epson 400CH2 free download

File name 400CH2.PDF

Chapter 2 Operating Principles 2.1 OVERVIEW ...1 2.1.1 Printer Mechanism ... 1 2.1.1.1 Printing Mechanism ... 2 2.1.1.1.1 Printing Process ... 3 2.1.1.1.2 Printing Method ... 4 2.1.1.2 Carriage Mechanism ... 7 2.1.1.2.1 Paper Gap Adjust Mechanism ... 10 2.1.1.3 Paper Feed Mechanism and Pump Mechanism ...11 2.1.1.4 Ink System... 14 2.1.1.4.1 Pump Mechanism ... 15 2.1.1.4.2 Cap Mechanism ... 17 2.2 Electrical Circuit Operating Principles ...18 2.2.1 C206 PSB/PSE Power Supply Board ... 19 2.2.2 C206 MAIN Board... 21 2.2.2.1 Reset Circuits ... 23 2.2.2.2 Sensor Circuits ... 24 2.2.2.3 EEPROM Control Circuits ... 25 2.2.2.4 Timer Circuit ... 26 2.2.2.5 DRAM Control ... 26 2.2.2.6 Print Head Control Circuit... 27 2.2.2.7 PF (Pump) Motor Drive Circuit ...