beginner's question

[Gronda Andrea]

Hello, I've to check this thing (4558) by a low budget DMM:
            ______
OUT A -|1    8|- +Vs
   -IN A -|2    7|- OUT B
  +IN A -|3    6|- -IN B
    -Vs   -|4    5|- +IN B
               ------
Where have I to put the red and the black probes to check if it's alive
or dead?
What should  I read on DMM display?
Similary is it possible to do the same operation to check diodes and
transistors, soldered on the PCB?
I'm going  to fry my synth?

Thanks.

Andrea.