply. I do not have the manual. You know, it would be a huge help if you could tell me what the values of the filer caps are. The one that went in mine, or so I am pretty sure is a 22,000
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« Reply #4 on: September 22, 2005, 06:59:30 AM »
OK - there's a few in here to check:
For the +/- 15, there are two 4700uF/40v caps.
For the +/- 5, there are two 22,000uF/16v caps.
If the transformer taps are labelled, the +/- 15 come from taps 13,14,15 and the +/- 5 comes from two unlabelled taps next to that. (I'd guess 16,17, but the schems are unlabelled).
While you're in there, take note of a small DIP jumper block up by the input jacks. If there's a 4.7k resistor across pins 3 and 14, then the input is set up for using the unbalanced jack. No resistor = balanced input. (There's other jumper differences, let me know if you need to pin-by-pin details).
Oh, there's also a note that when you're adjusting the PS voltages, adjust them in this order only: +15, -15, 5
(Looking at the PS board so that the 3 trimpots are arranged with 2 vertically to the left and one to the right, means that the +15 is top left, -15 is bottom left, and 5 is to the right).
Hope that helps.
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« Reply #5 on: September 22, 2005, 08:03:13 AM »
I ordered a manual with schematics, service info from Barco some years ago, I think it was not too expensive, www.barco.comTel in Germany: (+49) 78259060 I had a +- $1000 repair estimate on my 244 via Eela Audio in Holland who was the EMT / Barco rep for NL. (I spotted work orders laying there for about 4 other EMT 244 units and they all had about the same giant repair bill - I think basically they just replaced the whole motherboard) . I said forget that, got the manual and a tech friend got it working with a few new ics. A $7 repair.. It worked for about 2 weeks, sounded cool in grainy kind of way, and then went on tilt again and hasn't been touched since, Was never sure it was working 100% properly when it did work,
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« Reply #6 on: September 22, 2005, 08:31:00 AM »
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« Reply #7 on: September 22, 2005, 08:32:18 AM »
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« Reply #8 on: September 22, 2005, 08:33:31 AM »
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« Reply #9 on: September 22, 2005, 08:34:47 AM »
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« Reply #10 on: September 22, 2005, 08:36:06 AM »
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« Reply #11 on: September 22, 2005, 08:38:45 AM »
Bad RAM leading to strange noises in the digital section,
Hope these schematics are helpful,
Sorry in advance if this was excessive schematic posting,
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« Reply #12 on: September 22, 2005, 02:54:48 PM »
Frieneds,
Thank you very much for the help. I am sure you're time is rare so I can appreciate the help. That is probably all the stuff I need to get her up again. Hey, if you guys want, I sampled her sounding like a transformer at a substation blowing up. Cool for black and white horror films, perhaps Halloween.
Whatever. Cannot thank you enough for the help.
Best,
joshua
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« Reply #13 on: September 23, 2005, 12:24:41 AM »
Ryan, what kind of files are those? I DL'd them but was unable to open them. I'm using a Mac, not that it should matter much. Thanks.
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« Reply #14 on: September 23, 2005, 01:40:38 AM »
Hey yeah, whats goin on here?!?!?!?  Couldn't open them either. Also a mac user. Thanks, josh
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« Reply #15 on: September 23, 2005, 07:02:08 AM »
| bushwick wrote on Fri, 23 September 2005 01:40 |
Hey yeah, whats goin on here?!?!?!?
Couldn't open them either. Also a mac user.
Thanks,
josh
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Windoze dudes open them fine. Looks like a raw bitmap image. If you have some kind of basic/generic paint program that can handle bitmaps, try that. If not, speak up and someone will attempt to save 'em off and reload as gif or jpg
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« Reply #16 on: September 23, 2005, 10:09:41 AM »
| David Kulka wrote on Fri, 23 September 2005 00:24 |
Ryan, what kind of files are those? I DL'd them but was unable to open them. I'm using a Mac, not that it should matter much. Thanks.
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These open fine in Graphic Converter ( http://www.lemkesoft.com/) that is bundled in with more recent MacOS...
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« Reply #17 on: September 23, 2005, 04:38:20 PM »
Yeah, unless you are running 10.4 Mac os, you don't have graphic converter, a program neccessary for converting Pc bitmaps for mac. Just found this out. So, youu can download a trial of the shareware program, "Graphic Converter" here: http://www.lemkesoft.de/en/graphdownld_en.htmIts a trial, that can be purchased for $30. I see the jpegs. Copies look great. Thanks! joshua Stop by and say hi y'all if you're gonna be at AES this year. I'll be at the TAB-Funkenwerk table.
