Theory Of Operation; Power Supply - JUKI 6100 Technical Manual

7.
THEORY
OF OPERATION
7.1
Power
supply
The power
supply
in the
6100
consists
of
a
line
input
filtering circuit, voltage
jumpers,
power
transformer and
voltage regulation
circuitry
all
contained
in a
single integrated
unit.
Two
versiones
of the
power
supply
are available, the
first
is
designed
for use
in
the United
States
and Canada and
accepts input voltages
in the
range of from
100 to
120
volts
A.C., the second
is
designed for use
in
European
countries
and
accepts input voltages
in the ranges
of
from 220
to
240
volts
A.C..
Both power
supplies are designed
to
be used with
either
50
or
60
Hertz
line
input
frequency.
The
two
types of
power
supplies are
designated
by
a
group
letter,
"A
group" power
supplies are the 100/120
volt range
and "B group" power
supplies
are those for use with 220/240
volts.
The
chart
below
illustrates
the differences
in
these
two power
supplies.
Table
7.
Power
supply Input
voltage
Fuses
For
use
in
Fl
F2
"A" Group
100
to 120
VAC
1A 3A
United
States
Canada
(50 or
60
Hertz)
"B" Group
220
to
240
VAC
1A 3.15A
European
countries
The
line
input
filter
circuitry suppresses noises
which might by
present
on
the
incoming
AC
line.
The
filter
also acts to suppress
any
noises generated by
the
printer
from
being
induced back
to the
AC
input
line.
Fig. 7.1
is
an
illustration
of
the physical layout of the
filter
componetns.
The
filter
consists
of four
capacitors
and
three inductors.
The
schematic diagram of the
filter
is
shown
in Fig. 7.2.
0 0
©
1
®
2
©
3
C1
JP2
JP1
^\ o
C3
C2
L1
L2
L3
C4
PT
Fig. 7.1
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