Epson ActionLaser 1600 Service Manual page 50

Printer Features
C 1 2 5 M A I N B o a r d
The C125 MAIN board is the video controller board, which functions to receive
print data from host, generate the print image (video), and send the print image to
the engine controller via the video interface. A 32-bit, 17.6 MHz SPARKlite
MB86930 RISC CPU is used in location IC1, and the following memory chips and
custom ICS are assigned to the 4GB memory space.
Memory chips
Code ROMs:
four 4Mbit EPROMs (IC7, 8, 15, 18) or
two 8Mbit mask ROMs (IC21, 22)
Font ROMs: two 8Mbit mask ROMs (M80A74: IC4; M80A75: IC5)
4Mbit DRAMs (IC16, 17, 19, 20)
16Kbit EEPROM (IC8)
Custom ICs
ASIC E05A91 (IC9)
ASIC E05A92 (IC25)
ASIC E05A93 (IC24)
Others
RS-232C interface driver/receiver ADM232 (IC28)
RS-422 interface driver/receiver MC34050 (IC6)
Reset IC M51953BFP (IC27)
1-46
Figure 1-17. C125 Main Board
EPSON ActionLaser 1600 Service Manual