SSlmixed.com Forum
Tech discussion => 4K,6K,8K Series => Topic started by: tlmaen on February 09, 2023, 11:49:41 AM
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Hi!
I've started assembling my new old E series console.
Now I have some questions...
Instead of opening lots of new threads, I think it's easier and more focused to put everything in one thread.
First Question:
How do I connect these 6 pin connectors to the upper bus card under the console?
In the documentation they are labeled B, C, D, E, F, G, H, K, T & B3
Do the letters correspond to the patchbay rows?
What are T and B3 for?
Thanks!
Tilmann
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Hi,
Yes they are the patchbay rows.
T is for tape arm remotes.
B is power.
All of this is documented in the wiring section of the service manual.
Anthony.
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ah, great, found it! (at the very end after 1000 Pages of Ribbon Connectors).
Still can't find the BICC Connection for 'C' in the Manual, but that's probably MTRK RET...
Thanks!
Tilmann
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Hi, just seen this post so hope I can help although it has been a few decades since I was involved with this even though I worked at SSL from 1980-87).
From memory, the upper buscard (originally 82E18?) with all the audio 6 way Bicc connectors on, had the following:
B Mic inputs
D Line inputs
E Channel insert sends
F Channel insert returns
G Group outputs
H Group Monitor returns
K Tape Monitor returns
The above all refer to the patchbay rows and it may be a good idea to label them on the front panels (A B, C, D etc) so your external wiring can be easily referred back to the patchbay which would be helpful for outboard units (always label them with a patchbay ref such as U42 which is patchbay row U, jack 42) rather than any gear you plug into as it WILL change over time.
All these have 1 x 6 way Bicc connector for two channels (1&2, 3&4 etc). 1, 2 and 3 are the odd channel (Hot, screen and cold) and 4, 5 and 6 are the even channels (such as 2, 4, 6 etc).
T Bicc connector is the track arming one for analog tape machines but rarely used these days with all the digital recording gear. Having stated that, I may be about to wire one of those shortly as they go to DL's 41 and 42, the track arming connectors on the connector panel which need wiring out to an analog tape machine (Otari MTR90 in my case). The wiring for this does NOT appear on the patchbay as it goes straight form DL's 41 and 42 to the buscards on Bicc T.
1 X 8 channel buscard will have a 6 way Bicc for power, labelled B3 which was also used elsewhere in the console (the 681 keyboard for example).
As far as I know, there is NO Bicc C !!!???
Hope this helps from Jim Lassen, UK and wiring moderator on here.
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Hi Jim, great post, thanks!
I was wondering about the connector C...
One thing is not clear to me yet.
All my internal wires are labeled with the channel number and letter
for the connector. But one cable is marked "Y".
Had to leave before I could investigate further.
Will check tomorrow when I start connecting the wires from channel one up.
Maybe someone has an idea?
Very exciting to put the console together after looking at it in my recording room for the last 3 months!
Thanks
Tilmann
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Hi Timaen
Thanks for your comments.
Surely Bicc Connector C does NOT exist???
"One connector marked Y" ... Is this for every channel? Take some pictures please.
The only thing I can think of is that the "Y" cable is the one from DL 11 or 12 (multitrack returns) which would go to row C (multitrack returns) and is LINKED to row J (also multitrack returns).
Both C and J get half normalled to rows D (line inputs) and K (tape mon inputs) BUT, in your case they may be separate and NOT linked so, let me know as this happened sometimes.
Hope this helps from Jim Lassen (jimlfixit on here).
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The only time I ever came across "Y" labelled cables was when it was associated with optional functions like "Solo Isolate" or "Solo Link"
I agree with Jim, some photos would be of assistance.
Anthony.
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Thank you Jim & Anthony!
It took me all day to connect all BICC connectors to the 44 channels and add the missing Direct Outs 33-44.
Each channel has the connection marked 'Y', not a connection marked 'C'.
I have to track it down tomorrow. The cables are connected to the external patch bay with Tuchel connectors, no DL connectors here.
Will take some pictures tomorrow.
