Ricoh B264 Service Manual page 422

BOARD STRUCTURE
ASCI Trumpet. Contains the dedicated R2K controller chips of the shared
resources (the CPU, memory, and HDD hardware) for the copying and printing
functions.
• CPU (RM7035C-466) The central processing unit that controls the operation of
the controller board.
• HDD. The interface for connection of the flat film cable connection to the HDD
unit. The hard disk is mounted on the controller board.
• SD (Bootable C3). Service slot for firmware version updates, moving
applications to other SD cards, and downloading/uploading NVRAM contents.
• DDR SDRAM. The image memory for the printer function where image
compression, image rotation and other operations are done.
ASIC Shaker. Controls the following functions: USB, Ethernet, PCI (optional
boards for Bluetooth, FireWire, Wireless LAN, and Centronics), debug serial, I2C,
applications on SD cards mounted in SD card slots C1 and C2, and the energy
save features.
• SD. This is the interface for SD card slots C1, and C2. C1 is for the
Printer/Scanner B783. C2 is for PostScript3 B720 or Data Overwrite Security
B735.
• Board Option Slots 1, 2. Only one of the following options can be installed in
either Slot 1 or Slot 2: IEEE1284 Interface Board B679 (Centronics),
IEEE802.11b G813 (Wireless LAN), IEEE1394 Interface Board B581 (FireWire),
Bluetooth Interface Unit B736. The following options can also be installed in
either slot: File Format Converter B609 (MLB), and Key Browser Unit B720
• Flash ROM. Stores the program. Maximum capacity: 32 MB.
• USB. The interface for USB 2.0 devices. Supports both low-speed and high-
speed modes. USB support is built-into the controller. No installation is required
for the USB function. But, SP5895 001 must be set to "1" to enable the network
functions.
• NIB. The Ethernet interface connection. Network support is built-into the
controller. No installation is required for the network function. But, SP5895 002
must be set to "1" to enable the network functions.
• EEPROM. Stores the data for the SP code settings.
• NVRAM. The memory that stores the system configuration and other information.
B264/B265 6-8 SM