Epson Stylus Photo 1390 - 2.3.2 C655 MAIN Circuit Operating Principle

EPSON Stylus Photo 1390/1400/1410 Revision B
OPERATING PRINCIPLES Electrical Circuit Operating Principles 37
2.3.2 C655 MAIN Circuit Operating Principle
The C655 MAIN Board consists of the following circuits and sensors.
 Logic Circuits (CPU-ASIC 2 in 1, PROM, SDRAM)
 Circuits for controlling and driving Motors
(CR Motor, PF Motor, APG Motor, ASF Motor, Pump Motor)
 Circuits for controlling and driving the Head
 Interface Circuits (USB 2.0)
 Sensor Circuits
 RTC Circuit
 DAC Converter Circuit
 Regulator Circuit
 Complex Circuit (IC8)
The Complex Circuit (IC8) that consists of EEPROM, RTC, and Reset circuit is
installed in the printer. Employing a large-capacity condenser for the Timer allows
to backup the time recorded at power-off for about a week after the power-off.