Epson SEIJ98006 PF Motor Driver Circuit, P Fa F, P F - A, P F B, P F - B, EPSON Stylus Color

EPSON Stylus Color 900 Revision C

2.3.4 PF Motor Driver Circuit

Motor drive exclusive IC (LB1847: IC11) enables 4W1-2 phase excitation on the hardware basis. A stepping motor is used for the PF motor to move the carriage accurately and also to improve printing accuracy by minimizing the motor’s vibration during printing. Figure 2-16 shows the PF motor driver circuit block diagram.

				+ 4+24 2 ++4422
E 0 5 B 5 9 ( I C 2 )		L B 1 8 4 7 ( I C 1 1 )				C N 1 0
	1 4 0	2 5
P F I A 0		I A 1		7		1
	1 3 9	2 4
P h a s e A s e t t in g		I A 2	O U T A				P FA F
P F I A 1
c u r r e n t s ig n a l		2 3
	1 3 8			6		3
P F I A 2		I A 3
( 1 6 p a t t e r n s )		2 2	O U T - A
	1 3 7						P F - A
P F I A 3		I A 4
	1 3 3	1 8
P F I B 0		I B 1		9		2	P F B
	1 3 4	1 9	O U T B
P h a s e B s e t t in g
P F I B 1		I B 2
c u r r e n t s ig1 3n 5a l		2 0		8		4
P F I B 2		I B 3
( 1 6 p a t t e r n s )		2 1	O U T - B				P F - B
	1 3 6
P F I B 3		I B 4
P h a s e PC FR PA	1 4 2	2 7
	H( BA )A	P H A S E 1				+ 4 2
	1 2 8	1 6
s e le c t ioP FnP Hs igA Bn a l		P H A S E 2
	1 4 1	2 6
P h a s e C R A ( B )		E N A B L E 1
P F E N B A				1 4
E N B ( p e r m is s io n )		1 7
	1 2 9
s i g n a l P F E N B B		E N A B LVEB2B
		2 V R E F 1		+ 5
		1 3		2 8
		V R E F 2
	1 2 4		V C C
P F C T L 0
	1 2 7
P F C T L 1
M o t o r s u1b2 5
P F C T L 2 N . C .				1 5
c o n t r o l
	1 2 6		G N D
P F C T L ‚R
P F C T L ‚S
	1 2 3
					M 6 2 3 8 3 ( I C 1 7
					3 D / A x x

Figure 2-16. PF Motor Driver Circuit Block Diagram

Operating Principles Electrical Circuit Operation Principles 69