The two patchrows 'multitrack return' are individually wired to the console, but terminate on the same console Tuchel connectors.
The console is from 1980, so probably no solo isolate or link functions...
Thanks!
Tilmann
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Hi Timean
Your reply makes sense and is as I suspect, the multitrack returns are separately wired from your connector (Tuchel 24 or 36 way as opposed to a DL 96 way).
Will await your pictures but I am guessing that the Tuchel has two wires from each contact, one to row C on the patch (multi returns which is half normalled to row D ... line inputs) and the other one to row J which is half normalled to row K (tape monitor inputs).
Normally, multitrack returns would go from the DL11 (1-24 or 32) to patchbay row C (multitrack returns) and that would get internally LINKED to row J (also multitrack returns).
In your case, I think the Tuchel ('s) feed row C (half normalled to D ... line inputs and Bicc D) and the so called 'Y' lead goes directly to row J multi returns on the patch) which gets half normalled to K (tape inputs). Therefore you probably don't have a Bicc lead labelled K1 for instance as it would be labelled Y1 instead. Is this correct?
It is the same difference in a way as the LINK between row C and J is done from the Tuchel as it would be much more difficult on a DL with the smaller contacts which are crimped, not soldered.
Later consoles would have the multi returns going to row C and LINKED within the patchbay to row J. Your one just does the same link directly from the connector rather than have the link within the patchbay.
Hope this makes sense and take some pictures. Is row C half normalled to D and row J half normalled to K? Also, are there two wires from each Tuchel pin (which are solder connections)?
I have been meaning to document the SSL patchbay with schematic drawings but need to pay the rent first!
Tired now and need my beauty sleep as I am 66! Nite all.
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My console is 15 years newer than yours but on my console the wires that were labeled Y were the Group Monitor Returns. These are Yd from the tape machine send row H. The one under Group Outputs. This is what you hear when you press the ready group button. Their corresponding Bicc is labeled H.
Richard
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My console is 15 years newer than yours but on my console the wires that were labeled Y were the Group Monitor Returns. These are Yd from the tape machine send row H. The one under Group Outputs. This is what you hear when you press the ready group button. Their corresponding Bicc is labeled H.
Richard
Hi Richard, that makes sense.
I just noticed that my upper bus cards don't have a 'C' connector!
I couldn't find it in my documentation either.
It was only mentioned:
B Microphone Input
D line Input
E Insert send
F Insert Return
G Group output (Direct out?)
H Group monitor Input
K Tape Monitor Input (which I assume needs to be connected to 'Y' in my case).
T Multitrack REMOTES (No cables for this connector in my console).
The 'Upper Bus Card Layout' sheet is not present in my 1980 documentation.
(I have a second 1995 E-Series service manual where it is).
Thanks,
Tilmann
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Your reply makes sense and is as I suspect, the multitrack returns are separately wired from your connector (Tuchel 24 or 36 way as opposed to a DL 96 way).
Will await your pictures but I am guessing that the Tuchel has two wires from each contact, one to row C on the patch (multi returns which is half normalled to row D ... line inputs) and the other one to row J which is half normalled to row K (tape monitor inputs).
Yes, that is correct.
Normally, multitrack returns would go from the DL11 (1-24 or 32) to patchbay row C (multitrack returns) and that would get internally LINKED to row J (also multitrack returns).
I removed the whole multicore to the Tuchel Connector and linked it internally (C to J).
(One of two modifications I did to the original remote Patchbay)
In your case, I think the Tuchel ('s) feed row C (half normalled to D ... line inputs and Bicc D) and the so called 'Y' lead goes directly to row J multi returns on the patch) which gets half normalled to K (tape inputs). Therefore you probably don't have a Bicc lead labelled K1 for instance as it would be labelled Y1 instead. Is this correct?
I don't think so, as I have wires for each Channel wich are labeled 'K'
It is the same difference in a way as the LINK between row C and J is done from the Tuchel as it would be much more difficult on a DL with the smaller contacts which are crimped, not soldered.
