hmmm
I can find the double tape deck version, but I'm looking for the 1978 version...
Type number: 1603...
EDIT:
And I am now a Silver member 
Double EDIT:
Didn't notice you wrote "SERVICE" manual.. it's the user manual I'm looking for 
BeoMaster 6500, BeoGram CD7000, MCP 6500, BeoLink 1000, BeoCenter 4000 (old version), BeoGram 1203