Epson Photo750 manual Paper Feed Pump Motor PF/Pump Motor Drive Circuit

EPSON Stylus Photo 750 Revision A

†Driver on the head

The driver on the head is Nozzle-selector drive circuit. Each drive waveform generated in the drive voltage wave form circuit is charged to the selected nozzle by this circuit with PZT elements, then, printing is performed.

2.2.2.7Paper Feed (Pump) Motor (PF/Pump Motor) Drive

Circuit

IC12 and IC13 on the control circuit board drive PF/PUMP motor. This motor uses 4-phase 200-pole Hybrid type stepping motor and drives constant current bi-pola.

	PFIA0	8
	PFIA1	9				A3956(IC12)
								10
	PFIA2	10			14	D0	OUTA
					9
		11				D1	OUTB	15
	PFPHAA				8
		4				D2	VBB
	PFIB0
					7
		5				PHASE	VCC
	PFIB1
					2 REF
	PFIB2	6		+5
					1 PFD
		7
	PFPHAB
E05B58**(IC2)
						A3956(IC13)
					14	D0	OUTA	10
					9	D1	OUTB	15
C90A05
					8	D2	VBB
(IC1)
					7
						PHASE	VCC
	6 -		7
					2	REF
DA1 112	5 +
					1	PFD
		Current
		Detection
	M6252(IC16)				CN8
					1
					A
					3
					/A
					Rotor
					2
					B
					4
					/B

Figure 2-9. Paper Feed (Pump) Motor Drive Circuit

Operating Principles Operating Principles of Electric Circuit 36