Service manual

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 ................................................................................... 30
2.2.2.8 CR Motor Drive Circuit ............................................................................................... 31