Vintage Synth Repair

Hi,

I just bought a kr 55 and it seems that the trigger out function isnt
working correctly, I plugged a cable into the out on the KR and to the
arp in on my polysix, latched an appegio started the kr and nothing
happened, i thought maybe the voltage wasnt correct so i tried it with
the seq trig in on a jx3p, still nothing. When i flipped the trig
select switch on the kr around it would sometimes trigger the jx3p
during one of the switches but would not sync with the actually sounds
from the kr. Sooo, my question is.. does anyone have schematics or a
service manual to the kr55, or would anyone know where i should even
start testing? Also I'd like to do a trigger in mod too, if anyone
know s how or knows a resource on the web it would be much appreciated!

Thanks,
Ian