Epson AcuLaser C900 - Page 121

EPSON AcuLaser C1900/AcuLaser C900 Revision B
Operating Principles Controller Board Operating Principles 121
CONSTITUTION OF MAIN CONTROL CIRCUIT BOARD
 Main Board Assy: C494 MAIN
 Memory Board Assy: C468 PROG (IPL, Code)
SPECIFICATIONS
Table 2-17. Major Elements
Name Location Remarks
CPU IC100 VR4305-80
HTC
IC101
E05C01BA
Memory control and I/O control integrated
ASIC
ROM DIMM
CN300
ROM/RAM mixed slot (1 slot)
2or4MB PROG (IPL, Code)
SDRAM
DIMM
Standard
CN200
1 slot. Max.144MB
16,32,64,128MB (Standard:16MB)
Optional CN201 1 slot. 16 ~ 256MB
EEPROM IC102 2kbit 93C56
PWM
IC600
IC for pulse width modulation for connection
to HTC
SSCG IC500 Clock driver