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EPSON Stylus Photo R1800/R2400
Revision B
Operating Principles
Electrical Circuit Operating Principles
33
2.3.2 C589 MAIN Circuit Operating Principle
The C589 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, IEEE1394
Sensor Circuits
RTC Circuit
DAC Converter Circuit
Low-power Circuit
Logic Circuit Element for 3.3V/1.5V
The +3.3VDC generated on the C589 PSB Board is transformed to +1.5V
by the Regulator IC on the C589 Main Board to use it to drive multiple
components.
This transformation is performed to reduce power consumption of the Logic
Circuit.
The following components operate with the 3.3V/1.5V.
CR Encoder Sensor
PF Encoder Sensor
PW Sensor
Ink Mark Sensor
APG Sensor
PE Sensor
ASF Sensor
Complex Circuit (IC18)
The Complex Circuit (IC18) that consists of EEPROM, RTC, and Reset
circuit is installed on 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.
Summary of Contents for R1800 - Stylus Photo Color Inkjet Printer
Page 8: ...C H A P T E R 1 PRODUCTDESCRIPTION ...
Page 15: ...C H A P T E R 2 OPERATINGPRINCIPLES ...
Page 35: ...C H A P T E R 3 TROUBLESHOOTING ...
Page 68: ...C H A P T E R 4 DISASSEMBLYANDASSEMBLY ...
Page 128: ...C H A P T E R 5 ADJUSTMENT ...
Page 172: ...C H A P T E R 6 MAINTENANCE ...
Page 181: ...C H A P T E R 7 APPENDIX ...
Page 196: ...EPSON Stylus Photo R1800 R2400 Revision B Appendix Circuit Diagram 196 C589 PNL circuit board ...
Page 198: ...C H A P T E R 8 STYLUSPHOTOR2400 ...