Brother International FAX-1010 Service Manual - Page 34

Circuit, Diagram

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... 1 • 0 !:.... ...... I. * A.Kg1.2. Main PCB Circuit Diagram 215 (D Connector for the power supply PCB which supplies 25V and 8V. (D 3-terminal regulator which eliminates unstabilized components of the +8V source to generate stabilized +5V source. ® Connector for the Ni-MH battery which supplies approx. 5V. (Provided on the FAX1570MC/1030/MFC1870MC/1970MC) ® 3-terminal regulator which generates +5B source from +8V to back up the DRAM (that stores received data). (Provided on the FAX1570MC/1030/MFC1870MC/1970MC) ® Connector for the motor ® Motor driver C) Connector for the clutch solenoid (that switches the power transmission). ® E2PROM (32-kilobit for the FAX1570MC/1030/MFC1970MC, 16-kilobit for other models.) ® ROM (2-megabit. Note that the qualification machines for demonstration have a 4megabit ROM.) C) DRAMs (1-megabyte, two 4-megabit chips) provided on the FAX1570MC/1030/ MFC1970MC. C) DRAM (512-kilobyte) provided on the MFC1870MC. The FAX1170/1270/1010/1020/ MFC1770 has its equivalent DRAM on location #7. III - 22

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„...,
.....
...
1
•
0
......
!:
....
I.
*
A.Kg1.2.
Main
PCB
Circuit
Diagram
215
(D
Connector
for
the
power
supply
PCB
which
supplies
25V
and
8V.
(D
3
-terminal
regulator
which
eliminates
unstabilized
components
of
the
+8V
source
to
generate
stabilized
+5V
source.
®
Connector
for
the
Ni-MH
battery
which
supplies
approx.
5V.
(Provided
on
the
FAX1570
MC/1030/M
FC1870
MC/1970
MC)
®
3
-terminal
regulator
which
generates
+5B
source
from
+8V
to
back
up
the
DRAM
(that
stores
received
data).
(Provided
on
the
FAX1570
MC/1030/M
FC1870
MC/1970
MC)
®
Connector
for
the
motor
®
Motor
driver
C)
Connector
for
the
clutch
solenoid
(that
switches
the
power
transmission).
®
E
2
PROM
(32
-kilobit
for
the
FAX1570MC/1030/MFC1970MC,
16
-kilobit
for
other
mod-
els.)
®
ROM
(2
-megabit.
Note
that
the
qualification
machines
for
demonstration
have
a
4
-
megabit
ROM.)
C)
DRAMs
(1
-megabyte,
two
4
-megabit
chips)
provided
on
the
FAX1570MC/1030/
MFC1970MC.
C)
DRAM
(512
-kilobyte)
provided
on
the
MFC1870MC.
The
FAX1170/1270/1010/1020/
MFC1770
has
its
equivalent
DRAM
on
location
#7.
III
-
22