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« Reply #18 on: September 24, 2005, 10:31:03 PM »
Sorry for the difficulties with the EMT 244 scans folks!
Strangely enough, I too am a Mac OSX man,
No idea what happened, I just scanned them & assumed they were regular JPEGS.
Will see if I can re save as JPEG & repost,
Thnx,
Ryan
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« Reply #19 on: September 25, 2005, 02:05:28 PM »
The files open in quicktime without any conversion needed.
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studio infoThey say the heart of Rock & Roll is still beating, which is amazing if you consider all the blow it's done over the years. "The Internet enables pompous blowhards to interact with other pompous blowhards in a big circle jerk of pomposity." - Bill Maher "The negative aspects of this business, not only will continue to prevail, but will continue to accelerate in madness. Conditions aren't going to get better, because the economics of rock and roll are getting closer and closer to the economics of Big Business America." - Bill Graham
« Reply #20 on: September 25, 2005, 03:52:18 PM »
| Ryan Moore wrote on Thu, 22 September 2005 05:38 |
Bad RAM leading to strange noises in the digital section,
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In a pinch you can swap the bad chip down to the LSB section. Not that I would have ever done this before a session; no sir... DC
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« Reply #21 on: September 26, 2005, 01:30:50 PM »
I just tried resaving in the scan program as JPEG which I was sure I did in the first place, but I see the one I reposted still shows up with a '?' question mark,.
Well, hope those who had no luck found a way to convert somehow,,
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« Reply #22 on: November 19, 2005, 06:34:28 PM »
I got myself a 244 today. It works great and I like the sound. However the wires to the second mini switch (far right) has been cut off. No idea why.The switch should effect freq response in the decay I guess. Sounds fine now but it would be nice to have the switch working. Any ideas how I should connect these (three) cables to the switch?
Thanks,
Gunnar
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« Reply #23 on: November 19, 2005, 06:41:44 PM »
BTW, does anybody have a remote for sale? 
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« Reply #24 on: May 23, 2007, 07:32:03 AM »
OK Im new here thanx to EMT 224 wich I recently bought for 200 Euro in nonworking condition....
so far I recaped it and changed about 60 IC sockets and cleaned ICS...
on other forum I got info to change all IC sockets....
THAT IS NO STUPID
I have ursa major 8x32 wich died some timk ago and after changing IC sockets everything was OK again....
PROBLEM ARE RUSTY OLD TEXAS INSTRUMENTS ICS....they sucks big time....and ALSO texas instruments IC sockets are S...T
I HAD SAME PROBLEM IN MY OB 8 ON CPU BOARD .....easy to fix..changed 8 socket and OB worked again
WHELL I TAKE A PART ONE OLD IC SOCKET FROM CPU BOART IN 224 and ...JESUS
totally green contact and black IC PINS...NO WAY THAT CAN WORK....SO I BELIEVE THAT IN SERVICE THEY CHANGE COMPLETE CPU BOARD BECOUSE OF THIS PROBLEM AND WHEN THEY HAVE TIME (AND IT TAKE A LOT TIME TO CHENGE allmost 135 SOCKETS)
they repair it by changing sockets and cleaning IC pins.....I gues
D
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« Reply #25 on: May 23, 2007, 02:18:58 PM »
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« Reply #26 on: May 23, 2007, 03:31:47 PM »
Im also interested in remote for 244
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« Reply #27 on: May 24, 2007, 01:09:28 AM »
I pm'd you too roginator. I have two remotes for 245's which I think will work with 244's.
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« Reply #28 on: November 30, 2010, 11:42:23 AM »
Hi just got a broken EMT 244 from Germany, anybody hook me up with service manual and schematics?
Cheers
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« Reply #29 on: November 30, 2010, 12:19:06 PM »
Have you read the thread?
Btw, does anybody have a schematic for the 245? I'm desperately looking for one.
Best,
Max
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Max Köhrich
« Reply #30 on: November 30, 2010, 02:56:41 PM »
I did, contacted Barco but number is dead, contacted Barco in Belgium but ended up in a buraucratic black hole.
I have seen the posted downloadables but i am not shure if its all i need.
Cheers
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« Reply #31 on: November 30, 2010, 03:00:38 PM »
| David Kulka wrote on Fri, 23 September 2005 06:24 |
Ryan, what kind of files are those? I DL'd them but was unable to open them. I'm using a Mac, not that it should matter much. Thanks.
|
Use preview.
