Overall Machine Control - Ricoh MV310 Service Manual

May 22nd, 1995

1.4. OVERALL MACHINE CONTROL

Page
Memory
Optional
100 Sheet
Cassette
FDU
FCE
FCE
Energy
Optional
Saver
Printer I/F
CPU
DC-DC
PSU
Converter
Fusing
NCU
Lamp
Handset
The FCE (Facsimile Control Engine) board contains the FCIP (Facsimile Con-
trol and Image Processor), DRAM, SRAM, System ROM, and video
processing memory, and it controls the entire system through the FDU (Fac-
simile Driver Unit) board.
There are two cpus in the machine: the main cpu (FCIP) on the FCE board
and the energy saver cpu on the FDU board. In energy saver mode, the main
CPU switches off and the energy saver CPU takes over.
The FCIP consists of the following component blocks:
•
RU8 CPU - Main CPU
•
LIF- Laser Interface
•
PRIF - Printer Interface
•
DCR - Data Compression and Reconstruction
The 4 MB DRAM contains the SAF memory, ECM buffer memory, work area,
and page memory. For B4 size copies at 16 x 15.4 dot/mm resolution, a page
memory IC card is installed. A rechargeable battery backs up the DRAM for
one hour.
The system ROM uses a 512 KB (4 Mbits) flash ROM. Software in this ROM
can be rewritten from the IC card slot or by RDS.
DRAM
System ECM/SAF
RAM Memory
DATA/ADDRESS BUS
CPU
MDM DMAC
RU8
FCIP
Control
Signals
Hybrid IC
External I/O (EXIO)
(HIC)
Driver
Power Optional
Speaker
Pack Counter
OVERALL MACHINE INFORMATION
OVERALL MACHINE CONTROL
RS232C I/F
Page
Memory System System
ROM RAM
(Flash) (SRAM)
DCR DIP LIF
Drivers
(FPD)
Scanner Operation
Panel
and
printer
components
and
sensors
•
MDM - Modem
•
DMAC - DMA Controller
•
DIP - Digital Image Processor
1-13
Optional
Video
SRAM
PRIF
Thermistor
Amp
PSIF
Driver
Sensors
Book scanner
components
Paper
and
feed
ADF sensor
motor
H521V506.wmf
LDDR
Contact
Image
Sensor
ADF
and
book
scanner
motors