Casio CZ-1 - Page 122

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PCO
MIDI
CLOCK
MIDI IN
MIDI
OUT
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PCB-
MA3M PCB
Serial
data
informations
from other
instruments
comes
in
from
MIDI-IN
terminal
and
enters
MAIN
CPU's
PC1
terminal via
photo
coupler
PC900.
Thus,
CZ-1
is
not
electrically connected with any
external
instruments
to cut
electric noises.
Input
signal
also goes out
MIDI THRU terminal
through
a
photo
coupler
and two
inverters.
MAIN
CPU transr-
's
MIDI
data
from
PCO
terminal.
-58-