Chapter 2Operating Principles

2.1 OVERVIEW............................................................................................................2-1

2.1.1 Printer Mechanism............................................................................................................2-1
2.1.1.1 Printing Mechanism .............................................................................................. 2-2
2.1.1.1.1 Printing Process.........................................................................................2-3
2.1.1.1.2 Printing Method......................................................................................... 2-4
2.1.1.2 Carriage Mechanism............................................................................................. 2-7
2.1.1.2.1 Platen Gap Adjust Mechanism and Paral l el adjustment Mechanism..........2-10
2.1.1.3 Paper Feed Mechanism and Pump Mechanism ...................................................2-11
2.1.1.4 Ink System..........................................................................................................2-14
2.1.1.4.1 Pump, Carriage Lock, Head Cleaner Mechani sm......................................2-15
2.1.1.4.2 Cap Mechanism........................................................................................

2-17

2.2 Electrical Circuit Operating Principles.............................................................2-18

2.2.1 C206 PSB/PSE Power Board ...........................................................................................2-19
2.2.2 C200 Main Board ..............................................................................................................2-21
2.2.2.1 Reset Circuits......................................................................................................2-23
2.2.2.2 Sensor Circuits....................................................................................................2-24
2.2.2.3 EEPROM Control Circuits....................................................................................2-25
2.2.2.4 Timer Circuit........................................................................................................2-26
2.2.2.5 DRAM Control .....................................................................................................2-26
2.2.2.6 Print Head Control Circuit ....................................................................................2-27
2.2.2.7 PF(Pump) Motor Drive Circuit.............................................................................2-30
2.2.2.8 CR Motor Drive Circuit........................................................................................2-31