Ricoh 5510L - Page 276

14 June, 2002 PCBS
6-41
Detailed
Descriptions
The FCU is the machine’s main controller. It controls scanning, printing, fax
operation, image processing, power mode switching, and it interfaces with the user
and all standard and optional peripherals. It holds the FROM. SRAM, and DRAM,
and provides the slot for the optional memory card.
NCU (Network Control Unit). Controls the network functions.
OPIF Board (Option Interface Board). Provides multiple ports for interface
between the FCU and the optional boards. The OPIF contains the NCU, NSG3,
JPU (JPEG Unit), SIG4, Expansion board and NICF.
• NSG3 (G3 Unit). G3 Interface Unit Type 510
• JPEG Unit. Included with the NICF (NIC Fax Unit Type 510).
• SIG4 (ISDN Unit). ISDN G4 Interface Unit Type 510
• Function Upgrade Kit (40 MB Memory). Feature Expander Type 300 40M
• Function Upgrade Kit. Function Upgrade Kit Type 510
• NIC-F (Network Interface Card for Facsimile). Provides a standard fax
IEEE802.3/IEEE802.u LAN interface and uses a CPU to effect protocol
processing.
FCU (Facsimile Control Unit). The main board contains the following main
components:
• SPCP2 (Ru30 CPU) • Communication Analog Circuits
• VPL • MBU
• CIOP • Backup Circuits
• Energy Save Circuits • Interfaces for each electrical component
• Modem (V34) • Drivers
The FCU controls the following vital functions:
• Scanning • Operation panel and operation panel
interface
• Printing (plotter) • Dual access (CPU/DMA buses)
• Fusing temperature • Communication and data transfer
• Image processing • Energy save mode
• Data compression and
reconstruction
• DRAM backup
• Analog signal processing • All options
• Memory
PSU (Power Supply Unit). Controls the DC power supply the machine.
SAF (Store and Forward) Backup. Backs up DRAM for up to 12 hours if a power
failure occurs while data are being stored in the SAF.
SLB. Displays the ADF status. Monitors the status of the ADF unit. Lights red when
the ADF unit is open.
OPU (Operation Panel Unit). Interfaces with the CPU and runs the operation
panel for the user interface.