Later consoles would have the multi returns going to row C and LINKED within the patchbay to row J. Your one just does the same link directly from the connector rather than have the link within the patchbay.
Yes, but I changed it to internal linking.
Hope this makes sense and take some pictures. Is row C half normalled to D and row J half normalled to K? Also, are there two wires from each Tuchel pin (which are solder connections)?
My Guess is, that the Cables labeled 'Y' hast to be connected to the Buscard connector labeled 'H', as it is the only one left (except for 'T').
Does that make sense?
Attached some Pics.
Thanks!
Tilmann
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I Think I leave it for now at it is, and test the connections when the Patchbay is connected...
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Any idea what those metal bars are for?
Maybe somehow to attach the plasma box to the console?
couldn't figure it out yet...
Thanks
Tilmann
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FIXED:
There was a sheet of paper documenting the CH position of each frequency.
Is there a way to identify the correct Channels for the Bargraph Meter, so that the Analyzer Frequencies are in the right order?
The Meters have no channel information, all in one Box...
Thanks,
happy Sunday!
Tilmann
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Hi Timean
Almost too many questions to answer in writing but you are welcome to get in contact and have a phone call (whatsapp etc) about this as it would save time me writing although I seemed to have already done it!
Your console is indeed quite old (about 1980-81?) judging from the cable and connectors used.
Some brief answers as I can't spend much time on this right now.
1 Maybe SSL didn’t link the C and J rows in those early days? (I was there from 1980-87) but didn’t do any work on the frame wiring until after I left. C and J should be linked within the console patchbay (only screen ONE end) so that multitrack returns go to both Line Inputs and Tape Monitor Inputs as is standard these days.
2 The copper metal bars are for the 0v grounding and you should have two of them, one for the analogue and one for the other stuff which both join together at the DL panel and go out to a grounding connection (normally the computer or perhaps a clean earth connection if not) via a 0BA (M6) screw.
3 If you have Bargraph meters, the main box for these is secured at the back with along with various PCB’s in it. It would what be called a bulge panel and made by SSL. This would replace a standard flat black rear panel on the console.
4 Your connectors look like 30 way Tuchels which the BBC and Danish Radio used back in the 1980’s.
Going through your pictures:
1 Looks like some mods have been done by others on the upper buscards judging by the capacitors and different wiring used. Also surprised that Bicc T was not wired as that was the one for track remotes/arming and back in those days, that would have useful for Analogue tape machines. The B3 Bicc is a standard power supply connector for SSL’s and contains +20v, -20v, 0v, +11v for the meters etc and was also used for the 681 keyboard and other stuff within the console.
2 Bicc T is unused (see point above). The Blue ribbon connectors were Thomas and Betts to be replaced by 3M grey versions later on. Also, the coloured ribbon cable was quite expensive so was just used for Bargraphs and custom stuff later on so the different wire colours could be identified easily. SSL just used 3M grey ribbon for most of their ribbon connections from about the early 1980’s.
3 The patchbay picture looks fairly standard and, as a point of interest, notice they didn’t use the LETTERS ‘I’ or ‘O’ on the patchbays. This was because those letters could have been confused with the NUMBERS … 1 or 0 … Get it? Clever huh?
4 Those labels are very old in the picture but are labelled with a patchbay reference (if applicable) and a channel number. This Y version seems to be a split lead somehow.
I bought ALL of SSL’s stock of these Brady labels and have a few thousand here if anyone wants to buy them (I will put an advert on here at some point).
5 The copper bar is one of two through the console which join at the end under the patchbay connector panel, although I can’t see two in this picture. No idea why red and blue cables are wired to this as they should be just white for 0V (early days perhaps?). PS: SSL could not buy green wire in those days, hence being white cable.
6 Standard SSL 6 way Bicc list … moving on ...
7 Looks like lots of 30 way Tuchell connectors (or Winchester?). I enlarged the picture and they are 30 way I think and all soldered, unlike 96 way DL’s which are crimped (I supply DL's to most of the UK and Europe by the way). These would probably have 8 balanced circuits (24 pins) on each I think, therefore using 4 times the amount of connectors as a 96 way DL would!
