[HomeBrew] Help moto-CQM5112 Synthesiser Schematics

[rui xisto]

Greetings
I need some help in getting the schematic off the synthesiser board off 
this equipment, or any off the 5000 series, I have the manual but only 
for some crystal operated boards versions.
The synthesiser board version I have is m905042p1 rev .8, I need to 
program the Prom (82s23) or change it for an EPROM but I need the 
schematics, any info on the subject would be appreciated.

Rui