JUKI 6100 Technical Manual page 55

Fig. 7.7
illustrates
the
power-on and power-off timing
relationship
between
the
+5 and
+30
volt lines.
The
reason for the delay
in
turning the
+30
on and
off
is
to
prevent the
hammer
from
firing
during
power
on and
power
off
cycles.
+30V
+5V
ON
I
I
I
I
I
—
I—
-Vr
OFF
I
I
I
Fig.
7.7
Fig.
7.8
is
the
schematic diagram of
the
+24
volt regulator circuit.
Transistor
Q3
and
Resistors
R7
and
R8
from an
emitter-follower
circuit
which
supplies Q4,
Q5
and IC1 with the necessary biasing
signal to
keep
the
+24
volts at a
constant
level.
Capacitor
CI
6 acts to further
filter
the
output and
Rll
acts as a
combination
load
and bleeder
resistor.
The
output of
the
+24
volt
regulator
is
nto sequence
sensitive.
© ©
:R7
R9
R8
Q4
R10
Q5
C14
IC1
78L24
4
4?
"*C16
C15
J41
5
6
:R
1
+24
GND
Fig.
7.8