Help with Alesis SR-16

[mdmckee]

I have an old SR-16 from 1990 can anyone help me with getting the schematics for it? I have reset it but it still sounds distorted and volume selector not working properly.

[Circuitbenders]

clean the volume pot with some contact cleaner?

I don't think the service manual exists in the wild, at least i've never seen it.

Did the SR16 exist in 1990? Thats terrifying! 

[elcubano53]

http://elektrotanya.com/alesis_sr-16_v1_04_roms.zip/download.html
i found this?