MAIN PCBS
B044/B045/B046 6-8 SM
6.5 MAIN PCBs
6.5.1 FCU (FUNCTION/FACSIMILE CONTROL UNIT)
The FCU is the machine's main controller. It controls scanning, printing, fax
operations (B046 only), image processing, power-mode switching, and it
interfaces with standard and optional peripherals and with the user. It holds the
machine's FROM, SRAM, and DRAM, and provides the slot for the optional
DIMM. Note that fax-related components are not included on FCUs that ship on
models B044 and B045.
Flash
Memory
Card
DIMM NCU
Monitor
Speaker
Speaker
Driver
Analog
Data
Processing
MODEM
3V/5V
Converter
FROM SRAM DRAM
SCP2
Energy-
Save
Switching
Reset /
Backup
SAF
Backup
OPU
VPL CIOP
Heater
Control
Power Pack
Control
Scanner
Driver
Plotter
Driver
LDDR SBU Power Pack
ADF/
Scanner
Plotter
Optional
Paper Tray
Unit
Mechanical
Counter
Printer Controller
NIC Board IEEE1284
PSU
Power
Supply
Unit
Tray
Heater
CPU BUS
DMA BUS
FCU
: B046 only
: Option
: Standard
Video
Processing
Circuit
Note: Mechanical counter is standard on B044 and B046.
B046D553.WMF
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