8 Your drawing of the upper buscard (82E18?). All SSL ribbons were 'S'… something with an 'E' at the end (for E series). The MO versions were Molex 0.10” connectors used later on (especially on the 5K consoles etc). Surprised that the Tape remotes (BICC T) were not fitted (see point 1). Bicc C should NOT exist and I have never heard of that but it must be to do with patchbay row C (multitrack returns) before things changed and the patchbay rows C and J were linked within the console.
Damn it, I have now spent over an hour on this and I don’t type quickly! Get in contact if required but hope this answers some of your questions.
I wish I had this console in my old workshop as I could have sorted it out very quickly but, time moves on and I just work from home these days as there is hardly any work.
After 4am UK time now and I must get some food and sleep. Goodnight all for now. At some point I will document most of the SSL patchbay plus other connectors and also some wiring tips (most of my stuff got blitzed when a hacker deleted loads of pictures years ago which means I need to find them again ... meanwhile I really need to pay the rent otherwise I won't be able to contribute for much longer on here!).
Hope my comments help all. Regards from Jim Lassen in the UK.
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Great Indo Jim. Appreciate all of your hard work!
Mike Trimble
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Hi Mike Trimble
Thanks for your kind comments.
There is so much I can post on here but that won't literally pay my rent for free information and there is hardly any work these days.
At some point I will:
1 Catch up on my old wiring posts where the pictures have been deleted by the hacker years ago (big ARGH!). I have all the pictures but need to spend time finding the correct ones and re-posting them. This has really pissed me off big time and I hope this can't be hacked again like it was before.
2 Document the SSL patchbay with mics, inserts, tape outs and returns (which will be helpful) plus most of the centre section stuff. I have prepared some drafts already.
3 Post some SSL history stuff and some of the designers and others involved. Again, I have prepared some draft posts.
4 Document the SSL connector panel with most of the connectors you may never use but wish to know about, just in case!
Hope this helps for now but I am running out of steam with all this as I need to pay bills first.
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Hi Jim,
thank you very much for your detailed answer!
Hi Timean
Almost too many questions to answer in writing but you are welcome to get in contact and have a phone call (whatsapp etc) about this as it would save time me writing although I seemed to have already done it!
Your console is indeed quite old (about 1980-81?) judging from the cable and connectors used.
Yes, it dates from 1980 and was the first console to ship with plasma bar graphs (I'm told...)
At the time, they asked for his Tuchel connections because it was being sold to Danish radio.
Some brief answers as I can't spend much time on this right now.
1 Maybe SSL didn’t link the C and J rows in those early days? (I was there from 1980-87) but didn’t do any work on the frame wiring until after I left. C and J should be linked within the console patchbay (only screen ONE end) so that multitrack returns go to both Line Inputs and Tape Monitor Inputs as is standard these days.
Yes, did that.
2 The copper metal bars are for the 0v grounding and you should have two of them, one for the analogue and one for the other stuff which both join together at the DL panel and go out to a grounding connection (normally the computer or perhaps a clean earth connection if not) via a 0BA (M6) screw.
I definitely have only one copper Bar!
3 If you have Bargraph meters, the main box for these is secured at the back with along with various PCB’s in it. It would what be called a bulge panel and made by SSL. This would replace a standard flat black rear panel on the console.
4 Your connectors look like 30 way Tuchels which the BBC and Danish Radio used back in the 1980’s.
Yes!
Going through your pictures:
1 Looks like some mods have been done by others on the upper buscards judging by the capacitors and different wiring used. Also surprised that Bicc T was not wired as that was the one for track remotes/arming and back in those days, that would have useful for Analogue tape machines. The B3 Bicc is a standard power supply connector for SSL’s and contains +20v, -20v, 0v, +11v for the meters etc and was also used for the 681 keyboard and other stuff within the console.
I was also confused that there are no cables for 'T' as they used two Studer tape machines.
