Assembly of a early E Series Console QUESTIONS

[tlmaen]

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

[tlmaen]

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

[horizonsound]

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.

[tlmaen]

Thanks Anthony, will check that tomorrow!
(Didn't checked any channels at the right side of the Center Section yet).

Tilmann

[tlmaen]

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

[Richealey]

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

[tlmaen]

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

[tlmaen]

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

[Richealey]

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.

[tlmaen]

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!