Gestetner A265 Service Manual page 580

PCBS
FACE (Fax Application Control Engine)
• CPU
• Data compression and reconstruction (DCR)
• DMA control
• Clock generation
• DRAM backup control
• Ringing signal/tone detection
• Video and command interface to the BiCU (VIF)
Modem (Rockwell R288F)
• V.34, V33, V17, V.29, V.27ter, V.21, and V.8
ROM
• 2MB (16 Mbit) flash ROM for system software storage
DRAM
• The 8 MB of DRAM is shared between SAF memory, ECM buffer, page
memory, working memory, line buffer, and so on.
• The SAF memory (2MB) is backed up by a rechargeable battery.
SRAM
• The 128 KB SRAM for system and user parameter storage is backed up by a
lithium battery.
Switches
Item
Determines which firmware the machine boots from. If the switch is OFF, the
SW1
firmware on the FCU inside the machine is used. If the switch is ON, the
firmware on the flash memory card or external FCU is used.
SW2 Reset switch, to reboot the FCU board
SW3 Switches the SRAM backup battery on/off
A265/A267
CÓPIA NÃO CONTROLADA
Description
2-26
CÓPIA NÃO CONTROLADA
SM