2 Bicc T is unused (see point above). The Blue ribbon connectors were Thomas and Betts to be replaced by 3M grey versions later on. Also, the coloured ribbon cable was quite expensive so was just used for Bargraphs and custom stuff later on so the different wire colours could be identified easily. SSL just used 3M grey ribbon for most of their ribbon connections from about the early 1980’s.
3 The patchbay picture looks fairly standard and, as a point of interest, notice they didn’t use the LETTERS ‘I’ or ‘O’ on the patchbays. This was because those letters could have been confused with the NUMBERS … 1 or 0 … Get it? Clever huh?
That is very clever!
4 Those labels are very old in the picture but are labelled with a patchbay reference (if applicable) and a channel number. This Y version seems to be a split lead somehow.
I bought ALL of SSL’s stock of these Brady labels and have a few thousand here if anyone wants to buy them (I will put an advert on here at some point).
5 The copper bar is one of two through the console which join at the end under the patchbay connector panel, although I can’t see two in this picture. No idea why red and blue cables are wired to this as they should be just white for 0V (early days perhaps?). PS: SSL could not buy green wire in those days, hence being white cable.
6 Standard SSL 6 way Bicc list … moving on ...
7 Looks like lots of 30 way Tuchell connectors (or Winchester?). I enlarged the picture and they are 30 way I think and all soldered, unlike 96 way DL’s which are crimped (I supply DL's to most of the UK and Europe by the way). These would probably have 8 balanced circuits (24 pins) on each I think, therefore using 4 times the amount of connectors as a 96 way DL would!
They have 10 Channels on each connector, saving some space
8 Your drawing of the upper buscard (82E18?). All SSL ribbons were 'S'… something with an 'E' at the end (for E series). The MO versions were Molex 0.10” connectors used later on (especially on the 5K consoles etc). Surprised that the Tape remotes (BICC T) were not fitted (see point 1). Bicc C should NOT exist and I have never heard of that but it must be to do with patchbay row C (multitrack returns) before things changed and the patchbay rows C and J were linked within the console.
Damn it, I have now spent over an hour on this and I don’t type quickly! Get in contact if required but hope this answers some of your questions.
I wish I had this console in my old workshop as I could have sorted it out very quickly but, time moves on and I just work from home these days as there is hardly any work.
After 4am UK time now and I must get some food and sleep. Goodnight all for now. At some point I will document most of the SSL patchbay plus other connectors and also some wiring tips (most of my stuff got blitzed when a hacker deleted loads of pictures years ago which means I need to find them again ... meanwhile I really need to pay the rent otherwise I won't be able to contribute for much longer on here!).
Hope my comments help all. Regards from Jim Lassen in the UK.
Thanks again!
Hope this helps other too!
Best,
Tilmann
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Great Indo Jim. Appreciate all of your hard work!
Mike Trimble
Yes! Thanks!
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Any idea what those metal bars are for?
Maybe somehow to attach the plasma box to the console?
couldn't figure it out yet...
Thanks
Tilmann
Anyone?
Pls see picture...
Thanks,
Tilmann
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Your photo seems to be corrupted - won't load.
Those metal bars might be for attaching the bottom panels.
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Jim Lassen
I would also like to thank you for sharing your years of wisdom.
It's guys like you that make this forum as useful as it is.
Richard
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Jim,
You and Andy (who used to work on my desk in the UK) are a treasure here. I continue to get educated by you guys on this valuble resource.
Thanks for all you guys do!
Mike Trimble
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Mike Trimble, thank you for your kind comments.
You mentioned that me and Andy Henderson worked on your console in the UK. Is this the one that came from Komplex Studio in Bristol (South West UK?). I worked on that one with George Gilbert (ex SSL test engineer) and Andy was also involved in the studio belonging to David Francolini (now in France).
I have so much info about the old SSL's which I will try to post on here at some point, when I have the time.
Anyone is welcome to contact me and have a chat (Whatsapp etc) about any issues as talking is quicker than writing and I can't type quickly!
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Question about the bar graph meter:
I'm almost done with all the wiring!
A small loom is somewhat unclear.
It's the 2x20 way ribbon cable from the bargraph motherboard (inside the external box) to the Center section.
