Ricoh fax180 - 2.3. PCBs

2.3. PCBs
2.3.1. FCU
1. FCIP (Facsimile Controller and Image Processor)
• CPU
• Modem (V.29, V.27, V.21)
• Data compression and reconstruction (DCR)
• Digital image processor (DIP)
• Laser interface (LIF)
• DMA controller
• Clock generation
• Stepper motor control
Contact
Image
Sensor
Amplifier
System
ROM
(4MEPROM)
System RAM
(SRAM)
DATA/ADDRESS BUS
Video
SRAM
Drivers
Thermal
Head
Thermistor
Tx
and
Rx motors
Operation
Panel
Sensors
Jam Sensor /
Paper End Sensor
Speaker
NCU
Handset
Control Signals
DRAM
Working
RAM
ECM/SAF
Memory
FCIP
MDM
CPU
RU8
DCR CKG DIP LIF
DC-DC
Converter
Amplifier
/ Filter
PSU
RTC
Cutter
FCU
H068D506.wmf
August 7th, 1995 DETAILED SECTION DESCRIPTIONS
PCBs
2-12