Epson AcuLaser C1900 Service Manual page 121

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