The cables are marked "S66E" and "S118E".
In my original service manual's diagram, the top ribbon connector in the Center section (S18E) is connected to the 82E55 distribution board.
But in my Center section it is labeled 'S18E BARGRAPH'.
Between 'S17E' and 'S19E' there is another Ribbon Connector (which is also not in my diagram) and is labeled 'S18E/82E55'.
Can I assume that the top ribbon connector is meant to connect the CS to the bargraph motherboard even though it's labeled "S18E" instead of "S118E"?
And the bottom connector 'S18Em/82E55 goes to the distribution board?
Can anybody confirm this?
That's the last thing I have to do before I can fire it up tomorrow!
Thanks,
Tilmann
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Jim,
Thats the one. My understanding was that it was put together for David by George from a larger console that belonged to Hugh Padgham's engineer, but I could be wrong. You guys did an amzing job of upkeep on it because it arrived in Denver, Colorado (now in Pennsylvania) and fired right up. I have had very few issues with it. If have any further insight on the desk, feel free to contact me at mmtrimble@gmail.com.
Thanks,
Mike
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Figured it out.
The topmost connector goes to the Bargraph Motherboard.
The bottommost connector goes to the Meter Distribution Card.
Question about the bar graph meter:
I'm almost done with all the wiring!
A small loom is somewhat unclear.
It's the 2x20 way ribbon cable from the bargraph motherboard (inside the external box) to the Center section.
The cables are marked "S66E" and "S118E".
In my original service manual's diagram, the top ribbon connector in the Center section (S18E) is connected to the 82E55 distribution board.
But in my Center section it is labeled 'S18E BARGRAPH'.
Between 'S17E' and 'S19E' there is another Ribbon Connector (which is also not in my diagram) and is labeled 'S18E/82E55'.
Can I assume that the top ribbon connector is meant to connect the CS to the bargraph motherboard even though it's labeled "S18E" instead of "S118E"?
And the bottom connector 'S18Em/82E55 goes to the distribution board?
Can anybody confirm this?
That's the last thing I have to do before I can fire it up tomorrow!
Thanks,
Tilmann
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My console is 15 years newer than yours but on my console the wires that were labeled Y were the Group Monitor Returns. These are Yd from the tape machine send row H. The one under Group Outputs. This is what you hear when you press the ready group button. Their corresponding Bicc is labeled H.
Richard
Found a page in the Service Manual (Tuchel Connector Summary) that says 'H+Y'.
So this seems to be connected correctly.
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Your photo seems to be corrupted - won't load.
Those metal bars might be for attaching the bottom panels.
I hope you can see it now, still no idea what it's for...
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So, the basic setup is done, the console booted up and the voltages set.
- I noticed that the +V rail draws about 1A more no matter how many buckets are switched on.
Is that something to worry about?
- Also, I noticed that there is no P48 switch on the channel strips (like every E-series) but the gain pot with the P48 switch is a rotary switch in my console (on each channel).
Could this have been a special request from Danish Radio?
There is an retrofit switch in the center section to disconnect the 48V at the connector panel so all channels have/don't have P48.
Next week I will connect all the tuchel connectors to the patchbay and protools and start testing the console...
Thanks for your help!
Tilman
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So the console is now connected to the patchbay and to the Pro Tools converters.
Just did a short test, but then had to go.
Oscillator feeds all group outs into pro tools, works fine.
Pro Tools out feeds the line In, only works half...
When I raise the faders, the signal only hits the right side mix bus.
Can see it in my MTRX input.
The bus compressor also doesn't react when I pan a signal to the left side.
Tried it on multiple channels.
Any ideas where to look first?
Thanks,
Tilmann
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Check to see if you have both channels coming through at the Pre-VCA patch points.
If not, check the S5E ribbon connector which will run from the 651 centre section, to the left side of the console, then continue to the right side.
Clean and reseat.
I have had no end of hell with these over the last few weeks.
Anthony.
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Thanks Anthony, will check that tomorrow!
(Didn't checked any channels at the right side of the Center Section yet).
