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July 30th, 1996
2.4. PCBs
2.4.1. FCU
(Optional)
Working
IC Card
RAM
R144EFXL
Modem
Speaker
Hybrid IC
(HIC)
NCU
Option
Paper Feed
Unit
Printer
Components
The FCU (Facsimile Control Unit) contains the FCIP (Facsimile Control and
Image Processor), SRAM, System ROM, R144EFXL modem, and Video
SRAM.
The CPU core (RU8) in the FCIP controls the entire system of the machine.
The printer components are controlled by the CPU in the MCB. The FCIP and
the MCB are connected with a serial interface.
The modem inside the FCIP is used for Tone signal and DTMF generation
and reception, and V.21 communications. In addition, the Rockwell
R144EFXL modem is used for V.17, V29, and V27ter communications.
The SAF memory can be extended by 1 or 2 Mbytes with an IC optional card.
A 512 kB (4 Mbit) Flash ROM is used for the system ROM. Software in this
ROM can be rewritten from the IC card slot or by RDS.
DRAM
ECM/SAF
Page
Memory
Memory
System
ROM
(Flash)
DATA/ADDRESS BUS
Control Signals
MCB
Paper
M
PSU
Solenoid
Main Motor
2-29
DETAILED SECTION DESCRIPTIONS
FCU
System
Video
RAM
SRAM
(SRAM)
FPD
FCIP
Drivers
Amplifier
Fusing
Lamp
PCBs
Operation
Panel
OP-LSI
Scanner
Sensor
M
Tx Motor
Document
Solenoid
LED
Contact Image
Sensor
H528d500.wmf
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