Epson AcuLaser C1900 Service Manual page 120

EPSON AcuLaser C1900/AcuLaser C900
<AcuLaser C900>
PRINCIPAL FEATURES
Host-based printer controller using ESC/PageS-Printing System as the
language
Engine specifications: A4, 4 ppm for color / 16 ppm for monochrome, 600
dpi, duplex printing available as an option
NEC-made VR4305 employed as the CPU
HTC employed as the new memory + I/O + image processing integrated ASIC
16 MB of RAM as standard. A maximum of 144 MB available with optional
RAM
Parallel interface (Compatibility/Nibble/ECP) and USB 1.1 interface mounted
as standard
1 channel of Type B slot for an optional interface
(Only Leo2 supported)
Network by Type-B
Color image processing functions (CPGI and CRIT) incorporated
48 MHz bus frequency
Operating Principles
The following is the C494MAIN board block diagram.
Figure 2-32. C494MAIN Board Block Diagram (AcuLaser C900)
Controller Board Operating Principles
Revision B
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