Tilmann
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Check to see if you have both channels coming through at the Pre-VCA patch points.
If not, check the S5E ribbon connector which will run from the 651 centre section, to the left side of the console, then continue to the right side.
Clean and reseat.
I have had no end of hell with these over the last few weeks.
Anthony.
Hi Anthony,
just checked the Pre VCA Patch Points.
No Signal at LF, no Signal at RB...!
Cleaned and reseated the Ribbon Cables wich are connecting the Bus cards to the Center Section, no luck.
Its on Both sides of the Center Section.
Could this be a short in a channel...?
Thanks,
Tilmann
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Patch from your pre VCA send LF into the return of the pre VCA RF return and see if you now see signal from LF and RF at the center section. This will tell you if that part of the signal path is working.
I doubt it's a short in a channel but you could always disconnect the ribbon from the left side feed to the 651 and then the right side feed and see if the fault follows a side. It could be wiring since you just connected up your patchbay. It could also be a card in the 651. See if you can find in your schematics where the pre VCA patches leave the 651 and reseat that card. My 651 is very different from yours or I'd look it up for you for you.
Richard
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ok, after a week of mixing back to the Console...
I made a nice Panel for all the Tuchel connectors, so they are all held in Place. No chance of pins touching each other or touching ground.
- I patched from pre VCA send LF to pre VCA ret RF, no signal on the left side.
- I changed the Ribbon cables, still not working.
- When I switch on the Osc to quad Bus, there is level on the left side (probably not going to the QB Mix Amps).
- Tried Float, small Fader to QB routing, no signal on the left side.
- Changed all the QB Mix Cards CF82E26) back and fourth, no Signal on the left side (all 4 cards are working fine)
I noticed that there is a unused S5E Ribbon connecter on the Mainboard of the Center Section, right above the QB mix Amp cards.
Is this supposed to be connected to something. So far I couldn't find any Information in my manual...
I don't know how to proceed now... :-\
EDIT:
I adjusted the Voltages again with all Channels in, it only reads 16,8v & 17,2v
I cannot go higher with the Voltages, the trimmer are already at maximum (MPower System PSU)
Will cut down the Power Cable, its 9m too long...
Thanks,
Tilmann
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Sooo, cut the Power cable, now I have +/-18vdc.
Still no luck with the left front Quadbus...
I disconnected all of the short interconnect Ribbons between the Buscards (S3E-S9E),
disconnected the ribbons of the right side of the console from the Center Section.
So only 1 set of upper/lower Buscards and the S5E is connected to the center Section.
Only 1 Channel is in that bucket on that Buscards.
Still no LF Signal!
swapped the 82E26 cards again, nothing changed.
Any Ideas...?
Thanks,
Tilmann
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Try cross patching from the pre VCA sends and returns again. Feed R send into left return and see if you get left on the meters. Or you could just patch the Osc into the Pre VCA returns and see if you get signal. If you have access to an O scope you could look for the sine wave on pin 5 going into the 26 card and pin 10 leaving the 26 card to the patch point "pre VCA send" That way you could tell if it's getting lost before or after the 26 card. You could also try measuring continuity with an ohm meter between pin 10 of the 26 card and the patch point tip and pin 9 of the 26 card and the patch point sleeve. Compare your right 26 card slot to your left 26 card slot. You can get to the pins on the back side of the 651.
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Hi Richard,
That was exactly what I did this afternoon.
Tracked the signal with a scope.
First i checked the ribbon S5E for continuity, was all fine.
Then i checked pin 1 in the lower buscard and pin 5 on the QB mix amp for continuity, all fine.
Signal was present at pin 5 (mix amp in) and 10 (pre vca send) but not at 12 (pre vca return).
So I checked the cables to the patchbay again.
Some wires were not properly attached to the tuchels. Was hard to see.
But that was the fault, now it works!
Then I found the next fault.
On one QB mix am Card the Compressor cannot be switched on.
Just had a quick look at the schematic, could it be TR3?
Thanks for your effort to study the schematics!
Thanks and have a nice weekend!