Sequential Circuits "Six Trak"

[LoFi-Ninja]

My Sequential Circuits "Six Trak" is not making any sound ! 

I'm having trouble figguring it out.

Here's the schematics of it (link directly to PDF file) http://www.synthfool.com/docs/SequentialCircuits/Six_Trak/Sequential%20Circuits%20Six%20Trak%20Schematics.pdf

Could you help me identifying any amplifying chips..

[Gordonjcp]

Try googling the numbers on the chips...

[LoFi-Ninja]

Ahh lol.. I just plugged the keys reversed into the MB.. It works fine. 

[Gordonjcp]

Whoops!  No, I've never done anything like that... ;-)

Handy hint - if you put the keyboard rubber back into a Yamaha DX21 back to front, when you play a C the B an octave up sounds too.

[natere2ster]

LOL,

I did the exactly same thing with mine!  I freaked for a minute then figured it out too!