Brother International FAX-1010 Service Manual - Page 32

FAX1570MC/1030/MFC1870MC/1970MC.

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3.2 Main PCB The main PCB, which is the nucleus controlling the entire operation of the equipment, consists of a FAX engine (ASIC), memories, MODEM, motor drive circuitry, sensor detection circuitry, and analog circuits for scanning, recording, and power transmission shifting. D NCU 0 Power supply 0 Speaker D Modular PCB (for PC I/F) D Hook switch 0 sensor* Sensors ROM E2PROM = DRAM FAX engine (ASIC) Control panel Motor driver Recording head CIS Motor Sensors 0 Ni-MH battery 0 Microphone Not provided on the FAX1010 or those versions equipped with a Binatone handset E2PROM: Electrically Erasable Programmable Read-only Memory DRAM: Dynamic Random Access Memory Block Diagram of Main PCB On the following pages, the main PCB circuit diagrams are described on the basis of the FAX1570MC/1030/MFC1870MC/1970MC. III - 20

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3.2
Main
PCB
The
main
PCB,
which
is
the
nucleus
controlling
the
entire
operation
of
the
equipment,
con-
sists
of
a
FAX
engine
(ASIC),
memories,
MODEM,
motor
drive
circuitry,
sensor
detection
cir-
cuitry,
and
analog
circuits
for
scanning,
recording,
and
power
transmission
shifting.
ROM
Control
panel
NCU
Power
supply
Speaker
Modular
PCB
(for
PC
I/F)
Hook
switch
sensor*
Sensors
Not
provided
on
the
FAX1010
or
those
versions
equipped
with
a
Binatone
handset
D
0
0
D
D
0
E
2
PROM
=
DRAM
FAX
engine
(ASIC)
Motor
driver
Sensors
Recording
head
CIS
Motor
0
Ni-MH
battery
0
Microphone
E
2
PROM:
Electrically
Erasable
Programmable
Read-only
Memory
DRAM:
Dynamic
Random
Access
Memory
Block
Diagram
of
Main
PCB
On
the
following
pages,
the
main
PCB
circuit
diagrams
are
described
on
the
basis
of
the
FAX1570MC/1030/MFC1870MC/1970MC.
III
-
20