Epson DFX-8500 service manual Operating Principles

		CHAPTER 2
	OPERATING PRINCIPLES
2.1 PRINTER MECHANISM OPERATION		2-1
2.1.1 Printhead Mechanism		2-4
2.1.2 Carriage Mechanism		2-5
2.1.3 Platen Gap Adjustment Mechanism		2-6
2.1.4 Paper Feed Mechanism		2-7
	2.1.4.1 Tractor Wire Operation	2-9
2.1.5 Ribbon Feed and Tractor Select Mechanisms		2-10
2.1.6 Plunger Mechanism		2-12
2.2 POWER SUPPLY OPERATION		2-13
2.2.1 Power Supply Overview		2-14
2.3 CONTROL CIRCUIT		2-13
2.3.1 Control Circuit Operation Overview		2-17
2.3.2	Reset Circuit	2-21
2.3.3	Sensor Circuits	2-22
2.3.4 CR Motor Drive Circuit		2-25
2.3.5	PF Motor Drive Circuit	2-29
2.3.6	RF Motor Drive Circuit	2-30
2.3.7 PG Motor Drive Circuit		2-31
2.3.8	Plunger Drive Circuit	2-32
2.3.9	Printhead Drive Circuit	2-33