Amek BC2 BCII Buss Assignment Routing

Graham Langley founded Amek in 1973 with Nick Franks. Since then, AMEK and TAC recording consoles have been the choice of demanding audio professionals for over 25 years.

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Amek BC2 BCII Buss Assignment Routing

Postby trodden » Thu Dec 07, 2017 9:54 pm

Hello.

In the process of refurbishing an AMEK BC2. I want to add more channels for mix down, so I purchased a handful of BC 1118/4's. One of them I popped into frame and good to go. However, the other three have a different buss routing option. While the modules that came with my console and the one stereo input module that works has buss assignment buttons "In" (for the panning pot), "1-2", "3-4", and "ST" and "Mute". While these other three stereo input modules have "1", "2", "3", "4", and "Mute". There is no "ST" button to route the input to the stereo buss. While I can route to sub groups 1-4, I'm using those already for mix down inputs and would like to route to the stereo buss like all the others can.

Since these consoles were pretty much made to order, seems that these modules could easily be configured and then reconfigured depending on needs. I can't seem to find any type of jumper or such that differs between the stereo module with the "ST" buss option and the ones without.

Please help!

Thank you.
Brandon

Attached is a picture of the two difference stereo input modules, BC 1118/4's
Attachments
Buss Options.jpg
trodden
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Re: Amek BC2 BCII Buss Assignment Routing

Postby trodden » Thu Dec 07, 2017 10:46 pm

Found some SEVERELY OVERLOOKED INFO on the BACKSIDE of the "weird" module. Thinking if I pull the brown wires to make it match the working one, maybe will be in business?
Attachments
IMG_2268.JPG
trodden
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Re: Amek BC2 BCII Buss Assignment Routing

Postby trodden » Fri Dec 08, 2017 1:34 am

Well, pulled the brown wires and in the process noticed that the mod to these also involved breaking some traces as well by scratching/scraping the trace to break the circuit.

Tried going around the broken traces with some fine wire (red wire in photo). Got all of them worked out, inserted the channel strip into the console and could faintly hear my tones I was sending and the buss selector switches were now working as I needed. Pulled out the module, did some more inspecting to see what I missed and found two more VERY FINE traces that had been broken for the mod as well. Couldn't find a way to tie those paths back together unfortunately. I'm guessing that may be where the failure is currently happening. I tried getting some fine wire and solder in there but ended up ****ing up the board even more. Game Over. I'm done. It was a learning experience though. Cost me a channel strip/$100.

The seller I got these four channel strips from has found two more with the "ST" stereo buss selector like the one I received from him that works for me. I'm hoping I can trade out the remaining two for those two.
Attachments
FullSizeRender (6).jpg
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