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« Reply #32 on: December 02, 2010, 01:13:28 PM »
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« Reply #33 on: December 03, 2010, 11:28:21 PM »
Stay tuned people - the full EMT244 manual /schematics may see the light of day scanned & online sometime soonish.
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« Reply #34 on: December 06, 2010, 12:09:42 AM »
I too have been looking for 244 and 245 docs for a long time. Fingers crossed.
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« Reply #35 on: December 11, 2010, 02:41:58 PM »
Hi i called EMT Franz (what is left of it) and talked to their head engineer for a while and it does not seem to be that there are any schematics available for the digital board.
The have the algorithm under patent and say cannot hand out digital schematics period. They perform repair to the 244 for 125 eu per hour.
But talking to another former EMT pro seller i found out that the digital board was outsourced by EMT to a american company and he doubts that even EMT have the digital board schematics! He told me repair sequence by EMT was not a repair but a full digital/analog board swap!!
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« Reply #36 on: December 12, 2010, 12:01:37 PM »
The American company was Dynatron, in Massachusetts. I believe the founder (Ralph Zaorski) is still around and was behind the short lived rack mount EMT 250 reissue that came out a few years ago.
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« Reply #37 on: December 12, 2010, 02:22:51 PM »
David, is this a board they rubbed the numbers off the ic's?
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« Reply #38 on: December 13, 2010, 11:29:56 PM »
Doug, I haven't seen a 244 for quite a while so I really don't know but I would guess that most of the logic IC's will be missing their part numbers.
Someday I would sure like to see a timeline or history that covers the 244, 245, and 246. I always think of the 250 as "the first digital reverb" but maybe these models came first? The lower model numbers suggest that, but on the other hand they were all rack mount, so maybe they were more advanced, smaller package units that actually came later. Also, aren't all 3 reverb only? The 250 and 251 have other programs, most of which are silly and never used. People only use the reverb programs, and maybe delay.
Also, I wonder how the 244, 245, and 246 reverb algos sound, compared to the 250 and 251.
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« Reply #39 on: December 14, 2010, 12:58:27 AM »
| David Kulka wrote on Mon, 13 December 2010 23:29 |
Doug, I haven't seen a 244 for quite a while so I really don't know but I would guess that most of the logic IC's will be missing their part numbers.
Someday I would sure like to see a timeline or history that covers the 244, 245, and 246. I always think of the 250 as "the first digital reverb" but maybe these models came first? The lower model numbers suggest that, but on the other hand they were all rack mount, so maybe they were more advanced, smaller package units that actually came later. Also, aren't all 3 reverb only? The 250 and 251 have other programs, most of which are silly and never used. People only use the reverb programs, and maybe delay.
Also, I wonder how the 244, 245, and 246 reverb algos sound, compared to the 250 and 251.
|
Yes, all logic chip numbers are wiped (except the RAM, all 85kbits of it!) From what I recall and have seen, the 244 was introduced as early as 1979 but probably 1980 is a safer bet. It was supposed to be the reverb algo from the 250, wtth a reduced feature set ( for example there is no predelay, only one 6khz HF and one 100hz LF decay multiplication selection, no quad output) 13 bit successive approximation A/D, and 16 bit D/A, 18khz sample rate (IIRC the 250 was 26khz?).
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« Reply #40 on: December 16, 2010, 12:31:12 AM »
| Knobexploit wrote on Sat, 11 December 2010 20:41 |
Hi i called EMT Franz (what is left of it) and talked to their head engineer for a while and it does not seem to be that there are any schematics available for the digital board.
The have the algorithm under patent and say cannot hand out digital schematics period. They perform repair to the 244 for 125 eu per hour.
But talking to another former EMT pro seller i found out that the digital board was outsourced by EMT to a american company and he doubts that even EMT have the digital board schematics! He told me repair sequence by EMT was not a repair but a full digital/analog board swap!!
|
Yes I too recall there being some lore about the digital section being designed by an American company where the technology was kept top secret apparently because of military contracts/connections (?). In around '97 I saw a bunch of EMT/Barco factory repair bills for a couple of EMT244 units when I was at Eela Audio in the Netherlands & they were all around the same amount (expensive) - definitely could be consistent with a full board swap.
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« Reply #41 on: December 16, 2010, 12:07:20 PM »
The EMT page on my own site (which I wrote some years ago!) has some further info on all this and may be of interest. http://studioelectronics.biz/Services-EMT-13.htmlIt mentions "In 1972, EMT released the very first digital reverb, the rack mount 144." I'd forgotten that.  Looks like the 244 was released in about 1979 or 1980, several years after the 250 which came out in '76.
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