Brother International FAX 275 Service Manual - Page 29
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UPC - 012502564546
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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. 0 NCU Power supply 0 Speaker Mic** 0 0 0 Automatic cutter ROM E2PROM SRAM * DRAM ** FAX engine (ASIC) o Control panel a Recording head ciCIS Motor driver a Motor Sensors Ni-MH battery ** 00 PCI** E2PROM: Electrically Erasable Programmable Read-only Memory * Provided on the FAX255/FAX275/FAX-515/HOMEFAX3 ** Provided on the FAX355MC/FAX375MC/FAX-525DT/FAX-525MC Block Diagram of Main PCB III -18
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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.
NCU
Power
supply
Speaker
Mic**
Automatic
cutter
0
0
0
0
0
ROM
E
2
PROM
SRAM
*
DRAM
**
FAX
engine
(ASIC)
Motor
driver
Sensors
o
a
ci
a
0
0
Control
panel
Recording
head
CIS
Motor
Ni-MH
battery
**
PCI**
E
2
PROM:
Electrically
Erasable
Programmable
Read-only
Memory
*
Provided
on
the
FAX255/FAX275/FAX-515/HOMEFAX3
**
Provided
on
the
FAX355MC/FAX375MC/FAX-525DT/FAX-525MC
Block
Diagram
of
Main
PCB
III
-18