Brother International HS-5300 Service Manual - Page 33

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1.7 Power Supply Unit The power supply unit generates several DC power sources from the AC power source. The DC power sources generated by the power unit are +5V, +25V, +52V, and +39/30V. The DC CHG signal switches the output between +39V and +30V. The power supply unit contains the AC heater ON/OFF circuit, which is controlled by the AC HT CTL signal. J 0 I co 0 I0 lI 0 < > CV I+.O 0 Z 0 > 0 > .C..., .. 10 0) > C+N (+,) I+.O 0 O ,_ aacs) a) 2 0 O-1 zO < „ ,0000, Fig. 2.16 II-14

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1.7
Power
Supply
Unit
The
power
supply
unit
generates
several
DC
power
sources
from
the
AC
power
source.
The
DC
power
sources
generated
by
the
power
unit
are
+5V,
+25V,
+52V,
and
+39/30V.
The
DC
CHG
signal
switches
the
output between
+39V
and
+30V.
The
power
supply
unit
contains
the
AC
heater
ON/OFF
circuit,
which
is
controlled
by
the
AC
HT
CTL
signal.
0
I
co
0
J
I-
0
l-
I
0
<
>
0
>
C
.,
0
+
>
.....
CV
10
0)
>
I.O
0
+
Z
CN
(,
+
)
I.
+
O
0
O
„
,0000,
O-
1
zO
,_
a)
c
a
s
a)
2
0
<
Fig.
2.16
II
-14