
III –
20
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
E
2
PROM
FAX
engine
(ASIC)
Motor
driver
Sensors
Recording head
Control panel
Motor
CIS
DRAM
Speaker
Power
supply
NCU
Modular
PCB (for
PC I/F)
Hook
switch
sensor*
Sensors
E
2
PROM:
Electrically Erasable Programmable Read-only Memory
DRAM:
Dynamic Random Access Memory
Microphone
Ni-MH battery
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.
** Not provided on the
FAX1010 or those
versions equipped
with a Binatone
handset
Summary of Contents for MFC 1870MC
Page 4: ...CHAPTER I GENERAL DESCRIPTION ...
Page 10: ...CHAPTER II INSTALLATION ...
Page 11: ...CHAPTER III THEORY OF OPERATION ...
Page 43: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 94: ...CHAPTER V MAINTENANCE MODE ...
Page 101: ...V 6 Scanning Compensation Data List MFC1970MC Scanning Compensation Data List Other models ...
Page 148: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...
Page 191: ...D Power Supply 100 120V U S A CANADA TAIWAN ...
Page 192: ...D Power Supply 200 240V EUROPE SOUTH AMERICA ...
Page 193: ...D Power Supply 200 240V GULF ASIA CHINA ...
Page 197: ......
Page 203: ......
Page 206: ......