[sdiy] EMS Synti AKS - questions regarding configuration & rare silicon

[RMC]

Hello

Both of the synthi As are now repaired; one has a fault with the envelope 
shaper and the other is fine. They both need a bit of calibrating but that's 
about it.

However, the KS parts are another story. The K ("keyboard") parts both work 
but the S ("sequencer")  parts don't seem to be fully operational. Trouble 
is, I don't have an instruction manual so I can't be sure I'm patching the 
sequencers properly or adjusting the controls.

Can anyone tell me how to configure the synthi A to accept the sequencer? I 
note that the "vertical" joystick control has an arrow showing "sequencer" 
for fully CCW. Both of my AKSs are MkII units - both have prestopatch 
sockets.  I don't know how to configure the matrix or the controls on the A, 
or the controls on the KS.

Secondly - when the KS is running, the PMOS shift registers (MF7104 on one 
or MF50052T on the other) get very hot - too hot to touch for longer than a 
second or so.  The scant data I do have tells me that the max. power 
dissipation = 500mW. That seems a lot for a TO-100 can!  The PSU on the KS 
is fine - the V out from the LM309 is 5V.  Does anyone have a KS who can 
tell me if theirs get very hot too?

However, in spite of the heat (problem?) the sequencer does seem to do 
*something* - I can tell it to "record" and then tap in a sequence of notes. 
The  rhythm of the programmed notes plays back but not the pitch. Hence my 
concerns that I've configured things incorrectly!

I hope someone can help - I've looked for a copy of the instruction manual 
online and, whilst I have found the "synthi educational handbook", I believe 
it refers to the MkI synthi A and so far I haven't had too much luck copying 
its recommendations. Perhaps I'm just being a bit obtuse.

Cheers

RMC, England