Epson Stylus Photo 820 - Main Elements

EPSON Stylus PHOTO 810/820 Revision A
Operating Principles Electrical Circuit Operating Principles 46
2.2.2.1 Main Elements
Table 2-8 shows the function of the each main elements on C418 Main/Maia-B board.
Table 2-8. Main elements
IC Location Function
CPU
E01A21CB
(E01A21CA)
IC1
CPU mounted on the MAIN board is driven by clock
frequency 48 MHz, 24MHz and controls the printer.
DRAM IC4 Bus= 16 bit, 4Mbit DRAM
EEPROM IC3
1kbit EEPROM
• Default value setting
• Parameter backup
Reset IC
BN6150F-E2
IC2
Reset IC
• For +5V; reset when +4.2V is detected
• For +42V, reset when +36.3 V is detected
Common Driver
E09A29LA
IC19
Head drive control HIC
• Generates head common voltage.
Motor Driver
(LB1946-K)
IC10/IC11 PF/CR motor drive IC
Parallel I/F IC
74LVX1612B4
IC7 IEEE1284 parallel I/F transceiver IC.