How The Ga-1121 Operates - Toshiba digital copiers Service Manual

External devices
Networked
computers
PC for system
software
installation
1-2
1
Introduction

How the GA-1121 operates

The GA-1121 provides efficient image processing and printing control. The GA-1121
board includes a 850MHz Intel Pentium III CPU with a built-in floating point
accelerator that runs the PostScript Interpreter, which interprets the page description file
to produce the image pattern in memory. The EFI Fiery RIPChips
control data management and other system functions, freeing up the CPU for efficient
image data processing.
Image data is processed by the GA-1121, which sends the information to the copier.
Raster data is supplied to the laser in the copier at full copier rated speeds in order to
charge the drum and render the final image on paper.
One or more high-speed DIMMs (dual in-line memory module) on the GA-1121 board
hold image data during printing. The DIMM configuration is 256MB.
HDD
Network
interface
Parallel
interface
RTC/
PCI-ISA
Battery
GA-1121 functional diagram
F 1-2
IGURE
GA-1121 Assembly
GA-1121 Board
RIPChip
Flash
Memory &
CPU
Interpreter
Copier
interface
Super I/O
controller
Operation
Panel
interface
+12VDC and +5VDC
™
on the board
Copier
Copier
Operation
Panel
Display
Power supply
PCI Bus