Epson Stylus Photo R390 - Components of Control Boards

EPSON Stylus Photo R260/R265/R270, R360/R380/R390 Revision B
Operating Principles Electrical Circuit Operating Principles 27
2.2.2 Components of Control Boards
Table 2-5. Components of Control Boards
Board Name
Incorporated Components
R360/R380/R390 R260/R265/R270
Main
Board
System
 Logic circuit
(ASIC incorporated in the CPU
core, Flash ROM x 2, SDRAM x 1,
DDR1 x 1)
 Logic circuit
(ASIC incorporated in the CPU
core, Flash ROM x 1, SDRAM x 1
)
 Interface circuit (USB2.0 DEVICE, USB2.0 HOST)
 RTC circuit
 Panel interface
 3.5-inch Color LCD interface
 IrDA circuit
Not equipped
Power supply
 Regulator circuit
 Power switch circuit
 Overvoltage protection circuit
 ASIC for control
Printer
 Motor control/drive circuit (PF, CR, APG)
 Printhead control/drive circuit
 Sensor circuits (PE, PF, PW, APG, CDR Guide, CDR Tray)
Card Board
 Logic circuit (card control IC)
 USB HOST I/F circuit
 IrDA I/F circuit
 Memory card control circuit
Not equipped
USB Board
Not equipped
 USB HOST I/F circuit
Panel Board
 Power switch circuit
 Switch circuit
 LED circuit
LCD Module
 LCD control circuit
 3.5-inch Color LCD panel
Not equipped