Cr Motor Driver Circuits - Epson Stylus Color 1520 Service Manual

EPSON Stylus COLOR 1520

2.3.2.3 CR Motor Driver Circuits

The CR motor driver IC SLA7043M (IC15) sends motor phase data using the serial data (XCRCLK,
XCRSTB, CRASERI, CRBSERI) and voltage reference data (CRV) from the gate array E05B34 to the driver
to control the phase current in the driver. The data output from the phase A and phase B (CRASERI,
CRBSERI) are transferred synchronizing with the clock signal (XCRCLK). Then the data is read at the driver
IC by the strobe signal (XCRSTB). This sequence enables the micro step with a minimum of 0.026 mm pulse
driven at 2W1-2 phase excitation. The hold signal (CRHLD) also drives 2 phases to place the CR to the
home position and to the cartridge change position. The Figure 2-22 shows the CR motor driver circuit block
diagram.
GA
E05B34
(IC5)
XCRCLK
XCRSTB
CRASERI
CRBSERI
From CRV0
to CRV6
2-22
PF Motor Drive IC
SLA7043M
(IC17)
5
81
16
80
2
13
101 6
102
17
+5V
CRV 3
14
Figure 2-22. CR Motor Block Diagram
1
CLKA A
CLKB
8
STBA
A
STBB
11
B
DATAA
18
DATAB
B
+42V
REFA
REFB
PF Motor
CR A
CR_A
CR B
CR_B
CRCOM