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FAX-L1000 Chapter 5: Appendix
e) Components
Video controller circuit receives print data consisting of code or image data from external
device (such as host computer) via interface cable.
The circuit analyzes and processes the print data including the data specified by the
operation panel, and then converts them to the dot data. The dot data are sent to the ECNT
board to control the laser diode emission.
The layout of the main ICs on this circuit is in Figure 5-93, and the block diagram in Figure
5-94.
CPU (IC1)
A 32-bit RISC microprocessor (FC80960HD) made by Intel co. is used for the CPU in the
printer, and its operation frequency is 50MHz. The CPU controls the operation of the PDL
board according to the control program stored in the ROM.
ASIC (IC2)
The ASIC is graphic co-processor and has the following functions.
•DRAM control
•ROM control
•Video interface control
•IEEE 1284 parallel port interface control
•I/O bass interface support
ASIC (AIR, IC3)
The ASCI has smoothing control circuit and SRAM.
Its main functions are as follows.
•Smoothing control of image
•EEPROM control
•Operation panel interface control
DRAM
4-Mbyte DRAM is installed on the PDL board.
72pin-DIMM of 4-, 8-, or 16-Mbyte can be installed to the two slots on the PDL board.
ROM
A 4 Mbyte ROM is installed on the PDL board. In some cases, the 4 Mbyte ROM is
installed on the firmware ROM DIMM. In those cases, this ROM DIMM is installed in the
connector (J6) on the PDL board.
Of the three connectors, the two connectors, one in the middle (J7) and the other one at the
bottom (J8), can be used by the user to install 4 Mbyte or 8 Mbyte ROM DIMM. The
optional FAX-L1000 PostScript Kit is installed in the middle connector (J7). The bottom
connector (J8) is not used. The connector at the top (J6) is exclusively for the Firmware
ROM DIMM.
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